DETERMINATION OF PINUS SYLVESTRIS L. TRUNK DIAMETER BASED ON STUMP DIAMETER IN DIFFERENT BOREAL CONIFEROUS FOREST CONDITIONS OF PERMSKII KRAI (RUSSIA)

• Published in: AGROFOR
• Main Authors: ROMANOV, Aleksandr, BUTORINA, Victoria
• Format: Article in Journal/Newspaper
• Language: srp
• Published: NULRS 2018
• Subjects: Fuller; Stump; taiga
• Online Access: http://doisrpska.nub.rs/index.php/AGR/article/view/4604; https://doi.org/10.7251/AGRENG1702142R

Sometimes there are situations when it is necessary to determine the size of cutlogs in the logging area in its absence. Mostly such situations arise in the detectionof illegal logging. They can also occur in the case legal harvesting, when the tenantof a forest plot does not receive the scheduled volumes of timber for which he paidthe money. In this case, the diameters of the felled trees are determined by the treestumps. Recalculation of diameters is carried out on special tables developed in theearly 20th century. Studies conducted in Krasnoyarsk, Khabarovsk, Bryansk(Russia), Gomel (Belarus), showed the need to refine the data of scaling tables forlocal conditions. Large discrepancies between actual and tabular trees appear withthe increasing diameter of the tree. Studies of the relation of the formation of thebutt log of pine (Pinus sylvestris L.) in the Perm region was carried out in 2015-2016. Forest plots were selected in different forest types of the middle taiga(Nirobskii forestry) and southern taiga (Perm urban forestry). Measurement of treeswas carried out in pure pine stands at the age of 75-130 years. The stand density ofthe plantings was of 0.6-0.8. In each forest type the replication of studies wasthreefold. Studies have shown that trunks of pines formed a fuller bole in the Permregion, than the established scaling tables. For trees 40cm in diameter,recalculation leads to underestimation of the pine tree trunk diameter by 1-2diameter class. That is understating the actual volume of felled tree by (16-20 %).There were no significant differences in the formation of the pine bole between theforest zones or by the corresponding types of forest. Also, there were no significantdifferences between forest types, which allows using a single conversion scale forthe taiga part of the Perm Territory. Due to the fact that the relative completenessof the comparative stands were close, the influence of the distance between thetrees on the development of the butt of pine trunks was not detected.