在试验室中使用来自N标记的豆的
S E Räisänen1, Þ H Sigurðardóttir1, A Halmemies-Beauchet-Filleau1
1Department of Agricultural Sciences, University of Helsinki, FI-00014 Helsinki, Finland.
JDS communications
|November 12, 2025
概括
这项研究评估了小牛的法巴豆蛋白利用率. 溶性蛋白N (SPN) 显示出最大的反体新陈代谢,而N洗剂不溶性N (NDIN) 的利用率最小,影响奶牛的蛋白质供应.
科学领域:
- 流体微生物学 流体微生物学
- 动物营养动物营养
- 植物蛋白的利用 植物蛋白的利用
背景情况:
- 法巴豆蛋白质分量在小体可降解性方面有所不同.
- 了解 (N) 的利用对于优化奶牛的饮食至关重要.
- N-标签允许精确跟踪N代谢.
研究的目的:
- 在体外鉴定和评估不同N分数的粉豆蛋白在牛体内的利用情况.
- 为了比较未分离的法巴豆种子的N代谢与其孤立的N分数.
- 评估法巴豆N部分对微生物蛋白质合成的潜在贡献.
主要方法:
- 富含N的法巴豆种子被分成不溶性N (INSN),NDIN和溶性蛋白N (SPN).
- 在体外批量培养中,使用体液模拟体条件10小时.
- 分析了池 (氨-N,细菌-N,料/原生动物-N) 的缩.
主要成果:
- 可溶性蛋白N (SPN) 呈现出最高的食新陈代谢,7%的N回收在氨-N和6%的细菌-N中.
- 清洗剂不溶性N (NDIN) 显示了最小的N利用率 (0.06%在氨N中,0.75%在细菌N中).
- 未分离的法巴豆 (FB) 在氨-N (12%) 和细菌-N (15%) 中获得了最大的N回收.
结论:
- 鲁米纳的新陈代谢在法巴豆N分数中显著不同.
- 可溶性蛋白N (SPN) 很容易在起草体中被利用,从而有助于微生物蛋白质.
- 需要进一步的研究来证实这些发现,并评估法巴豆在奶牛营养中的作用.
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