DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 11-12/1963 str. 32     <-- 32 -->        PDF

mena, osnivanja i održavanje šumskih rasadnika na samom radilištu, obrada
i priprema tla i održavanje korova u šumi, presadnja školanih sadnica u sastojim
itd.


Investicije potrebne za te radove nalaze puno opravdanje u rentabilitetu
koncentracije sječina i produkciji kvalitetne drvne mase.


Ovim je obuhvaćen prvi elemenat razmatranja same provedbe radova na
regeneraciji šuma, dok će se račun rentabiliteta, koji je vezan u taj rad iznijeti
u drugom dijelu ove radnje.


REGENERATION OF BEECH SELECTION FORESTS
OF UPPER MOUNTAIN AREAS


SUMMARY


The problem of regeneration of Beech selection forests of upper mountain
regions was dealt with by a comparative method, i. e. for the same forest type
(after Dr. I. Horvat: the upper zone of Beech forest with Fir = Fagetum abietetosum,
and the mountain Beech forest = Fagetum subalpinum) on limestone parent rock,
altitude 1100—1300 m., there were chosen for the study two forest complexes of
almost the same standing volume, composition, and site quality, viz.:


Jelenje (120 ha.) with 244 cu. m./ha., in which 83% Beech, and 17°/» Fir


and Spruce.


Platak (159 ha.) with 237 cu. m./ha., in which 81"/» Beech, and 19% Fir


and Struce.


In the forest district of the Jelenje (open forest) were carried out the fellings
of greater intensity, while in the Platak district (hitherto unopened forest) only
single trees were cut.


The marking of matured and defect trees was carried out in both districts, and
the following intensity of felling was obtained:
Jelenje: 20i!)/o Beech, l8/o conifers (Fir and Spruce), in total 20%,
Platak: 24% Beech, 2´% conifers (Fir and Spruce), in total 20%.
Although the intensity of felling was in both districts the same, the proportion
of assortments was different, viz.:
Jelenje yielded 32% of industrial wood;
Platak yielded 3% of industrial "wood.
A successful regeneration of these forests can be achieved by applying
continuously a felling intensity of 2,5—30%.


The single tree selection method which so far has been applied to these forests
could not offer even under a 25—30% felling intensity an increase of proportion
of conifers because with this method of felling there remained the same composition
of tree species although an increase in quality is achieved.


The desired increase of proportion of coniferous species in these forests can be
achieved under a 23—30% felling intensity, and this only by applying felling in
circles or strips, whereby are created conditions for a more vigorous development
of conifers.


By the mentioned method of management — in so far as one does not take
care of the time of felling with respect to the mast fall of Beech and conifers —
one does not achieve an increase of conifers. This increase can be achieved only
by a heavier felling outside the time of Beech mast fall.


The opening of suitable larger or smaller areas by felling in circles or strips
runs the hazards of a better or worse natural regeneration, especially within the
period of searching for the best method of working, and a beating up fwith fresh
sowings, or plantings of conifers ´will be a regular work in this forest.


From this method of management should be excepted those forest areas in
which because of the condition of the soil one should continue applying the single
tree selection method.