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首页> 外文会议>EAAP International Symposium on Energy and Protein Metabolism >Plasma natural 5N abundance may predict both feed conversion efficiency and residual feed intake In beef cattle across different dietary conditions
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Plasma natural 5N abundance may predict both feed conversion efficiency and residual feed intake In beef cattle across different dietary conditions

机译：等离子体天然5N丰度可以预测不同饮食条件的牛肉牛的饲料转换效率和残留饲料摄入量

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摘要

Cheap and rapid methods to predict between-animal variability of feed efficiency (FE) are needed. We evaluated, by using a large dataset on beef cattle (n=355) fed contrasting diets (grass vs com based diets), the potential of plasma natural 15N abundance (815N) as a biomarker of between-animal variation hi FE, measured either as feed conversion efficiency (FCE) or residual feed intake (RFI). Data were analyzed by mixed models, with diet and 815N as a fixed effect and experimental farm, batch and penas random effects. A negative and significant correlation was found between FCE and 815N within each contemporary group, with a lower response (slope) however in grass vs corn diets (815N x diet interaction; iM).002). Likewise, we found a significant but positive relationship between 815N and RFI, but without the influence of diet or any tested random effect. Our results indicate that 815N is a promising biomarker of between-animal variation of feed efficiency (FCE and RFI) in growing beef cattle.
机译：需要预测饲料效率（FE）的动物变异性的廉价和快速方法。我们评估了牛肉牛（n = 355）上的大型数据集（n = 355），喂食对比饮食（基于草与COM的饮食），等离子体天然15n丰度（815n）作为动物变异HI FE之间的生物标志物，可以测量作为进料转换效率（FCE）或残留饲料进料（RFI）。通过混合模型分析数据，饮食和815N作为固定效果和实验农场，批量和清层随机效应。在每个当代组内的FCE和815n之间发现了负面和显着的相关性，响应较低（斜坡），然而在草上的玉米饮食（815n x饮食相互作用; IM）.002）。同样，我们发现了815N和RFI之间的显着但积极的关系，但没有饮食的影响或任何测试的随机效果。我们的结果表明，815N是在生长牛肉中的饲料效率（FCE和RFI）的动物变异的有前途的生物标志物。

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