加热大豆对乳母母奶牛中乳母氨基酸生物可用性,性能和乳母发酵的影响
Emily A Petzel1, Subash Acharya1, Evan C Titgemeyer2
1Division of Animal Science, University of Missouri, Columbia, MO 65211, USA.
Journal of animal science
|March 23, 2024
概括
大豆加工方法没有影响奶牛的营养消化能力. 与未烤大豆相比,烤大豆增加了干物质摄入量和牛奶产量,这表明能源利用率有所改善.
科学领域:
- 动物科学动物科学
- 乳制品营养 乳制品营养
- 动物生理学 动物生理学
背景情况:
- 大豆是奶牛的宝贵蛋白质来源,但素抑制剂可以减少蛋白质的消化.
- 了解大豆加工对营养供应的影响对于优化奶牛饮食至关重要.
研究的目的:
- 评估大豆基素抑制剂和大豆加工 (未烤与烤) 对哺乳期母牛的营养消化能力,哺乳性能和血氨基酸生物可用性的影响.
- 在哺乳乳奶牛中,比较腹腔素输液与晶体氨基酸类似剂的疗效.
主要方法:
- 在一项涉及腹部注射乳酪蛋白或晶体氨基酸和含有未烤或烤大豆的饮食的研究中,使用了八只经过反管注射的哺乳期霍尔斯坦牛.
- 通过便和尿液输出测量来评估营养素的消失.
- 监测了哺乳表现,牛奶成分和血氨基酸度.
主要成果:
- 无论是豆加工还是腹腔灌注来源都没有影响营养素的整体消化能力.
- 与那些被豆养的奶牛相比,豆养的奶牛的干物摄入量和能量校正的牛奶产量增加.
- 体输注素或晶体氨基酸增加了血中必需氨基酸度,素显示出更强的反应.
结论:
- 基于大豆的素抑制剂似乎不会对哺乳乳奶牛的后体氨基酸生物可用性产生负面影响.
- 与未烤大豆相比,烤大豆可以提高哺乳效率,这可能是由于营养利用率的提高.
- 与晶体氨基酸相比,素为哺乳乳奶牛提供更有效的代谢蛋白质来源.
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