补充剂的时间取决于奶牛的摄入量和放牧行为
Citlali Anais Castro Jaime1, María Magdalena Crosby Galvan2, Juan Andrés Burgueño Ferreira3
1Universidad Autonoma Chapingo, Programa de Posgrado en Producción Animal, Texcoco, Mexico.
Tropical animal health and production
|March 4, 2025
概括
补充Holstein牛早上缩 (AM) 减少了春夏季草药摄入量. 这种养策略影响了放牧模式,奶牛喜欢在料营养密度最高时晚上放牧.
科学领域:
- 动物科学动物科学
- 乳制品营养 乳制品营养
- 牧场管理 牧场管理
背景情况:
- 缩补充剂是奶牛养殖中常见的做法,以满足营养需求.
- 缩养的时间可以影响奶牛的放牧行为和草药摄入量.
- 了解这些相互作用对于优化牧场利用和动物表现至关重要.
研究的目的:
- 为了评估早上 (AM) 与下午 (PM) 缩补充剂对新西兰霍尔斯坦牛草本摄入量和吞行为的影响.
- 为了比较AM,PM和AM-PM分离缩养策略对牧场奶牛的影响.
- 评估对缩剂补充时间反应的季节性变化.
主要方法:
- 在冬季和春夏期间,在混合牧场 (Medicago sativa L. 和 Dactylis glomerata L.) 上使用放牧乳牛进行了两项实验.
- 奶牛接受了5.0公斤的DM缩奶牛-1d-1在AM,PM或在AM和PM之间分割.
- 采用3x3拉丁方形设计,旋转放牧管理到8厘米的剩余草高度.
主要成果:
- 在冬季,缩剂补充时间没有显著影响草药摄入量.
- 在春夏期间,AM补充剂导致与其他治疗相比,草药摄入量减少了8%.
- 没有观察到补充时间对总放牧时间,反动物或其他食用活动有显著影响.
结论:
- 在春夏季早晨缩补充剂可以导致减少草药摄入量和改变放牧模式,有利于晚上放牧.
- 这种时机可能会导致奶牛在牧场的营养价值最高时食用牧场.
- 优化缩养时间对于最大限度地提高牧场利用率和奶牛生产率至关重要,尤其是在料质量高的时期.
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