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 - 9 of 11
  • ThesisItemOpen Access
    Effect of feeding varying levels of subabul (Leucaena leucocephala) leaf meal on the performance of broiler chicken
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022-09) Medhi, Tanmoy; Bhuyan, Robin
    An experiment was conducted to study the effect of feeding varying levels of subabul (Leucaena leucocephala) leaf meal on on growth, nutrient utilization, blood biochemical profile, carcass characteristics and to evaluate economics of feeding in commercial broiler chicken. One hundred eighty (N=180) commercial broiler chicks (Vencobb 400) were randomly distributed into 4 groups (T0, T1, T2 and T3) on live weight basis comprising of 45 chicks in each group with three replicates of 15 chicks in each. The control group (T0) was fed with a standard pre starter, starter and finisher broiler ration as per ICAR (2013) specifications. The chicks belonging to group T1 was fed with standard ration along with 5% inclusion of subabul leaf meal. Birds belonging to group T2 and T3 were fed rations along with inclusion of 10% and 15% subabul leaf meal, respectively in all pre-starter, starter and finisher phases. At the end of pre-starter, starter and finisher phases blood samples were collected and analysed for blood biochemical parameters. Three birds from each group were slaughtered to study the carcass characteristics and chemical composition of meat. The economics of feeding and broiler production were evaluated. Highly significant (p<0.001) differences were observed in weekly change in body weight, weekly and total gain in body weight, weekly and total feed intake, feed conversion ratio, digestibility of nutrients, retention of nitrogen. Dietary inclusion of subabul leaf meal at 5% level had no adverse effect on growth performance, digestibility of nutrients and carcass characteristics. Non-significant (p>0.05) differences were observed in retention of calcium and phosphorus, dressing percentage, yield of prime cuts, serum total protein, total cholesterol and total triglyceride level. Cost of production when calculated revealed that inclusion of subabul leaf meal at 5% level in broiler rations was more profitable than feeding diets without any inclusion or beyond 5% level of inclusion i.e. 10% and 15%. The highest gross profit was observed in treatment group T1, receiving 5% inclusion of subabul leaf meal. Hence, the study indicated that broilers could be reared more economically and profitably on broiler rations with 5% level of subabul leaf meal inclusion.
  • ThesisItemOpen Access
    Performance of broiler chicken on feeding diet containing ginger oil
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022) Saikia, Koustov; Gohain, Anurup Kr
    An experiment was conducted to study the performance of broiler chicken fed diet supplemented with different levels of ginger essential oil. One hundred and eighty (n=180) day old broiler chicks of Ven-Cobb400 strain having similar body weight were distributed randomly into four groups (T0, T1, T2 and T3) having 45 chicks in each group on the basis of their body weight. 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 essential oil while the birds under T1, T2 and T3 groups were given ginger essential oil with feed at the rate of 100,150 and 200mg/kg feed 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 result of the experiment showed significantly (P<0.05) higher body weight gain and total weight gain in T2 group than the groups T0, T1 and T3. The total feed consumption per broiler for different experimental groups was the highest in T1 group and was the lowest in T3 group. Digestibility of DM, metabolizability of CP and N retention was significantly higher (P<0.01) in the treatment groups T0, T1 and T3 than the control group T0. In the carcass traits, the dressing percentage, breast muscle weight and thigh muscle weight were significantly (P<0.05) higher in T1, T2 and T3 group as compared to control group T0. Dressing weight, Abdominal fat, giblets and lymphoid organs were significantly (P>0.05) did not differ among the groups. Significant (P<0.01) differences were observed in serum glucose and HDL-C values in T2 and T3 groups whereas other blood biochemical profiles like total protein, albumin, globulin, albumin and globulin ration, LDL-C and GGT did not differ significantly (P>0.05) among the groups. The cost of production per broiler including the additional cost of ginger powder and gross profit were the highest in T2 and were the lowest in T0 group. The result of present study indicated that the ginger essential oil can be used economically as a natural feed additive in broiler chicken diet at the level of 150mg/kg feed to improve the overall performance of commercial broiler chickens.
