摘要
以陕西 93种树种的枝为试样 ,在 2 40℃条件下对可燃性气体逸出率及其变化的测定表明 :可燃性气体逸出率和时间之间的关系符合模型V =a +b/t;在 2 40℃条件下 ,以 1 0min时段内的气体逸出率变化最大 ,用此指标选择抗火树种效果明显 ,可燃性气体逸出程度作为评价树种燃烧性的一个指标 ,为防火树种的选择提供了依据 .就该温度条件下气体释放程度考虑 ,栓皮栎、紫薇、山杨、栾树、榛子、铁杉、青木千、梨、短柄泡、牛奶子。
Through the measure of escape ratio and varance of combustible gas on 93 species in Shaanxi at 240℃ the authors have showed that the relation between escape ratio and heated time can be described by model V = a + b /t,the variance of escape ratio during 10 minutes is the biggest among 6 different heated periods at 240℃ which means this index has an obvious effect on selection of fire resistance tree,and can be used as one of theoretical evaluation evidence for woody plant combustibility.According to gas release at 240℃,the fire resistance of Quercus variabilis,Lagerstroemia indica,Populus davidiana,Corylus heterophylla,Elaeagnus umbellata,Koeleuteria paniculata.,Picea wilsonii,Tsuga chinensis,Prunus armeniaca,Pyrus sp., Quercus glandulifera var. brevipetiolata is higher than the other mentioned species,and can be used as good fire prevention trees.
出处
《西南林学院学报》
1999年第3期176-181,共6页
Journal of Southwest Forestry College
基金
陕西省科学技术项目!"防火林带工程建设技术与网络体系研究
关键词
气体逸出率
燃烧性
抗火树种
生物防火
Combustible gas escape ratio
Combustibility
Fire prevention tree species
