浑河源头不同水源涵养林根系分布特征

【目的】揭示浑河源头不同水源涵养林根系分布特征。【方法】采用根钻法和WinRHIZO根系分析系统等研究手段,定量分析了不同林地根系参数(根质量密度、根长密度、根表面积密度、根体积密度)垂直分布特征以及不同径级根系分布特征。【结果】各个样地植物根系主要集中在0～20 cm土层,且随着土层深度的增加而减小,0～10 cm土层红松林地和采伐迹地显著大于混交林地和落叶松(p<0.05);各样地不同径级根质量密度分布存在差异,多为细根,根质量密度在0.47～9.73 g/cm~3之间,根长密度在0.88～5.90 cm/cm~3之间,根表面积在0.22～0.94 cm2/cm~3之间,根体积密度在0.003～0.022 cm~3/cm~3之间。【结论】不同水源涵养林植物根系主要集中在0～20 cm,红松和混交林地根系量最高。

Root Distribution Characteristics of Different Water Conservation Forests at the Source of Hunhe River

【Objective】To reveal the plant roots distribution characteristics at the source of Hunhe River.【Method】The vertical distribution characteristics of root parameters(root weight density, root length density, root surface area density, root volume density) and root distribution characteristics of different diameter classes were quantitatively analyzed by using root drilling method and Win RHIZO root analysis system.【Result】The roots of each plant were mainly concentrated in the 0～20 cm soil layer, and decreased with the increase of soil depth. The 0～10 cm soil layer was significantly greater than the mixed forest land and pinus koraiensis forest land(p<0.05).The density distribution of root weight in different sizes was different, most of which were fine roots; the root density was between 0.47～9.73 g/cm~3, the root length density was between 0.88～5.90 cm/cm~3, the root surface area density was between 0.22～0.94 cm2/cm~3, and the root volume density was between 0.003～0.022 cm~3/cm~3.【Conclusion】The roots of different water conservation forests were mainly concentrated at 0～20 cm, and the roots of Pinus koraiensis and mixed forest were the highest.