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ŠUMARSKI LIST 5-6/1986 str. 17     <-- 17 -->        PDF

LITERATURA


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Vegetational and Structural Traits of Phytocoenosis of the Common Birch (Betula
pendula Roth) on the Psunj Mountain


Summary


The daily growing need for pulpwod as a rew material for the production of
paper has resulted in a tendency in Croatia to pay greater attention to the investigation
and silviculture of the common birch; wood which is in great demand.
This paper presents the investigation results on the possibility of raising this culture
in the management unit Zapadni Psunj. In this management unit the Phytocoenosis
Betulo-Quercetum petraeae illyricum Fuk. in 1959 covered a surface of
approx. 500 ha, whille a further 350 ha are today overgrown with brush-wood,
which is also quite suitable for raising birh stands. The average volume of woel for
birch stands amounts to 158 n>"> per hectare, with a mean annual increment
of 4 m:>.


Figs. 1 and 2 Present the appearance of the birch stands today.


Graph. 1 Presents the height curve for the common birch in the management unit
of Zapadni Psunj.


Graph. 2 Presents the distribution of the number of trees (N ha) and wood volume
(M,ha) by diameter three expermiental plots for the birch (1). sessile-flowered oak
(2). other species (3) and altogether (4).