简短的沟通:量化早期哺乳期荷尔斯坦-弗里西亚牛的后粉发酵
S van Gastelen1, J Dijkstra2, W J J Gerrits2
1Wageningen Livestock Research, Wageningen University & Research, PO Box 338, 6700 AH Wageningen, the Netherlands.
Animal : an international journal of animal bioscience
|September 24, 2023
概括
乳牛小肠中的粉发酵非常重要,尤其是在食用碎玉米时. 这一过程产生的挥发性脂肪酸 (VFA),而不是葡萄糖,影响营养利用.
科学领域:
- 动物科学动物科学
- 营养生物化学 营养生物化学
- 动物生理学 动物生理学
背景情况:
- 发酵显著影响了小肠中的碳水化合物消失.
- 粉发酵的能量效率低于酶性消化,突出显示了它的营养重要性.
研究的目的:
- 在奶牛中量化后粉发酵.
- 研究腹腔粉输注对发酵和营养利用的影响.
主要方法:
- 使用了6x6拉丁方形设计,配有6只经皮的荷尔斯坦-弗里西亚奶牛.
- 使用化 (NH4Cl) 的腹部注射,包括和没有粉碎的玉米.
- 使用13C缩来区分酵素消化和粉发酵.
主要成果:
- 阿博马萨土玉米输液增加了DM和粉摄入量,便粉和粉消化能力.
- 每天1311克粉的发酵发生在后,占总摄入量的60.8%.
- 便挥发性脂肪酸 (VFA) 产量的增加表明粉发酵的增强.
结论:
- 乳后粉发酵在早期哺乳期的奶牛中很大,它们被食了粉碎的玉米.
- 发酵产生大量的VFA,可能会改变葡萄糖生产途径.
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