引种四川桤木木材化学组分的分析与评价

首次报道了四川桤木５、８和１１２年生３种树龄木材的化学组分测定结果。与其它制浆阔叶木的比较表明,虽然四川桤木的木素含量略高,但木材密度适中,灰分含量中等,各种抽出物含量较低,纤维素含量较高,是优良的纸浆纤维用材。研究发现,木材密度、灰分和热水、苯醇同物含量在个体间差异很大,而其它组分在个体间较为均一。树龄与木材密度和灰分含量的关系不大,而对其它组分影响显著,年幼树木的木材抽出物和戊聚糖含量高,而木

Wood Chemical Composition of Alnus Cremastogyne Burk in the Plantation Area of Fujian Province

Wood chemicalcompositions of 5-,8-and 11-yr -old Alnus cremastogyne plantations in the plantation area of F ujian Provinceare reported. Comparing wi th other hardwood species Alnus cremastogyne is a good speciesa s the raw material of BKP,CTMP or BCTMP etc. There are great differences betwee n trees inwood density,ashcontent,hot waterextractive,1% NaOHextractive and alcohol-benzene extractive. The effec t s of age of the tree on itschemical composition is significant,on the other h and tree age has little effect on wood density andash content. The younger tree has higher extractives and pentosan content, but lower lignin and celluloseco mpared with the aged tree. Correlation analysis shows that growth rate has no ef fecton wood density and chemical composition of Alnus cremastogyne plantations in theplantation area.