四川省马尾松林可燃物载量模型研究  

Study on Fuel Load Model of Pinus massoniana Forest in Sichuan Province

作　　者：王洪荣 封伟 马诚 王纪杰 WANG Hong-rong;FENG Wei;MA Cheng;WANG Ji-jie(Sichuan Forestry and Grassland Survey and Planning Institute,Chengdu 610081,Sichuan,P.R.China;College of Civil Engineering,Southwest Forestry University,Kunming 650224,Yunnan,P.R.China)

机构地区：[1]四川省林业和草原调查规划院,四川成都610081 [2]西南林业大学土木工程学院,云南昆明650224

出　　处：《森林防火》2025年第1期35-40,共6页JOURNAL OF WILDLAND FIRE SCIENCE

基　　金：四川省级财政林业草原改革发展资金防火课题研究采购项目(G202206012、G202206012-2)。

摘　　要：探讨四川省马尾松林可燃物载量影响因素及构建估测模型,为该区域森林可燃物估算与调控提供科学依据。基于451个马尾松林可燃物调查数据,进行相关性分析和重要性排序,确定了影响可燃物载量主要因子,并构建了组合方程模型、逐步回归模型和随机森林模型进行比较。结果表明:马尾松林样地总可燃物载量均值为53.703 t/hm^(2),地表可燃物载量平均值为14.577 t/hm^(2),主要影响因子包括平均树高、平均胸径、海拔和郁闭度。通过对比,组合方程模型R^(2)为0.706,拟合效果最好,预测精度高,因此被选为最佳预测模型。In order to explore the factors influencing the fuel load of Masson pine forest in Sichuan province and construct an estimation model,so as to provide a scientific basis for the estimation and control of forest fuel in this area.Based on 451 survey data of fuel in Pinus massoniana forest,correlation analysis and importance ranking were carried out to determine the main factors affecting fuel load,and the combined equation model,stepwise regression model and random forest model were constructed for comparison.The results showed that the average total fuel load and surface fuel load were 53.703 t/hm^(2)and 14.577 t/hm^(2)respectively.The main influencing factors included average tree height,average DBH,altitude and canopy density.By comparison,the R^(2) of the combined equation model is 0.706,which has the best fitting effect and high prediction accuracy,so it is selected as the best prediction model.

关 键 词：马尾松 可燃物载量 影响因子 相关性分析 随机森林模型 

分 类 号：S762[农业科学—森林保护学]