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饲料铅污染对蛋鸡生产性能、蛋品质以及抗氧化性能的影响

DOI: 10.3969/j.issn.1006-267x.2012.03.021

Keywords: ,蛋鸡,生产性能,蛋品质,抗氧化性能

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Abstract:

本试验旨在研究不同剂量铅对蛋鸡生产性能、蛋品质以及血清、肝脏和肾脏中与抗氧化性能相关指标的影响。选用40周龄生产性能相近的海兰褐蛋鸡576羽,随机分为4组:对照组、试验1组(T1组)、试验2组(T2组)、试验3组(T3组),每组4个重复,每个重复36羽。对照组饲喂基础饲粮,T1、T2、T3组分别饲喂在基础饲粮中添加15、30、60mg/kg铅的试验饲粮。试验期8周。结果表明:1)各组间产蛋率和料蛋比均无显著差异(P>0.05),1~8周T3组平均蛋重显著低于对照组(P<0.05),1~8周T1、T2、T3组平均日采食量分别较对照组降低了3.72%(P<0.05)、1.93%(P>0.05)、3.63%(P<0.05)。2)与对照组相比,试验组蛋白高度和哈夫单位均有降低趋势,除T3组蛋白高度(P<0.05)外均差异不显著(P>0.05);T3组蛋壳强度和蛋壳厚度最低,第4周和第8周时T3组蛋壳强度分别比对照组降低了21.89%、16.84%(P<0.05);蛋壳厚度的变化趋势与蛋壳强度一致,均随着铅添加量的增加而降低,呈现一定的剂量-效应关系。3)与对照组相比,各试验组血清、肝脏和肾脏中谷胱甘肽过氧化物酶活性均显著降低(P<0.05);丙二醛(MDA)含量均在一定程度上升高,T3组血清和肝脏中MDA含量均较对照组显著上升(P<0.05),各试验组肾脏中MDA含量均显著高于对照组(P<0.05);血清、肝脏和肾脏中还原型谷胱甘肽含量和总抗氧化能力以及总超氧化物歧化酶活性均呈现降低趋势。综上所述,饲料中铅污染可以导致蛋品质降低,诱导脂质过氧化作用,降低蛋鸡抗氧化能力。

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