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CPM模型优化饲粮对16~24月龄后备荷斯坦母牛生长发育和血清生化指标的影响

DOI: 10.3969/j.issn.1006-267x.2015.09.009

Keywords: 16~24月龄后备母牛,CPM模型,生长发育,血清生化指标

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Abstract:

本文旨在研究应用CPM模型优化规模化奶牛场16~24月龄后备母牛饲粮对该阶段母牛生长发育及血清生化指标的影响。选择体重和体高相近的相同月龄(16月龄)荷斯坦后备母牛40头,将试验奶牛随机分为对照组和试验组,每组各20头,对照组后备母牛饲喂牛场当前饲粮,试验组后备母牛饲喂CPM模型优化后的饲粮,试验期从16月龄开始止于24月龄,共270d。结果表明:饲喂经CPM模型优化的饲粮显著提高了17月龄后备母牛的管围(P<0.05);试验组后备母牛的管围指数在17、18、20、21、23和24月龄时显著高于对照组(P<0.05),胸围指数在17和18月龄时显著高于对照组(P<0.05)。试验组后备母牛血清中钙的含量在17、23、24月龄时显著高于对照组(P<0.05),血清中磷的含量在16月龄时极显著地高于对照组(P<0.01)。经CPM模型优化后,16~22月龄和23~24月龄的饲粮成本分别降低了1.03、0.32元/d。饲喂CPM模型优化的饲粮在一定的范围内促进了后备母牛的生长发育,同时降低了饲养成本。因此,CPM模型可用于16~24月龄荷斯坦后备母牛饲粮配方的评价和优化。

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