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一种新型缓释非蛋白氮添加水平对奶山羊泌乳性能及血液生化指标的影响

DOI: 10.3969/j.issn.1006-267x.2014.03.022

Keywords: 缓释非蛋白氮,泌乳性能,血液生化指标,奶山羊

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Abstract:

本试验旨在探讨饲粮中添加不同水平的一种新型缓释非蛋白氮(srNPN)对奶山羊泌乳性能及血液生化指标的影响。选择2~3胎平均体重约为60kg的健康西农萨能奶山羊泌乳羊48只,随机分为4组,每组12只。各组饲粮srNPN添加水平分别为0(对照组)、0.25%、0.50%、0.75%。预试期1周,正试期16周。结果表明:1)饲粮中添加不同水平的srNPN对奶山羊日均采食量无显著影响(P>0.05)。2)饲粮中添加srNPN可显著提高奶山羊日均产奶量(P<0.05),且0.50%组日均产奶量显著高于其他各组(P<0.05)。3)与对照组相比,srNPN显著提高了乳中乳脂含量(P<0.05),但试验组间无显著差异(P>0.05);各组乳中乳蛋白、乳糖及乳非脂固形物含量差异不显著(P>0.05)。4)饲粮中添加srNPN可显著降低血液尿素氮含量(P<0.05),其中0.50%组羊血液尿素氮含量最低;各组奶山羊血液甘油三酯、总胆固醇及总蛋白含量差异不显著(P>0.05)。由此得出,饲粮中添加srNPN能够提高奶山羊乳中乳脂含量,降低血液尿素氮含量,添加水平为0.50%时奶山羊日均产奶量最高。

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