Leaching of Metals from a Spruce Forest Soil as Influenced by Experimental Acidification

摘要: Acidified (H2SO4+HNO3, 3:1) throughfall waters (pH 3.16 and 3.40 as volume weighted means or control (untreated water, pH 3.72) were applied for 3.5 yr by an automatic irrigation device to lysimeters containing podzolized spruce forest soils of 0–5, 0–15 0–35 cm soil depth. The total the leachates was measured together with their content DOC, Na, K, Ca, Mg, Fe, Mn, Al, Cu, Zn, Cd Pb initial amounts metals H in soil. main part H+ added retained within Concentrations fluxes Zn significantly increased addition acidified waters; K less affected. As a consequence lowered flux DOC A horizon acid input increased, also decreased. mobility these shown be regulated mainly formation water-soluble organic compounds rather than directly variations. Compared control, additional annual loss Mg from profile most treatment c. 10% currently exchangeable amount.