鲁中碳酸盐岩区土壤硒来源、有效性及影响因素
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X142

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山东省地质矿产勘查开发局地质勘查引领示范和科技创新项目(KC201903、 202005、 KC202207)资助。


Sources, Availability and Influencing Factors of Soil Selenium in Carbonate Rock Area of Central Shandong
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    摘要:

    碳酸盐岩在山东省青州市西南部大面积发育,是土壤母质的重要物源,以该地区土壤作为中心环节,分析了岩石、大气、土壤中的硒及土壤性质,研究了土壤硒的来源、有效性及影响因素。结果表明,土壤全硒含量均值为0.28 mg/kg,以足硒土壤为主,土壤有效硒含量均值为15.03 μg/kg,有效度均值为5.70%,有效硒含量与全硒含量呈显著正相关。岩石硒含量均值为0.035 5 mg/kg,与对应的土壤硒含量呈显著正相关。土壤全硒、有效硒含量与土壤pH均呈显著负相关,与有机质含量均呈显著正相关;有效硒含量与土壤黏粒含量呈显著负相关。大气降尘的硒含量均值为1.77 mg/kg,年沉降通量为0.28 mg/m2,表层土壤硒的年增量为0.000 9 mg/kg,年增长速率为0.33%。鲁中碳酸盐岩区土壤硒含量水平主要受控于母岩,同时大气降尘对土壤硒也有所贡献,土壤理化性质对硒及其有效性影响显著。

    Abstract:

    Carbonate rocks are widely distributed in the southwest of Qingzhou City, Shandong Province, which are an important source of soil parent material. Taking the soil in this area as the study target, selenium (Se) in rock, atmosphere and soil as well as soil properties were analyzed. The source, availability and influencing factors of soil Se were studied. The results showed that the mean content of soil total Se was 0.28 mg/kg, and most soils were sufficient in Se. The mean content of soil available Se was 15.03 μg/kg. The mean effective degree of Se was 5.70%. Available Se was significant positively correlated with the total Se. The mean content of rock Se was 0.035 5 mg/kg, which was significant positively correlated with the corresponding soil Se. The contents of soil total and available Se were significant negatively correlated with soil pH, and significant positively correlated with organic matter. Soil available Se was significant negatively correlated with clay content. The mean content of Se in atmospheric dustfall was 1.77 mg/kg, the annual settlement flux was 0.28 mg/m2, the annual increment of Se in the surface soil was 0.000 9 mg/kg with an annual growth rate of 0.33%. The content of soil Se in the carbonate rock area of central Shandong is mainly controlled by the parent rock, followed by atmospheric dust. Soil physicochemical properties also have significant impacts on Se and its availability.

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姜冰,王松涛,孙增兵,张海瑞,刘阳.鲁中碳酸盐岩区土壤硒来源、有效性及影响因素[J].土壤,2022,54(4):841-846. JIANG Bing, WANG Songtao, SUN Zengbing, ZHANG Hairui, LIU Yang. Sources, Availability and Influencing Factors of Soil Selenium in Carbonate Rock Area of Central Shandong[J]. Soils,2022,54(4):841-846

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  • 收稿日期:2022-01-14
  • 最后修改日期:2022-02-12
  • 录用日期:2022-02-15
  • 在线发布日期: 2022-08-26
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