CENTRE ON THE PROBLEMS OF ECOLOGY AND PRODUCTIVITY OF FORESTS
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CENTRE ON THE PROBLEMS OF ECOLOGY AND PRODUCTIVITY OF FORESTS |
RUSSIAN ACADEMY OF SCIENCES |
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A.V. Mamai, N.G. Fedorets, A.L. Stepanov Nitrogen Fixation and Denitrification Processes in Podzolic Soils under Coniferous and Small-Leaved Forests in the Middle Taiga in Karelia // Forest Science (Lesovedenie). 2013. No 1. С.66-74. The actual and potential rates of nitrogen fixation and denitrification in soils of different genesis under coniferous and deciduous forests in the middle taiga of Karelia were determined by gas chromatography. The highest nitrogenase activity was recorded in the groundwater-gleyic podzolic soil under the grass-forbs birch stand. The content of easily available organic compounds in the soil is high due to the leaf falloff and herbaceous vegetation. As the nitrifying activity of the soils under natural forest stands is very low, no N2O emission was detected there. The intense N2O assimilation by podzols under pine and spruce forests suggests that these ecosystems act as a sink for nitrogen-bearing greenhouse gases. Forest soils, nitrogen fixation, denitrification, nitrous oxide, gas chromatography.. |
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