  • ThesisItemOpen Access
    Performance of broiler chicken fed on diet supplemented with oregano essential oil
    (College of Veterinary Science, Assam Agricultural University, Khanapara Campus, 2022) Borah, Biswajit; Gohain, Anurup Kumar
    An experiment was conducted to study the performance of broiler chickens fed on a diet supplemented with Oregano Essential Oil. For the study, One Hundred eighty (n=180) Day old Broiler chicks of Ven Cobb 430Y strain were randomly divided into four groups (T0, T1, T2 and T3) having 45 chicks per group on the basis of their body weight, the groups were again subdivided into 3 replicates of 15 birds each. The control group was fed with basal diet or the standard pre-starter, starter and finisher diet which were formulated to meet the nutrient requirements as per ICAR, 2013 with the locally available ingredients. And the other three groups were fed with the same basal diet like the CONTROL group but with an additional supplementation of Oregano Essential Oil in the following concentrations: T1 (OEO@200mg/kg basal diet), T2 (OEO@400mg/kg basal diet) and T3 (OEO@600mg/kg basal diet). The experimental results showed significantly (p<0.05) higher change in the body weight, total gain in the body weight, total feed intake and overall feed conversion efficiency in the groups T2 and T1 than the groups T3 and T0. The Broiler Performance Efficiency Index (BPEI) was also higher in the group T2 followed by T1, T3 and T0 respectively. Digestibility of Dry Matter (DM) and retention of nutrients like Nitrogen were found to be significantly (p<0.05) better in the treatment group then the control group. The Dressing percentage (%PSW) was also significantly improved in the treatment groups; T2 was having the highest dressing % followed by T1, T3 and T0. The weight of the Cut Parts (%PSW) was better in the treatment group; however, there was no significant difference. The giblet weight (%PSW) was also not significantly different among the groups. There was no significant (p>0.05) in terms of Total protein, HDL-C, and LDL-C. The blood lipid profile was also not significantly (p>0.05) different among the different treatment groups. And also there was no significant (p>0.05) difference was observed in terms of caecal microbial load. The study revealed that supplementation of Oregano Essential Oil at a concentration of 200mg/kg basal diet improved the net profit of the broiler production. On the basis of all these experimental findings supplementation of OEO @400mg/kg basal diet was found to be better on the growth performance of the broiler chicken.
  • ThesisItemOpen Access
    EFFECTS OF FEEDING OF PREBIOTICS, PROBIOTICS AND SYNBIOTICS IN BROILER CHICKEN ON CORN-SOYA BASED DIET
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2022-01) FANCON, AIBANIAIRI; Bhuyan, Robin
    An experiment was conducted at the Experimental Poultry Shed of the Department of Animal Nutrition, College of Veterinary Science, Assam Agricultural University, Khanapara, Assam to assess the effect of dietary supplementation of Prebiotic, Probiotic and Synbiotic on the performance, nutrient utilization, haemato-biochemical parameters and carcass traits of broiler birds. One hundred and eighty (N=180) day old commercial (Ven Cobb) broiler chicks were randomly distributed into four treatments groups.Each treatment had three replicates with 15 chicks in each replicate.Dietary groups consisted of Group-T0(control) birds which were fed basal diet without any supplementation;In Group- T1, birds were fed basal diet supplemented with Prebiotic (@ 0.2%); Group-T2: basal diet with 0.035% Probiotic; Group-T3(Synbiotic) contains basal diet with Prebiotic @0.2% + Probiotic @ 0.035 respectively. The basal diet was prepared as per ICAR (2013) recommended for Pre-starter, Starter and Finisher phase using commonly available feed ingredients. Results of the study showed that the average weekly body weight change (g/ bird), weekly gain in weight and total gain were significantly higher (P<0.05) in synbiotic, i.e., T3 group as compared to the other groups. The total gain in weight during the entire experimental trial was 1669.46±33.46, 1724.219±33.14, 1770.173±38.50 and 1827.952±40.36 (g/bird) for T0, T1, T2 and T3 groups respectively. The feed intake did not differ significantly among the groups. However, significantly better (P<0.05) FCR was observed in T3, followed by T2, T1 and T0. The Broiler Performance Efficiency Index (BPEI) among the experimental groups was 91.06±0.05, 98.67±0.05, 104.66±0.04and 109.88±0.05for T0, T1, T2 and T3 group, respectively; where T3 showed the best (P<0.05) BPEI followed by T2, T1 and T0.The retention of Nitrogen differed significantly among the groups, with T3 showing better results as compared to the other groups. However, Retention of Phosphorus and Calcium did not differ significantly among the groups. The serum total protein, albumin, globulin, superoxide dismutase and GGT did not show any significant effect among the treatment groups, however serum cholesterol was lowest (P<0.05) in T3 group as compared to the other groups. The dressing percentage, prime cuts, giblet weights, lymphoid organs weight did not differ significantly among the groups. Caecal microbial profile showed that Lactic acid bacteria was increased significantly in the prebiotic and probiotic supplemented groups, whereas E. coli count did not show any significant effect among the groups. The net profit per bird was found highest in the T3 group (Rs.20.51), followed by T2 (Rs.16.13), T1 (Rs.12.37) and T0 (Rs.6.54) groups.
