桉树无性系的单板出材率与价值研究

草业学报 ›› 2010, Vol. 19 ›› Issue (6): 46-54.

桉树无性系的单板出材率与价值研究

任世奇,罗建中^*,彭彦,谢耀坚,卢万鸿,曹加光,姜英

国家林业局桉树研究开发中心,广东湛江 524022

收稿日期:2009-12-22 出版日期:2010-06-25 发布日期:2010-12-20
作者简介:任世奇(1984-),男,四川彭州人,在读硕士。E-mail:renshiqi200709@yahoo.com.cn
基金资助:
国家“十一五”科技支撑项目(2006BAD01A1504),国家林业局林业科学技术研究项目(2006-09)和国家林业局林业科学技术推广项目(2006-109)资助

A study on veneer recovery ratio and value of eucalypt clones

REN Shi-qi, LUO Jian-zhong, PENG Yan, XIE Yao-jian,
LU Wan-hong, CAO Jia-guang, JIANG Ying

China Eucalypty Research Centre, Zhanjiang 524022, China

Received:2009-12-22 Online:2010-06-25 Published:2010-12-20

摘要/Abstract

摘要： 为了系统深入地对单板出材率和价值的影响因素进行研究,以11个6年生桉树无性系为材料,使用无损检测仪器Pilodyn和Fakopp测定立木的外部密度和应力波传输速度,用轴向生长应变仪器CIRAD-ForestMethod测定立木生长应力,结合对原木外观形质的检测和单板质量等级的划分,运用差异性分析、相关分析及多元逐步回归分析。结果表明,无性系间立木的材性性状,原木形质中的小头最小直径、弯曲度和端裂指数存在显著差异。节疤,尤其死节(孔洞)、裂缝是降低单板等级的主要因素。无性系间单板出材率和价值存在显著差异,其中出材率(%)从大到小排序为:GL₉(48.27),EC₃₄(47.17),LH₁(44.00),DH_32-22(42.00),GL₄(37.56),SH₇(34.88),UC_184-1(34.38),LH₅(31.06),M₁(29.74),DH_201-2(25.41),SG₁(16.28),最大是最小的2.97倍;单段原木价值(RMB/log)从高到低排序为:EC₃₄(13.37),GL₉(13.12),GL₄(12.36),LH₁(12.02),DH_32-22(11.55),LH₅(10.72),SH₇(9.22),UC_184-1(7.95),M₁(7.55),DH_201-2(5.97),SG₁(4.88),最高是最低的2.74倍;单位材积价值(RMB/m³)从高到低排序为:EC₃₄(856.49),LH₁(794.55),GL₉(788.68),DH_32-22(763.02),GL₄(681.44),SH₇(629.35),UC_184-1(597.66),LH₅(559.08),M₁(538.39),DH_201-2(450.49),SG₁(294.53),最高是最低的2.91倍。5个品种的无性系作为胶合板用材,尾巨桉无性系价值最高。原木弯曲度是影响单板出材率和价值的主要因素,木材密度、小头直径、应力波传输速度及端裂指数等对其也有显著影响。无损检测仪器Pilodyn和Fakopp可对单板出材率和单位材积价值进行粗略预测。

Abstract: The veneer recovery ratio and value of eleven 6-year-old eucalypt clones were investigated using Pilodyn and Fakopp to estimate the density of outside wood and acoustic wave velocity as a non-destructive testing tool. The CIRAD-Forest method was used to measure wood growth stress and the results were combined with measurements of log external characters and veneer quality grade to find the major significant factors influencing veneer recovery ratio and value using ANOVA, correlation analysis, and multiple linear regression analysis. There were significant differences in wood density, acoustic wave velocity, growth strain, min-sed, sweep and end splitting between different clones. Knots, especially dead knots, including holes and splitting, were major factors reducing veneer quality grade. There were significant differences between veneer recovery ratio and quality grade. Veneer recovery ratio (%) of clones ranked from high to low was GL₉(48.27), EC₃₄(47.17), LH₁(44.00), DH_32-22(42.00), GL₄(37.56), SH₇(34.88), UC_184-1(34.38), LH₅(31.06), M₁(29.74), DH_201-2(25.41), and SG₁(16.28). The highest recovery ratio was 2.97 times that of the lowest. The single log value (RMB/log) of clones ranked from high to low was C₃₄(13.37), GL₉(13.12), GL₄(12.36), LH₁(12.02), DH_32-22(11.55), LH₅(10.72), SH₇(9.22), UC_184-1(7.95), M₁(7.55), DH_201-2(5.97), and SG₁(4.88), and the highest value was 2.74 times that of the lowest. The unit volume value (RMB/m³) of clones ranked from high to low was C₃₄(856.49), LH₁(794.55), GL₉(788.68), DH_32-22(763.02), GL₄(681.44), SH₇(629.35), UC_184-1(597.66), LH₅(559.08), M₁(538.39), DH_201-2(450.49), and SG₁(294.53), and the highest value was 2.91 times that of the lowest. E. urophylla×E. grandis as plywood lumber showed higher value than the other four variants during this trial. Sweep was the major factor to influence veneer recovery ratio and value, while wood density, small end diameter, acoustic wave velocity and end split index had significant impacts on veneer recovery ratio and value. Pilodyn and Fakopp were able to approximately predict and estimate veneer recovery ratio and unit volume value.

中图分类号:

任世奇,罗建中,彭彦,谢耀坚,卢万鸿,曹加光,姜英. 桉树无性系的单板出材率与价值研究[J]. 草业学报, 2010, 19(6): 46-54.

REN Shi-qi, LUO Jian-zhong, PENG Yan, XIE Yao-jian,
LU Wan-hong, CAO Jia-guang, JIANG Ying. A study on veneer recovery ratio and value of eucalypt clones[J]. Acta Prataculturae Sinica, 2010, 19(6): 46-54.

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