Growing space efficiency of European ash (Fraxinus excelsior L.) in the region of Majdanpecka domena
Stajić, Branko (Faculty of Forestry, Belgrade (Serbia)) | Vukić, Ksenija (The Ministry of Agriculture and Environmental Protection, Belgrade (Serbia). Forest Directorate) | Janjatović, Živan (Faculty of Forestry, Belgrade (Serbia)) | Kazimirović, Marko (Faculty of Forestry, Belgrade (Serbia))
This paper reports on the size and completeness of tree crowns and their effective- ness for the production of wood volumes in the case of a pure 35-years European ash stand. Starting from the interaction between the elements of the crowns structure and elements of the tree and stand growth the economical use of growing space was perceived and the optimal stand state was also defined, what were the main objectives of this paper. The trees with slender crowns, despite their better ratio of the surface area/volume of the crown, pro- duced lower wood volume (undeveloped crowns). On the other hand, when the produced stem volume was analyzed per unit growing space it was observed that the less space for tree growth the more effectively it was used for the production of wood volume. This indicated the existence of a certain optimum between the crowns and produced volume stands. The optimal stand state in terms of crown structure, the desired number of trees and stand volume was de- termined based on the relationship between the coefficient of the economy of growing space utilization and volume of trees and crown projection area.
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