DIGITALNA ARHIVA ŠUMARSKOG LISTA
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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 |