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榉树木材的发育解剖学研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2003年03期
Page:
42-42
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
An Anatomic Study on the Wood Development of Zelkova schneideriana
Article ID:
1000-2006(2003)03-0042-01
Author(s):
ZHAO WangtuGAN XiaohongDING Yulong*
College of Forest Resources and Environment Nanjing Forestry University,Nanjing 210037,China
Keywords:
Zelkova schneiderianaWoodDevelopmental anatomy
Classification number :
S781.1
DOI:
10.3969/j.jssn.1000-2006.2003.03.009
Document Code:
A
Abstract:
With several methods,the developmental anatomy of the wood of Zelkova schneideriana was studied.The results are as follows:The wood of Zelkova schneideriana is ring porous,and its annual ring is very distinct.The pore pattern of the early wood is ring arrangment which is composed of 1~2 rows vessel elements,and the pore pattern of the late wood is pore cluster which is composed of many spiral vascular tracheid and small vessel elements.The fibers are radially arranged.The content of fiber in sap wood is less than that in hearty wood,which indicate that the rate of different tissues differentiated from cambium varies in different growth periods.The wood ray is heterogeneous and multiseriate ray.The main parts are made up of procumbent cells,and the marginal ray cells are squared cells or upright cells that form the end of their uniseries.The axial parenchyma is vasicentric.Vascular tracheid has spiral thickening.Vessels of hearty wood have tyloses,which strengthen the character of corroderesistant and guarantee the fine character of wood of Zelkova schneideriana.The tree grows relative quickly in former 30 years,and its annual ring is 3.57 mm wide in average.After 30 years,the width of annual ring decreases dramatically.Its mean width is 1.17 mm.This result may be closely related to the individual examined tree.

References

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Last Update: 1900-01-01