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Assam Agricultural University, Jorhat

Assam Agricultural University is the first institution of its kind in the whole of North-Eastern Region of India. The main goal of this institution is to produce globally competitive human resources in farm sectorand to carry out research in both conventional and frontier areas for production optimization as well as to disseminate the generated technologies as public good for benefitting the food growers/produces and traders involved in the sector while emphasizing on sustainability, equity and overall food security at household level. Genesis of AAU - The embryo of the agricultural research in the state of Assam was formed as early as 1897 with the establishment of the Upper Shillong Experimental Farm (now in Meghalaya) just after about a decade of creation of the agricultural department in 1882. However, the seeds of agricultural research in today’s Assam were sown in the dawn of the twentieth century with the establishment of two Rice Experimental Stations, one at Karimganj in Barak valley in 1913 and the other at Titabor in Brahmaputra valley in 1923. Subsequent to these research stations, a number of research stations were established to conduct research on important crops, more specifically, jute, pulses, oilseeds etc. The Assam Agricultural University was established on April 1, 1969 under The Assam Agricultural University Act, 1968’ with the mandate of imparting farm education, conduct research in agriculture and allied sciences and to effectively disseminate technologies so generated. Before establishment of the University, there were altogether 17 research schemes/projects in the state under the Department of Agriculture. By July 1973, all the research projects and 10 experimental farms were transferred by the Government of Assam to the AAU which already inherited the College of Agriculture and its farm at Barbheta, Jorhat and College of Veterinary Sciences at Khanapara, Guwahati. Subsequently, College of Community Science at Jorhat (1969), College of Fisheries at Raha (1988), Biswanath College of Agriculture at Biswanath Chariali (1988) and Lakhimpur College of Veterinary Science at Joyhing, North Lakhimpur (1988) were established. Presently, the University has three more colleges under its jurisdiction, viz., Sarat Chandra Singha College of Agriculture, Chapar, College of Horticulture, Nalbari & College of Sericulture, Titabar. Similarly, few more regional research stations at Shillongani, Diphu, Gossaigaon, Lakhimpur; and commodity research stations at Kahikuchi, Buralikson, Tinsukia, Kharua, Burnihat and Mandira were added to generate location and crop specific agricultural production packages.

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  • ThesisItemOpen Access
    Effect of dietary supplementation of curry leaves (Murraya koenigii) powder on the performance and histology of certain lymphoid organs of commercial broiler chicken
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022-09) Deori, Sukanya; Mahanta, Joga Dev
    The present research work was performed to study the “Effect of dietary supplementation of curry leaves (Murraya koenigii) powder on the performance and histology of certain lymphoid organs of commercial broiler chicken”. The study was carried out with 144 numbers of day-old commercial broiler chicks (Cobb-400) obtained from a single hatch with uniform body weight. The weighing and wing banding of the chicks were done individually. The broiler chicks were reared in four different experimental groups viz. T0, T1, T2 and T3 having 36 birds in each group with 3 replicates of 12 birds in each group. The chicks were reared under deep litter system of rearing following standard and uniform managemental practices. The chicks under T0 (control) group was supplemented with only basal diet, whereas the chicks under T1, T2 and T3 groups were supplemented with dried Curry Leaves Powder (CLP) at the level of 0.25, 0.50 and 0.75% in the basal diet, respectively. For the preparation of dried CLP, fresh, and matured curry leaves were collected from the local villages. Then the curry leaves were sun dried for 6 to 7 days on newspaper, until they become crispy while retaining the greenish colouration. After proper drying, leaves were grinded and stored in cellophane bags for further use during the 6 weeks of experimental period. The proximate composition of curry leaf powder was analyzed and incorporated it into the basal diet of broiler chicken at the level of 0.00, 0.25, 0.50 and 0.75%, respectively. During the six weeks of experimental period, the following parameters were studied: performance traits which included weekly feed intake and total feed consumption, weekly body weight and body weight gain, Feed Conversion Ratio (FCR), Broiler Performance Efficiency Index (BPEI) and livability and economics of production, carcass traits like pre-slaughter live weight, dressed weight, dressing percentage, giblet weight, giblet yield, yields of cut-up parts and relative organ weights, organoleptic properties of chicken meat, blood biochemical parameters like serum glucose and superoxide dismutase, and histological observations of lymphoid organs (spleen, thymus and bursa of Fabricius) and jejunum of intestine after the end of six weeks of age. In the present study, the highest feed intake per broiler was recorded in the T3 group (3253.88g) and lowest in the T1 group (3014.19g). The final body weight per broiler was found to be significantly (P<0.05) highest in the T3 group (1989.43±43.16g) followed by T2 (1793.34±34.56g), T0 (1733.76±57.33g) and T1 (1653.31±49.57g) group. During the 6th week of age, the body weight gain was significantly (P<0.05) higher in T3 group (546.37±27.97g) and lowest in the T1 (360.11±17.48g) group. The overall FCR of the entire experimental period was best in the T3 group (1.67) followed by T2 (1.83), T1 (1.87) and T0 (1.90) group. Among the different treatment groups, highest BPEI was found in the T3 group (119.11) followed by T2 (97.99), T0 (91.21) and T1 (88.40) group. The per cent livability of CLP supplemented groups (T1, T2 and T3) was found to be higher (97.22) as compared to control (91.67) group. The production cost per broiler was highest in the T3 group (ƻ) (226.28) followed by T0 (224.90), T2 (224.48) and T1 (213.88) group, respectively. However, the recorded gross profit per broiler was highest in the T3 group (ƻ) (28.87) followed by T2 (17.17), T1 (8.87) and T0 (8.65), respectively. The carcass traits comprising of pre-slaughter live weight, dressed weight, dressing percentage, giblet weight and giblet yield did not differ significantly (P>0.05) under different experimental groups. The per cent yields of cut-up parts like neck, wings,back, breast, thighs and drumsticks showed no significant (P>0.05) differences among the different treatment groups. The per cent weights of relative organs on pre-slaughter live weight basis did not differ significantly (P>0.05) for different experimental groups. In the present study, the blood biochemical parameters like serum glucose and superoxide dismutase (SOD) showed significant (P<0.05) differences among the different experimental groups. The serum glucose level decreased gradually as the level of incorporation of CLP was increased. On the other hand, the SOD level increased gradually with the increased level of CLP in the basal diet. The organoleptic evaluation of broiler chicken meat for colour, flavour, texture, juiciness and overall acceptance did not show any significant (P<0.05) differences among the different treatment groups. The gross, histology and ultrastructure (scanning electron photomicrograph) of lymphoid organs (spleen, thymus and bursa of Fabricius) and jejunum of intestine of T0, T1, T2 and T3 groups of broiler chicken were studied. From the histological observations of lymphoid organs and jejunum, it was found that the average length, diameter, thickness and weight of spleen, thymus and bursa of Fabricius were significantly (P<0.05) higher in T3 group of broiler chicken along with numerous lymphocytes aggregation in these organs. The mean length of villi and diameter of crypts of the jejunum of T3 group of broiler chicken were also significantly (P<0.05) higher as compared to the T0, T1 and T2 groups of broiler chicken. The lymphoid follicle of jejunum of T3 group of chicken contained numerous T and B lymphocytes. This might be due to the concentration and immunogenic effect of CLP. Hence, it can be concluded that, the CLP can be supplemented as herbal feed additives in the diet of broiler chicken at the level of 0.75% to improve the overall performance of broiler chicken with higher gross profit per broiler. The observations in the current study has established a major role in recording the anatomical norms in respect of gross, histology and ultrastructure of lymphoid organs and jejunum of intestine of broiler chickens fed with CLP at different levels.
