低体细胞计数奶牛场在线电导率与每日产奶量之间的关系。

Relations between on-line electrical conductivity and daily milk production on a low somatic cell count farm.

作者信息

Nielen M, Schukken Y H, Van de Broek J, Brand A, Deluyker H A, Maatje K

机构信息

Department of Herd Health and Reproduction, Utrecht University, The Netherlands.

出版信息

J Dairy Sci. 1993 Sep;76(9):2589-96. doi: 10.3168/jds.S0022-0302(93)77593-1.

DOI:10.3168/jds.S0022-0302(93)77593-1

PMID:8227659

Abstract

To study the relation between on-line electrical conductivity and daily milk production, data of 1389 cow days were analyzed. After correction for cow effects and DIM, a rise of 1 mS of the mean electrical conductivity caused a decline of .88 kg/d in milk production. A rise of 1 ln(SCC) unit was associated with an additional decline of .54 kg/d in milk production. In cows without clinical mastitis during the test period, the losses associated with mean electrical conductivity and ln(SCC) were 1.06 and .45 kg/d of milk production, respectively. Electrical conductivity and SCC were associated with daily production loss; the effects were additive. Therefore, electrical conductivity and SCC can be utilized as indirect tests of subclinical mastitis.

摘要

为研究在线电导率与日产奶量之间的关系，对1389个奶牛日的数据进行了分析。在校正奶牛效应和泌乳天数后，平均电导率每升高1 mS，产奶量下降0.88 kg/d。ln(SCC)单位每升高1个单位，产奶量额外下降0.54 kg/d。在试验期内无临床乳腺炎的奶牛中，与平均电导率和ln(SCC)相关的产奶量损失分别为1.06和0.45 kg/d。电导率和体细胞计数与日产奶量损失相关；这些效应是累加的。因此，电导率和体细胞计数可作为亚临床乳腺炎的间接检测指标。