Analysis on the Difference of Soil Salinization Characteristics in Hetao Saline-alkali Soil with Different Land Use

JING Yupeng; LIAN Haifei; LI Yuejin; LI Xiuping; GAO Wa; DI Caixia; LI Yanfang; KANG Wenqin

doi:10.13870/j.cnki.stbcxb.2020.04.051

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Analysis on the Difference of Soil Salinization Characteristics in Hetao Saline-alkali Soil with Different Land Use

更新时间：2025-03-12

- Analysis on the Difference of Soil Salinization Characteristics in Hetao Saline-alkali Soil with Different Land Use
- Vol. 34, Issue 4, Pages: 354-363(2020)
- 作者机构：
  
  1. 内蒙古农业大学草原与资源环境学院,呼和浩特,010011
  2. 内蒙古自治区农牧业科学院,呼和浩特,010031
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2020.04.051
  CLC：
- Published：2020
- 稿件说明：
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JING Yupeng, LIAN Haifei, LI Yuejin, et al. Analysis on the Difference of Soil Salinization Characteristics in Hetao Saline-alkali Soil with Different Land Use[J]. 2020, 34(4): 354-363.
DOI：

JING Yupeng, LIAN Haifei, LI Yuejin, et al. Analysis on the Difference of Soil Salinization Characteristics in Hetao Saline-alkali Soil with Different Land Use[J]. 2020, 34(4): 354-363. DOI： 10.13870/j.cnki.stbcxb.2020.04.051.

摘要

为研究河套平原盐碱地在不同利用方式对土壤盐碱化特征分布的影响，通过野外调查取样和室内分析相结合的方法，对5种土地利用方式下（林地、农用地、牧草地、改良地、盐荒地）不同深度土壤剖面形态特征、可溶盐含量、盐分离子组成、总碱度、pH、碱化度等指标的变化规律进行了系统研究。结果表明：不同利用方式土壤剖面土体结构、颜色、根系分布、石灰性反应及碱化层分布均有明显差异；土壤剖面的可溶性盐、阴阳离子分布因土地利用方式不同而存在差异，牧草地和林地土壤剖面可溶性盐呈"橄榄"型、盐荒地和改良地呈"表聚"型、农用地呈"底聚"型；土壤pH、碱化度和总碱度在剖面中的分布特征基本一致，呈"S"型；经不同利用方式土壤的盐化程度和碱化程度均有所下降，与盐荒地相比，农用地盐碱化指标下降的最为显著（P<0.05），其中0—20 cm土壤全盐量降至0.88 g/kg，pH降至7.83，总碱度、ESP降至0.17 cmol/kg和12.54%，表明苏打盐碱地经农用后更有利于土壤脱盐化过程和脱碱化过程；土壤全盐量、Ca2+、Mg2+、SO42-、总碱度、pH可作为控制区域盐碱化的主要因子。研究结果为阐明河套平原盐碱地的盐碱化过程及盐碱化土壤利用模式提供技术参考。

Abstract

In order to study the effect of different land use of saline-alkali soil on the soil salinization characteristics

the field investigation

sampling and indoor analysis were conducted. The morphological characteristics

soluble salt content

composition of salt ions

total alkalinity

alkalinity and other indicators of soil profile were studied in six soil depths under five land use

namely

forest land

agricultural land

grassland

improved land and salt wasteland in Hetao plain. The results showed that there were significant differences in soil structure

color

root distribution

lime reaction and alkalinization of soil in different land use systems. The distribution of soluble salt and anion in soil profile was different due to different land use. Among them

grassland and forest land

were "olive"

salt wasteland and improved land were "surface accumulation"

and agricultural land was "bottom accumulation". The distribution characteristics of soil pH

alkalinity and total alkalinity in the profile were basically the same

showing an "S" pattern. The salinization degree and alkalinization degree of soil decreased with the different land use of saline-alkali soil

among which agricultural land was the most obvious. The total salinity

total pH alkalinity and ESP values of 0—20 cm soil decreased to 0.88 g/kg

7.83

0.17 cmol/kg and 12.54%

respectively

indicating that soda-saline and alkaline land was more conducive to soil desalination and dealkalization after agricultural use. Soil total salinity

Ca2+

Mg2+

SO42-

total alkalinity and pH were the main factors of salinization in the studied area. These research results could provide technical reference for clarifying the salinization process and the improvement of salinized soil in Hetao plain.

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