• 한국환경과학회지
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• 제30권10호
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• pp.803-809
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• 2021

This study aimed to investigate the effects of soil amendment (heat-expanded clay and active carbon) and planting of Dendranthema zawadskii var. latilobum on the remediation of salt-affected soil and the plant growth under high calcium chloride (CaCl₂) concentration. The experimental group comprised treatments including Non treatment (Cont.), heat-expanded clay (H), active carbon (AC), planting (P), heat-expanded clay+planting (H+P), active carbon+planting (AC+P). A 200 mL solution of CaCl₂ at a concentration of 10 g·L^-1 was applied as irrigation once every 2 weeks. Compared to the Cont., the incorporation of the 'heat-expanded clay' amendment decreased electrical conductivity of the soil leachate and cation exchange capacity, whereas the growth of Dendranthema zawadskii var. latilobum was relatively increased. These results suggest that the combination of 'heat-expanded clay' amendment and planting will mitigate negative effect of de-icing salts and improve plant growth in salt-contaminated roadside soils.

• 한국기후변화학회지
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• 제6권3호
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• pp.243-248
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• 2015

This study was conducted to predict the changes of potential distribution for invasive alien plant, Conyza bonariensis in Korea. C. bonariensis was found in southern Korea (Jeju, south coast, southwest coast). The habitats of C. bonariensis were roadside, bare ground, farm area, and pasture, where the interference by human was severe. Due to the seed characteristics of Compositae, C. bonariensis take long scattering distance and it will easily spread by movement of wind, vehicles and people. C. canadensis in same Conyza genus has already spread on a national scale and it is difficult to manage. We used maximum entropy modeling (MaxEnt) for analyzing the environmental influences on C. bonariensis distribution and projecting on two different RCP scenarios, RCP 4.5 and RCP 8.5. The results of our study indicated annual mean temperature, elevation and temperature seasonality had higher contribution for C. bonariensis potential distribution. Area under curve (AUC) values of the model was 0.9. Under future climate scenario, the constructed model predicted that potential distribution of C. bonariensis will be increased by 338% on RCP 4.5 and 769% on RCP 8.5 in 2100s.

• 한국환경복원기술학회지
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• 제10권4호
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• pp.95-108
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• 2007

Test application of revegetation measure was made on the roadside slope damaged by Nongseo-Eomo national road improvement project in a bid to prevent the soil from being washed out as well as to restore the ecological environment, and the survey for assessment of the effect of slope revegetation measures was conducted, beginning May 11 through Nov 7, 2006. In the wake of comprehensive reviewing and evaluating the surrounding topographic environment, physical and chemical characteristics of soil, germination of revegetation plants, analysis of bio mass, covering ratio and the plants appeared, measure b was found to have been most appropriate to cut blasting rock slope, and alternatively measure c. For cut ripping rock slope, measure c-1 appeared to be effective in revegetation effect, and alternatively, b-1.When it comes to cut soil slope, measure c-2 was found to be effective, and b-2 to be a good alternative. And for embankment soil slope, measure b-3 appeared to be most efficient in revegetation effect and measure f as alternative.

• Journal of Ecology and Environment
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• 제29권5호
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• pp.445-452
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• 2006

The number of species and forest area has decreased as urbanization is progressed. The landscape degradation was examined by analyzing vegetation map, satellite image and characteristics of actual vegetation. The study was conducted in Mt. Baekja and its surroundings located on Gyeongsan city, southeastern Korea. As the result of landscape analysis, agricultural field was a characteristic attribute of the study area. Lowlands of this study area were occupied by agricultural field and various plantations. For 15 years from 1987 to 2002, forest area decreased from 2,072.9 ha to 1,853.2 ha, and shape index and fractal dimension of vegetation patches increased from 1.32 to 1.65 and from 1.05 to 1.09, respectively. Pinus densiflora Siebold & Zucco. community showed the highest species diversity, whereas Larix kaempferi (Lamb.) Carriere community showed the lowest species abundance. As forest management implications, monitoring of endangered plant species (Jeffersonia dubia (Maxim.) Benth. & Hook.f. ex Baker & S.Moore), and restoration of lowland forest from plantation to natural forest were discussed. Further, establishment of greenways utilizing existing streams, roadside, and public facilities were recommended.

