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Allometric Equations for Crown Fuel Biomass of Pinus koraiensis Stands in Korea

잣나무림의 수관연료량 추정을 위한 상대생장식 개발

  • Kim, Sungyong (Department of Forest Resources, Kongju National University) ;
  • Jang, Mina (Department of Forest Resources, Kongju National University) ;
  • Lee, Byungdoo (Division of Forest Disaster Management, Korea Forest Research Institute) ;
  • Lee, Youngjin (Department of Forest Resources, Kongju National University)
  • 김성용 (공주대학교 산림자원학과) ;
  • 장미나 (공주대학교 산림자원학과) ;
  • 이병두 (국립산림과학원 산림방재연구과) ;
  • 이영진 (공주대학교 산림자원학과)
  • Received : 2014.07.16
  • Accepted : 2014.08.11
  • Published : 2015.03.31

Abstract

The objective of this study was to develop allometric equations for the estimation of crown fuel biomass of Pinus koraiensis in Korea. A total of twenty four representative sample trees were destructively sampled in Gapyeong, Hongcheon, and Jeongseon. Crown fuels were weighed separately for each fuel category by size class and by living and dead. The results of this study showed that the needles contributed the largest biomass (16.6 kg, 34.7%), followed by live branches with size ranging from 2~4 cm (9.0 kg, 18.9%), 1~2 cm (6.6 kg, 13.8%), <0.5 cm (5.1 kg, 10.6%), 0.5~1 cm (4.9 kg, 10.3%), and dead branches (3.2 kg, 6.8%), while the live branches with 4 cm (2.4 kg, 4.9%) as the lowest. The adjusted coefficient of determination values were the highest ($R^2_{adj}=0.6021{\sim}9742$) and standard error of estimate were the lowest (S.E.E.=0.2018~0.7271) in allometric equation $lnWt={\beta}_0+{\beta}_1lnD$. The available fuels that are consumed during crown fires (i.e., needles and twigs with diameter less than 1 cm) comprised 55.6% of the total crown fuel biomass.

본 연구의 목적은 우리나라 35년생 잣나무림을 대상으로 수관층 연료량을 추정하기 위한 상대생장식을 개발하고자 하였다. 경기도 가평군, 강원도 홍천군, 정선군 국유림 내 잣나무 조림지를 대상으로 총 24본의 표본목을 벌채하여 분석에 이용하였다. 수관연료량 추정을 위해 수간, 잎, 가지로 분류하여 중량을 측정하였으며, 가지는 고사여부와 직경 크기별로 세분화하여 구분하였다. 각 부위별 수관층 연료량을 보면 가장 높은 비율을 차지하는 부위는 잎(16.6 kg, 34.7%)으로 나타났으며, 2~4 cm 가지(9.0 kg, 18.9%), 1~2 cm 가지(6.6 kg, 13.8%), 0.5 cm 이하 가지(5.1 kg, 10.6%), 0.5~1 cm 가지(4.9 kg, 10.3%), 고사 가지(3.2 kg, 6.8%), 4 cm 이상 가지(2.4 kg, 4.9%) 순으로 나타났다. 대부분의 수관 부위에서 $lnWt={\beta}_0+{\beta}_1lnD$ 식이 조정결정계수가 가장 높고($R^2_{adj}=0.6021{\sim}0.9742$) 표준추정오차가 가장 낮은 것으로 나타났다(S.E.E. = 0.2018~0.7271). 한편, 수관화 확산 시 연소가능한 수관연료(잎과 직경 1 cm 이하 가지)의 비율은 총 수관에서 55.6%로 매우 높게 나타났다.

Keywords

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