灌溉排水学报2026，Vol.45Issue(5)：67-78,12.DOI:10.13522/j.cnki.ggps.2025274
不同灌排条件下盐渍土冻融期水热盐迁移速率研究
Combined effects of irrigation and drainage on water,heat and salt dynamics in saline soils during the freezing-thawing period
摘要
Abstract
[Objective]Saline-alkali soils are widely distributed in the Yinbei Irrigation District of Ningxia,and coordinated irrigation and drainage management is critical to preventing secondary salinization in this region.This paper investigates the combined effects of irrigation and drainage on soil water,heat,and salt dynamics during the freezing-thawing period,with the aim to find a practical strategy to improve efficient utilization of these soils.[Method]The experiment was conducted using soil columns packed with salinized soil to represent a winter irrigation.It consisted of three irrigation treatments:900 m3/hm2(W1),1 350 m3/hm2(W2),and 2 400 m3/hm2(W3),and two drainage treatments:with drainage(D1)and without drainage(D2).During the experiment,spatiotemporal variations in soil water,heat,and salt were measured in all treatments during a freezing-thawing period.[Result]Irrigation played the dominant role in influencing water and salt migration,as well as heat transfer throughout the soil profile in all treatments.In particular,W2 treatment resulted in the largest variation in water,heat,and salt in the 5 cm soil layer compared to that in the 15-70 cm soil layers.Water,heat,and salt migration were strongly correlated in the 15-25 cm soil layers in all treatments,with correlation coefficients ranging from 0.63 to 0.99.Drainage significantly enhanced the downward migration of soil water and salt.Overall,the temperature variation in the W2D1 treatment showed a hysteresis effect within the soil profile;water and salt migrated deeper in this treatment than in others,demonstrating a strong synergistic effect of irrigation and drainage on soil water and salt movement.[Conclusion]A winter irrigation amount of 1 350 m3/hm2 combined with a drainage can optimally regulate the migration of water,salt,and heat during the freezing-thawing period in saline soil profile.These findings provide practical guidance for efficient utilization of saline soil and mitigating secondary salinization in the Yinbei Irrigation District.关键词
银北灌区/灌排协同/盐渍土/冻融期/水热盐迁移Key words
Yinbei irrigation district/coordination of irrigation and drainage/saline soil/freezing-thawing period/water-heat-salt migration分类
农业科技引用本文复制引用
吕航,李旭,李王成,贾振江,吴洋洋,安文举,黄亚浩,马东祥..不同灌排条件下盐渍土冻融期水热盐迁移速率研究[J].灌溉排水学报,2026,45(5):67-78,12.基金项目
国家重点研发计划项目(2021YFD1900601) （2021YFD1900601）
宁夏高等学校一流学科建设项目(NXYLXK2021A03) （NXYLXK2021A03）
宁夏大学研究生创新项目(CXXM2024-30) （CXXM2024-30）
国家自然科学基金项目(52169010) （52169010）
宁夏自然科学基金重点项目(2021AAC02008) （2021AAC02008）
