Šumarski list, Vol. 135 No. 7-8, 2011.
Prethodno priopćenje
Macroscopic Characteristics and Density of Scots Pine (Pinus Sylvestris L.) from Cazin, Bosnia and Herzegowina
Hasib Kličić
; PD “Unsko-sanske šume” d.o.o., “Šumarija”, Cazin
Slavko Govorčin
; Šumarski fakultet Sveučilišta u Zagrebu
Tomislav Sinković
; Šumarski fakultet Sveučilišta u Zagrebu
Safet Gurda
; Šumarski fakultet Univerziteta u Sarajevu
Tomislav Sedlar
; Šumarski fakultet Sveučilišta u Zagrebu
Sažetak
Plantation cultivation of Scots pine (Pinus sylvestrisL.) in the world applies a longer period of time. The study of macroscopic properties and density of plantation grown Scots pine from the area of Cazin in Bosnia and Herzegovina was carried out in order to acquire knowledge about the macroscopic characteristics and density so grown pine. Plantation growth (Buckman, 1985) is primarily carried out for species of wood which, in short rotation, accomplish the greatest financial and general useful functions in a given area.
Under the provisions of ISO 3129 from year 1975, 76 test trees for studying were selected. From department 30 of unit Gata 40 test trees were taken, and from department 26 of unit Gata 36 test trees were taken. All relevant parameters were collected on selected test trees: geographical position, diameter at breast height, ground plan projection of tree top, tree orientation toward cardinal points, total tree height, height to first living branch and stump height (Kličić, 2006). Test trees were classified into three diameter classes: (1) 11 to 20 cm of diameter at breast height, (2) 21 to 30 cm of diameter at breast height and (3) 31 to 40 cm of diameter at breast height. From each test tree test sample of about 70 cm length was made, beginning at breast height. Following macroscopic properties were measured: ring width, latewood width and latewood percentage was calculated. Density was measured in oven dry condition and also basic density.
The range of ring width of studied Scots pine is large and ranges from 0.3 mm to 16.6 mm, with mean value for all three diameter classes of 3.6 mm. The range of ring width can be also seen through the variance of 4.28. Mean values of ring width for each diameter class mutually differ significantly. Distribution trend of ring width in radial direction is downward, with no major signs of achieving more constant values for all diameter classes.
Latewood percentage ranges from 1.7 % to 90 % with mean value of 38.6 % for all three diameter classes together. Distribution trend of latewood percentage in radial direction is growing. Density in oven dry condition ranges from 0.308g/cm3to 0.690 g/cm3, with mean value of 0.469 g/cm3for all three diameter classes.
Wood in trees of diameter at breast height from 11 to 20 cm has mean value of density in oven dry condition of 0.482 g/cm3, in trees of diameter at breast height from 21 to 30 cm mean value of density in oven dry condition is 0.481 g/cm3, and in trees of diameter at breast height from 31 to 40 cm is 0.453g/cm3. Mean value of density in oven dry condition for all three diameter classes is significantly different. Distribution trend of density in oven dry condition is growing for all three diameter classes, without any indication of achieving more constant values.
Basic density ranges from 0.283 g/cm3to 0.644 g/cm3, with mean value of 0.419g/cm3 for all three diameter classes together. Mean values of basic density for all three diameter classes mutually differ significantly.
Ključne riječi
density; macroscopic characteristics; plantation growth; Scots pine (Pinus sylvestris L.)
Hrčak ID:
71638
URI
Datum izdavanja:
31.8.2011.
Posjeta: 2.374 *