Harmful impact of exceptional cold air outbreak in april 1997 on silver fir in Croatia
DOI:
https://doi.org/10.14720/abs.47.1.16820Keywords:
Abies alba, cold air damages, potassium, žAbstract
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
ANIC, J 1973: Plant nutrition. Faculty of Agriculture, University of Zagreb, 180 pp.
AOAC 1996: Official methods of analysis of AOAC International, Association of Official Analytic Chemists International, Arlington, VA.
BAULE, H. & C. FRICKER 1970: The fertiliser treatment of forest trees. BLV-Verlagsges, Munchen, 223 pp. BERGMANN, W. 1992: Nutritional Disorders of Plants - Development, Visual and Analytical Diagnosis. Gustav Fischer Verlag Jena etc., 361 pp.
BRZOVIC N. 1999: A case study of a cold air outbreak on 20 April 1997 over Croatia. Croatian meteoro logical journal, 33/34: 1-18.
EDLIN H. L. & M. NIMMO 1956: Tree injuries. Thames & Hudson, London - New York, 167 pp. FORDERER L., J. THUDIUM, J. HERTZ, P. BUCHER, R. PANI, R. HUBER & M. KNECHT 1990: Untersuchungen in Zusammenhang mil den Nadelverrotungen des Winters 1986/87 am Flascherberg (St. Luzisteig). Schweizerische Zeitschrift fi.ir Forstwesen, 141 (10): 837-849.
FORSTER B., E. JANSEN, H. SCHERRER, M. LEIDIG, H. TURNER, R. HASLER, W. SCHONENBERGER, N. KUHN, W. KELLER, P. LUSCHER, J. BUCHER & w. LANDOLT 1988: Yerrotungen immergruner Nadelbaume im Winter 1986/87 in der Schweiz. Berichte Eidgenossische Anstalt fi.ir das Forstliche Versuchswesen, No. 307, 90 pp.
HARTMANN G., F. NIENHAUS & H. BUTIN 1988: Farbatlas Waldschaden. Diagnose von Baumkrankheiten. Verlag Eugen Ulmer, Stuttgart, 256 pp.
MENGEL, K. & E.A. KIRKBY 1987: Principles of Plant Nutrition. International Potash Institute, Bern, 686 pp.
REIF A. & V. T. PAPP 1995: Spatfrostschaden in Sudwestdeutschland im Mai 1995. Allgemeine Forst Zeitschrift fi.ir Waldwirtschaft und Umweltvorsorge, 50 (23): 1282-1286.
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