Abstract
This experiment was conducted at Animal Production Department Farm /College of Agriculture. University of Mosul.. to study the effect of adding different levels of vitamin E (0 . 75 . 150 and 350 )mg / liter to drinking water on productive performance of broiler. The data showed that the addition of vit. E resulted in significant increase (P< 0.05) in body weight. weight gain. feed conversion ratio in the 7 week . weight of liver and dressing percentage . weight of thigh. breast. The result revealed that supplementation of vitamin E significantly (P< 0.05) decreased feed intake and mortality in comparison with control group. It was concluded that vitamin E at the rate of 150 to 350 mg /liter of drinking water surpassed other levels with regards to the characteristics measured surpassed on productive performance and immune resporse of broiler.
