摘要
以２１年树龄的池杉为试材，研究了池杉纸浆材管胞形态、木材密度和化学组分含量的变异规律。结果表明：管胞长度、宽度、长宽比、壁腔比、基本密度及纤维素含量径向为递增、稳定的模式，而木素、戊聚糖、苯醇抽出物含量及腔径比等径向变异为递减、稳定的模式；轴向管胞长度、长宽比变化模式为短─长─短、小─大─小；木材密度１．３ｍ高度以上则呈递减的模式。池杉木材幼龄期为１２～１４年，其纸浆林工艺成熟龄约为１４～１８年。
The variation in tracheid feature,specificgravity and compostion of pond baldcypress (Taxodium ascendens Brongn.) for pulpwood were reported in this paper.In radial direction, tracheid length, tracheid width, tracheid length-width ratio,tracheid clual wall thickness-diameter ratio, specific gravity (excluding 0.3 m tree height level) and cellulose content of wood increase from pith outward; and pentosan,lignin, extractives content and tracheid diameter-width ratio decrease from pith to bark.All above level off separately after 7～14 years old. Along the stem height,tracheid length and tracheid length-width ratio first increase then decrease; and specifi gravity decrease from. base (above 1.3 m tree height level ) upward. Allowing for basic demand of pulpwood properties and variation in wood characteristics of trees of different ages and the tree growth properties. technical maturity of pond baldcypress for pulpwood is 14～18 years old.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1994年第4期402-408,共7页
Journal of Huazhong Agricultural University
基金
湖北省自然科学基金
关键词
池杉
纸浆材
材性变异
工艺成熟龄
pond baldcypress
pulpwood
variation in wood properties
technical maturity
