ArticleFrontiers in plant science2026
Influence of carbon-based organic fertilizer on soil microorganisms and vegetable growth in Sb-As co-contaminated soil: a synergistic mechanism of promotion and detoxification.
Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Antimony (Sb) and arsenic (As) co-contamination threatens crop production and food safety. Carbon-based organic fertilizers may simultaneously improve soil fertility, regulate microbial communities, and reduce metal(loid) mobility, but their performance in Sb-As co-contaminated vegetable systems remains unclear. Methods: A pot experiment with pak choi was conducted to compare different carbon-based amendments, including magnesium sulfate-loaded biochar-based organic fertilizer (CBOF-M). Soil chemistry, pore-water elements, enzyme activities, rhizosphere microbial communities, plant growth, and elemental accumulation were evaluated. Results: Carbonaceous amendments reduced Sb mobility but increased As solubility. CBOF-M increased soil carbon, produced the highest plant biomass, reduced Sb translocation to edible tissues, and enriched Bacteroidota and Gemmatimonadota. Structural equation modeling identified an indirect microbiome-mediated pathway and a direct enzyme-mediated nutrient-cycling pathway. Conclusion: Magnesium sulfate-loaded biochar-based organic fertilizer produced a promotion-detoxification synergy, although As mobilization remains a key constraint requiring formulation-specific control.
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