This research was conducted from May to September, 1995, in order to evaluate liming criteria for rice plants on flooded soils of Minas Gerais State, Brazil. The effects of increasing CaCO3 + MgCO3 dosis on dry matter production were evaluated in a greenhouse pot trial. The experimental matrix was a complete factorial with ten lowland soils and five levels of liming. The soil characteristics which significantly affected the lime levels recommended were: titrable acidity at pH 7,0 (H + Al), base saturation (V), content of organic carbon (C) and contents of calcium plus magnesium (Ca + Mg). On the other hand, the contents of reducible Fe and Mn did not significantly influence the liming recommendation. The liming method for increasing base saturation to 40% was more effective in determining the recommended doses for attaining a dry matter production of 90% of maximum yields.
flooded soils; liming recommendation; iron toxicity