| Název článku: | Vplyv gradientu nadmorskej výšky na produkciu jelše sivej (Alnus incana (L.) Moench.) v podmienkach Bukovských vrchov |
|---|---|
| Číslo: | 3 |
| Rok: | 2016 |
| Autor: | Michal Bugala, Zuzana Parobeková |
The paper analyzes production and growth sensitivity of the grey alder (Alnus incana (L.) Moench.) population in the Cirocha River basin in the orographic unit Bukovské vrchy (Slovak Republic). Along the altitudinal gradient of the river basin eight permanent research plots were established at the altitude of 270–770 m a.s.l. Three canopy individuals (height category 1 and 2) on each plot were cored, in total 24 increment cores were obtained. According to the results of increment analysis, significant differences in the basal area increments (BAI) could be recognized among investigated altitudinal zones. The highest average basal area increment (BAIa) of all cored individuals in the plot (1026 ± 452 mm2.year-1) was detected in the zone of 400 m a.s.l. From this altitudinal zone, the continuous decrease of average BAIa values was observed related to increasing or decreasing altitude. The average annual volume increment (iv) of the model grey alder stand created by 530 canopy individuals per hectare was 4.18 m3.ha-1 per year. The analysis of growth sensitivity showed the low growth sensitivity level of the investigated alder populations to external signals.
