ZLV Online

Abstrakt

The paper presents results of seeding experiment of sliver fir (Abies alba Mill.) and Norway spruce (Picea abies L. Karst) in the selection forest. There is still a lack of knowledge about the germination and survival of seedlings in the differentiated forests. The experiment was performed in a managed forest with the selection structure. We established 24 sowing plots in the altitude 960−1050 m a.s.l., north exposure. One hundred of germinative seeds were sowed per one 1 m × 1 m plot. The level of direct and diffuse radiation and share of canopy gaps were measured on each of sowing plots. We analyzed the effect of applied tree species, different soil treatment, date of sowing and light environment on the abundance of germinated and survived seedlings. In addition, we studied the impact of climate conditions (average day temperatures and precipitations) on the seeds germination as well. The analysis revealed the direct effect of climate factors on the survival of spruce seedlings. We recorded the precipitation deficiency of 40 mm during the monitored 42 days that closely corresponded with the highest-recorded mortality of spruce seedlings (73 %). In time of the first inventory, the total amount of spruce seedlings was almost twenty-fold higher than the number of germinated firs. However, in time of the last inventory, the abundance of fir seedlings was 3.5 times higher than that of spruce seedlings. The different level of neither direct and diffuse radiation nor openness affected directly the average number of survived seedlings.