The effect of tree slenderness on wood properties in Scots pine. Part II: modulus of rupture and modulus of elasticity
Journal Title: Annals of WULS, Forestry and Wood Technology; Zeszyty naukowe SGGW - Year 2016, Vol 96, Issue 1
Abstract
The effect of tree slenderness on wood properties in Scots pine. Part II: modulus of rupture and modulus of elasticity. The aim of this work was analyse the variability in static modulus of rupture (MOR) and modulus of elasticity on static bending (MOE), in the trunks of pines. We put forward the hypothesis that the analysed properties will take higher values in the case of slender trunks, and additionally that the variation in the properties in slender trunks will be smaller. A study was made of 14 model trees from mature pine stands located in north-western Poland. All of the trees had similar DBH in bark of approximately 32 cm. The trees were divided into two groups: taller, with a mean height of 27.6 m, and shorter, with a mean height of 23.7 m. This selection led to groups of trees with trunks with lower (S74) and higher (S87) values of the slenderness ratio. Our results show statistically significant differences in MOR and MOE between the groups of trees. Higher values were recorded for the tall, more slender trees. The differences in the properties of wood from tall and short trees may suggest the conclusion that quality of material is of importance for a tree’s dynamics. It is hard to state how great is this importance, because the biomechanical system is a complex network of relationships and dependences. Keywords:
Authors and Affiliations
ARKADIUSZ TOMCZAK, TOMASZ JELONEK, MARCIN JAKUBOWSKI, WITOLD PAZDROWSKI
Keywords
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