Turkish Journal of Forestry (Apr 2015)
Survival and growing of some species and provenances of paulownia in Ceyhan region (Assessment of the twelfth year)
Abstract
In the framework of the research project called “The Adaptation and Promotion of Some Paulownia Species” to the Conditions of Turkey; survival and growth of some species and provenances of Paulownia established in 1999 in Adana Ceyhan Forest Nursery were determined at the end of 2011. A total of 19 provenances of Paulownia tomentosa (Thunb.) Sieb. & Zucc. ex Steud, P. elongata S.Y.H and P. fortunei (Seem.) Hemsl species, and fortunei x tomentosa hybrid were used in the experiment. According to the results; in terms of survival rates, a significant difference among provenances was determined and the survival rate (90%) of P. fortunei Guangxi- Guilin provenance was more than that of others. However, diameter and basal area per hectare, significant differences among provenances were statistically found in height. P.fortunei Guangxi- Guilin provenance had the highest height (13.29 m) and P. fortunei Hubei-Hunan ve P. fortunei Guangxi-Guilin provenances had the largest diameter (25.95 and 25.04 cm, respectively) and basal area per hectare (34.01 and 31.12 m2/ha, respectively). As for the form of stem; there was a statistically significant difference among provenances in terms of "very smooth stem" form, while there was no significant difference among provenances in terms of "twisted and very twisted stem" form. P. fortunei Guangxi-Guilin provenance had the highest rate (85%) of “very smooth stem" form. Although a significant difference among provenances was not found in point of the "twisted" and "very twisted stem" forms, P. fortunei Guangxi-Guilin provenance had the lowest rate in the both stem forms (15.00 and 0.00 % ,respectively). In this context, P. fortunei-Guilin Guangxi provenance was seen to take place in the first order with a high percentage. In terms of crown form, in all three crown form (the perpendicular (not curved), curved and very curved crown), no difference was statistically found among provenances. P. fortunei Guangxi-Guilin had the highest rate (25.00 and 71.67 %, respectively) with regards of the perpendicular and curved crown. In this respect, P. fortunei Guangxi-Guilin provenance can generally be said to have the characteristics of the perpendicular and curved crown form. In conclusion; P. fortunei Guangxi-Guilin and P. fortunei Hubei-Hunan provenances appear to be more suited to the conditions of Ceyhan region in terms of the survival rate, height, diameter, basal area per hectare, and the quality of the stem and the crown form.
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