• 한국응용곤충학회:학술대회논문집
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• 한국응용곤충학회 2000년도 추계 학술발표회
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• pp.50-50
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• 2000

• 한국습지학회지
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• 제19권4호
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• pp.533-541
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• 2017

농업, 농촌경관은 다양한 생태계서비스 기능이 있지만 시설원예단지 개발은 환경보전에 대한 고려사항이 없어 단지를 조성 시 필요한 생태계서비스 기능 우선순위 분석을 실시하였다. 시설원예단지의 친환경적 조성을 위한 생태계서비스 기능 및 가중치 산정 방법은 총 3단계에 걸쳐서 진행되었다. 1차 조사결과 17개 기능을 개선방안으로 선정 하였고, 2차 조사에서 5개 기능을 제외 한 12개 기능이 선정되었다. 최종적으로 1. 수질정화 대책, 2. 지하수함양 방안, 3. 지표수저장 공간, 4. 홍수조절 대책, 5. 식생다양성 공간, 6. 탄소배출 저감 방안, 7. 수서곤충 서식 공간, 8. 양서파충류 서식 공간, 9. 경관 및 폐기물 대책, 10. 조류 서식 공간, 11. 열섬완화 방안, 12. 체험/생태교육 방안 순으로 고려할 것을 제안하였다. 기능 향상방법으로 수질정화 대책을 위해 수처리 시설의 구조, 유량, 용량, 유속, 배치, 형태 등 공학적 세밀한 접근과 계획을 제안하고 수질정화 식물인 벼, 부들, 줄, 부레옥잠, 물상추 등의 투입을 고려할 것을 제시했으며, 지하수 함양 대책을 위해 개발면적의 7-10%를 저류지 투입으로 제안하였다. 지표수 저장 공간과 홍수조절 대책을 위해 우리나라 실정에 맞는 저류지 및 저장시설 구조 개발을 제시했으며, 탄소배출 저감과 열섬완화 방안을 위한 녹지공간을 확보를 제안하였다. 생물다양성관 관련된 식생다양성, 수서곤충, 양서파충류 서식을 위한 서식처와 양액배출 관리를 제안하고 경관개선을 위한 녹지확보, 습지조성, 체험교육을 위한 시설투입을 거론하였다. 연구결과는 시설원예단지의 개선방안으로 활용하고 새로운 단지 개발에 있어 정책결정 자료로 활용 할 것을 제안했으며, 이러한 연구를 지속시켜 국가 생물다양성 및 국토환경보전, 지속가능한 농업에 이바지하길 기대하였다.

• 농업과학연구
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• 제33권1호
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• pp.85-95
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• 2006

A model experiment has been performed to get the heat transfer coefficient on the soil surface in the closed ecosystem. The heat flux on the soil surface was measured and the heat transfer coefficient was derived in the following two cases with 5-stepped control of inside air current speed. One case was that heat flowed from air to soil and the other case was that heat flowed from soil to air. Three dimensional CFD model has been set to simulate thermal environment in the closed ecosystem including soil layers. The standard $k-{\varepsilon}$ model of the CFD program was chosen for turbulence model and heating wire buried in the soil layers was set as heat source option to simulate the case when the temperature of soil surface was higher than that of inside air in the closed ecosystem. Between one case that heat flowed from air to soil and the other case that heat flowed from soil to air, there were big differences in the temperature distribution of soil layers and the heat transfer coefficient of the soil surface. The increasing rate of heat transfer coefficient on each case according to the increase of inside air current speed was similar to each other and it respectively increased linearly. But the heat transfer coefficient on the case that heat flowed from soil to air was much bigger than that of the other case. The model was validated by comparing simulated values of CFD model with measured values of the model experiment. Simulated and measured temperature of inside air and soil layers, and heat transfer coefficient of the soil surface were well accorded and the range of corrected $R^2$ was 0.664 to 0.875. The developed CFD model was well simulated in parts of the temperature of inside air and soil layers, the distribution of the inside air current speed, and heat transfer coefficient of the soil surface were able to be quantitatively analyzed by using this model. Therefore, the model would be applied and used for analysis of heat transfer coefficient between air and surface in various agricultural facilities.

