• 한국기후변화학회지
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• 제6권4호
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• pp.319-330
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• 2015

This study was carried out to predict the optimal growth site and estimate carbon stocks of Quercus acuta, evergreen broad-leaved trees in warm temperate zone according to climate change. The criterion for the optimal site prediction was created by quantification method with quantitative and qualitative data, collected from growth factors of stands and environmental factors of survey sites of 42 plots in Q. acuta by study relationship between growth of tree and site environmental factors. A program for the optimal site prediction was developed by using GIS engine tools. To prediction of the suitable growth site of Quercus acuta, developed program in this study applied to Wando in Jeollanam-do, distributing a various evergreen bread-leaved trees of warm temperate zone. In the results from analysis of the optimal site prediction on Q. acuta, the characteristics of the optimal site showed as follows; site environmental features of class I (the best site class for Q. acuta) was defined as 401 ~ 500 m of altitude, $21{\sim}25^{\circ}$ of slope with above hillside, residual of deposit convex of slope type with west of aspect. The area and carbon stocks of optimal site prediction by class for Q. acuta in classI showed 147.1 ha (2.5%), total 316.5 tC/ha, total $1,161tCO_2/ha/yr$ of class I, 2,703.5 ha (46.3%), total 5,817.4 tC/ha, total $21,331tCO_2/ha/yr$ of class II, 2,845.5 ha (48.6%), total 6,123.0 tC/ha, total $2,845.5tCO_2/ha/yr$ of class III and 153.7 ha (2.6%), total 330.7 tC/ha, total $1,213.7tCO_2/ha/yr$ of class IV.

• 농업생명과학연구
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• 제46권3호
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• pp.47-58
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• 2012

본 연구는 기후변화에 따른 난대상록수종인 황칠나무의 적지예측모델을 개발하기 위하여 수행하였다. 생장 및 입지환경 인자들간의 관계 구명을 통하여 양적 질적 자료 분석이 가능한 수량화 분석 방법에 의하여 황칠나무의 적지예측 평가기준을 도출하였다. 적지예측 프로그램은 ESRI, ArcView GIS 프로그램을 이용하여 개발하였다. 개발된 프로그램은 적지예측의 정확성 검토를 위하여 다양한 난대 상록활엽수가 분포하고 있는 전남 완도 지역에 적용하였다. 황칠나무의 적지예측 분석 결과, 최적지 표고 401~500m, 경사도 $15^{\circ}$ 이하, 국소지형은 산복 계곡부위, 퇴적양식 붕행토, 방위가 남쪽인 요철사면으로 나타났다. 완도지역의 황칠나무 최적지 등급별 맵핑 면적은 I 등급 1,487.2ha(25.4%), II 등급 1,020.3ha (17.4%), III 등급 2,231.8ha(38.2%), IV 등급 1,110.5ha(19.0%)로 나타났다.

• 한국물환경학회지
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• 제29권2호
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• pp.155-164
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• 2013

To confirm the relationship between climate change and Stephanodiscus in Mulgeum station of Nakdong River, Korea, this study was conducted. The temperature in crease by climate change was observed in the study site, where the temperature was gradually increased in most seasons, except for summer season. The mass proliferation of Stephanodiscus constantly appeared in every year, especially between November and March, and when Stephanodiscus abundance was above 90% in phytoplankton biomass. Among this period, phytoplankton biomass was high related with water temperature ($r^2$=0.249, P<0.01) than nutrient factors such as nitrogen and phosphorus in the study site. Finally, temperature by climate change can be regarded as the affecting factor for chl. a variation, because temperature was strongly related with water temperature ($r^2$=0.748, P<0.01). From 1997 to 2010, the annual maximum phytoplankton biomass was recorded in the range of temperature from $4.8^{\circ}C$ to $8.4^{\circ}C$, and the range was regarded as the temperature condition for the optimal growth of Stephanodiscus in the study site. On the optimal growth temperature, the trend of monthly average temperature corresponded to the trend of chl. a variation from November to March. In future, the increase of temperature by climate change can prolong Stephanodiscus blooming period in winter and spring seasons.

• 한국산림과학회지
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• 제99권3호
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• pp.359-367
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• 2010

