邵阳市城区不同功能区土壤理化性质特征研究

Study on soil physical and chemical properties in different functional areas of Shaoyang City

为揭示邵阳市城区表层土壤理化性质的空间分布特征,选取休闲区、居住区、道路交通沿线和工业区等4个功能区的表层土壤,对含水率、有机质质量分数、全氮质量分数、速效磷质量分数和pH等理化指标进行测定分析。结果表明,土壤含水率处于3.33%~5.34%之间,平均值为4,22%。土壤有机质质量分数变化范围为1.06~46.02 g/kg,平均值为15.18 g/kg。土壤全氮质量分数变化范围0.42~4.62 g/kg,平均值为1.37 g/kg。土壤速效磷变化范围2.80~11.20 mg/kg,平均值为5.80 mg/kg。pH变化范围为4.9~6.9,土壤总体偏酸性。各理化参数的相关性不强,表明邵阳市城区土壤已经受到严重的人为扰动,表层的原始土壤已不复存在。研究结论可以为邵阳市城区土壤污染防治和土地利用规划提供理论依据。

In order to reveal the physical and chemical properties of surface soil,the four functional(including recreational,residential,along the road,industrial)areas in Shaoyang City were selected to analyze the physical and chemical indexes such as water content,organic matter,total nitrogen content,available phosphorus and pH.The results showed that the soil moisture content ranged from 3.33%to 5.34%with an average of 4.22%.The soil organic matter content ranged from 1.06 to 46.02 g/kg,with an average value of 15.18 g/kg.Soil total nitrogen content ranged from 0.42 to 4.62 g/kg with an average of 1.37 g/kg.Soil available phosphorus content ranged from 2.80 to 11.20 mg/kg,with an average of 5.80 mg/kg.The range of pH ranged from 4.9 to 6.9,and the soil was generally acidic.The correlation correlation between physical and chemical parameters was very weak.These results indicate that the soil in Shaoyang city is seriously disturbed by human activities and the original surface soil is ceased to exist.The conclusions can provide theoretical basis for soil pollution control and land use planning in Shaoyang city.