@article{PAR00022331,
  title = {{A}groecological modeling of nitrogen and carbon transfers between decomposer micro-organisms, plant symbionts, soil and atmosphere in an intercropping system},
  author = {{K}herif, {O}. and {K}eskes, {M}. {I}. and {P}ansu, {M}arc and {O}uaret, {W}. and {R}ebouh, {Y}. {N}. and {D}okukin, {P}. and {K}ucher, {D}. and {L}atati, {M}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he modeling of continuous transfers of carbon ({C}) and nitrogen ({N}) previously published in the literature has paid little attention to the functional role of micro-organisms. {I}n general, only monoculture systems have been modeled. {F}urthermore, there have been few experiments under field conditions at farm scale, where clear evidence for the benefits of intercropping is lacking. {T}his work focus on mechanistic modeling approaches based on the ecological functioning of the microbial biomass, to quantify the daily exchange of {C} and {N} between plant organs, micro-organisms, rhizobial symbionts, soil compartments and the atmosphere in an arable intercropping system. {T}he {MOMOS} model was validated on {C} and {N} data collected from a common bean ({P}haseolus vulgaris {L}. cv. {E}l {D}jadida) and maize ({Z}ea mays {L}. cv. {F}ilou) intercropping system. {T}he experiment was performed at two field sites that were chosen with farmers to represent both high and low soil {P} availability. {T}he results show that all {C} and {N} exchanges were successfully predicted at 5% significance and that they depend on the phenological stage, especially the flowering stage. {I}ncreased {C} allocation from photosynthesis to roots contributed to increasing both grain yield and {N} grain for intercropped maize. {C} and {N} stocks in the common bean nodules were lower in intercropping than in monocultures, and this is associated with the decrease of total atmospheric nitrogen ({N}-2) fixation by intercropped common beans, in particular with a high soil {P}. {H}owever, the rate of {N}-2 fixation was higher in the intercrops than in the monoculture when the soil is {P}-deficient. {M}icro-organisms were responsible for most of the {C} losses from the soil to the atmosphere but intercropping significantly reduced the {C} losses by improving micro-organism {C} use efficiency. {T}hese results uncover the strong link between {N} and {C} stocks, confirming the robustness of the newly formulated {MOMOS} equations that are validated in this paper. {T}his agroecological modeling experiment demonstrated the functional role of microbial biomass, in both the growth of the intercrops crop and their symbiosis, improving the prediction of the daily {C} and {N} flows between plant organs, soil compartments and the atmosphere.},
  keywords = {{I}ntercropping ; {M}icro-organisms ; {P}lant symbionts ; {M}echanistic models ; {C}ontinuous exchange},
  booktitle = {},
  journal = {{E}cological {M}odelling},
  volume = {440},
  numero = {},
  pages = {109390 [17 p.]},
  ISSN = {0304-3800},
  year = {2021},
  DOI = {10.1016/j.ecolmodel.2020.109390},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00022331},
}