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Morfologické změny a změny v produkci biomasy u krytokořenných semenáčků buku lesního (Fagus sylvatica L.) po výsevu naklíčených bukvic
Skuhrová, Eliška
The diploma thesis deals with the influence of different conditions and sprouts damage during sowing of germinated beechnuts on emergence, biomass production and morphological parameters of containerized planting stock of European beech. According to the condition of the sprouts, the beech seedlings were sorted into six variants (small white sprout, large brown sprout, broken sprout, two sprouts, abnormal germination) and then sown to container. To determine the impact of germinated beechnuts, they were gradually sown into the container after different length of storage in the cooler at an average temperature of +0.7 °C. According to the results, it follows that the seedlings grown from beechnuts with an undamaged small white sprout had a significantly higher emergence rate than the seedlings that were grown from beechnuts that were sown ungerminating or whose sprouts were damaged during sowing. The type and length of the beech sprout has also an effect on the morphological parameters, especially on the shape of root collar of the seedlings. No disturbance of the architecture of the root system (root collar) was recorded in the seedlings that emerged from unsprouted beechnuts or the beechnuts with broken sprouts. On the contrary, significant deformations of the root system were recorded in the case of seedlings grown from sprouted beechnuts with small white sprout, large brown sprout or two sprouts. It can therefore be stated as a rule that the smaller sprout the beechnuts will have at sowing, the smaller the risk of deformation of the root system (root collar). Furthermore, it was found that the storage of beechnuts in a cooler does not have a negative effect on the subsequent germinations of the plants. A significant effect of the storage time of beechnuts on the morphological parameters of the seedlings was not recorded. However, it follows from the research that the sowing of beechnut should be carried out in time, so that the plants create the most optimal parameters in the growing season. Thanks to these procedures, it will fulfil the conditions of standardized planting material given by the standard ČSN 48 2115 (2012).
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