A laboratory experiment was conducted in soil columns to study the moisture and salt redistribution through soil profile after the application of saline ice melt-water (SIMW) and flue gas desulfurization gypsum (FGDG) in a saline-sodic soil. The study consisted of SIMW (3200 ml frozen saline groundwater) and four SIMW+FGDG treatments which were SIMW+25%GR (7.9 mg·cm-2, gypsum require (GR) in the surface of soil column), SIMW+50%GR (15.9 mg·cm-2), SIMW+70%GR (23.8 mg·cm-2), and SIMW+100%GR (31.8 mg·cm-2). The results showed that Na+ content, EC, SAR, and pH were reduced near the surface layers in all treatments, but the trend was reversed in deeper soil layers. Comparing the SIMW treatments, treatments containing FGDG showed higher desalting rate, leaching depth, and soil moisture at the end of the experiment. The SIMW+50%GR treatment resulted in the highest leaching rate of Na+ and lowest EC and SAR in 0-40 cm soil layer. With the increase of the applied FGDG, there was no significant difference in reclamation effect. Therefore, when the small amount of gypsum was added in conjunction with saline ice meltwater, better leached effect of sodium was achieved.
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