长期饲喂高硒和中草药饲粮对蛋鸡组织硒含量及血液抗氧化性能的影响

Effects of Long-Term Feeding of High Selenium and Herbal Diets on Tissue Selenium Content and Blood Antioxidant Properties of Laying Hens

研究旨在通过长期饲喂高硒和中草药饲粮,探讨生产富硒鸡产品的可行性。试验将360只299日龄正大褐产蛋鸡分为4组,A组为空白组,饲料中含硒0.30 mg/kg(低硒);B、C、D组为试验组,B、C组分别含硒0.80(中硒)、1.30(高硒)mg/kg;D组在C组基础上添加0.2%中草药。试验170 d后,采集组织和血样测定硒含量和抗氧化指标。结果表明:C组蛋重显著低于A、B组(P<0.05),各组间其他生产性能指标无显著差异(P>0.05);B、C、D组胸肌、肾脏硒含量极显著高于A组(P<0.01),C、D组肝脏硒含量极显著高于A、B组(P<0.01),D组肝脏、肾脏硒含量极显著高于C组(P<0.01);B、C、D组血液谷胱甘肽过氧化物酶(GSH-Px)活性和总超氧化物歧化酶(T-SOD)活性均极显著高于A组(P<0.01),C、D组极显著高于B组(P<0.01),D组极显著高于C组(P<0.01);B、C、D组血液丙二醛含量极显著低于A组(P<0.01)。说明长期饲喂高硒(0.8~1.3 mg/kg)饲粮,不会产生硒的富集效应,可生产富硒鸡肉产品。

The aim of this study was to investigate the feasibility of producing selenium-rich chicken products by long-term feeding of high selenium and herbal rations.Three hundred and sixty 299-day-old Zhengda brown laying hens were divided into four groups:group A was a blank group with 0.30 mg/kg(low selenium)in the diet;groups B,C and D were experimental groups with 0.80(medium selenium)and 1.30(high selenium)mg/kg of selenium in groups B and C,respectively;group D was supplemented with 0.2%Chinese herbal medicine on top of group C.After 170 d of the experiment,tissue and blood samples were collected to determine the selenium content and antioxidant index.The results showed that:the egg weight of group C was significantly lower than that of groups A and B(P<0.05),and there were no significant differences in other productive indexes among all groups.The selenium poles of pectoral muscle and kidney were significantly higher in groups B,C and D than in group A(P<0.01),the selenium poles of liver were significantly higher in groups C and D than in groups A and B(P<0.01),and the selenium poles of liver and kidney were significantly higher in group D than in group C(P<0.01);the blood glutathione peroxidase(GSHPx)and total superoxide dismutase(T-SOD)activities in groups B,C and D were extremely significantly higher than those in group A(P<0.01),groups C and D were extremely significantly higher than those in group B(P<0.01),and glutathione peroxidase in group D was extremely significantly higher than that in group C(P<0.01);blood malondialdehyde levels in groups B,C and D were extremely significantly lower than those in group A(P<0.01).It indicated that long-term feeding of high selenium(0.80-1.30 mg/kg)rations without selenium enrichment effect,and can produce selenium-rich chicken meat products.