海河低平原不同地貌土壤盐分特征研究  

Study on Soil Salt Characteristics of Different Landforms in Low Haihe River Plain

作　　者：杨萍果[1] 杨苗[2] 毛任钊[3] 

机构地区：[1]山西师范大学生命科学学院,山西临汾041000 [2]山西农业大学文理学院,山西太谷030801 [3]中国科学院遗传发育生物学研究所农业资源研究中心,石家庄050021

出　　处：《土壤》2011年第2期285-288,共4页Soils

基　　金：山西省自然科学基金项目(2010011044-3);国家重点基础研究发展计划项目(2005CB121106)资助

摘　　要：以河流冲积扇、河流冲积扇与滨海平原过渡带、滨海平原3种主要地貌类型,分析了海河低平原区土壤盐分含量、盐基离子组成及电导率的变化规律。结果表明:河流冲积扇耕层虽明显脱盐,但由于底土含盐量高,仍存在土壤盐渍化的威胁,阴离子以Cl-和SO42-为主;相反,河流冲积扇与滨海平原过渡带、滨海平原表土含盐量较高,而底土含盐量较低,阴离子以Cl-为主;土壤盐分中阳离子含量以Na++K+为主,盐分组成主要的可溶性盐为NaCl,其次是Na2SO4和CaCl2。Soil salt contents,salt composition and electrical conductivity changes of three kinds of landforms in low Haihe River,i.e.,alluvial plain,transition between alluvial and coastal plain,coastal plain were studied.The results showed that in the alluvial plain the desalinization in surface layer was noticeable,but salt content in the subsoil layer was still high,predominant salt anion in the soil were Cl-and SO42-.In transition between alluvial and coastal plain as well as coastal plain,salt content of top soil was high,predominant salt anion in the soil was Cl-.Na＋ and K＋ were predominant salt cations in the soil,which indicated that the dominant soluble salt was NaCl,followed by Na2SO4 and CaCl2.

关 键 词：海河低平原 电导率 土壤盐分 离子组成 

分 类 号：S156.41[农业科学—土壤学]