ZINC AND COPPER FRACTIONS IN SOILS CONTAMINATEDWITH NICKEL

摘要

Soil subject to a three-year pot experiment was analyzed; in which the following factors were considered: (i) soil contamination with nickel (0, 75, 150 and 225 mg Ni kg"1 of soil); (ii) liming (0 Ca and Ca in a dose calculated according to 1 Hh of soil); (iii) organic fertilization (with no organic fertilization, rye straw and brown coal from the Turów coalmine). The test plant was orchardgrass, which was harvested in the amount of four cuts each year of the experiment. The copper and zinc fractions were assessed using the BCR method, whereas the pH was calculated using the potentiometer method. The total content of copper and zinc in the analyzed soil did not exceed the values of the geochemical background of the soils of Poland. No impact of thevaried content of nickel in the soil on the total content and distribution of Cu and Zn was found in the investigated fractions. Liming caused an increase in the total content of zinc in the analyzed soil and a decrease in the content of Cu and Zn in the F1 fraction. The straw and brown coal caused an increase in the content of both metals in the soil in the F3 fraction.