Journal of Forest and Environmental Science

Institute of Forest Science, kangwon National University (강원대학교 산림과학연구소)
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Nonlinear Height-DBH Growth Models for Larix kaempferi in Gangwon and North Gyeongsang Province

  • Lee, Daesung (Department of Forest Management, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Choi, Jungkee (Department of Forest Management, College of Forest and Environmental Sciences, Kangwon National University) ;
  • Seo, Yeongwan (Institute of Forest Science, Kangwon National University) ;
  • Kim, Euigyeong (Department of Forest Environmental Resources, College of Agriculture and Life Science, Gyeongsang National University)
  • Received : 2014.05.06
  • Accepted : 2014.05.11
  • Published : 2014.05.31
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Abstract

This study was conducted to estimate the best-fit nonlinear height-DBH growth models for Larix kaempferi in Gangwon and North Gyeongsang province in South Korea. Exponential, Modified Logistic, Chapman-Richards, and Weibull function were used for estimating height-DBH models. To evaluate the selected models, $R^2$, RMSE, MD, MAD, and residual plots were performed in each model. Also, the coefficients and patterns in models of the previous studies were compared with those in this study. The result showed that Weibull equation was found to be the best-fit model with $R^2$=0.9837, RMSE=2.6133, MD=0.0089, and MAD=2.0896. All model parameters in our study had similar values to those in the previous models except for asymptotic parameter a. Our research result showed that Gangwon and North Gyeongsang province were superior to other provinces with regard to height growth for Larix kaempferi.

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