摘要:
该文根据北京八达岭的自然条件和森林分布状况,对林区植被的易燃性进行了研究与分析.选取了八达岭林场121个小班作为研究对象,以其样地内的植物(树种)组成、郁闭度、坡度、坡向、海拔高度、灌草生物量、枯落物生物量、森林类型和平均枝下高等因子作为燃烧性分量,对各小班的燃烧性综合指标进行计算、排序,划分了5个燃烧等级,统计不同等级所包含小班的面积和所占百分比,并利用GIS绘制了八达岭林区燃烧等级分布图.结合目前所进行的森林健康经营,提出采用原生森林植被近自然恢复、游憩设施建设、现有林地肥力恢复降低火险等级综合措施、监测体系建设措施降低森林火险等级,对该地区森林防火具有一定的指导意义.
Abstract:
Based on the natural conditions and existing forest distribution at the Badaling Forestry Center of Beijing,this study was largely concerned with the combustibility of forest vegetation.One hundred and Twenty-one representative sample areas were selected to study the composition of plants(trees),crown density,slope,elevation,shrub and grass biomass,litter biomass,forest types and the average height of the lower branches.These variables were treated as the combustion vectors for the calculation and ordination of a comprehensive index for each sub-compartment.Given this information,the authors divided the combustibility into five ratings to conform to the existing information and practices of the Badaling Forestry Center.We suggested a renewal of the original forest management plans for the initiation of eco-tourism and the optimization of current forest functions.Particularly,we urged a renewed effort to increase soil fertility,prevent forest fires and establish an inspection system to obtain a lower forest fire rating.These measures should set an example for sound forest management in the region.
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