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CO2 and CH4 fluxes and carbon stock changes of peat soils in relation to differences in soil water content

Ramirez, A. and Sauer, D. and Lamers, M. and Billen, N. and Stahr, K. (2009) CO2 and CH4 fluxes and carbon stock changes of peat soils in relation to differences in soil water content. In: Böden - eine endliche Ressource, September 2009, Bonn.

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Abstract

In natural conditions peat soils exhibit high groundwater levels leading to a reduction of mineralization processes and hence favoring the accumulation of organic matter. Therefore peat soils under anaerobic conditions are considered to be a large sink of atmospheric CO2, but a source of methane (CH4). Drosler et al (2007) reported a high average CH4 flux of 1,27 mg C m2 h-1 from peat soils in Germany and the Netherlands under saturated conditions. Historically, more than half of the peat soils in Germany have been drained for agricultural purposes, and many of them are currently being restored by raising the groundwater levels. The effect of restoration on the total soil C emission is still unclear, due to the high temporal variability of CO2 and CH4 fluxes, often associated with fluctuations of the water table. This study 1) compares CO2 and CH4 fluxes from Histosols of the Danube floodplain near Ulm (S-Germany), differing in water regime from August 2008 to January 2009, and 2) estimates the contribution of vegetation cover to soil C emission.

Item Type: Conference or Workshop Item (Contribution to "Reports of the DBG")
Uncontrolled Keywords: greenhouse gas emissions, peat soils, groundwater level.
Divisions: Kommissionen > Kommission IV: Bodenfruchtbarkeit und Pflanzenernährung
Depositing User: Andrea Frauenknecht
Date Deposited: 30 Nov 2009 16:26
Last Modified: 13 Dec 2015 16:24
URI: http://eprints.dbges.de/id/eprint/429

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