在受到营养挑战的母乳母羊中,料效率和弹性
E Barrio1, P Frutos1, N C Friggens2
1Instituto de Ganadería de Montaña (CSIC-University of León), Finca Marzanas s/n, 24346 Grulleros, León, Spain.
Journal of dairy science
|January 8, 2025
概括
选择羊的料效率并没有对在营养挑战期间的弹性产生负面影响. 高效率的羊表现出与低效率的羊相似的反应和恢复,挑战了关于权衡的假设.
科学领域:
- 动物科学动物科学
- 营养生理学 营养生理学
- 畜牧业 生产 畜牧业 生产
背景情况:
- 在气候变化和全球不稳定的情况下,提高动物的弹性对于可持续的畜牧业生产至关重要.
- 动物,特别是小反动物的料效率 (FE) 和性之间的关系仍然不确定.
- 了解高FE和弹性之间的潜在权衡对于育种计划至关重要.
研究的目的:
- 调查营养挑战对高和低料效率 (FE) 绵羊的弹性的影响.
- 为了确定选择更高FE是否会影响动物从料限制中恢复的能力.
- 为了比较高FE和低FE母羊对26天的不足养期的反应.
主要方法:
- 计算的剩余料摄入量 (RFI) 作为FE的代理在40名哺乳母羊中.
- 选择高FE (H-FE) 和低FE (L-FE) 的母羊 (每只n=8) 进行营养挑战.
- 在料限制期间和之后监测动物表现,反动物发酵和血液/牛奶代谢物.
主要成果:
- 与L-FE绵羊相比,高FE绵羊倾向于消耗较少的料以获得相应的牛奶产量.
- 无论是H-FE和L-FE组,对营养挑战的时间反应和恢复模式都是相似的.
- 在H-FE和L-FE组之间分析的参数中没有观察到显著差异,除了L-FE母羊血葡萄糖水平较高的趋势.
结论:
- 这项研究挑战了这样一个假设,即更高效的动物具有较低的弹性.
- 在这项研究中,在绵羊中选择料效率并没有影响对营养挑战的弹性.
- 需要进一步的研究,以充分阐明料效率和牲畜的弹性之间的复杂关系.
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