防护林科技
防護林科技
방호림과기
PROTECTION FOREST SCIENCE AND TECHNOLOGY
2012年
1期
48-49
,共2页
申世永%张彩霞%吕妮%艾宇
申世永%張綵霞%呂妮%艾宇
신세영%장채하%려니%애우
榆阳区%杨树%胸径%地径%树高%材积%相关性
榆暘區%楊樹%胸徑%地徑%樹高%材積%相關性
유양구%양수%흉경%지경%수고%재적%상관성
Yuyang district%poplar%DBH%ground diameter%tree height%volume%relativity
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。
通過對60株榆林市榆暘區內生長的閤作楊(Populus simonii×P.pyramidalis cv.‘Opera8177)’生長情況的調查,結果錶明:隨著樹木生長加粗,胸徑、地徑基本同步增粗,胸徑/地徑比值變化很小,數值是0.84倍左右,其範圍在0.82~0.86;樹高的生長量隨樹木的生長加粗呈現放緩的規律,隨著樹木生長加粗,樹高/地徑比值逐漸變小,地徑8 cm時,樹高/地徑比值是58.92倍,地徑48 cm時,樹高/地徑比值是33.38倍。
통과대60주유림시유양구내생장적합작양(Populus simonii×P.pyramidalis cv.‘Opera8177)’생장정황적조사,결과표명:수착수목생장가조,흉경、지경기본동보증조,흉경/지경비치변화흔소,수치시0.84배좌우,기범위재0.82~0.86;수고적생장량수수목적생장가조정현방완적규률,수착수목생장가조,수고/지경비치축점변소,지경8 cm시,수고/지경비치시58.92배,지경48 cm시,수고/지경비치시33.38배。
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.