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共轭亚油酸钙对奶牛产奶量和品质的影响

DOI: 10.3969/j.issn.1000-7091.2012.06.033, PP. 167-171

Keywords: 奶牛,共轭亚油酸,乳成分,脂肪酸

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Abstract:

为研究共轭亚油酸钙对奶牛乳脂肪的影响,选取16头泌乳中期的奶牛饲喂不同日粮,分为对照组(基础日粮)、共轭亚油酸钙低剂量组(基础日粮+50g/(头.d))、中剂量组(基础日粮+100g/(头.d))、高剂量组(基础日粮+200g/(头.d)),试验共进行14d,分析乳产量和乳成分。结果表明,日粮中添加共轭亚油酸钙对奶牛的乳产量、乳蛋白和乳糖没有影响,但极显著降低了乳脂肪含量(P<0.01)。检测脂肪酸组成发现奶牛的中、短链脂肪酸(C6、C10、C12、C16)含量显著降低(P<0.05),而长链脂肪酸(C18、C18:1)的含量显著增加(P<0.05);发现添加共轭亚油酸钙显著降低了各种脂肪酸的产量。研究结果显示,奶牛饲料中添加共轭亚油酸钙能够降低乳脂率,改变脂肪酸的组成。

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