HEAVY METALS IN, SOIL FERTILIZED WITH MANURE AND NITROGEN

摘要

During the long-standing field studies, the influence of fertilizing with manure and nitrogen on the content of the soluble forms (in 1 M HC1 dm~(-3)) of heavy metals (Pb, Cd, Ni, Cr) in soil was assessed. Fertilizing with increasing doses of manure (0-80 t ha~(-1)) caused significant but irregular changes in the content of Pb, Cd and Ni. Fertilizing with nitrogen (0-120 kg N ha~(-1)) did not cause significant changes in the content of the assayed forms of metals, especially of Pb, Ni and Cr. In thevast majority of cases, no important relationships were observed between the assayed physical and chemical properties of soil and the content of soluble forms of Pb, Cd, Ni and Cr.