Plant inputs can be an important contribution to peatland soil DOC, which is an important source of DOC to the oceans, but the role of these inputs likely changes under different conditions and with different plant species composition. Large areas of peatlands have been disturbed by mining for their peat as well as being drained for agricultural purposes. Faster decomposition of the drained peat can lead to the disturbed peatlands becoming sources of carbon and nutrients, especially nitrogen and phosphorus, to the environment. Raising the water level is often done to restore disturbed peatlands, resulting in the restored peatlands again becoming carbon and nutrient sinks. The Borkovice peatland complex near Veselí nad Lužnici was partially ditched and drained to allow for easier mining of the peat deposits. Restoration efforts began in 2002 in a portion of these disturbed areas. This resulted in the formation of a restoration time series (chronosequence) running from still disturbed, non-restored areas to areas that have undergone restoration for 15 years. In addition, parts of the peatland are still relatively undisturbed.

Cíle práce: 

The aim of this project is to study changes in plant inputs, namely from plant litter decomposition and root exudates, to the peat soil and their possible contribution to soil DOM along the restoration chronosequence.

Materiál a metody: 
  • collect root exudates using a culture-based method and scan roots

  • determine exudate composition by ion exchange chromatography as well as total organic C and total N

  • measure mass loss and changes in litter nutrient contents due to decomposition of plant litter using litter bags