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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Forest Society
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Journal DOI :
Korean Forest Society
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Volume & Issues
Volume 99, Issue 6 - Dec 2010
Volume 99, Issue 5 - Oct 2010
Volume 99, Issue 4 - Aug 2010
Volume 99, Issue 3 - Jun 2010
Volume 99, Issue 2 - Apr 2010
Volume 99, Issue 1 - Mar 2010
Selecting the target year
Economical Optimum Forest Road Density with five Cost Variable
Park, Soo-Kyoo ; Kang, Gun-Uh ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 1~8
The optimum forest road density was calculated with the method which is used in Europe on the investigation site in Korea. The economical optimum forest road density at the minimum total transport cost was 10.51 m/ha. The total transport cost was calculated 235,354 won/ha per year. The forest road construction cost amounted to 99,693 won/ha per year in case of the depreciation period of 30 years and the interest rate of 3%, the forest road maintenance cost amounted to 14,502 won/ha per year, the logging cost amounted to 99,564 won/ha per year, the cost of footpaths amounted to 18,142 won/ha per year, the cost by the loss of the production area amounted to 3,454 won/ha per year.
Stand Yield Table and Commercial Timber Volume of Eucalyptus Pellita and Acacia Mangium Plantations in Indonesia
Son, Yeong-Mo ; Kim, Hoon ; Lee, Ho-Young ; Kim, Cheol-Min ; Kim, Cheol-Sang ; Kim, Jae-Weon ; Joo, Rin-Won ; Lee, Kyeong-Hak ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 9~15
This study was conducted to develop a stand growth model and a stand yield table for Eucalyptus pellita and Acacia mangium plantations in Kalimantan, Indonesia. To develop a stand growth model, Weibull robability density function, a diameter class model, was applied in this study. In the development of stand growth model by site index and stand age, a hierarchy is generally required - estimation, recovery and prediction of the diameter class model. A number of grow equations were also involved in each process to estimate diameter, height, basal area, minimum or maximum diameter. To examine whether the grow equations are adequate for Eucalyptus pellita or Acacia mangium plantations, a fitness index was analyzed for each equation. The results showed that fitness indices were ranged from 65 to 89% for Eucalyptus pellita plantations and from 72 to 95% for Acacia mangium plantations. As being highly adequate for the plantations, a stand yield table was developed based on the resulted growth model, and applied to estimate the stand growth with midium site index for 10-year period. The highest annual stand growth of Eucalyptus pellita plantations was estimated to be 21.25
/ha, while that of Acacia mangium plantations was 27.5
/ha. In terms of annual stand growth, Acacia mangium plantations appeared to be more beneficial than Eucalyptus pellita plantations. Also, to estimate commercial timber volume available from the plantations, an assumption that a log would be cut by 2.7 m in length and the rest of the log would be cut by 1.5m was involved. The commercial timber volume available from Eucalyptus pellita plantations was 68.0
/ha, 33% from the total stand volume, 203.2
/ha. Also 96.7
/ha of commercial timbers were available from Acacia mangium plantations, which was 42% from the 232.9
/ha in total. Presenting a good information about the stand growth in Eucalyptus pellita and Acacia mangium plantations, this study might be useful for whom proceeds or considers an abroad plantation for merchantable timber production or carbon credit in tropical regions.
