【摘要】 为确定影响滕州地区表层土壤硒含量变化的因素,对研究区土壤的地球化学指标进行统计分析,结果显示,研究区土壤硒背景值为0.08mg/kg,异常下限值为0.17 mg/kg,表层土壤硒平均含量为0.23 mg/kg,标准差为0.144 mg/kg,变异系数为62.6%。综合相关性分析、主成分分析以及富集因子分析结果,表明表层土壤硒异常主要受人为因素的影响。不同区域表层土壤硒含量由高到低依次为煤矿区>交通繁忙区>农田区。在土壤垂直方向上,煤矿周边土壤中硒含量自下而上增加的趋势要明显快于不受煤矿直接影响的区域,同时前者的变化速率和转折端的出现均快于后者。因此,滕州地区表层土壤硒异常主要受煤矿开发的影响。更多还原

【Abstract】 The soil geochemical data in Tengzhou were analyzed statistically to determine the factors influencing Se content in topsoil. The results showed that the background value of soil Se was 0.08 mg/kg with the lower limit of abnormality was 0.17 mg/kg. The average content of topsoil Se was 0.23 mg/kg with the standard deviation of 0.144 mg/kg and the variation coefficient of 62.6%. The analysis results of soil index correlation, principal components and enrichment factor calculation found that topsoil Se anomaly was mainly influenced by human factors, and topsoil Se contents in different regions was in order of coal mining areas> heavy traffic areas> farmland. In the vertical direction of soil profile, Se content decreased faster in soils around coal mines than in soils not directly affected by coal mines, at the same time, the change rate was greater and the turning point appeared earlier in the former than the latter. Therefore, Se anomaly in topsoil in Tengzhou is mainly affected by coal mining.更多还原