DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 9-10/1968 str. 14     <-- 14 -->        PDF

LITERATURA


Bertović S., Cestar D., Pelcer Z.: Prilog poznavanju proizvodnih mogućnosti
šume bukve s jelom (Fagteum croatioum abietetosum Horv.) na Ličkoj Plješivici,
Radovi Instituta za šumarska istraživanja Šumarskog fakulteta Sveučilišta
u Zagrebu, 1966.


Cesta r D.: Prirast i vrijeme prijelaza s obzirom na način gospodarenja. Šum. List,


1960.
Horva t I.: Vegetacija planina zapadne Hrvatske, Zagreb, 1962.
Klepa c D.: Tablice postotka prirasta, šum. List, 1954.
Klepa c D.: Istraživanje debljinskog prirasta jele u najraširenijim fitocenozama


Gorskog Kotara. Glasnik za šumske pokuse, Zagreb, 1956.
Klepa c D.: Novi sistem uređivanja prebomih šuma, Zagreb, 1961.
Pranji ć A.: Interpolirane Šurićeve jednoulazne tablice za jelu-smreku i bukvu,


Šum. List, 1966.


AN INVESTIGATION INTO THE INCREMENT OF SILVER FIR WITH RESPECT
TO ITS BIOLOGICAL LAYERS IN FOREST ASSOCIATION OF SILVER
FIR WITH HARDFERN (Blechno-abietetum Horv.)


Summary


In this work were used data from two sample plots siluated in the Gorski Ko´tar
region (management units »Tuhobić« and »Sušica«) wich were laid out within the
framework of investigating forest types and sites, carried out by the Department
for Forest Ecology and Typology, Institute for Forest Research, Zagreb. Stems were
classified into three layers, i.e.: I-dominant, where crowns are completely illuminated;
Il-codominant, where crowns are only illuminated from above; Ill-dominated,
where crowns are only receiving diffuse light. From the data obtained it
follows;


—
that the mean stand increment (zs) is highest in layer I, smaller in layer II, and
smallest in layer III (see Tab. 6);
—
that the recruitment time interval jointly computed for layers I, II and III on
plot I is 16.1, and on plot II 18.7 years. The recruitment time calculated for
layer I on plot I is identical in all diameter sub-classes, while on plot II this
time interval is 6 years;
—
that the mean increment percent and the volume increment per ha. are highest
in layer I, smaller in layer II, and smallest in layer III (see Tabs. 5 and 6);
—
from what has been said it can be concluded that by adopting the group selection
system — where this is permitted with regard to the ecological conditions
— we are able to augment the increment in uneven-aged stands, because this
system of forest management makes possible creating stands in which the
highest stem numbers are found in layer I.