北京地区5个针叶树种抗火性研究

Research on fire resistance of 5 conifer speciesin Beijing area

冬春季节,是北京地区森林火灾的高发期。为了选取合适营造生物防火林带的树种,阻止森林火灾蔓延,减少森林火灾带来的损失,对北京地区5个常见针叶树种抗火性进行了研究。分别测定了不同针叶树种树皮和树叶的含水率、树皮厚度、树叶表面积与体积比、树叶燃点、树叶热值和树叶粗灰分含量等指标,利用因子分析法对树种的抗火性能进行综合评价和排序,通过对不同树种的7个抗火性单变量进行因子分析,得出5个树种抗火性能的综合排序为:刺柏>白皮松>油松>圆柏>侧柏。

Winter and spring season is the peak period of forest fire in Beijing.In order to select appropriate tree species to build biological fire prevention forest,prevent forest fire spread-ing,reduce the loss of forest fire,fire resistance of five common conifer in Beijing was studied.The moisture content,bark thick-ness,ratio of leaf surface area to volume,leaf burning point,leaf calorific value and leaf coarse ash content of the barks and leaves of different coniferous trees were measured.Factor analy-sis was used to comprehensively evaluate and sort the fire resis-tance of the tree species.Through the analysis of 7 fire resis-tance univariate factors of different tree species,the comprehen-sive order of fire resistance of 5 tree species is:Juniperus For-mosana Hayata>Pinus Bungeana Zucc>Pinus Tabuliformis-Carr>Juniperus Chinensis Linnaeus>Platycladus Orientalis(L.)Franco.