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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 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
Development of Evaluation Indices for Forest Landscape Classification
Kang, Mi-Hee ; Kim, Seong-Il ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 777~784
The purpose of this study was to develop evaluation indices for forest landscape classification. The indices were chosen to enable forest managers to establish effective landscape management strategies through three times of focus group interviews and email survey with experts. The 13 landscape evaluation indices were finally divided into four categories. They were ecological health (degree of green naturality, degree of ecological naturality, disease and insect damage, crown vitality), aesthetic visual quality (naturalness, harmony, diversity, traditionality, aesthetic appreciation, rarity), and sensitivity (level of tourism/recreational use), interruptions (damaged land, artificial structures). The five-level was suggested for the forest landscape classification system.
The External Effects of Mountaineering on Medical Expenses
Lee, Yeon-Ho ; Shin, Won-Sop ; Yeoun, Poung-Sik ; Lee, Jeong-Hee ; Bae, Young-Mok ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 785~790
The paper aims to estimate the external effects of mountaineering on medical expenses within national economy. Though there is no difference in the participation ratio of mountaineering among sexes or income levels, the ratio of the elderly is higher than that of younger. The medical expenses have negative correlation with mountain climbing times and climbing frequencies, but this correlation is insignificant statistically. Without mountaineering, the medical expenses of Korea would increase by 2.8 trillion Won (4.6%). Therefore the policy to support usual mountaineering must save the medical expenses more than other policies. and the increase of public expenditure on mountaineering can decrease the deficit of government budget through the positive external effects on national medical expenses.
Approaches for Developing a Korean Model Through Analysis of Overseas Forest Soil Carbon Models
Lee, Ah-Reum ; Yi, Koong ; Son, Yo-Whan ; Kim, Rae-Hyun ; Kim, Choon-Sig ; Park, Gwan-Soo ; Lee, Kyeong-Hak ; Yi, Myong-Jong ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 791~801
Forest soil carbon model is a useful tool for understanding complex soil carbon cycle in forests and estimating dynamics of soil carbon to climate change. However, studies on development and application of the model are insufficient in Korea. The need for development of Korean model is now growing, because there are notable problems and limitations for adapting overseas models in Korea to meet the requirements of the international organizations such as IPCC, which demands highly reliable data for national reports. Therefore, we have studied 7 overseas forest soil carbon models (CBM-CFS3, CENTURY, Forest-DNDC, ROMUL, RothC, Sim-CYCLE, YASSO), analyzed and compared their structure, decomposition mechanism, initializing process and, input and output data. Then we evaluated applicability of these models in Korea with three criteria; availability of input data, performance of model, and possibility of regional modification. Finally, a systematic process for applying a new model was suggested based on these analyses.
Application of Fuzzy Linear Programming to Estimate the Potentiality of Domestic Long-Term Wood Supply
Won, Hyun-Kyu ; Kim, Young-Hwan ; Lee, Kyeong-Hak ; Jang, Kwang-Min ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 802~807
The objective of this study was to estimate potential of domestic long-term wood supply by using fuzzy linear programming (FLP). In order to construct a numerical formula model, maximization of total timber production was used for the objective function. Size limit of harvesting and sustained yield were used as the constraints. The results of comparison between LP and FLP were shown that LP is more suitable than FLP in terms of the amount of timber production and final forest stock. However, as long-term sustained yield was limitedly achieved by using LP, FLP was more desirable for prediction of potential wood supply. According to the results of this study, the potential of annual domestic wood supply was estimated about 10.5 million cubic meters. Gyeong buk, Jeon nam, Gangwon and Gyeong nam province were highly ranked in order of provincial potential of wood supply.
