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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Reakce sazenic vybraných druhů dřevin na zaplavení
 Ryšavý, Jan
The thesis investigates the response to flooding of five species types of trees occurring in floodplain forests of South Moravia. This work aimed to evauate different lengths of the seedling flooding and examined seedling vitality and mortality. The investigated tree species were summer oak (Quercus robur L.), hornbeam elm (Ulmus minor Mill.), heart linden (Tilia cordata Mill.), hornbeam (Carpinus betulus L.) and field maple (Acer campestre L.). The flooding experiment was conducted from April to July 2022 and at different time intervals (7-14 days) the seedlings were flooded up to the root collar. Control seedlings were not flooded but only watered. 140 seedlings of each species were flooded and were gradually removed from the flood. The results show that relatively low mortality was observed for the flooded trees in all intervals. It was lowest for Quercus robur and Tilia cordata, which were characterized by high vitality in addition to low mortality. Ulmus minor was characterized by moderately vital seedlings. Acer campestre and Carpinus betulus had the highest mortality and their vitality decreased significantly towards the end of the experiment. The hypothesis of Quercus robur's resistance to flooding has been confirmed, which means the seedlings of this tree can probably cope well with flooding even in the conditions of floodplain forests. Tilia cordata also coped very well with flooding. It has probably invested in trunk thickness in response to water stress, adapted to flooding and thus gained a competitive advantage over other tree species. The thesis confirmed the assumption that Quercus robur is a resilient tree species to flooding and Tilia cordata showed higher resilience than expected.
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Hodnocení stavu a vývoje přirozené obnovy na TVP “Smrk“ se zaměřením na habr obecný (Carpinus betulus L.) na polesí Vranov; ŠLP Masarykův les Křtiny
 Betáková, Nikola
Hornbeam is a neglected and not very desirable tree species in our forests. Despite this, its representation in mixed and deciduous forests is increasing. This is mainly due to its excellent natural rejuvenation ability, its ability to adapt and grow in almost any habitat. This thesis deals with the assessment of the status and development of natural regeneration with a focus on hornbeam. The thesis also includes research conducted on permanent research plots ("Spruce", stand 69C9) established in the Vranov forest, Masaryk Forest Křtiny. Data measured using basic dendrometric parameters were compared. The beginning of the measurements is dated from 1958 to the present. In the results it was confirmed that hornbeam rejuvenates very well on these sites. Notwithstanding the presence of other tree species in the parent stand, the natural regeneration of hornbeam was considerably higher. It is a shade-tolerant tree species that does not show large increments in height or thickness. It holds its own in the lower echelons and thus helps to nurture target economic tree species.
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