Impact of Tree Age and Size on Selected Properties of Black Locust (Robinia pseudoacacia L.) Wood

Black locust (Robinia pseudoacacia L.) is a non-native tree species that occupies remarkable area in the forests of western Poland. It mainly cultivated for bee-keeping purposes as well its high quality wood. We investigated impact age and diameter on selected structural, physical mechanical attributes wood black grows conditions mesic oligotrophic site. analysed 200 samples originating from 18 trees varied with (38, 60 71 years old) (thin, medium thick specimen according to Hartig’s method). Individual properties were determined along corresponding European or Polish standards. Structural moisture 12%. found significant tree-ring width, latewood proportion, density, oven-dry basic share woody substance, porosity, radial, tangential, longitudinal volumetric shrinkage, compression strength parallel grain, static bending, coefficient grain bending. The older trees, higher values individual observed. In turn, effect was less profound no feature anisotropy almost all shrinkage parameters. Thin exhibited lowest parameters, while ones—the highest. general, highest technical can be youngest whose characterises significantly exceeding native such oak beech.