摘要
本文报道了意杨三个无性系纸浆材材性变异规律。纤维长度、长宽比径向表现为递增，８～１０年后纤维长度趋于稳定，８年后长宽比趋于稳定；纤维长度在纵向上呈递减的模式。基本密度径向上呈递增的模式，８年后趋于稳定，纵向上表现出递增的趋势。纤维素含量径向呈递增模式，１０～１２年后递增速度减慢；木素、多缩戊糖含量在径向呈递减趋势，１０年后趋于稳定，而多缩戊糖含量１０～１２年后趋于稳定。意杨木材幼龄期约为８年。从意杨纸浆材材性工艺指标，确定意杨纸浆林８～９年时主伐利用较佳。
The variations in fiber length, specific gravity and comp0sition content of three Italian poplars clones for pulpwood Tvere reported in this pa-per. Ir radial direction,fiber length,specific gravity and cellulose content of wood increased from pith outward, and level off after 8 to 10 years old;lignin and pentosan content decreased from pith to bark, and level off after 10 years old. The radial variation of fiber length-width ratio was similar to the patten of fiber length.Along the stem height,fiber Iength decreased gradually and specific gravity increased from base upward.Based on radial variation of fiber length and specific gravity at 1.3 m height within trees,the duration of juvenile peroid was determined about 8 years old. Its lower specific gravity is improved by tree breeding. Based on variations in the whole tree's fiber length,specific gravity,chemi-cal composit and growth property,harvesting of Italian populars for pulp-wood at 8 to 9 years old was good.
出处
《木材工业》
北大核心
1994年第1期38-44,共7页
China Wood Industry
基金
湖北省自然科学基金
关键词
意杨
纤维长度
化学成分
纸浆材
材性变异
Italian populars
Fiber length
Specific gravity
Chemical com-ponent
Variation
Duration of juvenile peroid
Harvesting age