본 연구에서는 소나무 용기묘(1-0묘)를 대상으로 계절별 식재시기 및 조림지 하층식생 조건에 따른 생존율과 생장 특성을 조사하여 용기묘 조림과정에서 보다 유리한 적정 식재시기를 구명하고자 하였다. 또4한 용기묘의 식재기간 확대 가능성을 검토하는데 목적이 있다. 식재시기는 봄, 여름, 가을의 세 처리를 하였으며, 시험지는 하층식생이 무성한 지역(A)과 그렇지 않은 지역(B)으로 나누어 처리하였다. 소나무 용기묘의 생존율은 모든 시험지에서 여름 식재가 가장 우수한 것으로 나타났다. 소나무 용기묘의 근원경과 묘고 생장은 여름 식재가 가장 우수한 값을 보였으며, 식재 후 초기에는 생장이 불량했지만 시간이 지날수록 생장률이 점점 높아졌다. 대부분의 식재시기 처리에서 B 지역이 A 지역보다 생장률이 우수한 것으로 나타났다. 물질생산량에 있어서도 세 시험지 모두 여름 식재가 가장 높았으며, 하층식생이 발달하지 않은 B 지역이 가장 높았다. 이 연구를 통하여 소나무 용기묘는 여름 조림이 가능하여 식재기간을 기존의 봄과 가을에서 여름까지 확대시킬 수 있으며, 높은 생존율과 생장을 위한 하층식생 관리의 중요성을 보여주고 있다.

• 한국산림과학회지
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• 제88권1호
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• pp.47-54
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• 1999

지위지수(地位指數) 12등급인 곰솔임분에 대한 최적(最適)의 직경(直徑) 및 수고생장함수(樹高生長函數)를 linear transformation(1), linear transformation(2) 등 2개의 선형식(線型式)과 exponential, Gompertz, Chapman-Richards, Weibull 등 4개의 비선형식(非線型式)에 의하여 도출하였다. 이들 함수에 의하여 추정된 직경 및 수고생장과 실측치인 직경 및 수고생장간의 상호관계를 분석하였다. 곰솔임분의 임령에 따른 직경과 수고생장을 추정한 결과는 선형식보다 비선형식의 적합성이 높게 나타났으며, 직경생장에는 Gompertz식, 그리고 수고생장에는 Chapman-Richards식의 적합성이 높게 나타났으나, 이들 비선형식간의 큰 차이는 없는 것으로 나타났다. 따라서 앞으로 이들 비선형식을 적용하여 현실임분(現實林分)의 직경과 수고생장을 추정하여야 할 것으로 사료된다.

• 아시안잔디학회지
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• 제19권2호
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• pp.95-102
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• 2005

USGA green specification is currently accepted in construction method of Korea. This study was carried out to find the factors influencing growth of turfgrass associated with soil physical properties of soil root-zone on golf green constructed with USGA method. Three putting greens in poor turfgrass and one in good turfgrass condition were selected for investigation on one golf course site at mid-South Korean peninsula. Soil hardness, moisture content, root length, and turf density were measured on-site greens, and soil physical properties and soil chemical properties also analyzed in laboratory. As a result of on-site surveys and soil physical tests in laboratory, soil physical properties were most important factors which influenced on turfgrass growth at tested greens. The results of soil particle analysis on green No. 2, in good turf condition, matched USGA sand particle recommendations. But those greens such as Nos. 1, 11 and 16, in poor putting greens, showed high soil compaction and improper soil particle distribution. Those factors created low leaf density, poor root depth, and higher moisture content compared with lower part of topsoil. Such phenomena caused inadequate turfgrass growth with soil hardening associated with poor drainage. Therefore, declines of soil physical properties associated with improper particle distribution caused a major factor influencing on turfgrass growth in golf green. Adequate test of soil particle analysis by USGA specification and proper construction method followed by adequate turf maintenance should be performed to obtain optimal turf quality on putting green.

• Journal of Ecology and Environment
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• 제40권1호
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• pp.75-83
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• 2016

Background: In order to evaluate the effect of pH, known as a critical factor for shaping the biogeographical microbial patterns in the studies by others, on the bacterial diversity, we selected two sites in a similar geographical location (site 1; north latitude 35.3, longitude 127.8, site 2; north latitude 35.2, longitude 129.2) and compared their soil bacterial diversity between them. The mountain soil at site 1 (Jiri National Park) represented naturally acidic but almost pollution free (pH 5.2) and that at site 2 was neutral but exposed to the pollutants due to the suburban location of a big city (pH 7.7). Methods: Metagenomic DNAs from soil bacteria were extracted and amplified by PCR with 27F/518R primers and pyrosequenced using Roche 454 GS FLX Titanium. Results: Bacterial phyla retrieved from the soil at site 1 were more diverse than those at site 2, and their bacterial compositions were quite different: Almost half of the phyla at site 1 were Proteobacteria (49 %), and the remaining phyla were attributed to 10 other phyla. By contrast, in the soil at site 2, four main phyla (Actinobacteria, Bacteroidetes, Proteobacteria, and Cyanobacteria) composed 94 %; the remainder was attributed to two other phyla. Furthermore, when bacterial composition was examined on the order level, only two Burkholderiales and Rhizobiales were found at both sites. So depending on pH, the bacterial community in soil at site 1 differed from that at site 2, and although the acidic soil of site 1 represented a non-optimal pH for bacterial growth, the bacterial diversity, evenness, and richness at this site were higher than those found in the neutral pH soil at site 2. Conclusions: These results and the indices regarding diversity, richness, and evenness examined in this study indicate that pH alone might not play a main role for bacterial diversity in soil.

