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低蛋白质平衡氨基酸饲粮对生长猪生长性能、胴体品质及肠道健康的影响

DOI: 10.3969/j.issn.1006-267x.2012.12.006

Keywords: 生长猪,低蛋白质平衡氨基酸饲粮,胴体品质,肠道健康

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Abstract:

本文旨在研究低蛋白质平衡氨基酸饲粮对生长猪生长性能、胴体品质、肌肉品质和肠道健康的影响。试验采用单因素完全随机设计,选择初始体重为(17.02±1.40)kg的健康"杜×长×大"三元杂交去势公猪16头,随机分为正常蛋白质组(饲粮粗蛋白质水平为18%,标准回肠可消化赖氨酸含量为0.93%)和低蛋白质组(饲粮粗蛋白质水平为14%,标准回肠可消化赖氨酸含量为1.03%)2个组,每组8个重复,每个重复1头猪。试验期共39d。在试验结束当天对生长猪进行称重、结料和采血,并屠宰所有生长猪用于测定胴体品质、肌肉品质、肠道形态及消化酶活性。结果表明:与正常蛋白质饲粮相比,低蛋白质平衡氨基酸饲粮显著提高了生长猪背最长肌的亮度值(P<0.01)和黄度值(P<0.05);对小肠各肠段的绒毛形态无显著影响(P>0.05),但有提高空肠绒毛高度和隐窝深度比值的趋势(P=0.09);对生长猪的生长性能、胴体品质和肌肉品质无显著影响(P>0.05)。本试验结果表明,与正常蛋白质饲粮相比,标准回肠可消化赖氨酸含量为1.03%的低蛋白质平衡氨基酸饲粮能够维持生长猪正常生长性能,并有改善肠道健康状况的趋势。

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