Influence of stem height and radius on longitudinal shrinkage of Norway spruce
2009
Todorović, N., Faculty of Forestry, Belgrade (Serbia) | Popović, Z., Faculty of Forestry, Belgrade (Serbia)
Variation in the longitudinal shrinkage was investigate in the juvenile and mature wood of Norway spruce (Picea abies). Samples were taken at four different stem heights and per radius from the centre to the age of 26. Beside of the longitudinal shrinkage, wood density was determined, as well. The analysis of the values of the researched characteristics was carried out in three different ways: per stem height (effect of height), per stem radius (effect of cambial age) and at the same distance from the centre of the stem (effect of the same cambial age). The obtained results show that longitudinal shrinkage increases per height, and that it decreases per stem radius, whereas the density trends is quite the opposite. The variation of the longitudinal shrinkage is greater than the density variation. The relationship between density and longitudinal shrinkage in wood was also presented. The results are presented in tables and graphs with statistical parameters and they are compared to the literature values.
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