养计划对 brojlers 料的代谢能量的影响:饥饿-养-饥饿与自由养相比
1State Key Laboratory of Animal Nutrition and Feeding, Institute of Animal Science, Chinese Academy of Agricultural Sciences, No. 2 Yuanmingyuan West Road, Haidian District, Beijing 100193, China.
Animal : an international journal of animal bioscience
|October 24, 2025
概括
饥饿-养-饥饿 (SFS) 养计划没有改变肉料中的代谢能量 (ME) 值. 然而,SFS提供了相对于增长的料摄入量和能量利用的更精确的测量,而不是随意养 (ALF) 计划.
科学领域:
- 动物营养 动物营养
- 禽畜科学 禽畜科学 禽畜科学
- 料评估 料评价
背景情况:
- 精确地确定可代谢能量 (ME) 对 brojler 食配方和生长管理至关重要.
- 养计划的选择可能会影响ME确定的精度.
- 现有的ME测定方法的精度可能有所限制,具体取决于养策略.
研究的目的:
- 测试饥饿-养-饥饿 (SFS) 养计划是否与持续自由养 (ALF) 相比产生不同的ME值.
- 评估养计划对肉生长表现和料摄入量的影响.
- 评估ME和代谢性CP (MCP) 测量与不同养计划下的肉生长相关的精度.
主要方法:
- 120只雄性Arbor Acres Plus肉 (21天大) 在2x3的因数设计中被分配给六次治疗.
- 治疗包括玉米-大豆基本饮食,小麦饮食或棉花饮食,结合SFS或ALF.
- SFS涉及17小时的禁食,55小时的食和17小时的禁食;ALF涉及连续72小时的食访问. 持续监测身体体重的情况.
主要成果:
- 养计划 (SFS与ALF) 没有显著影响任何饮食或成分的确定ME值.
- 在SFS计划下的肉显示出体重减轻,而ALF肉保持体重增加.
- 在SFS程序中,在线性回归中,平均每日增益 (ADG) 对平均每日料摄入量 (ADFI) 和ME/MCP摄入量的R平方值更高,表明更高的精度.
结论:
- 养计划不会改变 brojlers 料成分的可代谢能量的计算值.
- 与ALF相比,SFS养计划提供了与肉生长相关的料摄入量和能量利用的更精确评估.
- 建议在测量减小差异至关重要时使用SFS,而出于动物福利考虑,可以使用ALF.
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