基于二类调查数据的森林植被碳储量和碳密度——以徐州市为例

Carbon Storage and Carbon Density of Urban Forest Vegetation Based on Forest Resource Inventory Data: A Case Study of Xuzhou City

基于2009年徐州市森林资源二类调查数据,运用生物量换算因子连续函数法研究了徐州城市森林植被碳储量和碳密度。结果表明:徐州城市森林植被碳储量为1.934 8 Mt,植被碳密度为37.218 5 t.hm-2。徐州城市森林植被碳储量均由人工林提供。森林植被碳储量按林分类型划分,从大到小依次为:阔叶林、针叶林、针阔混交林;按不同林龄划分,从大到小依次为:中龄林、幼龄林、近熟林、成熟林和过熟林。森林植被碳密度的特征为:阔叶林>针叶林>针阔混交林,且随着林龄的增加而增大。建议对现有侧柏人工林过密林分,通过间伐、开设林窗等措施,把侧柏纯林改造为针阔混交林。该研究可为今后徐州城市森林的综合经营和管理提供一定的科学依据。

Biomass expansion factor was used to evaluate the carbon storage and carbon density of urban forest vegetation in Xuzhou City based on the data of forest resource inventory in 2009. Results showed that the carbon storage of forest vegeta- tion was 1. 934 8 Mt, and carbon density was 37. 218 5 t/hm2. The carbon storage of urban forest vegetation in Xuzhou was provided by the plantations. The carbon storage of broad-leaved forest is the highest, followed by coniferous forest, and co- niferous and broad-leaved mixed forest. The carbon storage of middle-aged forest is the highest, followed by young forest, pre-mature forest, mature forest, and over-mature forest. The carbon density of broad-leaved forest is the highest, followed by coniferous forest and coniferous and broad-leaved mixed forest, and increased with forest age. According to the current status of the plantations, thinning and opening forest gaps should be taken for overcrowding P. orientalis plantations in or- der to transform the stand to be a coniferous and broad-leaved mixed forest.