沈阳市新城子区土壤重金属元素的空间变异性  

Spatial variability of heavy metals in soils of the Xinchengzi District,Shenyang,Liaoning,China

作　　者：杨志斌[1] 杨忠芳[1] 冯海艳[1] 杨晓波 刘爱华[1] 李伟[1] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083 [2]辽宁省地质矿产调查院,辽宁沈阳110032

出　　处：《地质通报》2007年第11期1480-1485,共6页Geological Bulletin of China

基　　金：中国地质调查局地质调查工作项目<辽宁省辽河流域农业地质-区域生态地球化学评价>[编号:基(2005)011-09]资助

摘　　要：利用地质统计学方法,系统地研究了沈阳市新城子区土壤重金属元素的空间分布及空间变异性特征。研究结果显示,土壤中Cd和Pb的含量明显高于全国平均值和辽宁省土壤背景值。变异函数分析结果表明,Hg具有明显的空间自相关性,Cd、Pb和As均具有中等空间自相关的特征。Cd和Pb含量较高,并呈显著的正相关,主要受灌溉、施肥等外在因素的影响。重金属元素空间变异性的研究对当地土壤环境评价和土地质量评估具有一定的指示和引导作用。The spatial variability and distribution of heavy metals in soils in the Xinchengzi District, Shenyang, were studied systematically using the geostatistical method. The results of the study show that the contents of Cd and Pb in soils are markedly higher than the average value of the country and the background values of soils in Liaoning Province. Variation function analysis indicates that： Hg shows distinct spatial autocorrelation; Cd, Pb and As have the features of moderate spatial autocorrelation; Ca and Pb have higher contents and show significant positive correlation, which is mainly due to the influence of external factors such as irrigation and fertilizer application. The study of the spatial variability of heavy metals has certain guiding and indicative significance for the evaluation of the local soil environment and land quality assessments.

关 键 词：沈阳市 土壤重金属元素 空间变异性 地质统计学 半变异函数 

分 类 号：P595[天文地球—地球化学]