  • ThesisItemOpen Access
    Quality evaluation and shelf life study of chicken meat patty incorporated with chicken blood plasma and mint powder
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022-09) Barbhuiya, Shakura Siddika; Sapcota, Deben
    The objective of the present study was to evaluate the quality and shelf life study of chicken meat patties incorporated with chicken blood plasma (CBP) and mint powder (Mentha spicata). The parameters studied were physico-chemical properties,microbial count and organoleptic properties of the developed product. The study was conducted in the Department of Poultry Science in collaboration with the Department of Livestock Products Technology and Veterinary Biochemistry, C.V.Sc, Assam Agricultural University, Khanapara,Guwahati-781022. For the experiment required quantity of fresh mint leaves were procured from vegetable mandi and chicken blood from local market. Sodium citrate was used as an anticoagulant. Chicken blood plasma (CBP) was separated from whole blood by centrifugation and preserved in refrigeartion (4°C) till use. Mint leaves were dried by exposing the leaves to 50oC for 2 hrs in a hot air oven and powdered (MP) by using Lab grinder, preserved hermetically till further use. The whole experiment was carried out in two phases. Five replicates of chicken meat patties were made in the first phase consisting of chicken blood plasma (15%) at a fixed level for making four groups at different combinations with MP as; To (0% CBP + 0%MP), T1 (15% CBP + 0%MP), T2 (15% CBP+0.5% MP), T3 (15% CBP+1% MP) and T4 (15% CBP+1.5% MP) while preparing chicken patties blending with the emulsion of following compostions: However, the broiler meat used in T0, T1, T2, T3 and T4 group was 70.0, 55.0, 54.5, 54.0, and 53.5%, respectively. The meat was mixed with following ingredients, vegetable oil (10%), corn flour (5%), spice mix (1.5%), salt (1.5%), condiments (2%) and ice cube (10%). The prepared patties were sliced to its standard size, vacumm packed and stored under refrigeration temperature (4oC) till use. The shelf life of the product was studied under second phase using the parameters such as TBARS, microbiological studies and taste panel evaluation at 0, 3rd, 6th, 9th, 12th and 15th days of storage period at 4oC. The physico-chemical evaluation revealed that 15% addition of CBP increased the pH in T1, T2, T3 and T4 groups. Similar results were obtained from the emulsion stability, protein per cent, moisture content and tyrosine value where significant (P<0.01) increase were found in plasma incorporated group. No effect of mint addition was noticed in any of the above mentioned parameters. TBARS value recorded to be decreased significantly (P<0.01) among the groups and increased with progresssion in storage period of 15 days. Water activity found to be increased significantly (P<0.01) due to 15% CBP incorporation but mint addition at 0.5%, 1.0% and 1.5% level resulted in significant decrease of water activity. No effect of CBP or mint powder (0.5%,1.0% and 1.5%) incorporation was noticed in the thickness(mm) and diameter(mm) of the product. The microbiological study revealed that total plate count (log10cfu/g) and psychrophilic count (log10cfu/g) significantly (P<0.01) increased with the incorporation of 15 % CBP in the product whereas mint addition at 0.5 %,1.0% and 1.5% significantly (P<0.05) decreased the microbial count. Also microbial load increased in all groups during 15 days of storage under refrigeration (4oC). Yeast and mould counts were not found in any of the groups when evaluated at 3 days interval for 15 days. The organoleptic evaluation of chicken meat patties was carried out by using semi trained taste panelist. It involved subjective evaluation and objective evaluation. The subjective evaluation of chicken meat patties showed the most preferred and least liked among the treatment groups. Apperance score was best recorded in T2 group and T4 was least preferred. Colour of the patties was found to be highest in T1 group and T4 received lowest score. Flavour score was recorded highest in T2 group and T4 group found to be received lowest score. Juiciness was recorded to be significantly (P<0.01) higher in plasma added group (T1, T2, T3 and T4). Similarly, texture was found significantly higher in T1, T2, T3 and T4. The T2 group was found most preferred among groups for overall acceptability. The subjective study was carried out using texture analyzer and chromameter. It included texture profile (Hardness,springiness,cohesiveness,chewiness and resilience) shear force and colour profile. Texture profile was found to be significantly (P<0.01) increased due to incorporation of 15 % CBP and mint powder addtion at 0.5 %,1.0% and 1.5% level. The shear force was recorded to be increased among the groups. The colour profile was evaluated by measuring L*, a* and b* value. The L* and b* were found to be significantly (P<0.01) decreasing among the groups as compared to the Control group, whereas, significant increase was found in b* value among the groups compared to the Control group. The cost of production revealed that the Control group was most dearer (Rs. 248.10) followed by T4 (Rs. 237.20), T3 (Rs. 228.50), T2 (Rs. 219.80) and T1 (Rs. 237.20). From the various above findings it could be concluded that chicken meat patties can be prepared with 15% meat replacement by chicken blood plasma incorporating mint leaf powder at three different levels. Among all options the chicken meat patties with 15% CBP and 1.0 % mint leaf powder gave the best results in terms of economy and value addition.
  • ThesisItemOpen Access
    Effect of dietary supplementation of marigold flower powder on the productive performance of broiler chickens
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022-09) Sapcota, Rajsekhar; Saikia, Reema
    The present study was undertaken to evaluate the effect of feeding Marigold flower (Tagetes erecta) powder as a natural feed additive on the performance parameters, economics, carcass characteristics, relative organ weights, cut-up parts weights, subjective meat qualities, objective meat qualities, gut histomorphometry and humoral immunity of commercial broiler chickens. From a single hatch, 120-day-old commercial broiler chicks (Cobb-430y) were obtained. The chicks were weighed, their wings were banded and were then randomly separated into 4 groups: C (control), T1, T2, and T3, each of which contained 30 chicks. Each group was divided into three replicates, each with ten chicks. The chicks were raised using a deep litter management method during the course for a time period of 6 weeks while adhering to hygienic, standard and uniform managemental protocols. The birds under C group were offered basal diet using common feed ingredients (ICAR,2013) with no marigold flower powder (MFP). The birds underT1, T2 and T3 groups were offered basal diet with supplementation of MFP at the level of 0.3%, 0.6% and 0.9% in the feed, respectively. For preparation of MFP, local variety of the same was procured from the flower market of Fancy Bazaar of Guwahati city of Assam. The marigold flowers were first cleaned thoroughly with water to make it free from dirt, dust and foreign bodies and then dried in hot air oven at 50°C for 6-8 hours till crisp and warm, and then ground to