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Evaluation of water use efficiency of short rotation poplar coppice at Bohemian-moravian highlands
Hlaváčová, Marcela
The diploma thesis provides basic characteristics of short rotation coppice plantations, then the most significant short rotation coppice species cultivated in the Czech Republic are described. The detailed description of particular Populus L. clone J-105 grown at the plantation of the Test Station Domanínek Ltd. follows. Afterwards, key determinants of short rotation coppice yield are presented in the text. The last theoretical part of the thesis deals with water use efficiency (WUE) with emphasis on the method used at the experimental plantation in Domanínek. The methods of sap flow measurements and biomass determinations are described for this purpose. The main aim of the practical part of the thesis is to determine WUE of 16 measured trees where sap flow measuring systems were installed. These trees are divided into 3 cohorts according to diameters at breast height (DBH) at the beginning of the growing season 2013. The additional measurements were carried out: phenological imaging, soil moisture measurements, LAI measurements and sapwood area determination. The statistical analysis of WUE did not show any statistically significant differences between values of WUE for individual cohorts. Only in May, the statistically significant difference between cohort 1 (trees with the thickest stems) and cohort 3 (trees with the lowest values of DBH) appeared.
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Evaluation of changes in the functionality of the drainage systems of arable soils at Vysočina based on image analysis of time series multispectral satellite images
ŠTEFL, Jan
In Czechoslovakia 1 078 000 ha of agricultural land were drained. At present, the drain systems located in these areas are at the end of their lifetime because of unsatisfactory maintenance of these systems. This project deals with evaluation of changes in functionality of the drain systems used in arable land in Vysočina. In examined territory of the region Vysočina (except the district Pelhřimov) there were accidentally chosen testing spaces where the drain systems fill 25 -75% of surface area and where the analysis of vegetative factors and humidity was done. As a source for the vegetative factors and humidity, there were used satellite photographs Landsat. The aim was to discover whether the vitality of vegetation and humidity in the part of land with the drain systems and without the drain systems differ.
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Vegetation succession in old fields at broad landscape scales
JÍROVÁ, Alena
This thesis is focused on succession in old fields in Central Europe. Repeated sampling, analysis of surrounding vegetation and soil measurements were conducted in the Bohemian Karst Landscape protected area. Samples from the Doupovské hory Mountains and the rest of the Czech Republic were added to discover basic principles of old field succession at the larger scale of landscapes.
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Hydraulic conductivity under various recultivated growth
CEJPEK, Jiří
Velka podkrusnohorska spoil heap in the Sokolovsko region is the largest heap in the Czech republic, which was created by transfering millions of tons of soil from opencast mining of brown coal. According to a large measuring (large land surveying) of physical and chemical properties on the reclaimed and unreclaimed heap soil were found many hydrological properties. Hydraulic conductivity was measured by Guelph permeameter, moisture was measured by Dielectrical indicator of moisture and last but not least soil carbonates Ca was measured by Janek`s carbonmeter. Water mode and percantual representation of carbonates is markedly influenced by the technology of sending and by the age of heaps of both types, differencies between bottom parts and top parts on unreclaimed soil are conclusive due to crevasses on the top parts. The other factor is the presence of reclaimed vegetation, which have an important role in the pedogenic process.
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