  • ThesisItemOpen Access
    EFFECT OF DIETARY SUPPLEMENTATION OF ZINC NANO-PARTICLES ON GROWTH PERFORMANCE OF CROSSBRED CALVES
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2022-01) BARMAN, AJAY; Borah, Lakhyajyoti
    An experiment was conducted to evaluate the effect of dietary supplementation of zinc nano-particles (nano-ZnO) on growth performance, nutrient utilization, serum biochemical parameters and cost per kg weight gain in crossbred calves. A total twenty four crossbred calves of average body weight 91.77±1.90 and about 6-8 months of age were randomly selected and divided into 3 groups (T0, T1 and T2) of 8 nos each. Experimental calves were provided with green roughage, paddy straw and standard concentrate ration supplemented with inorganic zinc @40 mg/kg DMI in T0, nano-zinc oxide @10 mg/kg DMI in T1 and nano-zinc oxide @20 mg/kg DMI in T2. The concentrate ration was prepared as per BIS, 2013 by using conventional feed ingredients viz. maize, wheat bran, rice polish, GNC, MOC, mineral mixture and salt. The feeding trial was carried out for 84 days. Blood collection was done at 0, 42nd and 84th day for blood biochemical parameter estimation. Humoral immune and cellular immune responses were observed during the end days of the trails. At the end of the feeding trial metabolic trials was conducted for 5 days with 5 animals from each group. The feed intake in crossbred calves was not affected due to the supplementation of nano-ZnO. However, the total body weight gain and average daily gain were significantly (P<0.01) higher in the nano-ZnO supplemented groups than the inorganic zinc supplemented group. Feed conversion ratio was significantly (P<0.01) better in the groups supplemented with nano-ZnO i.e. T1 and T2 compared to the T0. No significant difference was observed among the groups in respect of digestibility coefficient of the DM, OM, CP, EE, CF, NFE, ADF, NDF and retention percentages of nitrogen, calcium and phosphorus. The percent CP and TDN received (as per ICAR, 2013) were comparable among the groups. The haematological parameters viz. serum cholesterol, serum triglycerides, serum creatinine, serum gamma glutamyl transferes, serum albumin: globulin were not significantly affected by supplementation of nano-ZnO. But, superoxide dismutase was significantly (P<0.01) higher in the groups supplemented with nano-ZnO compared to the inorganic zinc supplemented group. Significantly better humoral immunity and cell mediated immunity response was observed in T1 and T2 groups than the T0 group. The relative feed cost per kg weight gain was low in the T2 than other groups. The present study revealed that the supplementation of nano-ZnO up to 20 mg/kg in calf ration is beneficial in terms of body weight gain, feed conversion ratio, immune response and economics of feeding.
  • ThesisItemOpen Access
    EFFECT OF FEEDING NANO-IRON ON GROWTH PERFORMANCE AND NUTRIENT UTILIZATION IN GROWER PIGS
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2022-01) MORUNG, DANGSHAWA; Saikia, B. N.
    An experiment was conducted to investigate the effect of feeding nano-Fe on growth performance and nutrient utilization in grower pigs. Twenty four (N=24) weaned pigs of HDK-75 having average body weight 21.50±0.38 kg of above two months of age irrespective of sex were selected from AICRP pig farm, College of Veterinary Science, Khanapara, Guwahati-22. Selected pigs were randomly allotted in four treatment groups, each group with 6 pigs on body weight basis. The treatment groups were T0 (Control), T1 (100 mg inorganic iron as FeSO4), T2 (75 mg organic iron as methio-chelated) and T3 (50 mg nano iron as FePO4). The basal diet was prepared according to NRC (2012) recommendation for grower pigs. The feeding trial was conducted for 90 days. Result of the study showed that in average fortnightly body weight change, significant difference (P0.05) among the different treatment groups. However, FCR showed significant difference (P0.05) observed for platelet, WBC, lymphocyte, monocyte and granulocyte count. In blood biochemical parameters, serum protein and serum iron was found significantly (P0.05) observed for blood glucose, albumin, globulin, A: G, AST, ALT and BUN but all the values were found within normal physiological range in the present study, thus supplementation of nano-Fe @ 50mg per kg of diet improves overall growth performance of experimental pig (HDK- 75) without adverse effect.
