ADUBAÇÃO FOSFATADA EM TOMATEIRO INDUSTRIAL IRRIGADO POR SISTEMA DE IRRIGAÇÃO LOCALIZADA

Abstract

The tomato production chain is important in the context of the Goiano agribusiness, where there is an increasing water demand, a need for greater efficiency of fertilization and water productivity. The present work had the objective of evaluating different forms of phosphate fertilization in industrial tomato irrigated by localized irrigation systems. The experimental design was in randomized blocks, in plots subdivided in the 3x5 scheme, with four replications. In the plots, three irrigation systems were used: surface drip; buried drip and micro sprinkler. Both applied the same irrigation levels. In the subplots, five combinations of the phosphate fertilization were used: T1 = 100% of Yoorin; T2 = 100% Triple Superphosphate; T3 = 75% Yoorin and 25% Triple Superphosphate; T4 = 50% Yoorin and 50% Triple Superphosphate; and T5 = 25% Yoorin and 75% Triple Superphosphate, being applied two days before transplanting the seedlings. At the time of harvest, the yield of green fruits was evaluated; mature; rotten; total productivity; Percentage of green, ripe and rotten fruits. The use of Yoorin with Triple Superphosphate proved to be beneficial for the production of industrial tomatoes. Regardless of the irrigation system, phosphate fertilization with Triple Superphosphate alone did not prove to be advantageous for BRS Sena tomato production. In general, the lowest yields of the tomato occurred with the drip irrigation system. The micro sprinkler irrigation system provides a higher incidence of mature fruits. Micro sprinkler irrigation showed higher tomato productivity, when phosphate fertilization was performed with 100% Yoorin. The association of Yoorin with Triple Superphosphate obtained the highest yields using surface drip.