乳牛的表现提供了零放牧的草或由相同的草制成的草
A Lavery1, A W Gordon2, A White2
1Agri-Food and Biosciences Institute, Sustainable Agri-Food Sciences Division, Large Park, Hillsborough, Northern Ireland, BT26 6DR, United Kingdom.
Animal : an international journal of animal bioscience
|November 4, 2024
概括
与草相比,零放牧新鲜草每天改善了奶牛的牛奶产量和能量校正的牛奶产量 (ECM). 乳牛的这种性能提升与零放牧的更高的料干物摄入量 (DMI) 有关.
科学领域:
- 动物科学动物科学
- 乳制品营养 乳制品营养
- 飼料管理管理 飼料管理
背景情况:
- 零放牧 (ZG) 涉及每天为牲畜采摘新鲜草,确保高营养价值,但需要大量劳动力.
- 草 (SIL) 通过保护料提供了一个替代方案,可能减少每日劳动和草原管理时间.
研究的目的:
- 为了比较零放牧新鲜草与草对奶牛表现的影响.
- 为了评估两种养策略之间的牛奶产量,牛奶成分和干物质摄入量的差异.
主要方法:
- 36只荷尔斯坦-弗里西亚奶牛被分为两组:一组每天接受零放牧的草,另一组接受草.
- 两个组都补充了缩剂. 这项研究持续了12周,料由ZG.使用的相同的制成.
主要成果:
- 与食无草草的奶牛相比,食无草草的奶牛的食干物摄入量 (DMI) 和总DMI显著增加.
- 牛奶产量,能量校正牛奶产量 (ECM) 和牛奶蛋白度在ZG组显著更高.
- 牛奶脂肪度没有受到影响,但脂肪酸概况有所不同,ZG牛奶的PUFAs和单不和脂肪酸较高,SFAs较低.
结论:
- 与草相比,零放牧新鲜草导致奶牛的牛奶产量和ECM产量优于草.
- 零放牧的提高性能可能归因于这种养方法观察到的更高的料摄入量.
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