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Changes in SOM under short-rotation forestry with fast-growing tree species

Hilke, Ines and Henkel, Kathrin and Gruner, Kati and Barth, Martin and Baum, Christel and Leinweber, Peter and Gleixner, Gerd (2013) Changes in SOM under short-rotation forestry with fast-growing tree species. In: Jahrestagung Deutsche Bodenkundliche Gesellschaft, 07.-12.09.2013, Rostock.

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Abstract

Soil carbon storage is strongly affected by land use and land use change. Afforestation with fast growing tree species on former arable soils may increase soil organic carbon (SOC) contents due to the reduction in soil cultivation frequency. The DFG-funded project „The mycorrhiza-mediated pathway for soil organic matter (SOM) formation and consequences for the SOM turnover under short rotation forestry“ investigates two major types of mycorrhiza formation as a function of land use and the importance of composition, stability and storage of SOM. In our subproject we compared SOC stocks of ongoing short rotation forestry (SRF) and former forestry fields (f-SRF). This leads to the following questions: i) Is there a long-term increase in carbon storage under current SRF schemes; and ii) Is this carbon storage under SRF sustainable; what are the consequences of transforming forest soils back into arable land? Two current (SRF) and two former (f-SRF) (Populus nigra x P. maximowiczii) test sites in different temporal stages of change were selected, with corresponding reference sites (REF)in each case. We found an accumulation of SOC in topsoil of current long-term SRF in comparison to REF, but lower carbon content in the subsoil. In former SRF sites accumulation of SOC was not detectable and we found no increase in the total SOC stocks per site. Effects are marked by soil treatment. Variance in total accumulation of SOC occurs in spatial distribution of investigated areas and was effected by its annual variabilities. Combined, the investigations results in following: i) SRF changes the carbon distribution in the anthric horizon. However, a total carbon storage change could not be detected. ii) The differences in carbon distribution were quickly removed by planting.

Item Type: Conference or Workshop Item (Contribution to "Reports of the DBG")
Uncontrolled Keywords: soil organic carbon, carbon storage, short-rotation forestry, sustainability
Depositing User: Ines Hilke
Date Deposited: 21 Oct 2013 14:15
Last Modified: 21 Oct 2013 14:15
URI: http://eprints.dbges.de/id/eprint/952

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