Growth and Development of the Introduced Picea L. (Karst.) Species in the Taiga Zone (Karelia)

The study was conducted in the Botanical Garden of Petrozavodsk State University (South Karelia, middle taiga subzone) from April to October during 1988–2016. following representatives genus Picea were investigated: four introduced species (Picea glauca (Moench) Voss [syn. P. canadensis Britt.], pungens Engelm. f. viridis Regel., obovata Ledeb., and mariana Britt.) one native (P. abies (L.) Karst.). growth shoots starts 1–4 weeks earlier ends 1–3 later compared species. earliest culmination shoot is observed latest abies. longest are formed by dynamics differs considerably between dates beginning studied a certain extent affected temperature air. needles begin grow 1–2 than needle pungens. show largest length increment, while other species, it 2–4 times smaller. There noticeable difference on which largely determined air solar radiation produce substantial effect time occurrence most phenophases found be promising spruce for residential landscaping creation artificial plant communities Karelia