肠道甲产量和中性洗剂纤维可塑性:一个潜在的指标特征,用于料利用在乳制品育种
T A Skjerve1, K S Eikanger1, A Kidane1
1Department of Animal and Aquacultural Sciences, Faculty of Biosciences, Norwegian University of Life Sciences, Ås, Norway.
Journal of dairy science
|August 2, 2025
概括
这项研究确定了一头牛的身份.
科学领域:
- 动物科学动物科学
- 营养生理学 营养生理学
- 动物的新陈代谢
背景情况:
- 有效地利用植物纤维对于可持续的牛畜生产至关重要.
- 对食纤维 (中性清洁剂纤维 - NDF) 的反应的个体变化会影响甲排放.
- 识别有改善纤维利用的繁殖动物的特征是关键目标.
研究的目的:
- 评估一种反应规范模型,用于识别高效植物纤维利用的奶牛.
- 评估甲产生的可塑性,以应对饮食NDF作为潜在的指标特征.
- 探索甲生产可塑性和NDF可消化的关系.
主要方法:
- 使用了来自40头母牛的养试验数据集,这些母牛接受了不同料和缩物食.
- 分析了 ln-转化甲产量,使用反应规范模型,将 NDF 度作为环境梯度.
- 包括个人拦截和斜率的随机效应,并检查了与NDF可消化性相关的个人斜率.
主要成果:
- 在IN转化甲生产中的个体斜率 (可塑性) 与个体NDF可消化性有显著的积极关系.
- 反应规范模型确定了对NDF度的响应显著的个体变化.
- 基础数据的因素分析表明与料成分和摄入量/活性有关.
结论:
- 对食NDF度的甲生产反应的个体倾斜率可以作为改善粗利用率的繁殖母牛的指标特征.
- 这种可塑性特征显示了选择有效利用植物纤维的动物的潜力.
- 建议在适合遗传分析的更大数据集中进行进一步的验证.
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