Abstract
Most decomposition studies have focussed on litter decomposition (Aerts 1997), and few studies concern decomposition of organic matter in humus layer and mineral soil. This is especially true for deeper soil horizons. In materials with a low decomposition rate, determination of CO2 evolution rate is a more sensitive way of estimating decomposition during a limited period of time than determining weight loss in litterbags. The efflux of CO2 from soil (soil respiration) originates not only from decomposer organisms assimilating organic matter but also from root and mycorrhizal respiration. To estimate the heterotrophic soil respiration, roots and mycorrhizal respiration must be excluded, for example, by removing roots and mycorrhiza through sieving. Although sieving disturbs the soil structure, we considered sieving as the best practical method for comparison of heterotrophic soil respiration [here called carbon (C) mineralisation] in different soil layers and at different sites. The sites are presented in Persson et al. (Chap. 2, this Vol.), and detailed site characteristics are given in Tables 2.1 and 2.3.
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Persson, T., Karlsson, P.S., Seyferth, U., Sjöberg, R.M., Rudebeck, A. (2000). Carbon Mineralisation in European Forest Soils. In: Schulze, ED. (eds) Carbon and Nitrogen Cycling in European Forest Ecosystems. Ecological Studies, vol 142. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-57219-7_12
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DOI: https://doi.org/10.1007/978-3-642-57219-7_12
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