芜湖城区表层土壤黑碳含量及分布特征

发布时间：2019-01-11 21:12

【摘要】：为了解城市化进程中人类活动对城市土壤黑碳积累的影响,以芜湖市区(分为镜湖区、鸠江区、弋江区、三山区和开发区)为例,采集154个表层土壤样品,测定土壤中黑碳及有机碳含量。结果表明,芜湖市土壤黑碳含量在0.02~26.16 g·kg~(-1)之间,平均值为5.87 g·kg~(-1),变异系数为62.98%;各功能区土壤黑碳含量平均值由高到低排序为镜湖区、鸠江区、三山区、弋江区和开发区;芜湖市土壤黑碳含量主要分布在5~10 g·kg~(-1)之间,占样品总数的50%。城市土壤黑碳与有机碳含量比值变幅为0.01~0.88,平均值为0.58,表明芜湖市城市土壤黑碳的主要来源为矿物燃料燃烧。各功能区黑碳含量分布存在较大空间差异,这与城市人为活动影响有密切关联。
[Abstract]:In order to understand the effect of human activities on the accumulation of black carbon in urban soils during the urbanization process, 154 surface soil samples were collected from Wuhu urban area (divided into Jinghu District, Hatojiang District, Yijiang District, Sanshan District and Development Zone). The content of black carbon and organic carbon in soil was determined. The results showed that the black carbon content of soil in Wuhu city was between 0.02 ~ 26.16 g kg~ (-1), the average value was 5.87 g kg~ (-1), and the coefficient of variation was 62.98 g / kg~ (-1). The order of average black carbon content of soil in each functional area from high to low is Jinghu District, Hatoyama District, Sanshan District, Yijiang District and Development Zone, and the black carbon content of soil in Wuhu City is mainly between 510 g kg~ (-1), accounting for 50% of the total samples. The ratio of black carbon to organic carbon in urban soil varies from 0.01 to 0.88, with an average of 0.58, indicating that the main source of black carbon in urban soil in Wuhu is fossil fuel combustion. The distribution of black carbon in different functional areas is different in space, which is closely related to the influence of urban human activities.
【作者单位】：安徽师范大学国土资源与旅游学院;安徽自然灾害过程与防治研究省级实验室;
【基金】：国家自然科学基金(41371480) 高等学校博士学科点专项科研基金(20123424120003)
【分类号】：X144

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