DIGITALNA ARHIVA ŠUMARSKOG LISTA
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K, Pintarić: ANALIZA STRUKTURE I KVALITETE PRIRODNOG MLADIKA CRNOG BORA Šumarski list br. 5-6, CXXI ( 1997), 215-224 LITERATURA: 1. Hilf, H. H. (1967): Der Einfluss gesetzmässiger 5. Leibundgut , H. (1984): Die Waldpflege. III iz- Entwicklung der Verwertung des Nadelrundhol- danje, Bern-Stuttgart. zes auf diezukünftige Zielszeitung bei Waldbau-6 Linder , A. (1961): Prognose für Holzverwertung liehen Massnahmen insbesondere im Mitteleuro- un d Holzverwendung. Forstarchiv, 39. Jahrgang, pa. XIV IUFRO Kongress, sekcija 23, München. Heft § 2. Izetbegovic, S.( 1977): Strukturno-morfološke i 7. Pintarić, K. (1969): Njega šuma, Sarajevo. uzgojne karakteristike guštika jele u bukovo-je-0 r> -T^T^ U a -KM I r< 6 J JJ ,. v , . ,? . _ , 8. Pintarić, K., Izetbegovic, S., Mekic, F. lovim sumama na kiselim supstratima Centralne ,,„„, , „ , _ _ , . X, „V . T (1983): Proučavane metoda ovnove i n ege Bosne. Radovi Šumarskog fakulteta i Instituta za „ , . , .. . , ., x . - , ,. . A vvnntm i suma hrasta kitnjakai borova. Šumarski fakultet, šumarstvo u Sarajevu, god. XXII (1977), knjiga Sarajevo. 22, sv. 3-4. Weber , E. (1972): Grundrisse der Biologischen 4. Kramer, P. -Kozlowsky,T. (1960): Physiology Statistik. 7. Auflage, Stuttgart. of Trees, New York, Toronto, London. SUMMARY: The shading impact of the parent stand tree crowns on the development, structure and quality of natural young growth has been investigated in the young growth (upper height about 2 m) of the natural Black Pine stand (Pinus nigraj, where wood is being exploited in the tree-by-tree way. The research was done on the test plots in which neither felling has been done for the last 15 to 20 years, nor the young growth tended. After the process of natural regeneration under the canopy of the parent stand has been initiated, a special regeneration period in the pure Black Pine stands should not last longer than 10 years, while the final cut should be carried out when the natural young trees reach the height of 0.5 m. Only exceptionally, if thicker trees are desired, some 15 to 20 trees of best quality should be left per one hectare, in which case these trees would be felled at the end of the second production period (rotation), in order to avoid the damage on the trees in the regenerated stand. The distance between these preserved specimens would be some 20 to 25 meters. Thus would an additional volume increment be obtained. An analysis of a naturally grown young black pine forest, in which tree-bytree cuts have been applied, has shown the following: 1. On cambisols, developed upon gabbros, natural regeneration is going on well, both under the protection of the tree crowns of the parent stand and by sideways gush of seeds (at about 2 to 3 tree heights of the parent stand). 2. As the Black Pine requires much light, a special regeneration period should not last longer than 10 years, or the height of the natural young growth should be about 0.5 m. 3. The average height of the young trees, depending on the shade degree, vary between 159 cm (the highest shade ) and 188 cm (the young tree has developed in full light). The upper heights ranged from 202 and 229 cm. Those young trees that had developed under the tree canopy, have decreased in growth in the last three years, while the ones with less shade displayed a tendency of increase. This conclusion has also been made as to the increment. 4. In the last four years, the least average height increment has been established with the highest degree of shade (9.8 cm), while the highest increment was achieved at full light (32 cm). Accordingly, three times higher increment has been established with full light. |