青岛市土壤酸沉降临界负荷估算  

Critical Loads of Acid Deposition on Soils in Qingdao City

作　　者：杜金辉[1] 孙娟[1] 杜廷芹[1] 慕金波[1] 

机构地区：[1]山东省环境保护科学研究设计院,山东济南250013

出　　处：《中国环境管理干部学院学报》2015年第1期4-8,共5页Journal of Environmental Management College of China

基　　金：山东省科技发展计划项目<山东省土壤环境容量及酸沉降临界负荷研究>(2006GG3206002)

摘　　要：在GIS支持下,应用简单质量平衡法对青岛市土壤硫和氮沉降临界负荷进行了估算。结果表明:青岛市土壤硫沉降临界负荷低值区主要位于东南、西南和北部的植被覆盖区域。植被盐基吸收速率较高、降水盐基阳离子总量和土壤风化速率较低以及土壤偏酸性是造成土壤硫沉降临界负荷偏低的原因。耕地区域氮沉降临界负荷较高,植被覆盖区则较低。较低的植被对氮的吸收速率、土壤临界氮淋溶以及反硝化率是导致氮沉降临界负荷数值偏低的原因。With the support of the Geographic Information System （GIS） , the critical loads of the sulfur and nitrogen deposition on soils in Qingdao City were estimated used the simple mass balance method. Results demonstrated that the lower critical loads of the sulfur deposition on soils are mainly distributed in the areas covered with vegetation in the southeast, southwest and north of Qingdao City. The higher base cations uptake rate of vegetation, the lower total base cations in precipitation, the lower soil weathering rate and acid soils caused the lower critical loads of the sulfur deposition on soils. The critical loads of the nitrogen deposition on soils are higher in cultivated land areas and lower in areas covered with vegetation. The lower critical loads of the nitrogen deposition on soils are ascribed to the lower nitrogen uptake rate of vegetation, the lower critical nitrogen leaching as well as the lower denitrification fraction in soils.

关 键 词：简单质量平衡法 硫沉降 氮沉降 主要土壤类型 临界负荷 

分 类 号：X825[环境科学与工程—环境工程]