Decline of Norway spruce in the Krkonose Mts.
2010
Mauer, O.,Mendelova Univ., Brno (Czech Republic). Ustav Zakladani a Pesteni Lesu | Palatova, E.,Mendelova Univ., Brno (Czech Republic). Ustav Zakladani a Pesteni Lesu
The paper summarizes results from the analyses of Norway spruce stands managed by the Forest Administration in Horni Marsov, Krkonose National Park (Czech Republic) which are affected by decline and by yellowing of the assimilatory apparatus. Forest stands were aged 10-80 years and originated from both artificial and natural regeneration. Analyses of root systems were combined with analyses of soil chemical properties and assimilatory organs, weather conditions and emissions. The analyses showed that affected trees had small and malformed anchoring root systems with a lower number of horizontal roots and a lower number of fine roots of lower vitality (high proportion of dead fine roots) which penetrated only through the uppermost humus horizons. Root systems of affected trees are infested by the honey fungus (Armillaria sp.) which colonizes anchor roots. Neither root nor bole rots were detected so far.
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