a fine uniform powder in a kitchen grade mixer-grinder, and then stored hermetically in a cool, dark and dry place till use. Throughout the course of the trial, all birds in the Control and treatment groups received unlimited access to food and fresh water. The following parameters were examined throughout the six-week trial: Performance parameters which included weekly body weight change and body weight gain, feed consumption, feed conversion ratio (FCR), economics of production and livability; carcass characteristics like pre-slaughter live body weight, de-feathered weight, de-feathering loss, dressed weight, dressing percentage, abdominal fat weight and abdominal fat percentage; relative organ weights such as that of liver, heart, gizzard, head and shank; relative yield of cut-up parts like breast, back, drumsticks, wings, thighs and neck; sensory evaluation on the basis of subjective parameters like colour, flavour, juiciness, texture and overall acceptability; meat quality analysis on the basis of objective parameters such as texture and shear force; gut histomorphometric characteristics, hematological parameters like hemoglobin, packed cell volume, RBC, WBC, MCV, MCH, MCHC counts; and HI antibody titers against Newcastle disease virus. The final body weight per broiler was highest in T2group (2410.83±22.06g) followed byT1 (2367.23±39.48g), T3 (2127.73±23.18g) and C (2008.73±31.24g) groups. The T1, T2 and T3 groups had achieved 17.84%, 20.01% and 5.92% more live body weight than the control group, respectively. There was significant (P<0.01) difference between the control and MFP fed groups. And amongst the latter, T1 and T2did not differ significantly (P>0.05)but there was significant difference between T1, T2and T3 group. The total feed consumption per broiler was highest in T2 group (4016.14g), followed by T1 (3984.17), T3 (3638.69 g) and lowest in C group (3475.98g). The overallFCR for the entire period of the experimental groups was found best in T2 group (1.70) followed by T1 (1.72), T3 (1.75) and C (1.77) groups. The cost of production per broiler was found to be highest in T2 (₹ 284.50) group, followed by T1 (₹ 282.60), T3 (₹ 261.86) and C (₹ 252.00) groups. However, the highest gross profit per broiler was found in T2 (₹ 28.91) group, followed by T1 (₹ 25.14), T3 (₹ 14.74) and C (₹ 9.13) groups. All the experimental groups had 100% livability. Among the carcass quality traits, the pre-slaughter live weight (PSLW)of T2 was found to be the highest (2315.62 ±27.35g) followed by T1 (2247.62±36.23g) T3 (2000.09 ±24.35g)and C (1865.46 ±24.50g) groups. Similarly, the T2 group had the highest dressed weight (1667.26 ±17.79 g) followed by T1 (1617.5 ±37.10g) T3 (1441.45 ±15.35g) and C (1328.64 ±16.85g) groups. T2, T1andT3 groups had 25.48%, 21.74% and 8.49% higher dressed weights than the Control group, respectively. The T2group had the highest abdominal fat weight (89.95 ±1.58 g) followed by T1 (87.38 ±1.73g), T3 (73.73 ±0.45g) and C (62.48 ±1.96g) groups. In all these three parameters, there was significant difference (P<0.01) between the treatment and control groups, however, among the treatment groups, T1 and T2 did not differ significantly (P>0.05). The relative per cent liver weight of T2(3.15 ±0.0%) was found to be the highest followed by T1 (3.12 ±0.05%) T3 (2.92 ±0.05%) and C (2.57 ±0.08%) groups. Among the marigold fed groups, T2, T1, and T3 had 22.56%, 21.40%, and 13.61% higher liver weights, respectively than their Control counterpart. The MFP supplemented groups had significantly (P<0.01) higher liver weights than their control counter parts, but amongst the former, T1 and T2 did not differ significantly (P>0.05).On the other hand, relative intestinal weight of T2 (5.12±0.05%) was found to be the highest followed by T1 (4.89 ±0.05%), T3 (4.72 ±0.05%) and C (4.68±0.06%) groups. In comparison to their Control counterpart, the marigold fed groups i.e., T2, T1, and T3 had 9.40%, 4.48%, and 4.00% higher intestinal weights. The treatment groups had significantly (P<0.01) higher intestinal weights over the control group and amongst them they differed significantly (P<0.05) as well. The mean per cent yield of breast was found to be the highest in T2(24.35 ±0.08%) followed by T1 (23.23 ±0.18%) T3 (22.52 ±0.05%) and C (20.25 ±0.21%) groups. The mean per cent yield of drumsticks were found to be the highest in T2(12.75 ±0.04 %) followed by T1 (11.38 ±0.10%) T3 (10.81 ±0.05%) and C (9.63 ±0.12%) groups. The mean per cent yield of thighs were found to be the highest in T2(13.45 ±0.04 %) followed by T1 (12.28 ±0.11%) T3 (11.71 ±0.03%) and C (10.46 ±0.12%) groups. The marigold fed groups differed significantly from the control (P<0.01) as well as amongst them (P<0.05). The organoleptic qualities of breast and drumstick meats were studied in terms of colour, flavour, juiciness, texture and overall acceptance by utilizing semi trained taste panelists employing Hedonic scale of 1(least) to 7(best).The mean overall acceptance scores of broiler breast and drumstick meats for different treatment groups was found to be the highest in T3 (5.89±0.21 and 6.19±0.21)followed byT2 (5.66±0.16 and 5.97±0.16), T1 (5.58±0.21 and 5.59±0.17) and C (5.00± 0.23 and 5.05±0.25) groups. The MFP supplemented groups had significantly (P<0.01) higher scores of overall acceptance over the control group but did not differ significantly among them (P>0.05).The objective meat quality of breast meat was done using Texture Meter as well as Warner-Bratzler shear force apparatus. The hardness values (kg) of breast meat was found to be the lowest in T2 group (2910.738), preceded by T1 (3060.325), T3 (3085.681) and C (4981.010) groups. Chewiness (g) and Resilience (ratio) were found to be lowest in T3 group (589.094 and 0.111), preceded by T2 (591.11 and 0.127), T1 (868.333 and 0.137) and C (875.273 and 0.142) groups. The mean shear force values (kg) of broiler breast meat was recorded to be the highest in C group (2.50±0.10) followed by T3 (2.02±0.09), T1(2.00±0.07) and T2 (1.80±0.07) groups. In the gut histomorphometric study, it was found that the overall duodenal villi height (μm)along with the number of villi was found to be highest in T2 group, followed by T1, T3 and C. The jejunal villi height was also recorded highest in T2 group followed by T1, T3 and C. Duodenal and jejunal villi crypt ratio was recorded to be the highest in T2 group (4.07 and 12.39), followed by T1 (2.93 and 10.57), T3 (2.12 and 9.84) and C (1.02 and 8.49) groups. All the hematological results are found to be within the standard range, indicating that feeding MFP did not evoke adverse effects in the broilers. In the HI antibody titers study against Newcastle disease virus, there was significant increase (P<0.001) in antibody titer progressively at different days post immunization in all the groups. However, no significant difference was observed between control and any of the three MFP supplemented treatment groups in the 35 days study period, which indicated that the dietary MFP had no significant role in modulation of antibody titer in broiler chickens. According to the findings of the current study, MFP may be utilized costeffectively as a natural feed additive in the diet of broiler chickens at a level of 0.60 % to enhance their general performance as well as meat quality.
