【摘要】 杨树是朝阳地区的主要用材树种。为准确估测杨树林分的蓄积 ,需要编制二元立木材积表。通过外业标准地调查 ,取得 152 7株样木数据 ,用 12 2 7株建立了二元立木材积模型 ,并用 30 0株进行了适用性检验 ,结果表明 ,该材积模型适用于朝阳地区 ,且精度很高。据此编制了朝阳地区杨树二元立木材积表。更多还原

【Abstract】 Poplar is the main timber tree species in Chaoyang region.Bivariate stem volume tables need to be constructed in order to evaluate the volume of poplar stands accurately.Date of 1 527 sample trees are gotten by field study of sample plots,Bivariate stem volume model are constructed and tests of adaptability are made.The results show that this volume model is suitable to be used in Chaoyang region and its accuracy is very high.Accordingly,Bivariate stem volume tables are constructed.更多还原