Enhancement of Immuno Modulatory Activities of Acer mono Bark from Low Temperature High Pressure Extraction Process
Jeong, Myoung-Hoon ; Oh, Sung-Ho ; Kim, Seung-Seop ; Kwon, Min-Chul ; Choi, Woon-Yong ; Seo, Yong-Chang ; Lee, Hak-Ju ; Kang, Ha-Young ; Lee, Hyeon-Yong ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 16~23
Experiments were performed for investigate the immune activities on human B and T cell growth and secretion of their cytokines. Also, antibodies in serum were investigated in female ICR mouse by feeding the extracts of Acer mono at dose of 30 and 100 mg/mL of one day orally for 15 days. The cytotoxicity of the samples on normal human cell (HEL299) was below 24.15% in adding the all extracts. Both human immune B and T cells were increased up to about 40% by the high pressure extraction process. The secretion of cytokines (IL-6, TNF-
) on human B and T cells were increased up to 20-50% by adding the high pressure extraction process compare to the hot water extraction process. Also, total serum IgG levels increased by feeding Acer mono extacts. It can be conclude that optimum condition for efficient extraction of Acer mono as functional materials is solvent extraction process using water with high pressure at below
than typical process.
Development of Criteria and Indicators for Forest Management Certification in Korea
Shin, Hye-Jin ; Kim, Eui-Gyeong ; Yoo, Byoung-Il ; Seo, Jeong-Won ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 24~35
This paper aims to contribute to the introduction of forest certification (a private enterprise) in Korea by developing C&I with consideration of the Korean forestry situation. For this study, 6 attributes for establishing certification system at FMU level was applied. To weigh relative importance of international organization's assortment and indicators, AHP survey was conducted to each experts in political, ecological, social, and economic field. By the experts attending FSC's auditing process, indicators adopted through AHP survey were inspected again for the realistic application in the fields. In this process, the typical environment of Korean forestry in real aspect and problems in FSC system were reaffirmed. Therefore, 7 criteria, 27 indicators and 92 checklists were finally developed for the construction of forest certification based on the results of AHP surveys and from investigation on the realistic situation in the fields.
A Study on the Factors Determining Visits of Seoul Metropolitan Citizens to Forests: Focusing on the Visitors of Mt. Bukhan, Mt. Gwanak, Mt. Surak, and Mt. Dobong
Park, Jeong-Yeol ; Kim, Tae-Hee ; Kim, Sung-Yoon ; Park, Dong-Gyun ; Lee, Hee-Chan ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 36~46
The purpose of this research was to derive political suggestion to increase the demand for forest visit by analyzing the demand of forest visitors, focusing on the residents of Seoul and capital areas. The determinants of demand, which is the number of forest visit in a year, were analyzed by independent variables; six factors from factor analysis on selective attributes, demographic characteristics, and other variables related with the general matters when visiting a forest. As a result, among the independent variables, selective attribute (tourism resource factor), gender (male), and residency (Seoul) were found out to have positive(+) effect on demand for forest visit. However, other selective attribute (external factor of forestry), occupation (white-collar employee), and level of education (over college graduate) were found out to have negative(-) effect on demand for forest visit. Based on these results, implications for the expansion of demand for forest visits were derived.
Effects of Acute forest Walking Exercise on Blood Glucose of IGT, NIDDM in the Elderly
Choi, Jong-Hwan ; Shin, Won-Sop ; Rho, Ki-Taek ; Yeon, Poung-Sik ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 47~51
The purpose of this study was to analyze the effect of acute forest walking exercise on blood glucose of IGT (impaired glucose tolerance), NIDDM (non-insulin dependent diabetes mellitus) in the elderly. There were four groups (n=60): forest walking exercise with IGT group (n=15;
yrs), forest walking exercise with NIDDM group (n=15;
yrs), field walking exercise with IGT group (n=15;
yrs), field walking exercise with NIDDM group (n=15;
yrs). They were tested on blood glucose levels at the beginning and at the end of each walking exercise. While the forest walking groups (interval + resistance exercise) worked for 40minutes with HRmax 50~60% level, the field walking groups (only aerobic exercise) worked for 40 minutes with HRmax 50~60% level. For data analysis, mean and standard deviation scores were calculated, and paired t-test and ANCOVA test were used. This study resulted in as follows. First, both walking groups showed the significant decrease of blood glucose in impaired glucose tolerance (IGT) after completing each exercise. Second, while the forest walking group showed the significant decrease of blood glucose in insulin dependent diabetes mellitus (NIDDM) after completing the forest exercise, the field walking group did not present any decrease of blood glucose in NIDDM after the field walking exercise. Therefore, the present findings suggest that the forest walking exercise as an interval and resistance exercise may be more effective to decrease blood glucose for IGT and NIDDM peoples in comparison to the field walking exercise as an aerobic exercise.
