COMPARATIVE CHARACTERISTICS OF THE COMPOSITION OF WOODY PLANT LADY WHEN OVERGROWING FALLOW LANDS
UDC 630*160.2:581.5
Abstract
The article analyzes the results of the chemical composition of litter of woody plants growing on the territory of abandoned garden plots within the urban environment of Kemerovo. The object of research was plant litter collected under the canopy of woody plants. The vegetation cover was described, the dominant plant species and their general projective cover were determined. A comparative description of the composition of woody plant litter during the overgrowing of fallow lands revealed a dependence on the species and chemical composition. The reserve of phytomass, the level of nitrogen, phosphorus and polyphenolic compounds (tannins) in the litter of tree species were determined. The amount of phytomass at the sites varied from 3.1 to 5.1 t/ha of air-dry mass. Under the canopy of the trees under study, during the growing season, the leaf fraction predominated, the proportion of which was 72–94%. Among the indicators of the chemical composition of plant litter, the most pronounced difference was in the content of polyphenolic compounds; the content of nitrogen and phosphorus varied to a lesser extent. Acer negundo litter had the most intense mineralization, due to higher accumulation of phytomass, nitrogen and phosphorus, but low tannin content in comparison with trees of other species. The studied woody plants can be arranged according to the decrease in the content of phytomass, nitrogen and phosphorus in the following order: ash maple ˃ bird cherry ˃ silver birch. Experimental details can be used for biomonitoring of natural communities.
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