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以稀土尾矿库周边湿地土壤作为研究对象,无污染的黄河湿地作为对照样地,在不同深度上研究了总磷、水解氮、速效钾和有机质等土壤养分含量的垂直分布特征。结果显示:整体上0~20 cm土层土壤养分含量高于底层,水解氮随着土壤深度的增加显著降低(P<0.05),土壤养分等级为有机质>全磷>水解氮>速效钾。整个研究区域的土壤肥力普遍较低,土壤养分表现为有机质最优,全磷和水解氮次之,速效钾最差,耕作层土壤养分高于底层。研究明确了稀土尾矿库周边湿地土壤的垂直分布状况,对当地土壤生态环境保护提供参考。
Taking the wetland soil around the tailing pond as the research object and the non-polluted Yellow River wetland as the control plots, the vertical distribution characteristics of soil nutrients such as total phosphorus, hydrolyzed nitrogen, available potassium and organic matter were studied at different depths. The results showed that the soil nutrient contents of 0-20 cm soil layer were higher than those of the bottom layer, while the hydrolyzed nitrogen decreased significantly with the soil depth increasing (P <0.05). The soil nutrient contents were organic matter> total phosphorus> hydrolyzed nitrogen> available potassium. Soil fertility was generally low in the entire study area. Soil nutrients showed the best organic matter, followed by total phosphorus and hydrolyzed nitrogen, followed by potassium with the worst available potassium, and soil nutrients at the tillage layer were higher than the bottom. The study clarified the vertical distribution of the wetland soil around the rare earth tailings pond and provided references for the local soil ecological environment protection.