A Study on Estimation of Biomass, Stem Density and Biomass Expansion Factor for Stand Age Classes of Japanese Larch (Larix leptolepis) Stands in Gapyeong Area

가평지역 낙엽송림의 바이오매스와 영급별 줄기 밀도 및 바이오매스 확장계수 추정 연구

  • Noh, Nam-Jin (Division of Environmental and Ecological Engineering, Korea University) ;
  • Son, Yo-Whan (Division of Environmental and Ecological Engineering, Korea University) ;
  • Kim, Jong-Sung (Institute of Life Science and Natural Resources, Korea University) ;
  • Kim, Rae-Hyun (Korea Forest Research Institute) ;
  • Seo, Keum-Young (Division of Environmental and Ecological Engineering, Korea University) ;
  • Seo, Kyung-Won (Division of Environmental and Ecological Engineering, Korea University) ;
  • Koo, Jin-Woo (Division of Environmental and Ecological Engineering, Korea University) ;
  • Kyung, Ji-Hyun (Division of Environmental and Ecological Engineering, Korea University) ;
  • Park, In-Hyeop (Dept. of Forest Resources, Sunchon National University) ;
  • Lee, Young-Jin (Dept. of Forest Resources, Gongju National University) ;
  • Son, Yeong-Mo (Korea Forest Research Institute) ;
  • Lee, Kyeong-Hak (Korea Forest Research Institute)
  • Published : 2006.06.30

Abstract

This study was conducted to develope allometric equations and to estimate biomass, stem density, and biomass expansion factor for the three stand age classes (I-II, III-IV, and V-VI) of Japanese larch (Larix leptolepis) in Gapyeong area. Total dry weight (kg/tree) and aboveground biomass (ton/ha) were 57.8 and 71.1 for I-II class, 185.4 and 195.6 for III-IV class, and 1047.9 and 180.6 for V-VI class, respectively. Total above and belowground biomass (ton/ha) was 96.3 for I-II class, 265.7 for III-IV class, and 244.5 for V-VI class. The proportion (%) of stem to total biomass increased with stand age class and was 53.9 for I-II class, 55.7 for III-IV class, and 57.7 for V-VI class, respectively, while that of foliage decreased and was 7.1 for I-II class, 4.5 for III-IV class, 2.3 for V-VI class. Ratios of root to aboveground biomass were 0.35 for all age classes. Stem density ($g/cm^3$) differed between I-II class and III-VI class. Aboveground and total biomass expansion factors were 1.31-1.44 and 1.26-1.94. Our results showed that differences in stand density with stand age classes might influence allometric equation, stem density and ratios of aboveground biomass to stem biomass and total biomass to stem biomass (biomass expansion factors).