Health condition of spruce stands in the Orlicke hory Mts. in relation to climatic, anthropogenic and stand factors
2007
Zid, T.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Lesnicka a Drevarska Fakulta | Cermak, P.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Lesnicka a Drevarska Fakulta
Thirty-five sample plots were laid out in stands with the majority of spruce trees aged over 70 years (in total 700 trees). The plots were located in the vicinity of Anensky vrch Hill (Orlicke hory Mts., Czech Republic) at altitudes over 800 m above sea level. The following traits were determined during the growing season 2005: total defoliation, defoliation of the primary structure, percentage of secondary shoots, presence and extent of yellowing and browning. In 10 selected trees, branches were taken from crowns for morphological analyses. The total defoliation and the occurrence of yellowing were related to slope orientation and position of the plot towards the ridge. The number of shoots produced correlated with the level of annual NO3 deposition. The determined difference in the occurrence of yellowing between limed and unlimed plots cannot be interpreted unambiguously, because limed and unlimed plots differ in exposure at the same time. The importance of slope orientation for tree health shows that climatic factors are decisive for the resulting effect of the synergetic action of stressors on forest stands.
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