分类： 农、林、牧、渔 >> 土壤学 提交时间： 2025-07-17 合作期刊: 《干旱区科学》
摘要： Intense evaporation in areas with loess-like sulfate saline soils has resulted in significant ecologicalchallenges that include water shortages and soil salinization. Investigating evaporation rate in loess-likesulfate saline soils under varying salt contents carries crucial implications for understanding regional waterloss processes, predicting soil salinization advancement, and formulating effective ecological managementstrategies. Therefore, this study sampled the loess-like sulfate saline soil that is widely distributed in westernChina as experimental materials and investigated the impact of different initial salt contents (0.00%, 0.50%,1.50%, 3.00%, and 5.00%) on the evaporation rate, water content, and temperature of soil. The resultsshowed that the evaporation rate decreased with increasing initial salt content. After a salt accumulationlayer formed on the soil surface, the water content of the surface soil fluctuated. An increase in the initialsalt content resulted in a corresponding increase in the surface temperature. Considering the evaporationcharacteristics of loess-like sulfate saline soil and the impact of an anomalous increase in surface soil watercontent on soil surface resistance, this study proposed a modified evaporation model on the basis ofFujimaki’s evaporation model of saline soil by introducing a correction coefficient β to modify the soilsurface resistance. A comparison of the calculated evaporation rates before and after the modification withthe measured evaporation rates revealed a significant improvement in the calculation accuracy of themodified model, indicating that the modified model is capable of more accurately simulating the evaporationrate of sulfate saline soil with different initial salt contents. This paper proposes an effective method forcalculating the evaporation rate of loess-like sulfate saline soils, providing a theoretical basis for evaporationresearch in saline soil.
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