Skip to main content

Advertisement

Official Journal of the Japan Wood Research Society

Journal of Wood Science Cover Image

Compressive strength of young Taiwania (Taiwania cryptomerioides) trees grown with different thinning and pruning treatments

Article metrics

  • 93 Accesses

  • 8 Citations

Abstract

Taiwania (Taiwania cryptomerioides Hay) is an important timber species in Taiwan. Growth in generally improved trees under intense silvicultural practice is so rapid that rotations or the practice of thinning trees may be as short as 20–30 years. Thus, the wood properties of young plantation trees need to be characterized to effectively use this resource. The effects of different thinning and pruning methods on the compressive strength parallel to grain of young Taiwania trees were explored. Average compressive strengths with various thinning treatments revealed the trend of no thinning > medium thinning > heavy thinning and in the pruning treatments showed the trend of medium pruning > no pruning > heavy pruning. However, most results showed no statistically significant differences among thinning and pruning treatments.

References

  1. 1.

    Chou C (1998) Effects of age on strength properties of Taiwania plantation wood. Taiwan J For Sci 13:119–125

  2. 2.

    Wang SY, Chiu CM, Lin CJ (2003) 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 49:116–124

  3. 3.

    Wang SY, Lin CJ, Chiu CM (2003) Effects of thinning and pruning on knots and lumber recovery of Taiwania (Taiwania cryptomerioides Hay.) planted in the Lu-Kuei area. J Wood Sci 49:444–449

  4. 4.

    Wang SY, Lin CJ, Chiu CM (2005) Evaluation of wood quality of Taiwania trees grown with different thinning and pruning treatments using the ultrasonic-wave method. Wood Fiber Sci 37:192–200

  5. 5.

    Wang SY, Lin CJ, Chiu CM, Chen JH, Yung TH (2005) Dynamic modulus of elasticity and bending properties of Taiwania young trees grown with different thinning and pruning treatments. J Wood Sci 51:1–6

  6. 6.

    Watanabe H, Tsutsumi J, Matsumoto T, Ohta S (1964) Studies on juvenile wood. II. On distribution of specific compressive strength and specific modulus of elasticity in stem of sugi-tree Cryptomeria japonica D. Don. Mokuzai Gakkaishi 10:125–130

  7. 7.

    Bendtsen BA, Senft J (1986) Mechanical and anatomical properties in individual growth rings of plantation-grown eastern cotton-wood and loblolly pine. Wood Fiber Sci 18:23–38

  8. 8.

    Bao FC, Jiang ZH, Jiang XM, Lu XX, Luo XQ, Zhang SY (2001) Differences in wood properties between juvenile wood and mature wood in 10 species grown in China. Wood Sci Technol 35:363–375

  9. 9.

    Kasal B (2003) Semi-destructive method for in-situ evaluation of compressive strength of wood structural members. Forest Prod J 53:55–58

  10. 10.

    MEA (1981) Method of test for compression of wood. Bureau of standards, metrology and inspection, Ministry of Economic Affairs (MEA), CNS453

  11. 11.

    Chiu CM, Lin CJ, Wang SY (2005) Tracheid length and microfibril angle of young taiwania grown under different thinning and pruning treatments. Wood Fiber Sci 37:437–444

  12. 12.

    Chiu CM, Wang SY, Lin CJ, Yang TH, Jane MC (2006) Application of the fractometer for crushing strength: juvenile-mature wood demarcation in Taiwania (Taiwania cryptomerioids). J Wood Sci 52:9–14

  13. 13.

    Wang SY, Chiu CM (1993) Wood properties of Japanese cedar originated by seed and vegetative reproduction in Taiwan VI. Compression and bending properties. Mokuzai Gakkaishi 39:1128–1139

  14. 14.

    Cown DJ (1974) Comparison of the effects of two thinning regimes on some wood properties of radiata pine. NZ J For Sci 4:540–551

  15. 15.

    Erickson HD, Harrison AT (1974) Douglas-fir wood quality studies. V. Effects of age and stimulated growth on wood density and anatomy. Wood Sci Technol 8:207–226

  16. 16.

    Barbour RJ, Foyle DC, Chauret G, Cook JA, Karsh MB, Ran S (1994) Breast height relative density and radial growth in mature Jack pine (Pinus banksiana) for 38 years after thinning. Can J Forest Res 24:2439–2447

  17. 17.

    Nicholls JWP (1971) The effects of environmental factors on wood characteristics. 2. The effect of thinning and fertilizer treatment on the wood of Pinus pinaster. Silvae Genet 20:67–73

  18. 18.

    Cown DJ (1973) Effects of severe thinning and pruning treatments on the intrinsic wood properties of young radiata pine. NZ J For Sci 3:379–389

  19. 19.

    Trylor FW, Barton JD (1982) Growth ring characteristics, specific gravity, and fiber length of rapidly grown loblolly pine. Wood Fiber Sci 14:204–210

  20. 20.

    Moschler WW, Dougal EF, McRae DD (1989) Density and growth ring characteristics of Pinus taeda L. following thinning. Wood Fiber Sci 21:313–319

  21. 21.

    Megraw RA, Nearn WT (1972) Detailed DBH density profiles of several trees from Douglas-fir fertilizer/thinning plots. Proceedings of Symposium on the Effect of Growth Acceleration on the Properties of Wood. Madison, WI, USDA Forest Service

  22. 22.

    Zobel BJ, van Buijtenen JP (1989) Wood variation its cause and control. Springer, Berlin Heidelberg New York, pp 218–248

  23. 23.

    Lin CJ, Wang SY, Chiu CM (2004) Assessment of compressive strength in Taiwania using the Fractometer. Taiwan Forest Prod Ind 23:23–31

  24. 24.

    Zobel BJ, Sprague JR (1998) Juvenile wood in forest trees. Springer, Berlin Heideberg New York, pp 26–38

  25. 25.

    Kaya F, Smith L (1993) Variation in compression strength and some related properties of a red pine. Wood Sci Technol 27:229–239

Download references

Author information

Correspondence to Song-Yung Wang.

Rights and permissions

Reprints and Permissions

About this article

Key words

  • Taiwania
  • Compressive strength
  • Thinning
  • Pruning