Consumo hídrico e calibração/validação do modelo AquaCrop para a cultura do coentro submetido à irrigação localizada.

Abstract

The main objective of this work was to determine the water consumption and to perform the calibration of the AquaCrop model for the coriander culture with the purpose of simulating the productivity for the semi-arid region of the Nordestes do Brasil. The experiment was carried out in the experimental area of the Federal University of Campina Grande, EstAgro, located in the city of Campina Grande-PB, between September and October 2017, using the "Tabocas" coriander culture. The experimental design was completely randomized, with three treatments that consisted of 100, 75 and 50% of replenishment of the water requirement of the culture with 8 replicates each, totaling 24 experimental plots. It was used the data obtained in the treatment of 100% of replacement for calibration of the AquaCrop model and the one for the validation was through the comparison of the values found by the model with those observed in the field The average values of ETc and Kc were 2.02 mm / day and 0.40, respectively. Finally, the performance of AquaCrop evaluated on the basis of parameters used in the study indicated low precision of the model, from a statistical point of view, due to the quality of the data used in the calibration.