Investment Beneficial Analysis of Culture of Mountain Medical Plant Resources - Open field Culture of Schizandra -
Park, Yong-Bae ; Kim, Jae-Sung ; Kim, Ki-Dong ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 808~815
This study is to give informations about management Situations and investment returns to someone who will newly cultivate schizandra or expand area of culture. This study used IRR, B/C Ratio and NPV for beneficial analysis. We surveyed fifty one among schizandra cultivation farmhouses in chief producing districts Gangwon Inje, Gyeongbuk Munkyung, Kyungnam Sancheong and Jeonnam Whasoon in Korea from May till September in 2009. So this study surveyed about inputted labors and materials, land price and etc. by working process to calculate producing and operating cost. Fruits of schizandra are sold from 5,000 won to 6,000 won per kg at locals. And IRR(Internal Rate of Returns), B/C Ratio and incomes ratio is calculated by three senarios 5,000 won, 5,500 won and 6,000 won per kg at locals. Discount rate is 3.00%. As the result of this study IRRs are -16.00%, -6.91%, 0.40% one after another and B/C Ratios are 0.81, 0.89, 0.97 one after another. And schizandra cultivation isn't profitable. When price of schizandra fruits is 6,200 won per kg, IRR is 3.00% and B/C Ratio is 1.00. Therefore, if price of schizandra fruits is over 6,200 won per kg, we judge that it is profitable. And income ratio is 23.9% on 6,200 won per kg.
The Types and Processes of Corporate Philanthropy Programs on Forestry in Korea 500 Companies
Kim, Jae-Hyun ; Chang, Chu-Youn ; Tae, Yoo-Lee ; Kim, Hae-Chang ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 816~826
The purpose of this study is to investigate the types and processes of corporate philanthropy programs on forestry in Korea 500 largest companies. The result shows that 75 companies of Korea 500 companies (15.0%) participated in corporate philanthropy program related to forestry and there are 113 programs that those companies are proceeding. The types of 108 programs can be divided into 5 parts; 1) volunteer work, 2) creating forests & management, 3) one-time planting work, 4) forest education, 5) training experts & job creation. Among them, volunteer work (55.6%) and creating forests & management (29.6%) showed high proportion. The process of programs depends on their types. The volunteer and one-time planting work were mainly proceeded directly by corporate volunteer organization. But creating forests & management, forest education and training experts & job creation were usually proceeded in consort with local governments, NPOs and NGOs, and so on. These results show that Korean corporate philanthropy in forestry is progressing to strategic philanthropy through participation and partnership of various social groups. This shows the possibility to progress corporate community investment (CCI) with forest education and training experts & job creation.
Estimating the Spatial Distribution of Forest Stand Volume in Gyeonggi Province using National Forest Inventory Data and Forest Type Map
Kim, Eun-Sook ; Kim, Kyung-Min ; Kim, Chong-Chan ; Lee, Seung-Ho ; Kim, Sung-Ho ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 827~835
Reliable forest statistics provides important information to meet the UNFCCC. In this respect, the national forest inventory has played a crucial role to provide the reliable forest statistics for several decades. However, the previous forest statistics calculated by administrative district has not provided spatial information in a small scale. Thus, this study focused on developing models to estimate an explicit spatial distribution of forest growing stock. For this, first, stand volume model by stand types was developed using National Forest Inventory(NFI) data. Second, forest type map was integrated with this model. NFI data were used to calculate plot-level stand volume and basal area. The stand types of NFI plot including the species composition, age class, DBH class and crown density class are very crucial data to be connected with forest type map. Finally, polygonlevel stand volume map was developed with spatial uncertainty map. Average stand volume was estimated at 85.7
/ha in the study area, and at 95% significance interval it was ranged from 79.7
/ha to 91.8
Study of Cosmeceutical Activities of Hovenia dulcis var. koreana Nakai Extracts
Kim, Sea-Hyun ; Jun, Dong-Ha ; Jang, Min-Jung ; Lee, Jin-Tae ; Lee, Chang-Eon ; Han, Jin-Gyu ; Kim, Jin-Chul ; Lee, Do-Hyung ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 836~842
Hovenia dulcis var. koreana Nakai has been reported to liver function improvement effect as functional materials for food and medicine. On these facts, biological activity and safety test were conducted to evaluate biological activities of the fruit petiole and root extracts of H. dulcis as a potential cosmeceutical ingredient. Cosmeceutica activities of different extracts were examined by l.l-diphenyl-2-picrylhydrazyl (DPPH) radical generation, the ABTS+ cation decolorization, tyrosinase activity, collagenase activity and elastase activity compared with the properties of the commercial antioxidant butylated hydroxytoluene (BHT) and L-ascorbic acid (AA). The antioxidant activities HDFW, HDFE, HDRW and HDRE were 83.6%, 39.6%, 85.9% and 74.5% in DPPH assay, 99.5%, 13.7%, 96.4% and 88.6% in ABTS assay. Tyrosinase inhibitiory activities HDFW were 56.0% at 1,000 ppm. Measured the inhibition effect of the H. dulcis about collagenase and elastase where break the peptide bonds in collagen and enzyme from the class of proteases where exists in the dermis. The H. dulcis was inhibition the two kind enzymesm, collagenase activities being on a high scale inhibition, was same concentration. Uses the anti oxidation effect and a anti-wrinkle effect of this resultant H. dulcis and with the functional cosmetics use is thought with the fact that will be possible.
