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在一个自动挤奶系统中,在荷尔斯坦牛的个别季度干燥后,挤奶动态
Clara Ibarguren1, Jason Lombard2, Juan Velez3
1Department of Animal Sciences, Colorado State University, Fort Collins, CO 80523.
JDS communications
|March 6, 2026
概括
个体四分之一干燥 (QDO) 会降低奶产,尤其是在哺乳期高峰后进行时. 剩余四分之一的补偿有所不同,与对照组相比,四分之三的奶牛的整体牛奶产量往往低于对照组.
科学领域:
- 兽医医学 兽医医学 兽医医学
- 乳制品科学 乳制品科学
- 动物养殖 动物养殖
背景情况:
- 个体四分之一干燥 (QDO) 是一种非抗菌策略,用于管理持续性乳内感染 (IMI) 和乳腺炎.
- 关于QDO对后续牛奶产量和剩余功能季度的表现的影响的研究有限.
- 了解QDO对牛奶产量的影响对于奶牛群管理和经济可持续性至关重要.
研究的目的:
- 调查临床乳腺炎后哺乳期QDO对剩余个体季度短期牛奶产量的影响.
- 根据哺乳期和季度位置,分析QDO后功能季度的牛奶生产补偿.
- 为了比较QDO治疗的奶牛的奶产与匹配的健康对照.
主要方法:
- 对114只多头母牛进行了回顾性观察性研究,其中四分之一因乳腺炎治疗不响应而干燥.
- 匹配的对照奶牛 (n=114) 根据牛奶中的天数 (DIM) 和平价选择.
- 每个季度的牛奶产量在QDO后的30天内每天使用自动挤奶系统记录;数据使用ANOVA进行反复测量分析.
主要成果:
- 只有在高峰前哺乳组 (≤68 DIM) 观察到四分之一牛奶产量的显著差异.
- 在高峰前组中,对照奶牛的总奶产量高于右后四分之一干掉的奶牛.
- 在高峰后的小组中,对照奶牛的奶产量比所有QDO治疗小组的奶牛产量最高.
结论:
- 在QDO后剩余季度的牛奶产量补偿是可变的,并且在哺乳期高峰后 (>68 DIM) 执行时效率较低.
- 与未受影响的对照相比,四分之三的奶牛的牛奶产量总体上仍然较低.
- QDO时间 (高峰前和高峰后) 显著影响牛奶生产结果.
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