基于通径分析的云南松林地表可燃物载量与林分因子的关系研究  

Research on the Relationship Between Surface Fuel Load and Stand Factors of Pinus yunnanensis Forest Based on Path Analysis Method

作　　者：孙宇 车勇 敬辽 吴秉岭 SUN Yu;CHE Yong;JING Liao(Sichuan Provincial Institute of Forestry and Grassland Inventory and Planning,Chengdu,Sichuan 610081)

机构地区：[1]四川省林业和草原调查规划院,四川成都610081

出　　处：《安徽农业科学》2024年第14期95-99,155,共6页Journal of Anhui Agricultural Sciences

基　　金：四川省林业和草原调查规划院自立课题“干旱河谷区典型森林植被地表可燃物载量及影响因子研究”。

摘　　要：[目的]研究林分因子对云南松林地表可燃物载量的影响,探讨林分因子对地表可燃物载量的作用机理及其关系,为研究区森林防火和地表可燃物管理提供科学依据。[方法]以雅安市汉源县为研究区域,在云南松林中设置标准地、样方,调查地表可燃物载量,对林分因子和地表可燃物载量关系进行分析。[结果]乔木层可燃物载量与郁闭度、林分密度和草本盖度显著相关;灌木层可燃物载量与灌木盖度显著相关;草本可燃物载量与郁闭度、林分密度和草本盖度显著相关;枯落物可燃物载量与郁闭度、林分密度、草本盖度和枯落物厚度显著相关;腐殖质可燃物载量与草本盖度和腐殖质厚度显著相关。平均胸径和平均树高对地表可燃物载量的直接影响较大,郁闭度、林分密度对地表可燃物载量的间接影响较大。[结论]云南松林林分因子通过直接和间接效应共同影响地表可燃物载量,其影响机理各不相同,在进行可燃物管理时,要因地制宜地选择可燃物管理方法以及调控措施。[Objective]In order to study the influence of forest factors on the surface fuel load of Pinus yunnanensis forest,explore the mechanism and relationship of forest factors on the surface fuel load,and provide scientific basis for forest fire prevention and surface fuel load management 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 direct 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 management,it is necessary to select fuel management methods and control measures according to local conditions.

关 键 词：云南松林 林分因子 可燃物载量 相关分析 通径分析 

分 类 号：S762[农业科学—森林保护学]