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首页> 外文期刊>Holzforschung >Defoliation by insects reduces the wood quality and cellulosic pulp production
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Defoliation by insects reduces the wood quality and cellulosic pulp production

机译：昆虫脱落可降低木材质量和纤维素纸浆生产

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摘要

Defoliating insects damage forest plantations, but the estimation of their losses does not take into account wood quality changes. The objective was to evaluate the wood quality and pulp production of two clones of Eucalyptus grandis x Eucalyptus urophylla (clone A) and Eucalyptus saligna (clone B) damaged or not by defoliating insects. Five healthy trees and five attacked by Gonipterus platensis Marelli (Coleoptera: Curculionidae) were selected per clone. The wood volume per hectare in the affected settlements was at least 9% lower and damaged trees showed lower wood basic density, with at least 4.6%. The lignin and extractive content in the wood increased by at least 5.6 and 45%, respectively, while the syringyl/guaiacyl (S/G) ratio remained constant for clone A and increased 10% for clone B. For pulps, an increased effective alkali and decreased pulp yield were experienced for both clones while bleaching or pulp quality was not affected. In the stands affected by defoliating insects, productivity was 9 and 19% lower considering the wood volume per hectare and 15 and 24% considering the cellulose pulp production per hectare, respectively.
机译：落叶昆虫损害森林种植园，但估算他们的损失并没有考虑木材质量的变化。目的是评估两种桉树Grandis X桉树尿道（克隆A）和桉树肠（克隆B）的木材质量和纸浆生产通过脱象抗昆虫而受损。每克隆选择五棵健康的树木和五个攻击的甘哌菌菌（Coleoptera：Curculionidae）。受影响的结算中每公顷的木材体积至少为9％，树木较低，树木碱性密度较低，至少为4.6％。木材中的木质素和萃取含量分别增加至少5.6和45％，而克隆A的克隆A仍保持恒定，并且克隆B的克隆B.对于纸浆，增加有效碱对于漂白剂或纸浆质量不受影响，两种克隆都经历了和浆料产量下降。在受昆虫脱落的影响中，考虑每公顷的木材体积和每公顷的纤维素纸浆产生，生产率为9％和19％降低了19％。

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