Crown Fuel Characteristics of Japanese Red Pine (Pinus densiflora) in Mt. Palgong, Daegu
Koo, Kyo-Sang ; Lee, Byung-Doo ; Won, Myoung-Soo ; Lee, Myung-Bo ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 52~56
Crown fuel characteristics such as crown bulk density, crown base height, and fuel moisture content of Japanese red pine were analyzed. Ten trees in Mt. Palgong at Daegu, were destructively sampled and their crown fuels were weighed separately for each fuel category. Fuel content of live and dead crown component were 53%, and 15.3%, respectively. Foliar moisture content was 56%. Needles and twigs with diameter less than 1cm diameter accounted for 16.2%, 55% of total and crown fuel load. Average crown bulk density of Japanese red pine was 0.24 kg/
, effective crown fuel bulk density was 0.1325 kg/
Development of Stem Profile and Taper Equation for Quercus acuta in Jeju Experiment Forests
Chung, Young-Gyo ; Kim, Dae-Hyun ; Kim, Cheol-Min ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 57~61
Data with collected from 278 trees sampled through out the climatic range of Quercus acuta in Jeju Experiment Forests. The models tested to select the best-fit equations form the Max & Burkhart's model, Kozak's model, and Lee's model. Performance of the equations in predicting of residuals on predicted values. In result, all three models gave slightly better values of fit statistics. In plotting residuals against predicted diameter, Max & Burkhart's model showed underestimation in predicting small diameter and Lee's Model did the same in predicting small diameter. Based on the above analysis of three models in predicting stem taper, Kozak's model was chosen for the best-fit stem taper equations, and its parameter estimates was given for Quercus acuta. Kozak's model was used to develop a stem volume table outside bark for Quercus acuta.
Aboveground Biomass Estimation of Pinus densiflora Stands in the Western Gyeongnam Regions
Jeong, Jae-Yeob ; Cho, Hyun-Jong ; Seo, Jeong-Hyun ; Kim, Rae-Hyun ; Son, Young-Mo ; Lee, Kyeong-Hak ; Kim, Choon-Sig ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 62~67
This study was carried out to develop local allometric biomass regression equations and to estimate aboveground biomass of red pine (Pinus densiflora S. et Z.) stands among three regions (Hadong, Hamyang, Sancheong) from the western regions of Gyeongnam province. We selected three natural red pine stands with similar stand ages (about 40-year-old) from each region. The allometric regression equations were significant in all tree components (P<0.05) and the determination of coefficient (
) ranged 0.87 from 0.99. There was a significant difference (P<0.05) in the biomass of tree components among three regions. The biomass was 173.3 Mg/ha in Hadong, 131.0 Mg/ha in Sancheong, and 66.5 Mg/ha in Hamyang. The proportion of biomass was 70.4-77.1% in stemwood, 10.9-15.2% in branch, 8.9-10.4% in stembark, and 3.1-4.4% in needle. The results indicated that red pine stands in the western Gyeongnam regions showed the significant difference of aboveground biomass which was attributed to site quality and stand density.
