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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S.M. Razgulin Mineralisation of nitrogen compounds in soil of low-yield birch forest in the south of taiga zone // Forest Science (Lesovedenie). 2014. No 2. С.46-51. The net mineralization of nitrogen in soil layers (Аp1 0-6, Аp2 6-10, А2 10-20 cm) of peaty bleached gleyic soil in bilberry sphagnous birch forest (Yaroslavl Oblast) was measured by "in-situ" sample incubation with eight replications for every layer. During May-November period of 2011 2.1±0.4, 2.7±0.4 and 1.2±0.4 g N m-2 have mineralized in layers Аp1, Аp2 и А2 , respectively. The total of 6±0.7 g N m-2 have mineralized. Ammonification prevailed, constituting the 99.9.% of the total nitrogen mineralized. The seasonality of the process correlated with soil moisture content (r=0.8 at р=0.05) and carbon dioxide emission as an indicator of destruction process (r= 0.85 at р= 0.03; r= 0.65 at р=0.16) in layers Аp1 and Аp2. Seasonal variations in carbon dioxide production have controlled the ammonium flux of 3 ±0.9 mg N m-2 per season from soil. Leaf detritus have not compensated for the losses of soil carbon for carbon flux from the soil of birch forest. Nitrogen mineralization, ammonification, carbon dioxide production.. |
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