次生林燃烧性的探讨

以影响森林燃烧的各因子火险性的大小作为依据，综合控制林火发生的内因，可以从根本上剔除火灾隐患，通过对柞木林，柞桦林，山杨林，杨桦林，桦木林和水曲柳林等林型的燃烧性比较，及几种森林特征与燃烧的关系的研究，结果表明，柞木林燃烧性较大，杨桦，椴树林次之，水曲柳林安全可靠，同时也表明次生林在林分密度较大，林龄３０ａ左右，一天中１３－１５时燃烧性最高，从而为林火系统控制提供根据。

Discussion of Combustion Properties of the Secondary Forest

Depending on the fire insurance size of every factor effected forest combustion,and con-trolling the internal factors of forest fire comprehensively,the hidden dangers can be picked out radical-ly.By the comparason of the combustion properties to oak forest,oak and birch forest,poplar forest. poplar and birch forest,birch forest and manchurian ash forest,and the relationships between several for-est characters and combustion properties,the results show that the combustion property of oak forest isrelative big,and of poplar,linden and birch forest are the second,manchurian ash forest is safety and de-pendability,at the same time,the combustion property of the secondary forest is the heighest on the con-dition of bigger forest stand density,30 ages of stand and from thirteen to fifteen in one day.Thus,it pro-vides some data for the system control of the forest fire.