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ŠUMARSKI LIST 1-2/1958 str. 16     <-- 16 -->        PDF

LITERATURA


Dragišić P.: Radovi na njezi mladika. — Obavijesti br. 6/55.
Dragišić P.: Uzgojni radovi prema Schädelinu. — Obavjesti br. 1 i 2/55.
Dragišić P.: Problem razvitka i njege mladika sastojina bukve i hrasta kitnjaka


u NRH. — S. L. 12/1955.
Klepac D.: Upotreba frekvencijske krivulje broja stabala pri »Opisu sastojina« —


Š. L. 1956 g.
Klepac D.: Frekvencija vremena prijelaza. — Š. L. 1955 g.
Smilaj I.: Uređivanje šuma u NRH. — Š. L. Zagreb 1955 g.


APPRAISAL OF STAND CONDITION AND INTENSITY
OF SILVICULTURAL TREATMENTS


Summary


The author explains a new graphic method for appraising the actual stand condition
as well as determining the tending operations in future to be applied in plantations
and young stands.


For this purpose was used the frequency of basal areas in stands in which it
was possible to measure the d. b. h., or the frequency of stems in plantations where
it was not possible to measure the d. b. h.


The frequencies of all basal areas (stems) were plotted along the Y-axis, and
the curve obtained was called »collecting curve«. Further, there were plotted along
the Y-axis also the frequencies of basal areas of those trees which by the shape of
their crowns and boles were graded as being good. This curve was called the »curre
of good trees«.


From the relationship between the collecting curve and the curve of good trees
there was appraised the condition of the stand and the intensity of silvicultural
treatment. If the relationship of the curves was as shown in Fig. 7a, the condition
of the stand was estimated as good, the relationship of the curves as represented
in Fig. 7 c as poor.


The portion of the stand appraised as dangerous for the trees was marked in
the graphs with slanting parallel lines, the intensity of thinning regime with vertical
parallel lines.


The aim of the article is to contribute to more objective methods in the appraisal
of stand condition and intensity of silvicultural treatments in plantations and
young stand.


VELIČINA SLUČAJNE GRIJESK E KOD ODREĐIVANJA VOLUMNOG
PRIRASTA SASTOJINE POMOĆU IZVRTAKA UZ UPOTREBU TARIFA
Zavod za dendrometriju — Poljoprivredno-šumarskog fakulteta — Zagreb


Dr. ing. Borivoj Emrović


Volumni prirast jednog stabla u sastojini — može se izračunati pomoću
debljinskog prirasta i nagiba tarifne linije (Meyer [1], Lötsch [2], [3])


dV


Zx = Zi r~ = zT. f´ (x) (i)


(1 X


d V
{T, = volumni prirast, x.x = debljinski prirast, = f´(x) = derivacija