不同功能区城市林业土壤黑碳含量及来源——以南京市为例  

Concentration and sources of black carbon in urban forest soils in different functional areas of Nanjing,China

作　　者：王曦[1,2,3] 杨靖宇[1,2] 俞元春[1,2,3] 侯文军[1] 侯也[2] 余健[4] 王如海[1,3] 

机构地区：[1]南京林业大学南方现代林业协同创新中心,南京210037 [2]南京林业大学生物与环境学院,南京210037 [3]中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,南京210008 [4]安徽师范大学国土资源与旅游学院,芜湖241003

出　　处：《生态学报》2016年第3期837-843,共7页Acta Ecologica Sinica

基　　金：国家自然科学基金项目(31270664;41101529);高等学校博士学科点专项科研基金项目(20123204110004);江苏省普通高校研究生科研创新计划项目(CXZZ13_0533);国家级;省级大学生创新创业训练计划项目(201310298001Z);江苏高校优势学科建设工程项目(PAPD)

摘　　要：由于城市化过程中人为活动的影响,城市林业土壤的性质发生了很大变化。城市林业土壤黑碳由于来源的多样性和受到人为活动的影响,其分布表现出独特的特征。以南京市为对象,调查分析了不同功能区城市林业土壤黑碳的含量及可能来源。结果表明:不同功能区城市林业土壤黑碳含量差异很大,其变幅为0.77—21.27g/kg。道路绿化带土壤黑碳含量显著高于其它功能区,居民区含量最低。黑碳在土壤表层中含量均高于表下层,黑碳富集于土壤表层。道路绿化带表层土壤黑碳含量与有机碳含量的比值(BC/SOC)为0.55,土壤黑碳的碳同位素比值(δ^(13)C_(PDB))为-27.04‰,与其它功能区差异显著,城市交通污染对土壤黑碳积累产生强烈影响。Properties of soils in urban forests have been greatly altered by human activities during the process of urbanization. The distribution of black carbon in urban forest soils shows large variation resulting from its diverse origins and as a result of human activities. The concentrations and the potential origins of black carbon in urban forest soils from different functional areas were studied. Concentrations of black carbon in urban forest soils in different functional areas varied significantly, from 0.77 g/kg to 21.27 g/kg. The concentrations of black carbon in road side green belts soils were significantly higher than those in soils of other functional areas. Residential areas had the lowest concentrations of soil black carbon. The concentrations of black carbon in surface soil （0--10 cm） were higher than those in subsurface soil （10-- 30cm） and black carbon was enriched in surface soil. The ratio of black carbon to organic carbon （BC/SOC） in road greenbelt surface soils was 0.55. In roadside green belts areas, the carbon isotope ratio of soil black carbon （δ13CPDB ） was - 27.04‰, which is significantly different than that of other functional areas. These results indicate that the accumulation of black carbon in urban forest soils is strongly influenced by traffic pollution.

关 键 词：城市林业土壤 黑碳 含量 来源 南京市 

分 类 号：S714.2[农业科学—林学]