• Korean Journal of Plant Resources
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• v.33 no.2
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• pp.106-115
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• 2020

In order to find out the relationship between spring phytophenological index and temperature index for the past nine years (2010~2018), this study identified the relationship between temperature changes and trends in spring phytophenological index of sprouting, flowering and leaf unfolding of Pinus densiflora Siebold & Zucc., Larix kaempferi (Lamb.) Carrière, Quercus mongolica Fisch. ex Ledeb., Rhododendron mucronulatum Turcz., Lindera obtusiloba Blume and Acer pseudosieboldianum (Pax) Kom. in Daegu Arboretum, Palgong mt., Juwang mt. and Gaya mt. The change in temperature was caused by an increase in the monthly average temperature between March and April compared to February for nine years, and the average temperature of Daegu Arboretum and Palgong mt. were higher by region. The sprouting, flowering and leaf unfolding were the fastest of the Lindera obtusiloba and the slowest of the Pinus densiflora for each species, and the fastest plant season in Daegu arboretum came. SPI (Spring Phytophenological Index) tends to advance by -1.267~-6.151/9 years, with the largest Pinus densiflora (-6.151/9 years), with the lowest rate of change for Rhododendron mucronulatum (-1.267 days/9 years). Species which shows significant values in sprouting, flowering and leaf unfolding is Rhododendron mucronulatum and Pinus densiflora, which correlate with the mean temperature of January to March. As a result of checking the time series change of SPI, the change rate in the four regions was all negative and the phenolocal index was all accelerating. Among them, the rate of change was greater in inland areas such as Daegu arboretum, Palgong Mt. and Gaya mt. and the rate of change was slightly lower in the case of Juwang mt., which is somewhat distant.

• The Korean Journal of Ecology
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• v.16 no.1
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• pp.75-91
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• 1993

Structure and dynamics of Abies koreana community in Mt. Gaya were studied to provide the basic data for conservation of Abies koreana community, an endemic species in Korea. A. koreana community of this study site was composed of tree layer (4~7m), subtree layer (2~4m), shrub layer (1~2m), and herb layer (below 1m). The heights of tree and subtree layers were low. Floristic composition showed that this study site was subalpine and dry site. In frequency distribution diagram of diameter classes of major species consisting of A. koreana community, those of both A. koreana and other species showed reverse J-shaped types. From these results, it was estimated that A. koreana community of this site might be maintained continuously as a stable climax state like present state. In the spatal distribution diagram of major species, saplings of A. koreana were established under the canopy of A. koreana and Pinus koraiensis and under the dead tree of A. koreana. From these results, it was known that A. koreana saplings were recruited before the community was disturbed and regeneration was accomplished by advance regeneration pattern, in which these saplings established before occurrence of disturbance fill with open site originated from death of mature tree. Growth of annual rings was variable among individuals, it was estimated that such variation was originated in that growth of each individual relates to microclimatic conditions rather than macroclimatic ones. Ecological longevity of A. koreana in this study site estimated by disturbance types and age of dead trees was about 120 years.

• Journal of Environmental Science International
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• v.27 no.11
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• pp.1049-1057
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• 2018

This study aims to analyze and compare environmental attitudes of interest groups, including visitors, local residents, Buddhist monks, and staff of the Korea National Park Service in Gayasan National Park. To achieve this purpose, five hypotheses were formulated and tested. While three hypotheses were statistically rejected, two were accepted. In every interest group, the environmental attitude level of women was higher than that of men. Local residents particularly showed statistically significant differences in accordance with occupation. The difference in environmental attitude between visitors and local residents was not statistically significant. Finally, the environmental attitude level between interest groups was divided into three groups. The staff of the Korea National Park Service showed the highest level of environmental attitude, followed by Buddhist monks, and a group of visitors and residents recorded the lowest. However, the average level of environmental attitude of every interest group scored above the mid-point of 3. Therefore, it can be concluded that there exists no difference between or conflicts among interest groups related to strengthening conservation and management policies regarding the protection of Gayasan National Park.

• Korean Journal of Soil Science and Fertilizer
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• v.23 no.3
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• pp.180-187
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• 1990

This experiment was conducted to find a methode reducing peant empty pods when it was cultivated on a newly reclaimed upland soil in Kimjae, Jeonbuk, Korea. Liming materials, slaked lime and dolomite were applied to the soil at two levels : lime requirement amount neutralizing the soil and one of 1.5 times. The results are summarized as the followings. 1. There was a yield increase of 27% from the field applied 1.5 times amount of dolomite Compared to that of slaked lime. The number of empty pods per plant was at the lowest level with the treatment of higher amount of dolomite. 2. At the maturing stage of the plant there was a positive significant correlation observed between the content of MgO and other parameters such as no, of branchs per plant dry weight per plant, no, of pods per plant and 100 seed-weight. But the correlation between MgO content and the no of empty pods was negatively significant at 5% level. 3. The content of CaO and MgO was significantly correlated to hull and pod volumes, pod surface area, hull thickness and hull weight. 4. Correlation coefficients between yield and the contents of Ca and Mg in soil at mauring stage were $0.572^{**}$ and $0.556^{**}$ respectively.

