Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (9): 2309-2313.DOI: 10.16178/j.issn.0528-9017.20250104

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Effects of amendments and irrigation methods on salt leaching efficiency in clayey saline soil of southern Zhejiang

YANG Jian1(), ZHANG Mingkui2(), WANG Liang3   

  1. 1.Plant Protection,Quarantine,and Agricultural Product Quality Safety Guarantee Center of of Longwan District,Wenzhou City,Wenzhou 325024,Zhejiang
    2.College of Environmental and Resource Sciences,Zhejiang University,Hangzhou 310058,Zhejiang
    3.Wenzhou Vocational College of Science & Technology(Wenzhou Academy of Agricultural Sciences),Wenzhou 325006,Zhejiang
  • Received:2025-02-14 Online:2026-09-11 Published:2026-09-24
  • Contact: ZHANG Mingkui

Abstract:

To explore rapid improvement techniques for coastal clayey saline soil,this study used indoor soil column leaching simulation to compare the effects of different irrigation methods(freshwater,calcium-containing freshwater,and alternating brackish water and freshwater)and soil application of desulfurization gypsum on salt leaching efficiency. The results showed that applying desulfurization gypsum to the soil accelerated the infiltration rate of irrigation water and promoted the leaching of water-soluble salts. Under the same soil treatment conditions,the salt removal efficiencies of the three irrigation methods were in the order:calcium-containing freshwater > alternating brackish water and freshwater > freshwater. Freshwater irrigation tended to cause soil alkalinization,whereas calcium-containing freshwater alleviated alkalinization;desulfurization gypsum application effectively inhibited alkalinization during the leaching process. In conclusion,using desulfurization gypsum for soil improvement combined with calcium-containing freshwater or alternating brackish water and freshwater irrigation can accelerate soil desalination and improve salt leaching efficiency.

Key words: clayey saline soil, salt leaching, desulfurization gypsum, Zhejiang

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