福建沿海地区农田土壤理化性质与重金属含量的关系

The Relationship between Physical and Chemical Properties of Soil and Heavy Metal Content in Fujian Coastal Farmland

对福建沿海地区农田土壤理化指标与重金属含量进行了调查,在此基础上探讨了土壤理化性质与土壤重金属含量之间的相关性,初步分析了土壤理化性质对重金属含量的影响。结果表明,福建沿海地区农田土壤的平均pH 5.56;土壤有机质含量为30.20 g/kg,属中上水平;土壤的其他养分含量也达到中上水平。土壤中Pb含量与土壤全氮含量相关显著;土壤中Hg含量与土壤有机质和阳离子交换量相关显著;其他理化指标与重金属含量相关不显著。土壤有机质是影响土壤中重金属Hg含量的主要因子,土壤颗粒粗细对土壤重金属含量也产生影响。

The physicochemical properties and heavy metal content of farmland soil in Fujian coastal area were investigated.The relationship between soil physicochemical properties and heavy metal content of soil was studied with correlation analysis.The results showed that the average pH of farmland soil in Fujian coastal area was 5.56.The content of soil organic matter was 30.20 g/kg on the genus level.Other soil nutrient content reached middle level.Significant correlation between Pb content in soil and soil total nitrogen content was found.The Hg content in soil and organic matter and cations exchange capacity in soil was not significantly correlated.Other physicochemical properties and heavy metal content was correlated.Soil organic matter was the main factor affecting the content of heavy metal Hg in soils.Soil particle size can affect the content of heavy metal in soil.