The two-year experiment was conducted in pot and soil column with SC—12(salinity-sensitivity) and CCRI-44(salinity-tolerance)at Pailou experimental station of Nanjing Agricultural U-niversity. By setting 5 soil salinity levels and selecting cotton cultivars with different salt-tolerance, this study was aimed at establishing monitoring model on soil electrical conductivity(EC)through analyzing correlationship between soil electrical conductivity and hyperspectral indexes of cotton functional leaves of main s...