绵羊在不同生命阶段的甲排放量,它与使用便携式积累室的绵羊和成年绵羊有什么不同
Edel O' Connor1,2, Nóirín McHugh3, Eoin Dunne1
1Teagasc, Animal and Grassland Research and Innovation Centre, Athenry, H65 R718, Ireland.
Journal of animal science
|May 8, 2024
概括
这项研究量化了绵羊生命阶段的甲 (CH4) 排放量,发现哺乳期绵羊排放量最大. 了解这些CH4输出对于开发有效的温室气体减排策略在绵羊养殖中至关重要.
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:
- 从反动物的肠道发酵中产生的甲 (CH4) 是一个重要的温室气体.
- 准确的CH4输出测量在动物一生中对于了解排放模式至关重要.
- 绵羊养殖有助于农业温室气体排放,需要详细的数据来缓解.
研究的目的:
- 为了估计绵羊在不同生命阶段的CH4产量.
- 调查CH4输出和干物质摄入 (DMI) 之间的关系.
- 为国家温室气体库存和减排成本曲线提供数据.
主要方法:
- 使用便携式积累室的量化CH4和二氧化碳 (CO2) 输出.
- 估计的干物质摄入量 (DMI) 使用n-alkane技术和个人笔记.
- 利用线性混合模型分析生命阶段和影响因素之间的CH4和CO2输出差异.
主要成果:
- 甲,二氧化碳输出和DMI在不同绵羊生命阶段有显著的差异 (P <0.05).
- 哺乳母羊的CH4 (25.99g/d) 和CO2 (1711.6g/d) 产量最高,DMI (2.18kg DM/d) 也最高.
- 甲输出受活体体重 (P < 0.001) 的影响,与身体状况得分 (P < 0.05) 相反相关. DMI与CH4和CO2输出显示了中等的相关性.
结论:
- 本研究提供了基于牧场的系统中,在不同生命阶段为绵羊提供重要的CH4输出估计值.
- 结果为国家温室气体库存提供了有价值的数据,并确定了减缓战略的最佳时间.
- 了解生命阶段特定的排放对于在绵羊生产中有针对性的温室气体减排工作至关重要.
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