Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Biomass and Nutrient Stocks of Tree Components by Stand Density in a Quercus glauca Plantation

종가시나무 조림지의 임분밀도에 따른 임목 바이오매스 및 양분축적량

  • Choi, Bong-Jun (Department of Forest Resources, Gyeongnam National University of Science and Technology) ;
  • Baek, Gyeongwon (Department of Forest Resources, Gyeongnam National University of Science and Technology) ;
  • Jo, Chang-Gyu (Department of Forest Resources, Gyeongnam National University of Science and Technology) ;
  • Park, Seong-Wan (Department of Forest Resources, Gyeongnam National University of Science and Technology) ;
  • Yoo, Byung Oh (Southern Forest Resources Research Center of the National Institute of Forest Science) ;
  • Jeong, Su-Young (Southern Forest Resources Research Center of the National Institute of Forest Science) ;
  • Lee, Kwang Soo (Southern Forest Resources Research Center of the National Institute of Forest Science) ;
  • Kim, Choonsig (Department of Forest Resources, Gyeongnam National University of Science and Technology)
  • 최봉준 (경남과학기술대학교 산림자원학과) ;
  • 백경원 (경남과학기술대학교 산림자원학과) ;
  • 조창규 (경남과학기술대학교 산림자원학과) ;
  • 박성완 (경남과학기술대학교 산림자원학과) ;
  • 유병오 (국립산림과학원 남부산림자원연구소) ;
  • 정수영 (국립산림과학원 남부산림자원연구소) ;
  • 이광수 (국립산림과학원 남부산림자원연구소) ;
  • 김춘식 (경남과학기술대학교 산림자원학과)
  • Received : 2016.06.29
  • Accepted : 2016.08.02
  • Published : 2016.09.30
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Abstract

This study was conducted to evaluate aboveground tree biomass and nutrient (C, N, P, K, Ca, and Mg) response of tree components by high (1,933 trees $ha^{-1}$) and low (1,200 tree $ha^{-1}$) stand densities in a 27-year-old Quercus glauca plantation. The study site was located in Goseong county, Gyeongsangnam-do, southern Korea. Total 12 trees (6 high and 6 low stand densities) were cut to develop allometric equations and to measure nutrient concentration of tree components. Stand density-specific allometric equations in the high and low stand densities were significant (P < 0.05) in tree components with diameter at breast height (DBH). Also, generalized allometric equations could be applied to estimate tree biomass regardless of the difference of stand density because of no significant effect on slope of stand density-specific allometric equations. Aboveground tree biomass estimated by the allometric equations was significantly higher in the high stand density (177 Mg $ha^{-1}$) than in the low stand density (114 Mg $ha^{-1}$). However, nutrient concentration of tree components was not significantly affected by the difference of stand density. Nutrient stocks in tree components were not significantly between the high stand density and the low stand density, except for the N and P stocks of stem wood. These results indicate that aboveground tree biomass could be significantly affected by stand density, but nutrient concentration among the tree components was not affected by the difference of stand density in a Quercus glauca plantation.

본 연구는 경상남도 고성군에 식재된 상록활엽수인 27년생 종가시나무 조림지를 대상으로 고밀도(1,933본/ha)와 저밀도(1,200본/ha)구분한 후 총12본(고밀도 임분 6본, 저밀도 임분 6본)의 표본목을 벌채하고 임목부위별 바이오 매스 추정을 위한 상대생장식과 양분(C, N, P, K, Ca, Mg)축적량을 조사하였다. 흉고직경(DBH)을 독립변수로 하는 임분밀도별 줄기 목질부, 줄기 수피, 가지, 잎, 지상부 총량 등의 바이오매스 추정을 위한 상대생장식의 유의성이 인정되었으며(P < 0.05), 상대생장계수(slope)는 유의적인 차이가 없어 일괄상대생장식의 적용이 가능한 것으로 나타났다. 종가시나무 조림지의 지상부 임목 바이오매스는 고밀도 임분이 177 Mg $ha^{-1}$로, 저밀도 임분 114 Mg $ha^{-1}$에 비해 유의적으로 높았다. 그러나 줄기 목질부, 줄기 수피, 가지, 잎 등의 임목부위별 양분 농도의 경우 임분밀도 따른 유의적인 차이는 없었다(P > 0.05). 임목부위별 양분축적량은 줄기 목질부의 질소 및 인축적량을 제외하고 고밀도 임분과 저밀도 임분 사이에 유의적인 차이는 없었다. 본 연구결과에 따르면 종가시나무 조림지의 임목부위별 양분농도의 경우 바이오매스 축적량에 비해 임분밀도의 영향이 크지 않는 것으로 나타났다.

Keywords

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