福州城市边缘区果园土壤Pb Cu分布特征与潜在生态风险评价  

Pb,Cu Distribution Characteristics and Potential Ecological Risks Assessment in Orchard Soils in the Urban Fringe of Fuzhou,China

作　　者：马军[1] 刘爱琴[1] 侯晓龙[1] 

机构地区：[1]福建农林大学林学院,福州350002

出　　处：《农业环境科学学报》2010年第2期308-313,共6页Journal of Agro-Environment Science

基　　金：福建省科技厅重点项目(2008Y0004);福建省自然科学基金(2009J01051)

摘　　要：采用现场采样及室内分析方法,从水平和垂直角度研究了福州城市边缘区果园土壤Pb、Cu全量及其HCl、DTPA两种浸提态含量分布特征,利用潜在生态风险指数法评价土壤Pb、Cu潜在生态风险。结果表明,福州城市边缘区果园土壤Pb、Cu存在一定程度的污染,且Pb污染比Cu严重,不同浸提态Pb、Cu含量与其全量呈正相关,与pH呈负相关;Pb、Cu潜在生态风险处于轻微程度。Field investigation and sampling, lab experiments were used to analysis the distribution of Pb, Cu total contents and concentration of HCl, DTPA, extravtion state in orchard soil of urban fringe in fuzhou. Potential ecological risk index method was used to evaluate soil pollution. The results showed that ： Pollution characteristics of Pb, Cu in orchard soil in Fuzhou urban fringe was similar, which generally formed Pb, Cu composite pollution. Pb pollution was generally more serious than Cu pollution. Pb, Cu contents were significantly higher in soils surrounding highways and old industrial areas, and more easily absorbed by plants. Vertical distribution of Pb, Cu total contents and state extraction had certain differences due to sampling area and types of heavy metals. Correlation analysis showed that Pb, Cu and their extraction states had a total degeneration, and different extraction agents had strong consistency on the extraction of heavy metals; Soil pH value had no correlation with Pb, Cu contents, but had negative correlation with Pb, Cu extraction states. Evaluation showed that the potential ecological risks of Pb, Cu contents in 10 plots were in slight pollution.

关 键 词：果园土壤 重金属 浸提态 潜在生态风险 福州城市边缘区 

分 类 号：X820.4[环境科学与工程—环境工程]