Characterization of SOM: The role and determination of soil labile carbon
2009
Saljnikov, E., Institute of Soil Science, Belgrade (Serbia) | Kostić-Kravljanac, L., Institute of Soil Science, Belgrade (Serbia) | Jaramaz, D., Institute of Soil Science, Belgrade (Serbia)
One of the effects of global warming will be accelerating the decomposition of soil organic matter, thereby releasing CO2 to the atmosphere, which will further enhance the warming trend. In the Kyoto Protocol of 1997, organic carbon stored in arable soils is to be included in calculations of net carbon emissions. SOM can be divided into labile or rapidly decomposed, and stable or slowly decomposed fractions. Labile carbon is the fraction of soil organic carbon with most rapid turnover times and its oxidation drives the flux of CO2 between soils and atmosphere. Labile organic matter pools can be considered as fine indicators of soil quality as well that influence soil function in specific ways and that are much more sensitive to changes in soil management practice than the stable fraction. Measurement of potentially mineralizable C represents a bioassay of labile organic C using the indigenous microbial community to release labile organic fractions of C.
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