  • ThesisItemOpen Access
    Analysis of duck farming systems in Morigaon district of Assam
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022) Dutta, Anuj; Mahanta, Joga Dev
    A survey study was conducted to analyze the duck farming systems in Morigaon district of Assam. For this, two villages from each of the six development blocks with higher duck population were selected and from each village 12 duck farmers were taken as respondents through snow-ball sampling technique. As such 12 duck farmers from 12 villages were interviewed for the purpose making the total sample size 144. Duck farmers having atleast 10 numbers of ducks of different ages and who were experienced in duck farming were considered for the present study as a duck farmer and was interviewed personally through pre-tested interview schedule by the investigator. Further participatory extension methods were deployed to elicit responses from the Key Informants and drawal of final conclusions for the study. Duck keeping was practiced by people from all social classes, regardless of their occupation, religion or educational background. People raised ducks primarily for their eggs and meat and kept their flocks close to their dwellings, involving every member of the family in the process. Majority (50.69%) of the farmers were from middle aged (36-50 years) group. Out of the total farmers under investigation 51.38% got qualification upto 10th standard. Majority (74.30%) of the farmers were from Hindu community. About 74.00% farmers had more than 10 years of experience in duck farming. The demographic distribution of ducks revealed the presence of eight distinctive groups of ducks viz. Pati, Graded, Khaki Campbell, White Pekin, Muscovy, Chara-Chemballi, Indian Runner and Nageswari. The majority of farmers maintained only one breed of duck and the desi breed Pati constituted the majority of duck population. The flock strength ranged from 15-150 numbers of ducks with a mean of 32.27 numbers. The majority (95.83%) of farmers kept a male to female sex ratio of 1:5. The natural incubators were broody duck or hen but few farmers practised artificial incubation. Majority (99.30%) of farmers did not clean eggs and candle the hatching eggs during the process of natural incubation. About 85.00% of duck farmers hatched their duck eggs during the month of April to July (84.84%) and only few farmers performed hatching throughout the year either through natural or artificial means of hatching. According to the size of the bird, a total of 10-12 and 14-18 numbers of hatching eggs were set under each broody hen and duck, respectively. The mean hatchability percentage was recorded as 86.24% with a range of 65.00 - 95.00%. Most of the farmers (92.36%) under study fed their duckling from second day of age onwards with raw ingredients like whole paddy grain, whole rice, broken rice, cooked rice, wheat bran and rice polish upto 4th week of age. Grower and adult ducks were reared by the farmers under scavenging or free range system. Majority (92.36%) of the farmers did not provide artificial warmth to the duckling during brooding period while few farmers (7.64%) provided artificial warmth upto 4 weeks of age. During day time duckling were confined in an open area surrounded by bamboo basket, fish trap or mosquito net where provision of drinking and feeding facilities were provided to save them from predators and wild birds. The majority (98.61%) of farmers followed free range system of rearing for adult ducks and allowed to scavenge them in the foraging field during day time. In the morning, evening and even in noon time supplementary feeds in the form of kitchen waste mixed with cooked rice and rice polish was provided. Another system of duck rearing in which a night holding pen was constructed on an elevated area amidst paddy fields, beels, ponds and other water logged areas to keep the adult ducks during night time. Few duck farmers (8.33%) adopted integrated duck cum fish farming. The major viral, bacterial and fungal diseases encountered in the surveyed area were duck plague, duck cholera, anatipestifer infection, hepatitis (aflatoxicosis) and botulism. Occasionally worm infestation was also found and mortality sometimes occurred due to predators. The mean mortality rate of 8.04% (0-20%) in ducklings, 1.55% (1-3%) in growers and 6.01% (0-10%) in adults was noticed. Majority of farmers (67.36%) did not consult veterinary doctor during the occurrence of any disease. Besides treating the ducks with common antibiotic, vitamin and mineral supplements, liver tonic, they also treated their ailing ducks with indigenous medications. None of the farmers vaccinated their ducks. The mean body weight of adult ducks recorded at 40 weeks of age for Pati, Khaki Campbell and Graded ducks was 1488.92±6.53, 1855.08±6.37 and 1519.00±14.57 g, respectively. The mean egg weight of Pati, Khaki Campbell and Graded ducks at 40th week of age was recorded as 67.04 ± 0.63, 66.42 ± 0.62 and 67.56 ± 0.69 g, respectively. The annual egg production of Pati, Khaki Campbell and Graded ducks was found to be in the range of 90-100, 240-250 and 140 – 150 per duck, respectively. The age at first egg for Pati, Khaki Campbell and Graded ducks ranged from 210-240, 150-180 and 180-200 days, respectively. Most of the farmers maintained their flock for 2-3 years of production. The farmers generally purchased duckling at day-old or at one month of age either from the local market or from their neighbours/local hatchery located in the nearby places. Most of the farmers reared ducks for household consumption and the excess eggs and meat ducks were sold through two types of marketing channel- (I) producer → consumer and (II) producer → middle man → consumer. The table eggs and live ducks were sold @ Rs. 9.00 -10.00 per egg and Rs. 450.00 – 600.00 per duck. Demand and consumption of duck meat increased many folds during winter and festive seasons like Durga puja, Kali puja, New Year‟s Eve, Magh bihu and during picnic season starting from October to February. The duck meat becomes tastier due to fat deposition during the month of November to January. None of the farmers were dependent upon the financial supports from any financial agency. Occasionally, the Krishi Vigyan Kendra, Morigaon distributed improved varieties of duck to the beneficiaries interested in duck farming. Duck farming was found to be a subsidiary source of income for almost all the farmers under study. Non-availability of vaccine was ranked first among all the constraints faced by the duck farmers followed by lack of Governmental financial assistance, lack of proper guidance in duck-rearing techniques, lack of availability of quality duckling, lack of scientific know-how, lack of availability of high yielding duck breeds, higher mortality rate, lack of access to veterinary services. The duck farmers earned an annual profit of Rs. 299.00 per duck.
  • ThesisItemOpen Access
    Development of ready-to-cook chicken chips using spent hen meat incorporated with fenugreek seeds and/or leaves powder
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022-07) Choudhury, Dimpi; Sapcota, Deben
    A study was carried out to develop ready-to-cook chicken chips utilizing spent hen meat incorporated with fenugreek seeds and/or leaves powder. For this study twenty numbers of healthy spent hens were used following standard protocols for slaughtering and processing. Fenugreek (Trigonella foenum graecum) seeds and its fresh leaves were purchased from local market of Guwahati city and processed to powdered form and stored for further use. The fenugreek leaves and the seeds were analyzed for proximate parameters. The fenugreek leaves contained 85.64 ± 0.72 % moisture, 4.62 ± 0.14% protein, 0.94 ± 0.01% ether extract, 1.69 ± 0.13% crude fibre and 10.73 ± 0.12% total ash. While the fenugreek seeds contained 10.26 ± 0.15% moisture, 26.86 ± 0.10% crude protein, 10.72 ± 0.15% ether extract, 47.52 ± 0.39% crude fibre and 3.82 ± 0.07% total ash. The qualitative phytochemical studies of fenugreek seeds and leaves revealed presence of steroids, phenols, tannins, flavanoids, alkaloids and saponins. The antioxidant activity against DPPH radical, total phenolic content and ferric reducing activity of the fenugreek seeds and leaves were studied using ethanolic extract. The mean per cent values of inhibition of DPPH radical by ethanolic extract were observed to be 51.40 ± 2.27 and 64.39 ± 1.73% for fenugreek leaves and fenugreek seeds, respectively. The total phenolic content in ethanolic extract of both fenugreek leaves and fenugreek seeds were recorded as 5.16 ± 0.06 and 15.13 ± 0.02 mg GAE/g, respectively. The mean (±SE) ferric reducing activity by ethanolic extract of both fenugreek leaves and fenugreek seeds were found to be 0.35 ± 0.03 and 0.65 ± 0.04, respectively and thus exhibit remarkable antioxidant activity. The antibacterial activities of both extracts (fenugreek leaves and seeds) exhibited positive reaction against Staphylococcus aureus and Klebsiella spp. at different concentrations showing zones of inhibition ranging from 10 to 19 mm. The extracts of fenugreek seeds exhibited anti-bacterial effect against E. coli but no effect could be found with fenugreek leaves. Moreover, no antibacterial activity could be observed against