곰솔림의 생장특성을 반영한 지위지수 추정및 해안⋅내륙 임분 비교
Comparison of Site Index by Growth Characteristics of Coastal and Inland Pinus thunbergii Parl. Stands
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초록
본 연구는 우리나라 곰솔 현실림의 생장특성을 반영한 지위지수곡선을 개발하고자 최근 산림자원조사를 통해 획득한 493 plots의 곰솔 임분자료를 수집하여 진행되었다. 수고생장모델 개발을 위해 생장추정에 널리 쓰이고 있는 Chapman-Richards, Schumacher, Gompertz 및 Weibull대수차분방정식을 적용한 결과, 적합도가 가장 높은 Weibull식을 수고 생장모델에 대한 최적합식으로 선정하였으며, 유도곡선법을 이용하여 지위지수곡선을 개발하였다. 개발된 해안⋅내륙 각각의 곰솔 지위지수 분류곡선을 이용하여 임령에 따른 독립된 두 집단의 우세목 수고생장을 비교 분석한결과, 임령 50년 이후에서 유의적 차이가 있는 것으로 나타났다(p<0.05). 따라서 본 연구는 변화된 곰솔 현실림의 생장특성을 반영한 지위지수를통해 지역 간 생장특성 차이를 구명함으로써 지역별 맞춤형 임분관리계획 수립 시 활용가치가 더욱 기대되는 바이다.
Abstract
This study was conducted by collecting 493 plots to develop site index curve that reflects the stand growth characteristics for Pinusthunbergii Parl. As a result of applying the Chapman-Richards, Schumacher, Gompertz, and Weibull algebraic differential equations,which are widely used for estimation of growth, Weibull equation was selected as the best fit equation for the height growth model,and a site index curve was developed using the derived curve method procedure. As a result of the independent samples T-test betweenthe two coastal and inland groups in order to comparatively analyze the growth characteristics between two groups of the P. thunbergiiParl. stands using the developed site index, there was a significant difference in site index between the two groups after 50 years ofage. indicating that the p-value was less than 0.05. Therefore, this study is expected to be used as improved data for establishing acustomized stand management plan by examining regional differences in growth through site indicators reflecting the recent growthcharacteristics of black pine forests.
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