北京林业大学学报2024，Vol.46Issue(8)：132-138,7.DOI:10.12171/j.1000-1522.20230305
陇南市主要森林类型死可燃物特征及危险性评价
Characteristics and risk assessment of dead fuel in main forest types in Longnan City,Gansu Province of northwestern China
摘要
Abstract
[Objective]This paper explored the characteristics of dead fuel in main forest types in Longnan City,Gansu Province of northwestern China,and assessed the risk of forest fires,to provid theoretical support for regional forest fire prevention.[Method]Taking four main forest types in Longnan City as the research objects,the paper analyzed the difference of dead fuel load,dry to fresh ratio,equilibrium moisture content,ignition point and calorific value,and evaluated the fire risk of different forest types by membership function fuzzy evaluation method.[Result]The total dead fuel load of different forest types was Pinus tabuliformis>Larix gmelinii>Quercus>Pinus armandii. The total dead fuel load of Pinus tabuliformis (16.02 t/ha) was significantly higher than others (P<0.05),and the dead fuel load of humus layer and litter layer 1 was significantly higher than that of litter layer 2 and 3 (P<0.05). The dry to fresh ratio of dead fuel in Pinus tabuliformis litter layer 1 was significantly higher than that of Larix gmelinii (P<0.05). The dry to fresh ratio of dead fuel in litter layer 2 was the highest (58.21％-66.47％) and that in humus layer was the lowest (51.29％-55.56％). The equilibrium moisture content of dead fuel in oak was the largest,while that in larch was the smallest. The equilibrium moisture content of dead fuel in litter layer 3 was the highest (16.78％-20.38％),and that in humus layer was the lowest (12.22％-13.86％). The equilibrium moisture content of dead fuel was directly proportional to the diameter of fuel. The ignition point of humus layer was significantly higher than that of litter layer,while the calorific value was opposite (P<0.05). The fuzzy evaluation results of membership function showed that the fire risk of Pinus tabuliformis stands was the largest,followed by Quercus sp. and Larix gmelinii,and that of Pinus armandii stands was the lowest.[Conclusion]There are differences in dead fuel load,dry to fresh ratiod,equilibrium moisture content,ignition point and calorific value among different forest types and components. Pinus tabuliformis forest has the highest load,the lowest ignition point and equilibrium moisture content,which leads to the highest fire risk. Therefore,in the forest management and forest fire prevention in Longnan City,the management of Pinus tabuliformis forest fuel should be strengthened.关键词
陇南市森林/死可燃物特征/危险性评价/隶属函数模糊评价Key words
forest in Longnan City/characteristics of dead fuel/risk assessment/fuzzy evaluation of membership function分类
农业科技引用本文复制引用
王康锋,罗永忠,逯真佳,马立鹏,张存焘,郭鹏,马婧,赵亮生..陇南市主要森林类型死可燃物特征及危险性评价[J].北京林业大学学报,2024,46(8):132-138,7.基金项目
甘肃省生态资源监测中心省级林业草原资源保护与发展基金(701-03723041). （701-03723041）
