Qualitative vitality of tree species of the submontane forests [in Slovakia]
1996
Kmet, J. (Technical Univ., Zvolen (Slovak Republic). Dept. of Phytology)
In assessing the impact of pollution on a forest stand the question of tree vitality is foremost. A tree species is considered vital if its life activity adapts to the environmental impact so that no injuries occur; vitality is the capability of adapting to the existing environmental conditions through self-regulatory systems. In the course of damage development, a latent stage without visual symptoms may be observed, but during which a species may exhibit biochemical changes. Needles of the Austrian black pine were sampled; total content of fluorine ions in tissue structures was determined, and the scanning electron microscope was used for studying the superficial microstructure of the needles. The atmospheric immissions over the surface of the needles were localised using a modified method with liquid nitrogen. It was concluded that the vitality of forest tree species and their stability are evidently influenced by specific species and their individual properties and site conditions
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