【摘要】 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。更多还原

【Abstract】 Taking the oasis of the lower reaches of Kaidu River Basin,soil salinization characteristics were investigated,and the relations between the level of soil salinization and soil spectrum were analyzed.The multi squares regression model was established based on the statistical analysis of the soil salinization factors and the reflectance of hyperspectra.The results showed that Lands in the area were mostly of weak alkali soil with pH value greater than 8.0,and of soil salt content appeared as T distribution.The different soil salinization levels of spectral curves characteristics were similar in shape,and the change of the curves was gentle.Spectral reflectance curve shape of the soil basically consisted of five fold lines(0.35-0.71 μm,0.71-1.47 μm,1.47-1.97 μm,1.97-2.21 μm and 2.21-2.50 μm) and four absorbing belts(0.69-0.74 μm,1.38-1.53 μm,1.81-2.09 μm and 2.09-2.25 μm) in visible and near-infrared wavelength.更多还原