prilagođeno pretraživanje po punom tekstu

ŠUMARSKI LIST 4-6/1975 str. 13     <-- 13 -->        PDF


Determinat nion of the most suitable tree species and methods of reconstruction of
devastated areas (trough dying of Pedunculate Oak (Quercus robur L.)

The autor performed a reforestation on the experimental plots, which he
selected in the area of the heaviest drying up of Pedunculate Oak in the management
unit »Žutica«. The reforestation was carried out in 1970. On 36 experimental
plots (9 variants and 4 replications) the author performed reforestation
bö means of the following specias: White Willow (Salix alba) European-American
Hybrid Poplar (PxE clone 1-214 and PxE clone 1-154), Black Alder (Alnus glutinosa),
Pedunculate Oak (Quercus robur), Field Ash (Fraxinus angustifolia), Oriental Plane
(Platanus orientalis).

In 2 localities of the experimental plot were placed probes for the measurement
of fluctuations of the groundwatertable at the relatively highest and lowest
woinst of the terrain (98,9 and 97,6 m respectively).

The results demonstrate that it is very difficult, almost impossible, to reestablish
immediately the devastated areas with autochthonous species, except with
Black Alder. Worsening of the hydrological regime (dislappearance of forest trees
as a natural pump for water through transpiration), and changes in the biologycal
component of the soil (all of which influences a whole series of changes in the
microsystem) suggest that there should first be created ecological preconditions
in order to recultivate such areas with those forest tree species which had earlier
formed the stands (Q. robur and Fr. angustifolia).

Among the autochthonous species Black Alderand White Willow can serve
as pioneers and transitional speciel, also the European-American Poplars. Their
lifetime on such grouds is brief, which should be taken into account.