DESEMPENHO PRODUTIVO DE HÍBRIDOS DE MILHO SUBMETIDOS À APLICAÇÃO FOLIAR DE MAGNÉSIO

Abstract

The purpose of this study was to evaluate the agronomic performance of maize hybrids in foliar application of magnesium doses. The experiment was conducted out at Fazenda Córrego do Oriente in Nova Glória - GO under no-tillage. The experimental design adopted was the randomized blocks in a 5x2 factorial scheme, five magnesium doses (0; 0.25; 0.50; 0.75 and 1.0 kg ha-1) and two corn hybrids (P 4285VYHR and MG 580PWU) with four replications. The variables analyzed were: plant height (HP), in meters; height of the first corn cob (HFCC), in meters; methodology by Demetrius et al. (2008), corn cob diameter (CCD), in millimeters; length (LCC) of the corn cob, measured in millimeters with a digital caliper; grain row number (GRN); number of grains per row (NG/R); thousand grain mass (M1000) in grams; productivity (PROD). Data from all variables were subjected to analysis of variance and means compared by Tukey test with a significance level of 5%. There was no significant interaction between doses and hybrids, so the analyzes were realized out individually. There was no significant difference in doses for any of the variables. For the variables AP, CE, M1000 and PROD, the hybrid P 4285VYHR was superior, with higher means.