Abstract

A lysimeter method with undisturbed soil columns was used to investigate how the water table affects the greenhouse gas (GHG) emissions from cultivated peat soils. The study was carried out using an organic soil from Örke in Sweden. This is a typical cultivated fen peat with low pH and high organic matter content. The 50 cm high lysimeters were supplied with water from below until saturation and the water table was then lowered from the surface in 5 cm step down to 45 cm below surface and raised again back to the surface. CO2, CH4 and N2O emissions from the lysimeters were measured at all water table levels and twice when the lysimeters were let to dry out even more. CO2 emissions increased as soon as air entered the profile and reached a stable rate (602 mg m-2 h-1) when the water table level was 20 cm but decreased when the soil got too dry. N2O emissions were low during the drainage phase but increased to 3 mg m-2 h-1 when the water table rose to the surface again. CH4 emissions were very low or negative.

Published in

Conference

Eurosoil, 4th international congress.

SLU Authors

• Berglund, Örjan

  • Department of Soil and Environment, Swedish University of Agricultural Sciences
    

• Berglund, Kerstin

  • Department of Soil and Environment, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Environmental Sciences related to Agriculture and Land-use


Permanent link to this page (URI)

https://res.slu.se/id/publ/39406