Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
권호 표지
DOI QR코드

DOI QR Code

Bending and Compressive Strength Properties of Larix kaempferi According to Thinning Intensity

간벌강도에 따른 낙엽송의 휨 및 종압축강도성능

  • Chong, Song-Ho (Forest Training Institute, Korea Forest Service) ;
  • Won, Kyung-Rok (College of Agriculture & Life Science, IALS, Gyeongsang National University) ;
  • Hong, Nam-Euy (College of Agriculture & Life Science, Gyeongsang National University) ;
  • Park, Byung-Su (Korea Forestry Promotion Institute) ;
  • Lee, Kyung-Jae (Forest Practice Research Center of the Korea Forest Research Institute) ;
  • Byeon, Hee-Seop (College of Agriculture & Life Science, IALS, Gyeongsang National University)
  • Received : 2014.02.25
  • Accepted : 2014.03.20
  • Published : 2014.07.25
Download PDF
⟨ Previous Next ⟩

Abstract

The purpose of this study was to determine the effects of plantation thinning on physical and mechanical properties of Larix kaempferi. Tree samples were obtained from unthinned, moderately, heavily thinned plantations where located in Kwangryung forest research stand. The effects of different thinning methods on the bending and parallel to grain compressive strengths of Larix kaempferi were explored. Average latewood ratio with various thinning treatments revealed the trend of unthinning < moderate thinning < heavy thinning treatment. Average annual ring width with various thinning treatments showed the trend of unthinning < moderate thinning or heavy thinning treatment. Average bending and parallel to grain compressive strengths with various thinning treatments revealed the trend of unthinning > moderate thinning > heavy thinning treatment. This indicates that thinning treatment reduces average bending and parallel to grain compressive strength properties.

우리나라의 중요한 조림 수종 중에서 낙엽송을 대상으로 하여, 간벌실시에 따른 물리 역학적 성질을 비교 평가함으로써 간벌 실시가 목재의 재질에 미치는 영향과 양질재 생산 및 목재의 효율적 이용을 위한 연구결과는 다음과 같다. 간벌정도에 따른 시료는 무간벌, 약도간벌, 강도간벌을 실시한 광릉시험림에서 벌채하여 사용하였다. 간벌 정도에 따른 평균 만재율은 무간벌 < 약도간벌 < 강도간벌의 경향이었고 평균 연륜폭은 무간벌 < 약도간벌 또는 강도간벌의 경향이었다. 간벌 정도에 따른 평균 휨강도는 무간벌 > 약도간벌 >강도간벌의 경향이었고 간벌 정도에 따른 평균 압축강도는 무간벌 > 약도간벌 >강도간벌의 경향이었다. 이러한 결과로 낙엽송은 간벌에 의하여 휨 및 종압축강도가 감소하는 경향이었다.

Keywords

References

  1. Bilgin Guller. 2007. The effects of thinning treatments on density, MOE, MOR and maximum crushing strength of Pinus brutia Ten. wood. Annals of forest science. 64: 467-475. https://doi.org/10.1051/forest:2007024
  2. Chong, S.H., Jung, D.J., Park, B.S., Chun, S.K. 2003. Effects of thinning on the timber quality of Pinus koraiensis grown in korea. Mokchae KongHak. 31(2): 16-23.
  3. Forest Research Institute. 1994. Wood properties and uses of the major tree species grown in Korea. Research Report of Forest Institute. 95: 124-125.
  4. Kim, J.Y. Lee, K.J. 2012. Vegetational structure and the density of thinning for the inducement of the ecological succession in artificial forest, National Parks1a. Journal of Ecology and Environment. 26(4): 604-619.
  5. Kim, M.I., Lee, W.K., Park, T.J., Kwak, H.B., Byun, J.Y., Nam, K.J., Lee, K.H., Son, Y.M., Won, H.K., Lee, S.M. 2013. Developing dynamic D.B.H. growth prediction model by thinning intensity and cycle - based on yield table data-. Journal of the Korean Forestry Society. (2): 266-278.
  6. Kim, D.K., Lee, H.J., Kim, J.W., Park, S.K. 1994. Effects of planting density and thinning intensity in grown of Korean pine. Research Report of Forest Institute. 50: 112-127.
  7. Kim, D.K., Kim, J.W., Park, S.K., Kim, T.O., Kim, I.H. 1988. Study on the first thinning method in 20 year-old plantations of Pinus koraiensis, Larix leptolepis, Pinus rigida and Pinus banksiana. Research Report of Forest Institute. 37: 1-7.
  8. Korea Forest Service. 2012. Statistical Yearbook of Forestry. 42: 88.
  9. Lee, C.H., Park, J.H., Kim, Y.C. 1997. Variations in properties and qualities of major plantation-grown softwoods in korea(I) - anatomical properties of Pinus koraiensis, Larix leptolepis, and Chamaecyparis obtusa. Mokchae Konghak. 25(2): 117-126.
  10. Lin, C.J., Wang, S.Y., Yang, T.H., Tsai, M.J. 2006. Compressive strength of young Taiwania (Taiwania cryptomerioides) trees grown with different thinning and pruning treatments. Journal of Wood Science. 52(4): 337-341. https://doi.org/10.1007/s10086-005-0771-2
  11. Nakai, K., Tanaka, S.S. 1984. Strength property of thinned small diameter wood. 39(5): 225-241.
  12. Nakai, K. 1984. Bending strength property of sugi planted in japan. Wood industry. 39(11): 552-556.
  13. Park, J.H., Kim, S.K., Lee, S.T., Lee, K.S., Kim, H.H. 2013. Thinning effect on vegetation structure and stand characteristics of oak stands. Journal of Agriculture & Life Science. 47(6): 81-89. https://doi.org/10.14397/jals.2013.47.6.81
  14. Wang, S.Y., Lin, C.J., Chiu, C.M., Chen, J.H., Yung, T.H. 2005. Dynamic modulus of elasticity and bending properties of young Taiwania trees grown with different thinning and pruning treatments. Journal of Wood Science. 51: 1-6. https://doi.org/10.1007/s10086-004-0622-6
  15. Won, K.R., Yoo, B.O., Lee, K.S., Jung, S.Y., Chong, S.H., Byeon, H.S. 2013. Nondestructive evaluation of strength property for damaged-black Pine wood(Pinus thunbergii) by Matsucoccus thunbergianae using free vibration mode. Journal of Agriculture & Life Science. 47(6): 53-59. https://doi.org/10.14397/jals.2013.47.6.53

Cited by

  1. Wood Properties of Quercus acuta due to Thinning Intensity vol.43, pp.6, 2015, https://doi.org/10.5658/WOOD.2015.43.6.721
  2. Mechanical Properties of Cryptomeria japonica by the Differences of Stand Characteristics in Southern Region of Korea vol.43, pp.3, 2015, https://doi.org/10.5658/WOOD.2015.43.3.320
  3. Physical and Mechanical Properties of Quercus serrata according to Stand Characteristics in Southern Region of Korea vol.42, pp.6, 2014, https://doi.org/10.5658/WOOD.2014.42.6.659
  4. Mechanical and Physical Wood Properties of Quercus serrata due to Damaged Stands in Southern Region of Korea vol.48, pp.6, 2014, https://doi.org/10.14397/jals.2014.48.6.133