其中，C为地位指数级距，ΔH为基准年龄时树高绝对变动幅度， k为指数级

Wherein, C is the exponential pitch position, tree height [Delta] H is the absolute age of the reference fluctuation range, k is the number of exponential, generally exponentially position distance is 1-4 m, the number of exponentially to about 10,

Among them, C is the status index distance, H is the base age when the tree height absolute change range, k is the index level number, in general, the status index level distance is 1-4 m, the index level number in about 10,

Among them, C is the rank interval of the site index, Δ h is the absolute change range of the tree height when the reference age is, K is the number of the index rank, in general, the rank interval of the site index is 1-4m, and the number of the index rank is about 10,<br>