Salmonella spp. by fenugreek leaves as well as fenugreek seeds. The research trials were continued in two Phases, i.e., I and II. Under Phase I chicken chips was prepared as per standard formulation incorporating fenugreek seeds and/or leaves @ 0.25, 0.50 or 1.00 % level. The products were stored in sealed LDPE bags at ambient temperature (37 ± 2oC) for a period of 30 days. The samples were evaluated for the physicochemical, proximate and sensory parameters at a regular interval of 10 days starting from 0th day, till 30th day. The moisture level in all the treatment groups for fenugreek leaves as well as seeds including that of Control progressively increased as storage period extended till 30th day. The protein percentage in the treatment groups with increase in fenugreek seeds level (0.25, 0.50 and 1.00%) showed to have increased as compared to the Control and the values ranged from 22.33 ±0.22 to 22.85±0.09%. The analysis revealed no significant (P>0.05) differences among the various treatment groups incorporated with fenugreek seeds powder. The data analysis revealed no significant (P>0.05) differences in ether extract among the various treatment groups incorporated with fenugreek leaves powder and control group and with increasing storage period. Significant changes (P<0.05) in total ash content could be noted in the Treatment groups with fenugreek seeds with increase in the level of fenugreek seed powder (0.5 and 1.0%). Significant increase in pH could be seen on 30th day of storage in all the treatment groups including that of Control. The impact of storage could not be noticed in the products made of, either leaves or seeds in terms of tyrosine value. The water activity remained unchanged till the 20th day of storage, however increased significantly (P<0.05) on 30th day whereas no change observed among the treatment groups for both fenugreek leaves and seeds addition. The cooking yield of 90.97 ± 0.76% to 95.00 ± 1.77% range was recorded in the chicken chips incorporated with fenugreek leaves and fenugreek seeds powder. The freshly prepared chicken chips with addition of fenugreek leaves and seeds on day 1 exhibited ‘good’ colour, texture, crispiness scores under hedonic scale. The sensory evaluation of the chicken chips product treated with fenugreek seeds and leaves powder showed low for flavor, after-taste scores and overall acceptability in the Treatment II (FL with 0.50%), III (FL with 1.00%) and Treatment V (FS with 0.50%) & VI (FS with 1.00%) groups throughout the storage period of 30 days. Under Phase I trial, based on the statistical analysis obtained, two best groups FL with 0.25% and FS with 0.25% along with combination of both (FL+FS with 0.25 each) were selected for further studies. All the physicochemical values for the treatment groups were found to be under desirable ranges. Significant increase in the moisture level was found on 30th day of storage as compared to the 0th, 10th and 20th day however, no changes were observed among different treatment groups. The crude protein values ranged from 22.36 ± 0.02 to 23.03 ± 0.06% among all treatment groups. Significantly (P<0.05) high crude protein was recorded in the Treatment A (FS with 0.25%) and Treatment C (FL, FS 0.25% each) when compared with Control. The ether extract and total ash content in chicken chips revealed nonsignificant (P>0.05) changes when compared with the Control group. Storage days showed significant (P<0.05) effect on pH of the products and treatment with combination of fenugreek leaves and seeds significantly showed lower (P<0.05) pH on 30th day when compared with 0th to 20th day of storage. There was no significant difference between the treatment groups and Control group throughout the storage period and the values remained far below permissible limit for all the products. The analysis of variance showed significant difference (P<0.05) in water activity values on 30th day of storage compared to the aw on the 0th, 10th and 20th day of storage. There was no significant (P>0.05) change in cooking yield of the treatment groups with increase in storage period and among the different treatment groups. The TBA values decreased significantly (P<0.05) on the 10th day of storage and remained static thereafter up to 30 days of storage. The cholesterol content of ready-to-cook chicken chips using spent hen with addition of fenugreek seeds and fenugreek leaves are found to be as 30.55 ± 0 .14, 30.45 ±0.21, 30.39 ± 0.16 and 31.44 ± 0.14% for Control, T-A, T-B and T-C, respectively with no significant (P>0.05) changes among the groups. The colour profile for the chicken chips showed significant differences only in L* values while no changes observed in a* and b* values. A significant increase in mean DPPH activity was noted in all the treatment groups incorporated with fenugreek leaves and seeds powder revealing its potential antioxidant capacity. The total plate count analyzed for the products were within the limits and were free from Coliform, Salmonella, Staphyloccocal bacteria and yeast and mould which ensures the microbial safety of the product. No significant difference was noticed for colour, texture, crispiness characteristics among the Control and treatment groups but could retain ‘good’ to ‘very good’ scores for the product. The chicken chips under all treatment groups scored very less scores in terms of flavour, after-taste and overall acceptability with increase in levels of fenugreek leaves and seeds powder. The chicken chips prepared with the incorporation of spent hen and fenugreek leaves or seeds have revealed good antioxidant profile without any noticeable changes in any other physico-chemical parameters and microbiological profile. Fenugreek leaves at 0.25% level can be effectively used in chicken chip preparation using spent hen meat with ‘good’ acceptability having cost of production of ` 7.45 per 30g of the product. It could be concluded that a level of 0.25% fenugreek leaves powder can effectively be incorporated in production of ready-to-eat chicken chips as functional food having added health benefits.
  • ThesisItemOpen Access
    EFFECT OF DRINKING WATER OF DIFFERENT SOURCES ON THE PERFORMANCE OF COMMERCIAL BROILER CHICKEN DURING MONSOON SEASON
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2019-07) KALITA, SANGHAMITRA; Mahanta, J. D.
    The present study was undertaken with a view to compare the effect of drinking water of different sources on the performance of commercial broiler chicken during monsoon season. A total of 450 day-old commercial broiler chicks (Cobb 400) having similar body weight from a single hatch were procured from a local hatchery of Guwahati city. The chicks were weighed and randomly divided into ten experimental groups namely, untreated group with ring well water, treated group with ring well water, untreated group with tube well water, treated group with tube well water, untreated group with bore well water, treated group with bore well water, untreated group with pond water, treated group with pond water, untreated group with rain water and treated group with rain water. Each group consisted of 45 chickens. Further each group was again subdivided in 3 replicates containing 15 chicks in each group. The chicks were wing banded and reared under deep litter system of management throughout the experimental period of 6 weeks following standard and uniform managmental practices. The birds were offered both untreated and treated drinking water of these five sources. The treatment of water was done with the combination of acidifier and sanitizer at the rate each of 0.05 ml per liter of drinking water. The water samples from all the untreated and treated groups were analysed for various physico-chemical and microbiological parameters. During the period of experiment, performance traits of broiler chicken comprising of daily water and feed intake, weekly water and feed consumption, weekly body weight and body weight gain, FCR, BPEI and economy of production were recorded. The carcass traits, certain haematological and biochemical parameter of broiler chicken offered different sources of water were also determined The average value of pH and turbidity of both untreated and treated drinking water differed significantly (P0.05) among the broiler chicken offered different sources and treatment of water. The biochemical parameters namely total serum protein and serum glucose were estimated for broiler chicken offered different sources and treatment of water. The total serum protein levels did not differ significantly (P>0.05) among the broiler chickens offered different sources and treatment of water. However, the serum glucose levels differed significantly (P<0.05) among the broiler chicken offered different sources and treatment of water. The treatment of water significantly (P<0.05) increased the total serum glucose levels of all the groups of broiler chicken offered differed sources of water. Thus, it is concluded that during monsoon season, all the physico-chemical and microbiological qualities of drinking water were found to be within the maximum permissible level after treatment with the combination of Acidifier and Sanitizer @0.01%. Hence, all the treated sources of water under study will be more useful for broiler chicken production during monsoon season.
