自然资源遥感2025，Vol.37Issue(2)：128-139,12.DOI:10.6046/zrzyyg.2023330
松嫩平原土壤盐碱化地表基质成因研究
Origin of surface substrate for soil salinization and alkalization in the Songnen Plain
摘要
Abstract
To determine the origin of surface substrate for soil salinization and alkalization in the Songnen Plain,this study investigated Songyuan City based on Sentinel-2 multispectral images.Considering various commonly used indices like the soil salinity index(SSI),soil water index(SWI),and vegetation index(VI),this study constructed the optimal 3D spectral feature model to calculate the soil salinization-alkalization index(SSAI)for inversion of the soil salinization-alkalization status.Surface water and groundwater in areas subjected to soil salinization and alkalization were sampled to test their salt ion concentrations,followed by the analysis of salt ion sources according to the groundwater levels.The surface substrate was explored through planar grid layout and vertical stratified sampling.A total of 2 362 soil samples were collected in various layers within a depth of 5 ru to test their pH and texture for the construction of a 3D surface substrate model.The results of this study reveal a positive linear correlation between the inversion result of remote sensing data and the topsoil salt content(coefficient of determination:R2=0.74).The study area was characterized by alkalization of sodium bicarbonate,with soil salt ions originating primarily from groundwater.The deep multilayer argillaceous soils acted as an aquiclude to prevent the downward infiltration,migration,and dilution of salt ions along with water.This surface substrate condition serves as the objective cause of soil salinization and alkalization in the study area.关键词
土壤盐碱化/三维光谱特征模型/Sentinel-2多光谱影像/地表基质Key words
soil salinization and alkalization/3D spectral feature model/Sentinel-2 multispectral image/surface substrate分类
信息技术与安全科学引用本文复制引用
马敏,左震,韩燕东,邱野,乔牡冬..松嫩平原土壤盐碱化地表基质成因研究[J].自然资源遥感,2025,37(2):128-139,12.基金项目
中国地质调查局项目"松嫩平原松原地区黑土地地表基质调查项目"(编号:ZD20220114)和自然资源综合调查指挥中心科技创新基金项目"盐碱化遥感反演与地表基质特征研究——以松嫩平原松原市为例"(编号:KC20230009)共同资助. （编号:ZD20220114）
