Analysis on the Characteristics of the Oasis Soil Salinization and Soil Spectrum in the Lower Reaches of Kaidu River Basin,Xinjiang

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.