남부지방 해송의 수간곡선 추정식 개발
Development of Stem Profile Equation for Pinus thunbergii in Southern Region
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초록
본 연구의 목적은 6개의 수간곡선을 비교하여 우리나라 남부지역 해송에 적합한 수간곡선식을 개발하는데 있다. 59본의 입목을 벌채하여 1년 단위 수간석해를 통해 자료의 전체 수고, 단면고별 수피 외 직경, 단면고별 수피 내 직경, 임령을 측정하였다. 수간곡선식의 적합도는 적합도 지수(fit index, FI), 편차(bias), 평균오차제곱근(root mean square error, RMSE)을 이용하였다. 남부 지방 해송의 수간곡선 추정을 위하여 6종의 수간곡선식을 비교한 결과, Kozak(1988) 식에서 높은 적합도를 보였으며 FI, Bias, RMSE는 각각 0.9802, 0.0284, 1.2165로 나타났다. 본 연구의 주요한 결과로 추정된 수간곡선식은 남부지방의 주요 수종인 해송의 생장 정보 제공이 가능한 것으로 판단된다.
Abstract
This study was conducted to develop stem taper models for Pinus thunbergii in southern region, compare six taper models. Collected data to 59 fallen trees measures the height, diameter outside bark at section height, diameter inside bark at section height, and age using stem analysis. The fit index, bias, and root mean square error were used to evaluate the precision of six taper models. the main results showed that the Kozak(1988) taper model provided the best fit index, bias, and root mean square error with 0.9802, 0.0284, and 1.2165, respectively. These stem taper models can help forest managers in predicting the information for growth of the standing trees of Pinus thunbergii in southern region.
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