Analysis Growth Performance and Ascorbic Acid Contents of Allium victorialis var. platyphyllum, Ligularia fischeri, and L. stenocephala Under Changing Light Intensity
Kim, Gil-Nam ; Cho, Min-Seok ; Kwon, Ki-Won ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 68~74
The present study was conducted to investigate growth performance and ascorbic acid contents of Allium victorialis var. platyphyllum, Ligularia fischeri, and L. stenocephala growing under four different light intensity regimes (full sun, and 64~73%, 35~42%, 9~16% of full sun). The leaf area and total biomass of Allium victorialis var. platyphyllum were highest in 35~42% of the full sun. However, the leaf area and total biomass were highest in 64~73% of the full sun in Ligularia fischeri, and L. stenocephala. The leaf thickness decreased with increasing shading in all three wild vegetables. The growth of root comparing to that of shoot decreased as shading increased, and as the result, the ratio of shoot biomass to root biomass increased. Ascorbic acid contents were higher in Allium victorialis var. platyphyllum than in Ligularia fischeri and L. stenocephala. Allium victorialis var. platyphyllum showed the highest contents of ascorbic acid in 35~42% of full sun. Whereas Ligularia fischeri and L. stenocephala showed the highest in 64~73% of full sun.
Study on Policies and Actions Associated with Promotion of Social and Environmental Benefits of Forest
Choi, Soo-Im ; Joo, Rin-Won ; Kim, Ki-Dong ; Kim, Jae-Sung ; Jeon, Hyon-Sun ; Kim, Jae-Jun ; Park, Dong-Kyun ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 75~84
For policies and actions associated promotion of social and environmental benefits of forest in Korea, various polices have been progressed based on newly established ordinances along with full progresses of subdivision of the Forest Law since reorganization of regulatory system by functions focused on the Basic Forestry Act. In these policies, water resource conserving function and national land conserving function which have little close relation to the people's daily life including formation of forest for conservation of water supply and erosion control have continued to be promoted since 1970s. Especially in recently years, the policy of biodiversity conserving function according to importance of health and recreation function and conservation management of forest ecosystem and animal and plant are being promoted actively. Among them, the health and recreation functions is featured for various policies to be promoted in spite of small budget for responding actively to various forest recreation demands after settlement of 5-day workweek system. It seems because the health and recreation function could obtain visible results of governmental investment and high responses from the peoples as a function having close relationship with the people's daily life.
Growth and Tissue Nutrient Responses of Fraxinus rhynchophylla, Fraxinus mandshurica, Pinus koraiensis, and Abies holophylla Seedlings Fertilized with Nitrogen, Phosphorus, and Potassium at a Nursery Culture
Park, Byung-Bae ; Byun, Jae-Kyung ; Kim, Woo-Sung ; Sung, Joo-Han ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 85~95
The purpose of this study was to quantitatively measure both growth performances and nutrient responses of Fraxinus rhynchophylla, Fraxinus mandshurica, Pinus koraiensis, and Abies holophylla seedlings, which are commercially planted in Korea, to nitrogen, phosphorus, and potassium fertilization. We used Dickson's quality index (QI) to compare growth performances and vector diagnosis to interpret nutrient status. Nitrogen fertilization increased more height and root collar diameter growth in F. rhynchophylla and F. mandshurica relative to no fertilization treatment. The QI of F. rhynchophylla and F. mandshurica was the highest on N treatment, but there were no significant differences between treatments for P. koraiensis and A. holophylla. Nitrogen fertilization increased total dry weight by 43, 41, 26, -9% for F. rhynchophylla, F. mandshurica, P. koraiensis and A. holophylla, respectively. In F. rhynchophylla, N fertilization increased N contents with similar N concentrations ("sufficiency"), decreased both P concentrations and P contents ("antagonism"), and decreased K contents with similar K concentrations ("toxic accumulation"). In P. koraiensis, N fertilization decreased N, P, and K concentrations because of more dry weight increases compared to uptaken contents ("dilution"), but N fertilization decreased N, P, and K contents with similar N, P, and K concentrations ("toxic accumulation"). In the light of quality index and vector diagnosis, F. rhynchophylla and F. mandshurica seedlings treated with N fertilization would have high field performance.
