• 한국약용작물학회지
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• 제22권2호
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• pp.98-104
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• 2014

In the present study, we investigated the anti-inflammatory effects by Alopecurus aequalis Sobol on the lipopolysaccharide (LPS)-induced nitric oxide (NO) production by RAW 264.7 cell line. Consistent with these observations, DS reduced the LPS-induced expression of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) at the protein levels in a concentration-dependent manner. In addition, the release of tumor necrosis factor-${\alpha}$ (TNF-${\alpha}$) and interleukin-6 (IL-6) were also reduced by DS. Moreover, LPS increased expression phosphorylation of $I{\kappa}B{\alpha}$, but DS showed inhibitory effect by reducing LPS-inducible p-$I{\kappa}B{\alpha}$ expression level. These results suggest that the down regulation of iNOS, COX-2, TNF-${\alpha}$, and IL-6 expression by DS are achieved by the downregulation of NF-${\kappa}B$ activity, a transcription factor necessary for pro-inflammatory mediators, and that is also responsible for its anti-inflammatory effects.

• 농촌계획
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• 제13권3호
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• pp.23-32
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• 2007

In Korea, a regulation of visual impact evaluation on development plan in natural environment is provided at the Natural Environment Conservation Act, but it was difficult to obtained the effectiveness enough to conserve natural landscape. So, the visual impact review on development plan is introduced to the act, through the revision of the Natural Environment Conservation Act in 2005. The basic directions of visual impact review are preservation, restoration, view protection, and harmony. The items of review are as follows; (1) development alternations for the provided plan, (2) executive reduction plan of visual impacts including consideration of growth of plants, (3) deliberation process between persons or parties concerned, etc. For rapid settlement of visual impact review system, it needs that the validity, the reliability, and the objectivity should be confirmed through steady research about reasonable guidance of review.

• 인간식물환경학회지
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• 제22권3호
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• pp.241-253
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• 2019

This study presents the standards for desirable local transfer of public affairs by analyzing the perceptions of experts in the academia and research institutes, as well as public officials in the environmental sector in charge of environmental affairs. The results of this study tend to be partially consistent with the results of previous studies that there is a difference in perception among respondents depending on the affiliation of experts and public officials. Among the policy tasks, there was a statistically significant difference among the respondents in perception of responsible agent for carrying out sustainable land planning and management. Regarding general environmental affairs, there was a statistically significant difference among pubic officials in different affiliations in perception of responsible executive agent for natural environment, living environment, and resource circulation.

• Journal of Ecology and Environment
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• 제41권9호
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• pp.256-264
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• 2017

Background: The aim of this study was to clarify the relationship between the sexual reproduction and the resource allocation in a natural Polygonatum humile population grown in a temperate mixed forest gap. For this aim, the plant size, the node which flower was formed, the fruiting rate, and the dry weight of each organ were monitored from June 2014 to August 2015. Results: Firstly, in 3-13-leaf plants, plants with leaves ${\leq}8$ did not have flowers and in plants with over 9 leaves the flowering rate increased with the number of leaves. Among plants with the same number of leaves, the total leaf area and dry weight of flowering plants were larger than those of non-flowering plants. The minimum leaf area and dry weight of flowering plants were $100cm^2$ and 200 mg, respectively. Secondary, the flowers were formed at the 3rd~8th nodes, and the flowering rate was highest at the 5th node. Thirdly, cumulative values of leaf properties from the last leaf (the top leaf on a stem) to the same leaf rank were greater in a plant with a reproductive organ than in a plant without a reproductive organ. Fourthly, fruit set was 6.1% and faithful fruit was 2.6% of total flowers. Biomasses of new rhizomes produced per milligram dry weight of leaf were $0.397{\pm}190mg$ in plants that set fruit and $0.520{\pm}0.263mg$ in plants that did not, and the difference between the 2 plant groups was significant at the 0.1% level. Conclusions: P. humile showed that the 1st flower formed on the 3rd node from the shoot's base. And P. humile showed the minimum plant size needed in fruiting, and fruiting restricted the growth of new rhizomes. However, the fruiting rate was very low. Thus, it was thought that the low fruiting rate caused more energy to invest in the rhizomes, leading to a longer rhizome. A longer rhizome was thought to be more advantageous than a short one to avoid the shading.

