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从小尺度探讨苏打盐渍土的特征以及演变规律
Alternative TitleProperties and Evolvement of Secondary Sodic Saline Soil in Micro Scale
罗金明; 邓伟; 张晓平; 杨帆; 李秀军
Corresponding Author罗金明
2009
Source Publication干旱区资源与环境
Volume23Issue:2Pages:137-143
Other Abstract在吉林省大安地区选取3个30m长的截面,探讨了松嫩平原西部苏打盐渍土发展规律。结果表明:松嫩平原西部的植被对土壤盐渍化发生和演化具有举足轻重的作用。植被一旦被破坏,在相距3-5m的微域尺度内地势相对高差很小(相对高差为2-18cm),土壤剖面间的性质与结构却存在明显的差异,甚至局部地下水的化学特征也发生巨大的变化。植被破坏后,土壤表层的粘粒逐渐向下迁移和淀积,致使土壤结构恶化,同时盐分表聚使土壤由盐分含量较低、碱化程度较弱的盐化草甸土迅速向碱化度较重的浅位柱状碱土和白盖苏打碱土转化,最后发展成为成片的白盖苏打碱土,最终使整个区域的盐渍化程度不断加重。人类不合理利用是近年来松嫩平原盐渍化迅速发展的重要原因;保护已有的植被和恢复被人类破坏的植被对遏制盐渍化的发展具有十分重要的意义。; Three 30- m- long transects were selected in Da a'n County of Jilin Prov ince to discuss the evolvement of
sod ic alka line soil in west o fSongnen Plain. Results show ed that vegetat ion in Songnen Plain played a critical importance in soil salinization occurrence and evolvemen.t Once the vegetation was destroyed, the soil physical
structure and chem ica l propert ies and the chem ical properties of shallow groundw ater w ou ld have an obv ious
change, even though w ithin 3~ 5m distance w hich the relat ive altitude w as pretty low ( 2- 18cm ) . When the
grassw as destroyed, c lay in surface layerw ou ld transport downw ard and deposit in sub - layer, w hich resu lted
into the deterio ration of so il physical structure. At the same time, a large amount of salinity accumulated in surface layer, which would result to the soil evolveing from the salinem eadow soilwith low salinity content and weak
ESP towards the shallow columnar alkaline soilorwh itecrustsodic alkaline soilwith comparative high of ESP,
and finally evolve into large area ofwh ite sodic alkaline soil in the end. This may cause the salin ization degree to aggravate gradually in whole region. The irrationa l development was an important reason for the rapid saline soil
evolvement in recent years. Protection of existed vegetation in present day and reconstructing the destroyed vegetation would be important significance for limitation of development of soil salinization in this region
Keyword次生盐渍化 微域景观 苏打盐渍土
Language中文
Funding Organization中科院知识创新重大项目(KZCX1-SW-19-02)
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/6815
Collection成都山地所知识仓储(2009年以前)
山区发展研究中心
Corresponding Author罗金明
Recommended Citation
GB/T 7714
罗金明,邓伟,张晓平,等. 从小尺度探讨苏打盐渍土的特征以及演变规律[J]. 干旱区资源与环境,2009,23(2):137-143.
APA 罗金明,邓伟,张晓平,杨帆,&李秀军.(2009).从小尺度探讨苏打盐渍土的特征以及演变规律.干旱区资源与环境,23(2),137-143.
MLA 罗金明,et al."从小尺度探讨苏打盐渍土的特征以及演变规律".干旱区资源与环境 23.2(2009):137-143.
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