Combustion Characteristics of the Quercus variabilis and Zelkova Serrata Dried at Room Temperature
Chung, Yeong-Jin ; Kwon, In-Kyu ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 96~101
One of the restriction of wood as building material is its combustibility. The purpose of this paper is to examine the combustion properties of the quercus variabilis and zelkova serrata which are dried at room temperature and meet the desirable characteristics for use of construction materials. The cone calorimeter (ISO 5660-1) was used to determine the heat release rate (HRR) and fire smoke index, as well as CO production and smoke obscuration. The
of the quercus variabilis at 50 kW/
was high in comparison with
for the zelkova serrata. Furthermore, the quercus variabilis has high specific extinction area (
/kg compared with
/kg of zelkova serrata. Thease results are depend on the density of tested wood species. In addition, the quercus variabilis has high CO production rate compared with that of zelkova serrata. Also, zelkova serrata showed an increase of retardant properties attributed to char formation compared with that of quercus variabilis.
Inhibitory Effect of Rhus Verniciflua Extract on Lipid Peroxidation and Inflammatory Cytokines during Endurance Exercise Training
Lee, Youn-Kyung ; Kwon, Oh-Seon ; Song, Young-Ju ; Kim, Sea-Hyun ; Kim, Pan-Gi ; Ryu, Sung-Pil ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 102~110
This study was performed to find out the inhibitory effect of Rhus Verniciflua extract on lipid peroxidation and inflammatory cytokines during endurance exercise training for 8 weeks in rats. For this study, Sprague-Dawley rats were divided into 4 groups; sedentary (SED), exercise training (TRA), RVS extract ingestion (RVE), and RVS extract ingestion and exercise training (RVE-TRA). TRA and RVE-TRA were trained on treadmill with increasing speed gradually and administered 10 mL/kg/d of Rhus Verniciflua extract orally to RVE and RVE-TRA. In order to analyze antioxidant function, blood SOD (superoxide dismutase), GSH-Px (glutathione peroxidase), and MDA (malondialdehyde) were examined. And, analysis of inflammatory cytokines were examined using IL-6 (interleukin-6), TNF-
(tumor necrosis factor-alpha), CRP (C-reactive protein), and NO (nitric oxide). SOD in TRA was significantly higher than SED and RVE (p<0.05), and RVE-TRA was highest among the groups (p<0.05). The MDA content of TRA, RVE and RVE-TRA were significantly lower than SED. GSH-Px activity of SED was significantly lower than other groups (p<0.05). IL-6 and TNF-
content of RVE and RVE-TRA were significantly lower than SED and TRA (p<0.05). CRP concentration of SED was the lowest among groups (p<0.05). Finally, NO concentration of SED and TRA were higher than RVE and RVE-TRA (p<0.05). These results suggested that it is efficient for rats to reduce lipid peroxidation and induce anti-inflammatory by taking RVS extract during exercise training. Afterwards, if studies on the properties of RVS extract can be made with various ways, use of Rhus Verniciflua trees might be made widely which are growing naturally in mountains in Korea.
Evaluation Model Building and Application for Suitable Locations Reflecting Recreation Forest Types
Kim, Hyun-Sik ; Hwang, Hee-Yun ; Ban, Yong-Un ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 111~124
This study has intended to develop an evaluation model to select suitable locations of recreation forests in accordance with their types, and to apply the models to the feasibility study of selecting suitable recreation forest locations of candidate sites. To reach this goal, this study employed a Delphi expert survey method and Analytic Hierarchy Process (AHP) for the whole process of model building. And the followings are what this study has found during model building and application process. First, the assessment criteria for classifying recreation forests and selecting suitable locations were initially identified through justification process with two rounds of expert review, after broken down into 2 categories, and then further divided into 6 items and 12 indicators accompanying with hierarchical structure. Second, in the third phase of Delphi expert survey, the relative weights of the assessment criteria were derived by employing AHP. Through overlaying two evaluation categories including resource and usability, 4 types of recreation forest were presented. In the forth phase of the Delphi survey, this study has developed an evaluation model to select suitable locations of recreation forests in accordance with their types using relative weights of the selected indicators through. This study has applied the models to the feasibility study of selecting suitable recreation forest locations of candidate sites, and found that the usability of recreation forest was severely affected by the distance from the capital region, that the closer the locations of natural recreation forests from the capital region, the more advantageous. The developed model can be used to designate recreation forests in accordance with their types.
