PERFORMANCE, SOME PHYSIOLOGICAL AND IMMUNOLOGICAL RESPONSES TO HEAT STRESS IN BROILER CHICKENS FED ON DIETS CONTAINING BETAINE - ANDIOR SODIUM BICARBONATE | ||||
| Journal of Animal and Poultry Production | ||||
| Article 7, Volume 29, Issue 5, May 2004, Page 2321-2334 PDF (822.88 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2004.239163 | ||||
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| Author | ||||
| Sabria B. Abou El-Soud, | ||||
| Department of Poultry Production, Faculty of Agrlculture-Kafr EI- Sheikh, Tanta University | ||||
| Abstract | ||||
| An experiment was conducted to study the performance, some physiological and immunological responses to heat stress in broiler chickens fed on diets containing" 1% betaine andlor 0.5% sodium bicarbonate. A total number of 180 broiler chickens at one-day of age were used. Birds were divided to 4 equal groups that were randomly allotted to one of the following four treatments 1) basel diet supplemented with 0.5% sodium bicarbonate, 2) basel diet supplemented with 0.5% sodium bicarbonate and 1% betaine, 3) basel diet supplemented with 1% betaine, and 4) basel diet without any supplements served as control. The birds were subjected to high ambient temperature (40°C±1°C) for 6 hrs per day from the 2Slti day up to the end of the experimental period (49 days of age). The results could be summarized as follows: .Significant (P<O.01) increases in final body weight and total body weight gain were detected in the birds fed diet supplemented with 1 % betaine compared with the control group . A significant (P<O.OO 1) improvement In feed conversion was observed in the birds fed diet supplemented with 0.5% sodium bicarbcnate compared with the control group . A significant decrease (P<0.01) in water consurnptlon was observed in the experimental grcup fed diel supplemented with 1 % betaine compared with the control qroup. ,Significant decreases (P<O.O~) in rectal temperature and blood pH were detected for birds fed diet supplemented with 0.5% sodium bicarbonate and 1 % betaine and the birds fed diet supplemented with 1% betaine compared with the control group. ·Significant increase (P<0.01 and P<0.05) in bursa of fabricius and adrenal gland weight index was observed in all experimental groups fed supplemental diets compared with the control group . Significant increases (P<O.001 and P<O.05) in antibody titer and T4, T31evels were observed in the group of birds fed diet supplemented with 0.5% sodium bicarbonate and 1% betaine compared with the control group . Significant decreases (P<0.05 and P<O.001) in H/L ratio, cholesterol, AST, ALT, total protein, albumin and globulin levels were observed in the experimental groups fed diets supplemented with 0.5% sodium bicarbonate and 1% betaine and the diet supplemented with 1 % betaine compared with the control group. | ||||
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