PERFORMANCE OF DAIRY COWS DURING DIFFERENT SEASONS WITH DAILY HERBAGE ALLOWANCE: A REVIEW

L. Purnamasari
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Abstract

Pasture-based feeds are favored nowadays due to their cost-effectiveness and effect on animal welfare. Daily herbage allowance (DHA) affects the performance of dairy cows across different seasons. The key determinant of the performance of livestock is the dry matter intake (DMI) of herbage in pasture-based systems. A decline in average summer rainfall may result in considerably higher concentrate supplementation requirements to compensate for the loss in pasture growth and availability during autumn. Supplementation during autumn and winter boost total DMI and sustain milk output under grazing restrictions. Generally, milk production increases at high DHA but has no significant influence on milk fat content. In Spring, greater milk production lessens cows’ maintenance energy needs, and lower pasture content is linked to lower methane generation in the rumen. Methane generation declines in summer with increased digestibility at high intake levels. It is recommended to conduct an experiment exhibiting all seasons to eliminate factors that may affect the results across various studies. This review will understand variation in daily herbage intake of cows at pasture that allows the management of total intake to optimize milk production and identification of cows that are more efficient at converting feed into milk.
不同季节日补草量对奶牛生产性能的影响
目前,牧草饲料因其成本效益和对动物福利的影响而受到青睐。日草料补给量(DHA)影响奶牛不同季节的生产性能。畜禽生产性能的关键决定因素是牧草干物质采食量(DMI)。夏季平均降雨量的减少可能导致精料补充需求大幅增加,以弥补秋季牧草生长和可利用性的损失。在秋季和冬季补充可提高总DMI,并在放牧限制下维持牛奶产量。一般来说,高DHA时产奶量增加,但对乳脂含量没有显著影响。在春季,产奶量的增加减少了奶牛的维持能量需求,而较低的牧草含量与瘤胃中较低的甲烷生成有关。夏季甲烷产量下降,高摄入量时消化率增加。建议进行一个展示所有季节的实验,以消除可能影响各种研究结果的因素。这篇综述将了解牧场奶牛每日牧草摄入量的变化,从而允许管理总摄入量以优化牛奶产量,并确定更有效地将饲料转化为牛奶的奶牛。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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