Species of Al ions in soils of North Bohemian mountains as related to selected soil characteristics
1999
Boruvka, L. | Kozak, J. | Drabek, O. (Ceska Zemedelska Univ., Prague-Suchdol (Czech Republic))
In soil samples collected from 49 soil profiles situated in the mountainous region on both forest and adjacent grassland sites, content of labile forms of Al and total content of Al in 1 M KCl extract, and Al extractable with 0.05 M Na4P2O7 were determined as well as basic soil characteristics. The contents of determined Al forms were relatively high, especially in the forest soils. As it was revealed in the surface horizons, these contents were controlled mainly by soil reaction. In the subsurface horizons they were controlled also by the content of organic carbon extractable with 0.05 M Na4P2O7 (EOC). EOC is a limiting factor for organically bound Al forms if it is not abundant as it was the case of surface horizons of forest soils. Al determined in the Na4P2O7 extract contained probably also a considerable amount of inorganic Al forms, especially in the soils where sorption sites of soil organic matter were limited.
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