Dept. of Animal Nutrition, Genetics & Breeding
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Item AMMONIA EMISSION FROM OPEN SIDED BROILER HOUSES WITH DIFFERENT REARING SYSTEMS AND ITS IMPACT ON BROILER PRODUCTION(DEPARTMENT OF ANIMAL NUTRITION, GENETICS AND BREEDING, SHER-E-BANGLA AGRICULTURAL UNIVERSITY, DHAKA -1207, 2021-06) HAQUE, S. M. EMDADULThe demand for poultry products in Bangladesh has grown significantly. Poultry sector needs to increase significantly to meet the growing domestic demand. However, atmospheric ammonia inhibits broiler performance. Therefore, a study was planned to investigate the effects of ammonia emission from different types of broiler houses and its impact on productivity. A total of 135 day-old Lohmann broiler chicks were reared at SAU Poultry Farm, Dhaka-1207. Chicks were divided randomly into 3 experimental groups of 3 replications R 1 , R 2 and R 3 , where each replication contains 15 birds. These three treatment groups were designated as T 0 indicated without ceiling fan. Whereas T 1 , T 1 and T 2 and T 2 . T 0 was control group which were ceiling fan and ceiling fan with exhaust fan, respectively. Results demonstrated that the average ammonia level was same at the end of 1 st week, however it varied significantly (P<0.05) at the end of 2 , 3 rd and 4 th week. The control group (T 0 ) indicated the highest ammonia emissions at the end of 2 nd , 3 rd and 4 th week and T 2 showed the lowest ammonia emissions at the end of 2 nd , 3 rd and 4 th week. At the end of 4 th week significantly (P<0.05) higher emissions of ammonia was found in control group T 0 (11.63 a ±0.17 ppm) and lower was found in treated group T 2 (6.53 c ±0.14 ppm). BWG (Body Weight Gain), BW (Body Weight) and FCR at the end of 4 th week were insignificant (P>0.05) in different group, however better BWG, BW and FCR were found in treated group T 2 (BWG 1812.33±26.82 gm, BW 1852.76±26.82 gm, FCR 1.31±0.04). Dressing percentage was non significantly (P>0.05) higher in T 1 (65.10±1.05) and T 2 (65.72±0.35) than control group T 0 (64.33±0.48). The weight of spleen and gizzard in exhaust fan treated group T 2 was significantly higher (P<0.05) than control group (T 0 ). The weight of thigh, drumstick and back in exhaust fan treated group T 2 was non significantly higher (P>0.05) than control group (T 0 ). Survivability rate (%) of the chicken was significantly higher (P<0.05) in T 2 and T 1 group than control group (T 0 ). In case of cost benefit ratio analysis, BCR was significantly (P<0.05) higher in treatment group T 1 T 2 (1.35±0.01) than T 0 (1.35±0.01) (1.30±0.02). Therefore, the research recommended that poultry house with exhaust fan at bird’s level could be used on broiler production for better performance and profitability. nd and