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时间:2020-05-20
《长沙城郊农田土壤重金属Pb、Cd的生态风险评价研究-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2013,32(8):1564—1570农业环境科学学报2013年8月JournalAgro-EnvironmentScience长沙城郊农田土壤重金属Pb、Cd的生态风险评价研究刘琼峰,一,李明德,段建南,魏文学,吴海勇(1.湖南省土壤肥料研究所,长沙410125;2.湖南农业大学资源环境学院,长沙410128;3.中国科学院亚热带农业生态研究所,长沙410125)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Ph、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
2、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0.63、供参考。关键词:农田土壤;重金属;Pb;Cd;生态风险评价中图分类号:S159.2文献标志码:A文章编号:1672—2043(2013)08—1564—07doi:10.11654~aes.2013.08.011EcologicalRiskAssessmentofHeavyMetalsofPbandCdintheSuburbanCroplandSoilsinChangshaLIUQiong-fengLIMing-de,DUANJian-nan,WEIWen-xue,wuHai-yong(1.SoilandFertilizerInstituteofHunanProvince,Changsha4、410125,China;2.CollegeofResourceandEnvironment,HunanAgriculturalUniversity,Changsha410128,China;3.InstituteofSubtropicalAgriculture,theChineseAcademyofSciences,Changsha410125,China)Abstract:ThepurposeofthisstudywastoassesstheecologicalriskofheavymetalsPbandCdinsuburbanagriculturalsoilsinChangsha,t5、hecapitalcityofHunanProvince.Atotalof513surfacesoilsamples(0-20cm)werecollectedfrompaddyfieldsanduplandcoveringwholecityregion,andtheconcentrationsofPbandCdwereanalyzed.FuzzycomprehensiveevaluationandanalytichierarchyprocesswereappliedtoestablishecologicalriskassessmentmodelsofPbandCdcontamination6、,andevaluationindics(ERI)weresetupbasedonPbandCdconcentrations,soilphysicochemica1propertiesandsoillocationcharacteristics.Theindicsofsoilphysic0chemicalpropertiesweresoilpH,organicmatter,alkali—hydronitrogenandavailablephosphorus,whiletheindicsofsoillocationcharacte~sticswerethedistancefromcropla7、ndtotown,industrialconstructionland,fiver,andsettlement.Theecologicalriskgradewasdividedtofourranksaccordingtotheval-uesofecologicalriskindex,ERI>0.70,0.6
3、供参考。关键词:农田土壤;重金属;Pb;Cd;生态风险评价中图分类号:S159.2文献标志码:A文章编号:1672—2043(2013)08—1564—07doi:10.11654~aes.2013.08.011EcologicalRiskAssessmentofHeavyMetalsofPbandCdintheSuburbanCroplandSoilsinChangshaLIUQiong-fengLIMing-de,DUANJian-nan,WEIWen-xue,wuHai-yong(1.SoilandFertilizerInstituteofHunanProvince,Changsha
4、410125,China;2.CollegeofResourceandEnvironment,HunanAgriculturalUniversity,Changsha410128,China;3.InstituteofSubtropicalAgriculture,theChineseAcademyofSciences,Changsha410125,China)Abstract:ThepurposeofthisstudywastoassesstheecologicalriskofheavymetalsPbandCdinsuburbanagriculturalsoilsinChangsha,t
5、hecapitalcityofHunanProvince.Atotalof513surfacesoilsamples(0-20cm)werecollectedfrompaddyfieldsanduplandcoveringwholecityregion,andtheconcentrationsofPbandCdwereanalyzed.FuzzycomprehensiveevaluationandanalytichierarchyprocesswereappliedtoestablishecologicalriskassessmentmodelsofPbandCdcontamination
6、,andevaluationindics(ERI)weresetupbasedonPbandCdconcentrations,soilphysicochemica1propertiesandsoillocationcharacteristics.Theindicsofsoilphysic0chemicalpropertiesweresoilpH,organicmatter,alkali—hydronitrogenandavailablephosphorus,whiletheindicsofsoillocationcharacte~sticswerethedistancefromcropla
7、ndtotown,industrialconstructionland,fiver,andsettlement.Theecologicalriskgradewasdividedtofourranksaccordingtotheval-uesofecologicalriskindex,ERI>0.70,0.6
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