Effects of Wood Rays on the Shrinkage of Wood during the Drying Process

Qianwen Xue, Weisheng Sun, Kurt Fagerstedt, Xi Guo, Mingrui Dong, Wenbin Wang, Huimin Cao

Research output: Contribution to journalArticleScientificpeer-review


To elucidate the origin of shrinkage anisotropy of wood during the drying process, wood from three tree species, Quercus sp., Juglans nigra, and Pometia pinnata, was analyzed using thin cryomicrotome sections and sequential drying on a micro-scale. The data on shrinkage, based on the transverse direction, were calculated using Image Pro Plus software to measure the thickness of the cell wall of fibers. The results showed that: (1) In the tangential direction, the shrinkage of wood fibers were all in the "smallest-bigger-smaller (-bigger-smaller)" pattern from A to C (A: The cells closest to the wood rays; C: The cells in the middle between the wood rays) and fibers next to the rays always have the minimum shrinkage at different moisture contents; (2) the width of the rays has no negative correlation with the shrinkage of wood fibers; and (3) the rays have the same effect on the shrinkage of wood fiber cells in both latewood and earlywood. In addition, the shrinkage of latewood is more severe than that of earlywood, which leads to tangential shrinkage.
Original languageEnglish
Issue number3
Pages (from-to)7086-7095
Number of pages10
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed

Fields of Science

  • Shrinkage
  • Wood ray
  • Restraint
  • Anisotropy
  • Drying
  • 4112 Forestry

Cite this