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http://dx.doi.org/10.14578/jkfs.2021.110.4.648

Growth Curve Estimation of Stand Volume by Major Species and Forest Type on Actual Forest in Korea  

Yoon, Jun-Hyuck (Forest Biomaterial Research Center, National Institute of Forest Science)
Bae, Eun-Ji (Forest Biomaterial Research Center, National Institute of Forest Science)
Son, Yeong-Mo (Forest Biomaterial Research Center, National Institute of Forest Science)
Publication Information
Journal of Korean Society of Forest Science / v.110, no.4, 2021 , pp. 648-657 More about this Journal
Abstract
This study was conducted to estimate the volume growth by forest type and major species using the national forest resource inventory and to predict the final age of maturity by deriving the mean annual increment (MAI) and the current annual increment (CAI). We estimated the volume growth using the Chapman-Richards model. In the volume estimation equations by forest type, coniferous forests exhibited the highest growth. According to the estimation formula for each major species, Larix kaempferi will grow the highest among coniferous tree species and Quercus mongolica among broad-leaved tree species. And these estimation formulas showed that the fitness index was generally low, such as 0.32 for L. kaempferi and 0.21 for Quercus variabilis. In the analysis of residual amount, which indicates the applicability of the volume estimation formula, the estimates of the estimation formula tended to be underestimated in about 30 years or more, but most of the residuals were evenly distributed around zero. Therefore, these estimation formulas have no difficulty estimating the volume of actual forest species in Korea. The maximum age attained by calculating MAI was 34 years for P. densiflora, 35 years for L. kaempferi, and 31 years for P. rigida among coniferous tree species. In broad-leaved tree species, we discovered that the maximum age was 32 years for Q. variabilis, 30 years for Q. acutissima, and 29 years for Q. mongolica. We calculated MAI and CAI to detect the point at which these two curves intersected. This point was defined by the maximum volume harvesting age. These results revealed no significant difference between the current standard cutting age in public and private forests recommended by the Korea Forest Service, supporting the reliability of forestry policy data.
Keywords
chapman-richards model; national forest resources inventory; maximum volume harvesting age; mean annual increment; volume estimation formula;
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