• 한국조경학회지
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• 제51권4호
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• pp.76-89
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• 2023

도시농업의 기술 중 하나인 수경재배 농법은 공간의 물리적 제약이 다른 도시농업 활동에 비해 적고 재배환경을 어디든지 쉽게 구축할 수 있다는 장점이 있어 그 활용 가치가 높지만, 기존의 연구 대부분이 기술 개발에 초점 맞추어져 있어 도시민의 여가 문화적 가치를 내포하는 도시농업의 문화적 활용성 측면에서 연구가 부족하였다. 따라서, 본 연구는 수경재배를 활용한 도시농업 활동에서 학내 구성원이 인식하는 참여제약요인을 파악하고 도시농업 여가 향유의 관점에서 참여 의사결정에 영향을 미치는 변수 간 구조적 관계를 파악하였다. 근거이론과 선행연구 고찰을 통하여 수경재배 도시농업의 참여제약요인을 3가지 측면으로 나누고, 서울대학교 구성원을 대상으로 설문 조사를 수행한 후 R software를 활용하여 요인분석 및 구조모델에 대한 평가를 시행하였다. 그 결과로 첫째, 수경재배를 활용한 도시농업 활동에서의 참여제약요인은 크게 내재적 요인, 대인적 요인, 구조적 요인으로 나뉘었다. 둘째, 가설 모형 검증 결과로 대인적 제약이 참여자의 참여의지와 기대행동에 유의한 영향을 미치는 것으로 나타났다. 본 연구는 옥상이라는 도시공간에서 행해진 수경재배 도시농업에 대한 학내 구성원의 다원적 가치 인식을 파악하였으며, 연구 결과를 활용하여 도시공간이나 옥상에서 이루어지는 수경재배 도시농업 활동에 더 적극적 참여를 유도하는 전략에 근거를 제시할 수 있다.

• Environmental Engineering Research
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• 제17권1호
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• pp.3-8
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• 2012

A scaled-up bioconversion of fishmeal wastewater (FMW) into liquid fertilizer was performed five times in a $1m^3$ reactor in order to examine the feasibility of commercialization. The importance of aeration was marked. Analyses indicated that dissolved oxygen (DO) level was closely related to the value of oxidation-reduction potential (ORP) and it was crucial to achieve high-quality liquid fertilizer. When pure oxygen was supplied through four diffusers into the reactor, DO levels and ORP values were maintained over 1.2 mg/L and 0.2 mV, respectively all the time during 52 hr of bioconversion. The pH changed from 6.8 to 5.9. The average removal percentages of chemical oxygen demand ($COD_{Cr}$) and total nitrogen (TN) were 75.0% and 71.6%, respectively. Compared to the result acquired in a 5-L reactor, bioconversion of FMW into liquid fertilizer was achieved in a shorter time under the same removal percentages of $COD_{Cr}$ and TN. The 52-hr culture of inoculated FMW was phytotoxic-free and it possessed comparable fertilizing ability to a liquid fertilizer made from the fish waste in hydroponic culture with amino acid contents of 5.93 g/ 100 g sample. From all the above results, transferring lab-scale data to large-scale production appeared to be successful. As a result, the commercialization of a liquid fertilizer made from FMW was feasible.

• The Plant Pathology Journal
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• 제17권5호
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• pp.311-314
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• 2001

Phytophthora root rot of lettuce, which has not been reported in Korea before, occurred severely in liquid hydroponic culture. The disease occurred in all seasons and was most severe in summer from June to August, showing over 90% infection rate in some farms. A total of 51 isolates collected from various farms were all identified as Phytophthora drechsleri. The fungus showed strong pathogenicity to lettuce and Chinese cabbage, moderate pathogenicity to cucurbits and tomato, and weak pathogenicity to pepper. However, the fungus was not pathogenic to other leafy vegetables namely: chicory, kale, endive, garland chrysanthemum, spinach beet, and perilla. Among 10 species of Phytophtora inoculated to lettuce, only P. drechsleri and P. cryptogea were found pathogenic.

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2011년도 춘계학술발표회
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• pp.142-143
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• 2011

• 한국생물환경조절학회:학술대회논문집
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• 한국생물환경조절학회 1997년도 가을 심포지움 및 학술논문발표요지
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• pp.91-93
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• 1997

근래에 들어서 관상용 허브식물과 허브 가공용품에 대한 수요가 나날이 증가하고 있으나 아직까지 우리나라에서는 체계적인 연구가 미흡한 실정이다. 특히 영양번식이 효과적인 허브식물은 생장조절제 처리에 대한 보다 다양한 실험이 요구되고 있다. 따라서 본 실험에서는 삽목 재배시 IBA처리 효과를 조사하였고, 아울러 수경재배법확립을 위하여 질소원 처리농도 및 형태에 따른 생장율을 비교하였다. (중략)

• 한국작물학회지
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• 제47권4호
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• pp.323-327
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• 2002

Plant growth and the two components of respiration, growth and maintenance, were compared between low and high nitrogen applications in hydroponic culture on a high-yielding rice cultivar 'Takanari' (Oryza sativa L.). Grain yield decreased by high nitrogen application, and thus this cultivar has low adaptability to nitrogen. Growth efficiency (GE) and net assimilation rate (NAR) were lower in the high-nitrogen plot. The maintenance coefficient (m) and growth coefficient (g) of dark respiration were 0.0111 $d^{-1}$ and 0.196 in the low-nitrogen plot and 0.0166 $d^{-1}$ and 0.237 in the high-nitrogen plot, respectively. Thus, high nitrogen application increased both g and m. Calculated $R_m$ (maintenance respiration rate) was 70 and 90% of total respiration rate at heading, respectively. The significance of nitrogen adaptability and g was discussed.

• 한국농업기계학회:학술대회논문집
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• 한국농업기계학회 1996년도 International Conference on Agricultural Machinery Engineering Proceedings
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• pp.1117-1125
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• 1996

A low-cost and precise metering device, which is suitable to automatic mixing of nutrient-solution for hydroponic culture, was developed for small-scale growers. The metering accuracy of the metering device developed was compared with commercial metering pumps. The mixing performance through the control of EC and pH was also evaluated. The accuracy of the metering device in terms of the full -scale error was $\pm$0.3% , which was much better compared to $\pm$2.45% and $\pm$1.38% for the two types of commercial metering pumps. The mixing system of nutrient-solution with the metering device showed a satisfactory control performance with the accuracies of $\pm$0.05mS/cm and$\pm$0.2pH for EC and pH, respectively.

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2010년도 심포지엄 및 추계학술발표회
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• pp.509-510
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• 2010

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2010년도 심포지엄 및 추계학술발표회
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• pp.515-516
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• 2010

• Plant Resources
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• 제8권1호
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• pp.48-51
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• 2005

Optimmum cultivation period was determined for producing seed bulb of Korean native Allium wakegi Araki in vitro in hydroponic culture. The growth gradually increased during cultivation period. In general, plants grown for 5 months produced significantly the highest bulb number and bulb fresh weight per plant. Raising the cultivation period from 1 to 5 months remarkably increased seed bulb yield.