在体外评估缓释尿素化合物
S W Ma1, J A Arce-Cordero2, R R Lobo1
1Department of Animal Sciences, University of Florida, Gainesville, FL 32608.
Journal of dairy science
|May 10, 2025
概括
缓释尿素 (SRU) 化合物改变了反体发酵,但没有影响营养降解或利用. SRU1显示出改善发酵的潜力,而不同的SRU化合物表现出不同的释放率.
科学领域:
- 动物科学动物科学
- 类动物营养 类动物营养
- 农业化学 农业化学
背景情况:
- 非蛋白质的来源对于反动物的饮食至关重要.
- 缓释尿素 (SRU) 化合物具有控制释放的潜力.
- 了解SRU对反动物发酵和营养利用的影响对于优化动物营养至关重要.
研究的目的:
- 为了评估不同缓释尿素 (SRU) 化合物对反动物发酵,营养物质降解和利用的影响.
- 在批量培养系统中评估各种SRU化合物的氨-N释放率.
- 为了在连续培养系统中比较SRU化合物与常规尿素的作用.
主要方法:
- 实验1:双流连续培养系统,在4x4拉丁方形设计中进行4次处理 (控制尿素,3个SRU化合物).
- 实验2:批量培养系统以确定SRU化合物的氨-N释放率.
- 分析包括乳头pH值,挥发性脂肪酸 (VFA),氨-N动力学,营养物质可降解性和代谢.
主要成果:
- 与对照组相比,SRU化合物,特别是SRU1,影响了挥发性脂肪酸概况,SRU1的酸:酸盐比率较低,蛋白质降解较少.
- 没有观察到SRU治疗对牛体pH值,氨-N动力学,营养物质可降解性或整体流量的显著影响.
- 实验2揭示了SRU化合物中释放率的显著差异,SRU1的释放速度比SRU2和SRU3更快.
结论:
- 不同的SRU化合物表现出不同的释放模式,影响食者发酵.
- 虽然SRU1显示出有利发酵特性的潜力,但整体营养降解性和利用率并没有得到改善.
- 由于SRU化合物的释率各不相同,因此需要仔细考虑它们在不同反动物的食中是否适用.
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