类黄酮物质对蛋鸡抗氧化和脂质代谢的影响

目的 :　观察茶多酚 ( TP)和大豆黄酮 ( SD)对蛋鸡抗氧化状况和脂质代谢的影响。方法 :　 2 70只 2 8w褐壳海赛克斯产蛋鸡随机分为 9组 ,第 1组饲喂基础日粮 ,第 2、3、4、5组在基础日粮中分别添加 5、1 0、2 0、40 mg/kg的 TP,6、7、8、9组在基础日粮中分别添加 5、1 0、2 0、40 mg/kg的 SD。试验期 8w。结果 :　 TP或 SD可不同程度地降低蛋黄、肝脏及血浆中脂质过氧化物水平 ,对肝脏的 GSH- Px和 SOD活力影响不明显 ;蛋黄、胸肌及肝脏中的胆固醇也有不同程度地降低 ,特别是对蛋黄和胸肌中胆固醇的影响较为显著 ,对肝脏脂肪含量影响不明显 ,蛋黄甘油三酯含量随 TP添加量的增加逐渐降低。结论 :　 TP和 SD能改善蛋鸡体内及其产品中抗氧化状况 ,对蛋黄和胸肌胆固醇有降低作用。

EFFECT OF FLAVONOIDS ON ANTIOXIDATIVE STATUS AND LIPID METABOLISM OF LAYING HENS

Objective: Dietary effects of tea polyphenols(TP)and soybean daidzin(SD)supplementation on antioxidative status and lipid metabolism were investigated in laying hens during an experimental period of 8 weeks. Methods: Two hundred and seventy Hisex brown laying hens of 28w old were randomly divided into nine groups, fed a basal diet supplemented with 0,5,10,20,40 mg/kg TP and 5,10,20,40 mg/kg SD respectively. Results: Dietary supplementation of TP or SD decreased the lipid peroxide(LPO) level of yolk, liver and plasma differently. No effect was found on the activities of SOD and GSH Px in liver. The concentration of cholesterol in egg yolk, liver and breast muscle decreased after supplementation of TP or SD. The concentration of yolk triglyceride decreased gradually with the increasing supplementation of TP or SD. Conclusion: It suggests that dietary TP or SD supplementation can improve the antioxidative status of laying hens and its eggs, and decrease the cholesterol level in egg yolk and breast muscle.