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V. Ki-cjči i T. üubmvac: OBNOVA I´ANJAČA HRASTA CRNIKH (Quercus ilex L.) OPLODNOM SJEČOM Šumarski list br. 11 12, CXXIV (2000), 661-668
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SUMMARY: Management coppice forests of evergreen oak (Quercus ilex L.)
which are under the management of Public enterprise "Hrvatske šume " occupy
an area of 10 169 ha. Clear feeling in these forests has been cancelled and rotation
of 80 years prescribed, which is a period in which coppice forests have to be
naturally converted into seed forests.


This paper emphasises the problems which occur during natural regeneration
of evergreen oak forest by transformation into a higher stand form, i.e. into stabile
productive seed forest.


The experiment was established and the first measurement carried out in autumn
1997 on the territory of Forest management unit Buzet, Forest enterprise
Pula, Management unit 7la, following the thinning (regeneration felling) in preserved
evergreen oak coppice forest during the winter of 1996/97, which restated
in the decrease of crown soil cover to 57%. Measurement of young crop indicates
to a highly satisfactory number of 83.600 units of young plants of evergreen oak
per hectare, up to 30 cm of height. However, already in the first year following the


Jelling there were numerous and, considering the height, dominating coppice
shoots of evergreen oak, of which 68 % were in a height class 30 cm and higher in
this initial year. In addition, even more aggressive coppice laurel appeared, so in
the first year, in both species, there were shoots higher than 150 cm.


Measurement carried out in 1998 showed that only 2 %> of evergreen oak trees
grown from seed, grew into height class of 31-60 cm. In the third year following
the thinning, 10% (8750) of evergreen oak young crop belonged to 31-60 height
class, which is an indication of the possibility of accomplishing the desired aim stabile
seed forest of evergreen oak. At the same time, coppice shoots of evergreen
oak (87 %>) were higher than 30 cm and the same happened with coppice shoots of
laurel. The share of bushes in overall woody population in 1997, 1998 and 1999
was 23%>, 31 % and 40 %o, respectively. The condition of young crops of evergreen
oak grown from seed and coppice on control, un thinned plots points to the fact
that crown soil cover of 85 % and more is a limiting factor of growth.


Based on the measurement results, it can be concluded that the principle of regeneration
felling, regarding the level of soil preservation and considerably frequent
seed production, gave positive results. Measurement results point to a big
problem of further survival of young crop of evergreen oak grown from seed, due
to higher share of bushes and coppice shoots. We have to point out to the necessity
for intensive care, which is a precondition for accomplishing the ultimate goal


- seed forests of evergreen oak.
Key w o rds : natural regeneration, seed felling, young crop, evergreen oak,
laurel.