QUALIDADES PÓS-COLHEITA DE FRUTOS DE TOMATEIRO INDUSTRIAL CULTIVADOS COM FONTES DE ADUBAÇÃO FOSFATADA E IRRIGAÇÕES LOCALIZADAS

Abstract

The greater efficacy on fertilization and irrigation can bring several benefits for tomato production at Goias' agribusiness. Therefore, the goal of our experiment was evaluate the effect of phosphate fertilizer sources and different irrigation systems in quality of industrial tomato fruits. The experiment was performed in horticulture experimental area at Federal Goiano Institute - Campus Morrinhos - GO, under randomized block design with four replications in 3x5 scheme (3 irrigation system: surface drip; buried drip and micro-sprinkler and 5 phosphate fertilizer: 100% de Yoorin; 75% Yoorin e 25% Superfosfato Triplo; 50% Yoorin e 50% Superfosfato Triplo; 25% Yoorin e 75% Superfosfato Triplo; e 100% Superfosfato Triplo). The tomatoes were harvested at 135 days after transplanting seedlings, where 30 fruits from each subplot were selected at random to evaluate firmness, density, longitudinal diameter, transverse diameter of the fruits, total soluble solids, pH and total acidity fruit pulp titratable. The data was submitted to analysis of variance, Fisher's test (p<0.05) and medias were compared by the Scott-Knott test (5% probability). The use of triple superphosphate at planting provided better quality of the fruits of the hybrid BRS Sena. Irrigation with microaspertion + fertilization with triple superphosphate provided greater firmness of the tomato fruits. Microaspersion irrigation brings greater firmness, higher pH and less longitudinal length than drip. For the buried and superficial drip system, satisfactory results were not obtained in the quality of the tomato fruits in the studied conditions.