Growth and anatomical characteristics of scots pine (Pinus sylvestris L.) exposed to de-icing salt spray
2002
Levanic, T. (Slovenian Forestry Inst., Ljubljana (Slovenia)) | Oven, P. (Ljubljana Univ. (Slovenia). Biotechnical Fac., Wood Science and Technology Dept.)
On fifteen Scots pines (Pinus sylvestris L.) affected by spraying salt and on five comparable Scots pines on a reference site, differences in diameter and height growth as well as the content of chlorine ions in the needles and their length have been studied. Additionally, basic anatomical features of radial cross-sections of the axial tracheids in early-, "transitional" and latewood have been studied (lumen area, lumen perimeter and lumen shape).Results show that trees which grow under the salt stress conditions, in comparison with reference trees on a reference site, grow more slowly in height and diameter, have shorter needles and a considerably higher content of chlorine ion in needles (up to 20x). On a microscopic level, statistically significant differences have been found between affected and healthy pine trees. The average lumen area and the shape of the axial tracheids were significantly different in early- and "transitional" wood. No differences have been found in latewood. The research showed that needle morphology and chemical analysis of chlorine ion content in needles gave good results and seems to be less time consuming than histometrical analysis in studying the effects of spraying salt on conifers.
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