Content of nutrients in surface soil horizon and in aboveground part of Ruburs hirtus Waldst. et Kit. | Obsah živín v pokryvnom humuse a v nadzemnej časti druhu Rubus hirtus Waldst. et Kit.
2009
Sýkora, A., Slovak Academy of Sciences, Zvolen (Slovak Republic). Institute of Forest Ecology | Kuklová, M. | Kukla, J.
The content of selected macronutrients (Ca, Mg, K, P, C, N) in the surface soil horizon and in aboveground part of Rubus hirtus species was studied on five research plots situated in the Štiavnické vrchy Mts. and in the Kremnické vrchy Mts. Experimental plots were established in stands of the forest type group Fagetum pauper superiora, in different phases of their development. In the surface humus, the lowest content of Ca (5 056 mg per kg), Mg (712 mg per kg) and P (634 mg per kg) has been found in the 10-year old stand, the highest contents in the 60-80 year old stemwood (Ca - 17 828 mg per kg, Mg - 1 630 mg per kg), P in the 200-year old primeval forest (833 mg per kg). The lowest amount of K has been found in the primeval forest (l 409 mg per kg) and the highest one in the stand 10 years after cutting (l 727 mg per kg). The studied geobiocoenoses differed significantly (a less than 0.05) in contents of Ca and Mg especially between IO-year old stand and the other stands. The contents of P differed significantly in the litter layer (Dol) between 10-year old stand and the other geobiocoenoses. By contrast, the values founded in the fermenting litter horizons (Oof) of studied ecosystems were not significant. The content of C in the surface humus varied from 45.0 to 48.4%, values of N from 0.9 to 1.5%. The C:N ratio in the surface humus was the highest in the 10-year old stand (55.8%), the lowest in the primeval forest (32.0%). The mean amounts of nutrients (mg per kg of dry matter) in the Rubus hirtus species decreased as follows: K(12 278-19 143) more than Ca (7 787-12 223) more than Mg (3 471-4 426) more than P (1 430-1 766). The lowest C:N ratio has been found in the 20-40-year old beech pole stage (48.3%), the highest in the 200-year old primeval forest (50.4%). The differences in conten nutrients in the studied herb species were not statistically significant.
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