Use of the Temporary Immersion Bioreactor System for Mass Production of Eucalyptus pellita Plus Tree
Kim, Seon-Ja ; Park, So-Young ; Moon, Heung-Kyu ; Lee, Wi-Young ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 125~130
The application of bioreactor culture techniques for plant micropropagation is regarded as one of the ways to reduce production cost by scaling-up and automation. In an attempt to optimize mass proliferation systems in Eucalyptus pellita, four types of bioreator systems including temporary immersion system with or without net were tested. Highest growth was achieved with 30-min flushes of medium at every 4-h intervals in TIN (temporary immersion with net) system. Results indicate over three-fold increase in shoot growth with the TIN system when compared with TIX (control: temporary immersion without net) system which is without net in bioreactor. Furthermore, plants produced from the TIN system increased total chlorophyll content, chlorophyll a/b and dry matter, giving higher yields of acclimatized plants. Our findings suggest that plantlet growth increases with appropriate exposure to media at correct intervals, as well as use of net for maintaining aerobic condition in the vessels. The TIN system thus has great potential for in vitro mass production of Eucalyptus clones commercially.
Studies on the Agroforestry Methods of Wild Edible Greens (IV) - Water Relations Parameters of Three Ligularia Species Leaves Obtained from P-V Curves -
Han, Sang-Sup ; Lee, Kyeong-Cheol ; Jeon, Seong-Ryeol ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 131~135
This study was carried out to establish a proper cultivation condition and diagnose the drought-tolerance of three wild edible greens belonging to genus of Ligularia by using pressure-volume curves methods. The result of the original bulk osmotic pressure at maximum turgor
was -0.8 MPa in Ligularia fischeri and L. stenocephala, which was somewhat lower than the value, -0.7 MPa, in L. fischeri var. spiciformis. In addition, the values of the osmotic pressure at incipient plasmolysis
in L. fischeri and L. stenocephala, both of which were -0.9 MPa, These were slightly lower than that of -0.8 MPa in L. fischeri var. spiciformis. On the other hand, it appeared that the values of maximum bulk modulus of elasticity
of L. fischeri and L. stenocephala were approximately two times higher than that of L. fischeri var. spiciformis. However, There was a distinct difference between the values of the relative water contents in these three species. Therefore, Ligularia spp, occurring incipient plasmolysis in the high water contents, have a relatively low property of drought-tolerance, suggesting that growth of those Ligularia spp. are appropriate for relative moisture forest.
Stand Density Control by Selection System in Pyungchang Area, Gangwon Province
Baek, Ju-Hyoun ; Yim, Jong-Su ; Shin, Man-Yong ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 136~143
This study was conducted to provide basic information on the management of natural deciduous forests by presenting suitable stand density over time for natural deciduous forests in Pyungchang Area. The stand density index(SDI) for the sampling point was also computed. The cutting scenarios were adopted by considering the SDI estimated in the sampling point. And then, simulation cutting was enforced to the stand. Cutting scenarios consisted of three cutting levels, with the period of 5 years where each suitable cutting level of selection system will not have the SDI over the maximum SDI throughout 30 years and consider harvest after 30 years. As a result of the simulation cutting, it was found that removing 12% and 14% of basal area per each time kept proper stand density while removing 10% exceed to the adequate basis. From an economic point of view, it was concluded that removal 12% of basal area would be the most suit cutting level in selection system.
