Modeling the relationship between the soil water content, nutrient availability and its absorption for Carica papaya L. in a low fertility soil

  • 1 February, 2018
  • 1 November, 2022
  • Wageningen University, Soil Physics and Land Management
  • prof. dr ir SEATM van der Zee

To improve the yields and water and nutrient management in Carica papaya is necessary to establish basic soil and plant parameters (inputs) for modelling and validate those models for different soil’s conditions.
Therefore, it is necessary to estimate geochemical multicomponent behaviour of solutes in the soil solution, as for papaya production normally is applied a multi-nutrient fertilization, as well as its hydrological parameters. This project focus on the determination of soil parameters, use, coupling and validation of different models in Inceptisols of the Costa Rican Caribbean Region, to describe the water and nutrient movement and its availability using models like ORCHESTRA and SWAP, which have been coupled and used for heavy metal modelling, but not for macronutrients in a multicomponent scenario. The Inceptisols of this region have been categorized as: (A) volcanic ash derived with medium-low fertility, (B) alluvials with high fertility, and (C) weathered soils.
Additionally, this project aims the integration of geochemical and agro-hydrological models with crop growth models (i.e. WOFOST, DSSAT), targeting the modelling of crop growth and yield in different soils and water and nutrient management practices. Crop growth modelling in papaya is nowadays not possible as it needs to be parameterized and validated.
The goal of this project is to improve the yield and predict the effect of water and nutrient management practices in papaya crop systems through modelling, as well as coupling and validating different models to improve the scheduling and dosage of fertilization, reducing its environmental impact on water resources in a region prone to leaching contamination.


Róger Armando Fallas Corrales

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