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The influence of vegetation and succession age on pedogenesis in sand pits.
Svačinová, Ilona ; Chuman, Tomáš (advisor) ; Šefrna, Luděk (referee)
Sand Pits have great potential to restore via spontaneous succession. There are not many studies of the development of soils in sand pits; therefore, this work focuses on the development of soil properties in sand pits comparing technically reclaimed sites and sites with primary succession. 120 samples were collected at fourteen sand pits in South Bohemia and selected soil properties were assessed. The surveyed plot were grouped according to age, and the successional and technically reclaimed sites were distinguished. The results were evaluated by analysis of variation and regression analysis. The differences in soil bulk density, pH, thickness of soil organic horizon, Cox, N and C/N ratio between reclaimed and spontaneously restored sites of different age were analysed. The bulk density and pH decrease significantly on successional sites; however, the reclaimed sites do not show signifiant differences. Organic horizon thickness increases with age on both types of sites.Cox, N and C/N ratio do not show significant influence age. Lower values of Cox, N and C/N were measured in initial stages of succession. On the reclaimed sites there is almost no change in values of Cox, N and C/N ratio, because of the occurrence of nutrient-richer substráte used during technical reclamation. Keywords: soil...
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