Adubação organomineral de cobertura de milho em segunda safra e componentes de rendimento do milho

Abstract

One of the main bottlenecks in plant production is the adequate availability of nutrients for plants. In general, this availability is made using mineral fertilizers. As an alternative to reduce costs, organic materials can be added to these fertilizers, also having the benefit of being environmentally friendly by allocating waste produced by other sectors and by adding organic matter to the soil. Therefore, the objective of this work was to evaluate, under field conditions, the effect of the application of different doses of organomineral fertilizer applied in cover on the reproductive morphological characters and the productivity of the corn culture. The experiment was conducted in an experimental area of the company Vigor Fertilizantes, in the city of Uberlândia - Minas Gerais. The design was randomized blocks (DBC) with seven treatments and four repetitions, with the treatments being variable according to the fertilization of cover, carried out in stages V4 and V8: 1. Control without application; 2. Control with fertilization of mineral cover; 3. Organomineral 80 kg ha-1; 4. Organomineral 120 kg ha-1; 5. Organomineral 160 kg ha-1; 6. Organomineral 200 kg ha-1; 7. Organomineral 240 kg ha-1. The corn hybrid used was the Supreme Viptera (Syngenta). Each plot was made up of six rows of plants 5 meters long, with 0.5m spacing between lines, totaling 15m² each plot, and the evaluations were made on both lines, discarding the borders. The parameters evaluated were: plant height at harvest, height of ear insertion at harvest, ear mass, number of rows of grains on the ear, number of grains per row and mass of a thousand grains. It is concluded that the organomineral or mineral fertilization in cover does not influence the reproductive morphological characteristics and productivity of the corn.