七种人工林针叶树材抽出物含量比较

Comparison Analysis on Extractives from 7 Plantation Softwood Species

对７种人工林针叶树材抽出物含量进行了比较研究，结果表明：１）７种木材的热水抽出物含量在９．３９％～２．２４％之间，其中日本落叶松的抽出物含量最高为９．３９％，马尾松含量最低为２．２４％；２）１％ＮａＯＨ抽出物含量在１８．００％～１１．８０％之间，其中长白落叶松的含量最高为１８．００％，杉木含量最低为１１．８０％；３）苯－醇抽出物含量在２．９０％～１．６７％之间，其中杉木的含量最高为２．９０％，云南松含量最低为１．６７％；４）抽出物含量的分布均为幼龄材高于成熟材；５）同一树种中苯－醇抽出物与木材渗透性之间存在着反方向变动的关系。

Extractives from 7 plantation softwood species( Pinus massoniana,P.elliottii,P.taeda,P.yunnanensis,Larix olgensis,L.kaempferi,Cunninghamia lanceolata )were investigated.The results indicated that:1)hot water extractives from the 7 species ranged between 2 24% and 9 39% with L.kaempferi the highest;2)content of 1% NaOH extractives from the 7 species ranged between 11 8% and 18 00% with L.olgensis the highest;3)content in bezene alcohol extractives from the 7 species ranged between 1 67% and 2 90% with Cunninghamia lanceolata the highest;4)extractives from jurenile wood were higher than those from mature wood in all these 7 species;5)there was an inverse relationship between bezene alcohol extractives and permeability in all these 7 species.