Natural regeneration on post-fire area in Rudy Raciborskie Forest District
The study was conducted on post-fire area in Upper Silesia (Rudy Raciborskie Forest District). Its aim was to find out the growth and development pattern (species structure change) of spontaneous regeneration on different areas damaged by fire in 1992. Firstly, the area, distribution, species composition and changes of natural regeneration were described, than growth and vitality of spontaneous regeneration was investigated on 9 study plots (area of 100 m2 each) established in 2007. The total area of natural regeneration in the forest district in 1998 was 1512.19 ha. Birch was the main regenerated tree species in the forest division occupying 88% of burnt area. Ten years later the percentage of birch decreased to 36%. During that time the share of Scots pine spontaneous regeneration increased. The main regenerated tree species registered on the study plots established in 2007 was also pine. Its density ranged from 1,040 to 87,200 ha-1. Pine height and d.b.h. were significantly different between plots. The average height increment (2004–2006) was dependent on the site type. The lowest height increment was found on BMśw, and the highest on BMw. Pine trees were damaged by roe deer (tapping). The level of damage relayed on tree density on the study area.
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