Using hyperspectral vegetation indices as a proxy to monitor soil salinity

Publication year: 2011
Source: Ecological Indicators, Volume 11, Issue 6, November 2011, Pages 1552-1562

Ting-Ting, Zhang , Sheng-Lan, Zeng , Yu, Gao , Zu-Tao, Ouyang , Bo, Li , …

The spectral bands most sensitive to salt-stress across diverse plants have not yet been defined; therefore, the predictive ability of previous vegetation indices (VIs) may not be satisfied for salinization monitoring. The hyperspectra of seven typical salt-sensitive/halophyte species and their root-zone soil samples were collected to investigate the relationship between vegetation spectra and soil salinity in the Yellow River Delta (YRD) of China. Several VIs were derived from the recorded hyperspectra and their predictive power for salinity was examined. Next, a univariate linear correlogram as well as multivariate partial least square (PLS) regression was employed to investigate the sensitive bands….