乳牛养殖场的生物气候和牛奶成分数据之间的关系:THI和多变量天气指数之间的比较
Rita Marras1, Alfredo Pauciullo2,3, Alberto Cesarani1,4
1Department of Agriculture, University of Sassari, 07100 Sassari, Italy.
Animals : an open access journal from MDPI
|February 26, 2025
概括
环境因素对羊奶质量有很大的影响. 热应激和群体管理实践,如群体大小,影响牛奶成分,影响脂肪,蛋白质和乳糖水平. 在较大的群体中进行现代管理,可以获得更好的牛奶质量.
科学领域:
- 动物科学动物科学
- 乳制品科学 乳制品科学
- 环境科学 环境科学
背景情况:
- 环境变量,特别是气象因素,影响牛奶产量和成分的个体变化.
- 以前的研究表明,气象变量对牛奶有负面影响,特别是在夏季.
研究的目的:
- 调查气象变量对撒丁岛绵羊生产中散装牛奶成分的影响.
- 为了评估气候暴露对牛奶特征在春晚和夏天在五年期间的影响.
主要方法:
- 利用来自4562个奶羊养殖场的218,170个牛奶记录的数据集,与来自60个站的气象数据合并.
- 采用线性混合模型来分析牛奶质量,包括固定效应 (年,群体大小,温度湿度指数 (THI)) 和随机群体效应.
- 使用因子分析开发了一个多变量气象指数 (MMI),将其与THI相关联.
主要成果:
- 群体的大小和管理解释了30%-64%的牛奶成分变化; 拥有先进实践的大群体显示出更高的牛奶质量.
- 温度湿度指数 (THI) 显著影响了牛奶成分 (p < 0.001),在哺乳期的几个月里产生不同的影响.
- 热应激对牛奶脂肪含量产生了负面影响,而总细菌数量在温暖时期达到峰值. MMI对牛奶特征表现出与THI类似的效果.
结论:
- 羊群大小和环境条件,包括热应激,都会对羊奶质量产生重大影响.
- 管理实践,将传统的小群与现代的大群区分开来,导致牛奶特征的可测量差异.
- 调查结果强调了考虑环境和管理因素对于优化羊奶生产和质量的重要性.
关键词:
气候变化 气候变化 气候变化奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊,奶牛羊.热应激是一种热应激.牛奶的成分 牛奶的成分多变量统计的多变量统计.更多相关视频
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