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Hydrochar Derived from Spent Mushroom Substrate Ameliorates Soil Properties and Nutrient Levels in Saline–Sodic Soil: An Incubation Study

Author

Listed:
  • Yuanhui Chen

    (Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
    College of Resource and Environment, Jilin Agricultural University, Changchun 130118, China)

  • Zhengxiao Sun

    (College of Resource and Environment, Jilin Agricultural University, Changchun 130118, China)

  • Yingjie Su

    (Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China)

  • Jinxia Yang

    (College of Resource and Environment, Jilin Agricultural University, Changchun 130118, China)

  • Mingtang Li

    (Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
    College of Resource and Environment, Jilin Agricultural University, Changchun 130118, China)

  • Bo Hong

    (Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China
    College of Resource and Environment, Jilin Agricultural University, Changchun 130118, China)

  • Guang Chen

    (Key Laboratory of Straw Comprehensive Utilization and Black Soil Conservation, Ministry of Education, Jilin Agricultural University, Changchun 130118, China)

Abstract

Hydrothermal carbonization is a promising strategy for the resource utilization of agricultural wastes. However, the effect of hydrochar on ameliorating saline–sodic soil remains unclear. In the present study, a novel hydrochar amendment was prepared from spent mushroom substrate (SMSHC), followed by an incubation study of saline–sodic soil samples with different pH values (A, pH 9.83; B, pH 8.98; C, pH 8.21). The results demonstrated that SMSHC reduced the adverse effects of saline–sodic soil effectively, and the best effect was obtained when 6% SMSHC was added. Soil pH and ESP decreased by 0.34–0.75 units and 1.0–13.0% at 6% SMSHC loading, respectively. The maximum percentage increase in the soil’s available N, available P, and DOC was 72.3, 221, and 408%, respectively. In the subsequent rice pot seedling experiment, decreased malondialdehyde (MDA) content and increased K + /Na + ratio, proline, soluble sugar, total N, and total P in plant samples were observed. This study verifies hydrothermal carbonization as an alternative method, except for the widely used pyrolysis, to recycle biomass wastes into valuable products for soil remediation.

Suggested Citation

  • Yuanhui Chen & Zhengxiao Sun & Yingjie Su & Jinxia Yang & Mingtang Li & Bo Hong & Guang Chen, 2022. "Hydrochar Derived from Spent Mushroom Substrate Ameliorates Soil Properties and Nutrient Levels in Saline–Sodic Soil: An Incubation Study," Sustainability, MDPI, vol. 14(20), pages 1-12, October.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:20:p:12958-:d:938434
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