川东北茶区茶园土壤重金属现状分析

采用单因子指数和加权综合指数法对四川东部和东北部地区 16个县市的 6 9个茶园土壤样本中As、Cd、Cr、Cu、Hg、Pb、Zn、Ni元素含量进行了分析。结果表明 :目前该地区的茶园土壤环境按农业土壤环境质量监测标准分析基本适合种植茶树和生产符合卫生质量标准的茶叶。若按有机茶园土壤标准分析 ,该地区茶园土壤Pb、Cu、Zn和Ni等重金属元素含量未超标 ,但Cd、Hg、As和Cr的含量存在一定程度的超标。单因子指数分析结果超标样点的比例分别为 85 5 1%、6 3 77%、37 6 8%和 11 5 9% ,加权综合指数分析结果超标样点的比例为 4 3 4 8%。

Analysis on Contents of Heavy Metals in the Tea Garden Soils of Northeast in Sichuan Province

The contents of heavy metals: As, Cd, Cr, Cu, Hg, Pb, Zn, Ni etc in 69 soil samples of the tea garden in 16 counties and municipalities in northeast of Sichuan province are evaluated with index of single factor and compositive factors. The results show that: at the present, these soils are suitable to planting tea tree and to producing tea that suit health standard based on monitoring standard of environment quality. Based on standard of heavy metals content in soil of organic tea garden, Pb, Cu, Zn, Ni etc in soils of tea garden in northeast of Sichuan province are in standard, but some of soil samples are over standard for Cd, Hg, As and Cr, and proportion of over standard in soil samples are 85.51%、63.77%、37.68% and 11.59% respectively based on single factor index, and are 43.48% based on compositive factors.