QUALIDADE DA PLANTABILIDADE DO MILHO DOCE EM FUNÇÃO DA VELOCIDADE DE SEMEADURA

Abstract

The sowing process, among the production stages, is considered the most important, requiring maximum efficiency. All stages that occurred during sowing were carried out by seeders; these machines are equipped with mechanisms that aim to deposit the seed in the soil and create a favorable environment for its germination. The main objective of this project was to evaluate the plantability quality of sweet corn as a function of different speeds under two seed metering discs. The study was conducted at IF Goiano –Morrinhos Campus located in the municipality of Morrinhos/GO. The design was a randomized block design in a split-plot arrangement. The crop planted was sweet corn. A John Deere 4x2 TDA tractor and a Netz mechanical seeder were used. The operating speeds used were: V1: 2.43; V2: 3.75; V3: 6.00 km h-1. The following variables were evaluated: average linear distance between seeds, quantity of seeds, and type of seed spacing. The results underwent analysis of variance using the F-test at a 5% probability level. The means were subjected to Tukey's test at a 5% probability level; mentioning that the increasing in the sowing speed affects the percentage of spacing. It´s also said that the lowest operating speed provides better seed distribution during sowing. Additionally mentioned, operating at a speed of 6.00 km h⁻¹ (1,67 m s-1), shows the least variability and points within the control limits.

Keywords: metering disc, no-till system, types of sieves.