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Aims <p>Excessive fertilizer use has led to severe continuous cropping obstacles in plastic-shed vegetable production, including soil secondary salinization and soil-borne diseases such as cucumber Fusarium wilt. This study aimed to evaluate the effectiveness of a water spinach (<i>Ipomoea aquatica</i> Forsk.)–cucumber (<i>Cucumis sativus</i> L.) wet–dry rotation combined with straw mulching in mitigating these continuous cropping obstacles and to assess its associated environmental impacts.</p> Methods <p>A two-year field experiment was conducted in six plastic sheds that had continuously cultivated cucumbers for six years. During the hot summer, water spinach was grown with wheat straw mulching (10,000&#xa0;kg&#xa0;ha⁻<sup>1</sup>) to establish the wet–dry rotation. Maintaining high temperature by closing sheds was used as the control. Cucumbers were subsequently planted in autumn to assess effects on soil and crop performance.</p> Results <p>After 80&#xa0;days, straw decomposition reached 83.8–84.2% on the wet surface. Compared with the control, the treatment significantly mitigated soil secondary salinization and reduced N leaching, and significantly increased soil available K, total N, P, and K, total organic C, microbial biomass C and N, and activities of urease, acid phosphatase, and sucrase in summer and autumn. <i>Fusarium oxysporum</i> f. sp. <i>cucumerinum</i> was significantly suppressed, reducing disease index and increasing cucumber yield. N₂O emissions and net global warming potential significantly declined in both crop seasons.</p> Conclusions <p>Wet–dry rotation plus straw mulching improved soil fertility, suppressed soil-borne disease, reduced environmental risks, and increased cucumber yield. This approach provides a sustainable strategy for managing continuous cropping obstacles in intensive plastic-shed vegetable systems.</p>

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Wet-dry rotation plus straw mulching alleviates soil secondary salinization, nitrogen leaching, cucumber Fusarium wilt and net global warming potential

  • 期刊论文

  • 发表日期：

    2026年1月10日

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  • Zijian Zheng,
  • Wangpei Zhou,
  • Xiaoping Zeng,
  • Xueshuang Gao,
  • Feng Ding,
  • Jinjun Ma,
  • Zhiping Zhang,
  • Jiexia Liu,
  • ABDULLAHI MUHAMMAD WAIYA,
  • Minmin Miao

摘要

Aims

Excessive fertilizer use has led to severe continuous cropping obstacles in plastic-shed vegetable production, including soil secondary salinization and soil-borne diseases such as cucumber Fusarium wilt. This study aimed to evaluate the effectiveness of a water spinach (Ipomoea aquatica Forsk.)–cucumber (Cucumis sativus L.) wet–dry rotation combined with straw mulching in mitigating these continuous cropping obstacles and to assess its associated environmental impacts.

Methods

A two-year field experiment was conducted in six plastic sheds that had continuously cultivated cucumbers for six years. During the hot summer, water spinach was grown with wheat straw mulching (10,000 kg ha⁻1) to establish the wet–dry rotation. Maintaining high temperature by closing sheds was used as the control. Cucumbers were subsequently planted in autumn to assess effects on soil and crop performance.

Results

After 80 days, straw decomposition reached 83.8–84.2% on the wet surface. Compared with the control, the treatment significantly mitigated soil secondary salinization and reduced N leaching, and significantly increased soil available K, total N, P, and K, total organic C, microbial biomass C and N, and activities of urease, acid phosphatase, and sucrase in summer and autumn. Fusarium oxysporum f. sp. cucumerinum was significantly suppressed, reducing disease index and increasing cucumber yield. N₂O emissions and net global warming potential significantly declined in both crop seasons.

Conclusions

Wet–dry rotation plus straw mulching improved soil fertility, suppressed soil-borne disease, reduced environmental risks, and increased cucumber yield. This approach provides a sustainable strategy for managing continuous cropping obstacles in intensive plastic-shed vegetable systems.