1565 KB40 KB201320252016Čufar, KatarinaHabjan, PrimožMerela, Maksštevilka:110str. 3-13ISSN:2335-3112COBISSID_HOST:4679334URN:URN:NBN:SI:doc-PH038CZHslBiotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vireBiotehniška fakulteta, Oddelek za lesarstvoGozdarski inštitut Slovenije, založba Silvae SlovenicaActa silvae et lignibeechbukevcambiumcrown injuryFagus sylvaticaice stormkambijksilemnastajanje lesapoškodbe krošnjeTrephorwood formationxylemžledolomNastajanje ksilemske in floemske branike pri bukvah, poškodovanih v žledolomu| Formation of xylem and phloem in Europena beech tree after ice storm damage|After the severe ice storm in 2014, numerous damaged trees were not removed from forests. Due to the lack of general knowledge about the processes occurring in damaged trees, a study involving 14 European beeches was conducted in the Arboretum Volčji Potok. Trees were categorized by crown injury; injury class K % undamaged, A % damaged less than 50 %, B % damaged between 50 and 75 %, and C % damaged more than 75 %. During the 2014 growing season, micro-cores were collected every fortnight using a Trephor tool. Changes in crowns were also observed and noted. Transverse sections of micro-cores were prepared and observed using light microscopy and an image analysis system. Xylem growth rings were 20 to 95 % narrower in damaged beech trees compared to the undamaged trees. Damaged trees also produced narrower phloem rings. The biggest differences in cambial activity in beech appeared between Class A and Class BPo žledolomu leta 2014 je v gozdovih ostalo veliko poškodovanih dreves. Ker znanja o nastajanju lesa in skorje v poškodovanih drevesih primanjkuje, smo v Arboretumu Volčji Potok opravili raziskavo vpliva žledoloma na nastajanje lesa in skorje na drevesih, ki so v žledolomu pretrpela poškodbo krošnje. Izbrali smo 14 bukev, jih razvrstili v 4 razrede glede na stopnjo poškodovanosti krošnje (K % nepoškodovana, A % do 50 %, B % med 50 in 75 %, C % več kot 75 % poškodovana krošnja). V dvotedenskih intervalih smo iz njih odvzemali mikro-izvrtke z orodjem Trephor. Iz mikro-izvrtkov smo pripravili preparate lesa, kambija in skorje in jih analizirali s svetlobnim mikroskopom in sistemom za analizo slike. Poškodovane bukve so proizvedle od 20 do 95 % ožje ksilemske branike kot nepoškodovane, manjši je bil tudi prirastek floema. Izmed štirih razredov poškodovanosti so se pri bukvi največje razlike v debelinski rasti pokazale med razredoma A in BTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaGozdarski inštitut Slovenije