补充过氧化的饮食补充剂改善了成品牛肉牛的甲缓解潜力
E Roskam1, D A Kenny2, A K Kelly3
1Animal and Bioscience Research Department, Teagasc Grange, Co. Meath C15PW93, Ireland; School of Biological and Chemical Sciences and Ryan Institute, University of Galway, Co. Galway H91TK33, Ireland.
过氧化 (CaO2) 有效地降低了牛肉牛的甲 (CH4) 排放量高达32%. 这项研究证明了其作为抗甲原性料添加剂的潜力,即使在颗粒化时也可以用于更容易的农场应用.
科学领域:
- 动物科学动物科学
- 农业科学 农业科学
- 环境科学 环境科学
背景情况:
- 畜牧业的甲 (CH4) 排放是一个重大的环境问题.
- 过氧化 (CaO2) 已被证明是一个有前途的体外抗甲原剂,可将CH4减少50%以上.
研究的目的:
- 评估饮食过氧化 (CaO2) 补充剂在加工肉牛中的有效性.
- 评估不同CaO2含量水平和物理格式 (粗粮与颗粒) 对动物表现,气体排放,反发酵和消化能力的影响.
主要方法:
- 72只奶牛牛被分配到四个治疗组:对照组 (CON),低含量粗粮 (LO),高含量粗粮 (HI) 和高含量颗粒 (HP).
- 在77天的时间里,动物们吃了60:40的草:缩料饮食.
- 测量包括使用GreenFeed系统的干物质摄入量 (DMI),平均每日增益 (ADG),料效率和肠道排放量 (CH4,H2).
主要成果:
- 补充CaO2并没有影响最终体重,ADG或料效率.
- 与CON相比,HI组显示DMI降低 (P < 0.01),而HP没有显著改变DMI.
- 与CON (P < 0.0001) 相比,CaO2显著降低了每天的CH4排放量16-29% (LO,HI,HP) 和排放量32-36% (P < 0.0001).
- 挥发性脂肪酸的产量下降,同时增加了酸度 (P < 0.0001).
结论:
- 食过氧化 (CaO2),无论是粗的还是颗粒的形式,都能有效地减少16-32%的肉牛加工过程中的甲 (CH4) 和排放.
- 氧化可以承受颗粒加工过程,从而促进其在料配方中的实际应用.
- 这些发现支持CaO2作为一种可行的抗甲原性料添加剂,用于牛肉生产系统.
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