종가시나무의 수간곡선형 도출 및 탄소흡수량 추정
Estimation of Annual Carbon Absorption and Derivation of Stem Taper Form for Quercus Glauca
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초록
본 연구는 난대상록수종인 종가시나무에 대한 수간곡선식의 도출과 재적표의 작성 및 탄소배출계수를 이용하여 탄소저장, 흡수량을 추정하고자수행하였다. 분석에 사용된 공시목은 전남, 경남, 제주 등에서 수집된 468본이며, 수간형태를 도출하기 위하여 적용한 수간곡선 모형은 Kozak모델이다. 이 모델의 적합도는 0.9452, 편의는 0.0807, 추정치 표준오차의 백분율은 1.7145, 평균절대편차는 1.2655로 각각 나타났다. 종가시나무의개체목 재적은 Kozak 수간곡선 모델에 Smalian 재적식을 적용시켜 산출하였으며, 수고와 흉고직경급별로 재적표를 작성하였다. 그리고 붉가시나무재적표와 이번에 만든 종가시나무 재적표를 서로 비교한 결과(t-test), 통계적으로 두 집단 간에 차이가 없는 것으로 나타났다. 따라서 이들 재적표는두 수종 중 하나만 이용하거나, 둘을 하나로 통합하여도 문제가 없을 것으로 판단된다. 한편 종가시나무림의 탄소저장 및 흡수량은 산림바이오소재연구소 시험림의 조사구를 대상으로 하였다. 이들 조사구를 대상으로 탄소저장 및 흡수량을 계산한 결과, 생육상태가 양호한 시험구(A)에서 탄소저장량은 93.17 C ton/ha, 그리고 탄소흡수량은 13.14 CO2 ton/ha/yr 인 것으로 나타났다. 반면에 생육이 저조한 시험구(B)의 탄소 저장 및 흡수량은양호한 시험구보다 약 1/3 정도 낮게 나타났다.
Abstract
The purpose of this study is to derive the tree stem curve equation for Quercus glauca, a warm temperate evergreen species, toprepare the stem volume table using it and to estimate the carbon storage and absorption using the carbon emission factors. The numberof individual trees used in the analysis was 468 trees, which were collected from Jeonnam-do, Gyeongnam-do and Jeju-do. The stemtaper model applied to derive stem curve pattern was Kozak model. This model showed fitness index of 0.9452, residual bias of 0.0807,percentage of estimated standard error of 1.7145, and mean absolute deviation of 1.2655, respectively. The individual stem volume wascalculated by applying the Smalian volume equation to the Kozak taper model, and the stem volume table was prepared by each heightand diameter at breast height (DBH). As a t-test result of comparing the stem volume tables of Quercus acuta and Quercus glauca,there was no statistically significant difference between the two groups. Therefore, it is judged that there will be no problem even ifonly one of the two volume tables is used or the two tables are integrated into one. On the other hand, the carbon storage and absorptionof the Quercus glauca stand was carried out in the experimental forest of the Forest Biomaterial Research Institute, National Institute of Forest Science (NIFoS). As a result of calculating the amount of carbon storage and absorption in these experimental plots, it wasfound that the carbon storage was 93.17 C ton/ha and the carbon absorption was 13.14 CO2 ton/ha/yr in the test group (A) with goodgrowth. On the other hand, the amount of carbon storage and absorption in the poor growth plot (B) was about 1/3 lower than thatof the good growth plot (A)
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