Agronomy Science, przyrodniczy lublin, czasopisma up, czasopisma uniwersytet przyrodniczy lublin
The aim of the study was to determine the effect of the gap size on the growth of pedunculate oak in two forest habitat types (fresh mixed coniferous forest BMśw and fresh forest Lśw). The research was carried out in the Świdnik Forest District. Measurements were made for 12, 20, 25, 50 ares gaps. The growth traits were measured on the designated sample plots and the habit form of the crown and slenderness coefficient was assessed.
The results of the research show that the growth traits of oaks within gaps differed between the analyzed habitats. In each case, the higher trees were found in the Lśw habitat. Correlation analysis showed a significant relationship between the gap size and the height of the oaks growing in them. The Spearman correlation coefficient for the Lśw habitat was 0.301, and for the BMśw habitat 0.695. In both habitats, the highest growth was achieved by oaks on gaps of 20 and 25 ares sized. Taking into account both parameters it can be stated that the most optimal growth conditions are in middle size gaps.
Regardless of the habitat and the gap size, the artificial regeneration oaks growing in the eastern and central part of the gaps was characterized by the highest height. The results of the research on the habit form in both habitats indicate that almost half of the trees were oaks with broad-crowned crowns. The remaining forms accounted for about twice less trees.
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