Fig. 1
Soluble P (a), pH (b), and acid phosphatase activity (c) in the liquid NBRIP medium containing biochar enriched with Bayóvar rock phosphate (100 mg L−1 of P) 10 days after inoculation of phosphate-solubilizing bacteria. Control, uninoculated treatment; ρNP, ρara-nitrophenyl phosphate. Means followed by the same letter do not differ by the Scott–Knott test (p < 0.05). Means and standard deviations of six replications