Photosynthetic Activity of Quercus acutissima Seedlings Grown under Artificially Acidified Soil Conditions
Jin, Hyun-O ; Bang, Sun-Hee ; Lee, Choong-Hwa ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 843~848
The effects of soil acidification on the photosynthetic activity of Quercus acutissima seedlings were investigated. We measured the growth and photosynthetic activity of the seedlings in relation to soil acidification. The dry weights of the seedlings were reduced according to the amount of
in the soil. The concentrations of Al in needles at the 90 meq
were significantly higher than those at the control. The contents of chlorophyll in needles at 90 meq
were significantly lower than those at the control. The net photosynthetic rates of the seedlings in the acidified soil were reduced by increasing the amount of
to the soil. The carboxylation efficiencies(CE) of photosynthesis were reduced in the seedlings grown in the acidified soil. These results suggested that the soil acidification induced the inhibition of photochemical reactions and
fixation of photosynthesis.
Variation of Seed and Germination Characteristics of Natural Populations of Abies koreana Wilson, a Korean Endemic Species
Song, Jeong-Ho ; Jang, Kyung-Hwan ; Hur, Seong-Doo ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 849~854
This study was conducted to investigate the variation of seed and germination characteristics among populations and among individuals within populations of Abies koreana Wilson distributed in Korea. Cones was collected from 4 natural populations and their seven seed qualities as well as three germination behaviors was measured and tested. Statistical analysis showed that there were significant differences among populations as well as among individuals within populations in 8 traits except for percentage of sound seeds and seed vigor. Coefficients of variation in percentage of sound seeds, germination percentage and germination rate is relatively high (43.8~57.2%) compared to other traits (11.0~28.3%). The germination of seed started on the seventeen day after sowing and it was completed within seventy-nine days. The final seed germination capacity was found high except for Mt. Duckyu (8.5%) and varied from 39.7% to 47.7%. Mean germination time ranged between 38.1 and 43.6 days and germination rate varied from 1.98 to 1.39 ea./days. As a result of simple correlation analysis between seed characteristics and germination characteristics, the percentage of sound seeds showed a significant positive correlation with the germination percentage and the germination rate but showed a negative correlation with the mean germination time.
Vegetation Type and Stand Structure of Pinus densiflora Forests in Samcheok and Taebaek of Kangwon Southern Region
Lee, Kwang-Su ; Kim, Suk-Kwon ; Bae, Sang-Won ; Lee, Jung-Hyo ; Jung, Mun-Ho ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 855~862
The objectives of this study were to analyze vegetation types and stand structures of the red pine (Pinus densiflora) in Kangwon southern region for stable and sustainable forest management. The pine forests in study sites were classified into 4 communities, 2 groups, so total 6 vegetation units. Species with high constance degree were Quercus mongolica, Rhus trichocarpa, Lindera obtusiloba, Lespedeza maximowiczii, Quercus serrata, Spodiopogon sibiricus, Aster scaber and Fraxinus sieboldiana. In the importance value(I.V.) analysis of each layer, P. densiflora showed highly in tree layer while in other layers competitive broad-leaved species such as Quercus spp. were high. P. densiflora also showed large size of DBH, while broad-leaved species distributed middle and small DBH. The annual ring growths of P. densiflora and competitive broadleaved species were variable according to area, site condition, tree year and species, it is considered that appropriate silvicultual practice methods should be employed to remove rival broad-leaved species for maintenance of sustainable red pine forests considering the characteristics of each stand.
Weather Characteristic and Growth of a Forest Ginseng Cultivation Site
Lee, Dong-Sup ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 863~870
We investigated geographical condition and soil characteristic of ginseng cultivation site. At all sites, crown density adjusted by 80%. and Air and soil temperature were also measured. The geographical condition vary ato all sites. and soil shows similar characteristics with typical forest soil of Korea. The results shows the Air temperature needs to be higher than
for seed budding at April When soil temperature reach at 8, leaf of foest ginseng starts to bud. A forest ginseng is influenced by forest type, planting type and budding rates. In the case of a seedling planting, an seeding emergence rate is high, but the rate is decreased rapidly after three years On the other hand, direct seeding shows lower seedling emergence rate, but survival rate is higher than seedling-planting.
Effects of Host Tree Species, Temperature and Humidity on ex vitro Seed Germination in Endangered Species of Loranthus tanakae
Lee, Su-Gwang ; Lee, Song-Hee ; Park, Kwang-Woo ; Kwon, Yeong-Han ; Kang, Ho-Duck ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 871~877
This study was conducted to investigate the effects of host tree species, temperature and humidity on ex vitro for seed germination in endangered species of Loranthus tanakae. In addition, we compared seed shapes between Loranthus tanakae and Viscum album that we could have easily shown in ex vitro condition. Seeds were germinated after one week inoculation and followed to develop radicles. Seed germination rates of Loranthus tanakae were 80~95% in most of the experimental conditions. The highest rate of holdfast penetrated to host plants was 72% in Populus alba var. pyramidalis among 13 different species tested at
. Also the rates of their penetration were 57% in Morus bombycis, 55% in Acer palmatum and 42% in Castanea crenata at
. Seeds were germinated under condition without irrigation and followed to withered in 12 weeks later. Stages of seed germination of the Loranthus tanakae were followed by radicle induction, holdfast development, haustorium formation and penetration in order in total period of 14 weeks.
Ozone Sensitivity of Physiological Indicators for Stress Evaluation in Four Families of Quercus aliena Blume
Kim, Du-Hyun ; Han, Sim-Hee ; Lee, Jae-Cheon ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 878~884
Ozone sensitivity of physiological indicators and the difference of ozone tolerance on 4 families of Quercus aliena seedlings were investigated on the basis of the standardized physiological indicators. Photosynthetic parameters, photosynthetic pigment and malondialdehyde (MDA) content, and antioxidative enzyme activities were measured or analyzed from the leaves of Q. aliena seedlings at the end of ozone fumigation, and ozone tolerance indices among 4 families were calculated with the standardized physiological parameters. After ozone treatment, the reduction of carboxylation efficiency was observed in the leaves of four families, and their reduction were ranged from -24.1% to -56.9% of control seedlings. Photosynthetic pigment content differed significantly among 4 families and treatments. The reduction of total chlorophyll content showed the highest in family SU4 (-40.6%) and the lowest family US2 (-18.8%). Ascorbate-peroxidase (APX) activity showed significant difference among families and treatments, and increased as compared with control in three families, except for family US2. On the basis of the physiological indices, ozone tolerance of four families was ranked in the order of US1 > SU4 > US2 > SU1. In conclusion, photosynthetic parameters, pigment content and APX activity were recommended as appropriate indicators to assess the tolerance against ozone stress of Q. aliena.
Antioxidant Effect of the Fraction Isolated from Pyrus ussuriensis Leaves
Lee, Chang-Eon ; Kim, Young-Hun ; Lee, Byung-Guen ; Lee, Do-Hyung ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 885~890
This study was conducted to confirm the application as ingredients of cosmetics through an examination of the function for anti-oxidant activity of the fraction isolated from Pyrus ussuriensis leaves. The dried leaf of Pyrus ussuriensis were extracted with acetone-
(6:4, v/v), concentrated and fractionated with the upper layer of acetone on a separatory funnel. Each fraction was freeze dried, then a portion of acetone soluble powder was chromatographed on a Sephadex LH-20 column using a series of aqueous methanol as eluents and also used the MIC-gel using a series of aqueous methanol as developing solvent. The isolated compounds were identified by silica-gel TLC. The concentration of total phenolic compound of Pyrus ussuriensis acetate soluble fraction was high, 914 mg/g. The results obtained from the analyses of the anti-oxidanat effects of Pyrus ussuriensis acetate fraction can be summarized as follows: In the result of DPPH scavenging radical activity, Pyrus ussuriensis acetate soluble fraction showed more than 80% at 100 ppm. SOD-like activity of one of Pyrus ussuriensis acetate soluble fractions was 77% at 1000 ppm. Xanthine oxidase inhibition of Pyrus ussuriensis acetate soluble fraction was 38% at 100 ppm. From these results, we confirmed that acetate fraction of Pyrus ussuriensis has a great potential as a natural ingredients with a natural antioxidant and antimicrobial source.
Estimation of Economic Valuation of Forest Landscape Function Using Conditional Logit Model
Kim, Eui-Gyeong ; Kim, Dong-Hyeon ; Yoo, Jin-Chae ; Kim, Mi-Ok ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 891~899
The purpose of this study is to estimate economic value of forest landscape function using conditional logit model, applied by Choice Experiment. For the study, we have chosen attributes and levels of forest landscape. In specific, topographical forest type, forest type, forest density, recreational factor (side trip, accessibility of valley) and WTP were included in attributes. Based on factors, we have made 48 choice sets with Balanced and Orthogonal form using SAS 9.1. The efficiency of questionnaire was 6.02 (D-Error: 0.1) and choice set and socio-economic variable were selected. In order to reduce cognitive load of respondent, 96 choice sets were divided into 4 types in questionnaire so that respondent could respond to 12 choice sets respectively. Population was citizens from 7 metropolitan cities including Seoul, and the interview survey was conducted to find out average annual WTP per household for the total 280 interviewees. As a result, In the Non-ASC model, Mcfadden'
had 0.21, and Log Likelihood: -2,631. Average annual WTP per household for forest landscape was 266,723 Won(Korean currency).
Estimating the Conservation Value of Recreation Forests in Chungbuk through CVM
Kang, Kee-Rae ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 900~907
Recreation forests are offer to personal development through recreation, education about nature, association with people, mind relaxation in forests. Most efficient method for measuring Recreational value of natural forest is economic approach, and Obtained by this approach, visitors to the recreational forests and other people will be able to explain recreational value. The value of the environment goods are not traded in the market, it's real value is difficult to measure. People have appreciated the value of the natural environment but it is not easy to answer the question how much monetary value a natural enjoy prosperity environment. This study is involved in giving the right recognition to the value of recreation and environment by estimating economically the value of the environment in which visitors stay, and presenting the appropriate price. The environmental value of a recreation forests is estimated through contingent valuation method (CVM). The annual recreation value per person of surveyed recreational forests is WTP with a mean between about \14,000 and 16,500. The recreation value of one recreational forest surveyed is annually between approximately 1.2 billion won and 1.4 billion won. The annual recreation value of Chungbuk Province recreation forests is presumed to be between about 15 billion won and 16.9 billion won.
The Relationship Between Tree Radial Growth and Topographic and Climatic Factors in Red Pine and Oak in Central Regions of Korea
Byun, Jae-Gyun ; Lee, Woo-Kyun ; Nor, Dae-Kyun ; Kim, Sung-Ho ; Choi, Jung-Kee ; Lee, Young-Jin ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 908~913
This study analyzed the impact of climatic and topographic factors on tree radial growth of Pinus densiflora and Quercus spp. in central regions of Korea. To find the relationship between annual tree radial growth and climatic factors, we took the core samples from individual trees and measured the tree radial width. On the assumption that the tree radial growth is related to the tree age, we estimated the radial growth by the tree age as an independent variable. Also, we estimated the standard growth, defined as the radial growth of trees aged 30. As results, we found the spatial auto-correlation in the radial growth of the red pine. Moreover, we also found the relationships between climatic and topographic and the standard growth using the GAM (Generalized Additive Model). Increase of temperature has negative impacts on the radial growth of Pinus densiflora, while it has positive impacts on the radial growth of Quercus spp.. On the other hands, increase of precipitation has negative impacts on the radial growth of both species. Lastly, we predicted the spatial distribution changes of Pinus densiflora and Quercus spp. using the temperature increase scenario and the Geographic Information System (GIS) based forest type map. We could predict that Pinus densiflora is more vulnerable than Quercus spp. to climate change so that the habitats of Pinus densiflora will be gradually changed to the habitats of Quercus spp. in eastern coastal and southern regions of Korea after 60 years.
Above-and Belowground Biomass and Net Primary Production for Pinus densiflora Stands of Cheongyang and Boryeong Regions in Chungnam
Seo, Yeon-Ok ; Lee, Young-Jin ; Pyo, Jung-Kee ; Kim, Rae-Hyun ; Son, Yeong-Mo ; Lee, Kyeong-Hak ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 914~921
This study analyzed the above-and belowground biomass, net primary production, stem density, and biomass expansion factors for Pinus densiflora stands of Cheongyang and Boryeong regions in Chungnam. The total dry weights in Cheongyang and Boryeong regions were 122.36 kg/tree and 137.68 kg/tree while the aboveground biomass for these two regions were 72.23 Mg/ha and 143.27 Mg/ha, respectively. Total(above-and belowground) biomass were 91.77 Mg/ha and 178.98 Mg/ha, respectively. Net primary production of above-and belowground biomass in Cheongyang and Boryeong regions were 8.69 Mg/ha, 10.03 Mg/ha, 16.00 Mg/ha and 18.66 Mg/ha, respectively. Stem density (g/
) was 0.457 and 0.421 while the above and total biomass expansion factors were 1.394~1.662 and 1.324~1.639, respectively. These results suggested that stand density and site quality could be influenced on the biomass and net primary production of the two regions. In addition, the results of this study could be very useful to calculate carbon sequestrations by applying stem density values and biomass expansion factors for Pinus densiflora in these two regions.
Effect of Calcium Chloride(
) on Chlorophyll Fluorescence Image and Photosynthetic Apparatus in the Leaves of Prunus sargentii
Sung, Joo-Han ; Je, Sun-Mi ; Kim, Sun-Hee ; Kim, Young-Kul ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 922~928
There is a little information on the effect of calcium cloride (
) which is used as deicing salt in Korea on the physiological responses of the street trees. Prunus sargentii is one of the most widespread tree species of street vegetation in Korea. In this study, the effect of
on photosynthetic apparatus such as chlorophyll fluorescence image and light response curve of P. sargentii in relation to their leaf and root collar growth responses were investigated. To study the effect of
treatment in the early spring, we irrigated twice in rhizosphere of P. sargentii (3-year-old) planted plastic pots with solution of 0.5%, 1.0%, 3.0%
concentration before leaf expansion. Results after treatments, total chlorophyll contents and the chlorophyll a/b, photosynthetic rate, quantum yield, dark respiration decreased with increasing
concentration. On the contrary, light compensation point increased with increasing
concentration. Through the linear regressions of correlation of photosynthetic rate with photosynthetic parameters (quantum yield, dark respiration and light compensation point), we found a significant relationship (p<0.05) between photosynthetic rate and quantum yield and light compensation point except dark respiration. Calcium cloride (
) induced inhibition of photochemical efficiency (
) and non-photochemical quenching (NPQ) were found in treatments of
, and these reduction rates between control and CaCl2 treatments were drastically showed at 80 days. We suggest that physiological activities are limited from treatment of
. These reductions of photosynthetic apparatus ability caused eventually the reduction of leaf and diameter at root collar growth.
Estimating the Uncertainty and Validation of Basic Wood Density for Pinus densiflora in Korea
Pyo, Jung-Kee ; Son, Yeong-Mo ; Lee, Kyeong-Hak ; Kim, Rae-Hyun ; Kim, Yeong-Hwan ; Lee, Young-Jin ;
Journal of Korean Forest Society, volume 99, issue 6, 2010, Pages 929~933
According to the IPCC guideline (2006), uncertainty assessment is very important in terms of the greenhouse gas inventory. Therefore, the purpose of this study is to estimate the basic wood density (BWD) and its uncertainty for Pinus densiflora in Korea. In this study, Pinus densiflora forests were divided into two ecotypes which were Gangwon and Jungbu regions. A total of 33 representative sampling plots was selected to collect sample trees after considering the tree ages and DBH distributions. The BWD showed statistically no difference between age classes based on IPCC's classification. While, it showed statistically difference(pvalue=0.0017) between eco-types. The BWD and uncertainty was 0.396(g/
) and 12.9(%) for Pinus densiflora in Gangwon, while it was 0.470(g/
) and 3.8(%) for Pinus densiflora in Jungbu. The values of the BWD uncertainty for Pinus densiflora were more precised than the values given by the IPCC guideline.