Wood and bark composition of Picea orientalis (L) Link

Abstract

Cell-wall components of Picea orientalis wood were determined according to the methods of wood analysis. The wood contained higher amounts of cell-wall components than the bark. Lignin content was found to be higher in the outer bark than that in the inner bark. but holocellulose and cellulose contents were lower in the outer bark than those of the inner bark. Total yield of successive extractions with benzene, diethyl ether; hot water, ethanol and 1% NaOH was 68.9% for the outer bark and 56.1% for the inner bark. Stiasny number taken as 3. measure for condensed tannins was seen to vary from 26.6 to 55.8. The wood contained 0.4-0.6% of lipophilic extractives, whereas the bark contained 4.5-6.4% of them. Lipophilic extractives were composed of fatty acids, resin acids, alcohols and sterols. Polar extractives of the wood were composed of monosaccharides and lignans. The bark contained numerous constituents of phenolic nature in addition to monosaccharides and lignans.