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奶牛静脉血内毒素浓度及其与产奶量的相关性

DOI: 10.3969/j.issn.1006-267x.2012.05.005

Keywords: 奶牛,内毒素,产奶量,相关性

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Abstract:

为调查我国当前主流饲喂方式下奶牛静脉血内毒素浓度的范围及内毒素浓度与产奶量的相关性,本试验首先验证了应用鲎试剂法定量奶牛静脉血中内毒素浓度的可行性,在此基础上,分别检测了安徽牧场1(60头,饲粮精粗比45∶55)、江苏牧场(15头,按产奶量高低精粗比分别为20∶80、45∶55、50∶50)和安徽牧场2(14头,饲粮精粗比70∶30)共89头奶牛的尾静脉血中内毒素浓度,并进行了内毒素浓度与产奶量的相关性分析。结果表明:鲎试剂法可有效检测奶牛静脉血中内毒素浓度,3个牧场奶牛静脉血中内毒素浓度高低不等,在0~1.50EU/mL范围内。奶牛静脉血中内毒素浓度与产奶量之间的相关性皆不显著(P>0.05),但安徽牧场2的相关系数(0.1952)大于安徽牧场1(0.0205)和江苏牧场(0.0376)。结果提示,鲎试剂法可用于定量检测奶牛血中内毒素浓度,在我国当前的饲喂方式下,奶牛血液中普遍含有内毒素,静脉血内毒素浓度与产奶量无显著相关性。

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