Effect of Soil Texture on Water and Salt Transport in Freeze—Thaw Soil in the Shallow Groundwater Area

Research on the variation in soil water, heat, and salt unsaturated zones during freeze–thaw process has great significance efficiently utilizing water resources preventing salinization. The field experiment was carried out with lysimeter as test equipment to analyze characteristics of process, profile content, main ion content three textured soils groundwater table depth 0.5 m. results showed that temperature gradient freezing were greater average particle size increased. increment at 0 30 cm sandy loam loamy sand decreased by 40.20~93.10% 28.14~65.52% compared soil, increased period. Ca2+, Na+, Cl−, SO42− 4.37~45.50% 22.60~70.42% end period, correlation between increase size. research can provide a theoretical basis for salinization prevention crop production shallow areas.