Effects of Organic Selenium Sources on Growth Performance and Anti Oxidative Capacity in Weaned Piglets

[Objective] The aim was to evaluate effects of organic selenium sources on growth performanceand anti oxidative capacity in weaned piglets.[Method] A total of 24 weaned piglets(Duroc×Landrace×Yorkshire)with body weight of 15 kg were allotted to the 3 groups,of which 2 were assigned for test groups,and one served as control.Two different selenium(Se)sources namely selenium-enriched yeast and sodium selenite were respectively supplemented to 2 test groups with the dose of selenium of 0.3 mg/kg.[Result]①Weaned piglets growth performance have not been significantly enhanced by selenium-enriched yeast.②In the experiment 30 and 60 d,the blood GPX activity,the blood Se concentration and serum SOD activity in 2 test groups were significantly or very significantly higher than control group;serum MDA level in 2 test groups were very significantly lower than control group.③Selenium contents of muscles,kidney and liver in 2 test groups were very significantly higher than control group.[Conclusion] Antioxidant capacity of organic selenium was better than inorganic selenium,it was necessary to use organic selenium to instead of inorganic selenium as selenium supplements.