INTERACTION OF NITROGEN AND ZINC ON MAIZE PRODUCTION

Abstract

A corn crop is responsible for increasing the nutritional management function and for that reason, the work aimed to evaluate the influence of nitrogen (N) and zinc (Zn) in the production of the crop. The experiment was conducted in pots in the experimental area, in the city of Bebedouro. It was installed in random blocks, consisting of twenty-seven plots. The controls correspond to combinations of three doses of Zn (2, 8 and 16 kg ha^-1), applied in a localized seeding manner and three of N (0, 120 and 240 kg ha^-1) applied in partial sowing and in coverage. The productive characteristics were evaluated: number of rows and grains per ear and yield. The interaction between N and Zn provided by the use of 120 kg ha^-1 of N and 2 kg ha^-1 of Zn resulted in plants with higher yield (30.96 t ha^-1). The application of N did not influence the number of rows per spike, while increasing doses of Zn did not provide better performance for this production component. The use of the highest dose of Zn (16 kg ha-1) had a negative influence on the amount of grains per ear, while the interaction between the doses of 120 kg ha-1 of N and 2 kg ha-1 of Zn represented the treatment. more efficient in this analysis. Doses greater than 2 kg ha-1 of Zn interact negatively together with doses of 0 and 120 kg ha-1 of N, for the variables grains per ear and productivity.