乳牛在不同的牧场分配频率和面积下放牧行为
L J Farrell1, C Glassey1, C Burke1
1DairyNZ Ltd., Private Bag 3221, Hamilton, New Zealand 3240.
JDS communications
|September 23, 2024
概括
与轮回放牧相比,连续放牧的奶牛吃饭的时间更长,躺着的时间更短. 在所有牧场分配频率上,牛奶产量保持一致.
科学领域:
- 动物科学动物科学
- 乳牛管理 乳牛管理
- 放牧生态 放牧生态
背景情况:
- 牧场分配频率会影响奶牛的放牧行为和生产力.
- 了解这些影响对于优化牧场管理和动物福利至关重要.
- 以前的研究还没有完全阐明与对比的牧场分配策略相关的行为权衡.
研究的目的:
- 为了比较三种不同的牧场分配频率下的奶牛的放牧行为和奶产.
- 为了研究牧场分配强度与关键动物行为 (如吃,躺和反) 之间的关系.
- 评估不同牧场管理策略对牧场积累的影响.
主要方法:
- 三组11头春季产牛奶牛在12周的时间内接受了高频轮放牧 (HFRG),7天轮放牧 (7RG) 或连续放牧 (CG).
- 使用加速度计和耳标传感器监测动物的行为.
- 记录了牛奶产量和成分,以及牧场覆盖面的估计.
主要成果:
- 连续放牧 (CG) 导致每日吃饭时间最高,但躺和反时间最低.
- 高频旋转放牧 (HFRG) 和7天旋转放牧 (7RG) 在躺或反时间没有显著差异.
- 治疗组之间没有观察到脂肪和蛋白质纠正的牛奶产量有显著差异,尽管牧场积累的变化,这是更高的频繁分配.
结论:
- 奶牛根据牧场的可用性来调整它们的放牧行为,增加吃饭时间以牺牲躺着时间为代价,因为牧场分配的频率较低.
- 虽然牧场分配频率没有影响牛奶产量,但更频繁的分配导致了更大的牧场积累.
- 在确定牧场分配频率时,管理策略应考虑行为权衡和对动物福利的潜在影响.
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