Research on the Relationship Between Surface Fuel Load and Stand Factors of Pinus yunnanensis Forest Based on Path Analysis Method
[Objective]In order to study the influence of forest factors on the surface fuel load of Pinus yunnanensis forest,explore the mecha-nism and relationship of forest factors on the surface fuel load,and provide scientific basis for forest fire prevention and surface fuel load man-agement in the research area.[Method]Taking Hanyuan County of Ya'an City as the study area,the standard plots and quadrats were set up in the Pinus yunnanensis forest to investigate the surface fuel load,and analyze the relationship between stand factors and surface fuel load.[Result]The results showed that the fuel load of the tree layer was significantly correlated with canopy density,stand density,and herbaceous coverage;the fuel load of shrub layer is significantly correlated with shrub coverage;the herbaceous fuel load is significantly correlated with canopy density,stand density,and herbaceous coverage;the fuel load of litter is significantly correlated with canopy density,forest density,herbaceous coverage,and litter thickness;the fuel load of humus was significantly correlated with herb coverage and humus thickness. The di-rect impact of average diameter at breast height and average tree height on surface fuel load is significant,while the indirect impact of canopy density and stand density on surface fuel load is significant.[Conclusion]The factors of Pinus yunnanensis forest affected the surface fuel load through direct and indirect effects,and the factors that affect the fuel load at different levels are also different. When conducting fuel manage-ment,it is necessary to select fuel management methods and control measures according to local conditions.
万方数据
维普
