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不同林种之间面积合并的技术关键为功能换算系数的确定。由于森林是一种特殊的自然资源，它具多种用途，这使得一林种在满足人们主要经营目的同时，还能发挥其它功能。功能换算系数就是这种次要功能大小的度量。本文通过研究，初步定义“功能换算系数”为相同面积的一林种在功能上相当于另一林种的程度，可用０～１０来表示。在生产中提高功能换算系数可以实现用最少的土地资源发展林业，以满足人们对林业的总体和结构需求，并提高单位面积土地利用率和经济效益。
The technical key to the area consolidation between different forest types is the determination of the functional conversion factor. Since forests are a kind of special natural resource, it has many uses, which makes one kind of forest play some other functions while satisfying people’s main business purpose. Functional conversion factor is a measure of the size of this secondary function. In this paper, the initial definition of “functional conversion factor” for the same area of a forest is functionally equivalent to the extent of another forest, available 0 ~ 1 0 to represent. Increasing the functional conversion factor in production can allow forestry to be developed with minimal land resources to meet people’s overall and structural needs for forestry and to increase land use and economic efficiency per unit area.