庐江矾矿区土壤理化特性研究

Study on Physical and Chemical Properties of Soil in Alumite Mine Area in Lujiang

为深入了解矿区废弃地土壤理化特性,探究其复垦困难的关键因素,以庐江矾矿为研究对象,对土壤理化性质进行测定。结果显示:矿区土壤为砂质壤土;含水量为12.09%,干旱等级为轻旱;土壤容重为1.39 g·cm^(-3);p H为4.20;有机质含量为0.59%,全氮为0.037%,有效磷和速效钾分别为7.66 mg·kg^(-1),55.06 mg·kg^(-1)。这表明矿区砂化明显,具有轻度干旱现象,土壤呈酸性、结构性差,有机质、全氮缺失严重,氮磷钾比例失调,养分极低。土壤理化性质之间相关性分析表明:土壤含水量与容重存在极显著的负相关性,有机质与p H、有效磷均存在显著的正相关性,与全氮存在极显著相关关系;有效磷与全氮也存在显著正相关性。

In order to understand the physicochemical properties of soil in mining waste land and explore the key factors of its reclamation difficulties, the physicochemical properties of the soil samples are researched,which are collected from alumite mine area in Lujiang. The results show that the soil in the mining area is sandy loam, the water content is 12.09% and the drought level is mild, the volume weight of soil is 1.39 g · cm-3,the p H value is 4.20, the organic matter content is 0.59%, the total nitrogen is 0.037%, the available phosphorus is 7.66 mg·kg-1, and the available potassium is 55.06 mg·kg-1.The phenomenon of soil is obvious, and mild drought appears at the same time. Soil is acidic and has bad structure. It lacks of organic matter and total nitrogen and the proportion of NPK in soil is disregulated, and the nutrient of soil is very low. The correlation about physical and chemical properties of soil is analyzed and we get that the soil moisture are negatively correlated with soil bulk density. Organic matter is evidently correlated to total nitrogen and negatively correlated with p H and available phosphate.Total nitrogen are very significant positive correlations with the content of available phosphorus.