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The effect of potato cultivar differences on parameters in WOFOST

Authors
  • ten Den, Tamara
  • van de Wiel, Inge
  • de Wit, Allard
  • van Evert, Frits
  • Van Ittersum, Martin
  • Reidsma, Pytrik
Publication Date
Feb 03, 2020
Source
HAL-Descartes
Keywords
Language
English
License
Unknown
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Abstract

WOFOST is a generic crop model which has been applied for many crops including potatoes (de Wit et al., 2018). However, some of the crop parameter sets require revision as they are outdated. For example, for potato the values for important parameters were derived from cultivar Bintje (Wang et al., 2018). Bintje was popular in the 1960s to 1980s but has now largely been replaced by modern cultivars. Therefore, the objectives of this study are to update the model parameters for potato in WOFOST and consider if these differences matter for model calibration using data from new experimental trials. This should provide farmers, industry and researchers with an improved cultivar-specific model results that can be used for estimating yield potentials, impact of water and nitrogen management, and impacts of climate variability and change. Our focus is on parameters related to photosynthesis and biomass allocation. It is expected that there will be differences between modern cultivars and the current model values, most apparent in biomass allocation, less so for photosynthesis.

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