食营养密度与肉的基因型和性别的相互作用:对生长,尸体质量和营养利用的影响
Carria Xie1, Shemil Macelline1, Sonia Liu1
1School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Sydney, NSW 2006, Australia; Poultry Research Foundation, The University of Sydney, Camden, NSW 2570, Australia.
Poultry science
|December 4, 2025
概括
食营养密度和肉基因型显著影响肉的表现. 科布肉的生长速度更快,但料转换率更高,而节能饮食并没有影响性能.
科学领域:
- 动物科学动物科学
- 禽类的营养 养
- 肉生产 肉生产
背景情况:
- 优化 brojler 营养对于高效的肉类生产至关重要.
- 了解基因型x饮食相互作用是定制养策略的关键.
- 肉的表现受营养密度,基因型和性别的影响.
研究的目的:
- 评估饮食营养密度, brojler 基因型 (Ross 308 vs. Cobb 500) 和性别对 brojler 生长,肉类产量,质量和营养利用的互动影响.
- 评估AgriFutures (AGF) 营养特征对肉性能的影响,这些特征减少了代谢能量 (ME).
- 为了确定对食配方的基因型特异反应.
主要方法:
- 1080个罗斯308和1080个科布500小在四个生长阶段 (开始,种植者,完成者,退出) 接受了三种饮食治疗 (罗斯308,科布500或AGF规格).
- 营养物质的消化能力在第35天被评估,尸体产量和母乳肉质量在第42天被评估.
- 分析了数据,考虑了基因型,性别和饮食规格的主要影响和相互作用.
主要成果:
- 与罗斯肉相比,科布肉的体重 (BW) 和生长速度较高,但料转换率 (FCR) 和料摄入量 (FI) 较高.
- 在AGF规格中降低了ME并没有影响整体增长表现.
- 与雄性相比,雌性鸟类的BW较低,脂肪沉积较高,营养消化能力 (蛋白质,能量,脂肪) 降低.
结论:
- 饮食营养密度的修改,特别是减少ME,可以在没有对 brojler 生长产生负面影响的情况下实施.
- 科布肉受益于更高的食氨基酸密度,从而改善FCR.
- 性别显著影响肉的生长和营养利用,强调需要在营养中考虑性别特异性.
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