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在C₃草草地增加牛群规模或密度会降低饮食质量

John Derek Scasta¹, Fernando Forster Furquim²

¹Department of Ecosystem Science, Laramie Research and Extension Center, University of Wyoming, Laramie, WY 82072, USA.

Animals : an open access journal from MDPI

|January 25, 2025

概括

牧场上的动物密度较高会降低牛的食质量,特别是粗蛋白和可消化的有机物质. 畜牧管理人员可以通过调整放牧时间和密度来减轻这种情况,以保持料质量.

科学领域:

牧场生态牧场生态
动物营养动物营养
牧场管理管理牧场管理

背景情况:

动物密度是一个关键的牧场管理决定.
高动物密度会对饮食质量产生负面影响.
了解这些影响对于可持续的畜牧生产至关重要.

研究的目的:

调查动物数量和密度对C3草草草地牛质量的影响.
量化动物密度和关键饮食成分 (如原蛋白和可消化的有机物质) 之间的关系.

主要方法:

实地研究进行了三年在威尔,WY,美国.
在不同的牧场大小和动物密度上收集群体级牛便样本.
使用近红外反射光谱学 (f.NIRS) 分析便样本,以估计原蛋白 (CP) 和可消化有机物 (DOM).
使用结构方程建模 (SEM) 的统计分析来评估动物密度对饮食质量指标的影响.

主要成果:

增加的动物数量和密度是减少CP和DOM的显著预测因素.
较高的密度导致CP下降1.2%,DOM下降2.0%,每单位增加密度.
随着动物密度的增加,DOM:CP比率增加,这表明营养平衡发生了变化.

结论:

在更高密度的动物群体中聚集动物,即使是在高质量的草中,也会降低摄入后的饮食质量.
畜牧管理人员可以通过战略性调整动物群的时间和密度来减轻负面影响.
这项研究为优化放牧管理策略以维持牲畜营养提供了宝贵的见解.

关键词:

这就是Bos Taurus.布罗莫斯内尔米斯 (bromus inermis) 是一个无力动物.这是一种Medicago sativa.护士们的护士们牧场管理牧场管理动物福利动物福利近红外反射率光谱学近红外反射率光谱

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