不同功能区城市林业土壤黑碳含量及来源分析——以南京市为例.docVIP

..页眉.. PAGE 页脚..─ PAGE 1 ─ 稿件编号(stxb201404200775) 不同功能区城市林业土壤黑碳含量及来源分析 —以南京市为例 王曦1,2,杨靖宇1,俞元春1,2*,侯文军1,侯也1,余健3,王如海1,2 （1．南京林业大学生物与环境学院 南京 210037； 2．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；3．安徽师范大学国土资源与旅游学院，安徽芜湖 241003） 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。本研究以南京市为对象，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（δ13CPDB）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。 关键词：城市林业土壤；黑碳；含量；来源；南京市 Concentration and sources of black carbon in urban forest soils in different function areas of Nanjing, China WANG Xi1,2, YANG Jingyu1,YU Yuanchun1,2*,HOU Wenjun1,HOU Ye1, YU Jian3, WANG Ruhai1,2 1 College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China 2 State Key Laboratory of Soil and Sustainable Agriculture; Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China 3 College of Territorial Resources and Tourism, Anhui Normal University, Wuhu 241003, Anhui China Properties of soils in urban forests had been changed greatly due to the influence of human activities during the process of urbanization. The distribution of black carbon in urban forests soil shows large variation caused by the diversified origin and as a result of human activities. The concentrations and the potential origin of the black carbon in urban forest soil from different functional areas were studied. The results indicated that concentrations of black carbon in urban forest soil in different functional areas vary significantly from 0.77 g/kg to 21.27g/kg. The concentrations of soil black carbon in road side green belts areas were significantly higher than that of other functional areas and residential areas were the lowest. The concentration of black carbon in surface soil (0~10cm) were higher than that in subsurface soil (10~30cm) and black carbon was enriched in surface soil. The rati