• 생태와환경
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• 제54권2호
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• pp.142-150
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• 2021

To analyze the distribution characteristics of alien plants in various habitat types, 249 sites were selected from four administrative districts in the Gyeongsang region of Korea. The survey was conducted across nine different habitat types. A total of 115 species of alien plants were collected; comprising 23 families, 73 genera, 112 species, and 3 varieties. Species from the family Compositae were the most common at 33.0%. Raunkiaer's life forms had the highest occurrence rate with 70 species(60.9%) of therophytes(Th) followed by 30 species (26.1%) of hemicryptophytes (H) and 8 species (7.0%) of geophytes (G). The distributions of alien plant species per habitat type were: 81 species on the roadside; 80 species on vacant lots and artificial habitats; 67 species in streams; 53 species in grasslands; 47 species in cultivated lands; and 39 species on the coast. Since 2017, the number of alien plants has increased in Gyeongju-si, Cheongdo-gun, and Pohang-si, and decreased in Ulsan Metropolitan-si. In each region, 614 taxa were observed. The invasive alien species, Sicyos angulatus, Hypocaeris radicata, and Solanum carolinense, were observed for the first time and are expected to further increase the disturbance of the ecosystem.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 추계학술대회
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• pp.100-100
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• 2018

Zoysia japonica Steud.(Zj) is a typical warm-season Korean lawn grass, which is used in many places such as river banks, roadside and soccer fields in Korea. Recently, it has also been used in school yards and the Saemangeum reclaimed land to reduce water pollution. Although the cultivated area of turfgrass is steadily increasing worldwide, it grows fast requiring frequent mowing and is difficult to grow in shady areas and the cold region. Therefore this study aims searching for useful gene(s) to develop abiotic stress tolerant and dwarf zoysiagrass. We isolated Ycf4 gene based on the sequence from Oryza sativa Japonica through RT-PCR and RACE PCR. Ultimately, open reading frame (ORF) of ZjYcf4 was 558bp long, encoding a protein of 186 amino acid residues. NCBI blast results showed that the ZjYcf4 protein is evolutionarily closely related to Ycf4 protein from Zoysia macrantha and Setaria italica (100% and 98%, respectively). To determine whether ZjYcf4 was involved in environmental stress in wild-type zoysiagrass, expression patterns of the gene were analyzed by real-time PCR under salt, cold and dark conditions. They were analyzed after each stress treatment for 3 hours. In salt and cold stresses, the expression was higher compared to control (3-fold and 1.5-fold, respectively), although there was a 1.6-fold decrease in expression under dark stress treatment. As reported previously, we suggest that ZjYcf4 gene affects abiotic stress such as salt, cold and dark.

• 한국육종학회지
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• 제42권4호
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• pp.381-389
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• 2010

한국의 전역에 자생하는 달래를 대상으로 육종 및 재배의 기초 자료를 얻고자 자생환경과 자생특성을 조사하였다. 자생지의 광환경은 121개의 자생지 중에서 반음지가 66개의 54.6%, 음지가 42개의 34.7%, 그리고 양지가 13개의 10.7%의 순이었다. 자생하는 장소는 밭 주변이 55개의 45.4%, 사찰 주변이 34개의 28.1%, 산 주변이 22개의 18.2%, 하천변이 7개의 5.8%, 그리고 도로변이 3개의 2.5%의 순이었다. 자생지는 $33^{\circ}N{\sim}38^{\circ}N$, $126^{\circ}E\sim129^{\circ}E$ 범위의 모든 지역에 널리 분포하였다. 자생지의 지역적인 분포를 보면 충청북도와 경상북도에 많았고 전라북도와 전라남도에는 적었다. 자생양상은 개체와 개체 사이가 밀착하여 집단을 형성하였다. 생육은 자생지역에 따라 다소 차이가 있었으나 대체로 맹아기는 9월과 익년 3월이었으며, 월동 후 3월부터 4월까지 생장하였고 추대하는 개체는 없었다.

