Effects of extractive of Lespedeza davurica on reproductive performance and antioxidant indices of broiler chickens | 达乌里胡枝子提取物对肉仔鸡生产性能及抗氧化指标的影响

Chinese. 研究饲粮中添加达乌里胡枝子提取物（Extractive of Lespedeza davurica，LDE）对肉仔鸡生产性能及抗氧化能力的影响。将350 只健康1 日龄商品代Avian肉仔鸡随机分为7 组，每组5个重复，对照组（CK）饲喂基础日粮，1～3 组饲喂基础日粮添加达乌里胡枝子乙酸乙酯萃取物 20，30，40 mg/kg；4～6 组饲喂基础日粮添加达乌里胡枝子正丁醇萃取物40，50，60 mg/kg。试验期42 d，42日龄时每组取5只鸡采血并取组织器官，测定血清及组织器官的超氧化物歧化酶（T-SOD）、谷胱甘肽还原酶(GR)活性及丙二醛（MDA）含量，并测定日增质量及料肉比。达乌里胡枝子提取物对肉仔鸡的生长性能有改善作用，可以提高肉仔鸡的日增质量，降低料肉比；可增强肉仔鸡血清与心脏中T-SOD 活性，显著增强肝脏和肾脏的T-SOD活性(P0.05)；可增强肉仔鸡血清及肝脏、肾脏中GR活性，除试验1组外，均能显著增强心脏中GR活性(P0.05)；可显著降低肉仔鸡血清、心脏、肝脏和肾脏的MDA含量(P0.05)。达乌里胡枝子提取物对肉仔鸡生产性能有促进作用，可提高肉仔鸡的抗氧化能力。

English. The effects of Lespedeza davurica extractive (LDE) on growth performance and antioxidant indices of broiler chickens were discussed. 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. (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). The LDE has auxoaction in broilers’ performance, and it can elevate antioxidant function of broiler chickens.