论生态平衡和林火烈度

 本文探讨林火对森林生态系统的干扰，提出火烈度指标作为衡量标准。建议采用林木蓄积量作为森林生态系统的状态指数。根据林火蔓延过程的物理分析，导出一种模型化的燃烧蔓延方程，并对兴安落叶松(Larix gmelinii)在不同蔓延速度下计算了火烈度。结合火烧迹地调查资料指出在不同火烈度下，林火对森林生态系统的影响及其对策。

DISCUSSION ON ECOLOGICAL BALANCE AND FOREST FIRE DESTRUCTIVE FORCE (FOREST FIRE SEVERITY INDEX)

This paper discusses the interference of forest fire in forest ecosystem proposes to use the forest fire destructive force which called FOREST FIRE SEVERITY INDEX (FFSI) as a measuring standard and also suggests to use the volume of forest (timber) as the index of the state of its forest ecosystem. According to the physical analysis of the process of the spreading of forest fire, a combustion spreading equation is deduced as a model and the destructive force of the fire of the Xingan-mountain larches is calculated at different spreading speeds. On the basis of the investigation results of the consumptive available fuels, the authors point out how forest fire influences forest ecosystem at different levels of FFSI and how forest fire should be dealt with according to its intensity.