论牛的肉用、役用经济类型划分的意义和方法(BPI指数)

On Significance and Methods Differentiating Beef type from Draft type Cattle

关于以一个量值指标来划分现今典型的肉用型牛和役用型牛品种 ,还未见有报导。本文提出肉用指数 (Beef purpose index,简写为 BPI) ,即平均成年活重与体高的比值 ,作为划分肉用牛与役用牛 (品种 )的量值指标。经对国内外 74个肉牛和役牛品种 (类型 )资料计算 ,平均 BPI值 ,公牛 :4.56kg/cm,母牛 3.32 kg/cm。以此作为划分役牛、肉牛的基本界限 ,与传统抽象描述法划分结果吻合良好 ,符合比率由 92 .6% (国外肉用品种公牛平均值 )到 97.9% (国内黄牛品种母牛平均值 )。

It has not been reported on a quantity index for differentiating the present typical beef from draft cattle by now. Beef Purpose Index (BPI, ratio of adult body weight to body height) is put forward to be a quantity index for differentiating the present typical beef from draft cattle breeds. On the statistic data of 74 domestic and abroad cattle breeds, the average BPI is 4.56 kg/cm for bulls and 3.32 kg/cm for cows, respectively, As the basic limit, which is conformed to the results from traditional methods by 92.9%(abroad beef bulls)-97.9%(domestic yellow cattle cow)