• Korean Journal of Environment and Ecology
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• v.20 no.2
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• pp.188-199
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• 2006

The purpose of this study was to provide data for conservation management of Pinus densiflora forest by analyzing ecological characteristics and the change of Pinus densiflora community structure for fifteen years in Gayasan National Park. According to the results of TWINSPAN analysis of Pinus densiflora forest, there were twenty plots(unit: $500m^2$)and it was classified into seven community types. The dominant species were Pinus densiflora in canopy layer, Carpinus laxiflora, Quercus variabilis, Quercus serrata in the understory layer and Sasa borealis, Rhododendron mucronulatum, Rhus trichocarpa in the shrub layer. The index of shannon's diversity was from 0.6803 to 1.2559 per $500m^2$ and the range of species number was from twenty-seven to fourty. As a result of the change of Pinus densiflora forest structure, the importance percentage(I.P.) of Carpinus laxiflora, Quercus variabilis, Quercus serrata in the understory layer were increased for fifteen years. The index of shannon's diversity changed $0.2608{\sim}1.0124\;into\;0.5547{\sim}1.2567\;per\;500m^2$ and species number changed $14{\sim}26\;into\;26{\sim}34$ for fifteen year.

• Journal of the Korean Wood Science and Technology
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• v.10 no.3
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• pp.200-200
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• 1982

1. 전국의 산림은 산림개발의 유행에 따라 마음과 같이 3개권역으로 구분한다. 가. 용재림 개발권 주요산맥을 연하는 오지대(奧地帶) 나. 풍치림 개발권 고속도변(좌우 4km범위) 도시주변 공원지구, 기타 토지대 다. 농용림 개발권 전 가, 나 속에 속하지 않는 야산지대 2. 3대 개발권별로 우선 개발할 지역을 연차적으로 지정한다. 3. 개발지역을 지정시는 미리 산림의 용도를 구분하여 시정 고시한다. 4 개발지역내의 산주는 개발우도에 따라 개발의무를 진다. 5. 산주가 개발의무 불이행시는 대집행(代執行)으로 개발을 수행한다. 6. 대집행(代執行)은 가. 산림개발공단 나. 산림 경영을 하고 있는 능력있는 개인 또는 법인 다. 산림조합(산련, 산림포함)으로 하며, 산림청장이 지정한다. 13. 개발지역 내에서의 확정된 개발계획은 기존영림 계획에 우선한다. 14. 개발지역 내에서의 개발사업 수속절차는 이 법으로 일원화 한다. 7. 산주가 대집행자에 대하여 비용변상이 없는 한 이 양자간에는 수익(收益) 분배를 하여야 하며, 본계약의 장기 보장을 위하여 저당권 설정을 한다. 8. 산림개발의 중추적 대집행자인 동시에 경영자로서 시범적이며, 집단적인 산림개발과 임도시설 관리를 전담하는 산림개발 공단을 설립한다. 9. 장기처리와 융자지원을 위하여 산림개발 자금을 200억원 한도로 설치하고 이의 관리 운영을 전담할 산림개발 금고를 별도 법율로서 설립한다. 10. 산림개발 기금은 다음 재원으로 조성한다. 가. 국유임야 관리 특별회계의 잉여금 나. 임목의 벌채자 및 원목 수입이용 가공 판매자에 과하는 기금부담금 다. 매년 정부 예산에서 정하는 재원 11. 개발지역내에서는 취득세, 소득세, 등록세, 상속세, 양여세, 기타 공과금의 감면등 세제상의 특전을 부여한다. 12. 개발지역내에서의 산림도벌 무허가벌채등 산림 사범은 가중 처벌한다.

• Korean Journal of Soil Science and Fertilizer
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• v.11 no.4
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• pp.283-295
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• 1979

