• 상하수도학회지
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• 제29권3호
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• pp.319-323
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• 2015

This study investigated the effects of the light conditions on the productivity of scenedesmus dimorphus in the continuous mass cultivation system. To compare the algal productivity according to the light conditions, S. dimorphus was cultivated continuously under the wide range of light intensity(200-600 PPFD) and various light wavelength(white light and red-blue mixed light). After 100 days of cultivation under the different light intensity, the productivity of S. dimorphus increased as light intensity decreased. So, the productivity was maximized as 100 mg/L/d when light intensity was 200 PPFD. In case of light wavelength, the productivity of S. dimorphus was enhanced about 20% with the white light compared to that of the red-blue mixed light. Consequently, the optimal light conditions for the continuous mass cultivation of S. dimorphus were 200 PPFD as light intensity and white light as light wavelength.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.120-120
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• 2022

Agrivoltaic System (AVS) was introduced with the concept that it could generate electricity by using the extra light remain after crops use for photosynthesis in farm, which can earn additional income. However, crop yield was declined under the AVS condition due to the decrease in light energy. In the past, many researchers have been studied about crop states under shading conditions. However, the phenomenon of partial shading such as under the AVS is not well studied. In this study, to figure out the response of crop under the different light conditions, the electron transport rate (ETR) and non-photochemical quenching (NPQ) of rice was investigated using the chlorophyll fluorescence measurement. Also, physiological changes of crops under the shading conditions were investigated. The growth experiment under partial shading under AVS and overall shading which made of 35% shade cloth was conducted to understand the eco-physiological responses of rice to light in terms of the photosynthesis. Under the shading conditions, SPAD value and chlorophyll contents were higher, but the leaf thickness was lower than control. The overall shading condition show lower ETR than others during the growing season. In contrast, NPQ was higher than other treatments. This means the available light energy cannot contribute to photosynthesis under the shading condition.

• 한국초지조사료학회지
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• 제39권4호
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• pp.195-206
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• 2019

본 연구는 사료용 옥수수 재배현장에서 재배환경과 재배기술의 현장적용 차이에 따른 조사료 생산성의 변화 요인을 분석하기 위하여 2017부터 2018년까지 수행되었다. 우리나라 중부 및 남부지역에서 34개 사료용 옥수수 재배지의 평균 건물수량은 13,510kg/ha이였다. 재배현장에서 사료용 옥수수의 생산성은 재배환경과는 상관이 거의 없고 재배기술과 고도의 상관(p<0.01)이 있는 것으로 나타났다. 재배기술 중에서 파종기술은 조사료 생산성과 고도의 상관이 있었으나, 시비기술은 조사료 생산성과 상관이 거의 없었다. 이상의 연구결과는 사료용 옥수수의 조사료 생산성 향상을 위해서는 재배환경도 중요하지만 재배기술을 적기에 적용하는 것이 더 중요함을 암시하고 있다. 따라서 우리나라 지역별 사료용 옥수수의 생산성 예측기술의 정밀도를 높이기 위해서는 그 지역의 기후환경 및 토양환경은 물론 재배기술의 현장실천 정도를 충분히 고려하여야 할 것으로 사료된다.

• 생약학회지
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• 제22권2호
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• pp.134-141
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• 1991

In an effort to make it possible to cultivate Coptis japonica in Korea, the environmental and ecological conditions allowing the wild growth and distribution of Coptis sp. in Japan were investigated. The environmental conditions of the culture yard and the culture methods of C. japonica were also investigated. From these studies, it was concluded that the cultivation of C. japonica requires a well-drained sandy soil, $pH\;4.5{\sim}5.5$, which is facing North or Northwest. The area suitable for the cultivation of C. japonica should have rainfall of $1,000{\sim}1,500mm$ per year, be covered with snow for $30{\sim}60$ days in the winter, and be blocked $40{\sim}70%$, of the sun shine. These findings suggest that in korea the cultivation of C. japonica may be possible in the areas ranging from Sock-cho to Kang-neung, Mt. Odae, Mt. Taebaek and Mt. Sobaek where is chill and much moisturous in summer.

• 한국수산과학회지
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• 제43권6호
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• pp.687-692
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• 2010

The mass cultivation of Ecklonia cava Kjellman was studied as a potential biomass source for the extract industry in Korea. Experiments were conducted to investigate the optimal conditions for artificial seed production and mass cultivation of this species. Maximum growth and young thalli development in the nursery culture area occurred at 2 m depth, whereas maximum growth of thalli in the main culture area occurred at 1 m depth. Production of E. cava was between 2.6 and 3.6 kg wet wt. $m^{-1}$ after depth control and removal of fouling organism, etc. The relationship between optimal water depth for culture and underwater irradiance during the E. cava cultivation was calculated as: y = -0.718x + 8.042 ($r^2$=0.976). The growth rates achieved in this trial indicate that E. cava cultures could produce and supply sufficient biomass.

