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对5个尾巨桉无性系的原木旋切单板的研究表明,5个无性系的木材密度、应力波传输速度及原木端裂指数、出材率、原木价值及单位材积原木的单板价值方面均存在差异。单板出材率从高至低的顺序是DH32-28>DH61-1>DH32-26>DH33-27>DH15-3,原木生产单板价值从高至低的顺序是DH61-1>DH32-26>DH32-28>DH33-27>DH15-3,单位材积原木生产的单板价值从高至低的顺序是DH32-28>DH32-26>DH61-1>DH33-27>DH15-3。影响单板出材率的主要因子是原木的弯曲度;影响原木单板产品价值的主要因子是大头直径、小头直径、最小小头直径和木材密度;影响单位材积原木的单板产品价值的主要因子相关性从大到小依次是木材密度、弯曲度、小头最小直径和端裂指数。从小头最小直径能较好地预测原木的价值,相关系数达0.8949;小头最小直径和弯曲度可以预测单位材积原木的单板产品的价值。建立的5个回归方程为原木分级和定价销售提供了依据。无损检测立木木材密度(Pilodyn测定值)和应力波传输速度能够较好地预测原木端裂指数,但是并不能由此预测单板出材率或原木价值。本研究为通过育种和营林措施培育高价值胶合板单板用尾巨桉木材提供基础数据。
The results of five wood veneer clones of Rotary Veneer showed that the density of wood, the stress wave propagation velocity and the index of wood split, the yield rate, the value of wood and the veneer value of wood per unit volume There are differences in aspects. The order of descending from veneer is DH32-28> DH61-1> DH32-26> DH33-27> DH15-3. The descending order of the veneer lumber is DH61-1> DH32- 26> DH32-28> DH33-27> DH15-3, the unit value of veneer produced from logs per unit volume is DH32-28> DH32-26> DH61-1> DH33-27> DH15-3. The main factor affecting the veneer yield is the curvature of the logs. The main factors influencing the value of the veneer veneer products are the diameter of the big head, the diameter of the small head, the minimum diameter of the small head and the density of the wood; the value of veneer products affecting the unit volume of logs From the largest to the smallest, the wood density, tortuosity, the smallest diameter of the head and the index of the end fissure were the order of the main factors. The minimum diameter of the small head can better predict the value of logs, the correlation coefficient of 0.8949; small head minimum diameter and curvature can predict the value of single board wood products. The establishment of the five regression equation for the classification and pricing of logs provide the basis for sales. Non-destructive testing Wood density (Pilodyn measurements) and stress wave transmission speed are good predictors of wood end cracking index, but can not predict the veneer yield or wood value. This study provides basic data for breeding high-value plywood veneers with Eucalyptus urophylla wood through breeding and silvicultural measures.