Harmful impact of exceptional cold air outbreak in april 1997 on silver fir in Croatia

Authors

  • Danko Dimic University of Zagreb, Faculty of Forestry, P.O. Box 422, 10002 Zagreb, Croatia
  • Boris Hrastovec University of Zagreb, Faculty of Forestry, P.O. Box 422, 10002 Zagreb, Croatia
  • Milan Glavas University of Zagreb, Faculty of Forestry, P.O. Box 422, 10002 Zagreb, Croatia
  • Nenad Potocic Forest Research Institute, Jastrebarsko, Croatia

DOI:

https://doi.org/10.14720/abs.47.1.16820

Keywords:

Abies alba, cold air damages, potassium, ž

Abstract

After a severe outbreak of cold air in mid and late April in 1997, locally occurring damages on twigs and needles of silver fir were recorded in some forests in Croatia. Field examinations in the first half of July 1997 revealed the damages on one-year and older needles while fully developed twigs of current year growth were left intact. Southern and western slopes with fir growing forests rep­ resented typically affected sites. Further laboratory analyses confirmed the field observation that no harmful insect or pathogens were the cause of these damages. Spread of symptoms, expressed more heavily at lower elevations, indicated a prob­ able connection with recent exceptionally cold air outbreak in mid-April. Physiological disturbances caused by potassium deficiency are discussed in the light of specific occurrences of damage symptoms on silver fir trees.

References

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Published

01.07.2004

Issue

Section

Original Research Paper

How to Cite

Dimic, D., Hrastovec, B., Glavas, M., & Potocic, N. (2004). Harmful impact of exceptional cold air outbreak in april 1997 on silver fir in Croatia. Acta Biologica Slovenica, 47(1), 27-30. https://doi.org/10.14720/abs.47.1.16820

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