通过对样木的测定,运用幂函数、线性以及多元回归等模型进行拟合,研究了福建省建阳市天然更新的檫木〔Sassafras tsumu (Hemsl.) Hemsl.〕林根系部分生物量同地上部分各因子的相关性。结果表明:檫木林根系生物量与地上部分、全树、枝条及枝干等各部分的生物量呈显著的相关关系;除细根外,粗根、根蔸和全部根系的生物量与胸径、树高之间大都存在极显著的相关性。对于天然更新的檫木林而言,采用W=aDαHβ模型进行拟合,结果精度更高。

Correlation between biomass production of root system and every factor of above-ground parts in the natural regenerated Sassafras tsumu ( Hemsl. )Hemsl. forest was studied in Jianyang of Fujian Province by investigating sample trees and different regression models.The results show that the significant correlation exists between biomass in root system and above-ground part, tree, branch and track of S . tsumu forest. Biomass of coarse roots, stake and total root system has a significant relationship with the tree height and DBH except fine roots. To the natural regenerated S . tsumu forest, regression model W =aDαHβ has a higher accuracy than other models.