Journal of Korean Society of Forest Science (한국산림과학회지)

Korean Society of Forest Science (한국산림과학회)
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Assessment and Prediction of Stand Yield in Cryptomeria japonica Stands

삼나무 임분수확량 평가 및 예측

  • Son, Yeong Mo (Div. of Forest Industry Research, Korea Forest Research Institute) ;
  • Kang, Jin Taek (Div. of Forest Industry Research, Korea Forest Research Institute) ;
  • Hwang, Jeong Sun (Div. of Forest Industry Research, Korea Forest Research Institute) ;
  • Park, Hyun (Div. of Forest Industry Research, Korea Forest Research Institute) ;
  • Lee, Kang Su (Southern Forest Resource Research Center, Korea Forest Research Institute)
  • 손영모 (국립산림과학원 산림산업연구과) ;
  • 강진택 (국립산림과학원 산림산업연구과) ;
  • 황정순 (국립산림과학원 산림산업연구과) ;
  • 박현 (국립산림과학원 산림산업연구과) ;
  • 이광수 (국립산림과학원 남부산림자원연구소)
  • Received : 2015.01.12
  • Accepted : 2015.09.10
  • Published : 2015.09.30
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Abstract

The objective of this paper is to look into the growth of Cryptomeria japonica stand in South Korea along with the evaluation on their yields, followed by their carbon stocks and removals. A total of 106 sample plots were selected from Jeonnam, Gyeongnam, and Jeju, where the groups of standard are grown. We only used 92 plots data except outlier. As part of the analysis, the Weibull diameter distribution was applied. In order to estimate the diameter distribution, the growth estimation equation for each of the growth factors including the height, the diameter at breast height, and the basal area was drafted out and the verification for each equation was examined. The site index for figuring out the forest productivity of Cryptomeria japonica stand for each district was also developed as a Schumacher model and 30yr was used as a reference age for the estimation of the site index. It was found that the site index for Cryptomeria japonica stand in South Korea ranges from 10 to 16 and this result was used as a standard for developing the stand yield table. According to the site 14 in the stand yield table, the mean annual increment (MAI) of the Cryptomeria japonica reaches $7.6m^3/ha$ on its 25yr and its growing stock is estimated to be at $190.1m^3/ha$. This volume is about $20m^3$ as high as that of the Chamaesyparis obtusa. Furthermore, the annual carbon absorptions for a Cryptomeria japonica stand reached the peak at 25yr, which is 2.14 tC/ha/yr, $7.83tCO_2/ha/yr$. When compared to the other conifers, this rate is slightly higher than that of a Chamaecyparis obtusa ($7.5tCO_2/ha/yr$) but lower than that of the Pinus koraiensis ($10.4tCO_2/ha/yr$) and Larix kaempferi ($11.2tCO_2/ha/yr$). With such research result as a base, it is necessary to come up with the ways to enhance the utilization of Cryptomeria japonica as timbers, besides making use of their growth data.

본 연구는 우리나라 삼나무의 생장 및 수확량 평가와 탄소저장 및 흡수량을 알아보기 위하여 수행되었다. 조사구는 전남, 경남 및 제주지역에 정상적으로 생육하는 삼나무 집단지에서 총 106개 표준지를 선정(이상치를 제외한 92개소 이용)하였다. 그리고 분석을 위하여 Weibull 직경분포 모델을 적용시켰다. 직경분포 추정을 위하여 흉고직경, 흉고단면적, 수고 등 생장인자별 생장 추정식을 도출하고, 이들에 대한 적합성을 검증하였다. 그리고 삼나무에 대한 지역별 임지생산력을 파악할 수 있는 지위지수를 Schumacher 모델로서 개발하였으며, 지위지수 추정의 기준임령은 30년으로 정하였다. 우리나라 삼나무의 지위지수 범위는 10~16에 있는 것으로 나타났으며, 이를 기준으로 임분수확표를 조제하였다. 임분수확표 지위 14에 의하면, 25년생일 때 연평균생장량(MAI)이 $7.6m^3/ha$인 것으로 나타나며, 임목축적 $190.1m^3/ha$이 될 것으로 예측되었다. 이는 편백보다 $20m^3$ 정도 높은 값이었다. 그리고 삼나무의 연간 탄소흡수량은 임령 25년에 2.14 tC/ha/yr, $7.83tCO_2/ha/yr$으로 최대값을 갖는 것으로 나타났다. 이를 타 침엽수와 비교해 보면, 편백($7.5tCO_2/ha/yr$)보다는 약간 높은 수준이나, 잣나무 $10.4tCO_2/ha/yr$, 낙엽송 $11.2tCO_2/ha/yr$ 보다는 낮은 수치였다. 이러한 연구결과를 기반으로 삼나무의 생장 정보 활용 뿐만아니라 목재로서의 이용을 제고할 수 있는 방안 마련이 필요하다고 사료된다.

Keywords

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