对于哺乳期奶牛的和需求的新系统
André Soares de Oliveira1, Suziane Rodrigues Soares1
1Dairy Cattle Research Laboratory, Universidade Federal de Mato Grosso, Sinop, Mato Grosso, Brazil.
PloS one
|August 29, 2024
概括
这项研究引入了一个新的系统来预测奶牛的 (P) 和 (Ca) 需求,旨在优化性能和减少对环境的影响. 新模式为奶牛养殖提供了潜在的较低的P要求和更好的经济和环境可持续性.
科学领域:
- 动物营养 动物营养
- 乳制品科学 乳制品科学
- 环境科学 环境科学
背景情况:
- 准确预测 (P) 和 (Ca) 需求对于乳牛健康和最大限度地减少环境污染至关重要.
- 现有的模型可能无法完全捕捉哺乳期奶牛的复杂矿物质需求.
- 优化矿物营养是可持续乳制品生产的关键.
研究的目的:
- 开发和验证一种新的因数体系,用于确定乳母奶牛的净和食P和Ca需求.
- 提高对维护和哺乳期矿物质需求预测的准确性.
- 为提高乳制品行业的经济效率和环境可持续性提供一个工具.
主要方法:
- 从57个经过同行评审的矿物平衡试验构建了一个全球数据库.
- 使用元回归来估计内源性矿物损失和净需求.
- 量化矿物代谢系数 (MC) 和使用交叉验证的验证模型.
- 评估了饮食变量对矿物质MC的影响.
主要成果:
- 开发了内源性便和尿液P和Ca分泌的准确模型 (r = 0.89为P,0.79为Ca).
- 对于P (0.69) 和Ca (0.65) 的确定的整体饮食MC,不受饮食成分的影响.
- 新系统估计净和食P需求低于NASEM-2021和NRC-2001,并且Ca需求略高于NASEM-2021.
结论:
- 拟议的因数体系提供了一种精确的方法来估计哺乳乳奶牛的P和Ca需求.
- 这种系统有潜力降低饮食中的P水平,从而带来经济效益和减少环境优化.
- 这些发现通过改善矿物营养管理来支持更可持续和更有效的奶牛养殖实践.
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