29年生杉木不同造林密度生长进程分析研究

本文通过对２９年生不同造林密度杉木林分的树干解析，全面分析胸径、树高、材积的生长过程，结果表明：在相同林龄下，树高、胸径和材积的生长指标均随密度增大而递减；胸径和树高的连年生长量与平均生长量相交年限有随密度增加而减少趋势，且密度大的林分速生期较密度小的林分有所缩短；平均单株材积生长进程随密度的增大而减慢。

Study on Growth Process of Different Forestation Densities of 29-year-old Chinese Fir Plantation

This paper researched into the growth process of DBH (diameter at breast height), height and volume by stem analysis on 29-year-old Chinesefir plantations with different densities, the results showed that the growth indexes of DBH, height and volume decrease whith density increasing, the intersection period of current annual increment and mean increment of DBH and height earierise with density increasing, the fastgrowth period of higher density stand is shorter than that of others, and the growth process of mean individual volume slow down with density increasing.