Phosphorus sorption–desorption in alluvial soils of a young weathering sequence at the Danube River

• DOI: 10.1016/j.geoderma.2008.11.011
• Publication Date: 2008-12-22T09:42:10Z
• Authors: Georg J. Lair; Franz Zehetner; Zakir H. Khan; Martin H. Gerzabek
• Keywords: Podzol; Cambisol; Gleysol

Abstract Soil parameters change continuously over time and the duration of pedogenesis may significantly affect a soils' sorption capacity for nutrients and contaminants. In former studies, we showed that progressing pedogenic development had increased the retention capacities for Cu and Cd in young alluvial soils at the Danube River (Austria). The present study was conducted to evaluate the impact of pedogenesis on phosphorus (P) retention in these soils, which represent a weathering sequence covering an age gradient from − 1 was added. The subsequent desorption experiments with 0.01 m KCl solution revealed a high mobility (up to 89%) of this recently added P. Correlation analyses showed that P retention in the studied samples was positively correlated to dithionite-extractable Al, Mn and Fe, oxalate-extractable Mn and clay content. The present study revealed that P sorption was not influenced by soil development. The composition of the soil parent material, as affected by differences in sedimentation conditions across the studied floodplain, had a stronger impact on P sorption than the changes induced by 500 yr of pedogenesis under the continental climate of Central Europe.