Abstract: To investigate the effects of three forms of zinc sources on the antioxidation ability of weaning mice. Eighty-one weaning mice (KM) were allotted at random into 3 groups. In the first week, the mice were fed on the basal diet lack of zinc. Then the mice of group 1 were fed with zinc in zinc sulfate(ZnSO4), group 2 and 3 were supplemented respectively, with zinc in zinc- leucine (Zn-Leu) and zinc-methionine (Zn-Met). The serum and liver zinc contents were increased for the supply of three forms of zinc. The MDA (malondialdehyde) concentration was decreased when mice were supplemented with zinc but showed no significant difference for three different zinc sources(p>0.05). After 7 days of supplement with zinc, T-AOC,T-SOD, CuZn- SOD and GSH were all increased by zinc supplementation. There was difference between group 2,3 and group 1(p<0.05). Zn- Leu and Zn-Met improve the capability of antioxidtion more effectively than ZnSO4, but there is no significant difference in the capability of antioxidtion between the zinc chelated amino acid groups themselves.

Key words: zinc sulfate, zinc-leucine, zinc-methionine, antioxidation