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The impacts of different nitrogen forms on fungal weathering of carbonate and insoluble phosphate in the karst red soil
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DOI：10.1016/j.eti.2025.104719.png)
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Abstract
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• N supply can promote the fungal weathering of insoluble phosphate and carbonate in karst soil. • Both biochemical and biomechanical pathways contribute to fungal weathering of insoluble phosphate and carbonate under different N forms. • The formation of calcium oxalate promotes the weathering of carbonate by fungi in karst soil. • Ammonium and urea are more efficient than nitrate in fungal carbonate weathering. • Under NH4+ and urea supply, the ideal fungal carbonate weathering rate increased 80% and 93% compared to no N input.
Keywords:
Aspergillus niger
Carbonate
Fungal weathering
Nitrogen supply
Available phosphorus
Karst soil
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