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前言目前我国各省(区)先后编制了几个树种的立地指数(地位级)表。将为各地鉴定林分立地质量,制订合理的森林经营措施起到应有的作用。在编制过程中,对于数学模型的选择虽都力求正确地反映树高的生长进程,但是在实践中由于采用一般线性方程(指线性化后的非线性方程)去模拟,没有收到良好的效果。编制中尽管选择了几个数学模型进行对比、分析,其结果仍不能令人满意。本文作为引玉之砖,试图通过本研究引起广大测树工作者在编制立地指数表及其它
Foreword At present, our country’s provinces (autonomous regions) have successively compiled the site index (status level) tables of several tree species. It will play a due role in appraising the quality of stand-alone forests and establishing proper forest management measures. In the process of compilation, although the selection of mathematical models tries hard to correctly reflect the growth process of tree height, in practice, the good results have not been obtained due to the general simulation of linear equations (non-linear equations after linearization) . Although the compilation of several mathematical models selected for comparison, analysis, the results are still unsatisfactory. This paper, as a jade brick, tried to cause the majority of tree-finding workers to compile site index tables and other