通过促进增长的技术增强转向增长和效率.
Marissa K Eekhoff1, Dathan T Smerchek1, Jodi L McGill2
1Department of Animal Science, College of Agriculture and Life Sciences, Iowa State University, Ames, IA, 50011, United States.
Translational animal science
|February 2, 2026
概括
促进生长的技术显著提高了牛的生长,料效率和尸体价值. 这些进步还减少了排泄,这表明牛肉行业的环境足迹更小.
科学领域:
- 动物科学动物科学
- 农业科学 农业科学
- 环境科学 环境科学
背景情况:
- 促进增长的技术对于牛肉生产效率至关重要.
- 了解它们对牛代谢和环境因素的影响至关重要.
研究的目的:
- 评估植入物和β-上腺激素激应剂对牛生长,血清代谢物和分泌的影响.
- 评估这些技术的经济影响和环境足迹.
主要方法:
- 安格斯十字牛被分配到四个治疗组:对照组,植入物 (IMP),IMP + lubabegron (LUB) 和IMP + ractopamine (RAC).
- 测量了生长性能,血清代谢物 (尿素,葡萄糖,胰岛素,NEFA),胰岛素敏感性和分泌量.
- 使用混合模型分析了尸体数据和经济回报.
主要成果:
- 促进生长的技术增加了最终的体重,平均每日增长和料效率 (P < 0.01).
- 热尸体重量在LUB群中最高,而CON和IMP群中马尔布化最大 (P<0.01).
- 随着技术的使用 (P < 0.01),每单位尸体调整后的ADG排泄量下降,胰岛素敏感性得到改善.
结论:
- 促进生长的技术提高了牛的表现和尸体价值.
- 这些技术可以通过提高利用率和料效率来减少牛肉生产对环境的影响.
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