从覆盖作物和豆类草牧场的牛放牧系统中排放的肠道甲排放
José Ignacio Gere1,2, Silvina Beatriz Restovich3, Juan Mattera3
1Unidad de Investigación y Desarrollo de las Ingenierías, Facultad Regional Buenos Aires, Universidad Tecnológica Nacional, Ciudad Autónoma Buenos Aires C1179AAQ, Argentina.
Animals : an open access journal from MDPI
|December 17, 2024
概括
牛肉牛放牧覆盖作物 (CC) 每天排放的肠道甲 (CH4) 比草牧场 (AFP) 减少了29%. 这表明覆盖作物可以减少牛放牧系统中的甲排放.
科学领域:
- 农业科学 农业科学
- 动物科学动物科学
- 环境科学 环境科学
背景情况:
- 肉牛的肠道甲 (CH4) 排放有助于温室气体排放.
- 旋转放牧系统可以影响料质量和动物表现.
- 优化放牧策略对于减轻畜牧生产对环境的影响至关重要.
研究的目的:
- 量化和比较牛肉牛的肠道甲 (CH4) 排放和干物质摄入量 (DMI).
- 评估两个旋转放牧系统对CH4生产的影响.
- 评估覆盖作物的潜力,以减少来自牛的CH4排放.
主要方法:
- 18只赫雷福德牛被分配到两个组 (每组n=9).
- 放牧处理包括覆盖作物混合物 (CC) 和草草草地 (AFP).
- 使用硫六化物 (SF6) 痕迹技术量化了甲排放量.
主要成果:
- 与AFP相比,使用CC的方向盘排放的CH4 (g/d) 减少了29% (119.1对167.1g/d;p <0.05).
- 在CC的牛中,CH4的产量比AFP (6.7%) 低36% (占总能耗的4.3%).
- 在治疗之间没有观察到平均每日增益 (ADG),DMI或CH4强度 (gCH4/kgADG) 的显著差异.
结论:
- 将覆盖作物整合到牛放牧系统中可以显著减少肠道甲排放.
- 覆盖作物的料质量的提高可能是减轻CH4产量的关键因素.
- 覆盖作物提供了一个可行的策略,以提高牛肉生产的可持续性.
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