Comportamento do cobre em solos cultivados com cana de acúcar

Abstract

The copper added to the soils was preferentially adsrorbed by the pH dependent charges, wich in the Sao Paulo State soils are mainly due to organic matter constituents. A fraction of the added Cu ions forms very stable complexes or chelates, and the recovery of the Cu adsorbed with 0,05 N HCL solutions was not quantitative in most cases. Therefore a high Cu concentration was observed in the soil equilibrium solution, wich being mobile can contribute, effectively to the nutrition of the plant.