Application of chromium to soils at different rates and oxidation states. II. Influence on uptake of selected nutrients by radish

Metal interactions in soils can be very important in affecting both the composition and yield of plants, as it is the case of chromium (Cr). The objective of this study was to evaluate the effect of Cr in different rates and oxidation states on the uptake of phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), manganese (Mn), iron (Fe), and copper (Cu). A pot experiment was carried out in a greenhouse. Treatments of 0, 10, 50, and 100 mg kg−1 of Cr as CrCl3 and K2Cr2O7 were applied to a Ferric Lixisol (LXf) and a Stagnic Luvisol (LVj) soils. Radish was grown as plant test. The content of P, K, Ca, Mg, Mn, Fe, Cu, and zinc (Zn) was more affected by Cr(VI) application, particularly in roots, being more relevant in LVj soil. The application of 50 mg k−1 of Cr(III) was the limiting doses to the uptake of the elements under the experimental conditions.