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Vliv buřeně na odrůstání kultur douglasky tisolisté
Miksánek, Ondřej
The aim of the study was to determine the influence of weed growing up on Douglas fir cultures using different methods of protection against weeds. There were used several methods as: whole surface trimming, trimming in stripes, individual trimming, trampling, whole surface herbicide application, trimimming the grass blades to a height level. As a control area was chosen an area with no treatment against the forest weeds. The research was carried out on forest property LHC Horáková, set of forest types 5H. In the spring of 2012 was established a research area, which was divided into seven parts, each part for a different kind of protection against forest weeds. On each plot were planted approximately 200 individuals of Douglas fir. For seedlings were evaluated the following criteria: length of the aboveground parts, terminal increment, replacing of the terminal shoot by lateral shoot, thickness of the root collar, the occurrence of tress with fork trunk shape, multiple top, trunk straightness, canopy shape, color of needles, length of needles, crown base height and damage of tree by biotic and abiotic factors and total losses. There was also examined the effect of treatment against weeds on soil moisture, sunlit of seedlings on individual plots, the species composition of weed on individual plots and the influence of different intervention against weeds on the chemical composition of the assimilation apparatus. It was found out that Douglas fir exibits the greatest terminal increment on area without treatment, and after three years of research achieving an average height of 121.7 cm. But seedlings on this plot have weaker root collar (15.61 mm) and also have relatively high slenderness ratio. The strongest root collars are at the end of the research identified on a plot with individual trimming - 19.71 mm, at the same time the seedlings have comparable terminal increment to that area without any treatment (119.7 cm). The least suitable way to protect against forest weeds after three years of research, was found out herbicides treatment, because it showed the worst results. The best way in contrary seems individual trimming.
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Monitoring zdravotního stavu douglasky tisolisté Pseudotsuga menziesii v oblasti Orlických hor
Tylš, Pavel
Douglas fir Pseudotsuga menziesii [Mirb.] Franco is a non-native species in the Czech Republic. This thesis should contribute to discussion about the advantages and disadvantages of using Douglas fir as a commercial tree species from the point of view of health condition. A component of the thesis is monitoring the health of Douglas fir in 15 stands on LS Rychnov nad Kněžnou, where Douglas fir grows in mixture stands with spruce Picea abies. A comparison is made between Douglas fir and spruce. Several originators of degradation of health condition were found in stands. No signs of deterioration in health condition were found in 40% of stands. The most frequent species was dark honey fungus Armillaria ostoyae and cooley spruce gall adelgid Gilletteella cooleyi. Rhabdocline needle cast Rhabdocline pseudotsugae was proven only in two stands. The Swiss needle cast Phaeocryptopus gaeumannii has not been proven at all.
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Využití krytokořenného a prostokořenného sadebního materiálu v nastávajících klimatických změnách
Mergl, Václav
The aim of this thesis is to evaluate the use of containerized and bare-rooted planting stock in the upcoming climate change. Four research areas at different sites in SLT 2S, 6K, 6S and 7K (Czech forest ecosystem classification) and in different climatic areas were chosen for this purpose. Furthermore three timber species for the research were selected, namely European beech (Fagus sylvatica L.), Norway spruce (Picea abies (L.) Karsten) and Douglas fir (Pseudotsuga menziesii (Mirbat.) Franco). 300 dormant individuals of the containerized and bare-rooted version of the chosen wood species were planted on each research area. 100 individuals of each variant in all species were measured after the growing season. Following parameters were measured on each plant: height of above-ground part of the plant, height of above-ground part of the plant at the time of the planting, shoot lenght, root collar diameter, crown width, length of the assimilatory organ, width of the assimilatory organ, trunk straightness, axis deflection of the trunk from the vertical axis. If trunk multiplicity occurred, the height of the trunk deployment was measured. Atributes such as color of the assimilatory organ, crown shape, type of loss or damage of the plant and the multiplicity of vertex were also observed. As a result it was found that it is necessary to maintain the natural tree species composition. Also it was revealed that the bare-rooted planting stock has a better survival rate on drier stands, precisely on SLT 2S. The SLT 6S, 6K and 7K were found to have better survival rate of the containerized planting stock. This finding indeed cannot be aplied at sites in SLT 6S and 7K where the beech had the same grow out rate.
