地下水埋深对土壤剖面盐分离子分异的影响  

Effect of Water Table on Soil Salt Ions Transfer and Variation

作　　者：郭全恩[1] 马忠明[1] 王益权[2] 南丽丽[3] 李秋玲[3] 

机构地区：[1]甘肃省农业科学院土壤肥料与节水农业研究所,兰州730070 [2]西北农林科技大学资环学院,陕西杨凌712100 [3]甘肃农业大学草业学院,兰州730070

出　　处：《灌溉排水学报》2010年第6期64-67,共4页Journal of Irrigation and Drainage

基　　金：甘肃省自然科学基金项目(0803KJZA040);甘肃省国际合作项目(090WCGA902)

摘　　要：采用室内土柱模拟试验研究了不同地下水埋深对土体盐分离子作用规律的影响。结果表明,在0～30 cm土层电导率随地下水埋深的变化呈现规律性变化,即:EC100 cm>EC120 cm>EC80 cm≥EC60 cm>EC40 cm。且不同地下水埋深对不同盐分离子作用的影响不同,土壤盐分、Ca2+、Mg2+、Na+和SO42-表聚的敏感地下水埋深是100 cm,而Cl-表聚的敏感地下水埋深是60 cm。在相同地下水埋深条件下,Ca2+、Na+和SO42-迁移规律与土壤盐分的迁移规律一致。A simulation experiment was adopted to study the effect of water table on soil salt ions transfer and variation in laboratory.The results showed that the variety of electrical conductivity was EC100 cm EC120 cmEC80 cm≥ EC60 cmEC40 cm in the soil layers of 0 to 30 cm.The effects of water table on several salt ions was the different,the sensitivity water table on salt,Ca^2＋,Na^＋ and SO4^2- accumulation was under the 100 cm of water table,but the sensitivity water table on Cl^-accumulation was under the 60 cm of underground water level.The variety rule of Ca^2＋,Na^＋ and SO4^2- transfering and accumulating was accord with soil salt under the same water table.

关 键 词：地下水埋深 盐分离子 迁移 分异 

分 类 号：S152.7[农业科学—土壤学]