Effects of microbial bioeffectors and P amendements on P forms in a maize cropped soil as evaluated by 31 P–NMR spectroscopy

Background and aims Identification of organic P species is important to understand their origin, turnover in soils and their effects on soil fertility. Attention has been recently devoted to microbial inocula, referred to as Bioeffectors, that are capable to increase P bioavailability and plant uptake. Nevertheless, little is known on the effect of Bioeffectors on soil P forms and their dynamics in agricultural soils upon different P fertilization.