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以新疆开都河流域下游绿洲为研究区,通过土壤样品化学分析及其光谱反射率的测量,分析了土壤盐渍化特征以及土壤反射光谱曲线与土壤盐渍程度之间的关系;基于统计分析的方法,建立了表征土壤盐渍化特征的因子与其高光谱数据的多元回归模型。研究结果表明:研究区土壤pH值的平均值大于8.0,属于弱碱性土壤;土壤盐分含量呈T型分布;盐渍化土壤的光谱反射率曲线特征在形态上相似,变化平缓;在可见光-近红外波段,盐渍化土壤的光谱反射率曲线形状基本上由五个折线段和四个吸收带组成。
Taking the oasis in the lower reaches of the Kaidu River basin in Xinjiang as the study area, the relationship between soil salinization characteristics and soil reflectance curve and the degree of soil salinization was analyzed by chemical analysis of soil samples and their spectral reflectance. Based on statistical analysis , A multiple regression model was established to characterize the factors of soil salinization and its hyperspectral data. The results show that: the average value of soil pH value in the study area is greater than 8.0, belonging to weakly alkaline soil; the soil salinity content is T-shaped distribution; the spectral reflectance curve of salinized soil is similar in morphology and changes gently; Near infrared, salinized soil spectral reflectance curve shape is basically composed of five broken line segments and four absorption bands.