预测乳牛便和便中的正酸盐
Joyce L Marumo1, P Andrew LaPierre1, Andres F Ortega1
1Department of Animal Science, Cornell University, Ithaca, NY 14853.
JDS communications
|January 15, 2024
概括
新的方程式估计了乳牛中的正酸盐 (Ortho-P) 排泄,有助于环境管理. 这些工具有助于农民预测的影响,并减轻便造成的水污染.
科学领域:
- 环境科学 环境科学
- 动物科学动物科学
- 农业工程 农业工程
背景情况:
- 乳牛便含有正酸盐 (Ortho-P),是一种生物可用的 (P) 形式.
- 过度的Ortho-P排泄会给环境带来风险,包括水体的环氧化.
- 量化和管理Ortho-P排泄对于奶牛场的可持续性至关重要.
研究的目的:
- 开发用于乳牛便和便中Ortho-P排泄的经验预测方程.
- 利用文献数据建立总P (TP) 和Ortho-P内容之间的关系.
- 为环境管理目的提供估计Ortho-P排泄的工具.
主要方法:
- 汇编了关于乳牛便和便中的P形式的文献数据.
- 开发了线性混合模型,从TP (g/kg干物质) 来预测Ortho-P (g/kg干物质).
- 员工休假一次交叉验证以评估模型的预测准确性.
主要成果:
- 便方程式: 整形-Pf = -2.447 + 0.966 × TP (R2 = 0.79) 的值.
- 肥料方程:Ortho-Pm = -0.204 + 0.590 × TP (R2 = 0.77) 的意思.
- 这两种模型都显示出最小的偏差和可接受的预测性能.
结论:
- 开发出来的方程有效地估计了便和便中从总P中分泌的Ortho-P.
- 这些工具可以帮助营养学家和农民评估饮食对环境的影响.
- 方程可以集成到像CNCPS这样的模型中,以改进P管理和缓解策略.
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