饲料中镉含量对蛋鸡生产性能及抗氧化功能的影响  

Effects of Dietary Cadmium on Production Performance and Antioxidant Capacity of Laying Hens

作　　者：代腊[1] 朱莎[1] 孙涛[1] 唐飞江[1] 邹晓庭[1] 

机构地区：[1]浙江大学饲料科学研究所,动物分子营养学教育部重点实验室,浙江杭州310058

出　　处：《中国畜牧杂志》2012年第3期35-40,共6页Chinese Journal of Animal Science

基　　金：现代农业产业技术体系建设专项资金(nycytx-41-g16)

摘　　要：为研究日粮中低剂量镉对蛋鸡生产性能和血清、肝肾抗氧化能力的影响,将192羽巴布考克B300蛋鸡随机分为4组,每组3个重复。对照组饲喂玉米-豆粕型基础日粮,试验组日粮为在基础日粮中分别添加5、10、20 mg/kg的镉(氯化镉形式,CdCl2.2.5H2O),试验期9周。结果表明:在1～3、4～6、7～9周,试验组的产蛋率、日采食量均低于对照组(P>0.05);各组在第7～9周时的采食量显著低于1～3周(P<0.05);血清中GSH-Px、GST、GR酶活力对镉不敏感(P>0.05),随镉添加量升高肝肾中GSH-Px活力先升后降,试验组肝肾中总巯基含量较对照组有显著升高(P<0.05);血清和肝肾中总SOD、CuZn-SOD、CAT活力随镉添加量升高呈先升后降的趋势;血清和肝肾中MDA、NO含量随着镉添加量的升高显著升高(P<0.05),总抗氧化能力均呈下降趋势。试验结果证实,镉可引起产蛋鸡体内抗氧化功能受损,机体产生氧化应激,并可能由此导致蛋鸡的生产性能下降。This experiment was conduct to investigate the effects of low-levels of dietary cadmium on production performance and antioxidative parameters in serum, liver and kidney of laying hens. One hundred and ninety two 40-w- old Babcock B-300 laying hens were randomly divided into four groups with three replicates per group and 16 laying hens per replicate. The diet of control group was a basal corn-soybean meal diet. The experimental diet was supplemented with cadmium （CdC12 ＂2.5H20） 5 mg/kg, 10 mg/kg and 20 mg/kg into basal diet, respectively. The experiment lasted for 9 weeks. The results showed that in 1-3, 4-6 and 7-9 week, the laying rate, ADFI of three trail group were lower than those of control group; in 7-9 week, the ADFI of all groups were lower than that in 1-3 week （P〈0.05）; GSH-Px, GST, GR in serum were not sensitive to the cadmium （P〉0.05）, GSH-Px activity in liver and kidney first increased and then decreased with the added level of cadmium increased; sulfhydryl levels of trail group in liver and kidney were higher than those of control group （P〈0.05）; the activity of total SOD, CuZn-SOD and CAT in serum, liver and kidney declines from 5 mg/kg, 10 mg/kg and 20 mg/kg group; the content of MDA and NO were significantly increased with the cadmium-added level increased （P〈0.05）, while T-AOC significantly decreased. These results indicated that cadmium could cause injury of body antioxidation system and induce oxidant stress of laying hens, consequently lead to a decrease of production performance of laying hens.

关 键 词：镉 生产性能 血清 肝肾 抗氧化 蛋鸡 

分 类 号：S831.5[农业科学—畜牧学]