Estimating CO2 fluxes (GPP, RECO, NEE) of diversified crop rotations from STICS outputs

摘要: CO2 emissions constitute 75% of global net anthropogenic emissions (IPCC, 2013), inducing climate change. To study its impacts on cropping systems, modelling studies are primordial, enabling to investigate changing pedoclimatic conditions and to prospect potential farming systems with innovative management. But it is primordial that crop models, when evaluating climate change impacts, consider the interactions between soil organic carbon and carbon dioxide (Basso et al., 2018) not only at the level of a single crop but also for whole crop rotations.With this goal in mind, we used the outputs of STICS in its standard preparameterized version to model the Gross Primary Productivity (GPP), the Ecosystem Respiration (RECO) and the Net Ecosystem Exchange (NEE). We based on the 16-year crop rotation of the ICOS BE-LON site (Belgium), which comprises five different crops (winter wheat, sugarbeet, maize, potato, cover crop), to calibrate and validate our methodology.