Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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Development of Local Stem Volume Table for Pinus densiflora S. et Z. Using Tree Stem Taper Model

수간곡선 모델을 이용한 소나무의 지방별 수간재적표 개발

  • 강진택 (국립산림과학원 기후변화연구센터) ;
  • 손영모 (국립산림과학원 기후변화연구센터) ;
  • 김소원 (국립산림과학원 기후변화연구센터) ;
  • 이선정 (국립산림과학원 기후변화연구센터) ;
  • 박현 (국립산림과학원 기후변화연구센터)
  • Received : 2014.10.31
  • Accepted : 2014.11.07
  • Published : 2014.12.30
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Abstract

Current volume tables might underestimate or overestimate the volumes of individual trees in a specific region because the tables were made using the data from broad regions within South Korea. Therefore, to solve this problem, this study was conducted to develop local stem volume tables reflecting the local growth pattern and properties using stem taper equations in the regions of Hongcheon and Yeongju. We developed the local stem volume table for Pinus densiflora, which is the widely planted species in South Korea. To derive the most suitable taper equation for estimating the stem volume of region, three models of Max & Burkhart, Kozak and Parresol et al. were applied and their fitness were statistically analyzed by using the Fitness Index, Bias, and Standard Error of Bias. The result showed that there is a significant difference among the three models, and the Fitness Index of the Kozak model was highest compared to the other models. Therefore, the Kozak model was chosen for generating stem taper equation and stem volume tables for P. densiflora. The result from the developed stem volume tables of each region was compared to the current stem volume tables with driven by the data of tree growth obtained throughout the nation. The result showed that there is a significant difference (0.000< ${\alpha}=0.05$) in two regions, Hongcheon and Yeongju, and also there is a significant difference (0.000< ${\alpha}=0.05$) between the two regions.

현재 사용하고 있는 임목 재적표는 전국 공용으로 제작되어 있기 때문에, 특정 지역에 적용할 경우 재적을 과소 또는 과대 추정하는 문제점을 가지고 있다. 따라서, 본 연구는 이러한 문제점을 해결하기 위하여 수간곡선식을 이용하여 지역의 재적생장을 잘 반영할 수 있도록 홍천과 영주지역의 지방별 임목 수간재적표를 개발하고자 수행하였으며, 우리나라에서 가장 많은 분포를 보이고 있는 소나무를 대상으로 개발하였다. 추정에 적합한 수간곡선식의 도출을 위해서 Max & Burkhart, Korzak 그리고 Parresol et al.의 세 가지 수간곡선 모델을 적용하였으며, 적합도, 편의, 잔차의 표준 오차 등의 통계량을 분석하여 각 모델의 적합성을 평가하였다. 그 결과 3개의 수간곡선 모델간에는 정확성에 대한 유의적인 차이가 없으나, 소나무의 수간생장을 표현하는 데에는 Kozak 모델이 가장 적합한 것으로 나타났다. 따라서 Kozak 모형을 이용하여 소나무의 지방별 수간재적표를 조제하였다. 새롭게 개발된 지방별 수간재적표와 전국단위의 소나무 수간재적표와 비교한 결과, 홍천과 영주 2지역 모두에서 현재 재적표보다 재적이 높은 것으로 나타났으며(0.000< ${\alpha}=0.05$), 또한 두 지역간 지방별 재적표의 재적에서도 통계적으로 유의한 차이를 보였고(p-value: 0.000< ${\alpha}=0.05$) 홍천이 영주에 비해 재적이 높게 나타났다.

Keywords

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