DIGITALNA ARHIVA ŠUMARSKOG LISTA

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ŠUMARSKI LIST 7-8/2011 str. 43 <-- 43 --> PDF |

H. Kličić, S. Govorčin, T. Sinković, S. Gurda, T. Sedlar: MAKROSKOPSKE KARAKTERISTIKE I GUSTOĆA... Šumarski list br. 7–8, CXXXV (2011), 371-377 (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/cm3for all three diameter classes together. Mean values of basic density for all three diameter classes mutually differ significantly. Key words:Scots pine (Pinus sylvestris L.), macroscopic characteristics, density, plantation growth |