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烟酸对未去势湘中公牛生长性能、肉品质和血清生化指标的影响

DOI: 10.3969/j.issn.1006-267x.2015.01.012

Keywords: 烟酸,湘中公牛,生长性能,肉质,血清生化指标

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Abstract:

本研究旨在研究烟酸对未去势湘中公牛生长性能、肉品质和血清生化指标的影响。选择1.5岁左右体重[(385.08±15.20)kg]匀称的未去势湘中黑公牛21头,随机分成3组,每组7头,各组分别在基础饲粮中添加0、800、1200mg/kg烟酸。预试期14d,正试期120d。结果表明:烟酸对公牛的平均日增重、日均采食量、饲料转化率、背膘厚、眼肌面积均没有显著影响(P>0.05)。烟酸对背最长肌的pH、肉色亮度和红度值、剪切力、滴水损失以及水分、粗脂肪和粗蛋白质含量均没有显著影响(P>0.05)。1200mg/kg烟酸显著降低血清总胆固醇和高密度脂蛋白胆固醇(HDL-C)含量(P<0.05),800mg/kg烟酸显著降低血清HDL-C含量(P<0.05),烟酸对低密度脂蛋白胆固醇含量没有显著影响(P>0.05)。1200mg/kg烟酸可以提高血清非酯化脂肪酸(P<0.05)和葡萄糖含量(P=0.06),降低血清尿素氮含量(P=0.07)。综上,本研究并没有观察到烟酸对未去势湘中公牛生长性能和肉品质等指标有影响,但对血脂指标有一定调节作用,推测可能是未去势公牛的雄性激素的作用覆盖了烟酸的作用。

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