MANEJO DE NITROGÊNIO E USO DE SENSOR MULTIESPECTRAL NA CULTURA DO MILHO

Abstract

Corn is one of the main commercialized grains, with Brazil being the third largest producer in the world. However, the management by productivity in the agriculture of fertilization of high importance, being the superior search one of the nutritional factors for the limitation of the production. As a way of maximizing the efficient use of nitrogen, this research aimed to control the ratio of increasing rates of fertilization in the initial stage with the indices of nitrogen production in the initial stage with the indices of nitrogen production, as well as the use of studies of the relationship between the consumption increases, obtained through multispectral cameras embedded in a drone, with the information content in the leaf in the vegetative stage. Regarding the study of N management in maize, there was a positive response between the increase in the use of N parameters and production. Highlighting the average dry mass in area 1 (0.14 kg ha-1), the mass of one thousand grains in area 4 was the one that obtained the average (352.65 g) and the highest final productivity of the crop was in area 5 (8,232.60 kg ha-1) high productivity in relation to the remaining areas. Nitrogen fertilization increased corn productivity and improved the effect of topdressing fertilization in area 2. Great adjustments were also observed between the agricultural indices used in the study and the N in different agricultural areas. In A1, the index that stood out was DI1 ( R² = 94.79%), in A2, the NDVI index has R² (89.46%), in A3, the DI1 index obtained results from the others in the area. The reference indices of optimal contents for the relationship between the crop and the ideal corn cannot be an optimal parameter for the relationship between the crop and the ideal corn.