Comparing AquaCrop and CropSyst models in simulating barley growth under different water and Nitrogen regimes. Does calibration year influence the performance of crop growth models? (Comunicazione a convegno)

Type
Label
  • Comparing AquaCrop and CropSyst models in simulating barley growth under different water and Nitrogen regimes. Does calibration year influence the performance of crop growth models? (Comunicazione a convegno) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Alternative label
  • Abi Saab M.T., Todorovic M., Albrizio R. (2013)
    Comparing AquaCrop and CropSyst models in simulating barley growth under different water and Nitrogen regimes. Does calibration year influence the performance of crop growth models?
    in 1st CIGR Inter-Regional Conference on Land and Water Challenges, Bari, 10-14 settembre
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Abi Saab M.T., Todorovic M., Albrizio R. (literal)
Pagina inizio
  • 99 (literal)
Pagina fine
  • 99 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Proceedings of the 1st CIGR Inter-Regional Conference on Land and Water Challenges on \"Water, environment and agriculture: challenges for sustainable development\" (literal)
Note
  • Abstract (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • cnr ISAFOM, CIHEAM-IAMB, LARI, Lebanon (literal)
Titolo
  • Comparing AquaCrop and CropSyst models in simulating barley growth under different water and Nitrogen regimes. Does calibration year influence the performance of crop growth models? (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • Lamaddalena N., Todorovic M., Pereira L.S. (literal)
Abstract
  • This work investigated the performance of AquaCrop and CropSyst crop growth models in simulating barley growth under three water (full irrigation, 50% irrigation and rainfed) and two nitrogen (high and low) conditions with a particular attention to the influence of calibration year on the modelling results. Three years (2006-2008) of data from the experimental work carried out in Southern Italy were used in this study. AquaCrop model was based exclusively on the water productivity (WP) engine normalized for reference evapotranspiration whereas Crop Syst used both solar radiation engine and water productivity engines for the simulation of crop growth. AquaCrop required the recalibration of crop growth parameters under different nitrogen regimes whereas CropSyst used an internal module to adjust the impact of different nitrogen inputs. The models were calibrated for each of three years and then validated for two other years. The overall results pointed out that, for both models, most of crop growth parameters are conservative enough (almost constant) to be used in any of three years. This indicated that only one year of data could be enough for model's calibration confirming the robustness and validity of the approaches adopted by both models. Nevertheless, the performance of the models changed in respect to the year of calibration, from one year to another (i.e. different weather conditions) and for different water and nitrogen regimes. The statistical analysis based only on final biomass and yield for all three years has shown that the performances of AquaCrop are slightly better than that of CropSyst independently on the year of calibration. This was particularly evident for the conditions of non-optimal water and nitrogen supply and could be attributed to several distinctive features of AquaCrop such as: i) the three-thresholds water stress function considering canopy growth, stomatal closure and canopy senescence, ii) the dynamic harvest index function linked to the crop water status, and iii) the model's re-calibration for the conditions of non-optimal nutrient supply. (literal)
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