SEMEADURA DE MILHO DOCE EM DIFERENTES CONFIGURAÇÕES DE OPERAÇÃO

Abstract

The propagation process of sweet corn (Zea mays L. saccharata group) is carried out by sowing, having several parameters to be evaluated during this operation so that there is a good quality, highlighting among them: the speed of sowing, dosage of graphite, plant uniformity (stand), plant spacing and seed depth. Given the above, the objective of this research was to analyze three different operating speeds, influences on the dose of graphite, for an evaluation of the effects on plantability in sweet corn. The study was carried out at the Instituto Federal Goiano – Campus Morrinhos, located in the municipality of Morrinhos/GO. To carry out the sowing, a John Deere 4x2 TDA tractor, with a nominal power of 78 kW (106 hp) and a seeder, Netz brand, model PDN 6000, were used, the area was part of a central pivot of 18 ha, and the crop used was sweet corn (Zea mays L. saccharata group). Three operating speeds and two/three amounts of graphite used in mechanical seeders were evaluated. The results were analyzed through analysis of variance (ANOVA) by the "F" test at 5% probability and, subsequently, the means of the variables in the different treatments were analyzed through the Tukey test at 5%. The software used was Assistat version 7.7.Concluding that the highest seeding uniformity is at a speed of 5.0 km h-1, graphite dose of 12 g kg-1 provided the highest seeding uniformity. Higher operating speeds and lower doses of graphite provided a greater number of flaws or double germination.