DIGITALNA ARHIVA ŠUMARSKOG LISTA
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|ŠUMARSKI LIST 9-10/1973 str. 75 <-- 75 --> PDF|
K a u d e r s, A. (1959): Hrvatska, povijest šumarstva, Šumarska enciklopedija,
Martinović , J. (1972): Zavisnost stepena humizacije od stanišnih uslova u
šumskim tlima na Karstu Zapadne Hrvatske. Disertacija.
Š a f a r, J. (1965): Pojave proširivanja bukve na D´naridima Hrvatske. Separat
Šurić , S. (1931): Privredni plan gospodarske jedinice Plješivica, Dokumentacija
šumskog gospodarstva Gospić.
Überla , K. (19688): Faktorenanalyse. Berlin.
INFLUENCE OF SOIL AND TOPOGRAPHY ON THE PROPORTION OF TREE
SPECIES IN THE BEECH/FIR FOREST IN THE KARST AREA
OF WESTERN CROATIA
By applying the orthogonal factorial analysis was investigated in a trial the
effect of the soil and topography on the proportion of tree species in the Beech/Fir
forest (Fagetum croaticum ab etetosum Horv.). The investigation indued 125 sample
plots on brown soil on limestones and 82 sample plots on lessive soil on
limestones. The natrix of input data contained: the depth of At Horizon, %> of
humus, C/N ratio, pH in H>0 and °/o of clay — all in Ai Horizon, total depth of
soil, altitude, aspect (values of characteristics increase from N over E and W
towards S), slope, shading of the soil by crowns in %> of the shaded area, proportion
of tree species by volume of stems and the growing-stock volume expressed in
m3/ha (Tab. 1).
The results presented in Tab. 2 and Fig. 1 were achieved by the model of the
orthogonal factorial analysis (taken from the textbook: Mathematical methods for
digital computers, chapter 7, New York 1962). The author cautions that all the
established links are not a testimony of the causes of the variability of the species
proportion. This refers especially to the shading of the soil by crowns and the
growing-stock volume. It proved necessary to continue investigations and to process
a greater number of matrices of input data. Although it is not yet possible to draw
a conclusion regard ng the main question, the results obtained may help in planning