乳牛饮食中的缓释尿素和
Carina Caren Santos1, Bruna Cardoso Braga2, Severino Delmar Junqueira Villela1
1Department of Animal Science, Federal University of Jequitinhonha and Mucuri Valleys, Diamantina, MG, 39100-000, Brazil.
Tropical animal health and production
|June 9, 2025
概括
放缓释放尿素 (SRU) 的较高水平增加了牧场摄入量,减少了奶牛的缩剂使用. прополис提取物没有影响牛奶产量或成分,表明SRU.
科学领域:
- 动物科学动物科学
- 类动物营养 类动物营养
- 乳牛管理 乳牛管理
背景情况:
- 非蛋白质源和离子体可以提高微生物的效率,从而改善干物摄入量,消化能力和牛奶产量.
- 缓释尿素 (SRU) 是一种非蛋白质源,可以优化功能.
- 提取物是一种天然化合物,在动物营养中具有潜在的益处.
研究的目的:
- 为了评估不同水平的缓释尿素 (SRU) 含有或不含提取物对杂交品种奶牛的表现的影响.
- 确定SRU的最佳含量率,以提高料效率和牛奶生产.
- 评估乳牛饮食中SRU和蜂提取物的协同作用或添加作用.
主要方法:
- 在84天的4x4拉丁方形设计实验中,使用了8只多双的Holstein x Gir杂交的奶牛.
- 牛的食补充了不同水平的SRU (150g或300g) 和提取物 (0g或20g).
- 关于干物质摄入量,饮食消化能力,牛奶产量和牛奶成分的数据是在每个21天子期的最后7天收集的.
主要成果:
- 加入 прополис提取物并没有显著影响干物质摄入量,饮食消化能力,牛奶产量或牛奶成分.
- 用300克SRU补充剂增加了牧场的干物质摄入量.
- 较高的SRU水平 (300g) 导致缩剂摄入量减少,但没有对牛奶产量或成分产生负面影响.
结论:
- 每天300克的缓释尿素可以提高牧场干物质的摄入量,并减少奶牛的缩剂需求.
- 在本研究中,提取物在与SRU一起使用时,似乎不会为牛奶生产或成分提供额外的益处.
- 通过SRU优化非蛋白质的供应可以成为管理料摄入量和潜在降低乳制品养殖成本的策略.
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