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2 Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2 2012

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Biomechanics of Scots pine (Pinus sylvestris L.) coming from mature stands

Jelonek T., Jakubowski M., Remlein A.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2012

No. 78

124--129

Biomechanics of Scots pine (Pinus sylvestris L.)coming from mature stands. This study presents an attempt at a determination of the effect of former farmland on biomechanical stability of trees by analyzing compressive strength, bending strength and basic density of wood. Analyses were conducted on wood of Scots pine grown on twelve locations coming from mature stands growing on former farmland and forest soils. Recorded results indicate significant differences in wood properties investigated in this study between the compared groups of trees. It was found that pines grown on forest soils were characterized by significantly higher values of parameters investigated in this study. Axial variation was also observed in all the discussed properties.

Allometric stability indexes of stands growing on former farmland soils

Jelonek T., Jakubowski M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2012

No. 78

118--123

Allometric stability indexes of stands growing on former farmland soils. The study consisted in an analysis of stability of trees growing on former farmland and forest soils on the basis of allometric indexes. Twelve mature pine stands growing on former farmland and forest soils were selected for the analyses. Pines coming from stands growing on soils typical of forest phytocenoses are characterized by slightly greater slenderness and their center of gravity is located higher than in pines growing on soils previously utilized by agriculture; however, it may be assumed that in terms of allometry the compared groups are similar.