20.500.12556/RUL-59174 Možnosti razlikovanja velikega jesena (Fraxinus excelsior L.) in poljskega jesena (Fraxinus angustifolia Vahl) na osnovi morfoloških znakov The possibility of distinguishing the Common Ash (Fraxinus excelsior L.) from the Narrow-Leaved Ash (Fraxinus angustifolia Vahl) based on morphologic traits V Sloveniji uspevajo tri vrste jesenov: mali jesen (Fraxinus ornus L.), poljski jesen (Fraxinus angustifolia Vahl) in veliki jesen (Fraxinus excelsiorL.). Morfološko razlikovanje tesno sorodnih velikega in poljskega jesena je težavno, še zlasti na rastiščih, kjer se pojavljata skupaj. Največkrat uporabljeni, vendar zaradi velike variabilnosti pogosto nezanesljivi razlikovalni znaki so listi in brsti. Uporabnejši razlikovalni znak je oblika socvetja oziroma oblika soplodja, pri določanju vrst pa dajemo prednost hkratni uporabi različnih morfološki znaki. Pogosto zamenjevanje obehvrst v praksi je tudi glavni razlog za nezadostno poznavanje njune razširjenosti v Sloveniji. There are three ash species native to Slovenia: manna ash (Fraxinus ornus L.),narrow-leaved ash (Fraxinus angustifolia Vahl) and common ash (Fraxinus excelsior L.). Based only on morphological traits it is difficult to distinguish between closely related common and narrow-leaved ash, particularlyon sites where the two species are sympatric. Leaf and bud characteristics are mostly used as distinguishing features. However, they are highly variable and therefore in many cases unreliable. The type and size of the inflorescence are considered the best morphological traits for the separation of these two species. On the other hand, it is recommended to use as many different morphological traits as possible for determination. Incorrect identification of the two species is the main reason for inadequate knowledge about their geographic distribution in Slovenia. veliki jesen Fraxinus excelsior L. poljski jesen Fraxinus angustifolia Vahl morfološka identifikacija Common ash Narrow-Leaved ash morphological identification true false false Zveza društev inženirjev in tehnikov gozdarstva in lesarstva Slovenije Slovenski jezik Angleški jezik Znanstveno delo 2015-07-10 18:21:48 2015-07-10 18:21:48 2022-07-05 03:41:44 0000-00-00 00:00:00 2007 0 0 Str. 173-179 št. 3 Letn. 65 2007 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*164:630*17(045)=163.6 0017-2723 1874854 3736834 http://www.dlib.si/details/URN:NBN:SI:doc-KV43OOBO 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=59185 Biotehniška fakulteta 0 0 0