  • ThesisItemOpen Access
    EFFECT OF DIETARY SUPPLEMENTATION OF CYSTEINE-PROTEASE AND 1,4-β-XYLANASE AND THEIR COMBINATION IN LOW PLANE OF NUTRITION ON GROWTH PERFORMANCE OF COMMERCIAL BROILER CHICKEN
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2021-12) ALI, MOKADESH; Saikia, Gunaram
    An experiment was conducted to study the effect of dietary supplementation of cysteine- protease and 1,4-β-xylanase and their combination in low plane of nutrition on growth, nutrient utilization, blood biochemical profile, carcass characteristics and to evaluate economics of feeding in commercial broiler chicken. One hundred sixty (N=160) commercial broiler chicks (Vencobb 400) were randomly distributed into 4 groups (T0, T1, T2 and T3) on live weight basis comprising of 40 chicks in each group with four replicates of 10 chicks in each. The control group (T0) was fed with a standard pre-starter, starter and finisher broiler ration as per ICAR (2013) specifications. The chicks belong to group (T1) was fed with standard ration but supplemented with cysteine-protease (32500 PU/kg of feed) and 1,4-β-xylanase (16000 BXU/kg of feed) as per recommended dose of manufacturer. Birds belong to group T2 and T3 were fed rations with 4 and 6 percent lower crude protein (CP) and metabolizable energy (ME) content than ICAR (2013) specifications, respectively with supplementation of both cysteine-protease (32500 PU/kg of feed) and 1,4-β-xylanase (16000 BXU/kg of feed) in all pre-starter, starter and finisher phases. At the end of pre-starter, starter and finisher phases blood samples were collected and analysed for blood biochemical parameters. Four birds from each group were slaughtered to study the carcass characteristics and chemical composition of meat. The economics of feeding and broiler production were evaluated. Highly significant (p0.05) differences were observed in total feed intake, retention of calcium and phosphorus, dressing percentage, yield of prime cuts, yield of lymphoid organs, chemical composition of meat, serum total protein, albumin, globulin and gamma glutamyl transferase level. Cost of production when calculated revealed that supplementation of cysteine-protease and 1, 4-β-xylanase in broiler rations was more profitable than feeding diets without enzymes. The highest gross profit was observed in group T1 receiving standard rations as per ICAR (2013) specifications supplemented with cysteine-protease and 1, 4-β-xylanase. Hence, the study indicated that broilers could be reared more economically and profitably on broiler rations supplemented with cysteine-protease and 1, 4-β-xylanase.
  • ThesisItemOpen Access
    EFFECT OF SUPPLEMENTATION OF ACIDIFIER ON THE PERFORMANCE OF BROILER CHICKEN
    (College of Veterinary Science, Assam Agricultural University, Khanapara, Guwahati, 2022-02) DUTTA, RUPJYOTI; Bhuyan, Robin
    One hundred twenty day old broiler chick of uniform body weight were divided into 4 different groups of 15 chick each viz. T0, T1, T2 and T3. Birds in all group were offered broiler starter (CP 21.5% and 3056 ME Kcal) and broiler finisher (CP 19.5% and 3100 ME/kg diet) from 0-21 days and from 22-42 days of age respectively. No acidifier was added in the diet of T1 group i.e. control group. The other three groups were fed acidifier in the diet @ 0.1% At the end of 6th week, the average body weight was 2168.37, 2209.17, 2107.53 and 1883.57 and the average total body weight gain was 1906.20, 2154.90, 2029.20 and 1821.30 for T0, T1, T2 and T3 group respectively. The average daily gain was 49.86, 51.31, 48.31 and 43.36 for T0, T1, T2 and T3 groups respectively. The average total feed intake was 3447.82, 3544.42, 3627.23 and 3560.33 and the average feed conversion was 1.73, 1.65, 1.78 and 1.97 for T0, T1, T2 and T3 group. The average weekly protein efficiency rate was 2.99, 3.15, 2.94 and 2.62 for T0, T1, T2 and T3 group. The percentage of retention of nitrogen was 69.21, 70.46, 69.08 and 69.19 calcium was 62.72, 62.57, 61.46, 60.46 and phosphorous was 48.01, 49.19, 49.19 and 50.01 for T0, T1, T2 and T3 group. The average dressing percentage was 73.71, 74.19, 73.40 and 68.45 and total giblet weight percentage were 3.12, 3.06, 3.16 and 3.17 for T0, T1, T2 and T3 group respectively. Meat compositions showed that moisture percentage was 73.62, 73.35, 74.32 and 74.80 for T0, T1, T2 and T3 group respectively. The protein and fat percentage in meat was 18.84, 19.26, 18.82, 17.08 and 6.34, 6.62, 6.28 and 6.04 and 0.75, 0.80, 0.79, 0.74 for ash. Overall mean concentrations of serum protein, blood glucose level, serum calcium and serum inorganic phosphorous was 3.84, 3.87, 3.78, 3.75, 188.62, 187.46, 184.14, 184.78, 5.22, 6.88, 6.62, 6.58 and 5.43, 5.55, 5.50, 5.63 respectively. The cost of feeding per kg body weight gain was Rs. 62.16, 58.16, 60.92, 70.21. The cost of feed was cheaper in T1 and T2 as compared to T0 and T3 group. On the basis of the above results of the present study it can be concluded that supplementation of acidifier in broiler diet with normal protein and energy diet as per (ICAR 2013) is advantageous for broiler production.
