• 한국유기농업학회지
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• 제19권spc호
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• pp.222-224
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• 2011

The effects of seawater on growth of lettuce(Lactuca sativa L.), leaf perilla(Perilla frutescens var. japonica Hara), red pepper(Capsicum annuum L.) and cucumber(Cucumis sativus L.) seedlings were investigated in the glass greenhouse. These effects were studied on seedlings, and diluted seawater (1%, 5%, 10%, 20%, 50%, 100% v/v) was sprayed enough on leaves. The tested four vegetable crops have well grown up to 10% diluted seawater, but the tested vegetable crops were damaged from increasing salt levels. Of these, lettuce was provided salt-tolerant vegetable crop and red pepper was considered salt-sensitive vegetable crop. The salt tolerance of vegetable crops is different between crops and complicated because of additional detrimental effects caused by accumulated ions or specific ion toxicities in their leaves. These results show that agricultural use of seawater may be benefit crop cultivation in organic farming system as well as in conventional farming system.

• 한국유기농업학회지
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• 제8권1호
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• pp.111-129
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• 1999

In order to get some basic data to check the environmental sound function against soil and water pollution and the safe vegetable production by korean organic farming where an internationally recognized basic concepts of soil fertility management for organic farming is not practiced and only applying the organic fertilizer to maintain the soil fertility, the chemical characteristics of soils and $NO_{3}^{-}$ content of chinese cabbage and lettuce cultivated by the conventional farming, greenhouse cultivation and organic farming were investigated. The highest value of $NO_{3}^{-}$-N in 0~30cm subsoil among the three different farming systems was found in the subsoil of organic farming and it was 3.6 and 6.6 times higher than those of conventional farming in chinese cabbage and lettuce respectively. $P_2O_5$ accumulation in the rhizosphere by organic farming also showed the highest value. The accumulation of $NO_{3}^{-}$-N and $P_2O_5$ in organic farming soil were similar or even more higher to those of greenhouse cultivation. The $NO_{3}^{-}$ accumulation in the vegetable by organic farming reached 3224ppm for chinese cabbage and 2543ppm for lettuce, and it were 4.7 and 6.4 times higher than those by conventional farming. It was concluded that there is urgently necessary to introduce the main concepts of soil fertility management of the Basic Standard of IFOAM, EU regulation and FAO/WHO Codex Alimentarius on organic agriculture(draft) into korean organic agriculture for the operation of environmental sound system and the production of sate vegetable in terms of $NO_{3}^{-}$ content.

• The Journal of Asian Finance, Economics and Business
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• 제8권9호
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• pp.333-340
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• 2021

In Vietnam, the desire to consume organic vegetables is increasing as people become increasingly concerned about foods that contain several chemicals and toxins that are hazardous to their health. However, numerous subjective and objective factors continue to influence customers' purchase intention and behavior, indicating that this market has not yet reached its full potential. The study analyzes the impacts of trust, price, and convenience on consumers' consumption behavior and frequency of using organic vegetables in Northern Vietnam. We surveyed 312 consumers in the region. After classifying the data, 178 participants have used or regularly used organic vegetables selected for further study. Next, the author applied SmartPLS software with version 3.3 to test the hypotheses and analyze the effects of the observations. The result shows that three main factors affect customers' organic vegetable consumption behavior, especially perceived convenience. This study contributes to the development of comprehensive policy mechanisms and regulations on product traceability. Furthermore, market management authorities must have a strategy in place to inspect the product quality of organic vegetable store chains regularly to build customer trust and support the growth of organic vegetable production and supply chains in Vietnam's northern region.

• 한국유기농업학회지
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• 제19권spc호
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• pp.1-5
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• 2011

A new powdery mildew resistant squash (Cucurbita moschata Duch.) 'Miso' was bred from a cross between powdery mildew resistant true variety 'Sangol' and powdery mildew susceptible inbred line 'Seoulmadi' at National Institute of Horticultural & Herbal Science (NIHHS). The 'Miso' variety was vigorous and highly resistant to powdery mildew. It showed white green fruit color. The variety yielded 21.3MT/ha which is 52% more than control variety.

