Leszek Bednorz, Agnieszka Urbaniak
Phenology of the wild service tree (Sorbus torminalis (L.) Crantz) in Poznań and Wielkopolski National Park
Dendrobiology 2005, vol. 53: 3-10
Abstract: In this paper the results of the 3-year observations (2001–2003) of seasonal rhythm of S. torminalis trees growing in Poznań in Dendrological Garden of Agricultural University and in forests of Wielkopolski National Park are presented. The observations included the course of leaf development, leaf coloration and leaf fall as well as flowering, fruit ripening and fall. Sixteen phenophases were taken into account. The differences in timing and duration of S. torminalis phenophases from year to year, between two sites and among trees within the same site are pointed out and discussed.
Additional key words: seasonal rhythm, climate factors, trees, Rosaceae