Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Methodological Consideration for Estimating Growing Stock of Young Forests based on Early Growth Characteristics of Standing Trees in Korea

우리나라 입목의 초기 생장 특성에 따른 유령림의 임목축적 산출방안 고찰

  • Moon, Ga Hyun (Division of Forest Industry Research, National Institute of Forest Science) ;
  • Moon, Na Hyun (Department of Forest, Environment, and System, Kookmin University) ;
  • Yim, Jong Su (Division of Forest Industry Research, National Institute of Forest Science) ;
  • Kang, Jin Taek (Division of Forest Industry Research, National Institute of Forest Science)
  • 문가현 (국립산림과학원 산림산업연구과) ;
  • 문나현 (국민대학교 산림환경시스템학과) ;
  • 임종수 (국립산림과학원 산림산업연구과) ;
  • 강진택 (국립산림과학원 산림산업연구과)
  • Received : 2020.07.17
  • Accepted : 2020.09.01
  • Published : 2020.09.30
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Abstract

The growing stocks of young forests that are less than10 years of age have been excluded from the Korean forest resource statistics, despite the existence of standing trees; however, sustainable forest management and carbon removals in the forestry section require complete information regarding forest resources. This study developed a method to estimate the growing stocks for young forests from National Forest Inventory (NFI) data. After reviewing previous research on growth characteristics for young forests, we conducted stem analysis of major species, and examined stand characteristics by site index, based on real yield tables. Our statistical analysis results showed that there were few standing trees with diameters at breast height (DBH) above 6 cm in young stands, and that it would have taken 12 years, on average, to reach 6 cm DBH. This suggests that mean tree height by diameter should be assessed at the root, in order to assess growing stocks for young stands through the NFI. Moreover, the database system should be improved to differentiate tree species, since diverse shrubs, including trees, have been surveyed.

우리나라의 산림자원 중 유령림에 포함되는 I 영급(10년생 이하)은 입목이 존재함에도 불구하고 임목축적을 '0'으로 가정하여 국가통계를 산출하고 있으며, 온실가스 배출 및 흡수량 산정을 위한 탄소흡수량에서도 누락되고 있다. 지속가능한 산림경영의 이행 및 산림부문 탄소저장량을 산출하기 위해서는 유령림의 산림자원에 대한 정확한 통계정보의 수집이 필요하다. 본 연구는 유령림의 초기 생장 특성을 파악하고 국가산림자원조사에서 수집된 자료를 활용하여 유령림의 임목축적을 추정할 수 있는 방법을 개발하기 위하여 수행하였다. 유령림의 초기 생장 특성을 분석하기 위하여 유령림의 초기 생장에 관한 문헌조사, 수종별 수간석해 분석 및 현실림 임분수확표에 의한 지위지수별 유령림의 생장 특성 등을 분석하였다. 결과적으로 유령림에서 대부분의 입목은 흉고직경 6 cm 미만으로 나타났으며, 흉고직경 6 cm에 도달하는데 평균 12년이 소요되는 것으로 분석되었다. 국가산림자원조사 자료를 활용하여 유령림의 임목축적을 산출하기 위해서는 치수조사구에서 근원경의 경급별 평균묘고가 조사되어야 하며, 교목을 비롯한 다양한 관목이 조사되고 있으므로 교목 수종을 구분할 수 있도록 분석시스템의 개선이 필요한 것으로 나타났다.

Keywords

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