松嫩平原不同微地貌上土壤剖面盐分组成及其分布特征  

Salt Composition and Distribution Characteristics in Soil Profiles on Different Micro Landforms in the Songnen Plain

作　　者：鄂宇迪 徐雅婧 冯君[1] E Yu-di;XU Ya-jing;FENG Jun(College of Resources and Environmental Sciences,Jilin Agricultural University,Changchun 130118,China)

机构地区：[1]吉林农业大学资源与环境学院,吉林长春130118

出　　处：《土壤通报》2021年第3期535-543,共9页Chinese Journal of Soil Science

基　　金：国家重点研发计划项目(2016YFC0501200);国家自然科学基金项目(41771250)资助。

摘　　要：利用野外调查和理化分析方法,选取松嫩平原盐碱化草原一个典型洼地不同微地貌单元5个土壤剖面,研究了该区域苏打盐渍土土壤剖面发生学形态特征,分析了可溶盐组成及其分布特点。结果表明:不同微地貌上土壤剖面发生层次的碱化度与可溶盐总量的分布趋势相近,显示出苏打盐碱土积盐和碱化呈同步的特征;可溶盐离子组成以K^(+)和Na^(+)及HCO_(3)^(-)和CO_(3)^(2-)为主;P1剖面0~60 cm和P3剖面0~40 cm盐分数量多且集中分布,盐分表聚作用显著;其它剖面盐分数量均呈现中部高且向下减少的趋势;洼地由西至东,盐碱土土壤类型依次为苏打浅位盐化碱土、苏打白盖盐化碱土、苏打轻盐弱碱化草甸土、苏打弱碱化盐土。微域内苏打盐碱土呈复区分布。Five soil profiles with different micro geomorphological units in a typical depression of Songnen Plain were selected by means of field investigation and physical and chemical analysis.The morphological characteristics of soil profile of soda saline soil in this area were studied,and the composition and distribution characteristics of soluble salt were analyzed.The results showed that the distribution trend of alkalinity and total soluble salt in soil profile was similar to that in different micro geomorphology,indicating that the salt accumulation and alkalization in soda salinealkali soil were synchronous;the soluble salt composition were mainly K^(+) and Na^(+),HCO_(3)^(-) and CO_(3)^(2-);the depth of P1 profile 0-60 cm and P3 profile 0-40 cm salt content were large and concentrated,and the salt surface accumulation was significant;the salt content of other profiles showed a trend of high in the middle and decreasing downward;and the soil types of saline-alkali soil from west to east were shallow sodic salinized alkaline soil-white crust sodic salinized alkaline soil-soda light salt weakly alkalized meadow soil-soda weakly alkalized saline soil.The formation of soda alkali soil in multi regions was complex.

关 键 词：微域 苏打盐碱土 土壤剖面 盐分组成 

分 类 号：S153[农业科学—土壤学]