| 刘琼峰,李明德,段建南,魏文学,吴海勇.长沙城郊农田土壤重金属Pb、Cd的生态风险评价研究[J].农业环境科学学报,2013,32(8):1564-1570. |
| 长沙城郊农田土壤重金属Pb、Cd的生态风险评价研究 |
| Ecological Risk Assessment of Heavy Metals of Pb and Cd in the Suburban Cropland Soils in Changsha |
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| DOI：10.11654/jaes.2013.08.011 |
| 中文关键词: 农田土壤 重金属 Pb Cd 生态风险评价 |
| 英文关键词: agricultural soil heavy metal Pb Cd ecological risk assessment |
| 基金项目: |
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| 摘要点击次数: 2863 |
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| 中文摘要: |
| 采集长沙城郊18个乡镇513个农田土壤样点，运用模糊综合评价法和层次分析法从农田土壤重金属Pb、Cd的含量、土壤理化特性（pH值、有机质、碱解氮、有效磷）、土壤区位特征（土壤采样点离城镇的距离、离建设用地的距离、离河流的距离、离农村居民点的距离）3个方面选取评价指标，建立农田土壤重金属Pb、Cd的生态风险评价模型，并根据生态风险指数值（ERI）将生态风险等级划分为四级（Ⅰ级ERI>0.70、Ⅱ级0.6 |
| 英文摘要: |
| The purpose of this study was to assess the ecological risk of heavy metals Pb and Cd in suburban agricultural soils in Changsha, the capital city of Hunan Province. A total of 513 surface soil samples（0~20 cm） were collected from paddy fields and upland covering whole city region, and the concentrations of Pb and Cd were analyzed. Fuzzy comprehensive evaluation and analytic hierarchy process were applied to establish ecological risk assessment models of Pb and Cd contamination, and evaluation indics（ERI） were set up based on Pb and Cd concentrations, soil physicochemical properties and soil location characteristics. The indics of soil physicochemical properties were soil pH, organic matter, alkali-hydro nitrogen and available phosphorus, while the indics of soil location characteristics were the distance from cropland to town, industrial construction land, river, and settlement. The ecological risk grade was divided to four ranks according to the values of ecological risk index, ERI>0.70, 0.6 |
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