Structural-physical characteristics and chemical composition of wood of some white willow clones (Salix alba L)

The characteristics of wood of three white willow (Salix alba L.) clones, aged thirteen, were determined: clone 79/64/2 is a certified domestic variety; clone 107/65/9 is in the stage of certifying, while clone 378 is a Hungarian clone, certified as a foreign variety and used in production. Average width of growth rings is 5-7 mm, and average length of wood fibers is above one millimeter, except for the clone 79/64/2 whose fibers are shorter (0.9 mm). Nominal wood density is averagely about 340 kg/m(3), with some differences between the clones. Cellulose content is somewhat lower, and the contents of lignin and extractives is somewhat higher compared to poplar wood.