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Thinning Intensity and Growth Response in a Quercus acuta Stand

붉가시나무림의 솎아베기 강도에 따른 생장 반응 효과

  • Jung, Su Young (Southern Forest Resources Research Center, National Institute of Forest Science) ;
  • Ju, Nam Gyu (Southern Forest Resources Research Center, National Institute of Forest Science) ;
  • Lee, Kwang Soo (Southern Forest Resources Research Center, National Institute of Forest Science) ;
  • Yoo, Byung Oh (Southern Forest Resources Research Center, National Institute of Forest Science) ;
  • Park, Yong Bae (Southern Forest Resources Research Center, National Institute of Forest Science) ;
  • Yoo, Seok Bong (Forest Resources Research Institute of Jeollanam-do) ;
  • Park, Joon Hyung (Southern Forest Resources Research Center, National Institute of Forest Science)
  • 정수영 (국립산림과학원 남부산림자원연구소) ;
  • 주남규 (국립산림과학원 남부산림자원연구소) ;
  • 이광수 (국립산림과학원 남부산림자원연구소) ;
  • 유병오 (국립산림과학원 남부산림자원연구소) ;
  • 박용배 (국립산림과학원 남부산림자원연구소) ;
  • 유석봉 (전라남도 산림자원연구소) ;
  • 박준형 (국립산림과학원 남부산림자원연구소)
  • Received : 2015.08.14
  • Accepted : 2015.10.17
  • Published : 2015.12.31

Abstract

This study was examined for the growth response of tree diameter and volume to thinning treatments from different thinning intensities using three long-term thinning trials for Japanese Evergreen Oak (Quercus acuta Thunb.) stands in Wando island, Korea. After thinning in 1999, annual tree growth of diameter and volume was highest in heavy thinned stands for individual tree and this growth pattern of thinning response showed similar tendency to the individual tree growth response in light thinned stands. By increasing diameter growth, the value of H/D ratio (HDR) as an indicator of stem form was properly decreased and improved up to 80%. Although there is significant growth response of basal area in both heavily and lightly thinned stands, the growth potential both of heavily and lightly thinned stands in total stand volume is not likely to reach at the level of unthinned stands because of basal area growth loss associated with both light and heavy thinnings.

본 연구는 전남 완도 붉가시나무림의 솎아베기 강도 처리에 따른 임분의 생장반응 특성을 비교 분석하였다. 1999년 솎아베기 후 연년 직경 생장량과 연년 재적 생장량에서 강도구의 효과가 가장 큰 것으로 나타났고, 약도구 또한 비슷한 수준의 효과가 있었다. H/D율은 DBH 생장량의 증가로 인해 약 80%까지 임목 형질 개선효과가 나타났다. 솎아베기 이후 강도구와 약도구의 임분 흉고단면적 총 생장량이 증가하는 경향으로 나타났으나, 간벌구의 손실로 말미암아 임분 흉고단면적은 대조구의 생장량 수준까지 장차 회복하기는 어려울 것으로 예측되었다.

Keywords

Acknowledgement

Grant : 남부 주요 수종의 자원화를 위한 조성?관리 기술 개발

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