Weight and green density of birch pulpwood harvested from the selected stands of Kaczory Forest Inspectorate
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2015, Vol 91, Issue
Abstract
Weight and green density of birch pulpwoodharvested from the selected stands of Kaczory Forest Inspectorate. The paper presents the results of a pilot study which was organized in the Kaczory Forest Inspectorate area. The aim of the study was to define the actual weight and green density of birch pulpwood. According to the applied methodology, the actual weight of the material is the total weight of the timber, water contained in the timber, and bark weight. In total 19,91 m3 of the material was obtained (log volume measured in the bark – without bark 17,67 m3); the total weight of the material equaled 19 181,5 kg. As per 1 m3 the actual weight of the material was approximately 963 kg. Wood material weight increases as the log volume increases, since the increase of the log volume is related to the increase of size. In this case we would look at the size of the diameter. The increase of weigh in relation to log volume without bark is even more dynamic. The increase of the material's weight is lower due to the increasing role of the bark. The timber of considerable weight and wide diameter is obtained from butt end of the trunk, in which thick layers of outer bark are located. The opposite was observed about density when the log volume increased. It appeared that the timberof smaller diameter could be of nearly double density than the thicker material of higher log volume. Probably, the influence of bark on this phenomenon is insignificant, it is rather related to selected timber properties which can be seen in the longitudinal trunk cross-section. Similar to other tree species, the weight of the birch tree timber in relation to the log volume decreases, i.e. we observe an increase in porosity. High density of the material obtained from the top part of the trunk is related to the moisture content.
Authors and Affiliations
Arkadiusz Tomczak, Tomasz Jelonek, Marcin Jakubowski, Witold Grzywiński, GRZEGORZ KRYGER
Keywords
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