华北落叶松人工林生长的合理经营密度探讨  

Study on Reasonable Management Density of Larix principis-rupprechtii Artificial Forest

作　　者：王绪芳 井赵斌[2] 程积民[2] 余治家 夏固成 

机构地区：[1]宁夏固原市六盘山林业局,宁夏泾源756401 [2]西北农林科技大学,陕西杨凌712100

出　　处：《贵州农业科学》2013年第10期168-171,共4页Guizhou Agricultural Sciences

基　　金：中国科学院战略性先导科技专项"应对气候变化的碳收支认证及相关问题"(XDA05050202);林业公益性行业科研专项"西北地区森林水文生态效应研究"(200904056);2011年中央财政林业科技推广示范资金项目"宁夏六盘山华北落叶松人工林近自然化改造技术推广示范"[(2011)TK120]

摘　　要：为了对华北落叶松人工林的合理管理和经营提供科学依据,在宁夏六盘山华北落叶松人工林地对不同密度样地的19年生华北落叶松生长因子与林分密度关系进行了研究。结果表明:19年生华北落叶松株高、胸径、冠幅和单株材积均随密度的增加逐渐减小,但减小的幅度不同。根据林分胸径、树冠面积和立木密度的相关规律,建立平均胸径与最适林分密度的相互关系N=10 385×DBH-0.897 5,据此可计算确定林分最适的经营密度。In order to provide a scientific basis for reasonable management and operation,study on relationship of growth factors and stand density were conducted for L.principis-rupprechtii with 19years age of stand in Liupanshan in sampling plots with different density.The results showed that plant height,diameter at breast height(DBH),canopy,and volume of individual tree were gradually decreased along with the stand density increased,but with different decrease rate.According to the related rules of DBH,canopy area,and stand density,the equation between average DBH and the optimal stand density were build as N=10385×DBH-0.8975,this equation could be used to confirm the optimal management density.

关 键 词：华北落叶松 人工林 生长因子 密度 抚育间伐 

分 类 号：S718[农业科学—林学]