摘要
以萌生毛白杨为对照,研究伐根嫁接毛白杨的木材解剖特性及其径向和轴向的变异规律。结果表明:培育方式对毛白杨微观特性的径向变异和轴向变异有不同程度的影响。伐根嫁接的纤维和导管的长度、宽度略高,微纤丝角和壁腔比略低,组织比量差异不大。纤维长宽和导管长宽的径向变异从髓心向外迅速增加,而后趋于平缓;微纤丝角和壁腔比随着树龄的增大先减小后呈波动性变化,组织比量整体变化趋势不大。轴向变异规律:纤维长度和宽度随着树高的增加而减小,导管分子先增加后减小,壁腔比呈递增趋势,微纤丝角先减小后增加,但是整体变化幅度较小。组织比量围绕一个数值波动,整体变化较小。通过方差检验,两种培育方法毛白杨的纤维宽度和微纤丝角径向变异规律差异显著(P<0.05)。不同高度的伐根嫁接和萌蘖繁殖毛白杨之间的纤维长度和导管长度差异显著(P<0.05)。
A comprehensive analysis on the anatomical properties and their variation patterns between stump grafting Populus to-mentosa and sprouting reproduction Populus tomentosa were conducted .The cultivation methods exited different effects about radial variation and axial variation in anatomical properties of Populus tomentosa.Compared with sprouting reproduction Pop-ulus tomentosa, stump grafting trees owned higher fiber length and width , higher vessel length and width , lower microfibril-lar angle and wall to lumen ratio , and there were fewer differences within tissue proportion .There were an initially rapid and then gentle increase of fiber length and width , vessel length and width from heart-centre to outward , at last tended to stable.While microfibrillar angle and wall to lumen ratio gradually decreased and then changes in volatility .Tissue propor-tion exited some changes .The axial variation showed a decrease of fiber length and width with tree height increasing , while wall to lumen ratio increased .Vessel length and width increased and then decreased .Microfibrillar angle decreased first and then increased but changed generally little. Tissue proportion was based on a numerical wave .The variance verification showed there were significant differences in the radial variation of fiber width and microfibrillar angle .There were also sig-nificant differences in fiber length and vessel length with different tree height .
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2014年第8期82-85,89,共5页
Journal of Northeast Forestry University
关键词
伐根嫁接
萌蘖繁殖
毛白杨
解剖性质
Stump grafting
Sprouting reproduction
Populus tomentosa
Anatomical properties
