Increment and growth in poplar plantations established in narrow spacings using the clones of Px euramericana and P. deltoides sp.

Abstract

In this study, the growth of poplar plantations in narrow spacings for wood production in accordance with the demand of the board and paper industry were investigated. For this purpose, trial plantations for P.x euramericana and P. deltoides clones have been established. I-214, I-45/51, SAMSUN (I-77/51), İZMİT (S.307-26) and 89.M.060 clones were used in trial plantations. Trials 3m x 1.5m (4.5 m2), 3m x 2m (6.0 m2), 3m x 3m (9.0 m2), 3m x 4m (12.0 m2) and 3m x 5m (15.0 m2) 5 different narrow spacings were applied. For all poplar clones, site tables and volume tables by tree diameter and height have prepared. In addition, yield tables have been prepared for 3-12 age groups according to 3 site classes and 5 different spacings. Increment and growth relationships of diameter, height and stand elements in poplar plantations in narrow spacings were revealed. According to the analysis results, it has been determined that the most suitable clone was 89.M.060 and the planting spacing 4.5 m2/tree.