不同缓释尿素对安格斯母牛的生产性能,乳液发酵和血液参数的影响
Caiyun Fan1, Hongguang Li1, Shuaihong Li1
1College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China.
Animals : an open access journal from MDPI
|August 29, 2024
概括
缓释尿素有效地取代了豆粉在安格斯公牛的饮食中,改善了生长和料效率. 这种饮食变化对发酵和血液标志物产生积极影响,没有任何不良影响.
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:
- 豆是牛的饮食中主要的蛋白质来源.
- 探索替代蛋白质来源对于可持续的畜牧生产至关重要.
- 缓释尿素提供了传统蛋白质成分的潜在替代品.
研究的目的:
- 评估聚合物涂层尿素 (PCU) 和凝化粉尿素 (GSU) 作为大豆粉替代品的有效性.
- 评估这些尿素形式对安格斯母牛的生产表现,血液概况和反发酵的影响.
- 确定牛食中缓释尿素的最佳替代水平.
主要方法:
- 210只安格斯公牛被分配到CON (没有尿素),PCU或GSU组.
- 尿素处理取代了部分大豆粉的异构代谢和异构.
- 分析了生产表现,血液指数和小体发酵参数.
主要成果:
- PCU组表现出更高的平均每日增益 (ADG) 和酸洗剂纤维 (ADF) 的明显消化能力,料增益比较低.
- 血清白蛋白 (ALB) 水平在PCU组显著升高.
- 分析显示,PCU组中乙酸和总挥发性脂肪酸增加,PCU和GSU组中黄油和酸增加.
结论:
- 缓释尿素 (PCU和GSU) 可以成功地替代Angus公牛的饮食大豆的一部分.
- 测试的替代水平并没有对母牛的整体表现产生负面影响.
- 饮食中的缓释尿素会影响反体发酵和细菌种群,这表明改善营养利用的潜力.
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