AVALIAÇÃO DO RENDIMENTO PARA Glycine max EM FUNÇÃO DA ADUBAÇÃO FOSFATADA

Abstract

ABSTRACT - The present study evaluated the effect of triple superphosphate doses on the yield of soybean genotypes under Cerrado conditions. The study was conducted in Campo Alegre de Goiás, GO, Brazil. A randomized block design was used, in a 4x5 factorial scheme, corresponding to four soybean genotypes (AS3680, NA5909, NA7337 and TMG1180), in five phosphorus levels (0, 100, 200, 300 and 400 kg ha-1 of P2O5) using Triple Superphosphate (41% P2O5 and 9% Ca). The variables related to yield were evaluated at 146 days after sowing. The characters with the greatest contribution to the increase in yield levels were the weight of a thousand grains, plant and legume stand per plant. Using triple superphosphate as a phosphate source, it is recommended to cultivate the genotype AS3680, which showed the highest yield (91.57 sc ha-1) with a dose of 95.65 kg of P2O5 ha-1, corresponding to increases of 21.57% in yield.