Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Development of a Stem Taper Equation and a Stem Table for Criptomeria japonica Stands in South Korea

삼나무의 수간곡선식 및 입목수간재적표 개발

  • Ko, Chi-Ung (Division of Forest Industry Research, National Institute of Forest Science) ;
  • Lee, Seung-Hyun (Division of Forest Industry Research, National Institute of Forest Science) ;
  • Lee, Sun-Jung (Division of Forest Industry Research, National Institute of Forest Science) ;
  • Kim, Dong-Geun (Department of Ecology and Environment System, Kyungpook University) ;
  • Kang, Jin-Taek (Division of Forest Industry Research, National Institute of Forest Science)
  • 고치웅 (국립산림과학원 산림산업연구과) ;
  • 이승현 (국립산림과학원 산림산업연구과) ;
  • 이선정 (국립산림과학원 산림산업연구과) ;
  • 김동근 (경북대학교 생태환경시스템학과) ;
  • 강진택 (국립산림과학원 산림산업연구과)
  • Received : 2020.08.13
  • Accepted : 2020.09.11
  • Published : 2020.12.31
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Abstract

The aim of this study was to utilize Kozak's stem taper model to develop both a stem taper equation and a stem volume table for Criptomeria japonica, a tree species distributed across Korea. A total of 1,000 sample trees were cut and collected across the country to measure their diameters by stem height. The equation was then used to estimate examine their stem shapes. Our results show that the Fitness Index for the equation was 98.7%, the Mean Absolute Deviation (MAD) was -0.0142, and the MAD was 1.1640, thus indicating a high level of fitness. A statistically significant difference (p < 0.05) was also found from the analysis of discrepancies between a current table and the new table used in this study. It is therefore suggested that the new table-with data from actual stands-will contribute to enhancing the accuracy of national and municipal forest statistics and reducing losses caused by imprecise data on available forest resources.

본 연구는 정확도가 높은 Kozak 수간곡선모델을 이용하여 전국에 분포한 삼나무의 수간곡선식 및 입목수간재적표를 개발하고자 수행되었다. 이를 위해 전국에 분포하는 총 1,000본의 삼나무 표본목을 벌채하여 수간고별 직경을 측정하고 수간 형상을 파악할 수 있는 수간곡선식을 추정하였다. 추정한 모델의 통계적 적합도지수는 98.7%로 나타났고 편차는 -0.0142, 평균절대편차는 1.1640로 높은 적합도를 보였다. 또한 현행재적표와 신규재적표의 재적은 통계적으로 유의적인 차이를 보였다(p<0.05). 새롭게 개발된 재적표는 현실림을 반영한 것으로, 국가 및 지자체의 산림통계 정확도 향상과 목재 자원량 평가 시 발생할 수 있는 경제적 손실 방지에 기여할 것으로 판단된다.

Keywords

References

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