Dynamics of phosphorus forms in soils with contrasting texture and mineralogy cultivated with rice

Dynamics of phosphorus forms in soils with contrasting texture and mineralogy cultivated with rice. Two experiments were conducted with the objective of evaluating the influence of Si and P application upon organic and inorganic P forms in two soils solos: classificacao da FAO e Soil Taxonomy (Orthic Quartzarenic Neosol - RQo- and Dystroferric Red Latosol - LVdf), having contrasting texture and mineralogy, before and after rice cultivation. The experimental was in a 4 x 3 factorial scheme, being four P doses and three Si doses. The phosphated fertilization altered the P labile forms, while in the case of low labile P forms the behaviour was dependent upon soil texture and mineralogy. The application of Si was shown to be promising to increase the availability of P for plants in rice.