节水灌溉Issue(5)：1-7,16,8.DOI:10.12396/jsgg.2025411
冻融期地下水浅埋条件下不同质地土壤中水、热、盐迁移规律研究
Study on Migration Patterns of Water,Heat and Salt in Variably Textured Soils Under a Shallow Groundwater Table During the Freeze-thaw Period
摘要
Abstract
Freeze-thaw processes are a key factor controlling spring surface soil salinization in areas with shallow groundwater,but the migration patterns of water,heat,and salt in soils of different textures during the freeze-thaw period remain unclear.To characterize these patterns under shallow-groundwater conditions,three lysimeters filled with sandy loam,loamy sand,and sand were established with a groundwater table depth of 1.0 m,and changes in water,heat,and salt in the 0～60 cm soil layer were monitored during the 2024-2025 freeze-thaw period.The results showed that the surface temperatures of the loamy sand and sand decreased more rapidly with falling air temperature than that of the sandy loam,whereas the sandy loam had the greatest freezing depth,reaching 44.54 cm.For all three soil textures,the 0～60 cm soil water storage first increased and then decreased,and the duration of the increase shortened as soil particle size increased.Only the sand exhibited an increase in water content by the end of the freeze-thaw period.The water-accumulation zone was located at 10～30 cm in the sandy loam and loamy sand,and at 10～20 cm in the sand.Sandy loam,loamy sand,and sand all showed a pattern of initial desalinization followed by salt accumulation,with salt-enriched layers at 0～5,0～10 and 0～20 cm,respectively.Coarser-textured soils developed thicker salt-enriched layers,whereas finer-textured soils exhibited higher salt concentrations within the accumulation zone.For all three textures,salt storage in the 0～60 cm layer increased overall during the freeze-thaw period and was negatively correlated with water loss,and surface salinization intensified with increasing particle size.The temporal coefficients of variation of salt storage were higher than those of water storage,indicating that salt storage in the 0～60 cm profile was more strongly affected by freeze-thaw processes than water storage.Among the three soils,loamy sand showed the largest temporal variations in both water and salt storage,suggesting the strongest sensitivity to freeze-thaw action.关键词
冻土区/土壤质地/土壤水分/土壤温度/土壤盐分/地下水埋深Key words
frozen soil region/soil texture/soil moisture/soil temperature/soil salinity/groundwater table depth分类
农业科技引用本文复制引用
孟强,陈军锋,崔莉红,薛静,杜琦,杨晓俊..冻融期地下水浅埋条件下不同质地土壤中水、热、盐迁移规律研究[J].节水灌溉,2026,(5):1-7,16,8.基金项目
国家自然科学青年基金项目(41502243) （41502243）
山西省自然科学基金面上项目(202203021221048) （202203021221048）
山西省自然科学青年基金项目(202203021212195) （202203021212195）
山西省水利技术研究推广补助项目(2024GM14). （2024GM14）
