使用GreenFeed和呼吸室测量的二氧化碳,氧气和甲交换和热量生产的比较
Ali-Reza Bayat1, Päivi Mäntysaari1, Tomasz Stefański1
1Animal Nutrition, Production Systems, Natural Resources Institute Finland (Luke), 31600 Jokioinen, Finland.
Journal of dairy science
|September 5, 2025
概括
绿色料系统准确地测量了奶牛的O2,CO2,CH4交换和热量产生,为大规模的能量代谢和料效率研究提供了呼吸室的可行替代方案.
科学领域:
- 动物科学
- 营养生理学
- 环境监测
背景情况:
- 精确测量气体交换和热量产生对于了解奶牛的能量代谢和料效率至关重要.
- 呼吸室 (RC) 是黄金标准,但资源密集,限制大规模应用.
- 绿色料 (GF) 排放监测系统为连续的大规模测量提供了潜在的替代方案.
研究的目的:
- 评估GreenFeed (GF) 系统测量O2,CO2和CH4交换以及哺乳奶牛的热量产生的精度和准确性.
- 将GF测量与传统呼吸室 (RC) 进行比较.
主要方法:
- 用32只北欧红牛进行回转设计,将GF单位与4个RC单位在每块5周内进行比较.
- 收集和分析了来自GF和RC的数据,并确定和删除了异常值.
- 统计分析包括混合模型线性回归来评估关系,偏差和预测错误 (RMSPE,CCC).
主要成果:
- 对O2,CO2,CH4交换和HP的GF测量与RC测量相当.
- 在GF测量中观察到高重复率 (0. 82- 0. 88).
- 在所有参数中发现了GF和RC之间的强相关性 (R2 = 0.79- 0.89) 和一致性相关系数 (CCC = 0.87- 0.94),其中O2,CO2和HP的偏差最小.
结论:
- 绿色料系统的高精度和准确性证明了其作为测量乳牛气体交换和热量产生呼吸室的替代品的有效性.
- 这有助于对牛的能量代谢和料效率进行大规模评估.
- 在CH4测量中存在偏差的可能性需要进一步调查.
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