A new Farmland Expansion and Development Promotion Law was enacted in 1975. This law authorizes the Government to undertake development within a declared "reclamation area", wherever the land owners are unable to do so. In order to give additional impetus to conversion of waste hilly land into productive farmland, these hilly land development projects were conducted as large scale scheme which include soil fertility improvements such as the application of lime and phosphate. Farmland Expansion and Development Promotion Corps has attempted to undertake annual farm surveys in order to obtain some information about hilly land agriculture and farming operations within the reclamation project areas since 1976. As survey data accumulates, more and more clear picture of hilly land farming come to appear and enable us to conduct in-depth study. Effects of such upland reclamation include converting of previously unproductive slopeland into cultivable farmland for lucrative and commercial farming or food production. Furthermore, idle or marginal resources such as farm labor, equipment and compost would be fully employed. Socio-economic effects would include increases in land value and attitude change of farmers. On the other hand the preservation of natural environments might be damaged to the some extend by the projects. As shown in Table 7, the average farm size increased from 3,156 pyeong($3.3m^2$) to 5,562 pyeong, a 76.2% increase. The proportion of small farms with less than I ha dropped from 59.8% to 34.4%, but that of the large farms over 2 ha rose from 13.1% to 32.0% (See Table 8). The survey results indicate that as the farming on reclaimed uplands become time-honored, the acreage devoted for food crop production decreases against the economic crop growing acreage (see Table 6). For example, in the case of uplands reclaimed in 1972, the ratio of food crop acreages decreased from 99.7% in 1972 to 62.5% in 1977, whereas that of economic crop acreages increased from 0.3% in 1972 to 37.5% in 1977. The government used to actively encourage the farmers to carry out food crop production in the reclaimed upland targting toward the realization of self-sufficiency in food grains. It is, however, apparent that the farmers did hardly take the government advises as far as their economic interest were concerned. Yield per 10a. of various crops from the reclaimed uplands by year were surveyed as seen in Table 12. On the average, barley production in the reclaimed areas achieved 83.3% of the average unit yield from the existing upland in its 5 th year. Soybean yields showed a modest increase from 64% in the first year to 95%, in the 5 th year. In contrast, economic crops such as red pepper, totacco and radish achieved their maximum target yields in 3 years from starting to cultivate on the reclaimed farms. In order to test the post economic viability, an economic analysis was performed for each of selected subprojects on the basis of the data obtained through survey. The average actual internal economic rate of return on upland reclamation investments was found to be 20.3% which exceeded other types of projects of land and water development such as tidal land reclamation, irrigation or paddy rearrangement. The actual IRRs of subcategories of upland reclamation projects varied from 17.9% to 21.4% depending upon the kinds of cropping system adopted in each reclaimed areas such as food, economic, fruit or forage crops.

• Korean Journal of Plant Resources
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• v.19 no.1
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• pp.189-195
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• 2006

We investigated the genetic variation in Stewartia koreana Nakai by examining 61 I-SSR amplicons in 120 individuals distributed among six natural populations in Korea. The overall percentage of polymorphic I-SSR amplicons was 81.9% and mean number of amplicons per I-SSR primer was 12.2. Levels of genetic diversity within 6 populations were similar each other[Shannon's Index $0.358{\sim}0.467$(mean: 0.407)]. The Mt. Obong population had the highest level of genetic diversity and was most distinctive from the other populations. Most variation existed among individuals within population(88.2%). Genetic differentiation among populations(${\phi}_{ST}$) was 0.118. The UPGMA dendrogram based on the genetic distance failed in showing decisive geographic relationships.

• Korean Journal of Environment and Ecology
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• v.3 no.1
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• pp.51-69
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• 1989

To investigate edge vegetation structure and edge species in Kaya Mountain National Park, field survey was executed from July to August, 1989 and the result are as follows. Cantilevered and advancing types of edge vegetation were observed on site, The relative importance values of major species were changed along distance from edge to forest interior and were seemed to be affected by aspect, soil moisture and present tree layer vegetation. Especially, light-oriented species were observed as a codominant species under pine tree canopy due to selective allelopathy effect and thin canopy. Ecological indices according to the distance from edge to forest interior did not show regular pattern, but edge depth was estimated as 15-20m, approximately, Dominant species of edge seemed to be affected by soil moisture rather than altitude and aspect, but floristic similarities seemed to be affected by altitude. Frequency classes of edge species were different by aspect, altitude and physiogra-phical location. Lespedeza maximowiczii, Weigela subsessilis and Fraxinus rhynchophylla showed high frequency class in all environment conditions.

• Journal of Forest and Environmental Science
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• v.28 no.4
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• pp.289-294
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• 2012

This study was conducted from April 2012 to June 2012 to analyze breeding status of Black woodpeckers (Dryocopus martius) in the Gayasan National Park. Nest height, tree diameter which a nest built and altitude at the nest site of Black woodpeckers were 17.4 m, 63.8 cm and 587 m, respectively. A pair of Black woodpeckers completed a clutch in 4 eggs on 7 May and 3 of eggs hatched on 24 May 2012. Both female and male incubated eggs and never left eggs without one of parents. A male more contributed to build a nest than a female. Incubation duration was higher in a male than in a female. Nestlings made a begging call in a nest during the growing period. Begging frequency of nestlings increased from 11 days up to 20 days after hatching. After then, nestlings reduced begging and fledged a nest 24 days after hatching. This study provided information of breeding ecology to protect and manage population of Black woodpeckers which are endangered species in South Korea.