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.

• 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。