삼나무의 영급별 지상부 및 지하부 바이오매스 추정
Estimation of above- and belowground biomass with consideration of age classes for Cryptomeria japonica stands
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초록
초록본 연구는 우리나라 남부지방의 대표적 조림 수종인 삼나무(Cryptomeria japonica) 임분을 대상으로 총 15본의 표본목 자료를 이용하여 영급별 줄기밀도 및 바이오매스 확장계수와 바이오매스 추정식을 분석하였다. 본 연구 결과, 영급별(20년 단위) Stand 1, 2, 3의 임목 전체 건중량은 2.93, 168.72, 402.27 kg/tree로 나타났고, 지상부 건중량은 6.35, 184.74, 251.35 ton/ha 등으로 나타났으며, 지하부를 포함한 임목 전체 건중량은 7.62, 227.77, 308.14 ton/ha로 나타났다. 줄기밀도는 5% 유의수준에서 영급 단위에 따라 0.38, 0.34, 0.34 g/cm3로 영급이 증가함에 따라 감소하였으며, 바이오매스 확장계수는 각각 3.65∼1.28, 4.07∼1.45로 감소하는 경향을 보였다. 줄기밀도는 통계적 유의성이 나타나지 않은 반면에, 바이오매스 확장계수는 통계적인 유의성이 나타났다.
Abstract
The objective of this study was to determine the stem density, biomass expansion and carbon stocks of Cryptomeria japonica species in the three stand age classes in southern part of South Korea. A total of 15 sample trees were harvested for data analysis. The results showed that the dry weight (kg/tree) of Cryptomeria japonica were 2.93 in stand 1, 168.72 in stand 2 and 402.27 in stand 3. The total aboveground biomass (ton/ha) for stand 1, 2 and 3 were 6.35, 184.74 and 251.35 while belowground biomass (ton/ha) in the three stands were 7.62, 227.77 and 308.14, respectively. It was also observed that as the stand age class increases, stem density values tended to slightly decrease and density observed ranged from 0.38 (g/cm3) to 0.34 (g/cm3). In addition, the above ground biomass expansion factors ranged from 3.65 to 1.28 and total biomass expansion factors ranged from 4.07 to 1.45 for the three stand age classes. This results showed that the above ground biomass expansion factor and total biomass expansion factor tend to decrease as the stand age increase. The influence of stand age on biomass expansion factor showed that it was statistically significant, while it was not significant on stem density
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