Loading...
Thumbnail Image

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.

Browse

Search Results

Now showing 1 - 8 of 8
  • 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
    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.
  • ThesisItemOpen Access
    SEX SEPARATE REARING IN RELATION TO THE PERFORMANCE OF COMMERCIAL BROILER CHICKEN
    (College of Veterinary Science Assam Agricultural University Khanapara, Guwahati-781022, 2016-07) Kalita, Sanghamitra; Kalita, Kula Prasad
    An experiment was carried out on the topic “Sex separate rearing in relation to the performance on commercial broiler chicken”. 210 day-old commercial broiler chicks (Cobb-400 Y) having similar body weight from a single hatch was procured. The straight run commercial broiler chicks were reared from day-old to 21 days of age under standard managmental practices. Sex separation was done by observing the early appearance of comb in case of male birds. At 22 days of age, 180 birds were randomly selected from the flock and it was categorized into three treatment groups viz., T0 (60 Straight run or mixed sex i.e. 30 males and 30 females), T1 (60 males) and T2 (60 females). Each group was divided into 3 replicates with 20 chicks each. The chicks were wing banded and reared under deep litter system of management throughout the experimental period following standard managmental practices. All the birds were offered ad libitum drinking water and commercial feed throughout the experimental period. During the 6 weeks’ trial period following parameters were studied: body weight, body weight gain, feed intake, feed conversion ratio, broiler performance efficiency index, cost of production, uniformity, survivability, carcass characteristics and organoleptic evaluation. The final body weight per broiler was highest in T1 (male) group (2509.17 ± 22.24 g) followed by T0 (mixed-sex) group (2322.11 ± 33.38 g) and T2 (female) group (2226.67 ± 19.64 g). The highest weight gains at 6th week was observed in T2 (female) group (281.50 ± 15.41 g) followed by T1 (male) (254.50 ± 18.31g) group and T0 (mixed-sex) (230.87 ± 12.07 g) group. At 4th and 5th week of age the weekly average feed intake was highest in T1 (male) group (915.66 and1509.55 g) followed by T0 (mixed-sex) group (888.83 and 1410.5g) and T2 (female) group (824.66 and 1234.5 g). At 6th week of age the highest feed intake was observed in T2 (female) group (607.166g) followed by T0 (mixed-sex) (495.33g) and T1 (male) (488 g) group. The overall F.C.R was best in T1 (male) group (1.77, 1.90 and 1.91) followed by T0 (mixed-sex) (1.77, 1.92 and 2.11) and T2 (female) (1.83, 1.94 and 2.15) group. Broiler performance efficiency index was found to be highest in T1 (male) group (108.15) followed by T0 (mixed-sex) (98.81) and T2 (female) group (87.26). The livability was cent percent in T1 (male) and T2 (female) group. In T0 (mixed-sex) livability was 85 percent. The cost of production per broiler was higher in T1 (male) group compared to T2 (female) and T0 (mixed-sex) respectively. However, the gross profit per broiler was higher by Rs. 23.21 in T1 (male) group and Rs.14.53in T0 (mixed-sex) as compared to T2 (female) group. At the final body weight the highest uniformity was observed in T1 (male) (90%) group compared to T2 (female) (80%) and T0 (mixed-sex) (70.17 %) respectively. The carcass quality traits namely live weight, gizzard percent yield and heart percent yield of different treatment groups did not differ significantly and dressed percent yield, liver percent yield and gizzard percent yield was differed significantly. The dressed percent yield was significantly higher in T1 (male) group (71.56 ± 0.01) compared toT0 (mixed-sex) (70.22 ± 0.05) and T2 (female) (69.31 ± 0.07). The highest liver percent yield was observed in T1 (male) group (1.74 ± 0.13), T2 (female) (1.66 ± 0.03) and T0 (mixed-sex) (1.33 ± 0.03). Significantly higher value of giblet was observed in T1 (male) group (3.17 ± 0.14) compared to T2 (female) (3.06 ± 0.07) and T0 (mixed-sex) (2.70 ± 0.05). Among the cut up parts the neck and breast percent yield showed the significant difference. The highest neck percent yield was observed in T0 (mixed sex) (5.43± 0.24) compared to T1 (male) (4.82 ± 0.10) and T2 (female) (4.54 ± 0.12) compared to T0 (mixed-sex) (36.02 ± 0.58) and T1 (male) (33.75 ± 0.79). The average score for organoleptic character such as tenderness, juiciness, and overall acceptability of meat of broilers observed no significant difference (P<0.05) except flavor. The flavor was significantly higher in T1 (male) group (7.26 ± 0.09) as compared to T0 (mixed-sex) (7.16 ± 0.07) and T2 (female) (6.89 ± 0.08) group.
  • ThesisItemOpen Access
    EFFECT OF FEEDING GARLIC (Allium sativum) AS PREBIOTIC ON THE PERFORMANCE OF COMMERCIAL BROILER CHICKEN
    (Assam Agricultural University, Khanapara, Guwahati, 2016-07) BORGOHAIN, BONDANA; Mahanta, J. D.
