02628naa a2200349 a 450000100080000000500110000800800410001902400520006010000130011224501070012526000090023252016440024165000160188565000150190165000150191665000190193165000140195065000270196465000120199165000150200365000100201865000150202865000200204365000130206370000180207670000250209470000220211970000190214170000220216070000260218277300700220821589202024-06-21 2024 bl uuuu u00u1 u #d7 ahttps://doi.org/10.1007/s42770-023-01182-02DOI1 aBINI, D. aParameter evaluation for developing phosphate-solubilizing Bacillus inoculants.h[electronic resource] c2024 aBacterial inoculants have been used in agriculture to improve plant performance. However, laboratory and feld requirements must be completed before a candidate can be employed as an inoculant. Therefore, this study aimed to evaluate the parameters for inoculant formulation and the potential of Bacillus subtilis (B70) and B. pumilus (B32) to improve phosphorus availability in maize (Zea mays L.) crops. In vitro experiments assessed the bacterial ability to solubilize and mineralize phosphate, their adherence to roots, and shelf life in cassava starch (CS), carboxymethyl cellulose (CMC), peat, and activated charcoal (AC) stored at 4 °C and room temperature for 6 months. A feld experiment evaluated the efectiveness of strains to increase the P availability to plants growing with rock phosphate (RP) and a mixture of RP and triple superphosphate (TS) and their contribution to improving maize yield and P accumulation in grains. The B70 was outstanding in solubilizing RP and phytate mineralization and more stable in carriers and storage conditions than B32. However, root adherence was more noticeable in B32. Among carriers, AC was the most efective for preserving viable cell counts, closely similar to those of the initial inoculum of both strains. Maize productivity using the mixture RPTS was similar for B70 and B32. The best combination was B70 with RP, which improved the maize yield (6532 kg ha−1) and P accumulation in grains (15.95 kg ha−1). Our results indicated that the inoculant formulation with AC carrier and B70 is a feasible strategy for improving phosphorus mobilization in the soil and maize productivity aFertilizers aPhosphates aShelf life aSolubilization aBactéria aFertilizante Fosfatado aFosfato aInoculante aMilho aRendimento aSolubilização aZea Mays1 aMATTOS, B. B.1 aFIGUEIREDO, J. E. F.1 aSANTOS, F. C. dos1 aMARRIEL, I. E.1 aSANTOS, C. A. dos1 aOLIVEIRA-PAIVA, C. A. tBrazilian Journal of Microbiologygv. 55, n. 1, p. 737-748, 2024.