CULTIVO DE MILHO IRRIGADO COM DIFERENTES DOSES E ÉPOCAS DE APLICAÇÃO DE MOLIBDÊNIO

Abstract

ABSTRACT In the State of Goiás, there are a large number of maize producers, production that can be compromised by several factors, one of them is nutritional deficiency, whose lack of molybdenum micronutrient causes, besides yellow spots on the leaves, a reduction in the size of the maize, which may compromise the production. nitrogen metabolism interfering with corn crop yield. The objective of this study was to evaluate the agronomic performance of corn crop with different molybdenum rates in three application periods. The experiment was carried out at the Federal Institute Goiano Campus Ceres, with a central pivot irrigation system in two consecutive years 2016 and 2017, A randomized block design in a 5x3 factorial scheme was used, with five doses of molybdenum (0, 45, 90, 135 and 180 g ha-1) at three application times (in the sowing furrow, in the sixth fully open leaf and pre-combing). Data were subjected to analysis of variance and compared by the Tukey test at 5% significance level, yielding significant results for yield 6756.96 kg ha-1 and stem diameter in 2016 and 1000 grain mass in 2017, presenting a good performance when fertilization between sowing furrow until the sixth leaf. Regarding the applied doses, it did not obtain significant results, as for the other variables analyzed.