| 饲料中镉对产蛋鸡生产性能、抗氧化功能及其体内残留的影响 |
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| 引用本文： | 孙涛,代腊,唐飞江,谢鹏,邹晓庭.饲料中镉对产蛋鸡生产性能、抗氧化功能及其体内残留的影响[J].畜牧兽医学报,2012,43(2):232-241. |
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| 作者姓名： | 孙涛 代腊 唐飞江 谢鹏 邹晓庭 |
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| 作者单位： | 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,杭州,310029 |
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| 基金项目： | 现代农业产业技术体系建设专项资金 |
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| 摘 要： | 为研究日粮中低剂量镉对蛋鸡生产性能、抗氧化功能以及其在体内沉积的影响,将192羽巴布考克B300蛋鸡随机分为4组,每组3个重复,每重复16羽.对照组饲喂玉米-豆粕型基础日粮,试验组日粮为基础日粮中分别添加5、10和20 mg·kg-1的镉(氯化镉形式,CdCl2·2.5H2O),试验期9周.结果表明:1)在1～3、4～6和7～9周,试验组的产蛋率和日采食量均低于对照组,但差异不显著(P＞0.05)；各组在第7～9周时的采食量显著低于1～3周,分别下降了5.89％ (P＜0.05)、6.77％ (P＜0.05)、9.61％ (P＜0.05)和12.71％ (P＜0.05)；从整个试验期(1～9周)来看,产蛋率变化相对明显,试验组产蛋率比对照组分别下降了1.86％、2.27％和2.68％,但其差异不显著(P＞0.05),平均蛋质量、日采食量和料蛋比也无显著差异(P＞0.05)；2)镉添加量越高,鸡蛋中镉含量越高,各组差异显著(P＜0.05),但均低于30μg·kg-,且蛋黄中镉含量高于蛋清；3)饲料中加镉后,各组间肾脏、肝脏及卵巢中镉含量差异显著,肾脏中镉含量最高,肝脏次之,卵巢中含镉较少,20 mg·kg-1组的肾镉含量可达0.261 mg·kg-1；4)血清MDA含量试验组显著高于对照组,分别比对照组高出1.47、2.24和2.68倍(P＜0.05)；试验组的总SOD和CuZn-SOD活力均低于对照组,分别比对照组下降了8.30％ (P＞0.05)、7.29％ (P＞0.05)、16.92％ (P＜0.05)和11.61％ (P＜0.05)、14.94％ (P＜0.05)和16.37％(P＜0.05)；血清NO含量试验组比对照组分别升高了11.19％ (P＞0.05)、26.72％(P＜0.05)和46.68％ (P＜0.05).试验结果证实了镉可逐渐蓄积在体内,并通过氧化损伤等途径来影响蛋鸡健康,导致其生产性能下降.
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| 关 键 词： | 镉 蛋鸡 生产性能 沉积 抗氧化 |
Effects of Dietary Cadmium on Production Performance, Antioxidative Capacity and the Retention of Laying Hens |
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| SUN Tao
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DAI La
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TANG Fei-jiang
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XIE Peng
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ZOU Xiao-ting.Effects of Dietary Cadmium on Production Performance, Antioxidative Capacity and the Retention of Laying Hens[J].Acta Veterinaria et Zootechnica Sinica,2012,43(2):232-241. |
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| Authors: | SUN Tao DAI La TANG Fei-jiang XIE Peng ZOU Xiao-ting |
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| Institution: | (Key Laboratory for Molecular Animal Nutrition of Ministry of Education,Institute of Feed Science,Zhejiang University,Hangzhou 310029,China) |
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| Abstract: | This experiment was conducted to investigate the effects of dietary cadmium on production performance,antioxidative capacity and the retention in laying hens.One hundred and ninety two 40-week-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 diet of experimental groups was the addition of cadmium(CdCl2·2.5H2O) for 5,10 and 20 mg·kg-1,respectively into basal diet.The experiment lasted for 9 weeks.The results showed that: 1) In 1-3,4-6 and 7-9 weeks,the laying rate,ADFI of three experiment groups were lower than that of control group,but the differences were not significant;In 7-9 weeks,the ADFI of all groups were lower than that in 1-3 weeks and decreased by 5.89%,6.77%,9.61% and 12.71%(P<0.05),respectively;during the experiment period(1-9 weeks),laying rate of experiment groups were lower than control group and decreased by 1.86%,2.27% and 2.68%(P>0.05),respectively,the differences of average egg weight,ADFI and feed-egg ratio were also not significant(P>0.05) between the two periods;2) Cadmium content in eggs increased with the cadmium-added level increased,and the differences among different groups were significant(P<0.05),but the all values less than 30 μg·kg-1,and the cadmium in yolk is higher than that in egg white;3) After cadmium added,differences of the content of cadmium in liver,kidneys and ovary among different groups were significant(P<0.05),the content of cadmium from high to low is kidneys,liver,ovary,and the concentration of cadmium in kidneys of 20 mg·kg-1 group could reach to 0.261 mg·kg-1;4) MDA content in serum in experiment groups were significantly higher than that in control group and were 1.47,2.24 and 2.68 times,respectively more than that of control group;activity of total SOD and CuZn-SOD of experiment groups significantly lower than that of control group and decreased by 8.30%(P>0.05),7.29%(P>0.05),16.92%(P<0.05) and 11.61%,14.94%,16.37%(P<0.05),respectively;NO content in serum in experiment groups were decreased by 11.19%(P>0.05),26.72%(P>0.05) and 46.68%(P<0.05),respectively compared to the control group.These results indicate that cadmium can accumulate in organisms and injury the body through oxidant stress,consequently lead to recession of production performance of laying hens. |
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| Keywords: | cadmium laying hens production performance accumulation antioxidation |
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