Effects of Giant fir cultivation on the humus form
2003
Podrazsky, V.V. (Ceska Zemedelska Univ., Prague (Czech Republic). Katedra Pestovani Lesu)
The effects of Giant fir cultivation on the humus form status, especially the accumulation of the surface holorganic layers and their pedochemistry, are compared with those of the Norway spruce cultivation. Quantitative sampling (end of September 2000) of the holorganic horizons was performed (frame 25 x 25 cm in four replications) and basic pedochemical analyses were done: pH, adsorption complex characteristics by Kappen, exchangeable acidity, total nitrogen, humus, macroelements (N, P, K, Ca, Mg) and plant available macroelement concentrations. Giant fir represented an intensively growing tree species with the production of relatively favourable litter and intense uptake of nutrients. This is reflected in the lower surface humus accumulation than in the spruce stand (16.528 t/ha vs. 28.636 t/ha), its lower acidity and higher bases content. Fir uptake of limited bioelements (especially N and P) decreased their concentration in the forest soil.
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