土壤初始含盐量对水分入渗特性的影响  

Effect of Initial Soil Salt Content on Infiltration of Soil Water

作　　者：任长江[1] 白丹[1] 周文[1,2] 田济扬[1] 程鹏[1,2] 梁伟[1,3] 

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]华北水利水电学院,河南郑州450011 [3]陕西师范大学,陕西西安710062

出　　处：《干旱区研究》2014年第2期222-225,共4页Arid Zone Research

基　　金：国家自然科学基金(51279156;50979089);高等学校博士学科点专项科研基金联合资助课题(20116118110010);陕西省农业科技攻关项目(2010K02-08)

摘　　要：研究土壤初始含盐量对入渗特性的影响,对盐碱地治理具有重要意义。在室内分别进行初始氯化钠含量为3.6、4.5、5.3、5.7 g·kg-1和9.0 g·kg-1的一维垂直土柱淋洗试验。根据试验数据,采用多元回归法,建立了湿润锋、累积入渗量与时间和土壤含盐量之间的量化关系,回归相关系数分别为0.992、0.922,回归模型拟合程度较好;根据累积入渗量得到了入渗率与时间和土壤含盐量之间的量化关系。实验和分析计算表明:土壤初始含盐量对入渗特性的影响大于时间对入渗特性的影响,相同时间土壤初始含盐量越高,入渗湿润锋、累积入渗量和入渗率值越小。It has a great significance to study the effect of initial soil salt content on the infiltration of soil water for improving saline-alkaline soil. A one-dimensional vertical leaching experiment was carried out under different initial soil sodium chloride contents （3.6, 4.5, 5.3, 5.7 g · kg-1 and 9.0 g · kg-1 ） in laboratory. According the ex- periment data, the quantitative relationships between the wetting front, cumulative infiltration and time and the soil salt content were developed using the multiple regression analysis. The regression correlation coefficients were 0.992 and 0. 922, and the fitting results of the regression model were good. According to the cumulative infiltra- tion, the quantitative relationships between the infiltration rate and time and soil salt content were obtained. The analyzed result showed that the effect of initial soil salt content on the infiltration of soil water was higher than that of time. The higher the initial soil salt content was, the lower the values of wetting front, cumulative infiltration and infiltration rate would be.

关 键 词：土壤含盐量 入渗量 多元回归分析 盐碱地治理 

分 类 号：S152.7[农业科学—土壤学]