Respostas da produtividade de berinjela sob condições climáticas no semiárido do nordeste.

Abstract

This study determined the crop coefficient, crop evapotranspiration through soil water balance, water efficiency and use, productivity, and validation of the AquaCrop model for the eggplant crop “Ciça” (Solanum melogena L.). The experiment was carried out in two different climatic seasons, rainy and dry, in the region in 2022, distributed in two blocks, to determine the effects of rainfed cultivation and the effect of water stress with inspection slides for the treatments of 100% (T1), 80% (T2), 60% (T3), 40% (T4) and 20% (T5) of reference evapotranspiration (ETo) for daily water configuration via climate. The simulations of the AquaCrop model for the safety treatments were calibrated and validated, for the conservative and non-conservative parameters. The model performance was evaluated using statistical indicators: root mean square error (RMSE), normalized root mean square error (RMSEN), Nash and Stucliffe efficiency (EF), Willmontt's concordance index (d) and forecast error (Pe). The values found prove the effectiveness of the model. Given the results, the eggplant crop grown in dryland conditions proved to be economically viable and for irrigated planting the recommended water depth for eggplant cultivation under the agrometeorological conditions of the experiment was 100% of ETo; however, eggplant cultivation subjected to water deficit showed efficiency for the treatment of 80% of ETo.