Effect of Micro-topography and Groundwater Depth on Soil Potential Salinization in Heilonggang Basin

ZHANG Huayan; NIU Ling; HAO Jinmin; BAO Luer; ZHANG Yanhong; XING Xiaoxia

doi:10.13961/j.cnki.stbctb.2018.05.014

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Effect of Micro-topography and Groundwater Depth on Soil Potential Salinization in Heilonggang Basin

- Effect of Micro-topography and Groundwater Depth on Soil Potential Salinization in Heilonggang Basin
- Bulletin of Soiland Water Conservation Vol. 38, Issue 5, Pages: 83-90(2018)
- 作者机构：
  
  1. 中国农业大学资源与环境学院,北京,100193
  2. 中国农业大学曲周试验站, 河北曲周,057250
  3. 邯郸市水资源综合管理办公室,河北,邯郸,056001
  4. 邯郸市复兴区户村镇,河北,邯郸,056001
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.05.014
  CLC： S156.4
- Published：2018
- 稿件说明：
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ZHANG Huayan, NIU Ling, HAO Jinmin, et al. Effect of Micro-topography and Groundwater Depth on Soil Potential Salinization in Heilonggang Basin[J]. Bulletin of Soiland Water Conservation, 2018, 38(5): 83-90.
DOI：

ZHANG Huayan, NIU Ling, HAO Jinmin, et al. Effect of Micro-topography and Groundwater Depth on Soil Potential Salinization in Heilonggang Basin[J]. Bulletin of Soiland Water Conservation, 2018, 38(5): 83-90. DOI： 10.13961/j.cnki.stbctb.2018.05.014.

摘要

[目的

]

对近年河北省曲周县土壤潜在盐渍化进行多方位评价，为预防土壤盐渍化提供科学依据。[方法

]

通过微咸水灌溉试验、土壤剖面观测和土样分析，从海拔高度、土层深度、地下水埋深、土壤质地几个方面对黑龙港流域土壤盐分运移以及其对土壤潜在盐渍化的影响进行探讨。[结果

]

从区域角度分析，降雨和用微咸水灌溉加剧了表层盐分向下层淋洗的可能性，从而使土壤盐分多在40—100 cm土层聚集。质地较为黏重的土层阻止了土壤盐分的运移而聚积在该土层之上，为土壤潜在盐渍化创造了条件。土壤盐分含量与海拔高度呈现出很好的相关性，其复相关指数R

=0.76。HCO

的表聚现象比较明显，各土层土壤SO

离子和Ca

离子与全盐含量之间达到了显著和极显著相关（0.88

～1.00

，0.89

～0.97

），Ca

离子与SO

离子之间达到了显著和极显著相关（0.86

～0.97

）。[结论

]

微地貌和土体构型的变化将会影响到土壤盐分的重新分配，进而对土壤潜在盐渍化有重要影响。

Abstract

[Objective] To investigate the potential salinization of soil in Quzhou County

Hebei Province in recent years

in order to provide scientific basis for preventing soil salinization.[Methods] The brackish water irrigation experiment

soil profile observation and soil sample analysis was conducted to study the soil salinity transport and its potential salinization to the soil in Heilonggang basin from the aspects of altitude

soil depth

groundwater depth and soil texture.[Results] Rainfall and brackish water increased the possibility of surface salt leaching to the lower layer

which leads to the accumulation of soil salinity in 40-100 cm soil layer. Soil with more sticky texture appeared at 56 cm depth

which prevented the movement of soil salt and accumulated on it

thus creating potential conditions for soil salinization. Micro-topography affected the redistribution of salinity

and soil salinity content and altitude showed a good correlation (R2=0.76). The change of texture types in the soil layers at different depths affected the redistribution of soil salinity. The phenomenon of surface aggregation of HCO3- was obvious. The contents of SO42- and Ca2+ in all soils were significantly correlated with total salt content (0.88*~1.00**

0.89*~0.97**)

and there was a significant relationship between the contents of SO42- and Ca2+ (0.86*~0.97**).[Conclusion] The change of micro-geomorphology and soil profile pattern will affect the redistribution of soil salinity

and have an important impact on the potential salinization of soil.

关键词

Keywords

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