出版社：Výzkumný Ústav Lesního Hospodárství a Myslivosti
摘要：The article deals with changes of the humus forms during the stand regeneration, comparing the old Norway spruce stand with slightly broken canopy for natural regeneration on the territory of the School Training Forest Kostelec nad Černými lesy with: parts with intense Silver fir-oak canopy lowering for natural regeneration support and two gaps where beech and oak were planted. The experimental plots are situated on a moderate slope at the altitude of 400 - 420 m a.s.l. The bedrock is grandiorite, site is characterized by the forest type 41 - fresh oak-fir forest with Oxalis acetosella. The studied stand part is characterized by transition from Luvisol (dominant) to Pseudogley. The humus form samples (L, F, H, Ah horizons) were sampled in 4 replications, quantitatively for the holorganic (forest floor) layers. The dry mass amount and total nutrient contents were analyzed for holorganic, the basic pedochemical characteristic (pH, soil adsorption complex characteristics and exchangeable nutrients) for all horizons. The results confirmed positive effects ofparticular species, respectively of the broadleaves on the surface layers characteristics. The changes during natural regeneration process were also visible. Opening of the canopy increased the surface organic matter mineralization and transformation intensity. Special attention has to be paid to nitrogen. Dynamic changes of the humus form dynamics have to be considered at the forest stand and silvicultural approach transformation.