• 한국산림과학회지
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• 제97권2호
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• pp.156-164
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• 2008

Recognizing the importance of the multi-purpose management of natural deciduous forest, this study was carried out to implement the partial cutting for stand regulation to examine agroforestry practice as well as other concurrent forest resource production, and to investigate the changes in stand characteristics and understory vegetation in a silvopasture practiced natural deciduous stand in the Research Forest of Kangwon National University, Korea. Three different partial cutting intensities (68.1%, 48.6%, and control) were performed in the unmanaged natural deciduous stand in order to improve the growing condition, especially light condition, for introducing some commercial herbaceous plants on the forest floor to establish agroforestry and/or silvopastoral system. Dominated by Quercus varibilis Blume (50.5%) and Quercus dentata Thum. ex Murray (42.6%), eight tree species were composed of the study forest, including poles of Pinus desiflora Siebold & Zucc and sapling of Pinus Koraiensis Siebold & Zucc. The total of 87 (13 tree species, 12 shrub species, 58 herbaceous species, and 4 woody climbers) vascular plant species were observed in study site after partial cutting treatments, while that of before partial cutting was 53 species (14 tree species, 8 shrubs species, 30 herbaceous species, and 1 woody climbers). The proportion of life form spectra in plot B was Mi (28.4%)-Na (23.0%)-Ge (17.5%)-Ch (10.8%)-He (9.5%)-MM (6.7%)-Th (4.1%). No statistically significant differences were observed in changes of life form spectra from before to after partial cutting treatment and among partial cutting gradients in this study. Partial cutting and scratching for forage sowing made plants invade easily on the forest floor, and light partial cutting (LPC) plot (500 stems/ha) had much higher number of undersory species than those of heavy partial cutting (HPC) plot (310 stems/ha) and control plot (1,270 stems/ha).

• Asian-Australasian Journal of Animal Sciences
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• 제13권7호
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• pp.929-934
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• 2000

Optimum stand density of alfalfa (Medicago sativa L.) varies with locations and climates. Stand density is one of the factors that determines herbage yield, forage quality and persistence of alfalfa. As establishment costs increase, the question arises whether present population densities are optimum for obtaining maximum herbage yield and forage quality. The objectives of this study were: 1) to determine the optimum plant density for highest herbage yield and forage quality for the dehydrated alfalfa industry under Edmontons climatic conditions in Alberta, Canada; 2) to compare herbage yield and forage quality of the cultivars 'Algonquin' and 'Vernal' grown at a range of stand densities. Alfalfa seedlings of both cultivars were either transplanted at spacings of 6, 10, 15 and 25 cm or direct seeded at the 4.5 cm plant spacings, providing population densities of 494, 278, 100, 45 and $16plants/m^2$. The experimental design was a randomized complete block with a split-plot arrangement having three replicates; the main plots consisted of two alfalfa cultivars Algonquin and Vernal, and the sub-plots were the five population densities. The cultivar Vernal had significantly higher annual yield than did the cultivar Algonquin. There was no significant effect of plant density on herbage yield. There was no difference in crude protein (CP) between the two cultivars. At the first cut, there was a significant quadratic effect of plant density on CP content and the greatest CP occurred at the 100 plants/m2 density. Crude protein was not affected by plant density at the second cut. Acid detergent fiber (ADF) and neutral detergent fiber (NDF) were not affected by plant density. The cultivar Algonquin usually had a lower ADF and NDF than cultivar Vernal. In conclusion, high population densities ($278plants/m^2$ or more) of alfalfa did not improve herbage yield and forage quality compared with low plant population densities ($100plants/m^2$ or less) of alfalfa.

• 한국자원식물학회지
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• 제19권4호
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• pp.459-470
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• 2006

