优化饮食中乳头可降解的粉与乳头可降解的蛋白质的比例,可以提高中期哺乳期荷尔斯坦奶牛的哺乳性能和利用效率
Panliang Chen1,2, Yan Li2,3, Meimei Wang1,2,4
1College of Animal Science and Technology, Hebei Agricultural University, Baoding, China.
Frontiers in veterinary science
|March 15, 2024
概括
在乳牛中,优化食中可降解粉 (RDS) 与可降解粉蛋白 (RDP) 的比率 (SPR) 提高了奶产和营养消化能力. 中等SPR (2.3) 提高了哺乳性能和利用效率.
科学领域:
- 动物科学 动物科学
- 类动物营养 类动物营养
- 乳牛生理学 乳牛生理学
背景情况:
- 饮食中粉可降解 (RDS) 与粉可降解蛋白 (RDP) 的比例 (SPR) 影响粉发酵 *in vitro*.
- 关于食SPR对哺乳乳乳母牛的影响,存在有限的*in vivo*数据.
研究的目的:
- 调查饮食SPR对哺乳表现,营养消化能力,乳头发酵,血液指标和中期哺乳期荷尔斯坦奶牛的分区的影响.
- 确定乳牛生产和利用的最佳饮食SPR.
主要方法:
- 七十二只荷尔斯坦牛在8周内被食低 (2.1),中等 (2.3) 或高 (2.5) SPR的饮食.
- 评估了哺乳期的表现,营养物质的消化能力,乳头参数,血液代谢物和分泌.
- 饮食的制定是以异能,异和异为基础的.
主要成果:
- 牛奶产量和料效率随着SPR增加了四分之一,在中等SPR (2.3) 达到顶峰.
- 更高的SPR提高了营养消化能力和利用效率,减少了的分泌.
- 中等SPR改善了牛奶体细胞计数和血液抗氧化能力.
结论:
- 优化饮食SPR可以提高中期哺乳期荷尔斯坦奶牛的哺乳性能和利用效率.
- 为了改善生产和管理,建议使用中等饮食SPR (2.3).
- 需要进一步研究反体的微生物机制.
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