DIGITALNA ARHIVA ŠUMARSKOG LISTA
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.1. /die: 1´KOBLLMATIKA (iOSI´ODARENJA PRHHOKMM SASTO.I1NAMA BUKVI I .11 - L ]. ... Sumai^ki list br. 1 2. CXXVII (201)3). 11-26 Klepac , D. 1965: Uredivanje suma, Nakladni zavod Obicna jela u Hrvatskoj (Silver fir in Croatia), 2001. Znanje, Zagreb Akademija sumarskih znanosti, Zagreb, Hrvat- K o v a c i e, D. 1981: Raspodjela ucestalosti broja sta- ske §ume> Zagreb bala i drvne mase kao mjera unapredenja sum- Pranjic , A. i Lukic , N. 1997: Izmjera suma, Sveu ske proizvodnje u nekim prirodnim sastojinama ciliste u Zagrebu, Sumarski fakultet, Za hrasta luznjaka u Hrvatskoj, Zagreb, 1981 (diser- greb, 1997. tacija). Serdar , V. 1966: Udzbenik statistike, Skolska knjiga M a t i c, S. 1991: Njega suma proredom, Sumarski fa-- Zagreb kultet, Hrvatske sume, Zagreb Spiranec , M. 1975: Prirasno prihodne tablice (jela, M estro vie , S. i Fabijanic,G. 1995: Prirucnik za bukva, grab...), Sumarski institut Jastrebarsko, uredivanje suma, Ministarstvo poljoprivrede i Zagreb sumarstva Hrvatske, Zagreb SUMMARY: Mixed stands of silver fir and beech on Papuk (Abieti - Fagetum panonnicum Raits 1969) recently were management as regular forests, and regeneration was made in way of shelter wood cutting. Biological and ecological means of silver fir and beech point to possibility of doing management in selection forest way, wich will increase ecological stability and better use of soil and climate characteristics. Important participants of selection management are biological characteristics in forest associations of silver fir regenerates in smaller or bigger groups, very often under the beech trees and opposite, beeches are regenerated in groups under thin treetops of silver fir Silver fir can tolerate shade very good and photosynthesis is being made under high-frequecy of lower light waves. By /nullification of organic substance in stand, the layer of carbon dioxide is being made in height of forty centimeters which has good influence on growth of silver fir seedlings and young plants because reinforcement of assimilation and photosynthesis. Vertical structure of selection stand makes better use of assimilative tree surfaces for photosynthesis possible, and root zone is also optimally developted for better use of prodieing capability of soil. Results of higher ecological stability and biological sign of selection stands of silver fir and beech are optimal products of stem wood and equalized balance ofmenagement. As manage example of selection stand of silver fir and beech on Papuk we took forest compartment 56a in menagement unit "Zapadni Papuk II", on the surface of 15,10 hectares and with 60 % silver fir and 40 % of beech. According to Mayer "balanced selection forest" is the one were the course increase can be used over a period of time (for example rotation period of 10 years) so that there is always the same distribution of volume in stand. Liocourt discovered in 1898 that number of trees in selection forest redused from lower to higher diameter class by the law of geometrical line. Multiplication (q) of numbers of trees lower and higher diameter class is number higher than one (q > 1) and it´ s called Liocourts multiplication. For dominant high of trees of 33 meters and site class III by Suric and with Susmels coeficient for silver fir (q = 1,3408) and Collets for beech (q = 1,4154) normal number of trees and normal stand basal area for diameter classes have been calculated. According to Mayers function of thickness are calculated the functions for normal numbers of trees for silver fir and beech for forest compartment 56a, this way: |