Effects of extractive of Lespedeza davurica on reproductive performance and antioxidant indices of broiler chickens.

【Objective】 The effects of Lespedeza davurica extractive(LDE) on growth performance and antioxidant indices of broiler chickens were discussed.【Method】 A total of 350 1-day healthy Avian broilers of commercial strains were randomly assigned to seven treatments with five replicates.The experimental stage was forty-two days.The control group(CK) was fed basal diet,group 1 to 3 fed basal diet supplemented with 20,30,40 mg/kg of ethyl acetate extractive of LDE,group 4 to 6 fed basal diet supplemented with 40,50,60 mg/kg of n-butanol extractive of LDE.42-day-old broilers were slaughtered for blood,heart,liver and kidney.The antioxidant enzymes and Malondialdehyde(MDA) were measured in serum,heart,liver and kidney.The enzymes included superoxide dismutase(T-SOD),glutathione peroxidase(GR).Daily weight gain and feed conversion ratio were measured,too.【Result】(1) Supplementing different levels of LDE can improve performance of broilers,elevate daily weight gain and improve feed conversion ratio;(2)Supplementing different levels of LDE can enhance T-SOD activity in serum and heart,significantly enhance T-SOD activity in liver and kidney(P0.05);(3)Supplementing different levels of LDE enhances GR activity in serum,liver and kidney,and significantly enhance GR activity in heart(P0.05) except for treatment 1;(4)Supplementing different levels of LDE significantly degrades MDA content in serum,heart,liver and kidney(P0.05).【Conclusion】 The LDE has auxoaction in broilers' performance,and it can elevate antioxidant function of broiler chickens.