편백의 흉고직경-수고 생장곡선식과 초기 수고생장 모델 개발을 통한 초기 생장특성
Early Growth Characteristics of Chamaecyparis obtusa by Developing a DBH-Height Growth Curve Equation and Early Height Growth Model
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본 연구는 제5차 국가산림자원조사(2006-2010)에서 조사된 편백을 대상으로 흉고직경에 따른 수고 생장곡선식과 초기 수고생장 모델을 개발하여 편백의 초기 생장특성을 고려한 합리적인 산림경영계획 수립에 필요한 기초자료를 제공할 목적으로 실시하였다. 연구자료는 제5차 국가산림자원조사 자료 중 편백 표준목 353본에 대한 수고, 흉고직경, 연륜생장 자료를 이용하였다. 흉고직경에 따른 수고 생장곡선식은 Petterson 식, Log 식, Michailow 식을 이용하여 개발하였으며, 연령에 따른 초기 수고생장 모델은 Chapman-Richards 식, Gompertz 식, Schumacher 식을 이용하여 개발하였다. 본 연구 결과, 모델 검정을 통하여 흉고직경에 따른 수고 생장곡선식은 Petterson 식이 가장 적합한 것으로 나타났으며, 초기 수고생장 모델은 Gompertz 식이 가장 적합한 것으로 나타났다. 본 연구에서 개발한 초기 수고생장 모델을 그래프로 나타낸 결과 편백은 13년생일 때 연간 수고생장량이 0.54m로 가장 많은 것으로 나타났다. 본 연구 결과는 편백의 생장 특성 관련 연구에 활용할 수 있을 뿐 아니라 초기의 편백 조림지에 대하여 합리적인 산림경영계획 수립에 유용한 기초자료가 될 것으로 기대된다
Abstract
This study was conducted to provide basic data for rational forest management planning, considering the early (6 to 25 years old) growth characteristics of Chamaecyparis obtusa forests based on the data obtained from the 5th national forest inventory (2006-2010). The data for thie study were heights, diameters of breast height (DBH), and the tree core data for 353 standard C. obtusa collected during the inventory. DBH-Height growth curves were developed using the Petterson, Log and Michailow equations. Early height growth models were developed using the Chapman-Richards, Gompertz, and Schumacher equation. The results of this study showed that the Petterson equation was the most suitable for the DBH-Height growth curve, and the Gompertz equation was the most suitable for the early growth model. The graph of the early growth model developed in this study indicated that C. obtusa exhibits the highest annual radial growth at the age of thirteen, with a growth of 0.54 meters. As a result, this study is expected to be useful for research on the growth characteristics of C. obtusa forests and serve as basic data for the rational forest management planning of stands.
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