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۱Culminating the Influence of Heat Stress in Broilers by Supplementing Zinc and Vitamin C
اطلاعات انتشار: World Applied Sciences Journal، سي ام،شماره۸، ۲۰۱۴، سال
تعداد صفحات: ۶
Efficacy of supplementing zinc and vitamin–C in reducing heat stress of broiler chicks was assessed. One hundred and sixty, day–old broiler birds were randomly allotted to four replicated (n 4; 10 birds\replicate) dietary treatments (groups A, B, C and D). Treatment A was control and to other were added Zn (60 mg kg 1, B), vitamin–C (300 mg kg 1, C) and Zn + vitamin–C (D). Birds on deep litter had ad libitum access to feed and water. Heat stress was induced during the finisher phase (22–42 days). Birds in treatment D had better (p0.05) body weight gain and Feed conversion ratio (FCR) comparatively. Feed intake was reduced (p0.05; 2940.44g ± 21.46) in control group. No significant difference was seen in the antibody titer against Newcastle disease (ND), Infectious Bursal disease (IBD) and Infectious Bronchitis (IB) of treated groups and was lowest (p0.05) in group–A. Total leukocyte count (TLC) was significantly reduced however, neutrophil, eosinophil, lymphocyte and monocyte numbers were increased in control group. Difference in the count of these cells among supplemented groups was non significant. Significantly high mortality was observed in control group. It can be concluded from these findings that dietary supplementation of zinc and vitamin C can effectively alleviate the adverse effects of heat stress in meat type chickens.
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