J. For. Sci., 2011, 57(4):131-140 | DOI: 10.17221/109/2010-JFS

Available nitrogen in the surface mineral layer of Serbian forest soils

Ž.S. Dželetović1, R.N. Pivić2, N.L.J. Djurović3
1 INEP - Institute for the Application for Nuclear Energy, University of Belgrade, Zemun, Serbia
2 Institute of Soil Science, Belgrade, Serbia
3 Faculty of Agriculture, University of Belgrade, Zemun, Serbia

Based on a greenhouse experiment, we evaluated nitrogen availability in the surface mineral layer of soil under various deciduous forest stands by analysing the following soil characteristics: total organic C, total N, initial content of easily available N inorganic forms, mineralized N content obtained by aerobic and anaerobic incubations and A-value. The experiment was performed on a test plant and through the application of urea enriched with 5.4% 15N.The studied forest soils are characterized by high mineralization intensity and high N availability indices. Aerobic incubation appears to be the most appropriate method for evaluating the available N content. The amounts of mineralized and nitrified N, obtained by aerobic incubation, with subtraction of the initial content of available mineral N forms are in correlation (P ≤ 0.05) with total organic C content (r = 0.916) and total soil N (r = 0.903) while the correlation with the C/N ratio is poor (r = 0.645).

Keywords: A-value; C, N ratio; total organic C; total soil N

Published: April 30, 2011  Show citation

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Dželetović ŽS, Pivić RN, Djurović NLJ. Available nitrogen in the surface mineral layer of Serbian forest soils. J. For. Sci. 2011;57(4):131-140. doi: 10.17221/109/2010-JFS.
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