USO DE FERTILIZANTES ORGANOMINERAL E MINERAL PARA FORNECIMENTO DE FÓSFORO A CULTURA DE SOJA

Abstract

Soybean (Glycine max L.) leads Brazilian agriculture, being one of the most cultivated plants in the world, and to achieve high yields it is necessary to meet all the needs of the crop, related to the adoption of different methods of fertilizer application. The present work has as objective to evaluate the agronomic characteristics of the development of the soybean crop with the use of different sources of phosphate fertilizer, being the organomineral and mineral. The design used was randomized blocks in a 2x5 factorial scheme, two organomineral and mineral NPK sources (2-12-12 and 4-30-10) and five doses of P2O5 (0, 15, 30, 45 and 60 kg ha -1) with four repetitions. N and K were adjusted to the same doses in all plots with urea and potassium chloride sources. The cultivar Voraz was used. Data were submitted to analysis of variance and means compared by Tukey's test at a 5% significance level. And regression analysis as a function of doses. The analyzes were carried out with the aid of the statistical software R. The two sources used provide adequate P supply for the plants, according to the dose calculated by the regression resolution, the dose of 30 kg ha-1 of P presented a greater number of grains per pod and the dose of 45kg ha-1 of P via phosphate fertilizer gives the highest grain yield for soybean, resulting in 27 more bags compared to the control.