章丘地区土壤硒的含量分布及影响因素

Distribution and Content of Selenium in Soil and Its Influence Factors in Zhangqiu Area

摘要:

以章丘地区土壤为对象，系统分析了表层、深层土壤及8条剖面土壤中Se元素的含量水平，研究了土壤中Se的分布特征及其与土壤类型、成土母质、地形地貌和土壤理化性质及组分的关系。结果表明：章丘地区表层土壤中Se含量在0.1～0.8mg/kg之间，以中硒土壤为主，富硒土壤面积173km2。土壤类型中，水稻土Se平均含量水平最高，为0.55mg/kg；成土母质中以石炭—二叠纪泥页岩发育的土壤Se含量最高；剖面土壤中的Se主要在表层富集。影响章丘地区土壤Se含量分布的主要因素是成土母质、地形地貌、土壤pH、有机质及土壤中硫、铁铝氧化物等组分。

Abstract:

Setting soil in Zhangqiu area as an example, the contents of Se in surface soil, deep soil and section 8 porfiles have been analyzed comprehensively, distribution characteristics, and the relation between distribution and soil types, soil parent materials, topography, geophysical and geochemical property and components have been studied as well. It is showed that the content of Se in surface soil is 0.1~0.8mg/kg. It is mainly composed of seleniummedium soil, while the square of seleniumrich is 173km2. Among soil types, the average content of Se in paddy soil is the highest as 0.55mg/kg; while among soil parent materials, the content of Se in CarboniferousPermian soil is the highest. Se is concentrated in the surface in profile soil. The main factors affected the distribution of Se content in Zhangqiu area are soil parent material, topography, soil pH, organic matter, sulfur, iron and aluminum oxides and other components.