broj: 3-4/1996        pdf (28,4 MB)



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Znanstveno-stručno i staleško glasilo
Hrvatskoga šumarskoga društva
Journal of Forestry Society of Croatia
      Prvi puta izašao 1877. godine i neprekidno izlazi do današnjeg dana
   ISSN No.: 0373-1332              UDC 630* https://doi.org/10.31298/sl
upute autorima
WEB EDITION
ARHIVA ČASOPISA


HRČAK


 
ORIGINAL SCIENTIFIC PAPERS
     
Matić, S., Oršanić, M., Anić, I. UDK 630*221.4.001
Some Features and Problems Concerning Silver Fir (Abies alba Mill.) Selection Forests in Croatia     pdf     HR     EN 91
Summary: The fir (Abies alba Mill.) selection forests in Croatia cover
29% of the total forested area, or 540 641 hectares.They have a wood volume
of 102 203 300 m3, of which 30 975 420 m\ or 30%, belongs to the fir. The
remaining 70% of the mixture is mostly the common beech (Fagus sylvatica
L.) and, to a lesser extent, common spruce (Picea abies Karst.) and other deciduous
trees. The economic and general functions of these forests have a very
high value. The general functions are reflected in a number of social and ecological
functions. An ideal selection forest structure consists of trees of different
heights and thicknesses per surface unit, where a normal amount of growing
stock is distributed in the selection structure, providing highest increment,
optimal natural regeneration and stability.

The fir selection forests of today are marked by a disturbed, often extinct
structure, causing a series of changes, some of which are:

-inadequate or completely missing natural regeneration of the fir;
-increase or decrease of normal wood volume, leading to reduced increment;
-ageing, physiological weakening, and dieback of dominant trees; in 1992,
20.4% of the tree crowns were damaged by 60%; in 1993, thisfigure was 15%,
in 1994 it was 15.2%;
-negative impacts of acid rain and other pollutants of air, water and soil;
-changes in the stands microclimate;
-the degradation of forest soil caused by weeds, lessened microbiological
activity, erosion and raw humus deposits; the occurrence of secondary pests which quicken the tree dieback;
-aggressive beech expansion into the fir territory, especially in southern
rocky expositions and southern edges of the fir areal, combined with artificially
increased proportion of spruce-trees.
All the factors mentioned above are contributing to the negative trends in
the selection forest development in Croatia, the causes of which can be classified
in three groups:

a) The application of improper silvicultural measures, especially as to the
felling cycle, the intensity and felling methods.

b) The appearance of long dry periods in the global climate.

c) Adverse impacts of acid rain, air, water and soil pollutants.

Acting simultaneously, some of these factors cannot be influenced. We should
therefore apply adequate silvicultural methods to form structures capable
of overcoming the negative impacts.

Key words: selection forest, structure, regeneration, felling cycle, normal
structure.
Key words: selection forest; structure; regeneration; felling cycle; normal structure
Hrašovec, B., Margaletić, J. UDK 630*449 : 323.3.001
Seed Pests and their Impact on Reforestation Efforts in Croatia     pdf     HR     EN 101
Španjol, Ž. UDK 502.7.001
Environmental Protection in the Republic of Croatia     pdf     HR     EN 107
Borzan, Ž., Idžojtić, M., Guttenberger, H. UDK 630*165.42.001 (Picea omorika Panč.)
Research on the Standardization of Gymnosperm Karyotypes using Picea Omorica as an Example     pdf     HR     EN 121
Sever, S. UDK 630*31+903+681 (497.13).001
Some Experience in the Attempt to Define Logging Strategies in Croatia, a Country in Transition     pdf     HR     EN 133
Horvat, D., Sever, S. UDK 631*352.5+319.4 : 630*232.326.2+236.9 : 631*072.16.001
Mulching Flail Mower - one Method for Mechanization of Stand Establishment and Treatment Operations     pdf     HR     EN 143
Krpan, A. P. B. UDK 630*379.001
Problem of Skidding Timber in Croatian Lowland Forests     pdf     HR     EN 151
Horvat, D., Sever, S. UDK 630*375.M--015.2 (234.5) : 630*377.2.001
Some Properties of the Skidders Used Mountain Forest Stand Thinning     pdf     HR     EN 157
Goglia, V., Horvat, D., Risović, S., Sever, S. UDK 332.14.839.31+861.0.001
Past and the Future of the Forest Biomass Utilization in Croatia     pdf     HR     EN 163
Kušan, V. UDK 630*587.001
The Approach to Remote Sensing and GIS in Croatian Forestry     pdf     HR     EN 171
Tomanić, S. UDK 630*689.001
Choise of Subject of Research in Forest Operations     pdf     HR     EN 179
Goglia, V. UDK 630*362.7-015.21(083.7)001
Parameters Influenting the Vibration Level of Portable Chain Saw     pdf     HR     EN 187
Goglia, V., Beljo, R. UDK 630*822.34:621*935+9.02.001
Lateral Movement of the Band Saw Blade and Machine´s own Resistance Power in Relation to the Strain Force     pdf     HR     EN 195
Korpel, Š. UDK 630*228.81+221.4.001
Development and Strukture of Beech-Fir Virgin Forests and their Application to the Selection Forest Management     pdf     HR     EN 203

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