Abstract
under the influence of the prognosticated climatic changes, the increasing rate of degradation and the extension of uncultivated lands, it is expected that the dominance of some C4 plants will increase. Bermuda grass (Cynodon dactylon) is the most common C4 species in Hungary. The chemical composition of Cynodon dactylon and its substrate was investigated on 3 soil types (Arenosol, Solonchak soil and a waste place) typical of the country. It was established that in comparison with other perennial C4 grasses (Andropogon ischaemum, Chrysopogon gryllus, Cleistogenes serotina) the total element content of Cynodon dactylon was the highest. A detailed quantitative and qualitative knowledge of the chemical components of C4 plants could help to determine the expected changes in the chemical composition of the uppermost soil layer and in its mineralization dynamics on areas dominated by these plants. As a result of the expansion of Cynodon dactylon the element concentration and the chemical composition of the soils might change, thus influencing successional processes as well.
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