Abstract
Studies performed on dark gray loamy forest soils in an oak forest in the southern forest steppe and on sandy soddy-podzolic soil in a pine forest in the southern taiga showed that the annual emission of CO2 from the soil surface in the pine forest was 16.3 t CO2/ha, including 10.1 t CO2/ha due to root respiration and 6.2 t CO2/ha due to soil microbial respiration. In the southern forest steppe, the corresponding values were 17.8 t CO2/ha due to root respiration at the optimum water content (20%) and 28.3 t CO2/ha due to soil microbial respiration. With the insufficient soil water content (12.5%), 10.3 and 17.8 t CO2/ha were due to root respiration and soil microbial respiration, respectively. Under strong drought conditions (water content of 10%), the emission of CO2 decreased to 8.2 and 16.3 t/ha due to root respiration and soil microbial respiration, respectively.
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Molchanov, A.G. CO2 emission from the surface of dark gray forest soils of the forest steppe and sandy soddy-podzolic soils of the southern taiga. Eurasian Soil Sc. 42, 1470–1478 (2009). https://doi.org/10.1134/S1064229309130079
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DOI: https://doi.org/10.1134/S1064229309130079