地下水作用条件下土壤积盐规律研究  

SALT DYNAMICS IN SOIL UNDER CONDITIONS OF DIFFERENT GROUNDWATER TABLES AND SALINITIES

作　　者：刘广明[1] 杨劲松[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008

出　　处：《土壤学报》2003年第1期65-69,共5页Acta Pedologica Sinica

基　　金：中国科学院知识创新项目 (ISSASIP0 1 0 7);中国三峡工程开发公司项目 (SX(97) -1 1 -4);国家重点基础研究发展规划项目 (G1 9990 1 1 80 3 )的部分内容

摘　　要：用粉砂壤土土柱进行了为期一年的室内模拟试验 ,对不同地下水埋深及其矿化度作用条件下 0～ 40cm深度土壤的盐分运动规律进行了深入研究。地下水埋深 85cm、1 0 5cm情况下 ,0～ 40cm深度土壤电导率与地下水矿化度呈良好正相关关系。地下水埋深 1 5 5cm、试验设定条件下 ,各土柱 0～ 40cm深度土壤积盐强度都较小 ,并且相互之间差异不明显。获得了各土柱 0～ 40cm深度土壤电导率关于地下水埋深、地下水矿化度的统计模型。对土壤电导率动态规律进行了深入分析 ,并建立了地下水明显影响到该深度土壤后土壤电导率动态模型。Summary A one year indoor soil column simulation experiment was conducted to study salt dynamics in soil (0～ 40 cm layer) of silt loam with different groundwater conditions. The obtained results show that electric conductivity of the soil (EC 0) is in positive correlation to groundwater salinity under the condition of groundwater table ranging from 85 cm to 105 cm. When the groundwater table is at 155 cm, salt accumulation of the soil columns in 0～40 cm layer is much less intensive and varies slightly in intensity regardless of the difference in groundwater salinity. In order to evaluate the effect of groundwater table and salinity on EC 0, a statistical model was built. Deeper analysis of the law of the dynamics of soil electric conductivity has eventually led to the set up of models about EC 0 dynamics (after mineral groundwater influenced EC 0 evidently).

关 键 词：地下水作用 土壤积盐规律 地下水埋深 地下水矿化度 盐分动态 

分 类 号：S156.41[农业科学—土壤学] S153.4[农业科学—农业基础科学]