The Effect of the intensity of Thinning on the diameter and longitudinal growth of regenerated young Pinus brutia Ten. trees after fire Balloran region

Abstract

The research was carried out in the Pinus brutia Ten. forests in Balloran region - Lattakia during the period 2020-2022 to study the effect of breeding and development works (thinning) on some growth indicators (as diameter and height) of the regenerated Pinus brutia Ten. after the mass fire that occurred in 2012, two sites were taken; namely: Al-Habasha site and Al-Eman site. The number of trees of the Pinus brutia Ten. was counted, and its diameters and heights were measured within plots of dimensions 10 * 10 m². Then, the thinning process was applied to the growths of the Pinus brutia Ten. in intensity (45,30,15&0%) with three replications for each intensity, and after a year of thinning, the diameters and heights of the Pinus brutia Ten. trees were re-measured in the two study sites.

The largest value for the increase in average diameter of the studying type’s members was with thinning intensity 45% in both sites, while the values ​​of the increase in Average height was varied; In Al-Eman site, its largest value was (9.85 cm) with thinning intensity 30%, while in Al-Habasha site, its largest value was (6.26 cm) with thinning intensity 45%. Accordingly, it is possible to apply the early thinning of the Pinus brutia Ten. tress in burnt sites with varying intensities ranging between 15-45% depending on the plant density and on age approximately 8 years.