Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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The Adequacy Assessment and Growth Effects by Methods of 1st Thinning in Chamaecyparis obtusa Forest

편백림의 1차 솎아베기 방법에 따른 생장효과와 적절성 연구

  • Park, Joon Hyung (Forest Biomaterials Research Center, National Institute of Forest Science) ;
  • Son, Yeong-Mo (Forest Biomaterials Research Center, National Institute of Forest Science) ;
  • Lee, Kwang Soo (Warm-Temperate and Subtropical Forest Research Center, National Institute of Forest Science) ;
  • Park, Eun Jung (Forest Biomaterials Research Center, National Institute of Forest Science) ;
  • Jung, Su Young (Warm-Temperate and Subtropical Forest Research Center, National Institute of Forest Science)
  • 박준형 (국립산림과학원 산림바이오소재연구소) ;
  • 손영모 (국립산림과학원 산림바이오소재연구소) ;
  • 이광수 (국립산림과학원 난대아열대산림연구소) ;
  • 박은정 (국립산림과학원 산림바이오소재연구소) ;
  • 정수영 (국립산림과학원 난대아열대산림연구소)
  • Received : 2019.04.03
  • Accepted : 2019.06.10
  • Published : 2019.09.30
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Abstract

This study examines the effect of thinning in terms of changes in the growth characteristics of Chamaecyparis obtusa stands after they were thinned with varying intensity in Gochang, North Jeolla Province, Korea. Thinning was carried out in 2000 on Chamaecyparis obtusa stands (22 years old), and the stands were categorized in terms of the thinning intensity in the experiment: very heavy, heavy, medium, light, and control. The results of monitoring up to 2018 revealed that the diameter at breast height and the growth rate of individual trees after thinning had a positive correlation with the thinning intensity, whereas the stand volume showed a negative correlation. The height to diameter (H/D) ratio decreased by up to 70-80 due to the increased diameter at breast height after thinning and thereby resulted in better quality. The relative yield index right after the first thinning was between 0.75 and 0.95, which suggests the best timing for the first thinning had been missed. This study's findings are expected to serve as a basic reference in establishing the thinning system for Chamaecyparis obtusa forests.

본 연구는 전북 고창지역 편백 임분의 솎아베기 강도 처리 이후 해당 임분의 생장특성의 변화를 통해 시업 효과를 분석하고자 하였다. 솎아베기는 2000년(22년생)에 시행하였고, 솎아베기 강도에 따라 극강도구, 강도구, 중도구, 약도구, 대조구 등 총 5가지 시험 처리를 하였다. 2018년까지 모니터링을 한 결과, 솎아베기 후 개체목의 흉고직경 및 재적 생장량은 솎아베기 강도에 정의 관계를 보였고, 임분 재적의 경우 부의 관계가 나타났다. 형상비(H/D)는 흉고직경 생장량의 증가로 인해 약 70~80까지 낮아져 임목 형질 개선효과가 나타났으나, 2018년 현재는 다시 증가한 상태로 조사되었다. 1차 솎아베기 직후 상대수확량지수(Ry) 0.75~0.95 사이로 나타나, 1차 솎아베기 적정 시기를 놓친 것으로 판단되었다. 본 연구의 결과는 향후 편백림의 솎아베기 시업 체계 구축에 있어서 기초자료로 활용이 될 것으로 기대된다.

Keywords

References

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