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Vliv vyvětvování na tloušťkový a výškový přírůst třešně ptačí (Prunus avium L.) v podmínkách ŠLP "Masarykův les" Křtiny
Žalek, Mikuláš
Wild cherry produces very valuable wood that can increase economic benefits in forest management. In order to achieve quality cherries, it is necessary to carry out the pruning, which gradually achieves straight, long and knotless trunks. The aim of the work was to evaluate the reaction of cherries to different ways of pruning. The research took place in four young stands located at the TFE Křtiny. The results confirm that the pruning has a negative effect on the diameter increment. The more powerful the crown reduction, the more increment decreases. The effect of pruning on the height increment did not prove certainly. A practical recommendation is to realise a milder or selective pruning method that does not reduce significantly the diameter increment. Wild cherries should be pruned in time, repeatedly after two to three years, when the branches are not too thick, and a rapid healing of the cutting wounds can be expected. In addition, it is necessary to grow cherry trees with nurse species, which protect their trunks from the sunlight causing secondary shoots.
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Růst a postavení třešně ptačí v porostech na LZ Židlochovice
Sklenářová, Monika
Rapidly growing cherry trees are valuable. As the forests may espouse as ecological and even economic function. In order to could have these in the forest stands to be achieved it is necessary artificial pruning trees. My research conducted in three undergraduate work at LZ Židlochovice. In the A- Growth was evaluated the thickness and height increment cherries for a period of three years in 2016. The pruning was done only once. The research B was started in 2017 and in the same year was prunned a part of trees. Effect of pruning of thickness and height increment was studied for 2 years. The research C was evaluated the influence of agroforestry for one each tree from 2017 to 2019 (for two years). The results showed that in A and B researches the pruning should not have had negative effect on height increment, however, in the growth B the pruning had a positive influence on height increment. In the both (A and B), in the contrary, the pruning conducted to reduce thickness of increment. In the C research are shown positive effects on growing out of cherries. The results show that the pruning of the cherry an important educational intervention, but it must be done in a timely and regular manner.
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Postavení a výchova třešně ptačí v porostu ve stavu převodu na les střední (ŠLP Křtiny - polesí Vranov)
Žalek, Mikuláš
Wild cherry is a promising tree for our forest management for ecological and economical reasons. In order to achieve a higher economic valuation of cherry wood, a special silvicultural measure must be carried out - artificial pruning. The pruning means removing the lower large branches and thus obtaining long, more quality boles without knots. The pruning of cherries took place in two differently old stands at the Training Forest Enterprise Křtiny. In stand A young wild cherry trees were pruned in three different ways: leaving only this year's increment (S), leaving the last whorl (P) and control, i.e. no pruning (K). In stand B several target trees, that were pruned, were selected and several control cherries without pruning for comparison of increments. The results show that pruning does not influence height growth, but the diameter growth has decreased with increasing intensity of pruning. The same decrease is observed for basal area increment. The data suggest that pruning should be done moderately at a younger stage of cherry development, when the removed branches are not too large.
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