%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Ibrahim, H.
%A Pansu, Marc
%A Blavet, Didier
%A Hatira, A.
%A McDonald, P.
%A Bernoux, Martial
%A Drevon, J. J.
%T Modelling the continuous exchange of carbon between living organisms, the soil and the atmosphere
%D 2016
%L fdi:010066212
%G ENG
%J Plant and Soil
%@ 0032-079X
%K Carbon flows ; Microbial biomass ; Microbial exchanges ; Model proposition ; Agro-ecology ; Global change
%M ISI:000368550700029
%N 1-2
%P 381-397
%R 10.1007/s11104-015-2665-4
%U https://www.documentation.ird.fr/hor/fdi:010066212
%> https://www.documentation.ird.fr/intranet/publi/2016/03/010066212.pdf
%V 398
%W Horizon (IRD)
%X This study evaluated a framework for modelling the continuous exchange of carbon (C) between the atmosphere, plants, humus, and microorganisms, proposing a plant C model coupled to MOMOS, an existing microbial C model. C data were collected on low fertility cereal-legume cropping systems. Plant C and microbial C were modelled simultaneously and the growth parameters of plants and nitrogen-fixing microorganisms were fitted to the data. All C exchanges were successfully predicted using the same weather correction for plant and microbial processes. Most of the photosynthetic production was allocated to the roots, reducing yields. The C losses were found modelled mainly by root respiration for cereals, probably as an energy source for nutrient explorings, and by root mortality for legumes as a growth source for decomposers and symbiotic nodules. The effect of root-nodule activity on shoot growth was found non-linear. The system was modelled as a sink of 4.2 Mg C ha(-1) year(-1) in the soil's labile C reserve. This paper coordinates theoretical bases for modelling the processes regulating plant productivity associated with plant C losses. The tool appears to be robust and is now available for calculating the essential parameters of agro-ecology and climate change.
%$ 074 ; 020 ; 076 ; 082