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http://dx.doi.org/10.14578/jkfs.2015.104.3.411

The Necessity and Method of Stand Density Control Considering the Shape Ratio of Pinus thunbergii Coastal Disaster Prevention Forests in South Korea  

Kim, Suk-Woo (Division of Forest Science, Kangwon National University)
Chun, Kun-Woo (Division of Forest Science, Kangwon National University)
Park, Ki-Hyung (Department of Forest Conservation, Korea Forest Research Institute)
Lim, Young-Hyup (Division of Forest Science, Kangwon National University)
Yun, Ju-Ung (Department of Forestry and Environmental Systems, Kangwon National University)
Kwon, Se-Myoung (School of Soil and Water Conservation, Beijing Forestry University)
Youn, Ho-Joong (Department of Forest Conservation, Korea Forest Research Institute)
Lee, Jin-Ho (Gangwon Branch of Korean Association of Soil and Water Conservation)
Teramoto, Yukiyoshi (Faculty of Agriculture, Kagoshima University)
Ezaki, Tsugio (Faculty of Agriculture, Ehime University)
Publication Information
Journal of Korean Society of Forest Science / v.104, no.3, 2015 , pp. 411-420 More about this Journal
Abstract
This study examined methods for stand density control by using shape ratio (tree height/DBH) and its application for effective management of Pinus thunbergii coastal disaster prevention forests. We analyzed the present conditions (height, DBH, and density) of P. thunbergii coastal disaster prevention forests at 123 study sites on Jeju Island and west, south, and east coasts of South Korea and compared them with results from previous studies. The average shape ratio for P. thunbergii showed positive correlations with stand density and was significantly higher on the west coast (66.32) than on the south (49.57) and east (48.19) coasts and Jeju Island (48.29). Stands with shape ratio higher than 70 accounted for 50% of the total study sites on the west coast, indicating a decrease in their disaster prevention function compared to that of other previous studies. The stand density in most coastal areas, except the east coast, was significantly higher than the standards recommended by the Korea Forest Service and the Forestry and Forest Products Research Institute of Japan, indicating the need for stand density control. According to the growth estimation equation for P. thunbergii in the coastal area of South Korea, density control is required for young stands less than 14 years old, which show drastic increase in the shape ratio, to conserve their disaster prevention function. Particularly, the first thinning of P. thunbergii forests should be implemented before the stand age of 8 years that a shape ratio exceeds 70. For disaster-prone young stands (${\leq}20cm$ DBH) of P. thunbergii, the stand density was higher in the standard of Japan considering shape ratio than in that of Korea aiming timber production. Hence, the standard guidelines employed in Japan, which assign higher importance to disaster prevention function based on field surveys, can be applied effectively for controlling the stand density of P. thunbergii coastal forests in South Korea, to improve their disaster prevention function.
Keywords
stand density control; shape ratio; Pinus thunbergii; coastal disaster prevention forests;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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