修枝对尾巨桉木材单板质量的影响

对6年生尾巨桉修枝材旋切单板进行研究,从径级和高度上比较了不同等级单板的比率.研究结果表明:修枝材的一级板和二级板比率显著提高,一级板的比率随径级增大而增大;受高度影响修枝材第一段圆木各径级单板质量优于第二段圆木各径级单板质量.

Effects of Pruning on Veneer Quality of Eucalyptus urophylla ×E. grandis

Pruning of Eucalyptus urophylla×E. grandistrees grown for veneer production over a 6-year rotation was studied. The percentage recoveries of different veneer grades were compared for logs obtained from different stem heights and for logs of varying diameters. The results showed that the recoveries of Grade 1 and Grade 2 veneersfrom pruned logs were higher than from unpruned logs, and the recovery of Grade 1 veneer increased with increasing log diameter. Log height also had an impact on grades of veneer recovered from logs with the first (lowest) logs from trees yielding higher recoveries of better grades than the second logs, even where the second logs had also been pruned.