榆林市榆阳区杨树地径、胸径、树高、材积相关性研究

摘要

通过对60株榆林市榆阳区内生长的合作杨（Populus simonii×P.pyramidalis cv.‘Opera8177）’生长情况的调查,结果表明：随着树木生长加粗,胸径、地径基本同步增粗,胸径/地径比值变化很小,数值是0.84倍左右,其范围在0.82～0.86;树高的生长量随树木的生长加粗呈现放缓的规律,随着树木生长加粗,树高/地径比值逐渐变小,地径8 cm时,树高/地径比值是58.92倍,地径48 cm时,树高/地径比值是33.38倍。%Growth of 60 trees of Populus simonii×P.pyramidalis cv.＇Opera8177＇ was investigated in Yuyang district of Yulin city.Result shows that DBH,ground diameter synchronous thicken with the growth of the trees;the ratio between DBH ground diameter changes very little;the value whose range is between 0.82-0.86 is 0.84 times.Growth of tree height appears slow law with the growth of trees;the ratio between tree height ground diameter gradually become smaller with the growth of the trees;the ratio between tree height ground diameter are 58.92 33.38 times while the ground diameter are 8 48 cm,respectively.