在“森林燃烧”的讲座中,曾谈过森林燃烧必须具备三个条件,即可燃物,一定温度(火源)和氧气(助燃物),如果三者缺一,森林就燃烧不起来。但森林是生长在一个开放性系统的自然环境中,并不是密闭的,当森林发生火灾时,一般来说氧气的供给是不缺乏的,同时也是无法进行人为控制的,所以在防火季节内,对氧气是很难进行考虑的,而主要涉及到的是,发生森林火灾的火险天 In the talk of “forest burning,” we talked about the three conditions that must be met for forest burning: combustibles, certain temperatures (sources of ignition) and oxygen (combustibles). If the three are missing, the forest can not burn. However, the forest is an open system of natural environment is not closed, when the forest fire, the oxygen supply is generally not lacking, but also can not be artificially controlled, so in the fire season, Oxygen is difficult to consider, but the main concern is that the fire of the forest fire days