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Optimized Irrigation Strategies for Saline Soil Remediation in Agricultural Lands Under Water-Limited Conditions

Author

Listed:
  • Chaokun Li

    (Technology Innovation Center for Land Engineering and Human Settlements by Shaanxi Land Engineering Construction Group Co., Ltd. and Xi’an Jiaotong University, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
    These authors contributed equally to this work.)

  • Ye Yang

    (Technology Innovation Center for Land Engineering and Human Settlements by Shaanxi Land Engineering Construction Group Co., Ltd. and Xi’an Jiaotong University, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
    These authors contributed equally to this work.)

  • Hui Xi

    (Technology Innovation Center for Land Engineering and Human Settlements by Shaanxi Land Engineering Construction Group Co., Ltd. and Xi’an Jiaotong University, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
    Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi’an 710075, China)

  • Zhiwen Chen

    (Technology Innovation Center for Land Engineering and Human Settlements by Shaanxi Land Engineering Construction Group Co., Ltd. and Xi’an Jiaotong University, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Yingying Dong

    (Technology Innovation Center for Land Engineering and Human Settlements by Shaanxi Land Engineering Construction Group Co., Ltd. and Xi’an Jiaotong University, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Meiling Liu

    (Technology Innovation Center for Land Engineering and Human Settlements by Shaanxi Land Engineering Construction Group Co., Ltd. and Xi’an Jiaotong University, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Junsheng Liu

    (Shaanxi Academy of Building Research, Xi’an 710082, China)

  • Wendong Wang

    (Technology Innovation Center for Land Engineering and Human Settlements by Shaanxi Land Engineering Construction Group Co., Ltd. and Xi’an Jiaotong University, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

Abstract

Soil salinization is a prevalent global issue, significantly impacting crop cultivation and food production. This study investigates the potential of sustainably harnessing rainwater for the remediation of saline soils in water-scarce regions. Soil column leaching experiments were performed to evaluate the effectiveness of different methods for salt removal from the tillage layer. The findings demonstrated that intermittent leaching was more effective than continuous leaching in remediating NaCl-type saline soils. When continuous leaching with 27 cm of rainwater was applied, the salt removal in soil layers below 5 cm ranged from 12.28% to 26.86%. Intermittent leaching increased the salt removal rate to between 44.49% and 54.18%. This higher desalination efficiency of intermittent leaching is attributable to the extended soil–water contact time. When the leaching time in continuous leaching was increased from 1.5 h to over 4.5 h, comparable desalination effects were produced. The rainwater leaching demonstrated similar salt removal patterns in Na 2 SO 4 -type saline soils. However, due to the stronger affinity of SO 4 2− for clay particles, their effluent concentration and removal were lower than Cl − under the same conditions. To optimize desalination efficiency, operational parameters can be adjusted to reduce the leaching depth of rainwater from 27 cm to 15 cm, and the interval between leaching events from 24 h to 4.5 h. The findings of this study may serve as a valuable reference for saline soil restoration and improvement efforts in water-scarce regions.

Suggested Citation

  • Chaokun Li & Ye Yang & Hui Xi & Zhiwen Chen & Yingying Dong & Meiling Liu & Junsheng Liu & Wendong Wang, 2024. "Optimized Irrigation Strategies for Saline Soil Remediation in Agricultural Lands Under Water-Limited Conditions," Sustainability, MDPI, vol. 16(23), pages 1-13, November.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:23:p:10256-:d:1527633
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    References listed on IDEAS

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    1. Yang, Ting & Cherchian, Setrag & Liu, Xinmin & Shahrokhnia, Hossein & Mo, Minghao & Šimůnek, Jirka & Wu, Laosheng, 2023. "Effect of water application methods on salinity leaching efficiency in different textured soils based on laboratory measurements and model simulations," Agricultural Water Management, Elsevier, vol. 281(C).
    2. Sun, Jiaxia & Kang, Yaohu & Wan, Shuqin & Hu, Wei & Jiang, Shufang & Zhang, Tibin, 2012. "Soil salinity management with drip irrigation and its effects on soil hydraulic properties in north China coastal saline soils," Agricultural Water Management, Elsevier, vol. 115(C), pages 10-19.
    3. Sharma, S. K. & Manchanda, H. R., 1996. "Influence of leaching with different amounts of water on desalinization and permeability behaviour of chloride and sulphate-dominated saline soils," Agricultural Water Management, Elsevier, vol. 31(3), pages 225-235, October.
    4. Eric Britt Moore, 2023. "Challenges and Opportunities for Cover Crop Mediated Soil Water Use Efficiency Enhancements in Temperate Rain-Fed Cropping Systems: A Review," Land, MDPI, vol. 12(5), pages 1-14, April.
    Full references (including those not matched with items on IDEAS)

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