【摘要】 通过间伐改造在同一立地条件下建立杉木不同林分密度试验地,连续3年开展胸径、树高每木标尺调查,进行生长指标差异比较,并建立生长模拟曲线方程,得出以下结论:改造后初期不同林分密度对胸径影响最大,其次是树高,对材积的影响最小;林分密度保留170株/亩,大径级杉木单株数量多,生长趋势良好,可在本地区进行实施密度控制.更多还原

【Abstract】 By thinning experiment established different stand density of Chinese fir in the same conditions,for 3 consecutive years of DBH and height of each wooden staff survey,the growth index of differences,and establish the growth simulation curve,draw the following conclusions:after the initial transformation of different stand density maximum impact on DBH,tree height is second,influence for the minimum volume;The stand density was kept at 170 plants per mu,and the large diameter Cunninghamia lanceolata had a large number of individual plants and a good growth trend,and the density control could be carried out in this area.更多还原