Laboratory assay of aluminium transport through intact soil sample under controlled conditions
2010
Batysta, M.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Pedologie a Ochrany Pudy | Boruvka, L.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Pedologie a Ochrany Pudy | Drabek, O.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Pedologie a Ochrany Pudy | Tejnecky, V.,Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Pedologie a Ochrany Pudy | Sebek, O.,Karlova Univ., Prague (Czech Republic). Laboratore Geologickych Ustavu
Aluminium mobilisation in the forest soils is a serious problem due to the soil acidification. The rate and magnitude of leaching of Al and other elements and compounds from soils can be examined by means of percolation experiments. Al elutriation was studied under laboratory conditions using undisturbed samples of forest topsoil from the Palicnik area in the Jizera Mountains (Czech Republic), which originated under two different vegetation covers: Fagus sylvatica and Picea abies. Ponding infiltration was performed using three subsequently applied solutions. KCl solution was used to simulate the soil solution. Solutions with sulphates and nitrates addition (of two different pH values) were used to simulate acid rainfall. Passing liquid phase was analysed with respect to Al content and Al speciation. Differences were found in Al content and transport between different soils under spruce and beech covers. The soil sample under the spruce forest had a higher initial Al content than the soil sample under the beech forest. As a result, the Al leaching from the spruce soil sample and the final content of water-extractable Al in the soil (Al content after the leaching experiment) were higher compared to the beech soil sample. This suggests that Al mobility and potential toxicity in the beech forest are greater than those in the spruce monoculture when studied in the acidification endangered areas.
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