ABOVEGROUND BIOMASS BASIC DENSITY OF SOFTWOODS TREE SPECIES

Experimental material was obtained from 43 trees of four tree species, namely pine, fir, larch and spruce from the territory of Slovakia. Wood and bark samples were taken from the discs in three locations on a stem and from small-wood, branches coming from tree crowns. The volume of fresh samples was measured in calibrated graduated cylinders with a precision of 1 ml; a dry matter was measured with a precision of 0.01 g. The statistically significant effect has been shown in tree species, fractions of biomass and locations on the tree using a special software based on ANOVA. The average basic density of wood for all species ranges from 373 to 508 kg.m(-3). For bark it is 333-551 kg.m(-3) and for small-wood outside bark it reaches 406-535 kg.m(-3). The fir and larch have the lowest and highest values for wood density; pine and fir for bark density and pine and spruce species for small-wood density.