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Porovnání růstu prostokořenného a krytokořenného sadebního materiálu
Souchová, Jana
The aim of the thesis was to compare and evaluate the growth of bare-rooted and rooted seedlings of the same tree species based on the findings. All trees compared and monitored in this work were planted in the same area of the cane, in 2016. The evaluation was carried out on 4 research areas, these areas are characterized by sets of forest types 2S (fresh beech oak), 6K (sour spruce beech), 6S (fresh spruce beech) and 7K (acid beech spruce). There are three species of woody species in these areas, namely Norway spruce (Picea abies (L.) Karst.), Douglas fir (Pseudotsuga menziesii (Mirb) Franco) and European beech (Fagus silvatica L.). On each plot, 100 individuals were subjected to measurement for each variant of planting material in the autumn of 2017, for which the following parameters were evaluated: losses, height of the overground part in 2016 (which was measured after the scar marking the last increment), height of the above ground part in 2017, increment in 2017, the length of branch growth in 2017, the width of the crown, the thickness of the root neck, the trunk deflection from the vertical axis, the length and width of the assimilation apparatus, the straightness of the stem, the vitality of the plant. Based on the results, the following conclusions were drawn: On the SLT 6K surface in the case of woody beech, the variant of planting material grew better. In contrast, barkless planting stock grew better in Douglas fir tree species. The Norway spruce tree then grew better in the rooted variant. In the overall assessment of the abovementioned factors, it can be stated that on the SLT 6K the rooted seedlings grow better. In the SLT 6S area, the species of beech was found to be better growing in the bare-root variant. The Douglas fir also grew better in the bare-rooted variant and Norway spruce was best grown in the rooted roots variant. The result is that the bare-rooted planting material grows better on SLT 6S. On the area of SLT 7K there was a better growth of the beech in the rooted variant, as well as the better overall results of the spruce in the openrooted variant. Douglas fir grew better on the area in the barefoot variant. To summarize the findings of the observation on SLT 7K, it can be stated that the better results are achieved and hence the growing of the rooted planting material. In the SLT 2S area, the results for the growth of beech wood were better in the bare-rooted variant; Douglas fir tree has not been evaluated for this area due to insufficient seedlings when setting up the research area.
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Porovnání růstu prostokořenného a krytokořenného sadebního materiálu
Petrů, Markéta
This work is about comparison of bare-rooted and containerized planting stocks on 5 locations with different conditions, which were established for the purpose of this kind of research. Locations consisted of these forest type sets: 4K, 4S, 5K and two areas with a forest type set 3K. There were 200 bare-rooted varieties and 200 containerized varieties of three species planted on these locations in 2016, namely European beech (Fagus sylvatica L.), Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) and Norway spruce (Picea abies (L.) Karsten). After the end of the vegetation period in 2017, measurements were made on the mentioned trees. Hundred individual trees from each variant were measured. The following parameters and features were measured: height of the aboveground part in 2017, height of the aboveground part in 2016, length of the growth of branches, thickness of the root neck, width of the crown, length and width of the assimilation apparatus, ripple of the trunk, diversion of the trunk, height of split of multiple trunk, colour of the assimilation apparatus, crown shape, multiple top, losses. The measurements were further statistically evaluated and the results showed that the containerized variant of European beech has better growth at all evaluated locations. Containerized variant of all plants was better on 5K area than on the other areas. Bare-rooted variant of Norway spruce had better growth on forest type sets such as 3K,3K B,4K, and 4S. Bare-rooted variant of Douglas fir had better results on 3K (Svárov) and 4K areas, but containerized variant had better results on 3K (Vanovice) and 4K area.
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