摘要
[目的]研究香椿生长轮宽度、木材气干密度和纤维长度的径向变异和相关性。[方法]应用生长轮材质分析理论分别对香椿的生长轮宽度、木材气干密度和纤维长度进行测定。运用SPSS 13.0拟合生长轮宽度、木材气干密度、纤维长度与树龄相关的模型。[结果]结果表明，32年生香椿生长轮平均宽度为1.382cm，最大值在第9年生时，为2.217cm，21～31年生后生长轮宽度趋于稳定，在0.683～1.000cm范围内波动。木材气干密度与纤维长度随树龄递增。木材气干密度的平均值为0.475g／cm^3，17年时达0.543g／cm^3，之后在0.507～0.564g/cm^3之间波动，趋于稳定。气干纤维长度在797.84～1396.34μm，其径向变异模式属Panshin Ⅰ类型。香椿生长轮宽度、木材气干密度和纤维长度与树龄呈极显著的相关关系。香椿生长轮宽度、木材气干密度和纤维长度两两之间也呈极显著的相关性。经过有序样本聚类，界定出香椿的幼龄材与成熟材的界限为13～15年。[结论]为香椿人工林速生丰产、定向培育、材质改良、营林技术和木材的加工利用提供理论依据。
[Objective] The research aimed to study the radial variations of growth ring width, air-dried wood density and fiber length of Toona sinensis （A.Juss.）Roem. and their relativity. [Methed] The growth ring width air-dried, wood density and fiber length were determined by the growth ring timber character analysis theory. The models of the growth ring width air-dried, wood density and fiber length by tree ages were fitted by SPSS 13.0. [Result] The results showed that the average growth ring width of 32 year old Toona sinensis （A.Jnss.）Roem. was 1.382 cm, and the maximum was at 9^th year, it was 2.217 cm. The growth ring width began stabilization at 21^th - 31^th year, ranged from 0.683 cm to 1.000 cm. The air-dried wood density and fiber length of Toona sinensis （A.Juss.）Roem. added by the increase of tree age. The average air-dried wood density was 0.475 g/cm^3, at 17^th year it was 0,543 g/cm^3, then it went to stabilization, ranged from 0.507 g/cm^3 to 0.564 g/cm^3. The fibre length was 797.84 - 1 396.34/μm, and the radial variation type belonged to Panshin Ⅰ. The correlativity between the growth ring width, air-dried wood density, fiber length and the tree ages of Toona sinensis （A.Jnss.）Roem. was prominent（P 〈0.01）, and the growth ring width, the air-dried wood density and the fiber length of Toona sinensis （A.Jnss.） Roem. had prominent correlativity each other（ P 〈 0.01 ）. The results of swath clustering showed that the boundary lined of juvenile wood and maturate wood were 13^th - 15^th year. [Conclusion] The study provided the theoretical basis for the fast growing and high yield, directive breeding, wood improvement, silviculture teechnique and the processing and utilization of wood of Toona sinensis （A.Jnss.）Roern. plantation.
出处
《安徽农业科学》
CAS
北大核心
2009年第5期1976-1978,共3页
Journal of Anhui Agricultural Sciences
基金
贵州省林业厅林业科技项目
关键词
香椿
生长轮宽度
气干密度
纤维长度
径向变异
相关性
Toona sinensis （A,Juss.）Roem.
Ring width
Air-dired wood density
Fiber length
Radial variation
Relativity