  • ThesisItemOpen Access
    GROWTH PERFORMANCE AND NUTRIENT UTILIZATION OF CROSSBRED CALVES ON FEEDING OF PADDY AND STOVER BASED FEED BLOCK
    (College of Veterinary Science, Assam Agricultural University Khanapara, Guwahati-781022, 2016-07) Terangpi, Sangmirlin; Bhuyan, R.
    Eighteen male cross bred calves of about 9 to 10 months of age weighing average 72.2 kg body weight were randomly distributed into three treatment groups as T1, T2 and T3 respectively with 6 animals in each group by using randomized block design (RBD). T1 was fed with 100% paddy stover, concentrate mixture in the ratio 60:40 and green roughage as total mixed ration (TMR), T2 was fed with feed block consisting of 100% paddy stover, concentrate mixture and molasses in the ratio 60:30:10 and green roughage separately and T3 was fed with feed block consisting of 50% paddy stover, 50% paddy straw, concentrate mixture and molasses in the ratio 60:30:10 and green roughage separately. The three treatment groups were fed the same concentrate mixture containing 17.07 per cent DCP and 79.04 percent TDN for 90 days. Towards the end of the experiment a metabolism trial was conducted for 5 days. The average daily gain and FCE of different treatment groups were 94.44±3.18, 140.0±1.07 and 250.4±2.38 g; 19.32±0.74, 14.46±0.18 and 8.69±0.16 in T1, T2 and T3 groups respectively. Highly significant (P<0.001) difference were observed among the treatment groups in respect of gain per day and FCE. DM intake was highest in T3 followed by T2 and T1 (P<0.001). Digestibility coefficient of OM, CP and NDF were higher in T2 and T3 groups when compared with T1 (P<0.01). The digestibility coefficient of DM, CF and ADF in T2 and T3 higher (P<0.01) when compared with T1, however, no significant difference were observed between T2 and T3 groups. Digestibility coefficient of NFE was highest in T3 and lowest in T1 group (P<0.05) but no significant difference was observed between T1 and T2 and T2 and T3 groups. The EE digestibility were 62.99% in T1 and 67.91% in T3 and differences were non significant (P>0.05). All the animals of different treatment groups were in positive nitrogen, calcium and phosphorus balance. The blood constituent viz. serum glucose, serum total protein, serum albumin, serum globulin were within the normal range for crossbred calves but were highest in T3 followed by T2 and T1 (P<0.001). The serum cholesterol level was highest in T1 (P<0.001). The albumin/globulin ratio which was non significant (P>0.05) among the treatment groups. Plane of nutrition revealed that protein and energy received by the different treatment groups of animals (T1, T2 and T3) were adequate for maintenance on the basis of metabolic body weight. The cost per kg gain in body weight was lowest (Rs. 91.96) in T3 group in comparison to T1 (Rs. 133.40) and T2 (Rs. 137.42). The result suggested that crossbred calves can be reared on feeding of complete feed block having 50% paddy straw, 50% paddy stover (out of 60% roughage) and concentrate with molasses in the ratio 60:30:10, plus ad lib green roughage with economic advantage.