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Vysýchání sadebního materiálu během manipulace a metody jeho hodnocení
Volf, Luděk
The target of the thesis was evaluation of adoption and growing planting material of Norway spruce ( Picea abies (L.) Karst) and European beech (Fagus sylvatica L.) after some time of having dryness caused by wrong manipulation. There were always tested different kinds of planting material - without soil and with soil on roots , fresh planting material and 1 week inserted into soil. Planting material without soil and with soil on roots was left on the soil surface next to place of planting without any protection against drying out and in specificied time intervals planted. Expose time 30mins, 60mins,120mins, 180mins, 240mins, 300min (330mins). In each tested variation was planted 20pcs of young plant. At the same time testing of new methods was realised. They secure water loss during drying out. Methods tried in practice were measuring weight loss during constant temperature conditions, measuring weight loss of plants with soil on roots and measuring humidity of soil on roots substratum. At the end of vegetational period was appointed mortality , termal growth, thickness of root shank, lenght of leaf and vitality. It was confirmed that within increasing time lenght appears reduction of growth and viability, primarily among young plants of beech. Young plants of spruce are more adaptable during mistreating and firtst of all it depends on spring time weather conditions. Tested methods of drying out should continue in further measuring.
Vysychání krytokořenného sadebního materiálu při manipulaci a jeho vliv na ujímavost a odrůstání rostlin po výsadbě
Volf, Luděk
The aim of this Master thesis was to assess the survival and growing out of container planting stock for the Norway spruce (Picea abies (L.) Karst) and the European beech (Fagus sylvatica L.) after the set period of stressing by dessication due to incorrect manipulation. The plants exposed to desiccation for 2, 3, 4 and 5 days were planted in a research area. During the first day of testing, the variant for checking of unstressed planting stock was planted. The research also included the testing of new methods for assessing root ball water loss during plant desiccation. The method for measuring the decrease in weight of a root ball during manipulation was used and two devices for measure moisture levels in root balls were tested (HH2 and WHT 860). The first assessment was carried out five weeks after planting out, during which vitality and sprouting progress were assessed. The second assessment took place at the end of the vegetation period, and vitality, duration of apical increment, thickness of the rootcollar and the length of needles and leaves were assessed. It was confirmed that with an increased duration of root ball desiccation comes the loss of moisture which after a certain period of time negatively impacted the survival and growing out of the tested plants. The limit for the root ball was a 3-day-long exposure of the planting stock to desiccation. The spruce planting stock is significantly more resistant to the negative effects of radiation and desiccation than the beech planting stock. The minimal threshold for moisture levels was set, determining when the planting stock can grow out without any major problems. The tested methods appear to be promising and can be used to assess the planting stock quality before the planting.

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2 Volf, Lubomír
4 Volf, Lukáš
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