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Vliv stanoviště a velikosti holiny na odrůstání kultur douglasky tisolisté
Karlíček, Josef
This thesis aims to determine an impact of size (coverage) of regeneration element, type of the planting stock used, trophic state of the site and time of planting on growing out of the Douglas fir plantation. In total, three plantations (two in spring and one in autumn) were carried out at six different sites. For each plantation, about 100 bare-root plants and about 100 containered plants were planted at each site. In autumn of 2013 (after ending the plant increments), length of the part above ground, the last increment of the apical part and branch, thickness of the root collar were measured for all plants planted (about 3,600 plants in total); further, number of live branches on the stem, length of branches with needles, shape of the stem, occurrence of branch increment this year, colour of needles and length of needles were determined. In addition to this, damage to plants and the overall health condition of the plants were evaluated. Subsequently, statistic evaluation was carried out according to individual sites. The results showed if the plants are not damaged significantly (in particular by frost and pine weevil), then, regarding the trophic state, the nutrient sites are more preferable for Douglas fir cultivation. Regarding the size of clearing area or regeneration element coverage, underplantings and small sheltered clearing areas are very suitable for establishment of Douglas fir plantation. For spring planting, bare-root planting stock is best to use; for autumn planting, the containered planting stock shows to be better to use. Furthermore, it was found time of planting has no significant impact on the plantation growing out for spring planting; on the contrary, the autumn planting can be assessed positively. Douglas fir was also confirmed to suffer late spring frost frequently on the large open clearing area, resulting in decreased increment in a given year and negative influence on the overall health condition of the plants. In addition, damage to plants caused by pine weevil cannot be neglected.
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Vliv stanoviště na růst douglasky tisolisté
Karlíček, Josef
The aim of the study was to determine the effectsof the growth the cultures after the first growing season size (coverage). Especially in terms of:a regeneration element, a type of planting stock, fertility habitat and a time of planting. In total, the three plantations were carried out (two spring and one autumn) at six different sites and the only first two were evaluated in this study. 100 seedlings cover-rootedand approximately 100 seedlings bare-rooted were planted at each planting date. In autumn (after the increment of seedlings) there were measured:a length of the herbage, an annual increment and terminal branches, a thickness of aneck root, anumber of live branches on a trunk, branches with needles length, astrain shape, an occurrence of aannual increment branches, a needles color and alength of needles; at a total of about 2,400 individuals. There was also rated adamage of seedlings and an overall health of the planted plants. Subsequently, the statistical analysis was performed according to the particular sites. The results show that the increment of seedlings most affects frost damages, so it is unsuitable for planting large and uncovered clearings. On the contrary, the best results were obtained in underplantings and small clearings. The evaluation also shows that better results are achieved withbare-rootedplanting material. The favorable sitesfor Douglas firfrom the perspective of fertility arethe breeding sites. After comparing early and late spring planting, we can conclude that the time has not significant impact on the growth of the seedlings.
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