  • ThesisItemOpen Access
    ANALYSIS OF INDIGENOUS CHICKEN FARMING SYSTEM IN SELECTED DISTRICTS OF BRAHMAPUTRA VALLEY OF ASSAM
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2019-07) ISLAM, RAFIQUL; Kalita, Niranjan
    A study was conducted in all agro-climatic zones of Brahmaputra Valley of Assam to know socio-economic status of indigenous chicken farmers, demographic distribution and morphological characters of indigenous chicken. Different husbandry practices in indigenous chicken, productive and reproductive performances, diseases and mortality pattern, health coverage programme, economics and marketing of indigenous chicken, constraints faced by the chicken farmers, physical and chemical analyses of crop ingesta to know the nutritional status of scavenged chicken and carcass traits were also studied. One district from each zone was selected on the basis highest indigenous chicken population. Again from each district, 10 villages were randomly selected. Further, 5 numbers of farmers were selected randomly from each district, thus a total of 50 farmers were selected from each district. In this way altogether 200 numbers of farmers were selected for the whole study. Farmers were selected on the basis of experience and who kept at least 25-30 numbers of indigenous chicken. The data were collected in a pre-structured interview containing all relevant information pertaining to the study by personal interview method. The data were collected during August, 2017 to July, 2018 Majority (42%) of the respondents belonged to middle age group and most of them (83%) were women. Educational background was poor as two-fifth (42.50%) of them had only up to primary level of formal education. Occupationally there were mostly dependent on agriculture and animal husbandry. Some (21.50%) of them were landless and more than half of the respondents had only up to 5 bighas of land. More than fifty per cent of them were economically weaker with a annual income of Rs.1,00,000/-. Majority (64.50%) was married and three-fifth (59.50%) of them were Hindus, followed by Muslims (37.00%). Majority (59.00%) of them belonged to nuclear family. Mostly (67.50%) women were the owner of the flock and most (62.50%) of them had more than 10 years of experience in chicken farming. Most (94.68) of the indigenous chicken were normal feathered followed by naked neck (5.32%). Mostly males had red coloured plumage, while females were mostly brown mixed colored. Majority of the chicken had single comb. All the birds had red coloured comb. Majority of the chicken had black coloured shank. The overall mean flock size recorded as 29.79±0.28 and each flock constituted mostly by chicks (65.01%), followed by growers (18.78%) and adults (16.20%) in the study areas. Majority (56.50%) of the farmers constructed coop for night sheltering and most (63.00%) of the coops were located outside the dwelling house. The mean dimension and floor space of the coop was 1.73 x 1.18 x 1.01 cubic meters and 2.04 square meters. The coop was constructed by locally available cheap materials. In most of the cases floors (77.50%) and walls (72.50%) were made of bamboo or wooden slated, while 87.50% of the roofs were made of G.I. sheet. The total cost of construction of coop ranged from Rs. 350/- to Rs. 2,250/- with overall mean of Rs. 850/-, which could accommodate up to 30 numbers of chickens. Mostly (74.50%) sand was used as bedding material and 39% of them used bamboo or wooden basket as laying nest. Majority (34.50%) of the respondents cleaned coop weekly once. All the farmers under study revealed that indigenous chicken were provided with supplemental feed in addition to scavenged feed. Majority (65.50%) of the farmers offered grains followed by crop by-products (18.50%) and concentrate feed (16.00%). Most (70.50%) of them used home-mixed grains, while 57% of the respondents offered supplemental feed twice a day. The amount of supplemental feed ranged from 450 to 1000 g daily with an average of 750 g daily for 25 to 30 numbers of chickens. Majority (59.50%) of the farmers provided feed on the ground by throwing and the feed was provided together irrespective of sex and age in most (71.50%) of the cases. About one-third (32.00%) of them provided feed during monsoon season. Limited access for scavenging was the main problems of indigenous chicken feeding as reported by majority (50.50%) of the respondents. More than 90% of the respondents did not provide water troughs to their birds. Majority (86.50%) of the respondents used home produced eggs for incubation. All of them practiced natural incubation and most of them used broody hen (96.50%) for incubation. Hatching was done twice in a year by majority (87%) of the respondents. The male-female ratio was erratic and it varied from 1:5 to 1: 20 with an average of 1:8.5. The mean number of eggs set per broody bird varied from 13.06±0.26 to 13.77±0.25 with an overall mean of 13.59±0.23. Majority (64%) of the farmers retained their cock up to 2 years of age for breeding. More than two-third of the respondents did not practice selection of hatching eggs, while rest (32%) practiced selection on the basis of soundness of shell (68.5). Post-monsoon season was preferred by most (46.5%) of the farmers. Majority (63.5%) of the farmers did not record the duration period for hatching eggs. Storing eggs in the nest before incubation was practiced by majority (85.5%) of the farmers. Most (61.5%) of the respondents culled their surplus chicken stock for sale. Majority (58%) of the respondents culled surplus males and females at the age of 6 to7 months. The overall mean body weights recorded were 32.06±0.26, 752.50±3.99 and 1082.48±6.27 g respectively at 1st week, male grower at 5 months and adult at 10 months of age. The corresponding values for female grower and adults were 637.15±2.87 and 899.75±4.09 g respectively. There was no significant (P≤0.05) difference in body weights among different districts. The overall mean age at first egg was 6.45±0.06 months. The overall mean number of laying cycle per hen per year was found to be 3.30±0.04. The overall mean number of eggs laid in a laying cycle and overall mean annual egg production per hen were found to be 15.91±0.17 and 51.40±0.91 respectively. The overall mean weight was 32.57±0.19 g. The mean fertility and hatchability (On TES) were recorded as 89.73±0.44 and 83.45±1.04 respectively. There was no significant (P≤0.05) difference in fertility and hatchability among different districts. Majority (54.5%) of the farmers did not treat their sick birds, while some (18%) of them consulted with veterinarians for their ailing birds. Most (94.5%) of the farmers did not practice any vaccination programme. None of the farmers practiced deworming in the study areas. Greenish diarrhoea was noticed by most of the farmers as symptoms in any disease outbreak. Ranikhet disease was the most important disease that resulted in highest mortality in a flock as reported by majority (84.5%) of the farmers under study. The overall mean per cent mortality in indigenous chicken recorded as 18.97±0.28, 10.00±0.46 and 5.38±0.17 respectively during 0 to 9, 10 to 20 and above 20 weeks of age in the study areas. There was a significant (P≤0.05) difference in mortality per cent at above 20 weeks of age between districts. The total cost of production per bird up to 72 weeks of age was higher in Sivasagar (Rs. 395.62) than other district. However, the net income and B:C ratio were higher in Sonitpur district. The overall mean egg price was Rs. 8.39±0.16 and live chicken was Rs. 340.90±3.25. The market price of live chicken significantly (P≤0.05) varied from district to district. Four numbers of marketing channels each were identified for live chicken and egg. Lack of veterinary services was the major problem and was ranked first with mean score of 67.91 among all the constraints, followed by disease outbreak (67.59), predator (62.79), damaging crops and vegetable (61.70), external parasites (44.83), improper housing (43.64), inferior productivity of local chicken, unorganized marketing and shortage of feed. The overall mean per cent grains and by-product contents of both male and female crop ingesta were significantly (P≤0.05) higher during post-monsoon season than other seasons. Further, the values recorded during winter season (43.29±0.81%) were significantly (P≤0.05) higher than pre-monsoon and monsoon seasons. There was no difference in per cent grains and by-product contents of both male and female crop ingesta between districts. The overall mean per cent kitchen wastes contents of male crop ingesta were significantly (P≤0.05) higher during pre-monsoon (48.39±1.14%) than other seasons. However the values were comparable between monsoon (41.37±1.23) and winter (40.91±1.21%) seasons. The male crop ingesta contained significantly (P≤0.05) higher per cent kitchen wastes in Dhubri (42.80±1.82%) than Nagaon and Sonitpur districts. Similarly the mean per cent kitchen wastes contents of female crop ingesta