ISHS Acta Horticulturae 556: V International Congress on Hazelnut
FLOWERING OF HAZELNUT CULTIVARS FROM DIFFERENT REGIONS UNDER THE CLIMATIC CONDITIONS OF SOUTHERN POLAND |
| Authors: | Z. Piskornik, G.M. Wyzgolik, M. Piskornik |
| Keywords: | Corylus avellana, filbert, phenology, dichogamy, chilling, endodormancy |
| Abstract:
Under the climatic conditions of southern Poland, the time of flowering and the phenomenon of dichogamy were observed in 46 genotypes of hazelnut (Corylus sp.) originating in various countries. Following two mild winters (42 and 62 days with a mean temperature below 0 °C), most genotypes showed protogyny. After a severe and short winter (77 days with a mean temperature below 0 °C), a considerable number of genotypes exhibited homogamy, while after a severe and long winter (99 days with a mean temperature below 0 °C), some genotypes were protandrous and the number of protogynous ones decreased substantially. The duration of the flowering period depended on temperature, ranging from about 22 days when the mean temperature of the period was 5-10 °C, to 43 days when the temperature did not exceed 3 °C. At higher temperatures (5-10 °C), early and late genotypes began flowering not more than 8 days apart, whereas at lower temperatures differences in flowering times between genotypes were greater. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
