天然更新的檫木林根系生物量的研究

Study on root system biomass production of natural regenerated Sassafras tsumu trees

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〔Sassafrastsumu(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\%=a\%D\%\+\{α\}\%H\%\+\{β\} has a higher accuracy than other models.