咸水结冰灌溉下盐碱地土壤水热盐动态迁移特征分析

李俊杰; 屈忠义; 杨威; 王丽萍; 张如鑫

doi:10.13870/j.cnki.stbcxb.2023.02.044

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咸水结冰灌溉下盐碱地土壤水热盐动态迁移特征分析

更新时间：2025-03-12

- 咸水结冰灌溉下盐碱地土壤水热盐动态迁移特征分析
- Analysis of Dynamic Migration Characteristics of Soil Water, Heat, and Salt in Saline-alkali Soils Under Saline Water Freezing Irrigation
- 水土保持学报 2023年37卷第2期页码：377-384
- 作者机构：
  
  内蒙古农业大学水利与土木建筑工程学院,呼和浩特,010018
- 作者简介：
  
  [ "李俊杰(1997—),男,硕士研究生,主要从事盐碱地改良与水资源高效利用研究。E-mail:762636913@qq.com" ]
- 基金信息：
  
  "十四五"国家重点研发项目(2021YFC3201205,2021YFC3201202)
- DOI：10.13870/j.cnki.stbcxb.2023.02.044
  中图分类号： S278
- 纸质出版：2023
- 稿件说明：
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李俊杰, 屈忠义, 杨威, 等. 咸水结冰灌溉下盐碱地土壤水热盐动态迁移特征分析[J]. 水土保持学报, 2023,37(2):377-384.

LI Junjie, QU Zhongyi, YANG Wei, et al. Analysis of Dynamic Migration Characteristics of Soil Water, Heat, and Salt in Saline-alkali Soils Under Saline Water Freezing Irrigation[J]. 2023, 37(2): 377-384.
李俊杰, 屈忠义, 杨威, 等. 咸水结冰灌溉下盐碱地土壤水热盐动态迁移特征分析[J]. 水土保持学报, 2023,37(2):377-384. DOI： 10.13870/j.cnki.stbcxb.2023.02.044.

LI Junjie, QU Zhongyi, YANG Wei, et al. Analysis of Dynamic Migration Characteristics of Soil Water, Heat, and Salt in Saline-alkali Soils Under Saline Water Freezing Irrigation[J]. 2023, 37(2): 377-384. DOI： 10.13870/j.cnki.stbcxb.2023.02.044.

摘要

为探究合理的咸水结冰灌溉水量及咸水结冰灌溉下冻融期土壤水热盐动态迁移规律

以重度盐碱地为研究对象

在内蒙古达拉特旗开展连续2年田间小区原位冻融试验

设置4组灌水梯度

灌水量分别为140 mm (S1)

180 mm (S2)

220 mm (S3)以及不进行灌溉对照(CK)

灌溉水矿化度为8~10 g/L。通过测定试验期内土壤含水率、土壤温度以及盐分分布

分析咸水结冰灌溉下盐碱地土壤水热盐动态迁移特征。结果表明:咸水结冰灌溉可显著提高春季消融后土壤含水率

减缓冻融期深层土壤温度变异程度

降低因土壤温度变化引起的返盐现象

灌溉水量越大

土壤含水率提升幅度越大、保温效果越显著。经过反复冻融循环

适宜的咸水结冰灌溉处理下土壤盐分降低

当灌溉水量＜180 mm时脱盐率与灌水量呈正相关

当灌水量＞180 mm时春季消融后土壤含盐量增加。2年试验期内相较于未进行灌溉的对照处理

咸水结冰灌溉处理下土壤含水率提高82%~93%;土壤消融指数提高28%~65%;土壤冻结指数降低24%~25%;灌水量＜180 mm时0—40 cm土层脱盐率最高可达59%。综合考虑

在不造成土壤积盐导致次生盐渍化的前提下

灌溉水量180 mm下土壤保温、保墒、脱盐效果最好

可为来年作物生长提供适宜的土壤环境。

Abstract

In order to explore the reasonable amount of brackish water icing irrigation water and the dynamic migration of soil hydrothermal salt during freezing-thawing period under saline freezing irrigation

taking the severe saline and alkali land as the research object

an in-situ freezing-thawing experiment was carried out in Dalat Banner

Inner Mongolia for two consecutive years

and four irrigation gradients was set

with irrigation amount of 140 mm (S1)

180 mm (S2)

220 mm (S3) and the control (CK) without irrigation

respectively

the salinity of irrigation water was 8~10 g/L.By measuring soil moisture content

soil temperature and salinity distribution during the experimental period

the dynamic migration characteristics of soil hydrothermal salt in saline and alkaline land under saline ice irrigation were analyzed.The results showed that brackish water icing irrigation could significantly increase the soil moisture content after spring ablation

slow down the deep soil temperature variation degree during the freeze-thaw period

reduced the salinity phenomenon caused by soil temperature change

and the larger the irrigation water volume

the greater the increase of soil moisture content and the more significant the thermal insulation effect.After repeated freeze-thaw cycles

soil salinity was reduced under suitable brackish water icing irrigation treatment

and the desalination rate was positively correlated with the irrigation amount when the irrigation water amount was less than 180 mm

and the soil salinity content increased after spring ablation when the irrigation amount was more than 180 mm.During the 2-year experimental period

compared with the control treatment without irrigation

the soil moisture content under the brackish water icing irrigation treatment was increased by 82%~93%;the soil ablation index was increased by 28%~65%;the soil freezing index was reduced by 24%~25%;the desalination rate of 0—40 cm soil layer when the irrigation amount was less than 180 mm could reach up to 59%.Considering the comprehensive consideration

under the premise of not causing soil salt accumulation leading to secondary salinization

soil insulation

moisture preservation and desalination effect under irrigation water of 180 mm is the best

which can provide a suitable soil environment for crop growth in the coming year.

关键词

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