牛奶脂肪酸概况与不同分娩后几天的生育能力之间的关系在第一或第二次哺乳期的奶牛中
Yuzu Chiba1, Takeshi Yamazaki1, Satoshi Nakagawa2
1Hokkaido Agricultural Research Center, NARO, Sapporo, Japan.
Animal science journal = Nihon chikusan Gakkaiho
|January 14, 2026
概括
牛奶脂肪酸概况,特别是新生脂肪酸 (DnF),与奶牛的受孕率有关. 早期哺乳期较低的DnF水平与第一和第二次哺乳期初次授精成功的降低相关.
科学领域:
- 动物科学动物科学
- 乳制品科学 乳制品科学
- 生殖生物学 生殖生物学
背景情况:
- 牛奶脂肪酸 (FA) 反映了奶牛的营养状况和生殖效率.
- 了解FA动态对于优化乳牛群管理和生育能力至关重要.
研究的目的:
- 检查牛奶脂肪酸成分在125天 (DIM) 和初次授精受孕率 (CR) 在200DIM.以下之间的关联.
- 为了确定与Holstein奶牛在第一和第二次哺乳期的生殖表现相关的特定FA概况.
主要方法:
- 使用了两个哺乳期的霍尔斯坦牛的月度测试日牛奶和受精记录.
- 分析了新的脂肪酸 (DnF:C4:0-14:0) 和预制脂肪酸 (C15:0和≥C17:0).
- 根据DIM间隔 (35,36-65,66-95,96-125) 和分组授精DIM,对FA水平进行分类 (低,中等,高).
主要成果:
- 在第一个哺乳期,较低的DnF水平在125 DIM以内与显著较低的CR相关,高达125 DIM.
- 在第二次哺乳期,低至中度的DnF水平在35 DIM以内,与高DnF水平相比,与显著较低的CR相关,高达95 DIM.
结论:
- 第一次哺乳期内125 DIM内的新生脂肪酸 (DnF) 与受孕率有关.
- 在第二次哺乳期35DIM以内的DnF水平与高达95DIM的受孕率有关.
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