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立地评价日显重要和迫切,并由定性描述转到定量分析评判;立地指数也由单树种转到多树种评价。于是,不同树种间的对等转换问题便亟需解决。我们认为,立地评价中不同树种间的对等转换,应该是生产力相等的转换,它以立地指数和立地类型的对等点的形式表示,即生产力相等的立地指数转换和立地类型对等点的转换。下面以开化为例,就杉木、马尾松的对等转换进行初步探讨。
Site evaluation is increasingly important and urgent, and transferred from qualitative description to quantitative analysis and evaluation; site index also changed from single species to multi-species evaluation. As a result, the problem of equivalence conversion between different species needs to be solved urgently. In our opinion, the reciprocal conversion among different tree species in site evaluation should be an equivalent conversion of productivity. It is expressed in terms of site index and site type equivalence, that is, the conversion of site index with equal productivity and that of site type Conversion. The following to Kaihua, for example, on the fir, masson pine conversion to conduct a preliminary discussion.