• 한국유기농업학회지
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• 제23권4호
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• pp.963-974
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• 2015

유기농 시설채소 재배지 토양의 물리적 특성조사는 전국 33개 농가 포장에서 2014년 8월부터 11월 사이에 조사하였다. 시설채소 재배지 선정은 엽채류인 상추(Lactuca sativa L.)와 잎들깨(Perilla frutescens var. japonica Hara), 과채류인 오이(Cucumis sativus L.), 딸기(Fragaria ananassa L.), 토마토(Lycopersicon spp.)를 경작하는 채소 종류별 5~8개 농가씩 선정하여 경도, 작토심 및 삼상 등 토양의 물리적 특성을 현장조사와 실험실내에서 분석하였다. 연구결과 작토심은 30~50 cm 범위로 평균 36 cm이었고, 재배되는 채소의 종류에 따라서 다소 차이가 있었다. 토양의 경도는 표토에서 $0.17{\pm}0.15{\sim}1.34{\pm}1.02$, 심토에서 $0.55{\pm}0.34{\sim}1.15{\pm}0.62$로 모두 매우 우수하였으며, 표토와 심토간에는 큰 차이가 없었으나 엽채류와 과채류 간에는 통계적으로 유의적인 차이를 나타내었다. 관입저항성은 뿌리 신장과 작물 수량을 결정짓는 토양의 물리적 특성중의 하나이다. 관입저항성은 엽채류 재배지에서 답압으로 인하여 다소 높게 나타났다. 토양의 삼상은 유기농 시설재배지 토양에서 동적이고, 전형적으로 변화되었다. 공극률은 $54.2{\pm}2.2{\sim}60.3{\pm}2.4%$ 범위로 높은 경향을 나타내었다. 이상의 결과를 요약해 보면 유기농 시설채소 재배지 토양은 토심은 깊어지고, 고상과 경도(흙의 단단함), 용적밀도(토양 단위 용적당 질량)는 낮아졌으며, 공극률(토양속 공간함유율)은 높아지는 등 유기농 시설재배지 토양의 물리성이 양호하였다.

• 한국토양비료학회지
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• 제49권6호
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• pp.760-767
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• 2016

Food waste (FW) has been recognized as a critical problem in Korea and many research was conducted to efficiently utilize or treat FW. Main purpose of this research was to evaluate a feasibility for producing fermented organic fertilizer with vegetable waste (VW). Three different organic materials (saw dust, coco peat, and waste mushroom media) were mixed with VW at the rate of 30, 40, 50% respectively. Total days of composting experiment were 35 days and each sub samples were collected at every 5 days from starting of composting. Result showed that inner temperature of composting was increased to $60{\pm}4^{\circ}C$ within 5~10 days depending on varied organic materials and mixing ratio. Among different treatment, the highest increase of inner temperature was observed when 30% of saw dust was mixed with VW. After finishing composting experiment, maturity of each compost was evaluated with solvita and germination test. Maturity index (MI) of each treatment was ranged between 5~7 indicating that manufactured fertilizer was curing or finished stage. Calculated germination index (GI) was at the range of 57.83~101.16 depending on organic materials and mixing ratio. Both MI and GI showed that manufactured fertilizer was met for fertilizer criteria while control (VW only) was not adequate for composting. Overall, VW can be utilized for making organic fertilizer mixing with saw dust, coco peat and more research should be conducted to make high quality of organic fertilizer with vegetable waste.

• 한국식품위생안전성학회지
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• 제19권2호
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• pp.60-65
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• 2004

