乳液保护的胆改善了奶牛的新陈代谢和哺乳性能
Fábio Soares de Lima1, Manoel Francisco Sá Filho1, Leandro Ferreira Greco2
1Department of Population Health and Reproduction, University of California Davis, Davis, FL 95616, USA.
Animals : an open access journal from MDPI
|April 13, 2024
概括
保护胆补充剂改善了奶牛的哺乳和新陈代谢,增加了牛奶产量和成分. 当胆在分娩前后被养时,益处最大,减少了超血和肝脂症.
科学领域:
- 动物科学 动物科学
- 营养生物化学 营养生物化学
- 乳牛生理学 乳牛生理学
背景情况:
- 胆对于酸丁胆合成至关重要,这是脂蛋白的关键组成部分.
- 早期哺乳期的奶牛可能没有足够的酸丁胆合成.
- 保护胆 (RPC) 补充剂可以增强新陈代谢和牛奶产量.
研究的目的:
- 为了评估食反保护胆 (RPC) 对奶牛的哺乳性能的影响.
- 评估RPC对乳牛早期哺乳期代谢参数的影响.
- 为了研究RPC对肝脂代谢和超血症发病率的影响.
主要方法:
- 两项实验涉及无和有的荷尔斯坦牛,它们每天被12.9克RPC.
- RPC从分娩前至产后80天内进行 (Exp. 1) 或仅在妊娠晚期 (例如. 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2). 2).
- 测量包括干物质摄入量,牛奶产量和成分,血代谢物 (胆,NEFA,葡萄糖,BHB) 和肝组织分析 (糖原,三糖醇).
主要成果:
- 在实验1中,RPC补充剂倾向于增加干物质摄入量,并显著改善牛奶产量,牛奶脂肪和真正蛋白质产量.
- 随着RPC补充,血胆度增加,特别是在实验2中.
- RPC降低了肝脏的三糖醇含量,倾向于降低三糖醇与糖原的比率,并降低了多胞胎母牛中超血症的发生率.
结论:
- 养乳头保护的胆可以改善奶牛的哺乳性能和代谢状态.
- 当RPC补充产前和产后时,观察到对乳生产和新陈代谢的最佳益处.
- 补充RPC可减轻肝脂质症,降低血过高的风险,特别是在多头母牛中.
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