• 동아시아식생활학회지
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• 제11권3호
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• pp.219-224
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• 2001

This study was conducted to investigate the optimal conditions for the growth of soybean sprouts by ozone water watering. Optimal conditions for ozone water watering of soybean sprouts during cultivation at 2$0^{\circ}C$ were evaluated with ozone concentration(0.1~O.5 ppm) and watering frequency(1~9 times) by response surface methodology. The optimal conditions for growth of soybean sprouts were ozone concentrations of 0.20~0.32 ppm, ozone treatment frequency of 3.0~4.4 times. Germination rates, hypocotyl weights and hypocotyl lengths in the soybean sprouts cultivated under the optimal conditions increased by 13.3, 10.1 and 11.9%, respectively, whereas root weights decreased by 89.0%.

• 한국자원식물학회지
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• 제14권2호
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• pp.129-132
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• 2001

According to the research of the cultivation result on the spot farmers for 5 years in order to investigate its cultivation conditions and problems of Lycium chinetrse Mill, the development of the variety with early mature, pest tolerance, and high yielding is urgent and it is call for the development of rooted cutting cultivation by testing of bed soil, growth regulator and cutting times. The development of cultivation method with planting year, planting density, supplementary period and amounts of supplementary of Lycium chinense Mill planted in growing field are required and for the disease and the effective control of disease and insect pest resistance is needed by auxotrophic fertilizing and organic agricultural method, met by agricultural chemicals.

• 한국약용작물학회지
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• 제9권2호
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• pp.150-155
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• 2001

작약 비가림 재배시 생육 특성과 수량에 미치는 영향을 구명하기 위해 시험을 수행한 결과는 아래와 같다. 비가림 재배시 노지 재배에 비해 맹아기와 개화기가 각각 9일, 15일빨랐으며 경장, 경수 등도 더 크거나 많았다. 병발생은 녹병, 탄저병, 횐가루병, 뿌리썩음병은 비가림 재배가 노지 재배에 비해 현저히 감소 되었으나 점무늬병은 비슷하였다. 근장, 근수, 근경은 비가림 재배가 노지 재배에 비해 생육이 양호하였으며 뿌리 수량도 비가림 재배가 10a당 2,395kg으로서 노지 재배의 2,201kg, 1,892kg에 비해 27%, 9% 증수 되었다. 품질면에서 뿌리 색도는 비가림 재배가 노지 재배에 비해 더 양호하였으며 상품 수량도 향상되었다.

• Journal of Microbiology and Biotechnology
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• 제32권3호
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• pp.378-386
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• 2022

Scenedesmus obliquus ABC-009 is a microalgal strain that accumulates large amounts of lutein, particularly when subjected to growth-limiting conditions. Here, the performance of this strain was evaluated for the simultaneous production of lutein and biofuels under three different modes of cultivation - photoautotrophic mode using BG-11 medium with air or 2% CO₂ and heterotrophic mode using YM medium. While it was found that the highest fatty acid methyl ester (FAME) level and lutein content per biomass (%) were achieved in BG-11 medium with CO₂ and air, respectively, heterotrophic cultivation resulted in much higher biomass productivity. While the cell concentrations of the cultures grown under BG-11 and CO₂ were largely similar to those grown in YM medium, the disparity in the biomass yield was largely attributed to the larger cell volume in heterotrophically cultivated cells. Post-cultivation light treatment was found to further enhance the biomass productivity in all three cases and lutein content in heterotrophic conditions. Consequently, the maximum biomass (757.14 ± 20.20 mg/l/d), FAME (92.78 ± 0.08 mg/l/d), and lutein (1.006 ± 0.23 mg/l/d) productivities were obtained under heterotrophic cultivation. Next, large-scale lutein production using microalgae was demonstrated using a 1-ton open raceway pond cultivation system and a low-cost fertilizer (Eco-Sol). The overall biomass yields were similar in both media, while slightly higher lutein content was obtained using the fertilizer owing to the higher nitrogen content.

• 한국인터넷방송통신학회논문지
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• 제15권5호
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• pp.193-199
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• 2015

요즈음, 온도 및 습도, 조도 센서를 이용하여서, 식물 재배 환경 정보를 자동으로 수집하고 생장환경을 관리하는 지능형 온실 시스템이 많이 연구되고 있다. 본 논문에서는 조도, 온도 및 습도를 예측해서 인터넷 기반에서, 식물 재배의 최적 환경 조건을 추론하는 모의실험을 하였다. IOT 환경에서, 식물 재배 조건을 온도, 습도, 조도를 아두이노 센서에 실시간으로 온실 관리자에게 전송해서, 식물 재배에 필요한 최적의 온도, 습도 조건 값보다 크거나 적으면 자동으로 SMS 경고 문자를 실시간으로 전송해 주기 때문에, 급격한 기후 변화 (눈,비, 폭염)조건일 경우라도 최적의 화초 재배조건을 관리 할 수 있다. 본 논문에서는 퍼지논리와 WEKA TOOL을 이용하여서, 같은 온대 식물이라도, 그 지역에 필요한 최적의 온도, 습도, 조도(일사량) 수치를 산출하는 모의실험을 하였다.