CAJ | 학술논문

文章利用汪清林业局金钩岭林场落叶松人工林不同密度固定样地的长期观测数据，采用偏度、峰度、直径变动系数对林分直径结构动态变化规律进行了探讨，结果表明：①25a时偏度值随密度增加而增大，其后随着年龄增加，各样地的偏度值均逐渐减小，直径分布曲线右偏型逐渐减弱，期初密度大的样地偏度值变化明显；②随着年龄的增加，不同密度样地的峰度值逐渐减小，直径分布曲线逐渐变得平缓，期初密度大的样地尤其明显；③31a后，各样地直径变动系数稳定在0．36附近。
문장이용왕청임업국금구령림장락협송인공림불동밀도고정양지적장기관측수거，채용편도、봉도、직경변동계수대림분직경결구동태변화규률진행료탐토，결과표명：①25a시편도치수밀도증가이증대，기후수착년령증가，각양지적편도치균축점감소，직경분포곡선우편형축점감약，기초밀도대적양지편도치변화명현；②수착년령적증가，불동밀도양지적봉도치축점감소，직경분포곡선축점변득평완，기초밀도대적양지우기명현；③31a후，각양지직경변동계수은정재0．36부근。
Long - term observation data about larch which is from Jingouling wood farm, Wangqing for- estry bureaus was used in this paper. Skewness, kurtosis and coefficient of variation were adopted to analyzing the dynamics of the diameter structure of the forests with different density. The results indicated：（1）The skewness of the distribution curve of the diameters increased as the forests＂ density went up the they were at the age of 25a. And as the age increased, the skewness of the distribution curve of the diameters decreased, right - skewed degree of the distribution curve diminished gradually. The skewness of the sample plot with lager initial density changed apparently. （2）As the age grew, the kurtosis of the sample plots diminished gradually, and the distribution curves dropped off. The change was very apparent in the sample plots with bigger initial density. （3） The coefficient of variations of the sample plots stabilized near 0.36 when the age arrived 31 a.