DBPapers
DOI: 10.5593/SGEM2014/B32/S14.050

IMPACT OF IMPROVEMENT FELLING ON SOIL CARBON CONTENT IN COMMERCIAL FOREST STANDS (NORWAY SPRUCE MONOCULTURE)

T. Fabianek, L. Mensik, R. Buzkova, J. Kulhavy
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-14-8 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 2, 367-372 pp

ABSTRACT
Most European forests are used for commercial purposes. Spruce monoculture stands cover about 66% of total Czech forested area while 25% are broad-leaved forests. Due to their extent, monocultures play an important role in the context of global climate changes. The CO2 exchange between soil and atmosphere is one of the most important components of the carbon cycle in forest ecosystems is the CO2 exchange between soil and atmosphere. Hence, forestry management has the potential to change the CO2 flux in forests and the sink of CO2 in forest soils. The objective of this study was to analyze and compare soil respiration in a Norway spruce (Picea abies (L.) Karst.) plantation during the 2010 and 2011 vegetation seasons (April to November). The research plots were located in the Drahanská vrchovina Highlands (at the eastern edge of the Bohemian Massif). In the Czech Republic, optimum conditions for cultivation of Norway spruce stands were found here (at altitudes of 600-700 m). Measured soil respiration data and other soil characteristics were evaluated in young monoculture stands subjected to different kinds of forestry management. In spring 2010, we carried out two kinds of thinning of: 1/ subdominant trees in one stand; 2/ dominant trees in the other stand. The average amount of carbon released from the soil of the first stand was within the range of 8.0 – 11.2 t.ha-1 while from the other stand it was within the range of 10.0 – 10.28 t.ha-1. The respiration rates measured at 10 °C were, respectively, 3.73 μmol.m-2.s-1 in and 2.95 μmol.m-2.s-1.

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