Nitrogen fixation and carbon dioxide emission in southern taiga ecosystems

摘要

The productivity of nitrogen fixation in oxalis-bilberry and bilberry-sphagnum birch forests was studied. Accumulation of nitrogen during the growing season varied from 0.8-1 kg/ha in 1994 and 1995 to 2 kg/ha in 1993 and was similar in both fore, st types. The amount of nitrogen accumulated is commensurable with the amount of nitrogen added to soil with precipitation. Carbohydrates of litter (in the oxalis-bilberry birch forest) and methane emission (in the bilberry-sphagnum birch fore,sO could serve as the sources of energy for nitrogen fixation.