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Dynamics of organic matter under eucalyptus clonal plantations in Congo

Abstract : In fast-growing plantation ecosystems under the tropics, soil organic matter (SOM) plays a key role with regards to soil fertility and production sustainability. The main objective of this study was to understand and model SOM decomposition dynamics under an industrial eucalyptus plantation, in relation with environmental factors and silvicultural practices. Combining isotopic tracing (in natural abundance of 13C for a savannah/eucalyptus land use change and in enrichment with 15N) and particle-size fractionation enabled us to follow the fate of mineral and organic nitrogen inputs. Decomposition experiments using 15N labelled-litter, which were designed and tested in European beech forests and reproduced in the Congo, helped elaborate and calibrate a continuous evolution model of SOM carbon and nitrogen.
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Submitted on : Thursday, September 17, 2009 - 8:00:00 AM
Last modification on : Thursday, September 17, 2009 - 8:00:00 AM
Long-term archiving on: : Thursday, September 30, 2010 - 9:06:15 PM

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Rémi d'Annunzio. Dynamics of organic matter under eucalyptus clonal plantations in Congo. Life Sciences [q-bio]. AgroParisTech, 2008. English. ⟨NNT : 2008AGPT0005⟩. ⟨pastel-00005236⟩

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