Biossolubilização de pó de rocha rico em silicato pelos fungos Trichoderma sp. e Paecilomyces sp.

Abstract

Silicon is a beneficial nutrient for plants and an unconventional alternative to its alternative has not been its use of silica residue, but that directly applies to availability. The use of fungi isolated from soil can promote the solubilization and availability of silicon from this material. Therefore, the objective was to evaluate the effect of fungi isolated from soil on the solubilization of silicates present in basaltic rock objects. A series of Trichoderma and Paecilomyces fungi, in vitro solubilization tests and a soil incubation test were carried out. They were evaluated, in general, as variables pHH20, pHCaCl2, EC, [P] and [Si]. In vitro, the highest value obtained in relation to pH was in the treatment of rock powder in water. For EC and [P], the highest were rock dust vs fungi association. For [Si], the largest were with the addition of associated rock dust, especially Paecilomyces. It was also observed that there is a positive certainty between pH and [Si] indicating that the lower the pH in solution, the higher it is, and positive fundamentals between CE, [P] and [Si]. In incubation, it was observed an increase in the addition of basalt and a reduction in the pH of the associated fungi, in addition to an increase in pH and a reduction in EC. Associated with fungi, it is known that rock dust can be an important Trichoderma and Paecilomyces remineralizer due to nutrients and phosphorus.