目前,林分立木蓄积量的计算,绝大部分要靠“一元立木材积表”解决。但一元材积表属小范围使用的数表,而我省的一元立木材积表是在5个大区使用,每大区平均面积4600万亩,其中林业用地面积580万亩,范围相当大。每个大区内同胸径的树高差别较大,导致有些单位计算失真。因此,缩小编表范围,改进计算方法,分树高级编制材积表,已为必须。具体编制过程如下。 At present, most of the calculation of the volume of forest stand-alone wood depends on the solution of “one-yuan stand timber volume chart.” However, the one-yuan volumetric table is a small-scale number-table, while the one-dollar timber-plot in our province is used in five large areas, with an average area of ​​46,000,000 hectares per area, of which, the forestry land area is 5.8 million hectares and the scope is rather large. There is a large difference in tree height with DBH in each area, resulting in the distortion of some units. Therefore, it is imperative to narrow down the range of tables, improve calculation methods and sub-tree advanced compilation of volume tables. The specific preparation process is as follows.