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Adaptation of VegSyst-DSS for macronutrient recommendations of fertigated, soil-grown, greenhouse vegetable crops

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  • Gallardo, Marisa
  • Peña-Fleitas, María Teresa
  • Giménez, Carmen
  • Padilla, Francisco M.
  • Thompson, Rodney B.

Abstract

VegSyst model v3 was calibrated and validated to simulate daily and seasonal P, K, Ca and Mg uptake of soil-grown sweet pepper and muskmelon crops in greenhouses in SE Spain. The model adequately simulated P, K and Mg uptake in three validation crops of sweet pepper, and Ca uptake in one crop. P, K, Ca and Mg uptake were accurately simulated in one validation muskmelon crop. The decision support system VegSyst-DSS v2 was developed by adding a component for recommendations of P, K, Ca and Mg for pepper and muskmelon to VegSyst-DSS v1. The new DSS component, which combines with VegSyst model v3, calculates: (i) daily P, K, Ca and Mg requirement (in kg ha−1) and (ii) nutrient concentration recommendations for fertigation nutrient solution, considering soil available/exchangeable content and simulated crop uptake. Recommended concentrations of P, K, Ca and Mg (in mmol L−1) are calculated from simulated uptake of each nutrient and crop evapotranspiration (ETc). Scenario analyses were conducted for nutrient recommendations of representative cropping cycles of pepper and melon with hypothetical soils of relatively low, medium and high P, K, Ca and Mg availability, obtained from a local soil database. The scenario analyses showed most soils had ample available soil P, and required minimal applications of P. For soils with relatively high levels of available nutrients, DSS recommendations were much lower (20–60%) than farming practice. For soils with a medium supply of available nutrients, the DSS recommendations were generally approximately 60% of farmer practice, except for K in pepper and Ca in muskmelon. For soils that were relatively low in available nutrients, the recommendations were generally similar to or slightly less than farming practice. The crop and greenhouse specific recommendations of VegSyst-DSS v2 can appreciably reduce the application of P, K, Ca and Mg while meeting crop requirements.

Suggested Citation

  • Gallardo, Marisa & Peña-Fleitas, María Teresa & Giménez, Carmen & Padilla, Francisco M. & Thompson, Rodney B., 2023. "Adaptation of VegSyst-DSS for macronutrient recommendations of fertigated, soil-grown, greenhouse vegetable crops," Agricultural Water Management, Elsevier, vol. 278(C).
    • Handle: RePEc:eee:agiwat:v:278:y:2023:i:c:s0378377422005200
    DOI: 10.1016/j.agwat.2022.107973
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    References listed on IDEAS

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    1. Gallardo, M. & Fernández, M.D. & Giménez, C. & Padilla, F.M. & Thompson, R.B., 2016. "Revised VegSyst model to calculate dry matter production, critical N uptake and ETc of several vegetable species grown in Mediterranean greenhouses," Agricultural Systems, Elsevier, vol. 146(C), pages 30-43.
    2. Gallardo, M. & Giménez, C. & Martínez-Gaitán, C. & Stöckle, C.O. & Thompson, R.B. & Granados, M.R., 2011. "Evaluation of the VegSyst model with muskmelon to simulate crop growth, nitrogen uptake and evapotranspiration," Agricultural Water Management, Elsevier, vol. 101(1), pages 107-117.
    3. Thompson, R.B. & Martinez-Gaitan, C. & Gallardo, M. & Gimenez, C. & Fernandez, M.D., 2007. "Identification of irrigation and N management practices that contribute to nitrate leaching loss from an intensive vegetable production system by use of a comprehensive survey," Agricultural Water Management, Elsevier, vol. 89(3), pages 261-274, May.
    4. Gallardo, Marisa & Elia, Antonio & Thompson, Rodney B., 2020. "Decision support systems and models for aiding irrigation and nutrient management of vegetable crops," Agricultural Water Management, Elsevier, vol. 240(C).
    5. Yang, J.M. & Yang, J.Y. & Liu, S. & Hoogenboom, G., 2014. "An evaluation of the statistical methods for testing the performance of crop models with observed data," Agricultural Systems, Elsevier, vol. 127(C), pages 81-89.
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    1. Berrueta, Cecilia & Grasso, Rafael & García, Claudio & Thompson, Rodney B. & Gallardo, Marisa, 2023. "Use of the VegSyst model to simulate seasonal dry matter production, N and K uptake and evapotranspiration in greenhouse soil-grown tomato in Uruguay," Agricultural Water Management, Elsevier, vol. 286(C).

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