$application of organomineral and mineral nitrogenate fertilizer in maize crop, in coverage, on soils of different textures

The use of organomineral can improve the efficiency of nutrients mainly of nitrogen and, therefore, reduce the costs with fertilizer application. The application of organominerals in addition to providing nutrition improves soil quality. This study aimed to evaluate the effects of organomineral nitrogen fertilizer compared to mineral fertilizer on different soil textures in corn. Two trials were conducted in the city of Uberlândia-MG: one located near the BR 452 highway, km 141, at coordinate 18°55'28’’ S 48°09’36’’ W, clay soil. The other, at km 640 of BR 365, at coordinate 18°54'05’’ S 48°25’20’’ W, sandy soil. The design was in a 2 x 5 + 2 factorial scheme in randomized blocks with four replications, two application times, five doses of pelleted nitrogen organomineral fertilizer (40, 60, 80, 100 and 120% of the recommended nitrogen dose for the corn) and two additional ones with 100% of the mineral nitrogen recommendation. Regarding the application time, the application subdivision in V2 (50%) + V4 (50%) presented the best increments for column and stalk diameter, stalk length and number of grains per row. Thus, the results demonstrated, with the exceptions of the nitrogen and potassium leaf content and dry mass in the sandy texture and the stalk diameter in the clay texture, there was no statistical difference between the doses of organomineral nitrogen as they did not differ from the additional mineral. Thus, it was indicated that organomineral nitrogen is just as efficient in maize culture as the source of mineral nitrogen.