光皮桦不同造林密度林分生长效应分析

摘要

对6年生光皮桦不同造林密度林分生长效应进行了分析，结果表明：光皮桦不同造林密度对林木胸径、冠幅及材积生长差异极显著，树高生长差异不显著。不同造林密度对林分生长的影响，6年生时光皮桦林分蓄积量与造林密度大小成正相关，密度越大，林木分化越早，影响了光皮桦后期的生长。因此，选择合理的造林密度对林分正常生长发育及综合利用是十分重要的。此试验对光皮桦4个不同造林密度处理，以1100株／hm2最好。%This paper analyses the growth effect of different Planting density of six--year Betula luminifera. The results show that： in different planting density of Betula luminifera, the crown diameter and volume growth differences are very significant, but the differences in height growth are not significant. The impact of different planting density on forest growth and six--year stand volume with the planting density are propor- tional to the size of Betula luminifera,the bigger the density is, the sooner the trees differentiation is,which affects the growth in the getula luminifera. Therefore,it is very important to choose reasonable planting density to promote the stand normal growth and development and comprehensive utilization. In the test of pro- cessing four different afforestation density of Betula luminifera, the results show that the best is 1100 ohm-2