Soil properties as a component of predisposition factors of Norway spruce forest decline in the Hanusovicka highland mountain zone
Vavricek, D.(Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Lesnicka a Drevarska Fakulta)E-mail:[email protected] | Samec, P. | Simkova, P.
Mature Norway spruce stands affected by decline symptoms were selected in the northern part of the Hanusovicka highland, Czech Republic. Spruce stand (SS) 1 (700 m asl) was situated in conditions of the fir-beech forest altitudinal zone (FAZ). SS 2 (880-900 m asl) was situated in conditions of the spruce-beech FAZ. Research plots of the area 400 square m were selected in the stands according to different levels of damage and stand diversity. Complex soil analysis showed that the soil environment could be a part of stress factors, influencing the predisposition of non-natural Norway spruce monocultures at mountain locations. Stand decline was influenced by high Al3+ concentrations in soil mineral horizons. Al3+ combined with limiting Mg2+ concentration make root systems exist mainly in H-horizons or Ae/Ep-horizons. This causes stand predisposition to climatic drought and drought episodes.
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