Summary
This study investigates the mechanisms by which organo-mineral associations stabilise century-old pyrogenic organic matter in arable cropland soils. By examining long-established field sites, the authors as suggested by the title demonstrate that mineral-organic binding is a primary factor preserving ancient charred organic material against microbial decomposition, with implications for understanding soil carbon persistence and historical land management impacts on soil carbon stocks.
UK applicability
UK soils with long cultivation histories and potential legacy pyrogenic organic matter (from historical charring practices, biomass burning, or soil amendments) may exhibit similar stabilisation mechanisms. The findings are relevant to UK soil carbon monitoring and predictions of soil organic matter persistence under continued arable management.
Key measures
Organo-mineral association strength, pyrogenic organic matter concentration, carbon stabilisation mechanisms, soil mineral composition
Outcomes reported
The study examined how organo-mineral associations contribute to the long-term stabilisation of pyrogenic organic matter (charcoal and char-like substances) in century-old cropland soils. The research quantified the role of mineral-organic interactions in protecting aged pyrogenic carbon from decomposition.
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