Phenological differences of quercus taxa

Abstract

The vegetative and generative development of 14 Quercus taxa was examined over two vegetation period in our study. The BBCH (Biologische Bundesanstalt, Bundessortenamt und CHemische Industrie) scale was used to describe the phenological phases, which was extended to ornamental trees. Based on our results, the bud breaking occurred in the second decade of April. Leaf development and shoot growth were finished in the following 20 days. The second shoot growing period was observed in 2018 in most of the studied plants, but not in 2019. The number or flowering trees was also higher in 2018, and the intensity of leaf discoloration was longer and more decorative. With and exception of Q. acutissima and Q. macrocarpa, all taxa had good marcescent ability.