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地位指数是以标准年龄时林分上层优势木的树高为指标来评定林地的生产力的.通常以标准年龄为基准(杉木20年),按林分优势本平均高度的变化幅度划分为若干个等级,并用各龄优势高的绝对值做为指数来评定林地质最.这样既直观又概括,一目了然.同时还可以有机的配合“数学模型”编制数量化立地质量评定表,对宜林荒山荒地的立地质量进行综合评价给造林提供科学的依据.
The status index is based on the standard height of the tree stand at the top of dominant forest as an indicator to assess the productivity of woodland.Generally based on the standard age (fir 20 years), according to the change of the average height of the forest superiority is divided into a number of Grade, and use the absolute value of the age advantage of high as the index to assess the most forest geology, so that both intuitive and summarized, at a glance.Also can also be organic with the “mathematical model” to prepare quantitative site quality assessment form, The site quality of a comprehensive assessment of afforestation to provide a scientific basis.