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June 20, 2026Discover Soil.Open Access

Dissolution of “sparingly soluble phosphates” in soil by polyacrylic super absorbent polymers

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Authors

MMMihoko MoriizumiHIHarumi InoueKSKanako Suzuki

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Overview

Randomized trial evaluates phosphorus solubilization in agricultural soils, suggesting a sustainable approach for nutrient availability.

Key Points

  • This study aims to assess the effectiveness of polyacrylic acid-based superabsorbent polymers in solubilizing sparingly soluble phosphates in soil.
  • Conducted bioassays and dissolution experiments to evaluate the ability of SAPs to release phosphorus from sparingly soluble forms.
  • Applied a 0.08% SAP solution in lettuce cultivation to measure plant growth and phosphorus uptake in both high-P and low-P soils.
  • Performed mechanistic investigations to analyze the processes involved in phosphorus dissolution with SAPs.
  • In lettuce cultivation, the 0.08% SAP solution increased phosphorus uptake by 1.6-fold in high-P soil and 1.4-fold in low-P soil (p < 0.05).
  • Dissolution experiments demonstrated that SAPs can solubilize phosphate ions from agricultural soils and Al/Fe-bound phosphates like variscite and vivianite.
  • Mechanistic analysis indicated that P dissolution primarily occurs through diffusion-driven processes.

Cite This Study

Moriizumi et al. (2026) studied this question.

synapsesocial.com/papers/6a363326db0793dc1a53993fhttps://doi.org/10.1007/s44378-026-00232-x
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