Produtividade de milho em função de épocas de dessecação de aveia preta e mecanismos sulcadores

Abstract

The main objective of this work was to evaluate corn production under different periods of black oat desiccation, and two different types of ridger. The experiment was conducted at the Universidade Tecnológica Federal do Paraná experimental area, campus Pato Branco, in a Nitossolo Vermelho distroférrico típico. The treatments were composed by four periods of black oat desiccation (0, 15, 30 and 45 days before seeding), and two different types of ridger (double disc and chisel plow) on a no-till seeder-fertilizer machine. The evaluations made were: oat dry mass, final stand of corn plants, plant height, height of the first corn cob, stem diameter, number of grain rows, number of grains per row, thousand grains mass, and crop productivity. The periods of desiccation significantly influenced in the height of the first corn cob and in the stem diameter. The furrowing mechanisms significantly influenced on final stand of corn plants, on the number of grain rows and thousand grain mass. No significant influence was found about plant height, number of grains per row and crop productivity.