Summary
This research examined how organo-mineral associations contribute to the persistence of pyrogenic organic matter in cropland soils over century timescales. The findings, as suggested by the title, indicate that mineral-organic bonding is a primary mechanism stabilising ancient charred carbon in agricultural systems, which has implications for understanding soil carbon cycling and long-term carbon sequestration potential in managed soils.
UK applicability
The mechanisms identified are likely applicable to UK cropland soils with similar mineralogy and management history, particularly in understanding carbon storage potential in arable systems. However, site-specific factors such as soil texture, pH and clay mineralogy would influence the strength of organo-mineral associations in UK conditions.
Key measures
Soil organic matter fractionation, organo-mineral complex composition, pyrogenic carbon age and stability, mineral association strength
Outcomes reported
The study investigated mechanisms of long-term stabilisation of pyrogenic organic matter (biochar-like material) in agricultural soils, focusing on the role of organo-mineral associations in protecting century-old carbon from decomposition.
Topic tags
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