Déficit hídrico controlado no período da indução floral da mangueira ‘palmer’ no Submédio do Vale do São Francisco

Abstract

Studies related to the amount of water to be applied during the water deficit for floral induction of the mango are still scarce, for this reason, the doubt about which blade should be applied to the soil is recurrent. Thus, the objective was to improve the management of irrigation with water deficit in the period of floral induction of the 'Palmer' mango tree in the Submédio São Francisco region. The experiment was carried out at Yoshida Farm, in Petrolina - PE. The experimental design was in randomized blocks, using four irrigation depths (25; 40; 55 and 70% of crop Evapotranspiration - ETc), with five replications. For two cultivation cycles (2019 and 2020). Variables analyzed: flowering, number of fruits, average weight, productivity and qualitative characteristics of the fruits (content of soluble solids, titratable acidity, firmness, pH, fruit length, ventral diameter, transversal diameter, skin color (luminosity, chromaticity and color angle), gas exchange (photosynthesis, stomatal conductance, transpiration and leaf temperature), leaf water potential and chlorophyll content. The main results were that the water deficit of 25% of ETc, during the floral induction of 'Palmer' mango trees promoted an increase in the number of fruits per plant, favoring an increase in crop productivity, the 70% ETc water depths showed the best physiological characteristics, the leaf water potential increased with the increase of irrigation depths.