氨基酸利用在Nellore牛牧场的效率低质量的料补充不同来源的
Ana Veronica Lino Dias1,2, Juliana Duarte Messana2, Yury Tatiana Granja-Salcedo2,3
1Department of Agricultural, Livestock and Environmental Biotechnology, School of Agricultural and Veterinary Sciences, São Paulo State University (UNESP), Jaboticabal 14884-900, SP, Brazil.
Life (Basel, Switzerland)
|August 26, 2023
概括
在干旱季节,通过玉米质粉 (CGM) 补充牛不可降解蛋白 (RUP),改善了氨基酸 (AA) 的摄入和吸收. 这种营养策略提高了放牧低质量的料的牛的营养利用率.
科学领域:
- 动物营养 动物营养
- 动物生理学 动物生理学
- 飼料利用 飼料利用 飼料利用
背景情况:
- 在干旱季节放牧的内罗尔牛经常面临营养缺乏,特别是蛋白质和氨基酸.
- 补充策略对于优化肉牛营养使用效率至关重要.
研究的目的:
- 为了评估非蛋白质 (NPN) 与反动物不可降解蛋白 (RUP) 补充剂对内罗尔牛的影响.
- 评估在放牧低质量的料时对摄入量,消化能力和氨基酸利用的影响.
主要方法:
- 八只内罗尔牛被用于四次复制的2x2拉丁方形设计.
- 在Urochloa brizantha cv.放牧的动物. 并且接受了尿素 (NPN) 或玉米质粉60 (CGM,RUP) 补充剂.
- 测量了摄入量,消化能力,氨基酸流量和血液参数.
主要成果:
- 玉米质粉 (RUP) 补充剂增加了干物质,总氨基酸和必需氨基酸摄入量.
- 在总氨基酸消化能力或微生物AA流量方面没有观察到显著差异.
- 补充CGM增加了血中异黄素,囊和白的度,但没有提高使用效率.
结论:
- 通过玉米质食 (CGM) 补充牛不可降解蛋白 (RUP) 是一个有效的策略.
- 这增加了尼罗尔牛放牧的氨基酸摄入量和吸收,这些牛放牧的干旱季料质量不佳.
- 补充CGM可以改善营养状况,而不一定提高整体使用效率.
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