增长率,无论是通过遗传学还是饮食,主要决定了关于 brojiler福利的结果
J A J van der Eijk1, J van Harn1, H Gunnink1
1Wageningen Livestock Research, Wageningen University and Research, P.O. Box 338, 6700 AH Wageningen, the Netherlands.
Animal : an international journal of animal bioscience
|February 14, 2025
概括
减少肉生长率可以改善所有品种的福利. 然而,在行为和 litter 质量方面观察到品种特定的反应,快速生长的 brojlers 显示了更多的好处. 增长率,而不仅仅是基因,主要影响肉的福利.
科学领域:
- 动物科学动物科学
- 禽畜科学 禽畜科学 禽畜科学
- 动物福利 动物福利
背景情况:
- 现代肉生产面临着越来越多的福利要求.
- 解开遗传学,饮食和住房对肉福利的影响是具有挑战性的.
- 品种 (遗传学) 与生长速度 (饮食) 对 brojler 福利的具体贡献仍然不清楚.
研究的目的:
- 调查肉品种和饮食均衡蛋白 (BP) 对福利指标的独立和互动影响.
- 确定受遗传学或饮食影响的生长速度对 brojler 福利的影响程度.
- 为了在不同的食蛋白质水平下比较快速,中等和缓慢生长的 brojler 品种.
主要方法:
- 一个3x3因数实验比较了三种肉品种 (Ross 308,Ranger Classic,Hubbard JA757) 与三种饮食血压水平 (80%,90%,100%).
- 福利通过行为观察,对行为测试的反应,步态得分,火发生率,子质量和目标体重的整体福利得分来评估.
- 该实验包括每次治疗的四个复制品,共计36支笔.
主要成果:
- 降低生长速度 (低血压饮食) 普遍改善了一些品种的火烧得分和子质量.
- 与中等和缓慢生长的品种相比,快速生长的肉对减少的生长率表现出更积极的行为和 litter 质量反应.
- 在具有可比增长率的品种之间观察到福利的最小差异,这表明增长率的首要作用.
结论:
- 减小生长率的饮食调整可以提高各种品种的肉福利,尽管存在特定品种的变化.
- 无论是基因决定的还是饮食诱导的生长速度,都是影响 brojler 福利结果的主要因素.
- 当增长率相似时,福利的品种差异被最小化,这强调了增长管理的重要性.
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