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Hodnocení ontogenetického vývinu vybraného druhu dřeviny
Pavlíček, Michael
This paper deals with the assessment of ontogeny of the tree Tilia cordata Mill. ac-cording to the methodology of Raimbault (2006) in the city of Přerov. The catalogue cre-ated in the bachelor thesis shows all ten stages of tree ontogeny as described by Raimbault (2006) and displays typical individuals, all supplemented with additional data for each stage. In the next stage, two selected stages of the tree's development were compared, namely stages five and six. Basic dendrometric parameters such as the height of the tree, its girth, crown width, etc., were compared, and additionally the leaves were also com-pared in terms of their width and length, as well as trees’ fruits.
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Vkládání výchovných dřevin do dubových porostů na lužních stanovištích Kojetínska
Berčík, Vojtěch
The content of this bachelor thesis was the issue of maintaining a more dynamic growth of the small-leaved linden (Tilia cordata Mill.) in the understories of oak stands (Quercus robur L.) at the floodplains around the town Kojetin. The work consists of three phases. In the first stage the height structure of selected stands and the social status of lime trees were evaluated. In the second stage, experimental educational intervention (trimming the linden at a given height) was accomplished. And in the third phase, this experiment was evaluated. The research was in progress between 2016 and 2018, during this time an experiment was established and two control measurements were done. The results confirmed a more dynamic growth of the linden compared to the oak. The results also show that linden restores its growth well after cutting the above-ground part. The results of the influence of the cutting height on the subsequent linden growth rates have failed to prove due to enormous pressure of the roe deer in this area.
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Výskyt jmelí bílého (Viscum album) ve Frýdku-Místku
Kovalčík, Lukáš
The literary research which includes description of European mistletoe (Viscum album) was written according to available literature. It engages in botanical characteristics, morphological signs and physiology of mistletoe. There are also described the ways of dissemination of mistletoe, sorting of woody plants by their resistance to this hemiparasite. The next part of the thesis summarizes the damage caused by mistletoe, possible protection, and types of treatment of affected trees. Three localities in the city of Frýdek-Místek where woody plants, which are heavily affected by European mistletoe, occur were chosen for practical evaluation. There are these woody plants species present: Canadian popler (Populus x canadensis), small-leaved lime (Tilia cordata) and rowen (Sorbus aucuparia). During the research, the oldest mistletoe specimen was detected to be 20 years old. Differences between achievable ages of a hemiparasite and a host plant can be the cause, why affection by mistletoe leads to death of a host plant. The lowest age when mistletoe starts to affect woody plants is species specific and is between 11 and 30 years. Knowledge of this lowest age is important for determination of the time to start monitoring these trees.
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