ALUMINUM CHEMISTRY OF THE ROOT-ZONE OF FOREST SOIL AFFECTED BY ACID DEPOSITION AT THE LYSINA CATCHMENT, CZECH-REPUBLIC

The aluminium chemistry of soil solution in the root zone was evaluated for a spruce (Picea abies) forest ecosystem in the Lysina catchment underlain by base-poor granitic bedrock and impacted by acid deposition. The principal H+-buffering process in these soils is not the release of aluminium ions, although pH of soil solution is very low. The upper soil horizons are depleted of aluminium and as a consequence, the Ca/Al ratio of the soil solution is relatively high. The soil water is generally undersaturated with respect to gibbsite, aluminium-silicates and jurbanite.