天目山区针阔混交林树种测树因子特征研究

为揭示天目山区针阔混交林树种测树因子的基本特征,调查了15个30m×30m针阔混交林样地,进行了林分树种测树因子的统计和分析。结果表明:天目山区针阔混交林中乔木层共有49个树种,物种丰富度较高;针叶类树种株数比例占34.71%,阔叶类占65.29%;林木平均密度为1260株/hm2,树种间密度差异明显;林木胸径范围为5.0cm-74.0cm,树高范围为3.4m-18.8m,东西冠幅范围为0.6m-10.6m,南北冠幅范围为0.7m-10.7m,同一树种不同个体间及不同树种间在测树因子上有着明显的差异,表明针阔混交林能较好地利用生长空间,为营造针阔混交林和针叶林阔叶化改造提供了理论依据。

Survey of Species Measurement Factor in Tianmu Mountain on Coniferous-Broadleaved Mixed Forest

To reveal the basic characteristics of tree species factor in Tianmu Mountain onconiferous-broadleaved mixed forest, fifteen 30m × 30m coniferous -broadleaved mixed forest plotswere conducted, and tree factor were measured. The results showed that species were rich with 49species in total; the proportion of coniferous trees was 34.71%,65.29% was broadleaf; the averagedensity of stand was 1260 trees / hm2,and it was different significantly between different species; rangeof DBH was from 5.0cm to 74.0cm, range of height was from 3.4m to 18.8m, range of west crownfrom 0.6m to 10.6m, south crown was from 0.7m to10.7m. There was a big difference betweendifferent individuals of the same species and between different species on the same measurementfactors, it suggested that Coniferous-Broadleaved mixed forest can use the better space to grow, itprovided a theoretical basis to create a better Coniferous-Broadleaved mixed forest .