从小尺度探讨苏打盐渍土的特征以及演变规律
文献类型：期刊论文
| 作者 | 邓伟
|
| 刊名 | 干旱区资源与环境
 |
| 出版日期 | 2009 |
| 卷号 | 23期号:2页码:137-143 |
| 关键词 | 次生盐渍化 微域景观 苏打盐渍土 |
| 其他题名 | Properties and Evolvement of Secondary Sodic Saline Soil in Micro Scale |
| 通讯作者 | 罗金明 |
| 合作状况 | 国内 |
| 中文摘要 | 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。 |
| 英文摘要 | 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 |
| 分类号 | S156.4 |
| 资助信息 | 中科院知识创新重大项目(KZCX1-SW-19-02) |
| 语种 | 中文 |
| 公开日期 | 2014-02-11 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/6815]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山区发展研究中心 |
| 推荐引用方式 GB/T 7714 | 邓伟. 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 | 邓伟.(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 | 邓伟."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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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