【摘要】 通过对河南主要土类土壤耕层的100个土壤样品进行抽样调查分析,并对其土壤类型、土壤质地、土壤有机质含量、土壤pH及土壤中重金属铬含量等项目进行测定,结果表明,不同土类耕层土壤铬含量有差异,其平均值大小(mg/kg)顺序为砂姜黑土(31.59)>黄褐土(26.48)>潮土(26.01)>褐土(24.58)>红黏土(22.20)>黄棕壤(19.74),且均未超过国家《土壤环境质量标准》(GB15618-1995)中规定的铬含量小于或等于90 mg/kg的标准。根据试验结果分析,不同土壤类型中的铬随着pH的升高而升高,有机质对土壤中铬的含量也有一定影响,土壤有机质含量越高土壤中铬含量也相对较高。更多还原

【Abstract】 Through sample investigation to 100 pieces of soil sample which distributed in Henan Province,soil type,texture,organic content,pH and heavy metal Cr were analyzed.The results indicate chromium content of soil varies with soil types.The order of average content of chromium is: shajiang black soils> yellow cinnamon soils>fluvo-aquic soils > cinnamon soils>red clay >yellow palmloamy soils,averaging 31.591,26.48,26.01,24.58,22.2,19.74 mg/kg respectively,lower than the content in the state"Environmental Quality Level of Soil"(BG15618-1995),which is less than or equal to 90 mg/kg.Analysis result suggested that chromium content rises along with pH value.Organic content also relates chromium content,and scil organic matter level is positively related with the Cr level.更多还原