基于森林资源清查的江西省森林贮碳功能研究

Forest Carbon Sink of Jiangxi Province Based on Forest Resource Inventory Data

利用江西省1999—2003年森林资源二类清查资料,结合大岗山森林生态站的实测数据以及已公布的调查资料,运用材积源生物量法对江西省森林的碳储量和碳密度进行了估算和评价。结果表明,江西省不同类型森林乔木层碳密度,由大到小依次为硬阔林、针阔混交林、毛竹林、国外松林、杉木林、软阔林、灌木林、马尾松林和经济林,且碳密度随着林龄的增大而增大,随人口密度的增大而减小。森林碳密度土壤层最大,植被层次之,枯落物层最小。不同森林类型乔木层碳储量,由大到小依次为杉木林、硬阔林、马尾松林、毛竹林、灌木林、国外松林、经济林、针阔混交林、软阔林。从森林类型分布看,除杉木和国外松林外,其他森林类型天然林乔木层碳储量远大于人工林;从地理分布看,除南昌、萍乡、新余三市外,其余各市均是天然林乔木层碳储量远大于人工林。不同年龄森林乔木层碳储量,由大到小依次为中龄林、幼龄林、近熟林、成熟林、过熟林。不同森林碳储量由大到小依次为杉木林、马尾松林、硬阔林、灌木林、经济林、毛竹林、针阔混交林、国外松林和软阔林,南部和中西部要高于中东部和北部。江西省森林总碳储量为1.5Gt,占全国森林总碳储量的5.33%。

The forest resource inventory data of Jiangxi during 1999 to 2003, the data from Dagangshan mountain forest ecological station and other publicized data are used to evaluate the forest carbon storage and density in Jiangxi. The results indicate that the carbon densities for different trees size down as follows： hardwood forest, mixed broadleaf-conifer forest, pubescence forest, exotic pine forest, fir forest, softwood forest, shrubbery, masson pine forest and economic forest. The carbon density increases with the forest age and decreases with the population density increase. The larger to smaller carbon densities appear in soil layer, vegetation layer and the litter layer orderly. Tree stratum carbon storage size down as follows： fir forest, hardwood forest, masson pine forest, pubescence forests, shrubbery, exotic pine forest, economic forest, mixed coniferous forest, broad leaf forest and softwood forest. Tree stratum carbon storage of natural forest is larger than that of plantation except fir and exotic pine forests. Geographically, Tree stratum carbon storage in natural forests is larger than that in plantations except in Nanchang, Pingxiang and Xinyu. Carbon storages of tree stratum for different ages size down as follows： middle age forest, young forest, near mature forest, mature forests and over mature forest. Carbon storages for different forests size down as follows： fir forest, masson pine forest, hardwood forest, shrubbery, economic forest, pubescence forest, mixed coniferous and broad leaf forest, exotic pine forest and softwood forest. The total carbon storage of forests in Jiangxi is 1.5 Gt C, 5.33% of China.