Simulating the accumulation of mineral nutrients by crops: An allometric proposal for fertigation
Resumen
A simulation of the accumulation of mineral nutrients in crops by an allometric model dependent on thermal time (non-linear) is proposed as a simple and robust method to calculate and schedule crops fertigation. Crop accumulation of nutrients was calculated by the allometric relation between nutrients and biomass, coupled to a biomass function dependent on a biological age. Thus, a curve for nutrient accumulation can be characterized with six specific parameters, including the allometric exponent. Three data sets were employed to verify simulations. Fit parameters were obtained, being R2 > 0.9 for four of the five main macronutrients. When verifying the simulation ability, RMSE were: nitrogen (N) = 0.1355; phosphorus (P) = 0.1214; potassium (K) = 0.1179; calcium (Ca) = 0.0991 and magnesium (Mg) = 0.0821 (relative data). The proposed allometric method describes the nutrients accumulation with remarkable simplicity and flexibility, while the verification of the model was done on three differing experimental conditions simultaneously.
Fuente
Journal of Plant Nutrition, 36(9), 1327-1343Link de Acceso
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dx.doi.org/10.1080/01904167.2013.790426Colecciones
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