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测算立木材积,无论是在大面积的森林调查,还是在林业科研工作中,都是不可缺少的一项基础工作.我国目前的求积技术,大部分是采用一元材积表和二元材积表法,惟这两法在实际运用中,常感到不够使用;同时,它们虽能保证林分蓄积精度,但对单株立木材积的精度就不能得到保证.实验形数法,在应用中效果较好.韦斯托夫形数法和希费尔形数法,随着测树仪器的改进和公式的简化,也逐步在生产上实施.为了更好地比较、分析几种测算立木材积的方法,以便为精确地测算立木材积提供依据,近年来我们特作了些调查,收集了些资料,现将结果介绍如下:
Calculation of standing timber volume, both in a large area of forest surveys, or in forestry research work, are indispensable to a basic work.China’s current quadrature technology, most of the use of a single volume table and binary volume table method However, these two methods are often not enough to be used in practical application. At the same time, although they can ensure the accuracy of stand volume accumulation, the accuracy of stand volume per plant can not be guaranteed. .Westto’s algebraic method and Schiff’s algebraic method, along with the improvement of measuring instruments and the simplification of the formula, are also gradually implemented in production.In order to better compare and analyze several methods to calculate the stand volume, In order to provide the basis for accurate calculation of standing timber volume, we made some special investigations in recent years and collected some information. The results are as follows: