Abstract: The research was conducted to study the influence of different doses of grape seed powder replacing for corn on weight and economic benefi of adult ewes. 32 adult sheep with similar age (15 to 16 months) and in good health were randomly divided into 4 groups according to the principle of similar weight. The control group was fed the basal diet, the testⅠ,Ⅱ and Ⅲ groups added different doses of grape seed powder replacing for 7%, 14% and 21% corn in the basal diet. The results showed that the test Ⅰ,Ⅱ and Ⅲ groups were no significantly difference compared with the control group in weight gain (P＞0.05), the average weight of test Ⅰ group increased 14.50%, and the economic benefit of test Ⅰ group increased 37.74%. In short, adding grape seed powder replacing for 7% corn in the basal diet was the best for weight gain and economic efficiency of adult sheep in this research.

Key words: grape seed powder; adult ewe; weight gain; feed conversion ratio; economic efficiency