본 연구는 충청북도 괴산군 연풍면 조령산 일대 분포하는 식물상을 체계적이고 객관적으로 분석하여 자연환경보전의 기초 자료 제공과 더불어 충청북도 내 분포하는 식물상의 데이터베이스화하는데 목적이 있다. 조사시기는 2004년 11월부터 2005년 9월까지 계절별로 조사를 수행하였고 조사경로는 A 경로(휴량림 입구${\sim}$신선봉), B 경로(신선봉${\sim}$마패봉), C 경로(조령 제3관문${\sim}$마패봉), D 경로(용성골${\sim}$깃대봉)로 구분하여 실시하였다. 관속식물상 조사결과, 85과 219속 299종 36변종 6품종 등 총 341분류군으로 관찰되었다. 산림청 지정 희귀 및 멸종위기식물은 백작약, 꼬리진달래, 태백제비꽃 등 3분류군이 조사되었다. 한국특산식물은 개비자나무, 호랑버들, 매화말발도리, 조팝나무, 털조록싸리, 산앵도나무, 참배암차즈기, 병꽃나무, 고려엉겅퀴 등 총 9분류군이 확인되었다. 자원식물상 조사결과, 관상용 식물자원은 171종(50.1%), 식용식물자원은 222종(65.1%), 약용식물자원은 237종(69.5%), 기타용 식물자원은 146종(42.8%)으로 나타났다.

• 한국환경과학회지
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• 제11권11호
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• pp.1149-1156
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• 2002

The ecological characteristics of Dolbae trees, a valuable genetic resource for native pyrus fruit trees, were investigated at four naturally inhabited areas on Mount Kaya, Gyeongsangnam-Do. Most Dolbae trees were found on the southwest side of an old hiking path to a mountain valley at altitudes of 610∼670 m. The surrounding flora consisted of 46 families, 69 genera, 75 species, and 10 varieties. The natural habitat of the Dolbae trees was basically a deciduous broad-leaved forest with a predominance of Quercus serrata and ligneous plants(xylophytes) from the Fagaceae and Betulaceae families. The habitat was also found to be in a second transition resulting from forest disturbance and exhibited a degree of diversity of 2.901-5.065, based on Shannon-Weiner's index. Examination of the Dolbae trees found in Mount Kaya revealed diameter breast heights(DBHs) ranging from 10 to 60 cm, including six old and large Dolbae trees with a DBH of 50∼60 cm, which will be particularly valuable as a genetic resource. Accordingly, the current results suggest that the study areas are a secondary forest in a typical mid-temperate zone resulting from forest damage about 10 years earlier.

• 한국환경과학회지
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• 제32권6호
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• pp.441-451
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• 2023

This study examines the changes in environmental resource perception and residential areas on Jeju Island. This study focuses on Jeju Island, which has prepared a legal framework for the total amount of environmental resources. The study identifies Jeju residents and non-provincial citizens, analyzes the differences between them, and suggests the future direction of the total amount system for environmental resources. This study aims to provide essential data necessary for successfully implementing the assigned environmental resources. This will contribute to sustainable growth and preserving valuable environmental resources in an era where environmental importance is increasing. The findings indicate that both Jeju residents and non-provincial citizens are satisfied with the current environmental resources on the island. However, when comparing past and current environmental resources, Jeju residents generally indicated lower satisfaction over time, whereas non-provincial citizens perceived an improvement over time. While overall satisfaction with the natural and local environment remains high, there is a notable increase in perception regarding the ecological value of plants, wildlife, wetlands, and Gotjawal areas compared to the past. These findings emphasize the importance of incorporating these high-priority components into the total environmental resource system for future consideration.

• 식물분류학회지
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• 제49권2호
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• pp.179-197
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• 2019

전라남도 고흥군에 위치하는 외나로도의 관속식물상을 조사하고 분포가 확인된 주요식물에 대해 논의하였다. 2015년 3월부터 2017년 10월까지 3년 동안 총 21회의 현지조사에서 확보된 표본에 근거하여 관속식물목록을 작성하였고, 국립생물자원관 표본관(KB)과 대전대 생물학과 표본실(TUT)에 수장하였다. 본 조사에서 생육이 확인된 관속식물은 122과 364속 538종 6아종 41변종 2품종의 총 587분류군이다. 멸종위기야생생물로는 혹난초, 지네발란, 대흥란, 석곡 4분류군을 확인하였다. 한반도고유종은 변산바람꽃, 해변싸리, 거제물봉선 등 14분류군이었고, 식물구계학적 특정식물로는 V등급 4분류군, IV등급 4분류군, III등급 47분류군, II등급 18분류군, I등급 64분류군으로 총 137분류군이 조사되었다. 적색식물목록종으로는 위급종(critically endangered) 꽃꿩의다리를 포함하여16분류군을 확인하였다. 귀화식물로는 가시상추, 물참새피 등 46분류군이 조사되었다.