水土保持学报2011，Vol.25Issue(4)：88-93,6.
咸水结冰灌溉对盐化潮土盐基离子剖面迁移规律的影响
Effects of Agricultural Irrigation by Melting Saline Water Ice on Soil Salt and Ion Movement Under Fluvo-Aquic Soils
摘要
Abstract
The control treatment（irrigation with fresh water,CK）,irrigation with saline water（SW）,irrigation with saline water ice（MI）,and irrigation with saline water ice and wheat straw mulch（MI＋SW） was conducted to study the mechanism of soil water,salt and ion movement using soil column modeling experiment based on the melting process.The results showed that compared to irrigation with fresh water,soil salinity was more under the saline water treatment with the salt aggregation in the surface.However,irrigation with saline water ice the salt content in 0-40 cm decreased significantly,with the value of 0.28 dS/m,while making wheat straw mulching the salt rejection rate improved,especially in the 0-10 cm depth,where the salinity was only 0.15 dS/m,and had no significant difference observed with fresh water treatment.Meanwhile,irrigation with saline water ice significantly affected the vertical distribution characteristic of ion concentration,such as Cl^-,SO4^2-,HCO3^-,Na^＋,Mg^2＋,K^＋ and Ca^2＋.Na^＋,SO4^2- and Cl^-significantly decreased in the surface layer,while influenced slightly for Mg2＋,K＋ and Ca^2＋.In conclusion,irrigation with saline water ice could improve the desalination in surface soil,keep ionic equilibrium,make the salinity value in root distribution layers remain low,which was useful to alleviate the salinity and ion hazards,while the effect was much more significant with straw mulch.关键词
土壤盐分/离子/咸水灌溉/咸水结冰灌溉/秸秆覆盖Key words
soil salt/ions/irrigation with saline water/irrigation with saline water ice/wheat straw mulch分类
农业科技引用本文复制引用
车升国,林治安,赵秉强,左余宝,夏雪..咸水结冰灌溉对盐化潮土盐基离子剖面迁移规律的影响[J].水土保持学报,2011,25(4):88-93,6.基金项目
公益性行业（农业）科研专项 （）
中央级公益性科研院所基本科研业务费专项 （）
