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Annual Ring Formation in Major Wood Species Growing in Chuncheon, Korea(II) - Formation of Resin canals, Tyloses and Latewood -  

Kwon, Sung Min (College of Forest Sciences, Kangwon National University)
Kim, Nam Hun (College of Forest Sciences, Kangwon National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.33, no.6, 2005 , pp. 1-7 More about this Journal
Abstract
This study was carried out to investigate on the formation of resin canal, tylosis and latewood of the major species growing in Chuncheon. Two species of softwoods (Pinus densiflora and Pinus koraiensis) and two species of hardwoods (Quercus mongolica and Robinia pseudoacacia) were used in this experiment. The resin canals of P. densiflora and P. koraiensis were formed from the beginning through the middle of July and in the beginning of May, respectively. It is clear that the resin canal of P. koraiensis was formed much earlier than that of P. densiflora. The tylosis in vessel of Q. mongolica was formed in the middle of May, and the formation in R. pseudoacacia was in the end of May. The latewood in P. densiflora was formed in the middle of August. The latewood in P. koraiensis was formed from the end of September through the beginning of October. While latewood vessels in Q. mongolica were formed in the end of May, and those in R. pseudoacacia from the beginning of June through the middle of June. Consequently, the period of resin canals, tyloses and latewood formation was different among the sample trees, even though the trees were grown under the same conditions.
Keywords
annual ring formation; resin canal; tylosis; latewood; growth ring;
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