消除饮食中的二碳酸会增加反时间,但不会影响摄入量或奶量
Daniel Espinoza1,2, Eyal Frank3, Yuri Portnik1
1Department of Ruminant Research, Institute of Animal Research, Agricultural Research Organization - Volcani Institute, Rishon Lezion, Israel.
The Journal of dairy research
|May 18, 2025
概括
将二碳酸 (SB) 添加到乳牛的低料饮食中没有影响料摄入量或牛奶产量. 然而,较高的SB水平与哺乳期母牛的反时间缩短有关.
科学领域:
- 动物科学动物科学
- 类动物营养 类动物营养
- 乳牛管理 乳牛管理
背景情况:
- 乳牛的低料饮食可能会挑战乳头功能.
- 碳酸 (SB) 经常被用作乳制品配给中的缓冲剂.
- 在基于小麦的低粗TMR中SB的有效性需要进一步研究.
研究的目的:
- 评估不同二碳酸盐 (SB) 水平对哺乳乳奶牛的料摄入量,牛奶产量和消化参数的影响.
- 为了确定SB补充剂对乳头pH值和反时间的影响,在养低粗粮,基于小麦的全混合 (TMR) 的奶牛中.
主要方法:
- 42只中期哺乳期的奶牛在7周内被养了低料的TMR,含有三种SB水平 (0,0.74,1.47%的干物质) 七周.
- 监测了料摄入量,牛奶产量和成分,能量校正牛奶 (ECM),全路表面消化能力,小的pH值和反时间.
- 在特定的时间间隔测量液的pH值,并收集便样本进行消化性分析.
主要成果:
- 食SB补充剂没有显著影响料摄入量,ECM产量,明显消化能力或料效率.
- 增加的SB水平与每日反时间有负相关性.
- 在食前和之后测量的液pH值不受饮食中的SB度的影响.
结论:
- 从基于小麦的低料TMR中去除SB不会对哺乳母牛的料摄入量或牛奶产量产生负面影响.
- 哺乳母牛可能会增加反时间,以弥补当SB被移除时缺少缓冲能力的情况.
- 可能需要进一步的研究,以充分了解SB在特定饮食环境中的长期影响,SB对皮的健康和牛的行为.
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