刺槐次生灌木幼林木纤维形态研究

Morphological studies on wood fiber of young secondary Robinia pseudoacacia L. bush forest

以刺槐次生灌木幼林1～4 a生枝条为试验材料,按树龄分4组,每组采30个样条,构成120个单元的大样本.经处理对木纤维的长度、宽度、壁厚、腔径、长宽比、壁腔比进行显微镜观测和分析.结果表明,不同树龄间诸特征差异极显著,3 a生刺槐木纤维长度、宽度、壁厚极显著优于其它年份.不同树龄刺槐木纤维壁腔比均小于1,2～4 a生刺槐木纤维长宽比均大于45,可认为此类刺槐林2～4 a生适宜做纸浆材,并以99%的可靠性确定其轮伐期为3 a.

Taking 1～4 years trees of young secondary Robinia pseudoacacia L.bush forest as objects,dividing them into 4 groups by age,each group having 30 samples and constructing 120 units in all,this study observes the wood fiber＇s length,width,wall thickness,lumen diameter,ratio of length to width,ratio of wall to lumen.The results of variance analysis and multiple comparison show： the variation of the wood fibers among R.pseudoacacias at different ages is notable;The wood fiber of triennial R.pseudoacacia is the longest,widest and thickest;The wood fiber＇s ratio of wall to lumen of different tree ages＇ R.pseudoacacia is less than 1;The wood fiber＇s length-width ratios of 2～4 years of R.pseudoacacia all exceed 45.Therefore,2～4 years of such R.pseudoacacia is the most suitable paper making material,and the circulation period is determined as 3 years with a 99% reliability.