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奶时间对乳母山羊的产量,成分和牛奶的抗菌成分的影响
Zi-Long Liang1, Takahiro Nii1, Naoki Suzuki1
1Graduate School of Integrated Sciences for Life, Hiroshima University, Higashi-Hiroshima, Japan.
Animal science journal = Nihon chikusan Gakkaiho
|June 19, 2024
概括
奶山在09:00小时显著增加了牛奶产量,与之前或之后的时间相比. 这种最佳的挤奶时间也与较低的关键牛奶成分和血益乳素水平相关.
科学领域:
- 动物科学动物科学
- 乳制品科学 乳制品科学
- 生殖生理学 生殖生理学
背景情况:
- 优化牛奶产量和成分对于奶牛生产率至关重要.
- 之前的研究还没有研究不同奶时间表对这些参数的影响.
研究的目的:
- 为了比较不同奶时间对哺乳山羊的牛奶产量,成分和抗菌因子的影响.
- 为了确定挤奶时间是否会影响关键的生理标志物和牛奶质量.
主要方法:
- 在连续三个星期的时间里,八只正在哺乳的山羊每天在6点,9点和12点被奶一次.
- 牛奶和血液样本在磨奶期间每天收集用于分析.
- 分析包括牛奶产量,成分 (脂肪,Na+) 和抗菌成分 (β-防御素,S100A7),以及血前素水平.
主要成果:
- 在09:00h奶时,与06:00h和12:00h相比,牛奶产量显著增加.
- 血前素水平在09:00小时的挤奶期间是最低的.
- 牛奶脂肪,Na+,β-防御素和S100A7水平也在09:00小时的挤奶时间最低.
结论:
- 奶时间显著影响山羊的牛奶产量,成分和抗菌性质.
- 观察到的效应可能与血中益生菌度的变化有关.
- 调整挤奶时间表提供了一种提高牛奶产量和动物免疫力的策略.
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