增加非植入式和植入式终端的补充的影响
Elizabeth M Messersmith1, Stephanie L Hansen1
1Department of Animal Science, College of Agriculture and Life Sciences, Iowa State University, Ames, IA 50011, USA.
Journal of animal science
|December 14, 2024
概括
补充 (Zn) 当与类固醇植入物相结合时,可以改善养场牛的表现. 增加Zn补充剂增强了接收植入物的牛的生长,尸体特征和Zn状态.
科学领域:
- 动物科学动物科学
- 营养生物化学 营养生物化学
- 类动物营养 类动物营养
背景情况:
- 类固醇植入物广泛用于提高养场牛的生长性能.
- (Zn) 是一种重要的微量矿物质,对许多生理过程至关重要,包括生长和免疫功能.
- 类固醇植入物和微量矿物质补充剂之间的相互作用需要进一步调查,以优化牛的生产.
研究的目的:
- 为了研究补充 (Zn) 对接受类固醇植入物的场牛的性能,尸体特征,微量矿物质状态和肌肉基因表达的影响.
- 为了确定Zn补充剂的最佳水平与类固醇植入物策略一起.
主要方法:
- 一项为期59天的研究涉及128只安格斯杂交牛,它们的食补充了0,30,100或150毫克Zn/kg干物质,有或没有类固醇植入物 (组件TE-200).
- 评估了性能 (体重,平均每日增加),尸体特征 (热尸体体重,产量等级),血Zn度和肌肉基因表达.
- 数据使用2x4随机设计和特定对比陈述来分析数据,以评估对补充和植入效应的线性和二次反应.
主要成果:
- 在接受类固醇植入物 (TE200) 的公牛中,补充Zn线性增加了18日的体重和平均每日增益 (ADG).
- 血中Zn度随着Zn补充剂的线性增加,无论植入策略如何,但在第18天植入牛群中较低.
- 植入牛 (TE200) 的59日体重和热尸体体重 (HCW) 较大;在植入牛中,HCW往往会随着Zn补充而增加.
- 没有观察到Zn补充对非植入式牛的表现有显著影响,尽管产量等级和背部脂肪倾向于在Zn补充时四分之一降低.
结论:
- 增加补充Zn积极影响类固醇植入物诱导的生长和养场牛中的Zn状态.
- 补充Zn与类固醇植入物信号通路相互作用,影响肌肉基因表达和整体性能.
- 优化Zn补充水平与类固醇植入物一起,可以增强体特性,提高料场牛的生产效率.
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