Wood Quality along the Trunk Height of Birch and Aspen Growing in the Restoring Forests of Central Russia

The structure of forests has changed with an increase in soft-wooded broadleaved species over the past decade. demand for hard-wooded can be met by replacing them compressed wood species. Existing technologies do not fully take into account density variations that exist along height a tree trunk. In this study, we examined variability birch and aspen microstructures trunk, including vessels per square millimeter diameter (tangential radial) vessel lumina. research was carried out on growing Central Russia. both increased from base to top trunk their diameters decreased Birch demonstrated greater changes these values than aspen. There strong relationship between lumina height. A decrease stemwood caused millimeter. These results affected determined degree compression as well initial size blanks required obtain material uniform quality indicators, regardless source location raw materials