几种检测奶牛发情的辅助方法的准确性

W.J. Fulkerson , G.J. Sawyer , I. Crothers
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引用次数: 18

摘要

在120头大型商业奶牛群中,仅使用行为观察或结合使用激素处理的阉牛或尾漆来评估发情检测的准确性和效率。人工授精后的发情检出率分别为50%、88%和80%,两种方法受精率差异无统计学意义。白天连续观察12小时,3周内发情奶牛的发情率为83%。前乳黄体酮分析显示,除5头有阉牛和4头有尾漆的奶牛外,所有奶牛均有发情。除了2只动物在发情期怀孕外,其他所有动物都在发情期怀孕,这3种方法的准确性被认为是相同的。奶牛的发情活动在上午挤奶时高,然后再次上升,在下午早些时候达到高峰。在连续每日观察的12小时内,每头发情奶牛的平均坐骑数为14.6 +- 1.8。讨论了这些结果对奶牛群管理的启示。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The accuracy of several aids in detecting oestrus in dairy cattle

The accuracy and efficiency of oestrus detection using behavioural observations only, or in combination with hormone-treated steers or tail paint, was assessed on a large commercial dairy herd of 120 cows. The oestrus detection rate was 50, 88 and 80%, respectively, with no significant difference in conception rate between methods following artificial insemination. Continual observation for 12 h during the day detected 83% of oestrous cows over the 3-week period.

Progesterone analysis of fore-milk confirmed oestrus in all cows detected except for 5 cows detected with steers and 4 with tail paint. As all except 2 of these animals conceived at that oestrus, the accuracy of the 3 methods was considered to be the same.

Oestrous activity in cows was high at morning milking, then rose again to reach a peak in early afternoon. Mean number of mounts/oestrous cow, observed during the 12 h of continual daily observation, was 14.6 +- 1.8.

The implication of these results on dairy herd management are discussed.

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