|
|
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.
|
|
|
Vliv kvality substrátu na růst jednoletých semenáčků lesních dřevin
Vaďura, Ondřej
The main aim of nurseries consists in obtaining quality plants at the lowest price. The aim of this thesis is to evaluate the quality and suitability of different substrates for spruce and beech seedlings that have been grown in nurseries Budisov and Planá nad Lužnicí. For the cultivation of seedlings were used substrates Gramoflor, Agro CS and Rašelina. For seedlings were measured their parameters which were statistically evaluated. Results are shown using commented tables and charts.
|
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
guest ::
