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中文摘要：
以吉林省长春市为例，研究了几种不同利用方式（包括城区街道、城区广场、城区公园、近郊菜地、近郊耕地）表层（0～20cm）土壤中总有机碳、水溶性有机碳、易氧化有机碳、颗粒有机碳和黑碳的数量特征。结果表明：与菜地和耕地相比，城区（即街道、广场、公园）土壤中总有机碳、水溶性有机碳、易氧化有机碳、颗粒有机碳和黑碳均存在富集现象，其中街道土壤中总有机碳、颗粒有机碳和黑碳的富集现象更加明显，而广场和公园土壤中水溶性有机碳和易氧化有机碳的富集现象更加明显；从土壤有机碳组分的分配比例（即各组分有机碳占总有机碳含量的百分比）来看，城区土壤中各有机碳组分的分配比例均高于菜地和耕地，其中街道土壤中颗粒有机碳和黑碳的分配比例高于广场和公园，而水溶性有机碳和易氧化有机碳的分配比例则低于广场和公园。城区特殊的环境条件决定了土壤有机碳数量特征不同于近郊的菜地和耕地土壤，而城区土壤中有机碳数量特征亦受到土地利用方式的影响。
英文摘要：
Urban soil organic carbon plays an important role in the regional and global carbon cycle. The quantitative characteristics of the total organic carbon （TOC）, water soluble organic carbon （WSOC）, easily oxidizable organic carbon （EOC）, particular organic use patterns （including urban street, urban square, urban park, suburban vegetable land, suburban arable land） in Changchun city,carbon （POC） and black carbon （BC） were analyzed of 95 soil samples collected from 0--20 cm soil layer under five different land Jilin province, China. Compared with the vegetable and arable soils, the TOC, WSOC, EOC, POC and BC were more abundant in the urban soils. Among the urban soils, the TOC, POC and BC were more in the street soils, while the WSOC and EOC were higher in the square and park soils. On the other hand, the proportions of the organic carbon fractions （i. e. WSOC, EOC, POC, BC） to the TOC of soils were also higher in the urban than in the suburban areas. And the proportions of the POC and BC were more in the street than in the square and park soils, but that of WSOC and EOC were less in the former soils. Because of the specific environmental conditions within the urban areas, the quantita- tive characteristics of organic carbon of urban soils differ from those of the neighboring vegetable and arable soils. And the quantitative characteristics of the soil organic carbon within the urban areas are also different under the different land use patterns.
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