Impact of soil texture on salt precipitation and evaporation under different initial conditions

作者：Hongbo Yu, 赵传杰, Qiang Liu, Mingjian Zhu, Liandong Wang, Mingyue Zhao, Huaijin Yan · 发表于：Frontiers in Environmental Science · 年份：2026 · DOI：10.3389/fenvs.2026.1822928 · 研究领域：Soil and Unsaturated Flow、Soil Moisture and Remote Sensing、Biocrusts and Microbial Ecology

In Northwest China, arid areas suffered from both water shortages and severe soil salinization. To effectively reclaim saline-alkali land and prevent secondary soil salinization, it is essential to understand how water evaporates from soils. In existing experimental studies, there is relatively little research on the laws of soil salinization after irrigation with saltwater. This study aims to explore how irrigation of saltwater influence soil evaporation, focusing on initial water content, soil texture, grain size fraction and saltwater concentrations. Through indoor experiments, the effects of initial water content, salt solution concentration and grain size on the evaporation rate of soil were studied by a series of indoor soil evaporation tests. The results show that, for the specimen obtained by mixing salt solution with soil, the evaporation rate of loess decreases with increasing salt concentration, and there is no obvious constant evaporation rate stage of evaporation. For the capillary saturated soil sample, increasing the salt concentration also impedes the evaporation in loess and quartz sand, and an obvious three-stage evaporation curve is observed. The influence of salt concentration on quartz sand is more significant than on loess, and a ‘salt crust growth stage’ occurs. Soil evaporation rates decrease as grain size increases at specific salt solution concentrations. Furthermore, whether salt crust promotes or restrains soil evaporation dependents on both grain ...