Analysis of Growth Characteristics and Aboveground Carbon Storage for Zelkova serrata Artificial Forests in Gwangneung Experimental Forest
Kim, Hyun-Seop ; Bae, Sang-Won ; Lee, Sang-Tae ; Hwang, Jae-Hong ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 144~152
This study was conducted to analyze the growth characteristics and aboveground carbon storage for old growth Zelkova serrata artificial forests (site1: age class IX, site2: age class VIII) in Gwangneung Experimental Forest. The trees were classified by crown classes for analyzing forest stand structure. The growth characteristics were analized through ringwidth increment by crown classes and stem analysis of dominant trees. There were a wide range of DBH (site1: 8~62 cm, site2: 14~40 cm) and height (site1: 8~26 m, site2: 12~26 m) distributions and revealed different growth characteristics by crown classes in both sites. The mean annual increment (MAI) of ringwidth for the last 5 years of dominant trees for site1 (3.3 mm) was higher than MAI of ringwidth of total growth period (2.3 mm) and MAI of ringwidth for the last 5 years of dominant trees for site2 (2.2 mm) was equal to MAI of ringwidth of total growth period (2.2 mm). Also, the growth increment of ringwidth by crown classes had significant differences between dominant tree and the others crown classes (p<0.01) in both sites. As a results of stem analysis of dominant trees in both sites, there were similar to their volume between site1 (1.106
) and site2 (1.035
). In spite of old age, the annual increment of volume has been increasing steadily until recent year. Meanwhile, total aboveground carbon storage of site1 (65.6 Mg C
) was higher than that of site2 (56.1 Mg C
). The proportion of dominant and co-dominant trees to total aboveground carbon storage was more than 90% and the greatest individual aboveground carbon storage by crown classes was dominant tree in all both sites. However, individual aboveground carbon storage of dominant tree in site1 had 0.054 Mg C
more than site2 owing to the differences from average DBH of dominant trees by sites. We think that these results will contribute to the forest practice for Zelkova serrata artificial forests as a basic information.
Stand Structure and Seedling Recruitment of Abies holophylla Stands in Yong-In Area, Gyeonggi
Park, Pil-Sun ; Jeon, Yoon-Goo ;
Journal of Korean Forest Society, volume 99, issue 1, 2010, Pages 153~162
Abies holophylla Maxim. is a shade tolerant species that has potential to be used for continuous cover forestry system. Stand structure and natural regeneration of A. holophylla stands in Yong-In area located in the central part of Korea was investigated to estimate the self sustainability of A. holophylla plantation. Species composition, diameter at breast height (DBH) and height distribution of trees larger than 2 cm DBH were measured in ten stands in three study sites of Jeongsu-ri, Daedae-ri, and Hodong. Species and coverage of shrub layer, and A. holophylla seedlings were also investigated. While A. holophylla in non-managed stands (Jengsuri and Daedae-ri study sites) had the importance value of 40% and showed continuous diameter and age distribution, A. holophylla in Hodong site had narrow bell-shaped DBH distribution mostly concentrating between 25-35 cm DBH classes, and single canopy structure. Abies holophylla stands in Hodong have experienced occasional thinning and selective cutting. The correlation coefficient between age-DBH was significant but low (
=0.2, P=0.03), and similar aged A. holophylla had diverse DBH values. Continuos DBH distribution and multi-canopy structure of A. holophylla stands in Jeongsu-ri site show that natural regeneration of A. holophylla has been continuously occurred in this area. Seedling density of A. holophylla was between 2000 and 33000/ha, however, the number of trees in 2-5 cm DBH class was only 40-150 trees/ha, implying that the survival rate of seedlings is not high. Continuous natural regeneration and 0.6 cm/year of diameter growth rate of A. holophylla indicate that this area could be an appropriate habitat for this species, and A. holophylla plantation in this region seem to persist suggesting the possibility of managing the stands for continuous cover forestry system as well as selective harvesting practices.