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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 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.