DOSES DE FÓSFORO NA CULTURA DA SOJA EM CONDIÇÕES DE CERRADO

Abstract

Soybean (Glycine max (L.) Merrill) is a highly relevant crop in the world, with high production potential, where its chemical composition and nutritional value are of extreme social and economic importance. Among the fundamental nutrients for the vegetative and reproductive development of crops, phosphorus (P) is a nutrient widely studied, mainly due to its essential importance in production systems. Thus, the objective was to evaluate the effect of doses of triple superphosphate on corrected and uncorrected soil on the residual effect of foliar P, oil content and productivity in the 2020/2021 soybean crop. The experiment was carried out on an agricultural property in the municipality of Rio Verde - GO, in a randomized block design in a 2x5 factorial scheme with two conditions (corrected phosphorus and phosphorus restriction) and five doses (0, 50, 100, 150 and 200 kg ha-1 of P2O5). Plant height, shoot dry mass, productivity, oil content, phosphorus content (leaf and soil) were evaluated. To evaluate the effects of treatments, analysis of variance and Tukey's test were performed, and when significant, the regression equation was adjusted. Phosphate fertilization showed a positive influence on growth, development and increase in productivity in the soybean crop and for the increase of doses there was a gain in biomass.