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Comparison of Soil Greenhouse Gas Fluxes from Extensive and Intensive Grazing in a Temperate Maritime Climate : Volume 9, Issue 8 (02/08/2012)

By Skiba, U.

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Book Id: WPLBN0004005999
Format Type: PDF Article :
File Size: Pages 29
Reproduction Date: 2015

Title: Comparison of Soil Greenhouse Gas Fluxes from Extensive and Intensive Grazing in a Temperate Maritime Climate : Volume 9, Issue 8 (02/08/2012)  
Author: Skiba, U.
Volume: Vol. 9, Issue 8
Language: English
Subject: Science, Biogeosciences, Discussions
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Helfter, C., Drewer, J., Jones, S. K., Dinsmore, K., Mckenzie, R., Sutton, M. A.,...Skiba, U. (2012). Comparison of Soil Greenhouse Gas Fluxes from Extensive and Intensive Grazing in a Temperate Maritime Climate : Volume 9, Issue 8 (02/08/2012). Retrieved from http://www.ebooklibrary.org/


Description
Description: Centre for Ecology and Hydrology, Bush Estate, Penicuik, Midlothian EH26 0QB, UK. Greenhouse gas (GHG) fluxes from a seminatural, extensively sheep grazed drained moorland and intensively sheep grazed fertilised grassland in SE Scotland were compared over 4 yr (2007–2010). Nitrous oxide and CH4 fluxes were measured by static chambers, respiration from soil including ground vegetation by a flow through chamber and the net ecosystem exchange of CO2 by eddy covariance. All GHG fluxes displayed high temporal and interannual variability. Temperature, radiation, water table height and precipitation could explain a significant percentage of seasonal and interannual variations. Greenhouse gas fluxes were dominated by the net ecosystem exchange of CO2, emissions of N2O from the grazed grassland (384 g CO2eq m<sup>−2 yr−1) and emissions of CH4 from ruminant fermentation (147 g CO2eq m<sup>−2 yr−1). Methane emissions from the moorland were small (6.7 g CO2eq m<sup>−2 yr−1). Net ecosystem exchange of CO2 and respiration were much larger on the productive fertilised grassland (−1624 and +7157 g CO2eq m<sup>−2 yr−1, respectively) than the seminatural moorland (−338 and +2554 g CO2eq m<sup>−2 yr−1, respectively). Large CH4 and N2O losses from the grazed grassland counteracted the CO2 uptake by 35%, whereas the small N2O and CH4 emissions from the moorland did only impact the NEE by 2%.The 4 yr average GHG budget for the grazed grassland was 1006 g CO2eq m<sup>−2 yr−1 and 331 g CO2eq m<sup>−2 yr−1 for the moorland.

Summary
Comparison of soil greenhouse gas fluxes from extensive and intensive grazing in a temperate maritime climate

Excerpt
Bakken, L. R., Bergaust, L., Liu, B., and Frostegard, A.: Regulation of denitrification at the cellular level: a clue to the understanding of N2O emissions from soil, Philos. T. Roy. Soc. B, 367, 1226–1234, 2012.; Bouwman, A. F.: Direct emission of nitrous oxide from agricultural soils, Nutr. Cycl. Agroecosys., 46, 53–70, 1996.; Cardenas, L. M., Thorman, R., Ashlee, N., Butler, M., Chadwick, D., Chambers, B., Cuttle, S., Donovan, N., Kingston, H., Lane, S., Dhanoa, M. S., and Scholefield D.: Quantifying annual N2O emission fluxes from grazed grassland under a range of inorganic fertiliser nitrogen inputs, Agr. Ecosyst. Environ., 136, 218–226, 2010.; Clayton, H., Arah, J. R. M., and Smith, K. A.: Measurement of nitrous oxide emissions from fertilised grassland using closed chamber, J. Geophys. Res., 99, 16599–16607, 1994.; Dengel, S., Levy, P., Grace, J., Jones, S. K., and Skiba, U. M.: Methane emissions from sheep pasture, measured with an open-path eddy covariance system, Global Change Biol., 17, 3524–3533, 2011.; Dinsmore, K. J.: Atmosphere-Soil-Stream Greenhouse GS Fluxes from Peatland, PhD Thesis, University of Edinburgh, UK, 2008.; Dinsmore, K. J., Skiba, U. M., Billett, M. F., Rees, R. M., and Drewer, J.: Spatial and temporal variability in CH4 and N2O fluxes from a Scottish ombrotrophic peatland; implications for modelling and upscaling, Soil Biol. Biochem., 41, 1315–1323, 2009.; Dise, N. B., Gorham, E., and Verry, E. S.: Environmental-factors controlling methane emissions from peatlands in Northern Minnesota, J. Geophys. Res., 98, 10583–10594, 1993.; Drewer, J., Lohila, A., Aurela, M., Laurila, T., Minkkinen, K., Penttilä, T., Dinsmore, K. J., McKenzie, R., Helfter, C., Flechard, C., Sutton, M. A., and Skiba, U. M.: Comparison of greenhouse gas fluxes and nitrogen budgets from an ombotrophic bog in Scotland and a pristine mire in Finland, Eur. J. Soil Sci., 61, 640–650, 2010.; Flechard, C. R., Ambus, P., Skiba, U., Rees, R. M., Hensen, A., van Amstel, A., van den Pol-van Dasselaar, A., Soussana, J.-F., Jones, M., Clifton-Brown, J., Raschi, A., Horvath, L., Neftel, A., Jocher, M., Ammann, C., Leifeld, J., Fuhrer, J., Calanca, P., Thalman, E., Pilegaard, K., Di Marco, C., Campbell, C., Nemitz, E., Hargreaves, K. J., Levy, P., Ball, B. C., Jones, S., van de Bulk, W. C. M., Groot, T., Blom, M., Domingues, R., Kasper, G., Allard, V., Jolivot, D., Cellier, P., Laville, P., Henault, C., Bizouard, F., Abdalla, M., Williams, M., Baronti, S., Berretti, F., and Grosz, B.: Effects of climate and management intensity on nitrous oxide emissions in grassland systems across Europe, Agr. Ecosyst. Environ., 121, 135–152, 2007.; IPCC 2006: IPCC Guidelines for National Greenhouse Gas Inventories; Prepared by the National Greenhouse Gas Inventories Programme, IPCC, Japan, 2006.; IPCC 2007: Climate Change: The Physical Science Basis. Technical summary, in: Contribution of Working Group 1 to the Forth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K. B., Tignor, M.,Miller, H. L., Cambridge University Press, Cambridge, UK, 2007.; Jones, S. K., Rees, R. M., Skiba, U. M., and Ball, B. C.: Influence of organic and mineral


 

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