Na_2SO<sub>4</sub>盐结皮对风沙土水分蒸发的影响

杨彩霞; 李诚志; 孔德印; 师欣宇

doi:10.13568/j.cnki.651094.651316.2022.07.25.0001

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Na_2SO₄盐结皮对风沙土水分蒸发的影响

更新时间：2026-01-23

- Na_2SO₄盐结皮对风沙土水分蒸发的影响
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 40, Issue 3, Pages: 358-366(2023)
- 作者机构：
  
  1. 新疆大学生态与环境学院
  2. 新疆大学教育部绿洲生态重点实验室
  3. 新疆精河温带荒漠生态系统教育部野外科学观测研究站
- 作者简介：
- 基金信息：
- DOI：10.13568/j.cnki.651094.651316.2022.07.25.0001
  CLC： S152.73
- Published：2023
- 稿件说明：
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[1]杨彩霞,李诚志,孔德印,等.Na_2SO_4盐结皮对风沙土水分蒸发的影响[J].新疆大学学报(自然科学版)(中英文),2023,40(03):358-366.
[1]杨彩霞,李诚志,孔德印,等.Na_2SO_4盐结皮对风沙土水分蒸发的影响[J].新疆大学学报(自然科学版)(中英文),2023,40(03):358-366. DOI： 10.13568/j.cnki.651094.651316.2022.07.25.0001.

DOI：10.13568/j.cnki.651094.651316.2022.07.25.0001.

摘要

干旱区盐结皮对土壤水分蒸发有着重要影响，但Na_2SO4盐结皮研究不足．利用风沙土进行盐水土柱蒸发试验，观测并分析了盐结皮的形态以及盐晶体的变化情况，结果表明：1)当Na_2SO4盐水土柱表面结皮形成后降低了风沙土水分的蒸发速率，从而使盐水土柱的土壤水分平均蒸发速率比纯水土柱降低了14.30%;2)土壤内部有盐结晶形成也会降低土壤水分蒸发，蒸发期间盐水土柱土壤水分蒸发速率比纯水土柱降低了19.34%;3)当盐结皮由无水Na_2SO4或Na_2SO4·10H_2O潮解为一层液膜时，会短暂促进土壤水分蒸发，盐水土柱的土壤水分蒸发速率比纯水土柱提高了48.44%;4)Na_2SO4表面结皮和内部结晶均会有效降低含盐风沙土水分的蒸发速率，延缓含盐土壤内部水分蒸发损失速率，而盐结皮的潮解则会加剧土壤水分的蒸发，不利于土壤的水分保持．

Abstract

Salt crust has an important impact on soil moisture evaporation in arid areas

but Na_2SO4 salt crust research is insufficient.In this paper

the evaporation test of saline soil column was carried out by using aeolian sandy soil.The morphology of salt crust and the change of salt crystals were observed and analyzed.The results show that:1) When the surface crust of Na_2SO4 saline soil column is formed

the evaporation rate of aeolian sandy soil water is reduced

so that the average evaporation rate of saline soil column is 14.30%lower than that of pure water soil column.2) The formation of salt crystals in soil also reduces soil moisture evaporation

and the soil moisture evaporation rate of salt-water soil column is 19.34%lower than that of pure water soil column during evaporation.3) When the salt crust is decomposed from anhydrous Na_2SO4 or Na_2SO4·10H_2O into a liquid film

it will temporarily promote soil moisture evaporation

and the soil moisture evaporation rate of salt water soil column is 48.44%higher than that of pure water soil column.4) Na_2SO4 surface crust and internal crystallization can effectively reduce the evaporation rate of water in saline aeolian sandy soil

delay the evaporation loss rate of water in saline soil

and the dissolution of salt crust will aggravate the evaporation of soil moisture

which is not conducive to soil moisture retention.

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references

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Na_2SO4盐结皮对风沙土水分蒸发的影响

DOI：10.13568/j.cnki.651094.651316.2022.07.25.0001

摘要

Abstract

关键词

Keywords

references

Na_2SO₄盐结皮对风沙土水分蒸发的影响