来自荷尔斯泰因-弗里西亚乳牛的肠道和便排放,这些乳牛以草或玉米为基础的食
Sanne van Gastelen1, Hendrik Jan van Dooren1, André Bannink1
1Wageningen Livestock Research, Wageningen University & Research, 6700 AH, Wageningen, the Netherlands.
Journal of dairy science
|July 21, 2023
概括
在奶牛的饮食中用玉米料代替草料减少了肠道甲和气排放. 在肠道和便甲排放之间没有观察到任何权衡,这表明温室气体减少的协同效应.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 动物科学动物科学
背景情况:
- 乳牛养殖对温室气体排放作出了重大贡献,包括甲 (CH4),氨 (NH3) 和氧化 (N2O).
- 饮食策略对于减轻这些排放和提高牲畜中使用效率至关重要.
研究的目的:
- 为了研究肠道和便CH4排放之间的权衡.
- 在乳牛食中改变料类型时,量化对CH4和排放 (NH3和N2O) 的协同效应.
主要方法:
- 一个交叉设计研究,使用64头荷尔斯坦-弗里西亚牛,比较基于草 (GS) 和玉米 (CS) 的饮食.
- 排放量被测量在机械通风的谷仓单位,分离肠道和便的贡献.
- 在适应和测量期间,监测了通风速率和气体度 (CH4,CO2,NH3,N2O).
主要成果:
- 与草饮食相比,玉米料饮食导致肠道CH4 (-11%),NH3 (-40%) 和N2O (-45%) 排放量较低.
- 肥料CH4和N2O排放不受饮食的影响,而NH3排放则倾向于在CS下较低.
- 在肠道和便中的CH4排放之间没有发现任何权衡.
结论:
- 在奶牛的饮食中用玉米料代替草提供了一种协同方法,以减少甲和气排放.
- 饮食改变可以有效地减轻肠道排放,而不会对便排放产生负面影响.
- 这一战略为减少奶牛养殖对环境的影响提供了一个可行的选择.
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