一、前言随着商品经济的发展,人们越来越关切林术商品材积的大小,各林业生产管理部门对材种出材等级表、出材量表的要求也越来越迫切。特别是在编制森林经营方案、制定林业计划等工作中,林分蓄积量已经不能满足要求,而林分出材量乃至各材种出材量则是至关重要的数据。为了适应林业生产对于评估森林数量与质量的这些要求,促进材种出材等级表、出材 I. INTRODUCTION With the development of commodity economy, people are more and more concerned about the size of forest products, and the requirements of various forestry production management departments on the grades of timber products and their output scales are also becoming more and more urgent. Especially in the preparation of forest management programs, the development of forestry programs and other work, the amount of stand volume has been unable to meet the requirements, and stand out of wood and even the kinds of wood output is crucial data. In order to adapt to these requirements of forestry production for assessing forest quantity and quality,