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http://dx.doi.org/10.14578/jkfs.2020.109.4.477

Development of Stand Yield Table Based on Current Growth Characteristics of Chamaecyparis obtusa Stands  

Jung, Su Young (Warm Temperate and Subtropical Forest Research Center, National Institute of Forest Science)
Lee, Kwang Soo (Warm Temperate and Subtropical Forest Research Center, National Institute of Forest Science)
Lee, Ho Sang (Warm Temperate and Subtropical Forest Research Center, National Institute of Forest Science)
Ji Bae, Eun (Forest Biomaterials Research Center, National Institute of Forest Science)
Park, Jun Hyung (Forest Technology and Management Research Center, National Institute of Forest Science)
Ko, Chi-Ung (Division of Forest Industry Research, National Institute of Forest Science)
Publication Information
Journal of Korean Society of Forest Science / v.109, no.4, 2020 , pp. 477-483 More about this Journal
Abstract
We constructed a stand yield table for Chamaecyparis obtusa based on data from an actual forest. The previous stand yield table had a number of disadvantages because it was based on actual forest information. In the present study we used data from more than 200 sampling plots in a stand of Chamaecyparis obtusa. The analysis included theestimation, recovery and prediction of the distribution of values for diameter at breast height (DBH), and the result is a valuable process for the preparation ofstand yield tables. The DBH distribution model uses a Weibull function, and the site index (base age: 30 years), the standard for assessing forest productivity, was derived using the Chapman-Richards formula. Several estimation formulas for the preparation of the stand yield table were considered for the fitness index, and the optimal formula was chosen. The analysis shows that the site index is in the range of 10 to 18 in the Chamaecyparis obtusa stand. The estimated stand volume of each sample plot was found to have an accuracy of 62%. According to the residuals analysis, the stands showed even distribution around zero, which indicates that the results are useful in the field. Comparing the table constructed in this study to the existing stand yield table, we found that our table yielded comparatively higher values for growth. This is probably because the existing analysis data used a small amount of research data that did not properly reflect. We hope that the stand yield table of Chamaecyparis obtusa, a representative species of southern regions, will be widely used for forest management. As these forests stabilize and growth progresses, we plan to construct an additional yield table applicable to the production of developed stands.
Keywords
Chamaecyparis obtusa; estimation formula; real forest; stand yield table; site index;
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