• 디지털융복합연구
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• 제20권2호
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• pp.225-239
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• 2022

본 연구는 농업경영체 종사자를 대상으로 재정지원 활용을 조절변수로 하여 디지털농업화 요인이 기업성과에 미치는 영향을 연구하였다. 디지털농업화 요인을 디지털기술혁신지향성, 생태계건강성, 운용혁신지향성 및 기업가정신 지향성으로 구분하고 기업성과를 종속변수로 설정하였다. 전국에 소재한 농업경영체 종사자들을 대상으로 수집한 설문지 212부를 실증분석에 사용하였다. SPSS v22.0과 프로세스매크로 v3.4를 활용한 분석결과는 첫째, 디지털기술혁신지향성, 운용혁신지향성 및 기업가정신지향성은 기업성과에 유의한 영향을 미치고 생태계건강성이 기업성과에 미치는 영향은 유의하지 않는 것으로 나타났다. 둘째, 재정지원 활용은 디지털기술혁신지향성과 기업성과, 기업가정신지향성과 기업성과 간의 관계를 유의하게 조절하는 것으로 나타났다. 반면에 운용혁신지향성과 기업성과, 생태계건강성과 기업성과 간의 관계를 유의하게 조절하지 않는 것으로 나타났다. 또한 후속 연구로는 새로운 매개변수 발굴을 통한 매개모형 연구와 조건부과정 모형을 통한 조절된 매개분석 연구가 필요할 것으로 보인다.

• 농업과학연구
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• 제50권2호
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• pp.257-270
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• 2023

논(paddy) 환경은 습지로 분류되며 담수환경에서 매우 많은 비율을 차지하고 있다. 또한 많은 수서곤충류 및 양서파충류 유생의 서식지 및 산란 장소로써 생태학적으로 매우 중요하다. 하지만 기후변화 및 무분별한 농약 살포 등으로 인해 논 생태계는 지속적으로 위협받고 있다. 따라서 향후 훼손된 논 생태계를 복원하기 위해서는 복원 기준이 될 수 있는 논 생태계 서식 생물들의 정보가 필요하다. 환경유전자 metabarcoding 분석법은 성체 생활시기가 다르거나 성충으로 우화하여 대상 생태계에서 더 이상 발견할 수 없는 분류군까지 존재 여부를 간접적으로 파악할 수 있기 때문에 논 생태계에 서식하는 많은 생물들의 정보를 축적하는데 매우 효과적이다. 본 연구에서도 4종의 개구리와 9종의 수서곤충 유전자가 발견되었으며, 일부 분류군은 현장에서 개체가 직접 발견되었다. 많은 수의 분류군이 DNA 탐색에서만 발견되었으며, 전통적인 조사방법은 매우 제한적인 분류군만을 확인할 수 있었다. 이러한 eDNA 기반의 논 생물탐색은 강력한 분석 해상도 때문에 농업 생태계 생물다양성 조사에서 활용가치가 매우 높을 것으로 판단된다.

• 한국환경과학회지
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• 제29권4호
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• pp.325-337
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• 2020

The purpose of this study was to analyze the soil environment of urban neighborhood parks and to use them as basic data for evaluating the ecological functions of urban parks such as groundwater regeneration, flood control, microclimate regulation, adsorption and purification. The landscape design criteria were generally evaluated as advanced, and further monitoring and studies are needed to evaluate the various ecological functions. It is also necessary to improve the phosphoric acid and nitrogen contents, which tended to be low. In addition, continuous monitoring is needed to assess the proper soil environment according to the biological species, and to evaluate the ecological functions. The results of this study can be used to evaluate the groundwater recharge of urban parks. In particular, when the land of the neighboring park is used for various purposes, the level of access of the user may be increased. Therefore, factors that may adversely affect the user's health, such as heavy metals and organic matters, should be selected and selected as management criteria. In addition, follow-up studies considering fertilization standards suitable for trees and growth of introduced vegetation, etc. are needed urgently to improve the soil environment.

