An evaluation of parameters for the detection of subclinical rumen acidosis in dairy herds
An evaluation of parameters for the detection of subclinical rumen acidosis in dairy herds
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DOI：
10.1023/b:verc.0000045949.31499.20
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发表时间：
2004-11-01
影响因子：
2.2
通讯作者：
Kristensen, NB
中科院分区：
文献类型：
--
作者：
Enemark, JMD;Jorgensen, RJ;Kristensen, NB
在六个丹麦奶牛群中进行了一项观察性研究。一个专门设计的胃管相比，瘤胃穿刺技术的一部分，监测瘤胃pH值。在以前的研究中，使用胃管出现，以减少唾液污染。然而，与瘤胃穿刺技术的相关性较差（r=0.33; p=0.019），线性模型只能部分解释两种结果之间的差异。亚临床瘤胃酸中毒（SRA）的存在证明，在一个牛群中，通过瘤胃穿刺技术获得的结果判断。本研究揭示了在小型或中型牛群中，由于难以在相应的风险组中选择足够数量的奶牛，因此瘤胃穿刺术技术存在一些局限性。发现2头临床上明显正常的奶牛瘤胃pH值低于5.0，因此认为这种波动可能是暂时的，至少不会引起临床症状。然而，这种波动的长期影响尚不清楚。一般来说，经产奶牛似乎更倾向于低瘤胃pH值（
An observational study was conducted in six Danish dairy herds. A specially designed stomach tube was compared to the rumenocentesis technique as part of the monitoring of rumen pH. In contrast to a previous study, the use of the stomach tube appeared to reduce saliva contamination. However, correlation with the rumenocentesis technique was poor (r=0.33; p=0.019)and a linear model could only partly explain variations between either results. The presence of subclinical rumen acidosis (SRA) was evidenced in one herd only, as judged by results obtained by the rumenocentesis technique. The present study revealed some limitations of the rumenocentesis technique in small or medium-sized herds due to difficulties in selecting sufficient numbers of cows in the respective groups at risk. The finding of two apparently clinical normal cows with rumen pH values below 5.0 leads to the consideration that such fluctuations may be temporary and at least does not give rise to clinical symptoms. However, the long-term effect of such fluctuations is not known. In general, primiparous cows seemed more prone to low ruminal pH values (