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<p>Soil salt accumulation and declining soil organic carbon (SOC) pose major challenges to intensive vegetable production. Although biochar can enhance SOC, its effects on soil salinity and the role of salt-tolerant cover crops remain underexplored. A long-term field experiment was conducted using straw-derived biochar applied at 0, 10, 20 and 40 t ha<sup>-1</sup> in a randomised complete block design. The effects of Sorghum sudanense cultivation on soil salinity, nutrient dynamics, SOC and C:N:P stoichiometry in biochar-amended fields were evaluated. Sorghum sudanense rotation effectively mitigated soil salinity while maintaining SOC stability, with optimal outcomes observed at moderate biochar application. High biochar rates enhanced SOC and accelerated its decomposition under elevated salinity. Overall, Sorghum sudanense rotation in biochar-amended vegetable fields offers practical strategy for sustainable intensive agriculture.</p>

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Sorghum sudanense Rotation Alleviates Biochar-Induced Salinity Accumulation While Maintaining Soil Organic Carbon Stability in Intensive Vegetable Systems

  • 期刊论文

  • 发表日期：

    2026年6月18日

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  • Jining Zhang,
  • Huifeng Sun,
  • Shanliang Liu,
  • Cong Wang,
  • Xianxian Zhang,
  • Zheng Jiang,
  • Sheng Zhou

摘要

Soil salt accumulation and declining soil organic carbon (SOC) pose major challenges to intensive vegetable production. Although biochar can enhance SOC, its effects on soil salinity and the role of salt-tolerant cover crops remain underexplored. A long-term field experiment was conducted using straw-derived biochar applied at 0, 10, 20 and 40 t ha-1 in a randomised complete block design. The effects of Sorghum sudanense cultivation on soil salinity, nutrient dynamics, SOC and C:N:P stoichiometry in biochar-amended fields were evaluated. Sorghum sudanense rotation effectively mitigated soil salinity while maintaining SOC stability, with optimal outcomes observed at moderate biochar application. High biochar rates enhanced SOC and accelerated its decomposition under elevated salinity. Overall, Sorghum sudanense rotation in biochar-amended vegetable fields offers practical strategy for sustainable intensive agriculture.