Temporal evolution of copper distribution in soil fractions, influence of soil pH and organic carbon level on copper distribution

摘要

The present paper deals with the temporal evolution, over 6 years, of copper distribution in soil fractions using a sequential extraction procedure isolating five soil fractions which are operationally defined but commonly identified as : F1= exchangeable metals, F2 = metals bound to organic matter, F3=metals bound to manganese oxides, F4=metals bound to iron oxides and F5=the residual fraction. The soil studied was a silty agricultural soil whose four plots were deliberately enriched with copper sulphate in October 1992 and one of them was also enriched with organic matter, another one with lime and the last one with both organic matter and lime.