• Journal of Periodontal and Implant Science
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• 제26권4호
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• pp.873-887
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• 1996

Platelet-derived growth factor(PDGF) is one of the polypeptide growth fators. PDGF has been reported as a biological mediator which regulates activities of wound healing process including the cell proliferation, migration and metabolism. Recent studies indicated that demineralized root surface as the primary site for growth factor application has advantages over other application method, especially due to binding capacity of growth factor for exposed matrix component of deminera1ized dentin surface. The purpose of this study is to evaluate optimal application time of PDGF-BB on proliferation of human gingival fibroblasts using deminera1ized dentin surface as primary application site. Human gingival fibroblasts and dentin slabs were prepared from the first premolar tooth extracted for the orthodontic treatment, cells were cultured in DMEM/I0% FBS at the $37^{\circ}C$, 5% CO2 incubator. All of the dentin slabs were preconditioned with Tetracycline HCI(100mg/ml) solution and rinsed in PBS. In the cell proliferation experiment, experimental group was immersed in DMEM containing 10% FBS, 50ng/rnl PDGF-BB during different time(30sec, 1, 2, 4, 8 minutes) and dried. Cells at concentration of $1{\times}10^5$cells/ml were seeded in each culture well which contained dentin slabs and incubated for 6 hours. Then, all of the dentin slabs were moved into new 24 well culture dish and incubated for 24, 48, 72 hours. The cell counting was done by hemocytometer with inverted phase contrast microscope after trypsinization. The results were as follows : The application of PDGF-BB for 1, 2 min slightly increased the number of gingival fibroblasts, and the application of PDGF-BB for 4, 8 min prominently increased the number of gingival fibroblasts. The application of PDGF-BB for 4 min showed maximum proliferation rate of gingival fibroblasts at 24, 48, 72 hours, and the application of PDGF-BB for 8 min showed less proliferation rate of gingival fibroblasts compared to the application of PDGF-BB for 4 min at 24, 48, 72 hours. In conclusion, the application of PDGF-BB for 4 min appeared to be optimal to obtain maximum proliferation of gingival fibroblasts using demineralized dentin surface as primary applicaton site of PDGF-BB.

• 한국농림기상학회지
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• 제17권2호
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• pp.126-135
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• 2015

본 연구는 전라북도 남원시의 맞춤형 조림지도인 적지적수도를 제작하기 위해 수행하였다. 이를 위해 남원시에 분포하는 주요 수종별 지위지수 추정식을 개발하고, 수종별로 적지에 적합한 입지조건을 반영한 생육범위를 고려하여 각 수종의 적지분포를 공간적으로 평가하였다. 남원시에 분포하는 주요 8개 수종별 지위지수 추정식은 각각 4-5개의 환경인자 조합이 관여하는 것으로 분석되었으며, 전체 27개의 환경인자 중에서 15개가 수종별 지위지수 추정에 사용되었다. 특히 사면위치($X_7$)와 경사형태($X_8$), B층 건습도($X_{11}$), 연최저 기온($X_{15}$), 온량지수($X_{16}$) 비생장기간 5개월 동안의 총강수량($X_{23}$), 월평균 상대습도($X_{24}$), 그리고 생장기간 초기 3개월 동안의 월평균 상대습도($X_{25}$)가 수종별 지위지수 추정식에 많이 포함되는 것으로 판명되었다. 이상과 같은 방법으로 남원시의 적지적수도를 제작한 후, 적합성 검증을 위해 현지 확인 조사를 수행하였다. 현지 확인 결과 본 연구에서 제작한 적지적수도는 사용 가능한 자료의 한계에도 불구하고 수종별 적지분포를 비교적 무난하게 표현하고 있는 것으로 평가되었다. 하지만 부적지로 평가된 일부 지역의 경우 수정 및 보완이 필요한 것으로 나타났다.

• 한국구조물진단유지관리공학회 논문집
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• 제19권1호
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• pp.109-119
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• 2015

최근 수십년간의 산업발달 및 인구증가에 따라 산업폐수 및 각종 비점오염원의 유입으로 수질오염이 심각한 실정이다. 이에 대해 국내 및 국외에서 이에 대한 연구가 활발히 진행되고 있다. 본 연구에서는 유기물질의 분해효과가 있는 유용미생물과 포러스콘크리트를 이용하여 하천 현장에 설치하여 구조적 성능평가와 장기간 수질정화능력을 평가하였다. 구조적 성능평가 결과, 시험체의 공극률은 15%가 적절하다고 판단되며, 또한 수질정화성능 검토 결과 각항목에 대한 제거율은 SS 34.1%, BOD 14.6%, COD 34.9%, T-N 11.4%, T-P 12.6%를 나타냈다. 따라서 유용미생물을 이용한 포러스콘크리트의 현장적용시 수질을 정화시키는데 효과적이라고 판단된다.