在山羊中,网红色消化管通过率的个体间变异性
1Université Paris-Saclay, INRAE, AgroParisTech, UMR Modélisation Systémique Appliquée aux Ruminants, 91120 Palaiseau, France.
Animal : an international journal of animal bioscience
|July 12, 2023
概括
消化器通道速率 (kp) 的个体差异显著影响山羊的营养利用率. 虽然已知一些因素,但固有的特征也在营养消化和牲畜可持续性中发挥作用.
科学领域:
- 动物科学动物科学
- 营养物质的新陈代谢
- 畜牧业可持续性 畜牧业的可持续性
背景情况:
- 营养物质的利用是畜牧业可持续性的关键.
- 消化道的通道速度 (kp) 是营养利用的一个主要决定因素.
- 有限的知识存在于个体的Kp的变化.
研究的目的:
- 调查羊群中溶解物和颗粒的网红色素 (RR) kp的个体间变异性.
- 探索RR kp和NDF总消化率 (NDFd) 之间的关系.
主要方法:
- 利用了103只单独的Saanen山羊 (割的雄性,雌性,完整的雄性) 在各种体重的数据集.
- 使用Cr-EDTA测量溶液的RR kp和使用难以消化NDF (iNDF) 的颗粒.
- 采用混合效应模型来分析个人之间的差异,考虑性别,体重和研究.
主要成果:
- 对溶液和颗粒的RR kp观察到个人间显著的变化 (CV ≈27%).
- 干物摄入量和NDF摄入量解释了10%的溶液kP变异和51.8%的粒子kP变异.
- 粒子kp的个体间变化解释了NDFd变化的19.5%,但固有特征仅解释了NDFd变化的1.24%.
结论:
- 颗粒和溶液的光谱 (Kp) 呈现出显著的个体间差异,受固有的特征和营养/动物因素的影响.
- 虽然粒子kp与NDFd有关,但粒子kp的固有特征并不能显著预测NDFd.
- 了解kp的个体变化对于改善营养利用和牲畜可持续性至关重要.
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