• 한국환경복원기술학회지
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• 제10권4호
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• pp.70-82
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• 2007

Aiming at nature's early restoring needs to select plant species harmonizing with surrounding environment that fits to restoring goal of ultimately aiming at woody plants dominant vegetation that protect and stabilize surface parts of bared slopes. And it is important to make it assimilated with surrounding natural vegetation by differentiating planning of seed mixtures. Natural Ecological Restoring Construction Methods (JSB Method) was developed to increase the effect of landscape change according to seasons not to simple hydro-seeding by reducing rate of foreign grasses while raising rate of wild flower using. It was considered that using wild flowers that bloom on each season solved the problems of slope landscapes that looks artificial and uninteresting. After researching environmental condition of the slopes, JSB Method has shown that, as of wet-type method, soil is relatively soft and the difference of thickness of plant base soil media affects on the difference of soil hardness. In case of soil hardness of 8.8~17mm, there's dangerousness of slope's collapsing, but it has shown that growth of plant was favorable. For the acidity of soil, most of them are in the type of neutralized soil of more than pH 6. And after analyzing the degree of woody plants dominance, it had shown that lower part was occupied with wild flowers and other herbaceous species like China pin, golden phesant mum, pitcher plant, and middle and upper part was occupied with woody plants like silk-tree, sumac forming multi-layer structure. It can be concluded that the restoration objects of the woody plant vegetation on the roadside slopes can be accomplished successfully by Natural Ecological Restoring Construction Method (JSB method).

• Journal of Applied Biological Chemistry
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• 제63권2호
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• pp.161-168
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• 2020

식물 종마다 잎에 미세먼지(PM)를 흡착하는 정도가 서로 다르며 잎을 통해 PM을 흡수할 수 있는 것으로 알려져 있다. PM에 포함된 중금속은 인체 및 식물에 영향을 미칠 수 있으며 입자 크기에 따라 미치는 영향이 다를 수 있다. 따라서 충북대학교 내 도로변에 위치한 회양목 (Buxus koreana), 주목 (Taxus cuspidate), 철쭉 (Rhododendron yedoense), 이팝나무 (Chionanthus retusa)와 같은 가로수 잎에 축적된 PM을 입자 크기(PM_>10 및 PM_2.5-10)에 따라 분획 및 정량화하였다. 잎에 축적된 크기 별 PM의 금속 농도는 유도 결합 플라스마 질량 분석법(ICP-MS)으로 분석하였다. 나무 잎 표면에 축적된 PM_>10의 질량은 6.11-32.7 ㎍/㎠, PM_2.5-10의 질량은 0-14.8 ㎍/㎠이었다. 잎 표면에 홈이 있고 털을 갖고 있는 철쭉이 작은 PM 입자를 잘 유지하고 있었으며 광택이 있는 잎 표면을 가진 주목과 회양목은 많은 PM을 축적하고 있었다. PM은 Al, Ca, Mg, Fe와 같은 지각 구성 원소와 Cu, Pb, Zn와 같은 중금속을 포함하고 있었다. 지각 구성 원소의 농도는 PM_>10 입자에서 더 높았고, 중금속 농도는 PM_2.5-10 입자에서 상대적으로 더 높았다. 잎에 흡수된 Mn, Cd, Cu, Ni, Pb, Zn과 PM_2.5-10의 중금속 농도는 유의한 상관관계를 보여 나무 잎을 통해 PM이 흡수될 수 있음을 확인하였다.

• 한국자원식물학회지
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• 제26권2호
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• pp.289-302
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• 2013

본 연구는 국내의 자연생태계에 확산되고 있는 외래 기생식물인 미국실새삼의 분포와 그에 따른 생육지의 유형을 구분하여 기주식물을 조사하고, 그에 따른 생태계 영향을 파악함으로써 미국실새삼의 확산 저감을 위한 관리 계획을 수립하는데 기초가 되는 자료를 제공하고자 하였다. 미국실새삼의 분포는 전국적으로 확산이 이루어지고 있으며 주요 생육지 유형은 경작지변(54.3%), 도로변 나지(41.3%), 인공초지(4.3%) 등 3가지로 구분되었다. 총 37과 95속 119종 10변종 1아종 등 130분류군의 기주식물이 확인되었으며, 목본식물이 4.6%를 차지하고 외래식물은 30분류군으로 전체 기주식물 중 23%로 나타났다. 기주식물의 생활형을 분석한 결과 일년생식물(Th)이 68분류군, 52.3%로 가장 높게 출현 하여 미국실새삼의 생육지가 교란이 많이 일어나는 지역임을 확인할 수 있었다. 기주식물 중 유용식물을 분석한 결과 총 90분류군으로 기주식물 중 69.2%를 차지하였으며, 식용자원 59(45.4%)분류군, 약용자원 54분류군(41.5%), 공업용과 관상용자원이 13분류군(10%), 초지자원 9분류군(6.9%)으로 확인되었다.