• Journal of Microbiology and Biotechnology
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• 제14권4호
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• pp.885-890
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• 2004

A survey for vesicular-arbuscular mycorrhizae (VAM) occurrence was undertaken in three endangered vegetation sites in the area of Kudankulam atomic power station. Fifteen VAM fungal species were isolated from the root-zone soils of fourteen different plant species. There was a significant correlation observed between the number of spores and of percentage root colonization as exemplified by Phyllanthus niruri and Paspalum vaginatum (450, 95%; 60, 25%). Although VAM species are not known to be strictly site specific, the fact that Acaulospora elegans was observed only in site 1, Glomus pulvinatum in site 2 only, and Gl. intraradices in site 3 only, showed site-specificity in this study. To confirm the infection efficiency, two host plant species in the sites, P. niruri and Eclipta alba, were selected and inoculated in field with three selected VAM fungal spores. Gl. fasciculatum was found to be the most efficient VAM species in percentage root colonization, number of VAM spores, and dry matter content. When the nutrients in roots of P. niruri and E. alba were analyzed, there was higher uptake of K (4.2 and 3.4 times, respectively) and Ca (5.3 and 4.9 times, respectively), the analogues for $^{137}Cs$ and $^{90}Sr$, respectively. From the results, it might be concluded that VAM association helps the plants survive in a disturbed ecosystem and enhances uptake and cycling of radionuclides from the ecosystem.

• 한국농공학회논문집
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• 제49권4호
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• pp.35-41
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• 2007

The most agricultural concrete structures for the irrigation and drainage are exposed to the underwater condition at the irrigation period and they take the influence on very severe cold in the winter. Therefore, it is impossible to use repair materials used to the general concrete structures. The research need the development of the repair material for a performance enhance of the agricultural underwater concrete structures. This research evaluated the mechanical and durability performance of the latex modified repair mortar for underwater concrete structures which peformed the repair in the underwater according to the characteristic of the agricultural concrete structure. The latex modified repair mortar is a material that minimize the effect of the ecosystem, environment and the segregation. In this research, the construction condition of the latex modified repair mortar for agricultural concrete structures was considered and the test specimens made in the underwater condition. Test results was then compared with target performance and commercial repair mortar. Experimental test results indicated that the mechanical and durability performance of latex modified repair mortar for agricultural underwater concrete structure satisfied all target performance. Also, the latex modified repair mortar resulted in better repair performance than the commercial repair mortar.

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2016년도 추계 학술발표논문집
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• pp.41-43
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• 2016

• 한국농림기상학회지
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• 제4권4호
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• pp.237-247
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• 2002

Air pollution by acid pollutants is problematic in the whole world. Water acidification has already been deteriorating the forest ecosystem. This study was conducted to analyze the acidity and chemical composition of the open precipitation and throughfall at forests with various geographic locations in Korea. The results of this study are as follows; The open precipitation pH was lowest in Seochun. The throughfall pH showed some buffering capacity in only Quercus mongolica stands. In Pinus rigida(Shingal and Seochun) stands, there was little difference from the open precipitation. Chemical composition of the open precipitation for each sampling site showed that $Ca^{2+}$, N $H_{4}$$^{+}$ and S $O_{4}$$^{2-}$ concentrations had higher value than other ions, and except these ions, the small quantity of ions showed different properties to each site. Changes of ion concentrations in the throughfall showed a tendency to increase. ion concentrations of the throughfall increased with washout and nutrient leaching from the trees. In conclusion, the influence was extended to the pure zone, and the frequency of acid rain is increasing. But, if the deposition of pollutants exceeds the capacity of purification, it would damage forest ecosystem. Further investigations are necessary to identify tolerant tree species to acid pollutants.nts.