湖南省森林植被的碳贮量及其地理分布规律

Carbon Storage of Forest Vegetation and Its Geographical Distribution in Hunan Province

基于湖南省第4次(1990～1995年)森林资源调查资料,结合生物量测定数据,估算了湖南省森林植被的碳贮量和碳密度,分析了它们的地理分布规律和植被类型特性.结果表明:湖南省森林植被碳贮量为173.974Tg,在14个地州市中,怀化市的森林植被碳贮量最大,为31.047Tg,其它依次是永州市、郴州市和邵阳市,它们的森林植被碳贮量分别为21.527、19.306和19.239Tg,各森林类型中,杉木林的碳贮量最大,为51.588Tg,占湖南省碳贮量的29.65%;湖南省森林植被的平均碳密度为15.88t·hm-2,各地州市森林植被的平均碳密度变化为12.01～17.95t·hm-2,各森林类型中阔叶林的碳密度最大,为32.45t·hm-2,是湖南省森林植被平均碳密度的2倍多.

The carbon storage and density of forest vegetation in Hunan Province were estimated based on the data from the 4th forest resource inventory(1990～1995)and the measured biomass equation of different forest categories. The results show that the total carbon storage and the average carbon density of forest vegetation in Hunan accounts for 173.974 Tg and 15.88 t·hm^(-2) respectively. Among 14 prefectures, Huaihua possesses the largest carbon storage of 31.047 Tg. The carbon storages of forest vegetation in Yongzhou, Chengzhou and Shaoyang rank in the next three places with the values of 21.527, 19.306, 19.239 Tg respectively. The average carbon density in different prefectures ranges from 12.01 to 17.95 t·hm^(-2). In terms of forest categories, Cunninghamia lanceolata forest has the largest carbon storage of 51.588 Tg, occupying 29.65% of the total carbon storage in Hunan. The broad-leaf forest has the highest carbon density of 32.45 t·hm^(-2), which is 2 times as many as the average value of carbon density in Hunan.