Resposta da aveia a adubação nitrogenada via solo e foliar

Abstract

In the southernmost states of Brazil, during the winter period there is a pasture gap. It is a time of low temperatures and frost formations. With this in mind, the crop-livestock integration system is used, which makes it possible to plant grains in the summer and pastures adapted to cold in the winter. To supply the nutrition needs of pastures, the demand for foliar fertilizers, which are liquid fertilizers to be applied on the surface of the plant, is growing in industrial production and commerce. This project sought to evaluate the use of liquid foliar nitrogen fertilizers, on absorption routes (soil and foliar), and observe through the results what they add nutritionally to the plant, because they are absorbed by very different routes. The experiment was conducted in a rural property in the municipality of Palmitos - SC, Brazil. The experimental design was in block format, with four (4) treatments: control, foliar, soil and soil/foliar. Each plot was repeated five (5) times, for a total of twenty (20) 12.5m² plots. Total area of 250m². After two cuts, the samples were taken for drying in an air circulation oven at a temperature of 50°C for 72 hours. Afterwards, the samples were ground and digested for the estimation of nitrogen, phosphorus and potassium in the aerial part. The results were submitted to variance analysis and compared among themselves, using the Tunkey test, at 5% probability, and evaluated by the Sisvar statistical program. Thus, we conclude that the white oat crop responds better when it has a combination of the forms of absorption, thus increasing the contents of the three main elements in its leaves.