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首页> 外文期刊>Vlaams Diergeneeskundig Tijdschrift >Is there an association between the shape of the initial phase of the lactation curve and the moment of first post partum estrus in high yielding dairy cows?Original Title Is er een verband tussen het verloop van de aanvangsfase van de lactatiecurve en het optreden van de eerste oestrus post partum bij hoogproductieve melkkoeien?
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Is there an association between the shape of the initial phase of the lactation curve and the moment of first post partum estrus in high yielding dairy cows?Original Title Is er een verband tussen het verloop van de aanvangsfase van de lactatiecurve en het optreden van de eerste oestrus post partum bij hoogproductieve melkkoeien?

机译：高产奶牛的泌乳曲线初始阶段的形状与产后第一发情的时刻之间是否有关联？原始标题泌乳曲线的初始阶段的过程与母乳之间是否存在关联高产奶牛发情产后？

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摘要

The present paper describes a study in which the association between the shape of the lactation curve based on daily milk yield recordings and the registration of the first post partum heat as detected by an automated heat detection system was examined. In total, 689 animals from 2 herds were included in the study. On both farms, the daily milk production was automatically registered by the management system. This data was used to determine in which week post partum the peak lactation occurred. Then the shape of the lactation curve between the first week and the peak week was calculated, which served as a good reflection of the rapidity with which the milk production starts up. Both herds were equipped with similar pedometers to detect cows in heat in a standardized and reasonably accurate way. The first heat was registered on average 52 days post partum. Factors significantly associated with the interval between parturition and first estrus were parity and maximum milk yield. Older cows and cows with a higher peak production were detected in heat significantly later. The rapidity with which the lactation starts up (expressed as the shape of the lactation curve) and the calving season were not significantly associated with the interval between parturition and first estrus.
机译：本文描述了一项研究，其中研究了基于每日牛奶产量记录的泌乳曲线的形状与由自动热量检测系统检测到的第一次产后热量的配准之间的关系。总共包括来自2个畜群的689只动物。在两个农场中，每日的牛奶产量均由管理系统自动注册。该数据用于确定产后高峰出现在产后的哪一周。然后计算出第一周和高峰周之间的泌乳曲线形状，可以很好地反映牛奶开始生产的速度。两种畜群都配备了类似的计步器，以标准化且合理准确的方式检测热中的母牛。产后平均产后平均记录初次热病。与分娩和第一次发情之间的时间间隔显着相关的因素是胎次和最大产奶量。显着晚些时候在热中检测到年龄较大的母牛和具有较高峰值产量的母牛。泌乳开始的速度（表示为泌乳曲线的形状）和产犊季节与分娩和初发之间的间隔没有显着相关。

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