用非蛋白质补充背景饮食对体内甲生产,营养物质消化能力和方向盘性能的影响
Juan de J Vargas1, Federico Tarnonsky1, Federico Podversich1
1North Florida Research and Education Center, University of Florida, Marianna, FL 32446, USA.
Journal of animal science
|February 24, 2024
概括
在背景饮食中补充非蛋白质 (NPN) 增加了体外挥发性脂肪酸和氨,但没有影响动物的表现. 新的NPN混合物显示了牛食的潜力.
科学领域:
- 动物科学动物科学
- 类动物营养 类动物营养
- 料添加剂 料添加剂
背景情况:
- 非蛋白质 (NPN) 来源用于补充反动物饮食中的蛋白质.
- 评估新的NPN混合物,如尿素-酸盐 (UB) 和尿素-酸盐-酸盐 (UBN),对于优化背景饮食至关重要.
研究的目的:
- 评估NPN补充剂 (尿素,UB,UBN) 对体外发酵参数的影响.
- 评估这些NPN来源对背景饮食中的牛肉牛的性能和营养消化能力的影响.
主要方法:
- 实验1:在体外化转液,使用对照,尿素,UB和UBN处理来测量VFA,NH3-N,IVOMD,气体和CH4的产生.
- 实验2:对72头牛进行56天的养试验,评估干物质摄入量,营养消化能力,平均每日增益和增益:料比率,用U,UB和UBN补充.
主要成果:
- 在体外:NPN增加了NH3-N和VFA,但没有改变IVOMD,总气体或CH4产量. 在NPN来源之间没有观察到任何差异.
- 在体内:NPN补充剂没有影响干物质或营养素摄入. UB和UBN的营养消化能力低于尿素,不包括粉.
- 转向性能 (DMI,ADG,G:F) 仍然不受不同NPN治疗的影响.
结论:
- 经过测试的NPN混合物可以纳入背景饮食,而不会对动物的表现产生不利影响.
- 建议进行进一步的研究,以充分了解牛对这些新NPN来源的反应.
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