ZLV Online

Abstrakt

Douglas-fir is one of the most successful examples of introduction in forestry. It plays also important role in the European as well as Czech forestry for its production, site stabilization and effects on soil. Presented article compares Douglas-fir and Norway-spruce forest soils at an oakbeech acidic-Cambisol site at an altitude of 455 m above sea level; the age of both monospecific parts of the stand was 39 years. Holorganic horizons (L+F1, F2+H) were sampled quantitatively (the samples were enclosed in 25 cm × 25 cm steel frame), mineral horizons (Ah, B) only qualitatively in 5 replications under both tree species. Results showed a higher accumulation of holorganic matter (67.82 t/ha vs. 53.36 t/ha) under Douglas-fir. Under this species, soil properties (higher pH, bases content, base saturation, lower exchangeable acidity and aluminum content) were more favorable. The total and plant-available nutrient contents were more variable, but in general indicated better nutrient dynamics under Douglas-fir. For this reason, Douglas-fir can be considered as site improving species in the Norway spruce stands.