长白落叶松人工林生长过程及其经济效益的研究

采用解析木分析方法研究长白落叶松人工林生长过程,结果表明:径级10~15 a生生长较快,20 a生以后趋向稳定;树高15 a生以前生长迅速,20 a生后稳定生长;材积生长从20 a开始到40 a逐年增长,是生长旺盛期,40 a生平均生长量分别较20 a、25 a、30 a生增长了73.5%、41.5%和19.8%。40 a生落叶松每公顷木材产量分别为20 a、25 a生时的220%和169%,产值分别为292%和182%,年产值分别为146%和114%。长白落叶松人工林的培育方向应确定以大径级材为主。

Study on growth process and economic benefit of Larix olgensis Henry man-made forest

Growth process of Larix olgensis Henry man-made forest was researched by using analytic trees analysis method , results indicated that the diameter class of 10 ～15 a grew quickly , and tended to stabilization from 20 a; The height growth before 15 a was more quickly , and tended to stabilization from 20 a.The volume of wood increased year by year from 20 a to 40 a, which was the vigorous growth period .The average increment of 40 a was 73.5%、41.5%and 19.8%more than 20 a、25 a、30 a, respectively.The timber yield per hectare of 40a was separately 220%and 169%of 20 a and 25 a, and production value was separately 292%and 182%by which annual value of production was 146%and 114%, respec-tively.Breeding direction of Larix olgensis man -made forest would be the large diameter class tree .