Phosphate solubilizing microorganismes prospection in the development of biochar based products applied in a vineyard production system

The microorganisms isolated were obtained from the rhizospheric soil of Vitis vinifera L., in the municipality of Garanhuns-PE. Serial dilutions were performed, inoculated in triplicate, in petri dishes with NBRIP medium. These were incubated for 72 h at 28 °C, and microorganisms with a halo of solubilization around the colonies were identified as phosphate solubilizers. Of the 23 isolates, 77% were able to solubilize tricalcium phosphate. 91.7% were gram-negative and 8.7% gram-positive. The biochars were obtained from viticulture residues (fermentation and pruning of the grape) presented a yield of 55.6% and 48.33%, having a good reuse, proposing to be viable for the producers.