对比不同剩余二氧化碳配方作为选择高料效率奶牛的手段
A Chegini1, E Negussie1, A R Bayat1
1Natural Resources Institute Finland (Luke), Tietotie 4, 31600 Jokioinen, Finland.
Animal : an international journal of animal bioscience
|April 19, 2025
概括
剩余料摄入量 (RFI) 和剩余二氧化碳 (RCO2) 是动物效率的指标. 这项研究比较了奶牛的RCO2和RFI配方,发现RCO2FIN可用于改善能量转换和减少CO2排放.
科学领域:
- 动物科学动物科学
- 营养生理学 营养生理学
- 环境科学 环境科学
背景情况:
- 提高料利用效率和畜牧业的环境可持续性至关重要.
- 剩余料摄入量 (RFI) 是一种常见的料利用效率指标,定义为实际减去预期料摄入量.
- 剩余二氧化碳 (RCO2) 是温室气体排放的发展指标,类似于RFI.
研究的目的:
- 为了比较RCO2和RFI的不同配方.
- 评估RFI和RCO2计算中使用的回归系数的生物可信性.
- 评估RCO2/RFI配方与生产,效率和体重测量之间的相关性.
主要方法:
- 使用了83只北欧红牛的每日二氧化碳产量和干物质摄入量 (DMI) 数据.
- 计算了三种类型的RCO2和RFI配方:多重线性回归 (MLR),芬兰能源需求 (FIN) 和NRC 2021.
- 不同的RCO2和RFI配方相互关联,以及生产/效率特征.
主要成果:
- 不同的RCO2和RFI配方之间的相关性中等 (0.37-0.44),低于CO2产量和DMI相关性 (0.58).
- 与RFI相比,基于RCO2配方的选择提高了能量转换效率 (ECE) 和提高了CO2排放的减少.
- 在芬兰的奶牛中,RCO2FIN配方显示出与ECE和每单位能量校正牛奶排放的最有利的相关性.
结论:
- 不同的RFI配方可能导致选择不同的动物.
- 基于RCO2的选择对改善ECE和减少CO2排放是有效的.
- 由于其与关键效率和排放指标的良好相关性,RCO2FIN是芬兰奶牛首选的残留配方.
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