Analysis of the soil organic matter stability in spruce forests of Krkonose in Czechia on the basis of the ROMUL mathematical model |
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| Authors: | M A Nadporozhskaya P ?udlin F Novak S S Bykhovets O G Chertov A S Komarov A V Mikhailov |
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| Institution: | (1) Biological Research Institute, St. Petersburg State University, sh. Orianienbaumskoe 2, Staryi Peterhof, St. Petersburg, 198904, Russia;(2) Institute of Systems Biology and Ecology Problems, Ceske Budejovice, CZ-370 05, Czech Republic;(3) Biology Center, Ceske Budejovice, CZ-370 05, Czech Republic;(4) Institute of Physicochemical and Biological Problems of Soil Science, Russian Academy of Sciences, ul. Institutskaya 2, Pushchino, Moscow oblast, 142290, Russia |
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| Abstract: | Computational experiments with the ROMUL mathematical model were performed for studying the dynamics of soil organic matter (SOM) in spruce forests of northeastern Czechia that were disturbed because of the atmospheric sulfur deposition in the second half of the 20th century. The effect of the soil acidification on the decomposition dynamics of the forest die-back in the model is of importance. Conditions of the forest productivity were found under which the SOM pool could be preserved. It was shown that, later on, the content of the litter will decrease because of the forest degradation, and the succession changes due to the effect of the contamination will affect the type of vegetation, as well as the type of soil organic matter. The total SOM content will decrease in this case. However, the maintenance of the grass productivity can slow down this process. It was noted that the quantitative prediction of the SOM dynamics requires measurements of the productivity parameters of the forest as a whole and the living ground cover, including the content of root litter, and the hydrothermal regime of the soil determining the transformation of the litter and humus. |
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