Assessing the Importance of Biotic Factors in Tree Development

  • Constantin ȘULEA Faculty of Agriculture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 3-5 Manastur St
  • Ioan OROIAN Faculty of Agriculture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 3-5 Manastur St
  • Ilie COVRIG Faculty of Agriculture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 3-5 Manastur St
  • Ioan TÄ‚UT Faculty of Agriculture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 3-5 Manastur St
  • Petru BURDUHOS Faculty of Agriculture, University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca, 3-5 Manastur St
Keywords: oak, deforestation, defoliation

Abstract

Severe  worsening  of  the  phytosanitary  status  of  forest trees  was  reported  in  last  years, mainly  due  to  the  climatic  conditions,  low  biological  resistance  of  trees,  and  forest  management mistakes. The  main  aims  and  objectives  of  this  paper  are  to  emphasize  the  effect  of  harmful  biotic factors  in  different  phases  of  tree  development. The  trial  was carried  out  under  the  Forestry  Office Satu Mare, on an experimental area located in the Forest District of Satu Mare, on 0.25 ha. It consisted in  two  parts,  one  containing  the  25  years  old  oak  with  second  production  class,  and  the  other containing  the  25  years  old  hornbeam  with  third  production  class.  In  oak,  31%  have  dried  thin branches, over 20% have the entire crown dried, and 15% present the same symptom but with a less than  20%  intensity.  In  hornbeam,  7%  of  trees  present  crown  dryings,  thin  branches  below  20%  or thick dried branches between 1 and 5 %.
Published
2013-11-25