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The contribution of roots to the release of C02 from peat has been examined in both field and laboratory experiments. In the field experiment, columns of peat were isolated from the surrounding peat and the green parts of the plants were continually removed in order to exhaust the living roots contained within the column. The isolated columns released c. 10-20% less C02 than the reference spots where only the growth of the green parts was restrained. C02 production in isolated columns was thereby reduced mostly in mire site types with largest dwarf shrub root biomass. In the greenhouse experiment, C02 release was c. 36% greater from containers containing willow (Salix phylicifolia) roots than from bare peat reference containers.
Keywords: Carbon allocation, decomposition, soil respiration
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Silvola,
Department of Biology, University of Joensuu, P.O. Box 111, FIN-80J0/ Joensuu, Finland
Sähköposti:
ei.tietoa@nn.oo
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Jukka,
Sähköposti:
ei.tietoa@nn.oo
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Ahlholm,
Sähköposti:
ei.tietoa@nn.oo
