Effects of modelling detail on simulated potential crop yields under a wide range of climatic conditions

Autor: Frank Ewert, H. van Keulen, Myriam Adam, L.G.J. van Bussel, Peter A. Leffelaar
Přispěvatelé: Fonctionnement et conduite des Systèmes de culture Tropicaux et Méditerranéens, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Plant Production Systems Group, Wageningen University and Research [Wageningen] (WUR), Plant Research International (PRI), Netherlands Environmental Assessment Agency, Wageningen University and Research Centre (WUR), Rheinische Friedrich-Wilhelms-Universität Bonn
Jazyk: angličtina
Rok vydání: 2011
Předmět:
0106 biological sciences
climatic variability
air co2 enrichment
leaf senescence
Atmospheric sciences
01 natural sciences
crop growth model
light interception
growth simulation
light-use efficiency
Range (statistics)
Sensitivity (control systems)
Leaf area index
2. Zero hunger
carbon balance
Biomass (ecology)
elevated co2
leaf area index
radiation use efficiency
Ecology
Ecological Modeling
Crop yield
04 agricultural and veterinary sciences
indice foliaire (LA!)
15. Life on land
sénescence des feuilles
PE&RC
model complexity
PPO/PRI AGRO Duurzame Bedrijfssystemen
spring wheat
Plant Production Systems
terrestrial biosphere
13. Climate action
stomatal conductance
Plantaardige Productiesystemen
040103 agronomy & agriculture
0401 agriculture
forestry
and fisheries
Environmental science
complexité du modèle
Interception
Crop simulation model
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
leaf-area index
Level of detail
010606 plant biology & botany
Zdroj: Ecological Modelling
Ecological Modelling, Elsevier, 2011, 222 (1), pp.131-143. ⟨10.1016/j.ecolmodel.2010.09.001⟩
Ecological Modelling, 222(1), 131-143
Ecological Modelling 222 (2011) 1
ISSN: 0304-3800
DOI: 10.1016/j.ecolmodel.2010.09.001
Popis: Contact: Office.PP@wur.nl; International audience; Crop simulation models are widely applied at large scale for climate change impact assessment or integrated assessment studies. However, often a mismatch exists between data availability and the level of detail in the model used. Good modelling practice dictates to keep models as simple as possible, but enough detail should be incorporated to capture the major processes that determine the system's behaviour. The objective of this study was to investigate the effect of the level of detail incorporated in process-based crop growth models on simulated potential yields under a wide range of climatic conditions. We conducted a multi-site analysis and identified that by using a constant radiation use efficiency (RUE) value under a wide range of climatic conditions, the description of the process of biomass production may be over-simplified, as the effects of high temperatures and high radiation intensities on this parameter are ignored. Further, we found that particular attention should be given to the choice of the light interception approach in a crop model as determined by leaf area index (LA!) dynamics. The two LAI dynamics approaches considered in this study gave different simulated yields irrespective of the characteristics of the location and the light interception approaches better explained the differences in yield sensitivity to climatic variability than the biomass production approaches. Further analysis showed that differences between the two IAI dynamics approaches for simulated yields were mainly due to different representations of leaf senescence in both approaches. We concluded that a better understanding and modelling of leaf senescence, particularly its onset, is needed to reduce model uncertainty in yield simulations.
Databáze: OpenAIRE
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