天目山区针阔混交林立地质量评价研究

Site Quality Evaluation of Coniferous and Broad-leaved Mixed Forest in Tianmu Mountain

在浙江省天目山区针阔混交林内设置固定标准样地,采用划分不同林分密度下不同径阶的优势树种(组)构建地位指数曲线簇,确立不同林分密度下标准样地各树种(组)的地位指数,并对标准样地各树种(组)的地位指数加权求和,计算出林分综合的地位指数。结果表明,相同林分密度的综合地位指数越大,说明林分的立地质量越好;不同林分密度的林分综合地位指数差异较大,说明林分密度对立地质量的影响较大,林分密度越大的林分,林分立地质量越好。

Sampling plots were set up within the theropencedrymion in Tianmu Mountain,Zhejiang Province.Status index curve clusters were established by partitioning dominant tree species with different diameter classes under different stand densities.The status indices of each tree species with different stand densities were calculated,which were then subject to weighted sum to obtain comprehensive site index.The result showed that the higher the comprehensive status index of the same stand density,the better the site quality of the stand.The comprehensive status indices of different stand densities were different,indicating that the stand density had a greater impact on the site quality,and the higher the stand density,the better quality of the forest.