EFEITO DA ADUBAÇÃO NITROGENADA ASSOCIADA AO GEL HIDRORETENTOR NO TOMATEIRO DE MESA

Abstract

The tomato (Solanum lycopersicum L.) is the main olive cultivated in Brazil; And the second most important on the world stage. The management of the crop is important for the productivity of the tomato, for this a balanced fertilization and the use of new technologies, such as the use of the hydrogel, a water retention polymer, can propitiate this gain of production. The objective of this work was to study the different doses of nitrogen associated with the use of hydroretting gel in the production and quality of the fruit of the Santy hybrid tomato from the company Sakata Seed. The experimental design was done in split-plot, randomized blocks (DBC), in a 2x4 factorial scheme, with two applications (with and without hydroretting gel) and four nitrogen fertilizations (0, 180, 360 and 540 kg ha-1). The ammoniacal fertilizer used in the experiment was urea. Quantitative and qualitative parameters were evaluated. The interaction between the use of hydrogel at different doses of nitrogen did not present significant effects for any of the analyzed variables. However, with the use of the hydroretting polymer, an increase in the final stem diameter, green matter of lateral shoots and texture can be observed. The increase of the nitrogen doses increased a higher absolute growth rate for plant height, stem diameter, green matter and dry matter of the lateral shoots, chlorophylls of the region (basal, median and apical), number of fruits, average fruit production, Productivity per hectare.