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乳母羊的料效率和弹性之间的关系乳母羊遭受急性营养不良

E Barrio¹, G Hervás¹, M Gindri²

¹Instituto de Ganadería de Montaña (CSIC-University of León), Finca Marzanas s/n, 24346 Grulleros, León, Spain.

Journal of dairy science

|July 20, 2023

概括

与FE低的母羊相比,高料效率 (FE) 的奶羊对急性营养挑战表现出类似或更好的弹性. 这表明,提高羊的料效率可能不会损害它们从养不足中恢复的能力.

科学领域:

动物科学动物科学
营养生理学营养生理学
绵羊生产绵羊生产

背景情况:

为了高产量而养的奶羊降低了粗度,可能会影响对营养挑战的弹性.
提高料效率 (FE) 是一个育种目标,但其对弹性的影响尚不清楚.
产量高的母羊往往更有生产力,但可能有不同的弹性特征.

研究的目的:

为了研究料效率 (FE) 和乳羊对急性营养挑战的适应能力之间的关系.
探索高产阿萨夫母羊的反应和从营养不良中恢复的变化,具有不同的FE.
为了确定更高的料效率是否会损害乳母羊的弹性.

主要方法:

40只高产的阿萨夫绵羊在3周内随意食总混合粮食 (TMR),以计算料效率指数 (FEI).
雌羊被分为高FE (H-FE) 和低FE (L-FE) 组 (10只/组).
营养挑战涉及3天的TMR戒断和只有草的饮食,然后再食 TMR ad libitum;性能,头和血液参数被监测.

主要成果:

高FE羊在相似的料摄入水平下比L-FE羊更具生产力.
与L-FE羊相比,H-FE羊在营养挑战后表现出更快的反应和乳产的恢复.
总的来说,H-FE羊对急性营养不良的抵抗力相似或更好,驳斥了抵抗力较差的假设.

结论:

这项研究驳斥了这样一个假设:奶羊的更高的料效率会损害它们应对急性营养挑战的弹性.
高FE绵羊表现出可比或优异的营养不足恢复,这表明同时提高效率和弹性有潜力.
需要进一步的研究来评估限制料对H-FE母羊的生产状况的长期影响.

关键词:

营养营养营养营养业绩表现表现的表现表现是什么剩余料摄入量的剩余料摄入量羊群羊群羊群的羊群是什么意思

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