were significantly (P≤0.05) higher during pre-monsoon (41.02±1.21%) and monsoon (42.07±1.94%) than post-monsoon and winter seasons. The female crop ingesta contained significantly (P≤0.05) higher kitchen wastes contents in Sivasagar than Nagaon and Sonitpur districts. The overall mean per cent green forage contents of male and female crop ingesta were significantly (P≤0.05) higher during monsoon than other seasons. Further, per cent green forage contents were significantly (P≤0.05) higher in Sonitpur and Nagaon districts in the case of male and female respectively. The overall mean insects and worms contents of male and female crop ingesta were significantly (P≤0.05) higher during monsoon than other seasons. There was no significant (P≤0.05) difference in insects and worms contents of male crop ingesta between districts; however, significantly (P≤0.05) higher insect and worm contents were found in Sivasagar (3.11±0.38%) district than other district in female crop ingesta. The overall mean per cent indigestible miscellaneous particles present in male crop ingesta were significantly (P≤0.05) higher monsoon (14.19±0.55%) than other seasons. The corresponding values were also significantly higher in Nagaon and Sivasagar districts for male and female crop ingesta respectively. The crop ingesta of male and female chicken constituted significantly (P≤0.05) higher per cent of DM during monsoon (51.41±0.52%) and post-monsoon (51.91±0.45%) seasons respectively. There was no significant difference of dry matter contents of crop ingesta between pre-monsoon and winter season in male chicken, however dry matter content was significantly higher during postmonsoon than pre-monsoon and winter seasons. The crude protein content (on DM basis) was significantly higher during post-monsoon and winter seasons than other seasons in males. The crude protein content was significantly (P≤0.05) higher in Dhubri and Sonitpur than Sivasagar district. In females, there was no significant difference in crude protein contents of crop ingesta among different seasons. However, crude protein content in Dhubri was significantly (P≤0.05) higher than other districts in males (10.86±0.30%) and females (10.83±0.30%) respectively. The ether extract content (on DM basis) of male crop ingesta was significantly (P≤0.05) higher during winter season than any other seasons. The corresponding value was significantly (P≤0.05) higher in Dhubri than Sivasagar, however it was comparable with Nagaon and Sonitpur districts. There was no significant difference in ether extract content of female crop ingesta between districts and between seasons. The crude fiber content (on DM basis) of male crop ingesta was significantly (P≤0.05) higher during winter than monsoon and post-monsoon, however it was comparable with pre-monsoon season. There was no significant difference in crude fiber contents of male crop ingesta between districts. However, female crop ingesta constituted significantly (P≤0.05) higher crude fiber contents during pre-monsoon and post-monsoon than monsoon and winter. In Sonitpur district, female crop ingesta contained significantly (P≤0.05) lower crude fiber contents than other districts. The total ash content (on DM basis) of male crop ingesta was significantly (P≤0.05) higher during pre-monsoon than any other seasons. Significantly (P≤0.05) lower content of total ash was found in Nagaon than any other districts. In females, the crop ingesta contained significantly (P≤0.05) lower total ash during monsoon than post-monsoon and winter; however the value was comparable with pre-monsoon season. There was no significance difference in total ash content of female crop ingesta between districts. The calcium content (on DM basis) of male crop ingesta was significantly (P≤0.05) higher during pre-monsoon than monsoon and post-monsoon; however the values were comparable with winter season. The calcium content of male and female crop ingesta was significantly (P≤0.05) higher in Dhubri than any other districts. In winter season, the female crop ingesta contained significantly higher calcium than any other seasons. The total phosphorous content of male and female crop ingesta did not differ significantly between seasons and districts. The pre-slaughter live weight (g), dressed yield (%) and thigh yield (%) of both males and females did not differ significantly (P≤0.05) either between districts or between seasons. Similarly, wings yield (%), drumsticks yield (%), breast yield (%) and back yield (%) of male did not differ significantly between districts and seasons. The mean per cent giblet yield in both male (6.15±0.04%) and female (6.14±0.05%) were significantly (P≤0.05) higher during monsoon than other seasons but the values were comparable with pre-monsoon season. The overall mean per cent giblet yield was significantly (P≤0.05) higher in Sivasagar than other districts in both males and females. The overall mean per cent head yield was significantly (P≤0.05) higher during premonsoon than other seasons; however it was comparable with post-monsoon season.
  • ThesisItemOpen Access
    EFFECT OF FEEDING GINGER (ZINGIBER OFFICINALE) ROOT POWDER ON GROWTH PERFORMANCE, CARCASS CHARACTERISTICS AND BLOOD BIOCHEMICAL PARAMETERS IN BROILER CHICKENS
    (College of Veterinary Science, Assam Agricultural University Khanapara, Guwahati-781022, 2017-07) Das, Pranjal; Talukdar, J. K.
    A total of one hundred eighty day old commercial broiler chicks (Cobb-400 Y) having similar body weight from a single hatch were procured to study the effect of feeding ginger (Zingiber officinale) root powder on some economic parameters in broiler chickens. The chicks were randomly divided into four groups viz.T0, T1, T2 and T3 containing 45 chicks in each group. Each group was further subdivided into 3 replicates of 15 chicks in each group. The birds under T0 group were offered basal diet without addition of ginger powder, while the birds under T1, T2 and T3 groups were given ginger powder with feed at the rate of 1.5, 2.0 and 2.5 % level respectively and used in the feeds of broiler chickens for a period of six (6) weeks. All the birds of four groups were offered ad libitum feed and water and maintained under uniform managemental condition. The total feed consumption per broiler for different experimental groups was the highest in T0 group (4011.11g) and was the lowest in T3 group (3924.44g).The final body weight per broiler was the highest in T2 group (2268.22 + 3.02g) and was the lowest in T0 (1890.22 + 4.32g) group. The overall feed conversion ratio for the entire period was the best in T2 group (1.59), followed by T1 (1.64), T3 (1.68) and T0 (1.84) groups. The broiler performance efficiency index was the highest in T2 (142.65) group and was the lowest in T0 (165.86). The livability per cent was 100% for the T1 and T2 groups, followed by T3 (97.77%) and T0 (95.55%). The cost of production per broiler including the additional cost of ginger powder and gross profit were the highest in T2 (Rs. 182.19 and Rs.32.50) and were the lowest in T0 (Rs. 165.86 and Rs. 13.68) group. All carcass traits (dressed weight, giblet weight and giblet yield) except dressing percentage differed significantly among different experimental groups. The dress weight (1636.40 + 21.44 g), giblet weight (120.20 + 1.35 g) and giblet yield (5.35 + 0.02%) found to be higher in T2 group of birds. The control group of birds (T0) had the lower values for all these carcass traits. The per cent yield of cut-up parts like wing, back, breast and drumstick except neck and thigh differ significantly among different treatment groups. The per cent weight of wings (12.75 + 0.31), back (19.71 + 0.49), breast (25.05 + 0.45) and drumstick (14.92 + 0.52) found to be higher in T2 group of birds. The per cent weights of relative organs of broiler on dressed weight basis did not differ significantly among different treatment groups, except the per cent weight of abdominal fat. The per cent weight of abdominal fat was significantly decreased in T3 group (0.51 +0.06) followed by T2, T1 and T0 groups. Among the biochemical parameters serum glucose, total serum cholesterol, triglyceride, and LDL had significantly lower values in T3 group, followed by T2, T1 and T0 groups. The HDL values increases significantly in T3 group, followed by T2, T1 and T0 groups. All the haematological parameters except haemoglobin and PCV recorded in the present study did not differ significantly among different treatment groups. The haemoglobin values significantly higher in T3 and T2 groups (11.75 +0.07 and 11.51 + 0.20) as compared to T1 and T0 (10.23 + 0.10 and 9.82 + 0.01) groups. The PCV values increases significantly in T3 group (28.46 + 0.04) followed by T2 (26.65 + 0.06), T1 (25.06 + 0.29) and T0 (22.32 + 0.12) groups. The result of present study indicated that the ginger powder can be used economically as a natural feed additive in broiler chicken diet at the level of 2.0% to improve the overall performance of commercial broiler chickens.
