Vliv buřeně a zvěře na odrůstání kultur douglasky tisolisté

The aim of this thesis was to discover the influence of weed and animals on growth of douglas fir cultures at the management-plan area Jindřichův Hradec. Two research areas with weed (Rubus idaeus (L.) and Calamagrostis epigejos (L.) Roth) were founded in 2011 at SLT 4K and 5S. Growth reactions of douglas fir were monitored on these areas, being it areas with weed left without any intervention during the whole vegetation period or areas with regular full-area weed cutting. The following criteria were evaluated: shoot height, root crown thinkness, growth, height of forked tree sprout, crown height, trunk undulation, branching regularity, number of branches, needle length and trunk shape, soil moisture, chemical composition of the assimilation apparatus and the impact of sunshine. Altogether 512 pieces of douglas fir plants were measured. The results show that douglas fir demonstrated higher height growths every year in areas without cutting than in areas with full-scale cutting, Root crown thickness at SLT 4K was also bigger in the areas with weed. On the contrary, cutting proved to have positive effect at SLT 5S and the root crown thickness was slightly higher here. Two areas, where the influence of animals was simulated, were chosen to find out what the impact of animals on douflas fir cultures growth is. 90 plants were measured in each area and terminal bud damage, terminal shoot damage and side branches damage were compared. A control group of 10 plants, that was left without any intervention, was chosen for comparison. Subsequently their regeneration was evaluated. From the results from measured values follows that douglas plants react to damage by animals with higher height growths which balance the growth length of not-damaged plants. Damage did not even significantly influenced the trunk shape, when all types of damages managed to maintain continuous trunk for minimum of 90 percent of plants in both stands