在生长的 brojlers 中L-methionine 和DL-methionine 的相对生物可用性
Elham Izadi1, Mohammad Hossein Shahir2, Mohammad Amir Karimi Torshizi3
1Department of Animal Science, Faculty of Agriculture, University of Zanjan, P.O. Box: 45371-38791, Zanjan, Iran; Department of Poultry Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran.
Poultry science
|September 27, 2024
概括
与DL-methionine (DL-Met) 相比,L-methionine (L-Met) 补充剂在初始和种植阶段改善了 brojler 的生长和尸体产量. L-Met表现出更高的相对生物利用性,提高幼的料效率和母乳肉百分比.
科学领域:
- 动物营养和料科学 动物营养和料科学
- 禽畜科学 禽畜科学 禽畜科学
- 鸟类生理学 鸟类生理学
背景情况:
- 氨酸是一种必不可少的氨基酸,对肉的生长和发育至关重要.
- 了解不同氨酸来源 (L-氨酸与DL-氨酸) 的相对生物可用性对于优化家禽饮食至关重要.
- 以前的研究表明,在家禽中,L-氨酸和DL-氨酸的疗效可能存在差异.
研究的目的:
- 为了比较L-methionine (L-Met) 和DL-methionine (DL-Met) 的相对生物可用性 (RBA) 在生长中的肉中.
- 评估L-Met和DL-Met补充剂在初始和种植阶段对生长性能,尸体特征和抗氧化剂状况的影响.
- 确定最佳的氨酸来源,以提高年轻 brojlers 的料效率和肉产量.
主要方法:
- 使用雄性阿里亚肉进行了两项实验,分为初始阶段 (0-10天) 和生长阶段 (11-24天).
- 鸟类被食基本饮食没有氨酸或补充了DL-Met或L-Met的增量水平的饮食.
- 评估了生长表现 (ADG,ADFI,F:G),乳腺百分比和抗氧化剂状态. 通过非线性回归分析确定了相对生物利用性.
主要成果:
- 无论是L-Met还是DL-Met补充剂都改善了 brojlers 的生长性能,乳腺百分比和抗氧化剂状况.
- 与DL-Met相比,L-Met补充剂在启动阶段显著提高了平均每日增益 (ADG),平均每日料摄入量 (ADFI) 和料增益比率 (F:G).
- 在种植者阶段,L-Met改善了F:G,非线性回归显示L-Met的RBA显著更高,基于初始阶段的尸体百分比.
结论:
- 与DL-methionine相比,L-methionine在改善年轻肉的生长性能和料效率方面表现出更高的效率,特别是在启动阶段.
- L-Met的相对生物可用性高于DL-Met,特别是在年轻 brojlers的尸体百分比方面.
- 使用L-Met作为甲因来源可能会提高生长肉的料效率和尸体产量.
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