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Stand Age and Tree Species Affect N2O and Ch4 Exchange from Afforested Soils : Volume 8, Issue 3 (20/06/2011)

By Christiansen, J. R.

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Book Id: WPLBN0004005893
Format Type: PDF Article :
File Size: Pages 32
Reproduction Date: 2015

Title: Stand Age and Tree Species Affect N2O and Ch4 Exchange from Afforested Soils : Volume 8, Issue 3 (20/06/2011)  
Author: Christiansen, J. R.
Volume: Vol. 8, Issue 3
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Gundersen, P., & Christiansen, J. R. (2011). Stand Age and Tree Species Affect N2O and Ch4 Exchange from Afforested Soils : Volume 8, Issue 3 (20/06/2011). Retrieved from http://www.ebooklibrary.org/


Description
Description: Division of Biomass and Ecosystem Science, Forest & Landscape Denmark, Faculty of Life Sciences, University of Copenhagen, Rolighedsvej 23, 1958 Frederiksberg C, Denmark. Afforestation of former agricultural land is a means to mitigate anthropogenic greenhouse gas emissions. The objectives of this study were to assess the effect of pedunculate oak and Norway Spruce of different stand ages (13–17 and 40 yr after afforestation, respectively) on N2O and CH4 exchange and identify the environmental factors responsible for the differences in gas exchange between tree species of different ages. N2O and CH4 fluxes (mean ± SE) were measured for two years at an afforested site. No species difference was documented for N2O emission (oak: 4.2 ± 0.7 μg N2O-N m−2 h−1, spruce: 4.0 ± 1 μg N2O-N m−2 h−1) but the youngest stands (1.9 ± 0.3 μg N2O-N m−2 h−1) emitted significantly less N2O than older stands (6.3 ± 1.2 μg N2O-N m−2 h−1). CH4 exchange did not differ significantly between tree species (oak: −8.9 ± 0.9, spruce: −7.7 ± 1) or stand age (young: −7.3 ± 0.9 μg CH4-C m−2 h−1, old: −9.4 ± 1 μg CH4-C m−2 h−1) but interacted significantly; CH4 oxidation increased with age in oak and decreased with age for Norway Spruce. We conclude that the exchange of N2O and CH4 from the forest soil undergoes a quick and significant transition in the first four decades after planting in both oak and Norway Spruce related to physical changes in the top soil and availability of soil N.

Summary
Stand age and tree species affect N2O and CH4 exchange from afforested soils

Excerpt
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