Summary
This study examined phosphorus retention mechanisms in peatland Histosols from the Oder Valley, comparing eutrophic and dystrophic habitats to understand how organic matter transformation influences phosphorus availability. Humic substances played a dominant role in phosphorus retention, with humic acids being particularly important at low pH, though the magnitude of this effect differed substantially between habitat types. The findings suggest that organic matter type and soil environmental conditions determine phosphorus mobility, with implications for both conservation of sensitive ecosystems and agricultural phosphorus management.
UK applicability
The findings are relevant to UK peatland conservation and management, particularly in upland regions where peat disturbance can release mobile phosphorus forms and cause eutrophication of downstream waters. The results may also inform phosphorus management strategies in organic and regenerative farming systems on organic soils, though direct applicability depends on UK peat and soil types.
Key measures
Total phosphorus (Pt), organic phosphorus (Po), available phosphorus (PM3), easily soluble phosphorus (PCaCl2), water-soluble phosphorus (PW), phosphorus in humic acids (Po_HA) and fulvic acids (Po_FA), soil pH, organic matter composition, macronutrient ratios
Outcomes reported
The study measured multiple phosphorus forms (total, organic, available, easily soluble, and water-soluble P) and humic substance fractions in peatland soil profiles from eutrophic and dystrophic habitats. It characterised how organic matter decomposition affects phosphorus mobility and retention in different peatland environments.
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