华北农学报2012，Vol.27Issue(1)：210-214,5.
咸水冰融化与土壤入渗过程不同盐分离子迁移规律研究
Study on Migration of Different Salt Ions in Melting and Infiltration Processes of Saline Water Ice
摘要
Abstract
Simulation and field experiments were conducted to investigate the migration of different salt ions in melting and infiltration processes of saline water ice. The aim of these experiments is to reveal the mechanism of water quality changes in ice melting and the distribution of different ions in different soil depth. The results showed that the content of all salt ions decreased rapidly during ice melting process. However,different ions leached in different rate. The sequence of different ions leaching ratio from high to low was Cl ＞ Mg2+ ＞ K + ＞ Na+ ＞ SP42- ＞ Ca2+ ＞ HCO3 . The difference of ions leaching rate leaded to changes of ions composition in melted water, which reduced sodium adsorption ratio and increased water pH eventually. After irrigation with freezing saline water,all salt ions of soil(0 ~ 80 cm) were decreased except HCO3 , which increased by 6. 85%. The sequence of ions leaching ratio from high to low was Mg2+ ＞ Cl- ＞ Ca2+ ＞ Na+ ＞ K+ ＞ SO42- ＞ HCO3- . Although the leaching ratios of Cl" and Na+ were not the highest, their proportions reached 62. 01 % and 21. 96% in total leaching salt,respectively. Irrigation with freezing saline water changed the ion composition of soil and resulted in alkaline trend in the surface soil. Therefore,freezing irrigation with saline water should be assorted with some measures to prevent soil alkalization.关键词
咸水冰/融化/滨海盐碱地/离子迁移Key words
Saline water ice/ Melting/Coastal saline soil/Migration of salt ions分类
农业科技引用本文复制引用
潘洁,肖辉,王立艳,程文娟,陆文龙..咸水冰融化与土壤入渗过程不同盐分离子迁移规律研究[J].华北农学报,2012,27(1):210-214,5.基金项目
国家科技支撑计划项目(2009BADA3B04) （2009BADA3B04）
