黄河三角洲土壤盐渍化与地下水特征关系研究

发布时间：2018-03-21 08:31

本文选题：黄河三角洲　切入点：土壤盐渍化　出处：《土壤学报》2017年06期 　论文类型：期刊论文

【摘要】：为研究黄河三角洲表层土壤盐分含量与地下水特征的关系,对研究区内土壤盐分含量及地下水进行原位监测,分析土壤盐渍化和地下水特征,并运用灰色关联分析法对地下水埋深、电导率、p H和主要离子含量的关系进行定量分析。结果表明:土壤表层盐分含量均值为3.90~6.31 g kg-1,表层以下土壤盐分含量均值为2.54~3.44 g kg-1,属于中度及以上盐渍化程度;地下水埋深平均值为1.16~1.71 m,普遍较浅;地下水阴离子以Cl-为主,阳离子以Na+为主,两者分别占阴、阳离子总量的比例约为65%。关联分析表明,不同地下水特征指标与土壤表层盐分含量的密切程度不同,同一特征指标与土壤表层盐分含量的密切程度在不同时期间差异显著,总体而言,土壤表层积盐与地下水电导率、Na+、Cl-的关系较为密切,与p H、CO32-和HCO3-之间的关系较弱。在防治土壤盐渍化中,应当加强对地下水电导率、Na+、Cl-的控制与管理。
[Abstract]:In order to study the relationship between surface soil salt content and groundwater characteristics in the Yellow River Delta, the soil salt content and groundwater in the study area were monitored in situ, and soil salinization and groundwater characteristics were analyzed. And the grey relational analysis method is applied to the buried depth of groundwater. The results showed that the average salt content in the surface soil was 3.90 ~ 6.31 g 路kg ~ (-1), and the average value was 2.54 ~ 3.44 g 路kg ~ (-1) in the soil below the surface layer, which was moderate or above salinization degree. The average buried depth of groundwater is 1.16 ~ 1.71 m, which is generally shallow, and the anions of groundwater are mainly Cl-, and the cations are mainly Na, accounting for anion and total cations, respectively, and the proportion of total cations is about 65. The correlation analysis shows that, The degree of closeness between different groundwater characteristic indexes and soil surface salt content is different, and the closeness between the same characteristic index and soil surface salt content is significant in different periods. The relationship between soil surface salt accumulation and groundwater conductivity Na + Cl- is relatively close, but it is weak with pH CO32- and HCO3-. In the process of soil salinization prevention and control, the control and management of groundwater conductivity Na + Cl- should be strengthened.
【作者单位】：江西省农业科学院土壤肥料与资源环境研究所;土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所);南京林业大学林学院;
【基金】：国家重点研发计划项目(2016YFD0200303,2016YFC0501309) 中国科学院科技服务网络计划(STS计划)项目(KFJSW-STS-141-2) 江苏省农业科技自主创新资金项目(CX(15)1005)资助~~
【分类号】：S156.4

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