Parâmetros Produtivos de Soja Adubada com Fontes de P e Doses de Organominerais

Abstract

Brazil stands out as one of the main fertilizer consumers in the world, being mostly imported from other countries. However, Brazil has alternative sources of fertilizers. Thus, the objective of this work was to evaluate the agronomic efficiency of the use of fertilizers produced based on reactive rock phosphate, cattle manure and Bacillus spp. Three organomineral fertilizers were evaluated, related to proportions of raw materials, as follows: 1- ORG1: Manure+FNR; 2-ORG2: Manure+FNR+Bacillus, 3-ORG3: Manure+FNR+Bacillus+Clay. The experiment was installed in a block design with 4 replications and a 3 x 4 factorial scheme, with 3 organomineral fertilizers (ORG1, ORG2 and ORG3) and 4 doses of P (0, 20, 40 and 80 kg ha-1 P2O5). The treatments were applied to soybean cultivation. The parameters evaluated were: plant height, height of insertion of the first legume, number of vegetables, number of grains, number of grains per legume, mass of a thousand grains and grain yield in the physiological maturation of soybean. The interaction between sources and doses promoted significant increases in plant height, thousand grain mass and soybean grain yield. The highest soybean yield was observed when ORG2 and ORG3 were used at a dose of 80 kg ha-1 P2O5.