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Evaluation of Major Taper Equation Models for Developing a Stem Volume Table of Cryptomeria japonica in Jeju Island

제주도 삼나무 수간재적표 개발을 위한 주요 수간곡선식 비교

  • Hyun-Soo, Kim (Warm Temperate and Subtropical Forest Research Center, National Institute of Forest Science) ;
  • Su-Young, Jung (Warm Temperate and Subtropical Forest Research Center, National Institute of Forest Science) ;
  • Kwang-Soo, Lee (Warm Temperate and Subtropical Forest Research Center, National Institute of Forest Science)
  • 김현수 (국립산림과학원 난대.아열대산림연구소) ;
  • 정수영 (국립산림과학원 난대.아열대산림연구소) ;
  • 이광수 (국립산림과학원 난대.아열대산림연구소)
  • Received : 2022.09.21
  • Accepted : 2022.10.05
  • Published : 2022.11.30

Abstract

This study was conducted to provide data and stem information to establish a local volume table of Cryptomeria japonica in Jeju Island. Stem analysis was performed on 26 trees by selecting two average trees from each site of the 13 plots of C. japonica stands in 2021 and 2022. During the analysis stage, one outlier tree was rejected, and a total of 260 observations of the specific stem height of 25 trees were used. Of the seven major taper equation models applied for parameter estimation and statistical verification, the Muhairwe 1999 model was found to be the best fit and selected as the optimal model. Stem shape-related estimates were acquired through the selected model, and sectional measurements according to the Smalian formula applied at an interval of 10 cm from the height of the stem were used to develop a volume table. A paired t-test comparison between the C. japonica volume obtained from the present study and those selected from the current yield table by NIFoS(2020), revealed significant differences (p<0.05), highlighting the necessity of a local volume table for C. japonica in Jeju Island.

Keywords

Acknowledgement

본 연구는 산림청 일반연구사업(과제번호: SC0600-2021-01)의 일부 지원으로 이루어진 것입니다.

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