Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China
The surface of cohesive soda saline-alkali soil in the Songnen Plain of China exhibits obvious desiccation cracking phenomenon during water evaporation. Quantitative research on the process and influencing factors of desiccation cracking are significant for determining the mechanical properties of s...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/13/6/1153 |
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| author | Zhuopeng Zhang Xiaojie Li Jianhua Ren Shuang Zhou |
| author_facet | Zhuopeng Zhang Xiaojie Li Jianhua Ren Shuang Zhou |
| author_sort | Zhuopeng Zhang |
| collection | DOAJ |
| description | The surface of cohesive soda saline-alkali soil in the Songnen Plain of China exhibits obvious desiccation cracking phenomenon during water evaporation. Quantitative research on the process and influencing factors of desiccation cracking are significant for determining the mechanical properties of salt-affected soil, improving the salinization status and the local ecological environment. This study aims to conduct laboratory-controlled cracking experiments on soda saline-alkali soils, and to regularly measure the soil moisture and the cracking status of 40 soil samples. After processing the crack images uniformly, crack characteristics including crack length, crack area, contrast texture feature, and box-counting fractal dimension are extracted. The results indicate that the decrease in soil moisture can be divided into three stages such as fast evaporation stage, slow evaporation stage and stable evaporation stage, and that the evaporation rate shows a linear negative correlation with soil salinity. The measurements also indicate that crack length rapidly increases and reaches stability with a decrease in water content compared with the crack area. The high correlation between different crack characteristics and the soil total salinity (correlation coefficient from 0.44 to 0.95) shows that salt content is the dominant factor affecting the desiccation cracking of soda saline-alkali soil. A multiple linear regression prediction model was finally established based on crack characteristics for different salinity parameters with high prediction accuracy for Na<sup>+</sup>, EC and total salinity (R<sup>2</sup> > 0.91 and RPD > 2.5) and also certain prediction accuracy for Cl<sup>−</sup> and CO<sub>3</sub><sup>2−</sup> (R<sup>2</sup> > 0.66 and RPD > 1.5). |
| first_indexed | 2024-03-11T02:53:07Z |
| format | Article |
| id | doaj.art-b5b1a39d97624a8e860f3473acc969bd |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-11T02:53:07Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-b5b1a39d97624a8e860f3473acc969bd2023-11-18T08:51:04ZengMDPI AGAgriculture2077-04722023-05-01136115310.3390/agriculture13061153Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, ChinaZhuopeng Zhang0Xiaojie Li1Jianhua Ren2Shuang Zhou3Heilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, ChinaNortheast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, ChinaHeilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, ChinaHeilongjiang Province Key Laboratory of Geographical Environment Monitoring and Spatial Information Service in Cold Regions, Harbin Normal University, Harbin 150025, ChinaThe surface of cohesive soda saline-alkali soil in the Songnen Plain of China exhibits obvious desiccation cracking phenomenon during water evaporation. Quantitative research on the process and influencing factors of desiccation cracking are significant for determining the mechanical properties of salt-affected soil, improving the salinization status and the local ecological environment. This study aims to conduct laboratory-controlled cracking experiments on soda saline-alkali soils, and to regularly measure the soil moisture and the cracking status of 40 soil samples. After processing the crack images uniformly, crack characteristics including crack length, crack area, contrast texture feature, and box-counting fractal dimension are extracted. The results indicate that the decrease in soil moisture can be divided into three stages such as fast evaporation stage, slow evaporation stage and stable evaporation stage, and that the evaporation rate shows a linear negative correlation with soil salinity. The measurements also indicate that crack length rapidly increases and reaches stability with a decrease in water content compared with the crack area. The high correlation between different crack characteristics and the soil total salinity (correlation coefficient from 0.44 to 0.95) shows that salt content is the dominant factor affecting the desiccation cracking of soda saline-alkali soil. A multiple linear regression prediction model was finally established based on crack characteristics for different salinity parameters with high prediction accuracy for Na<sup>+</sup>, EC and total salinity (R<sup>2</sup> > 0.91 and RPD > 2.5) and also certain prediction accuracy for Cl<sup>−</sup> and CO<sub>3</sub><sup>2−</sup> (R<sup>2</sup> > 0.66 and RPD > 1.5).https://www.mdpi.com/2077-0472/13/6/1153Songnen Plaindesiccation crackingsalinitysoil salinizationmultiple linear |
| spellingShingle | Zhuopeng Zhang Xiaojie Li Jianhua Ren Shuang Zhou Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China Agriculture Songnen Plain desiccation cracking salinity soil salinization multiple linear |
| title | Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China |
| title_full | Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China |
| title_fullStr | Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China |
| title_full_unstemmed | Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China |
| title_short | Study on the Drying Process and the Influencing Factors of Desiccation Cracking of Cohesive Soda Saline-Alkali Soil in the Songnen Plain, China |
| title_sort | study on the drying process and the influencing factors of desiccation cracking of cohesive soda saline alkali soil in the songnen plain china |
| topic | Songnen Plain desiccation cracking salinity soil salinization multiple linear |
| url | https://www.mdpi.com/2077-0472/13/6/1153 |
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