中文摘要：

基于野外样点实测数据,根据火烧迹地各组分生物量,构建了火烧烈度的量化指标：火烧烈度指数（Fire Severity Index,FSI）。依据构建的FSI,对过火林分的火烧烈度进行了量化分级,并通过野外记录的综合火烧指数（Composite Burn Index,CBI）,对FSI进行验证分析。结果表明：FSI能够直接量化火烧烈度严重性,可准确地揭示不同火烧烈度对林分生物量和碳储量的影响程度。

英文摘要：

Based on the field inventory data,the quantitative index of fire severity（Fire Severity Index,FSI） was established. The grading of fire severity was conducted by means of FSI. According to CBI（composite burn index） from fieldwork,verification of FSI was put in effect. The results showed that FSI could directly quantify fire severity and accurately reveal effect of different fire severities on forest biomass and carbon storage.