  • ThesisItemOpen Access
    EFFECT OF DIETARY SUPPLEMENTATION OF TURMERIC (Curcuma longa) POWDER ON THE PERFORMANCE OF COMMERCIAL BROILER CHICKEN
    (College of Veterinary Science, Assam Agricultural University Khanapara, Guwahati-781022, 2017-07) Choudhury, Dimpi; Mahanta, J. D.
    The present study was undertaken to investigate the effect of dietary supplementation of turmeric (Curcuma longa) powder on the performance of commercial broiler chicken. A total of one hundred and forty four (144) day-old commercial broiler chicks (Cobb 400) from a single hatch were procured. The broiler chicks were randomly divided into four groups viz. T0, T1, T2 and T3 consisting of 36 number of birds in each group. Each group was further sub divided into 3 replicates consisting of 12 birds in each sub group. The chicks were wing banded and reared under deep litter system of management throughout the experimental period following standard and uniform managemantal practices. The birds under T0 group (control) were offered basal diet without addition of turmeric powder. The birds under T1, T2 and T3 groups were fed turmeric powder at the rate of 0.25, 0.50 and 0.75% in the feed (on dry matter basis), respectively. For preparation of turmeric powder, raw turmeric rhizomes were procured and washed. Then these were boiled in water for 30 minutes and sun dried for 15 days after slicing into thin long pieces. The dried turmeric was ground to powdered form and stored at room temperature and used in the broiler starter and finisher feed for a period of 6 weeks. All the birds under the control and treatment groups were offered ad libitum feed and water throughout the experimental period. The birds of all the four groups were reared separately and maintained under uniform managemental condition. The following parameters were studied during the experimental period of 6 weeks: performance traits which included weekly feed intake and feed consumption, weekly body weight and body weight gain, Feed Conversion Ratio (FCR), Broiler Performance Efficiency Index (BPEI) and livability, economics of production, carcass traits like dressed weight, dressing percentage, giblet yield and relative organ weights including lymphoid organs, haematological parameters like haemoglobin, Packed Cell Volume (PCV), total RBC count, total WBC count and WBC differential count (Neutrophil, Eosinophil, Monocyte and Lymphocyte) and blood biochemical parameters like total serum cholesterol, triglycerides, HDL, LDL, serum glucose, ALT and Glutathione peroxidase. The total feed consumption per broiler for different experimental groups was highest in T3 group (3659.02g) and lowest in T1 group (3561.11g). The final body weight per broiler was highest in T3 group (2134.56 ± 25.82g) followed by T2 group (2049.36 ± 31.07g), T1 (1963.97 ± 39.36g) and T0 (1900.28 ± 31.27 g). The overall FCR of the entire period of the experimental groups was best in T3 group (1.71) followed by T2 (1.75), T1 (1.81) and T0 (1.88) group. Among the different xperimental groups, T3 showed the highest BPEI (124.82) followed by T2 (117.09), T1 (108.50) and T0 (101.08). The per cent livability of all the experimental groups was cent per cent (100). The cost of production per broiler including the additional cost of turmeric powder was highest in T3 (₹ 177.50) followed by T2 (₹ 174.50), T0 (₹ 172.14) and T1 (₹ 172.09) group. However, gross profit per broiler was found to be highest in T3 group (₹ 35.96) followed by T2 (₹ 30.44), T1 (₹ 24.30) and T0 (₹ 17.86) group. All the carcass traits like dressed weight, dressing percentage and giblet weight except giblet yield showed non-significant (P>0.05) differences among the experimental ABSTRACT groups. The per cent giblet yield was significantly (P≤0.05) higher in T0 group (4.96 ± 0.19) than T2 (4.34 ± 0.21) and T3 (4.25 ± 0.08) group. The per cent yield of cut-up parts such as neck, wings, back, breast, thighs and drumsticks did not differ significantly (P>0.05) among the different treatment groups. The per cent relative organ weights on dressed weight basis did not differ significantly (P>0.05) among the different treatment groups of broiler chicken except the per cent weights of liver. The per cent weight of liver of the turmeric treated groups (T1, T2 and T3) were 2.21 ± 0.04, 2.03 ± 0.08 and 1.98 ± 0.08, respectively which showed significantly (P≤0.05) lower values than the control group (2.46 ± 0.09). All the lymphoid organs like spleen, thymus and Bursa of Fabricius showed non-significant (P>0.05) differences among the different experimental groups. The haematological parameter like haemoglobin, PCV, total WBC count, WBC differential count did not differ significantly (P>0.05) except total RBC count which was recorded as 2.46 ± 0.02, 2.55 ± 0.03, 2.52 ± 0.04 and 2.59 ± 0.03 million/mm3 for T0, T1, T2 and T3 groups, respectively and it was found that total RBC count in the turmeric treated at the level of 0.75% showed significantly (P≤0.05) higher value as compared to the control group. Moreover, the total lymphocyte count was significantly (P≤0.05) higher in T3 (93.86 ± 0.75 thousand/mm3), T2 (93.84 ± 1.97 thousand/mm3) and T1 (91.58 ± 3.38 thousand/mm3) group as compared to T0 (82.98 ± 3.67 thousand/mm3) group. The biochemical parameters (total serum cholesterol, HDL, LDL and ALT) except serum glucose, triglycerides and glutathione peroxidase differed significantly (P≤0.05) among the experimental groups in the current study. The total serum cholesterol was found to be significantly (P≤0.01) lower in T3 (140.97 ± 3.06 mg/dl) and T2 (148.24 ± 3.62 mg/dl) group as compared to control group T0 (158.87 ± 2.31 mg/dl). Significantly (P≤0.01) higher HDL values were recorded in T3 (119.22 ± 8.17 mg/dl) and T2 (105.68 ± 8.06 mg/dl) group as compared to T0 (82.13 ± 5.13 mg/dl) group. The LDL levels among different groups differed significantly (P≤0.05) and all the turmeric treated groups (T3, T2 and T1) showed significantly (P≤0.05) lower values in comparison to control group (T0). The LDL level was significantly (P≤0.05) lowest in T3 (20.89 ± 8.44 mg/dl) group and highest in control group (54.39 ± 5.21 mg/dl). The ALT level was significantly (P≤0.01) lowest in T3 (19.51 ± 0.60 U/ml) and highest in control group (29.00 ± 1.94 U/ml). The various organoleptic parameters of broiler meat like colour, flavor, texture, juiciness and overall acceptability did not differ significantly (P>0.05) among the different experimental groups. Thus, it is concluded that the turmeric powder can be used effectively and economically as natural feed additive at the rate of 0.75% in commercial broiler chicken feed to improve the overall performance of the birds.