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一、引言地位指数表是建立在林分平均年龄与林分优势木平均高之间相关关系基础上的。地位指数表的编制过程基本上采用了回归分析的方法,通过大量实际数据的回归分析,得到一些回归方程式,然后展开成表。因此,地位指数表若以数学模型表示,可以概括为林分平均年龄(A)与林分优势木平均高(H)的回归式和林分平均年龄与各年龄标准差原始值(S)的回归式。以福建省试点编制的杉水地位指数表为例,即可表示为:
I. INTRODUCTION The status index table is based on the correlation between the average age of the stands and the average height of the stands. The preparation of the status index table basically adopts the method of regression analysis. Through regression analysis of a large number of actual data, some regression equations are obtained and then expanded into tables. Therefore, if the index of status table is represented by mathematical model, it can be summarized as the regression equation and the average age of the stands and the original value of the standard deviation of each age (S) of the mean stand age (A) and the mean stand height (H) Regression Fujian Province pilot preparation of cedar water status index table, for example, can be expressed as: