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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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Korean Forest Society
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Volume & Issues
Volume 104, Issue 4 - Dec 2015
Volume 104, Issue 3 - Sep 2015
Volume 104, Issue 2 - Jun 2015
Volume 104, Issue 1 - Mar 2015
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The Current Status and Challenges of Forest Landscape Models
Ko, Dongwook W. ; Sung, Joo Han ; Lee, Young Geun ; Park, Chan Ryul ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 1~13
DOI : 10.14578/jkfs.2015.104.1.1
Korea now boasts a vastly forested landscape resulting from a successful forest restoration projects carried out in the past several decades. However, Korea's forest now face new challenges, such as the rapidly increasing mature forests, climate change, and various novel forest disturbances with both natural and anthropogenic causes. Considering the extensive spatial and temporal scale of the forests and the challenges it face, it is necessary to utilize a tool that can properly tackle the issues with such nature. This brings our attention to Forest Landscape Models, which have been actively developed and used to improve our understanding of how forests respond to a variety of changes and to satisfy the society's demand on forests and its ecosystem services. A large variety of Forest Landscape Models exist, with a wide spectrum of algorithms, various selections of ecological processes they simulate, and the spatial and temporal scale they utilize, so that any researcher may find a model that fits one's use. However, it is important to properly understand the properties of such models so that the right model is used and the results are aptly interpreted. In this study, we describe and characterize the various Forest Landscape Models based on their historical roots, lineages, and development, ecological characteristics, and computational aspects, and discuss how they can be classified and what limits should be recognized to assist in model selection and utilization.
The Classification and Species Diversity of Forest Cover Types in the Natural Forest of the Middle Part of Baekdudaegan
Hwang, Kwang-Mo ; Chung, Sang-Hoon ; Kim, Ji-Hong ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 14~25
DOI : 10.14578/jkfs.2015.104.1.14
This study was carried out to classify forest communities and to aggregate forest cover types for the complex and diversified natural forest areas of Guryongsan, Sobaeksan, Baekhwasan, Sokrisan, and Baekhaksan in the middle part of Baekdudaegan. The vegetation data were collected by point-centered quarter sampling method. One thousand one hundred fourteen sample points were subjected to cluster analysis to classify 27 forest communities, which were aggregated into 7 representative forest cover types on the basis of community similarity from composition of canopy species. They were Quercus mongolica forest cover type, mixed mesophytic forest cover type, Q. variabilis forest cover type, Pinus densiflora forest cover type, the others deciduous forest cover type, Q. serrata forest cover type, and subalpine forest cover type. The Q. mongolica forest cover type was most widely distributed in the study areas. It was assumed that abundance of Q. mongolica might be negatively associated with species diversity. Mixed mesophytic forest cover type and the others deciduous forest cover type were commonly distributed in the areas of valley, on the other hand, Q. mongolica cover type and P. densiflora cover type tended to be distributed in the areas of ridge.
Growth of Containerized Chamaecyparis obtusa Seedlings as Affected by Fertilizer and Container Volume
Jae, Dai-Young ; Seo, Huiyeong ; Cho, Hyun-Seo ; Ahn, Hyun-Chul ; Kim, Choonsig ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 26~34
DOI : 10.14578/jkfs.2015.104.1.26
This study was carried out to evaluate the growth characteristics, carbon and nitrogen content of containerized 1-0 Chamaecyparis obtusa seedlings at various levels of fertilizer (2 g/L, 1 g/L, control) and three container volumes (500 mL, 400 mL, 320 mL). The growth of root collar diameter was highest in the 2 g/L (3.14 mm), followed by the 1 g/L (2.75 mm) and control (2.41 mm) treatments, while the height of seedling was significantly higher in the 1 g/L (21.88 cm) than other treatments (2 g/L: 20.92 cm; control: 19.06 cm). The growth of root collar diameter by container volume was better in the 500 mL than in the 320 mL. Dry weight of seedling was the highest in the 1 g/L (
), followed by the control (
) and the 2 g/L (
) treatments. The dry weight of seedlings by container volume was significantly higher in the 500 mL than in the 320 mL. Nitrogen concentration in foliage was ranged from 1.51% in the control to 2.45-2.60% in the fertilizer treatments. However, carbon concentration of seedlings was not affected by the fertilizer or the container volume treatments. The growth of seedlings following planting in mountain area was better in the fertilized seedlings compared with in the unfertilized seedlings. The results indicate that the 1 g/L fertilization was an optimum rate for growth following planting of Chamaecyparis obtusa seedlings.
Analysis on Growth Characteristics of Landscape Trees in Apartment Complex -Focusing on Metropalace Complex, Daegu Metropolitan City-
Jung, Mun Hwa ; Jung, Sung Gwan ; Choi, Chul Hyun ; Shin, Jae Yun ; You, Ju Han ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 35~42
DOI : 10.14578/jkfs.2015.104.1.35
The purpose of this study is to offer the raw data for improving the method of landscape planting in apartment complex by objective surveying and analysing the growth ratio by type and ground planted in landscape tree. The results are as follows. In the survival ratio of tree, Pinus densiflora was the highest and Abies koreana was the lowest in evergreen tree. In case of deciduous tree, the species of the highest survival ratio were Diospyros kaki, Zelkova serrata, Prunus mume, Lagerstroemia indica and Ginkgo biloba. There showed that Sorbus commixta and Chaenomeles sinensis had the lowest survial ratio. In case of tree growth by types, Pinus strobus was the highest and Pinus densiflora var. globosa was the lowest among evergreen trees. Among deciduous trees, the growth ratio of Zelkova serrata was the highest, and the trees showed the lowest growth were Lagerstroemia indica, Magnolia denudata and Cornus officinalis. Pinus strobus, Cornus kousa, Ginkgo biloba, Chionanthus retusa and Acer palmatum were good growth in natural ground, and Zelkova serrata and Prunus armeniaca var. ansu were good in artificial ground. In the future, if you study the growth characteristics and shrubs that are excluded from the study of landscape trees in various locations are expected to derive objective data.
The Short-term Effects of Soil Brought and Subsoil Inversion on Growth and Tissue Nutrient Concentrations of Fraxinus rhynchophylla, Pinus densiflora, and Pinus koraiensis Seedlings in a Nursery
An, Ji Young ; Park, Byung Bae ; Byun, Jae Kyung ; Cho, Min Seok ; Kim, Yong Suk ; Han, Si Ho ; Kim, Se Bin ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 43~49
DOI : 10.14578/jkfs.2015.104.1.43
The production of high quality seedlings is a very important phase in silvicultural systems for successful reforestation or restoration. The purpose of this study was to quantitatively measure both growth performances and nutrient responses of Fraxinus rhynchophylla, Pinus densiflora, and Pinus koraiensis seedlings, which are commercially planted in Korea, according to the different types of soil improvement treatments. We applied soil brought (hereafter 'brought'), subsoil inversion (hereafter 'subsoil'), and mixture of brought soil with soil on nursery bed (hereafter 'mixing') in a permanent national nursery. Silt and clay contents were the highest at the subsoil treatment and organic material, soil nitrogen and phosphorus concentrations were the lowest at the brought treatment. The growth of F. rhynchophylla was the lowest at the subsoil treatment, but there were no significant differences among treatments. There were significant differences in only root nutrient concentrations of F. rhynchophylla among treatments: nitrogen, phosphorus, and potassium concentrations were the lowest at the subsoil or brought treatment. Mixing treatment increased N contents with deduction of N concentrations ('dilution') because of more dry weight increase compared with the amount of N uptake. This study suggested mix of brought soil with soil on a nursery bed in a permanently used nursery can economically be an effective technique to improve soil quality.
Seasonal Variation in Photosynthetic Characteristics and Chlorophyll Content of the Loranthus tanakae, Viscum album var. coloratum and its Hosts in Korea
Lee, Sugwang ; Lee, Seong Han ; Woo, Su Young ; Kang, Hoduck ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 50~59
DOI : 10.14578/jkfs.2015.104.1.50
We investigated seasonal variation in photosynthetic characteristics and chlorophyll content of the Loranthus tanakae, Viscum album var. coloratum and its hosts in Korea. The maximum photosynthesis and transpiration rate of L. tanakae were
PAR (photosynthetically active radiation) in June,
PAR in July, respectively. The maximum photosynthesis and transpiration rate of V. album var. coloratum were
PAR in Autumn,
PAR in Autumn, respectively. V. album var. coloratum was able to conduct photosynthesis in November whereas its host and L. tanakae were not able to conduct photosynthesis. Especially transpiration rate of L. tanakae were always higher than its host and V. album var. coloratum. The chlorophyll a+b contents of L. tanakae was
in July, V. album var. coloratum was
in June, and chlorophyll a/b ratio of L. tanakae was 1.7~3.7, V. album var. coloratum was 1.1~4.5, depend on season.
Effects of Seed Storage Methods and Shading on Seed Germination and Seedling Growth of Endangered Species, Iris dichotoma and Iris setosa
Lee, Su Gwang ; Kim, Hyo Yun ; Lee, Ki Cheol ; Ku, Ja Jung ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 60~66
DOI : 10.14578/jkfs.2015.104.1.60
This study was conducted to determine the effects of seed storage method (
wet 30 days,
wet 60 days, stratification and room temperature) and shading treatment(control, 50%, 80%) on seed germination, seedling growth of endangered species, Iris dichotoma and Iris setosa. As a result, seed germination rate of I. dichotoma was the highest at 75% when seed were stored at
wet 60 days and then sown under non-shading condition. The seed of I. dichotoma belong to intermediate seed. Seed germination rate of I. setosa was the highest at 95% when seed were stored at
wet 60 days and then sown under 80% shading condition. The seed of I. setosa belong to recalcitrant seed. Seedlings of I. dichotoma and I. setosa showed not only the best seedling quality but also seedling vigor index in seed stored at
wet 60 days under non-shading condition, with the growth characteristics of plant height (6.4, 7.2 cm), number of leaves (3, 4), leaf width (4.6, 3.2 mm), leaf length (5.7, 6.8 cm), fresh weight (aerial/root part; 144/260, 97/153 mg), dry weight (aerial/root; 31/20, 17/17 mg) and seedling vigor index and modified seedling vigor index (13,895/9,479, 13,256/8,668). In this research, I. dichotoma and I. setosa seed were stored at
wet 60 days, and then sown in non-shading condition, seed germination rate was more than 75%, 90%, respectively, and production of superior quality seedlings.
Mountain-cultivated Ginseng Ripened into Persimmon Vinegar Ingestion on Fat Storage and Metabolic Protein Expression in Diet-controlled Rats
Lee, In-Ho ; Kim, Pan-Ki ; Ryu, Sungpil ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 67~75
DOI : 10.14578/jkfs.2015.104.1.67
This research is to investigate the four years growth mountain-cultivated ginseng ripened twenty-two weeks into four years fermented persimmon vinegar (tentatively: Sansamcho) ingestion on obese-related factors during dietary control. The Sansamcho was ingested orally, two times a day, after every meal for six weeks to the male rats. Groups were divided into the control (CON), the restricted diet (RD), and the weight cycling (WC). And, each groups has its own sub-groups as the -control (-CON), 2.5 times diluted Sansamcho ingestion (-MPV2.5), and 5.0 times diluted Sansamcho ingestion (-MPV5.0) groups, respectively. The number of rat was consisted of seven in each group. After six weeks rearing periods was done, abdominal fats (retroperitoneal fat, mesentery fat, and epididymal fat) and energy metabolic-related protein (AMPK: AMP-activated protein kinase; PPAR-
: peroxisome proliferator-activated receptor-
; and CPT-1: carnitine palmitoyltransferase-1) were weighed and analyzed. Amount of stored fat was significantly or tended to decrease by Sansamcho ingestion. In addition, sum of fats increasing were suppressed by the material. On the contrary, energy metabolism-related protein expression was significantly increased or tended to increase by Sansamcho ingestion. This results suggested that increased energy metabolism using Sansamcho was restrained effectively visceral fat store by high-fat diet and/or dietary control. In other words, it has a good function to suppress weight cycling which is the most insoluble problem. Therefore, the fusion material, Sansamcho, may expect to utilize as the obese-suppression-food.
Effect of Bedsoil on Cutting Propagation of Old Growth and Protected Tree of Salix chaenomeloides Kimura
Song, Hyun Jin ; Jeong, Mi Jin ; Kim, Hak Gon ; Seo, Young Rong ; Im, Hyeon Jeong ; Yang, Woo Hyeong ; Park, Dong Jin ; Yun, Seok Lak ; Ma, Ho Seop ; Choi, Myung Suk ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 76~83
DOI : 10.14578/jkfs.2015.104.1.76
Old growth and protected-trees are worth history and culturally in Korea. This research carried out to investigate habitat characterization and the vegetative propagation methods of Salix chaenomeloides(100-600 years old trees) in Gyeongsangnamdo Province. It has been preserved in good and grow naturally in area surrounding village(4 trees), riverside(1 tree) and field(1 tree). Cutting from old growth and protected trees was conducted using 10 kinds of bedsoils. It was survived above 93% in all bedsoils. Growth of cuttings is a distinct difference according to bedsoils and tree ages. Growth of cutting was high on CBS, followed mixed bedsoils(VPMP) including vermiculite, peatmoss and perlite. Root collar diameter was difference depend on tree ages and bedsoils. All trees are produced 1 to 4 branch. Root growth of cutting was 20 cm on CBS and VPMP, which is the best shoot growing on cutting. Bedsoil with physico-chemical characteristics of high moisturizing ability, high air permeability, high EC value and slightly acid may be suitable for efficiently cutting propagation of old growth and protected S. chaenomeloides. CBS and VPMP bedsoil are favorable for propagating this species by cuttings.
Effects of Mild Heat and Organic Acid Treatments on the Quality of 'Daebo' Peeled Chestnut during Storage
Oh, Sung-Il ; Kim, Mahn-Jo ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 84~89
DOI : 10.14578/jkfs.2015.104.1.84
The effects of dip treatments of chemicals (ascorbic acid, citric acid, calcium chloride: 1% solution) and physicals (vacuum packing,
distilled water) on the browning and quality of 'Daebo' peeled chestnut were studied. During the storage, the surface color of the samples showed higher
values and lower L values than that of the initial sample. The color with the normal packing treatment hardly changed, unlike in the chemical and physical treatments. The calcium chloride treatment showed less color change than other treatments. The marketable quality was maintained for 10 days with the normal packing and for 35 days with the chemical and physical treatments. Thus, the chemical and physical treatments, especially with vacuum packing after 1% calcium chloride treatment, extended the shelf-life of the 'Daebo' peeled chestnut by inhibiting the browning.
Growth Performances of Container Seedlings of Deciduous Hardwood Species Grown at Three Different Fertilization Treatments
Cho, Min Seok ; Yang, A-Ram ; Hwang, Jaehong ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 90~97
DOI : 10.14578/jkfs.2015.104.1.90
The objective of this study was to find optimal amount of fertilization of container seedling production for Zelkova serrata, Ulmus parvifolia, Betula costata and Tilia amurensis. To reach our goal, we measured root collar diameter (RCD), height, biomass and seedling quality index (SQI) of container seedlings of four deciduous hardwood species grown at three different fertilization treatments (
). Z. serrata seedlings grown at
fertilization and B. costata seedlings grown at
fertilization showed the highest RCD, height, biomass and SQI. The RCD and height of U. parvifolia and T. amurensis seedlings showed no significant differences by fertilization treatments. Seedlings of two species at
fertilization showed the lowest SQI, however, SQI at 1.0 and
fertilization treatments were not significantly different. Based on these results, it is appeared that container seedlings of Z. serrata at minimum
fertilization, U. parvifolia and T. amurensis at
fertilization and B. costata at maximum
fertilization were optimal nutrient conditions. Practice of optimal fertilization rate will make us get better quality seedlings and reduction of production costs in the container nursery system as well as good field performances with higher survival rate after planting.
Running stability analysis of the Semi-Crawler Type Mini-Forwarder by Using a Dynamic Analysis Program
Kim, Jae-Hwan ; Park, Sang-Jun ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 98~103
DOI : 10.14578/jkfs.2015.104.1.98
This study was conducted to analyze the running stability of a semi-crawler type mini-forwarder. The running stability analysis was performed by using a dynamic analysis program, RecurDyn. Physical properties of the semi-crawler type mini-forwarder was performed by using 3D CAD modeler, AutoCAD 3D. As a result from the computer simulation of stationary sideways overturning, it was found that the semi-crawler type mini-forwarder runs safely on a road with a slope not bigger than
regardless whether it is empty or loaded, but in case of a road with a slope bigger than
, it is assumed that it is difficult for the car to run safely due to some dangers. In addition, it was found that the critical slope of its sideways overturning gets much smaller when empty since the location of its gravity center is elevated and much higher when it is loaded. As a result from the computer simulation of its hill-climbing ability, since the running speed is unstable in case of a road with a vertical slope not smaller than
, it is assumed that it is safe to drive it on a road with a slope not bigger than
. Taking a look at the result from an analysis of the running safety when it passes an obstacle, it was observed that a front tire comes off the ground when the running speed of the car is 5 and 4 km per hour respectively when it is empty and loaded while the gravity center of the front tire is watched. When taking a look at the changes in the location of the gravity center of the rear wheel crawler shaft, it was not found that the shaft comes off the ground at the test speeds both when it is empty and loaded.
Allometric Equations for Crown Fuel Biomass of Pinus koraiensis Stands in Korea
Kim, Sungyong ; Jang, Mina ; Lee, Byungdoo ; Lee, Youngjin ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 104~110
DOI : 10.14578/jkfs.2015.104.1.104
The objective of this study was to develop allometric equations for the estimation of crown fuel biomass of Pinus koraiensis in Korea. A total of twenty four representative sample trees were destructively sampled in Gapyeong, Hongcheon, and Jeongseon. Crown fuels were weighed separately for each fuel category by size class and by living and dead. The results of this study showed that the needles contributed the largest biomass (16.6 kg, 34.7%), followed by live branches with size ranging from 2~4 cm (9.0 kg, 18.9%), 1~2 cm (6.6 kg, 13.8%), <0.5 cm (5.1 kg, 10.6%), 0.5~1 cm (4.9 kg, 10.3%), and dead branches (3.2 kg, 6.8%), while the live branches with 4 cm (2.4 kg, 4.9%) as the lowest. The adjusted coefficient of determination values were the highest (
) and standard error of estimate were the lowest (S.E.E.=0.2018~0.7271) in allometric equation
. The available fuels that are consumed during crown fires (i.e., needles and twigs with diameter less than 1 cm) comprised 55.6% of the total crown fuel biomass.
Applicability Evaluation of a Mixed Model for the Analysis of Repeated Inventory Data : A Case Study on Quercus variabilis Stands in Gangwon Region
Pyo, Jungkee ; Lee, Sangtae ; Seo, Kyungwon ; Lee, Kyungjae ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 111~116
DOI : 10.14578/jkfs.2015.104.1.111
The purpose of this study was to evaluate mixed model of dbh-height relation containing random effect. Data were obtained from a survey site for Quercus variabilis in Gangwon region and remeasured the same site after three years. The mixed model were used to fixed effect in the dbh-height relation for Quercus variabilis, with random effect representing correlation of survey period were obtained. To verify the evaluation of the model for random effect, the akaike information criterion (abbreviated as, AIC) was used to calculate the variance-covariance matrix, and residual of repeated data. The estimated variance-covariance matrix, and residual were -0.0291, 0.1007, respectively. The model with random effect (AIC = -215.5) has low AIC value, comparison with model with fixed effect (AIC = -154.4). It is for this reason that random effect associated with categorical data is used in the data fitting process, the model can be calibrated to fit repeated site by obtaining measurements. Therefore, the results of this study could be useful method for developing model using repeated measurement.
Estimations of Forest Growing Stocks in Small-area Level Considering Local Forest Characteristics
Kim, Eun-Sook ; Kim, Cheol-Min ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 117~126
DOI : 10.14578/jkfs.2015.104.1.117
Forest statistics of local administrative districts have many social needs, nevertheless we have some difficulties for working out an accurate statistics because of insufficient data in small-area level. Thus, new small-area estimation method has to set aside additional data, decrease errors of statistics and consider the local forest characteristics at the same time. In this study, we researched the spatial divisions that can set aside additional data for statistics production and satisfy the major premise, which is "forest characteristics of spatial divisions have to be equal to that of small-area". And we compared synthetic estimation methods based on three different spatial divisions(provinces, neighbor districts and new expanded districts). New expanded districts were divided based on the criteria of climate, soil type and tree species composition that affects local forest characteristics. Small-area statistics were assessed in terms of the ability to estimate local forest characteristics and consistency within large-area statistics. As a result, new expanded districts synthetic estimation was assessed to calculate statistics that reflects local forest characteristics better than other two estimation methods. Moreover, this synthetic estimation method produced the statistics that was included within 95% confidence interval of large-area statistics and was the closer to large-area statistics than the neighbor districts synthetic estimation.
The Forest Experience Program and Improvement of Depression, Anxiety, and Self-concept in Adolescents
Chang, Jisoon ; Kim, Nam Young ; Lee, Suk Hee ; Kim, Bongseog ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 127~132
DOI : 10.14578/jkfs.2015.104.1.127
Aim of this study was to investigate the influence of forest experience program on depression, anxiety, and self concept in adolescents living in urban area. A total of 47 adolescents living in Seoul, South Korea were recruited for the study and participated in a series of forest experience programs that the Korea National Park Service had developed. Before and after applying the program, their depression, anxiety, and self concept were evaluated using Children's Depression Inventory (CDI), Revised Child Manifest Anxiety Scale (RCMAS), and Offer Self Image Questionnaire-Revised (OSIQ). The outcome measures were analyzed using paired-t tests. CDI score was significantly reduced after the program (before:
). Excluding 16 participants whose scores of Lie Scale in the RCMAS were more than 8 on the analysis, the total RCMAS score showed significant reduction after the program (before:
). There was no significant difference in the total score of the total self-image scale in the OSIQ. However, the Self-confidence (SC) which was used as subscale of the OSIQ was significantly higher after the program (before:
), and the Idealism scale (I) in the OSIQ increased significantly after the program (before:
). On our analysis, the forest experience program showed considerable positive effects on depression and anxiety in adolescents. This result leads the postulation that the program might be helpful for adolescents to adapt to their surrounding experiences and to achieve improvement in interpersonal relationship.
The Influence of Forest Experience Program on Physiological and Psychological States in Psychiatric Inpatients
Kim, Min-Hee ; Wi, An-Jin ; Yoon, Byoung-Sun ; Shim, Bong-Sup ; Han, Young-Hoon ; Oh, Eun-Mi ; An, Ki-Wan ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 133~139
DOI : 10.14578/jkfs.2015.104.1.133
In modern society, we are disconnected from nature and under a lots of stress. And this is cause of the various diseases. Also than in the past, People experiencing mental health problems and Psychiatric Inpatient rates appear to have increased. This study was performed to investigated the influence of forest experience program on Psychiatric Inpatients's mood and depressive state, stress responses. The subject of this study were 25 patients in the N Hospital in Naju, who were divided into an experimental group (n=12) and a control group (n=13), and experiment was conducted form 20 to March 29, 2013. Its effect was verified by utilizing the K-POMS-B and BDI, saliva. According to results of this study, there were improvements in their depressive state and degree of stress state. There was a meaningful difference(p<0.01). However, Cotrol group, these difference were not found.
Physiological and Psychological Effects of Walking Around and Viewing a Lake in a Forest Environment
Song, Chorong ; Lee, Juyoung ; Ikei, Harumi ; Kagawa, Takahide ; Miyazaki, Yoshifumi ; Park, Bum-Jin ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 140~149
DOI : 10.14578/jkfs.2015.104.1.140
The aim of this study was to clarify the physiological and psychological effects of walking around and viewing a lake in a forest environment. The subjects included 11 male Japanese university students (age:
years) who were randomly assigned to visit either a forest or an urban (control) setting. They were instructed to walk a predetermined 15-min course and to view the setting from a seated position for 15 min. Heart rate variability, heart rate, blood pressure, pulse rate, and salivary cortisol levels were measured to assess the subject's physiological responses to the environment. Four questionnaires (SD method, reports of "refreshed" feeling, POMS, and STAI) were administered to assess the subjects' psychological responses. It was found that walking around and viewing a lake in a forest environment can suppress sympathetic nerve activity, increase parasympathetic nerve activity, and decrease the heart rate, blood pressure, pulse rate, and cortisol levels. In addition, a forest environment can enhance the "comfortable," "soothing," "natural," and "refreshed" feelings, improve the mood state, and reduce anxiety. These results provide scientific evidence of the physiological and psychological effects of forest therapy.
The Preference Analysis of Adults on the Forest Therapy Program with regard to Demographic Characteristics
Kim, Youn-Hee ; Kim, Eun-Jin ; Kim, Dong-Jun ; Yeoun, Pyung-Sik ; Choi, Byung-Jin ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 150~161
DOI : 10.14578/jkfs.2015.104.1.150
The purpose of this study was to obtain the basic data for the effective development and operation of forest healing by analysing the preference of adults on the forest therapy program. The survey of 516 normal adults on the forest therapy program was conducted. Using SPSS 21.0 Program, data analysis of descriptive statistics and correlation analysis of each program confirmed number of covariate, and so we conducted a factor analysis to short meaningful data. And then we looked at the forest healing program preference difference according to demographic characteristics(sex, age, residence, occupation) through reliability analysis, frequency analysis, T-test, analysis of variance(ANOVA). Facter analysis was performed by use of the VariMax orthogonal rotation factor analysis to abbreviate 37 forest therapy program. Through this, the program has been reduced such as 7 program group(1: psychology-based treatment, 2: teaching and counselling-based treatment, 3: camping and forest bath-based treatment, 4: diet-based treatment, 5: nature and plant-based treatment, 6: meditation-based treatment, 7: respiration and yoga-based treatment) and 7 independent programs(1: sleeping in the forest, 2: vision quest, 3: soaking in water, 4: walking wearing shoes, 5: viewing the forest, 6: mountaineering, 7: athletics in the forest). With this criterion, the forest therapy program difference in accordance with sex, age, residence, occupation has been investigated. First, it was verified that there was a significant difference between male and female in the group of such as psychology-based treatment, diet-based treatment, mountaineering. Second, there appeared a significant difference in groups such as teaching and counselling-based treatment, camping and forest bath-based treatment, nature and plant-based treatment, respiration and yoga-based treatment, athletics in the forest. Third, according to the residence, there appeared a significant difference in groups such as psychology-based treatment, teaching and counselling-based treatment, diet-based treatment, nature and plant-based treatment, meditation-based treatment, vision quest, mountaineering, athletics in the forest. Fourth, according to the occupation, there appeared a significant difference in groups such as nature and plant-based treatment, medication-based treatment, vision quest, walking wearing shoes, viewing the forest, mountaineering. As shown before, it seems to be necessary that we should be mindful of this investigation which shows variety of preference of adults on the forest therapy program according to demographic characteristics. We expect the results of this study to be utilized as basic data for the development of forest therapy program targeting on adults.
Estimating Willingness to Pay of Korean Forest Owners for Forest Products Disaster Insurance Premiums
Kim, Myeong-Eun ; Min, Kyung-Taek ; Koo, Ja-Choon ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 162~168
DOI : 10.14578/jkfs.2015.104.1.162
The purposes of this study are estimating willingness to pay (WTP) of forest owners for the disaster insurance premium for forest products in Korea and investigating factors affecting their WTP. The result with contingent valuation method shows that forest owners' median WTP is
. Advanced forest managers including devoted forest managers and forestry successors are willing to pay more for insurance premium compared to non-advanced ones, and those who have experienced disaster in their own forest land have higher WTP than others. WTP of advanced forest managers appears to be 50% higher than that of non-advanced. These results imply that policy makers should consider advanced forest managers as a priority to introduce the insurance system.
Consumer Consumption Behavior and Preference of Salted Wild Vegetable: A conjoint analysis with Allium victorialis
Kim, Ki Dong ;
Journal of Korean Forest Society, volume 104, issue 1, 2015, Pages 169~178
DOI : 10.14578/jkfs.2015.104.1.169
The purpose of this study is to obtain the basic information for developing new product and marketing strategies of salted wild vegetable. This study analyzes consumer's consumption behavior and preference on salted Allium victorialis using the conjoint analysis. The result shows that 'Container' is the most important factor among various attributes of salted Allium victorialis, followed by 'Origin of Salting Sauce Soy', 'Price', 'Traditional Food Quality Certification', and 'Area of production'.