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Effect of Methionine and Vitamin E Supplementation in the ration on productive performance of broiler chickens reared under Thermal stress | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 13, Issue 0, 2013, Pages 64-72 | ||
| Abstract | ||
| This study was conducted in the chicken field - Animal Resources Department - College of Agriculture and Forestry - University of Mosul, for the period (56 days) from the 1st of September to the 27th of October 2010, The objective of the study was to evaluate effects of methionine or vitamin E supplementation to reduce the heat stress effect in the broiler reared under high temperature and its reflection on productive performance.Three hundred and sixty one day old chickens were reared normally until 21 days of age - at age of 22 days, the chickens were weighted and randomly distributed into 4 treatments (3 replicates, 30 birds each). Chicks In the four groups were exposed to an cyclic artificial temperature of (25-36-25)C°. and treated as follows :Treatment 1: (control) (heat stress) ,Treatment 2: (heat stress, adding 1g methionine/Kg feed) ,Treatment 3: (heat stress, adding 0.6g vitamin E/Kg feed) ,Treatment 4: (heat stress, adding 1g methionine + 0.6g vitamin E/Kg feed). The results showed the following:treatment (4) causes a significant increase (p0.05) in live body weight at wks (5,6 and 7) as compared with other treatment ,and a significant increase in weight gain increment at wks (4,5 and 7) and in the total period ,also in the relative growth rate at the wks (4 and 5) and the total period, also in the breast weight as compared with treatment (1),No significant effects in food consumption, feed conversion ratio ,dressing percentage and mortality percentage | ||
| Keywords | ||
| Heat stress; broiler; Vit | ||
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