树干重量的换算指标——形重的研究

The Conversion Index about Trunk Weight: Shape weight

形重是反映不同形状树干的重量指标，同时又是树干重量的直接换算因子。研究结果表明：形重具有与树干形状指标——胸高形数相同的特性。

Shape weight is the weight index reflecting varied trunk shape and the direct conversion factor of trunk weight too. The results show that shape weight possesses the same characteristic for the trunk shape index (common form factor), that is to say shape-weight decreases with tree height and diameter increasing.