DESEMPENHO AGRONÔMICO DA SOJA SOB O EFEITO DA ADUBAÇÃO ORGANOMINERAL

Abstract

A possibility of diversifying phosphate sources for agriculture is the use of organomineral fertilizers that contain appreciable P levels, in addition, they are an alternative for fertilization to be carried out effectively, without compromising the growth and development of the culture and the environment. The objective was to evaluate the growth, grain yield and oil content of soybean (variety DM 68i69IPRO) fertilized with organomineral in Red Oxisol of Cerrado with different levels of P availability. The experiment was carried out under field conditions, in the municipality of Rio Verde-GO. The soil in the experimental area is classified as a medium texture Red Oxisol. The experimental design used was in randomized blocks, analyzed in a 2 × 5 factorial scheme, with four replications. The treatments consisted of two phosphorus sources (organomineral fertilizer and triple superphosphate) and five doses. The same experiment was carried out in two experimental areas: for an area with phosphorus restriction and for an area with corrected phosphorus contents. The soybean variety used was DM 68i69IPRO. The variables evaluated were plant height, shoot dry mass, leaf phosphorus content, grain yield and oil content. The application of organomineral fertilizer (06-22-01 and 05-16-02) in soybean cultivated in Red Oxisol of Cerrado with phosphorus restriction and with corrected phosphorus levels, can be recommended from the dose of 50 kg ha-1 by P.