肠道甲排放的分类和在背景和完成阶段的成长牛的排名
Juan de J Vargas1, Diego Manriquez1, Maya Swenson1
1AgNext, Department of Animal Sciences, Colorado State University, Fort Collins, CO, USA.
Journal of animal science
|February 15, 2025
概括
在背景和完成阶段根据甲 (CH4) 排放量对肉牛进行分类,可以识别较低的排放者. 然而,牛在不同阶段之间重新排名,需要重新评估以准确地分类CH4和残留甲排放 (RME).
科学领域:
- 动物科学动物科学
- 环境科学 环境科学
- 农业科学 农业科学
背景情况:
- 肉牛的肠道甲 (CH4) 排放是一个重大的环境问题.
- 有限的数据存在于CH4和残留甲排放 (RME) 分类一致性在背景和完成阶段.
- 促进生长的植入物对CH4和RME分类的影响尚不清楚.
研究的目的:
- 确定CH4和RME分类如何影响肉牛中的气体流量.
- 评估植入式和非植入式牛是否在背景和完成阶段保持CH4和RME分类.
- 分析最初的CH4/RME分类与后续分类之间的关系.
主要方法:
- 46只安格斯牛的生长性能和气体流量 (CH4,CO2,O2) 被监测.
- 测量了甲产量,产量,强度和RME,并将牛分类为低,中或高排放者.
- 费舍尔的精确测试分析了背景和完成阶段之间的牛的重新排名.
主要成果:
- 被归类为低CH4或RME排放者的人始终在两个阶段都产生较少的CH4.
- 根据生长阶段和植入物使用情况,二氧化碳的产量有所不同.
- 低CH4排放器的氧气消耗在背景,但不是完成过程中较低.
- 35%到83%的牛在背景和完成阶段之间重新排名,基于CH4和RME分类.
结论:
- 根据CH4产量,产量,强度或RME对成长中的牛进行分类,可以识别具有固有较低CH4产量的动物.
- CH4和RME分类需要对每个阶段 (背景和完成) 进行重新评估,因为动物的排名发生了重大变化.
- 这些发现有助于制定有针对性的策略,以减轻肉牛生产系统中的肠道甲排放.
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