Sergei Razgulin

• Russian Academy of Sciences

Denitrification losses of nitrogen-containing gases in the biome of boreal forests are discussed. In the soils of coniferous and deciduous forests of Western Europe, 0.57 ± 0.2 and 1.0 ± 0.2 kg N-N2O/ha/ year are lost during denitrification. In North America this figure was 0.35 ± 0.29 kg N-N2O/ha/yr for all stands. The emission of N2O from forest...

For two years, the contribution of fungi and bacteria to the process of net ammonification in the soddy-podzolic soil of the sorrel-blueberry birch forest of the Yaroslavl region was determined using inhibitory analysis. Established, that the litter is characterized by an equal participation of fungi and bacteria in this process. In the humus horiz...

Despite the insignificant contribution to the total forest phytomass, fine roots form 30% of the production of forest ecosystems, playing a crucial role in biogeochemical cycles. However, estimates of the biomass, annual production, dieback, and age of fine roots remain understudied, especially in Russian forests, due to technical difficulties. The...

Net mineralization of nitrogen was measured in the horizons of peaty podzolic gley soil (At1, 0-6 cm, At2, 6-10 cm, and A2, 10-20 cm) of the bilberry-sphagnum birch forest from May to the beginning of November in 2011 and 2012; it comprised 2.1 ± 0.4, 2.7 ± 0.4, 1.2 ± 0.4, and 1.9 ± 0.2, 1.9 ± 0.2, 0.8 ± 0.15 g N/m2, respectively. The total of 6 ±...

The total mineralization of nitrogen in the AO-A1 (0–6 cm), A1 (6–11 cm), and A2 (11–21 cm) horizons of a soddy pale-podzolic soil under an oxalis birch forest in Yaroslavl oblast was measured from May to November in 2009 and 2010 and comprised 6.7 ± 0.9, 3.0 ± 0.4, and 5.5 ± 0.6 g of N/m2 in 2009 and 5.6 ± 0.5, 2.5 ± 0.2, and 2.1 ± 0.5 g of N/m2 i...

The productivity of the nitrogen mineralization in the A0 (0–2 cm), A1 (2–3 cm), and A2 (3–13 cm) horizons of a soddy-podzolic soil was measured in a wood-sorrel-whortleberry birch forest (7Birch3Asp, 80 years, the second stand quality class, tree canopy density 0.7, Yaroslavl oblast) using the sample incubation method; the measurements were perfor...

The mineralization of nitrogen in forest soils, one of the processes that provides forest ecosystems with nitrogen, has practically not been studied in Russia. A variant of the method used for the measurement of the nitrogen mineralization in forest soils is proposed, and a description of its field and laboratory stages is given. At the field stage...

The mean seasonal rates of the ammonia nitrogen emission from a soddy-podzolic soil under an oxalis-bilberry birch forest in Yaroslavl oblast were measured from May to October in 2005 and 2006 and comprised 27 ± 14 and 25 ± 11 mug N/m2 per day, which corresponded to 44 ± 23 and 32 ± 15 g N/ha, respectively. The maximum rates of the emission had a p...