Modelling nitrogen, phosphorus, potassium, calcium and magnesium uptake, and uptake concentration of greenhouse tomato with the VegSyst model
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Gallardo Pino, Luisa; Cuartero, Jesús; Andújar de la Torre, Llanas; Padilla Ruiz, Francisco Manuel; Segura, María Luz; [et al.]Fecha
2020-12-17Resumen
The existing version of the VegSyst model (V2) simulates daily dry matter production (DMP), crop evapotranspiration (ETc) and crop N uptake of tomato and other vegetable crops grown in greenhouse in SE Spain. In this study with greenhouse tomato, (i) the VegSyst model was adapted to simulate daily values of seasonal (i.e. throughout the crop) uptake of K, P, Ca and Mg, (ii) the simulation of seasonal N, K, P, Ca and Mg uptake was validated, and (iii) the simulation of seasonal uptake concentration (UC) of N, K, P, Ca and Mg was validated. For K, P, Ca and Mg, dilution curves (i.e. relationship of crop content of the nutrient (%) to DMP) were obtained from pooled data of six treatments from two greenhouse tomato crops. These relationships were all described by power equations with R2 values of 0.72–0.92 for all nutrients, except Mg that had a R2 of 0.40. For the simulation of tomato crop N uptake, the dilution curve previously used in V2 was replaced by the critical N curve for tomato o...
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Solanum lycopersicum
uptake concentration
fertigation
modeling
macronutrients
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