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Element interactions limit soil carbon storage.

Kees-Jan van Groenigen·Johan Six·Bruce A Hungate·Marie-Anne de Graaff·Nico van Breemen·Chris van Kessel
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Abstract

Rising levels of atmospheric CO2 are thought to increase C sinks in terrestrial ecosystems. The potential of these sinks to mitigate CO2 emissions, however, may be constrained by nutrients. By using metaanalysis, we found that elevated CO2 only causes accumulation of soil C when N is added at rates well above typical atmospheric N inputs. Similarly, elevated CO2 only enhances N2 fixation, the major natural process providing soil N input, when other nutrients (e.g., phosphorus, molybdenum, and potassium) are added. Hence, soil C sequestration under elevated CO2 is constrained both directly by N availability and indirectly by nutrients needed to support N2 fixation.

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CarbonCarbon DioxideEcosystemGreenhouse EffectNitrogenNitrogen FixationPlant DevelopmentPlantsSoilJournal ArticleMeta-AnalysisResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, Non-P.H.S.

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Kees-Jan van Groenigen, Johan Six, Bruce A Hungate, Marie-Anne de Graaff, Nico van Breemen, Chris van Kessel. 2006-04-13. Element interactions limit soil carbon storage.. https://doi.org/10.1073/pnas.0509038103

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