北京杨小青杨地位指数表的编制

The site index tables for Populus beijingensis and P. pseudo simonii

本文在大量标准地调查和树干解析的基础上编制了北京杨、小青杨地位指数表．采用导向曲线法进行地位指数表的编制，检验表明，该数表具较高精度，可用于现有森林的经营．还进行了立地类型地位指数表的编制，这种数表既可用于森林经营，又可用于造林工作中的适地适树规划，更能准确地反映各立地类型间树高生长过程的差异．

based on a lot of investigations into sample plots and stem analysis,Populus beijingensis and P.Pseudo simonii site index tables were established by adopting guide curve equation.The results showed that these tables could be used to guide the management Of real forest.Then,site type index tables were established too,code be used for both forest management and the Program of matching species with the site in silviculture.Also the tables showed accurately the differences of the beight of trees growth in different site conditions.