不同年龄大花序桉心材化学成分的比较研究  

Comparative Study on Chemical Constituents in Heartwood of Eucalyptus cloeziana at Different Ages

作　　者：白卫国 黎明慧 石茂鑫 韦鹏练[2] 刘衡 符韵林[2] BAI Wei-guo;LI Ming-hui;SHI Mao-xin;WEI Peng-lian;LIU Heng;FU Yun-lin(Dongmen State-owned Forest Farm of Guangxi Zhuang Autonomous Region,Chongzuo 532108,China;College of Forestry,Guangxi University,Nanning 530004,China)

机构地区：[1]广西壮族自治区国有东门林场,广西崇左532108 [2]广西大学林学院,广西南宁530004

出　　处：《江西农业学报》2022年第12期53-56,64,共5页Acta Agriculturae Jiangxi

基　　金：广西林业科技项目“大花序桉人工林木材材性增长与加工利用研究”(桂林科研[2021]20号);广西大学科研项目“大花序桉人工林集成技术研究”(BB33600122)。

摘　　要：为了提高大花序桉的综合利用率,促进其推广和应用,试验选取不同树龄(5、17、29和35年生)的大花序桉木材为研究对象,依据国家标准测定大花序桉木材的灰分、抽提物、纤维素和木质素等含量,并对不同树龄木材的化学成分进行比较分析。结果表明:灰分含量随树龄的增加而降低;冷、热水抽提物含量随树龄升高均增加,1%NaOH抽提物和苯—醇抽提物的含量随树龄增加呈现先升高后降低的变化趋势;综纤维素和半纤维素的含量随树龄增加而不断降低,而α-纤维素含量不断升高,木质素含量随树龄的增加而缓慢升高。In order to improve the comprehensive utilization rate of Eucalyptus cloeziana and promote its popularization and application,the Eucalyptus cloeziana woods at different tree ages(5,17,29 and 35-year-old)were selected as the research objects.Ash content,extractive content,cellulose content,lignin content in heartwood of Eucalyptus cloeziana were determined according to the national standards,and the chemical composition of wood of different tree ages was compared and analyzed.The results showed that the ash content decreased with the increase of tree age.The cold and hot water extracts showed an increasing trend with the increase of tree age,and the contents of 1%NaOH extract and benzene-alcohol extract increased first then decreased with the increase of tree age.The content of brown cellulose and hemicellulose decreased with the increase of tree age,while the content ofα-cellulose increased.The content of lignin increased slowly with the increase of tree age.

关 键 词：大花序桉 树龄 化学成分 心材 

分 类 号：S792.39[农业科学—林木遗传育种]