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Vliv velikosti a krytí holiny na odrůstání kultur douglasky tisolisté
Paukovček, Michal
The aim of this diploma thesis was to determine what influence has a different size (cover) of clearing on growing cultures after the third growing season, time of planting and a type of planting material. The reaserch was realized on clearings with dimensions 55 x 70 m, 25 x 70 m, in Podsadba and on a big Kalamitná clearing (4,4 ha). There were used four provenances with or without an adjustment of root system. 10 parameters and signs were measured and recorded on each individual tree. Observed values were statistically evalueted and written comment was added. The results of reaserch confirmed that minor restoration elements are more suitable for culturing Douglas Fir as they provide a favourable microclimate. In these areas are lower losses and plants show a greater increase in aboveground part. In terms of time of planting, the most suitable appeared in the early spring planting dates. The adjustment of root system before planting had a negative effect because treated seedlings had lower gain and the losses were on average higher.
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Vliv velikosti a krytí holiny na odrůstání douglasky tisolisté
Ludvík, Ladislav
The aim of this thesis was to determine what influence the varying size of clearing and cover of the stand has on the gradual growth of Douglas fir (Pseudotsuga menziesii /Mirb./ Franco). The evaluation of different types of planting material (2 + 1, 2 + 2, 3 + 0 and f1 + k1) on partially covered locations is part of the thesis as well. Examination was conducted on research locations ÚZPL established in year 2010 (17 locations) and 2011 (4 locations) in the forests owned by the city of Brno. The survey was conducted after the end of the vegetation period in the months of September and November of the year 2013. It is a follow-up survey of the previous measurements realized in the fall of 2012. On all locations at least 100 individuals were measured and evaluated. These are the variables and signs assessed -- the overall size of the above ground part (in years 2012 and 2013), quantity of growth in each year, the thickness of the root neck, number of plants with multitude stems, the deviation of stem (straight, up to three times the diameter of the stem and more than three times diameter of the stem), the shape of the tree-top (triangle, ellipsoid, round and one-sided) the length of needles, the colour of the assimilatory part (green, bright green and yellow), loss percentage. These results were confronted with results from previous years. The results of this master thesis proved, that different size (and cover) of clearing and the used planting material have influence on the successful planting and growth of Douglas fir cultivation. The Douglas fir seems to be growing more successfully on locations protected at least from three sides where the width of clearing is no more than 35 metres. If quality planting material is used, low mortality of the plants can be expected as well. Aproximately after three years the quantity of growth and the thickness of the root neck on different locations start to match. On the locations protected from two sides and with the distance of the clearing from the stand not above the 1,5 multiple of the stand height, the covered-root plants (f1 + K1) and plant type 2+1 was proved to be most successful in growth and suffered from minimal loss even after three vegetation periods. The losses which occurred in 2013 were comparably lower to those in 2012.
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Vliv velikosti a expozice holiny na růst kultur douglasky tisolisté
Janoušková roz. Schindlerová, Hana
The aim of the study was to determine the effect on the growth of the cultures after the second growing year (coverage) and exposure of clearcuts, seed time and type of used planting material.Totally was measured on four areas - high fence (60x70 m), chopped (25x70 m), underplanting and the large calamity clearcuts. There were represented four different provenance and they were with or without modification of the root system, which were planted in six different dates (spring - autumn). Monitoring and evaluation were especially following features: losses, length of aboveground, increase of the terminal, root collar thickness, length and number of branches, length of needles, color of assimilation system, damage by biotic and abiotic factors. The results of my thesis confirmed that it is best to Douglas fir planted on small regenerative elements with adequate cover of surrounding vegetation. These areas register lower losses and higher increment of above-ground parts. The best planting date is in early spring. It also has confirmed great variability in the requirements for each provenance and Douglas sensitivity to drought. Effect of modification of the root system appears to be minimal.
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