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在实验室体发酵中用微藻生物质部分替代大豆粉可能会减少体蛋白质降解
R R Lobo1, M U Siregar1, S S da Silva1
1Department of Animal Sciences, University of Florida, Gainesville, FL 32608.
Journal of dairy science
|November 9, 2023
概括
将大豆粉替换为藻类来源,如Chlorella pyrenoidosa改善了乳牛的反体发酵和利用. 基于藻类的饮食降低了蛋白质降解标志物,并提高了效率,特别是在Chlorella.
科学领域:
- 动物营养和新陈代谢
- 动物生理学 动物生理学
- 可持续的料 可持续的料
背景情况:
- 大豆粉 (SBM) 是反动物饮食中常见的蛋白质来源.
- 研究替代的,可持续的蛋白质来源对于畜牧业至关重要.
- 藻类生物质提供了作为牲畜蛋白质补充剂的潜力.
研究的目的:
- 评估用藻类来源 (Chlorella pyrenoidosa和Spirulina platensis) 部分取代SBM对体外食者发酵的影响.
- 在使用藻类生物质作为蛋白质替代品时,评估营养利用和代谢物生产的变化.
主要方法:
- 使用3x3复制的拉丁方形设计与6个体外发酵器.
- 治疗包括SBM的对照饮食和两种饮食,其中50%的SBM取代了Chlorella (CHL) 或Spirulina (SPI).
- 经过8个小时的分析,分析了鲁米纳发酵动力学,代谢物产量和营养物质可降解性.
主要成果:
- 与对照组相比,养藻类的饮食增加了 propionate 的度和比例.
- 基于藻类的饮食减少了分支链短链脂肪酸 (BSCFA) 和异酸 (IA),这是蛋白质降解的指标.
- 与螺旋藻 (SPI) 相比, (CHL) 饮食导致氨 (NH3-N) 含量降低,非氨 (NAN) 含量增加,利用率提高.
结论:
- 用藻类生物质,特别是Chlorella pyrenoidosa部分替代SBM,可以提高类发酵和利用效率.
- 菌蛋白似乎更耐食者降解,导致蛋白质分解产品减少.
- 建议进行进一步的体内研究,以验证这些有前途的乳牛体内发现.
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