和缓冲源对母乳养能力,反动物发酵,营养消化能力和奶牛代谢的影响
L F Martins1, K C Welter1, D E Wasson1
1Department of Animal Science, The Pennsylvania State University, University Park, PA 16802.
Journal of dairy science
|December 3, 2024
概括
乳液缓冲源,如二碳酸 (BICARB) 和阿拉戈尼特 (ARAG) 改善了奶牛中的牛奶脂肪. 与对照饮食相比,ARAG还增加了血液中的电离,而BICARB提高了料效率.
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:
- 优化奶牛的哺乳性能对于利能力至关重要.
- 排骨缓冲对于保持排骨健康和功能至关重要.
- 饮食中的和缓冲源可以影响营养利用和代谢状态.
研究的目的:
- 为了评估不同皮缓冲源 (石灰石,二碳酸,石) 对奶牛表现的影响.
- 评估对反动物发酵,营养物质消化能力和肠道气体排放的影响.
- 为了研究与酸平衡和新陈代谢相关的血液变量变化.
主要方法:
- 一个复制的3x3拉丁方形设计,有18头荷尔斯坦牛 (9头母和9多母).
- 在饮食中包括控制 (CON),二碳酸 (BICARB) 或阿拉贡石 (ARAG).
- 监测干物摄入量,牛奶产量和成分,料效率,反动物参数,营养消化能力,肠道气体排放量和血液变量.
主要成果:
- 与对照组相比,阿拉戈尼特减少了干物质的摄入量. 牛奶脂肪在BICARB和ARAG两种药物中都增加了. 用BICARB提高了料效率.
- 尽管ARAG增加了丁酸盐和造机NH3度,但造机发酵在很大程度上没有受到影响. 肠道气体排放和营养物质的消化能力没有改变.
- 与BICARB相比,ARAG增加了血液中的电离. 没有治疗对血液pH,Haptoglobin,BHB或尿素的影响.
结论:
- 碳酸和阿拉戈尼特都能提高哺乳期奶牛的乳脂产量.
- 阿拉戈尼特可能对血中的水平有好处,而碳酸可以提高料的效率.
- 进一步的研究可以探索这些缓冲源的最佳包含率和相互作用.
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