    This study was undertaken to investigate the effect of feeding garlic (Allium sativum) as prebiotic on the performance of commercial broiler chicken. One hundred and forty four day-old commercial broiler chicks (Cobb-400 Y) having similar body weight from a single hatch was procured. The chicks were randomly divided into four groups viz. T0, T1, T2 and T3 containing 36 chicks in each groups. Each group was further subdivided into 3 replicates of 12 chicks in each group. The chicks were wing banded and reared under deep litter system of management throughout the experimental period following standard and uniform managemental practices. The birds under T0 group were offered basal diet without addition of garlic powder. The birds under T1, T2 and T3 groups were given garlic powder with feed at the rate of 0.5, 1.0 and 1.5% level respectively. All the experimental groups were provided commercial brand of probiotic powder (Probios) at the recommended dose of 1g/litre of drinking water. For preparation of garlic powder, garlic bulbs were peeled off and sun-dried for three days. Then these bulbs were dried in Hot Air Oven at a temperature of 500C. The dried substances were ground to obtain the dry garlic powder and were stored at room temperature and used in the feeds of broiler chickens for a period of six (6) weeks. The garlic powder was incorporated into the diets at 0, 0.5, 1.0 and 1.5% levels (on dry matter basis). All the birds under 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. During the six (6) weeks of experimental period, following parameters were studied: performance traits like 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 carcass quality traits, relative organ weights including lymphoid organs, haematological parameters like hemoglobin , Packed Cell Volume , total RBC count, total WBC count and WBC differential count (Neutrophil, eosinophil, monocyte, lymphocyte) and biochemical parameters like total serum cholesterol, HDL, LDL, triglycerides, serum glucose and ALT. The total feed consumption per broiler for different experimental groups was highest in T2 group (3633.23g) and lowest in T0 group (3390.96g). The final body weight per broiler was highest in T2 group (2175.00± 31.90 g) followed by T3 (2008.3± 34.13 g), T1 (1986.11± 30.85 g) and T0 (1904.86± 27.05 g). The overall FCR of the entire period of the experimental groups was best in T2 group (1.67) followed by T3 (1.74), T0 (1.78) and T1 (1.80) group. Among the different experimental groups, T2 showed the highest BPEI (130.24) followed by T3 (115.45), T1 (110.28) and T0 (106.96) group. 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 garlic powder was highest in T3 (Rs. 167.87) than T2 (Rs. 166.31), T1 (Rs. 157.59) and T0 (Rs. 144.70). However, gross profit per broiler was found to be highest in T2 group (Rs. 51.19) followed by T0 (Rs. 45.73), T1 (Rs. 41.01) and T3 (Rs. 32.93) group. All carcass quality traits (live weight, dressed weight and dressing percentage and giblet weight) except per cent yields of giblet did not differ significantly among different experimental groups. The giblet yield (%) was significantly higher in T0 group (5.61± 0.17) than T1 (5.08± 0.10), T2 (4.88± 0.05), T3 (4.85± 0.09). The per cent yield of cut-up parts like neck, wing, back, breast, thigh and drumstick did not differ significantly among different treatment groups. The per cent weights of relative organs of broiler chicken on dressed weight basis did not differ significantly among different treatment groups except the per cent weights of liver, gizzard, lungs and abdominal fat. The per cent weights of liver, gizzard, lungs and abdominal fat of T0 group (2.41, 2.48, 0.97 1.31 per cent) were higher than the garlic fed groups. Among the lymphoid organs, both bursa and thymus showed no significant difference in per cent weights between the different treatment groups except the per cent weights of spleen. The spleen weight decreased significantly (P<0.05) in T2 (1.68±0.07) and T3 group (1.72± 0.07) as compared to T0 (2.31±0.05) and T1 (2.27± 0.04). All the haematological parameters except haemoglobin and total RBC recorded in the present study differed significantly among different treatment groups. The total WBC was significantly higher in T2 (85.69 ± 2.18) and T3 groups (85.11 ± 1.46) as compared to T0 (71.12 ± 1.82) and T1group (72.52 ± 1.93). The WBC differential count (Neutrophil, Eosinophil, Monocyte and Lymphocyte) was significantly higher in T2 (Neutrophil- 4.52 ± 0.11, Eosinophil- 0.76 ± 0.09, Monocyte- 1.08 ± 0.06 and Lymphocyte- 70.58 ± 1.00 million/mm3) and T3 groups (Neutrophil- 4.69 ± 0.11, Eosinophil- 0.89 ± 0.09, Monocyte- 1.12 ± 0.03 and Lymphocyte- 71.89 ± 0.97 million/mm3) as compared to T0 (Neutrophil – 4.16 ± 0.14, Eosinophil – 0.52 ± 0.07, Monocyte – 0.91 ± 0.03 and Lymphocyte – 64.19 ± 1.78) and T1group (Neutrophil- 4.32 ± 0.13, Eosinophil-0.63± 0.06, Monocyte- 0.99 ± 0.03 and Lymphocyte-66.26 ± 1.65 million/mm3). The values of all the biochemical parameters (total serum cholesterol, HDL, LDL, triglycerides and ALT) except serum glucose recorded in the present study differed significantly (P<0.01) among different treatment groups. The total serum cholesterol was found lowest in T3 and T2 (109.48 and 110.89 mg/dl) as compared to T0 and T1 group (165.01 and 146.48 mg/dl). The values of HDL in T2 and T3 (82.02 and 83.13mg/dl) were significantly higher as compared to T0 and T1 group (47.42 and 57.47 mg/dl). The LDL level was significantly (P<0.01) lowest in T2 (18.27 ± 3.85 mg/dl) and highest in control group (96.85 ± 4.88 mg/dl). The serum triglycerides level was significantly (P<0.05) lowest in T3 (50.43 ± 3.11 mg/dl) and T2 (53.74 ± 2.76 mg/dl) and highest in control group (103.74 ± 2.91mg/dl). The ALT levels was significantly (P<0.05) lowest in T2 (24.27 ± 0.55 U/ml) and highest in control group (26.29 ± 0.74 U/ml). Thus, it is concluded that garlic powder can be used effectively as prebiotic in feed at the level of 1.0% to improve the overall performance of broiler chicken.