用高蛋白饮食养的水培大麦补充剂改善了哺乳乳奶牛的生产性能
1Institute of Animal Science, State Key Laboratory of Animal Nutrition and Feeding, Chinese Academy of Agricultural Sciences, Beijing, 100193, P. R. China.
Journal of dairy science
|March 30, 2024
概括
用高蛋白饮食养水培大麦芽 (HB) 改善了奶牛的奶产和效率. 低蛋白饮食没有损害表现,但将HB纳入低蛋白饮食减少了料摄入量.
科学领域:
- 动物科学动物科学
- 乳制品营养 乳制品营养
- 动物的新陈代谢
背景情况:
- 优化奶牛的饮食对于牛奶生产和环境可持续性至关重要.
- 饮食中的蛋白质含量和替代料成分,如水培大麦芽 (HB),是研究的关键领域.
- 了解营养利用率和 (N) 使用效率对于高效的畜牧业至关重要.
研究的目的:
- 评估饮食原蛋白 (CP) 含量和水培大麦芽 (HB) 对哺乳表现的影响.
- 为了评估对血液生物化学和 (N) 的影响,在中期哺乳期的奶牛中使用效率.
- 调查CP度与乳牛饮食中的HB含量之间的潜在相互作用.
主要方法:
- 一个2x2的因数设计研究,涉及48只多夫妇的荷尔斯坦牛.
- 饮食中原蛋白 (CP) 含量各不相同 (16.8%与15.5%相比),并包括水培大麦芽 (HB) 或不包括.
- 测量包括干物质摄入量 (DMI),牛奶产量和成分,血液参数和营养消化能力.
主要成果:
- CP和HB之间的相互作用影响了DMI,牛奶和牛奶蛋白的产量;HB在CP高的饮食中提高了性能,而不是CP低的饮食.
- 水培大麦芽 (HB) 倾向于降低牛奶脂肪含量.
- 低蛋白 (LP) 或HB饮食的 (N) 使用效率更高,DM和CP的明显全通道消化能力在HP+HB饮食中得到改善.
结论:
- 低蛋白饮食可以在没有对奶牛表现产生不利影响的情况下养.
- 在与高CP饮食相结合时,水培大麦芽 (HB) 提高了牛奶和牛奶成分产量和N效率.
- 然而,在低CP饮食中养奶牛时,HB含量可能会损害奶牛的表现,这表明需要仔细制定饮食.
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