开都河流域下游绿洲土壤盐渍化特征及其光谱分析  

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

作　　者：李新国[1,2] 李和平[3] 任云霞[1,2] 李会志[1,2] 罗晓琴[1,2] 

机构地区：[1]新疆师范大学地理科学与旅游学院,新疆乌鲁木齐830054 [2]新疆干旱区湖泊环境与资源实验室,新疆乌鲁木齐830054 [3]中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011

出　　处：《土壤通报》2012年第1期166-170,共5页Chinese Journal of Soil Science

基　　金：国家自然科学基金项目(41061025);新疆维吾尔自治区高校科研计划青年教师科研基金项目(XJEDU2009S69)资助

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。Taking the oasis of the lower reaches of K aidu 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 - 2.09μm and 2.09 - 2.25 μm） in visible and near-infrared wavelength.

关 键 词：土壤盐渍化 土壤盐分 光谱特征 绿洲 开都河流域下游 

分 类 号：S156.4[农业科学—土壤学]