Abstract

This study was conducted on laying hens (hubbard), to investigate the effects of some antioxidants on physiological and reproductive performance. One day old birds were reared on standard ration till age 8 weeks, then divided into 4 groups (60 birds / group). 1^stgroup (control) reared on standard ration, 2^nd group reared on standard ration supplemented with Vit. C (300 mg / kg ration), 3^rd group reared on standard ration supplemented with Vit. E (600 mg / kg ration), and 4^th group reared on standard ration supplemented with methionine (450 mg / kg ration). Blood and tissues samples were collected at the end of the experiment.Results revealed that the antioxidants treatment decreased significantly (P ≤ 0.05) glucose, cholesterol triglycerides, AST, ALT serum levels of laying hens, also improved antioxidant status represented in the increase of GSH level, and decrease MDA level significantly in liver tissue. Also, a significant decrease in liver weight % and liver fat % as compared with control group. Also, a significant increase in ovary weight and oviduct weight and length compared with control. Treatment was observed antioxidant showed also had a significant effect on sexual maturity, 1^st egg weight, the weight of the 1^st 10 eggs, the time needed to produce the 1^st 10 eggs and improvement egg production %. In conclusion, antioxidants improved the physiological and reproductive performances.