乳母牛在产后30天内养的含酸盐添加剂的影响
Drew M Swartz1, Michael M Schutz1, Andre B D Pereira2
1Department of Animal Science, University of Minnesota, St. Paul, MN 55108.
Journal of dairy science
|December 8, 2024
概括
早期产后补充Rally (RAL),一种索尔比托料添加剂,提高了多卵母奶牛的牛奶产量. 这种料添加剂还减少了多头母牛对自动挤奶系统的非挤奶访问.
科学领域:
- 动物科学动物科学
- 乳制品营养 乳制品营养
- 动物生理学 动物生理学
背景情况:
- 产后早期是奶牛健康和生产力的关键时期.
- 含有比醇的料添加剂正在被探索,因为它们有可能提高哺乳性能.
- 自动挤奶系统 (AMS) 提供了有关个体奶牛表现和行为的宝贵数据.
研究的目的:
- 评估早期产后补充Rally (RAL) 的影响,这是一种基于sorbitol的料添加剂,对哺乳性能和AMS指标的影响.
- 为了确定RAL补充是否影响多雌性 (MT) 和初雌性 (PP) 荷尔斯坦牛的牛奶产量,能量校正牛奶产量 (ECM) 和牛的行为.
- 评估RAL在补充期 (1-30 DIM) 和补充后期 (31-90 DIM) 的影响.
主要方法:
- 一个随机对照试验是在一个商业乳制品农场进行的.
- 多偶数和初偶数的霍尔斯坦牛被分配到RAL补充剂 (570g/d) 或对照组.
- 通过AMS中的自动料分配器,RAL从1到30 DIM进行了管理,收集的数据高达90 DIM.
- 用重复测量的线性混合效应模型进行数据分析.
主要成果:
- 与对照群相比,在补充期间 (1-30 DIM) 补充RAL的多夫妇奶牛每天产生显著更多的ECM (3.52公斤).
- 在1-30 DIM期间,RAL补充剂减少了非奶牛访问AMS的0.66次/天,在多雌性母牛中.
- 这些对ECM产量的积极影响 (2.17公斤/天) 和AMS访问的减少 (0.59次/天) 在补充后的时期 (31-90 DIM) 持续存在于多母牛中.
- 在这两段时间内,原生母牛在RAL和对照组之间没有显示出乳量,ECM产量或AMS拒绝访问的显著差异.
结论:
- 早期产后补充Rally (RAL) 有效地增加了多母乳母牛的牛奶产量和改善了AMS行为.
- 在研究条件下,RAL并没有证明对原生母牛有显著的益处.
- 含有比醇的料添加剂,如RAL,在特定奶牛种群中提高哺乳性能,特别是在早期哺乳期的多母牛中.
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