Tracheid Length and Microfibril Angle of Young Taiwania Grown Under Different Thinning and Pruning Treatments


  • Chih-Ming Chiu
  • Cheng-Jung Lin
  • Song-Yung Wang


Thinning, pruning, tracheid length, microfibril angle, Taiwania


The effects of different thinning and pruning methods on the tracheid length and microfibril angle of young Taiwania (Taiwania cryptomerioides Hay) were investigated. No significant differences were found for tracheid length and microfibril angle among the three thinning and pruning treatments. The tracheid length increases outwards from the pith. The radial variation in microfibril angle is high near the pith, and declines gradually towards the cambium. The tracheid length values increase with decreasing microfibril angle.


Anagnost, S. E., R. E. Mark, and R. B. Hanna. 2000. Utilization of soft-rot cavity orientation for the determination of microfibril angle. Part I. Wood Fiber Sci. 32(1):81-87.nAnagnost, S. E., R. E. Mark, and R. B. Hanna. 2002. Variation of microfibril angle with individual tracheids. Wood Fiber Sci. 34(2):337-349.nBonham, V. A., and J. R. Barnett. 2001. Fibre length and microfibril angle in silver birch (Betula pendula Roth). Holzforschung 55(2):159-162.nChern, J. H. 1994. A model of computer aided identification for anatomical characteristics of coniferous woods. Dissertation, Dept. of Forestry, National Taiwan University, Taiwan, Pp. A113.nChiu, C. M., C. J. Lin, C. N. Lo-Cho, and Y. C. Chen. 2002. Effects of thinning and pruning on the growth of Taiwania plantation in Liu-Kuei area. Tawian Quart. J. Chin For. 35(1):43-54.nDebell, D. S., R. Singleton, C. A. Harrington, and B. L. Gartner. 2002. Wood density and fiber length in young Populus stems: Relation to clone, age, growth rate, and pruning. Wood Fiber Sci. 33(4):539-539.nKoga, S., J. Tsutsumi, K. Oda, and T. Fujimoto. 1996. Effects of thining on basic density and tracheid length of Karamatsu (Larix leptolepis). Mokuzai Gakkaishi 42(6):605-611.nKoga, S., K. Oda, J. Tsutsumi, and T. Fujimoto. 1997. Effect of thinning on the wood structure in annual growth rings of Japanese larch (Larxi leptolepsis). IAWA J. 18(3): 281-290nLichtenegger, H., A. Reiterer, S. E. Stanzl-Tschegg, and P. Fratzl. 1999. Variation of cellulose microfibril angles in softwoods and hardwoods—A possible strategy of mechanical optimization. Struct. Biol. J. 128:257-269.nLima, J. T., M. C. Breese, and C. M. Cahalan. 2004. Variation in microfibril angle in Eucalyptus clones. Holzforschung 58:160-166.nMacdonald, E., and J. Hubert. 2002. A review of the effects of silviculture on timber quality of Sitka spruce. For. 75(2):107-138.nMarkstrom, D. C., H. E. Troxell, and C. E. Boldt. 1983. Wood properties of immature ponderosa pine after thinning. Forest Prod. J. 33(4):33-36.nMeylan, B. A., and M. C. Probine. 1969. Microfibril angle as a parameter in timber quality assessment. Forest Prod. J. 19(4):30-34.nMott, L., L. Groom, and S. Shaler. 2002. Mechanical properties of individual southern pine fibers. Part II. Comparison of earlywood and latewood fibers with respect to tree height and juvenility. Wood Fiber Sci. 34(2): 221-237.nNakada, R., Y. Fujisawa, and Y. Hirakawa. 2003. Effects of clonal selection by microfibril angle on the genetic improvement of stiffness in Cryptomeria japonicaD. Don. Holzforschung 57:553-560.nSaren, M. T., R. Serimaa, S. Andersson, T. Paakkari, P. Saranpaa, and E. Pesonen. 2001. Structural variation of tracheids in Norway spruce (Picea abies [L.] Karst.). Struct. Biol. J. 136:101-109.nSenft, J. F., and B. A. Bendtsen. 1985. Measuring microfibrillar angles using light microscopy. Wood Fiber Sci. 17(4):564-567.nSirvio, J., and P. Kärenlampi. 2001. The effects of maturity and growth rate on the properties of spruce wood tracheids. Wood Sci. Technol. 35(5):541-554.nTaylor, F. W., and J. D. Burton. 1982. Growth ring characteristics, specific gravity, and fiber length of rapidly grown loblolly pine. Wood Fiber Sci. 14(3):204-210.nWang, H. H., J. G. Drummond, S. M. Reath, K. Hunt, and P. A. Watson. 2001. An improved fibril angle measurement method for wood fibres. Wood Sci. Technol. 34(4):493-503.nWang, S. Y., C. M. Chiu, and C. J. Lin. 2003a. Application of the drilling resistance method for annual ring characteristics evaluation of Taiwania (Taiwania cryptomerioides Hay.) trees grown in different thinning and pruning treatments. J. Wood Sci. 49(2):116-124.nWang, S. Y., C. J. Lin, and C. M. Chiu. 2003b. Effects of thinning and pruning on knots and lumber recovery of Taiwania (Taiwania cryptomerioides Hay.) planted in the Liu-Kuei area. J. Wood Sci. 49(5):444-449.nYang, K. C. 2002. Impact of spacing on juvenile wood and mature wood properties of white spruce. Taiwan J. For. Sci. 17(1):13-29.nZobel, B. J., and J. R. Sprague. 1998. Juvenile wood in forest trees. Spring-Verlag, Berlin, Germany. Pp. 21-22; 26-38; 88-89.nZobel, B. J., and J. P. van Buijtenen. 1989. Wood variation its cause and control. Springer-Verlag, Berlin, Germany. Pp. 218-248.n






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