城市生态系统土壤碳库特征

与自然土壤相比,城市生态系统的土壤性质发生了显著的变化。城市化过程不仅改变了城市生态系统土壤碳库的规模,而且也改变着城市土壤有机质组成及土壤微生物碳的特性,而这些特征在城市区域内随着功能区、土地利用类型和历史、绿地管理措施以及原背景自然生态系统的不同而呈现出较大的空间变异性。本文从城市土壤碳库、城乡梯度上的土壤碳库变化、城市土壤微生物与土壤碳库、城市土壤黑碳等几个方面对国内外相关研究进展进行了综述,提出了国内相关研究的发展前景。

Characteristics of soil carbon pool in urban ecosystem

Compared with natural soil, urban soil had great changed properties. Urbanization changed not only the size of soil carbon pool, but also the composition of soil organic matter and the features of soil microbial biomass carbon. All of the changes represented greater spatial variability with the difference of functional regionalization, land use types and history, green-space management measures, and background natural ecosystems. This paper reviewed the research advances on the characteristics of soil carbon pool in urban ecosystem, including the changes of soil carbon pool along urban-rural gradient, urban soil microbial carbon, and urban soil black carbon. The prospects for the future research in China were put forward.