冠长率
冠长率冠长率是是指树冠的长度与树木总高度的百分比。
冠长率是衡量树冠大小的数量指标,同时又是影响树木生长的重要因素。研究结果表明,冠长率与树木直径、材积相关关系非常紧密,其相关指数均达 0 .9以上,并且冠长率对树木下部直径的影响要大于对上部直径的影响。英文：RatrofCrownLengthThe rate of crown length is a quantity index for weighing the size of a tree crown, meanwhile,it is a important factor to affct the the growth of a tree. The study result indicates that the rate of crown length has a very compact correlativity to the diameter and volume of a tree, the correlation indices all above 0.9; besides, the rate of crown length has bigger affect on lower diameter than upside diameter.