EFFECT OF PHOSPHATE-SOLUBILIZING BACTERIA ON SOYBEAN YIELD AND ENZYMATIC ACTIVITY IN SANDY SOIL
DOI:
https://doi.org/10.32404/rean.v13i1.9193Keywords:
Soil enzymatic activity, β-glucosidase, Glycine max (L.) Merrill, Grain yield, Soil healthAbstract
Soybean [Glycine max (L.) Merrill] is Brazil leading agricultural commodity, positioning the country as the world largest crop producer. Soybean yield is determined by the combined contribution of several primary and secondary components, all directly influenced by adequate plant nutrition. Among essential nutrients, phosphorus (P) stands out as one of the most limiting for plant development, and its deficiency compromises plant physiology, negatively affecting yield performance. In this context, research has shown promising results regarding phosphate solubilization by microorganisms such as Bacillus subtilis, B. megaterium, and Pseudomonas fluorescens, applied individually or in combination. This study evaluated soil enzymatic activity and soybean yield in response to seed-applied microbial inoculants. The experiment was conducted during the 2023/2024 growing season at IFMS Nova Andradina, using two soybean cultivars in a randomized complete block design (RCBD), arranged in a 2×6 factorial scheme with five replications. The seed treatments included: a control (no inoculation); inoculation with 100 mL ha-1 of Bioma Brady; 100 mL h-1 of BiomaPhos®; 100 mL ha-1 of Nod Phos®; 300 mL h-1 of Biomaphos®; and 300 mL ha-1 of Nod Phos®. The results confirmed that seed inoculation and/or co-inoculation with phosphate-solubilizing microorganisms (PSM) and biological nitrogen-fixing (BNF) agents enhanced grain yield in both soybean genotypes compared to the non-inoculated control. Additionally, the use of BiomaPhos® and Nod Phos® increased soil enzymatic activity.
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