اثر قطر و تعداد جوانه قلم روي جوانه زني چنار

Diameter and number of cutting bud impact on sprouting of Platanus orientalis

Plane tree (Platanus orientalis) as a fast growing tree species is a suitable tree for planting in urban areas and a forestation. But it has problems in terms of propagation. So, an experiment conducted to investigate methods of propagation by different cuttings. For this experiment, cutting branches of two years age with different diameters size of 9>mm (small), 10-15(medium) and 16-25 (big) ,with two and three buds, were used from Troq nursery. Cuttings planted vertically into loamy soil, so that one bud was out of soil. Data were collected for eight periods from March 31 to August 6 of 2004. The first sproutings were observed 10 days after planting. The trend of sproutings were fast by about 10 May and then became slow and ceased. Measurement of sprouting was cumulative. The results of cutting sprouting percentage by the end of experiment showed significant differences between big and small diameters. Cutting of big, medium and small size produced 97%, 93% and 89% of sprouting, respectively. There were no significant differences between two and three cutting buds. Cuttings of three buds had 94% and cuttings of two buds had 92% sprouting. In general, all cuttings produced more than 80% sprouting, so in spite of importance of sprouting in plant propagation and better results in which obtained from big cuttings, it seems that sprouting is not a main problem for plane tree.