SOLUBILIZADORES DE FOSFATO EM UM SOLO ARENOSO NO CULTIVO DA SOJA DE PRIMEIRA SAFRA

Abstract

PHOSPHATE SOLUBILIZERS IN SANDY SOIL IN FIRST CROP SOYBEAN CULTIVATION Abstract Phosphorus (P) is an essential nutrient for plants and requires adequate management for its best use, especially in sandy soils. There is great interest in research into microorganisms that can improve the performance of P in the soil, such as phosphorus solubilizers. phosphate. Therefore, the objective of this study was to evaluate the use of phosphate solubilizers, in different associations in the planting furrow, in the production components and in the productivity of first-crop soybeans in a sandy soil. The experiment was carried out in the municipality of Sonora - MS, in a commercial area with a first harvest, in Quartzarenic Neosol. The experimental design was in randomized blocks (DBC) with five treatments and five replications, totaling 25 plots. The treatments were: 1) Control - no treatment in the sowing furrow; 2) Farm Standard (PF): Azospirillum brasilense + Bradyrhizobium japonicum + Bacillus methylotrophicus + Trichoderma asperellum; 3) PF + Pseudomonas fluorescens (PF + Pseudomonas); 4) PF + organomineral biostimulant (PF + Organic) and 5) PF + mineral fertilizer (PF+ mineral), all applied in the sowing furrow. The PF + Pseudomonas and PF + mineral fertilizer treatments provided greater height, number of pods per plant and number of grains per soybean pod. The highest soybean productivity was provided by the PF treatment, being 28.8% higher than the average of PF treatments with other inoculant combinations. Positive effects of combinations of phosphate solubilizers were verified in relation to treatment without the use of microorganisms. Keywords: plant growth promoters; biological fixation; microorganisms, Glycine max (L) Merrill.