Evaluation of quantitative and qualitative characteristics of Paulownia fortunei cultivation on steep lands (Case study: Tooskestan region- Gorgan)

Increasing the world's population and increasing demand for timber have led governments to stick to wood farming. This research was conducted on the paulownia Furtoni species cultivation in Gorgan, Tuskestan area, to study of its quantitative and qualitative features. The study area is 2.9 hectares and also is outcome of the secondary growth of prior cut trees and the age of 6 years. The diameter of all trees and height of 20 percent of them were measured. Then, for the growth calculations 12 trees were chosen and cut down as well as preparing discs and recording the qualitative characteristics all of trees. After that, volume, basal area, form factor and wood density were calculated. Using by increment information, the relationship between age and height, age and diameter and trunk analysis table were determined. Results showed that average of stand diameter, average of trees height, Basel area, density of paulownia wood and stability were 11.9 cm, 9.31 m, 16.7 m ha-1, 0.22 and 64.9 percent respectively. Determination of the qualitative and quantitative characteristics of the cultivated areas are a suitable basis for a better understanding of the impact of these areas on the evolution of ecosystems and their optimal management to provide the required wood for the region and utilize their environmental services.