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1950—2008年间江西省年均发生森林火灾762次、年均过火面积1.578×104hm2.本文利用江西省森林火灾统计数据,结合气象、森林分布和历次森林清查数据,分析了该省林火的特征,估算历年的林火碳释放量和碳转移量.结果表明:1950—2008年江西省森林火灾导致的森林生物量总损失约61.155 Tg,活生物量碳库损失约30.993 Tg C,占全省植被碳库的15.92%.20世纪70年代以前林火生物量碳损失率约占1950—2008年生物量总碳损失的74.3%;90年代以后,年均林火生物量碳损失小于0.097 Tg C.森林火灾释放的CO2、CH4和CO气体分别为5.408 Tg、0.047 Tg和0.486 Tg,有22.436 Tg C活生物量碳进入土壤碳库.2008年初雨雪冰冻灾害引发的高频率次生林火灾害导致森林活生物量碳损失(0.463 Tg C)是前5年平均值(0.181 Tg C)的2.56倍.
In 1950-2008, there were 762 forest fires annually in Jiangxi Province, with an average annual burning area of 1.578 × 104hm2.In this paper, the characteristics of forest fires in this province were analyzed based on the statistics of forest fires in Jiangxi Province and the meteorological data, forest distribution and previous forest inventory data , And estimated carbon emissions and translocation of forest fire over the years.The results showed that the total forest biomass loss caused by forest fires in Jiangxi Province in 1950-2008 was about 61.155 Tg and the loss of living carbon stocks was about 30.993 Tg C, 15.92% of the vegetation carbon pool.The carbon loss rate of biomass before 1950s accounted for 74.3% of total carbon loss of biomass in 1950-2008. After the 1990s, the average annual biomass carbon loss of forest fire was less than 0.097 Tg C The CO2, CH4 and CO gases released by forest fires were 5.408 Tg, 0.047 Tg and 0.486 Tg, respectively, and 22.436 Tg C was released into the soil carbon pool.The high frequency secondary forest fire disaster caused by the snow and ice disaster in early 2008 led to the forest The loss of viable biomass (0.463 Tg C) is 2.56 times the average of the first 5 years (0.181 Tg C).