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首页> 外文期刊>Tropical Animal Health and Production >Calf's sex, parity and the hour of harvest after calving affect colostrum quality of dairy cows grazing under high tropical conditions
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Calf's sex, parity and the hour of harvest after calving affect colostrum quality of dairy cows grazing under high tropical conditions

机译：小牛的性别，平价和产犊后的收获时间会影响热带条件下放牧的奶牛的初乳质量

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摘要

High-quality colostrum is an important factor influencing neonatal calf health, and quality assessment is essential to obtain good health results. This research evaluated the effects of the calf's sex, the parity of the cow and the hour of colostrum harvest after parity on the fat, nonfat solids, protein and Ig contents in Holstein colostrum for cows under high grazing conditions in the tropics. The effects of the calf's sex and parity on somatic cell count (SCC) at the first milking postpartum were determined. A comparison was made between a laboratory method and a farm method for the estimation of the fat and protein content of colostrum. Thirty-three cows were sampled in the study. The calf's sex was shown to have an effect on the amount of colostrum, on the concentration of fat, and on the amount of milk produced by lactating Holstein cows; all were higher in cows that gave birth to a female calf. Colostrum protein decreased after the first hour postpartum, and the Ig concentration had a tendency to decrease after 4 h. The cows that had parity 1-2 had lower Ig concentrations and total production of Igs, and higher SCC at the first milking postpartum. Ekomilk was a reliable method to measure the colostrum fat on the farm.
机译：高质量的初乳是影响新生儿小腿健康的重要因素，而质量评估对于获得良好的健康结果至关重要。这项研究评估了在热带地区高放牧条件下，犊牛的性别，母牛的胎龄和胎龄后的初乳小时数对奶牛荷斯坦初乳中脂肪，脱脂固体，蛋白质和Ig含量的影响。确定小牛性别和​​胎次对产后第一次挤奶时体细胞计数（SCC）的影响。在实验室方法和农场方法之间进行了比较，以估计初乳的脂肪和蛋白质含量。在研究中取样了33头母牛。小牛的性别对牛初乳的数量，脂肪的浓度以及泌乳荷斯坦奶牛的产奶量都有影响。出生于雌性小牛的奶牛中所有这些都更高。产后第一小时初乳蛋白质减少，而4小时后Ig浓度有降低的趋势。 1-2胎的母牛在产后第一次挤奶时的Ig浓度和Igs的总产量较低，SCC较高。 Ekomilk是测量农场初乳脂肪的可靠方法。

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