Journal of the Korean Wood Science and Technology
- Volume 21 Issue 2
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- Pages.73-80
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- 1993
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- 1017-0715(pISSN)
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- 2233-7180(eISSN)
Changes in Cellular Characteristics and Qualities of Matured and Juvenile Wood from Reforested Tree of Pinus koraiensis
잣나무 조림목(造林木)의 조직특성(組織特性)의 변동(變動)과 성열재(成熱材)·미성열재(未成熱材)의 재질(材質)
- Kang, Sun-Koo (Forestry Research Institute)
- 강선구 (임업연구원)
- Received : 1993.06.08
- Published : 1993.06.30
Abstract
Pinus koraiensis is one of the most important reforestation species which had widely been planted around the country. Therefore, there are great research needs on the fundamental properties of wood to extend the frequency of uses and adequate availabilities. Research results on the characteristics of anatomical wood properties and changes are summarized as follows: 1. At a horizontal direction of tree trunk, the tracheid length at outer wood gradually becomes shorter as it reaches to pith. The tracheid length having between 32 and 42 annual rings showed over 2.5 times longer than that of pith, and also its length increases from the bottom to the top of the stem. 2. The tracheid diameters in latewood showed a little fluctuations, and the shortest near to the pith in earlywood. The tracheid diameters in earlywood are more than 2 times those of latewood, and the differences between the mature and juvenile wood in earlywood are less than 10
Keywords
- Pinus koraiensis;
- tracheid wali thickness;
- mature and juvenile wood;
- fibril angle;
- structural boundaries