【摘要】 对青岛市花生产地土壤重金属Cd、Hg、As、Pb、Cr、Cu、Zn和N i的含量进行了调查分析,并采用单项质量指数与综合质量指数相结合的方法对环境质量状况进行了评价。结果表明,各重金属的平均含量均低于"食用农产品产地环境质量评价标准"(HJ 332-2006)规定的限值,土壤环境质量定为1级,属于清洁水平,适宜发展无公害花生生产。但莱西一个监测点的土壤样品重金属Cu、Ni含量超标。若以国家土壤自然背景值为标准,Cu的超标率增加了将近3倍,表明Cu在土壤中已经产生了一定的积累。Hg与As的含量呈显著负相关(P<0.05),Hg和Ni、Cr与Cu之间呈显著正相关(P<0.05),其它元素之间的相关性未达到显著水平。推测个别元素超标的情况仅属于点源污染,不会引起复合污染。青岛市3个花生优势产区莱西、平度、即墨土壤重金属的环境质量均属于1级,适宜作为无公害花生的生产基地。更多还原

【Abstract】 Contents of heavy metals Cd,Hg,As,Pb,Cr,Cu,Zn and Ni in soil of peanut farmland of Qingdao were investigated.The soil quality was evaluated by methods of single quality index and comprehensive quality index.Results showed that the average contents of heavy metals in soil were all under the threshold prescribed by "Farmland environmental quality evaluation standards for edible agricultural products"(HJ332-2006).The soil quality was considered the first class belonging to clean level and was suitable for growing non-environmental pollution peanut.But contents of heavy metals Cu and Ni in one of the soil samples of Laixi exceeded the standard.Cu content was nearly 3 times above the standard of nation natural background value,which showed the accumulation of Cu in soils.Hg and As content were significantly negatively correlated and Hg and Ni,Cr and Cu content were significantly positively correlated.The correlation among other elements did not reach a significant level.It was suggested that the pollution of excessive individual content was limited and did not result in further multiplex pollution.The soil heavy metal of the three predominant farmlands of Qingdao,Laixi,Pingdu and Jimo,all met the first level of environmental quality and were fit as the production bases of non-environmental pollution peanut.更多还原