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Dlouhodobé skladování krytokořenného sadebního materiálu lesních dřevin
Pantová, Petra
This bachelor thesis deals with the determination of suitable conditions for overwinter storage of containerized planting stock of forest tree species, namely European beech and Norway spruce. The monitored trees were stored over the winter in freezer storage with set and recorded temperatures of -1.7 °C, -2.7 °C and -6.6 °C. Another was used the refrigerated storage in cooler storage where was the temperature set of +2.4 °C and maintained at 100% relative atmospheric humidity and the nonrefrigerated storage systems – open storage. The overwinter storage´s trees were planted in the spring and the plant´s vitality was appraised. At the end of the first vegetation period, the basic morphological parameters and aspects were evaluated. According to the processed and evaluated results, it is necessary to store the plants in a state of deep dormancy from the point of view of the appropriate storage period. As an inappropriate temperature for storage of the two tree species of interest, the temperature was determined at -6.6 °C. The optimum storage temperature in freezer storages is determined at -2.7 °C. The results show that Norway spruce is less suitable for a cooler storage with temperature of +2.4 °C due to fungal diseases, even after application of fungicide. The optimum time of thawing – acclimation time for temperature -2.7 °C is 1 week. Longer acclimatization 35 days is only suitable for plants storage at -6.6 °C because of losses during the first growing period. According to the results, optimal amount of nitrogen fertilization should be observed, since over-fertilization and non-fertilization lead to higher losses and poor growth of plants after planting, especially the European beech.
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