DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 11-12/1979 str. 90     <-- 90 -->        PDF

year, respectively 94,2% of annual increment is cut. On the basic of typological
investigations approximately 10"´" of annual cut is exploited by using the group
selection method. The size of circles was from 0,2 to 0,4 ha and if there were
not enough young plants (fir, spruce, beech), seedlings of spruce were used. That
method had been favourably estimated to both the regeneration and the increased
increment (which on similar areas made 1,8—2,53"´«, whereas the average
of the entire enterprise made 1,9%). The current volume increment on site quality
1. amounted to 16,0 m3 per ha in 1978.


Eng. G. Petrovi ć presented the application of group selection method in
the area of Novi Vinodolski Forest Office. He established that the method was
cheaper for the exploitation, i. e. felling of the old stand. The final balance, however,
was not positive, because of the expenses incured by spruce planting on
insufficiently regenerated cutting areas. In one such case the spruce had to be
planted on 20 ha of the 32 ha in total, which made about 601/» of the cutting
area.


Dr. V. Hre n spoke about regeneration of all-aged forests from the standpoint
of typological investigations, emphasizing the significance of the light for
regeneration.


Discussing the potential possibilities of forests of Forest Enterprise Ogulin
Dr. D. Cesta r stated that the amount of the present production was only 53%
of the normal, and that only 50% of the site potential had been used.


Eng. D. Böh m discussed the selection forest management from the standpoint
of the nature protection service and shared the opinion of wider profes*
siona! circles that group selection method with a clear cut of 0,2—3,0 and more ha
should not be applied in the forests of the region. However, to reach the final
decision further investigations on the consequences of such management are
needed, keeping particularly in mind that only spruce had been used to fill up
bare spots so far. Although this species is indigenous in that area, it is not
dominant and therefore would influence the landscape and change ecological
relations as well.