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Aim <p>This study aims to clarify the effects of mushroom residual compost addition on soil nitrogen (N) retention capacity and N uptakes by rice, and to elucidate the underlying mechanisms.</p> Methods <p>Two-year field trials were conducted at two separate locations to study the effects of three soil conditioners -including mushroom residue compost -on soil N adsorption capacity, soil electrochemical properties, and N uptake and utilization.</p> Results <p>EM addition improved soil NH₄⁺ adsorption capacity significantly. The maximum soil NH₄⁺ adsorption capacity (qₘ) at the SGV and GTV sites were increased by 2.3-fold and 2.6-fold, respectively, compared with that of the conventional fertilization (FP) treatment. The enhanced adsorption capacity reduced N loss, and increased N uptake and grain yield of rice. The N uptakes by rice at the SGV and GTV sites were increased by 18.23%-21.49% and 15.23%-15.96%, respectively, compared with that of the FP treatment. The results of soil surface electrochemical properties showed that soil surface potential, surface charge density and electric field strength of the EM treatment were increased by 14.4%–35.4%, 24.0%–70.9%, and 24.0%–70.9% respectively, compared with that of the FP treatment. Partial least squares path modeling confirmed that enhanced soil electrochemical properties directly improved N retention capacity and increased N uptake and grain yield of rice.</p> Conclusion <p>Mushroom residue compost enhanced the nutrient-holding capacity of soils by altering the electrochemical properties, thereby promoting the uptake and utilization of N. It is recommended that this type of soil conditioner be applied and promoted in soils with poor nutrient-holding capacity.</p> Graphical Abstract <p></p>

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Mushroom residue compost addition improves soil N retention capacity and uptakes of rice by enhancing electrochemical properties

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • Yudong Cao,
  • Yuan Zhang,
  • Shishi Liu,
  • Zhifeng Lu,
  • Wenjun Zhang,
  • Xiaokun Li

摘要

Aim

This study aims to clarify the effects of mushroom residual compost addition on soil nitrogen (N) retention capacity and N uptakes by rice, and to elucidate the underlying mechanisms.

Methods

Two-year field trials were conducted at two separate locations to study the effects of three soil conditioners -including mushroom residue compost -on soil N adsorption capacity, soil electrochemical properties, and N uptake and utilization.

Results

EM addition improved soil NH₄⁺ adsorption capacity significantly. The maximum soil NH₄⁺ adsorption capacity (qₘ) at the SGV and GTV sites were increased by 2.3-fold and 2.6-fold, respectively, compared with that of the conventional fertilization (FP) treatment. The enhanced adsorption capacity reduced N loss, and increased N uptake and grain yield of rice. The N uptakes by rice at the SGV and GTV sites were increased by 18.23%-21.49% and 15.23%-15.96%, respectively, compared with that of the FP treatment. The results of soil surface electrochemical properties showed that soil surface potential, surface charge density and electric field strength of the EM treatment were increased by 14.4%–35.4%, 24.0%–70.9%, and 24.0%–70.9% respectively, compared with that of the FP treatment. Partial least squares path modeling confirmed that enhanced soil electrochemical properties directly improved N retention capacity and increased N uptake and grain yield of rice.

Conclusion

Mushroom residue compost enhanced the nutrient-holding capacity of soils by altering the electrochemical properties, thereby promoting the uptake and utilization of N. It is recommended that this type of soil conditioner be applied and promoted in soils with poor nutrient-holding capacity.

Graphical Abstract