Abstract
This study analyzed the variability of truckloads of large-sized pine logs transported to a furniture manufacturing mill, depending on the origin of the timber, delivery period, length of the transported logs, volume of the load and its mass. It was assumed that the volume and mass of the transported timber load depends on the season of the year and the origin of the timber, which has a significant impact on the mass of one cubic meter of the load. The analysis of the wood origin parameters (location of its growth) took into account the type of forest habitat, soil type and stand abundance. The characteristics of the tree parameters from which the roundwood was obtained took into account age, diameter at breast height (DBH) and height of the stand. The origin of the timber was determined for 1063 timber loads from 40 forest districts transported over a 12 month period. We obtained an average timber load volume of 29.34 m3 which includes single shipments differing significantly in their volume of between 24.21 and 36.51 m3. The origin of the timber, habitat conditions and stand parameters of the harvesting site influence load mass and the mass of 1 m3 of load. The delivery date has an impact on the studied elements of the sawlogs load, with two similar periods—spring and summer. The volume of the transported timber is already at a stabilized level in accordance with legal regulations, which is no longer dependent on other factors and only on the accepted conversion factors for roundwood density and the mass of the empty vehicle set. This has not influenced a reduction in the mass of the transported timber.
Highlights
Based on the Statistical Yearbook of Forestry 2019, the total forest area in Poland is 9242 thousand ha.The area of all coniferous trees is 6309 thousand ha (68.4% of total forest area)
The delivered sawlogs pine timber came from 40 forest districts and the following forest habitat types:
In the case of 873 transports, the timber was cut based on final harvesting, the remaining cases were pre-final cuttings
Summary
Based on the Statistical Yearbook of Forestry 2019, the total forest area in Poland is 9242 thousand ha. The area of all coniferous trees is 6309 thousand ha (68.4% of total forest area). Scots pine (Pinus Sylvestris) with an area of 5366 thousand ha (58.2% of total forest area) [1]. The natural potential and proper management of forests allows the increase of the harvest of raw material, to secure increasing demand from wood industry. In 2018, State Forestssold 47.7 million m3 of total timber volume, of which sawmill coniferous timber (softwood saw timber) constituted 14.5 million m3 [1]. In terms of raw material, large-size pine wood is one of the basic assortments sold by SF and used by the wood industry in Poland
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