Summary
This influential 2002 review by Six et al. synthesises the mechanisms by which soil organic matter is stabilised against decomposition across three principal pathways: physical protection within soil aggregates, chemical stabilisation through sorption to mineral surfaces, and the intrinsic recalcitrance of certain organic compounds. The paper provides a unifying conceptual framework that has become foundational in soil carbon research and has proven applicable across diverse land-use and management systems. The review is widely cited as a reference for understanding SOM dynamics and carbon cycling in agricultural and natural soils.
Regional applicability
The mechanistic framework presented is applicable to UK soils, as the three stabilisation pathways (aggregation, mineral association, recalcitrance) operate across temperate and boreal soils. The review is relevant to UK soil carbon policy, regenerative agriculture initiatives, and soil health monitoring programmes, though site-specific factors (climate, soil type, management history) determine the relative importance of each mechanism.
Key measures
Mechanisms of SOM stabilisation; physical protection within aggregates; chemical stabilisation through mineral association; biochemical recalcitrance of organic compounds
Outcomes reported
The paper synthesises evidence on the principal mechanisms by which soil organic matter (SOM) resists microbial decomposition, examining physical, chemical and biochemical pathways of stabilisation. It presents a conceptual framework integrating soil aggregate protection, mineral-organic associations, and intrinsic recalcitrance of organic compounds.
Topic tags
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