식용이 간편한 즉석섭취용(ready-to-eat)샐러드 제품의 수요는 나날이 증가하고 있으나 국내 유통 샐러드의 미생물 오염수준은 기준 및 규격이 설정되어있지 않고 그 수준 또한 알려져 있지 않다. 따라서 소비가 집중되어 있는 대도시 지역을 중심으로 백화점, 대형할인점 또는 패밀리레스토랑 등에서 판매되는 즉석섭취용 샐러드 제품 120건을 대상으로 하여 coliform bacteria, E. coli, E. coli O157：H7, Staphylococcus aureus, Salmonella spp. Listeria monowtogenes 및 Bacillus cereus의 분리시험을 실시하고 일부 제품을 대상으로 일반세균수 및 세척효과를 조사하였다. 제품 120건 중 총 73건에서 coliform bacteria 등이 검출되어 60.8%의 검출율을 보였다. 5. coli가 17건, Staphylococcu aureu가 3건, Salmonella spp.가 1건에서 각각 검출되었고 기타 coliform bacteria는 59건에서 검출되었다. 샐러드는 양식방법에 따라 유기농샐러드와 비유기농샐러드로 나누었고, 종류는 야채로 구성된 야채샐러드와 튀긴 닭 등이 첨가된 혼합샐러드로 나누었으며 판매형태에 따라 완포장제품과 샐러드바 제품으로 나누었다. 양식방법 및 포장방법과 미생물오염과의 통계적 연관성은 없는 것으로 나타났다. 그러나 분리된 균주 수에 있어서는 야채샐러드와 혼합샐러드 간에 통계적으로 유의한 차를 보여 야채샐러드의 경우 좀 더 다양한 균종이 분리되는 것으로 나타났다 (p＜0.005). E. coli는 일반 재배 야채샐러드의 경우 90건 중 10건에서 분리되었고 유기농재배 야채샐러드 의 경우 30건 중 7건에서 분리되었다. 식중독 원인균은 비유기농 재배 야채샐러드 4건에서 Staphylococcus aureu가, 1건에서 Salmonella arixonia가 검출되었으나 유기농재배 야채에서는 검출되지 않았다. 널리 판매되는 일부 제품 4종을 5회에 걸쳐 검사한 결과 총 호기성 세균수는 평균 4.8$\pm$0.19 log$_{10}$ cfu/g으로 조사되었다. 같은 제품을 생리식염수와 야채용세척제를 이용해 3분간 침지 후 세척효과를 본 결과 생리식염수는 5회, 야채용세척제는 1회 세척 시 95.5%의 세척효과를 내는 것으로 나타났다.다.

• Journal of Microbiology and Biotechnology
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• 제9권2호
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• pp.191-195
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• 1999

Bioconversion of fumarate to succinate by Enterococcus sp. RKY1 was enhanced when Tween surfactant, organic solvent, and vegetable oil were added to the fermentation medium. The maximum amount of succinate produced was 80.4 g/l after a 24 h incubation when Tween 80 was added to the culture to a final concentration of 0.1 g/l. Triton X-l00 was observed to damage the enzymes and inhibit the formation of succinate. The addition of 10 ml/l acetone increased the production of succinate by 110%. Vegetable oils used were found to be effective for succinate production as well as for the cell growth. Similar productivity increases were obtained with corn oil and Tween 80 plus biotin with the total productivity being 3.6 g/l/h, and 3.5 g/l/h, respectively, which was approximately 25% greater than that of the control. Therefore, these results indicate that com oil can be considered the most appropriate agent for the production of succinate where succinic acid was primarily used in the production of food, medicine, and cosmetics.

• 한국유기농업학회:학술대회논문집
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• 한국유기농학회 2011년도 상반기 국제 심포지엄
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• pp.9-19
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• 2011

• 한국유기농업학회지
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• 제5권1호
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• pp.149-165
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• 1996

In order to get some basic datas on environmental friendly funtion against soil and water pollution and safe vegetable production by organic farming, chemical characteristics of soils cultivated by the conventional farming, greengouse cultivation and organic farming and acumulation of NO3--N in chinese cabbage and lettuce were analysed. The highest value of NO3--N in 0-30cm subsoil of organic farming was found among the 3 different farming systems, and it was 3.6 and 6.6 times higher than those of conventional farming in chinese cabbage and lettuce respectively. P2O5 also show high accumulation in the rhizosphere of organic farming compared to convnetional farming. The accumulation of NO3--N and P2O5 in the rhizosphere of organic farming were simial to those of greenhouse cultivation. The NO3- accumulation in chinese cabbage and lettuce by organic farming reach 3224ppm in chinese cabbage and 2543ppm in lettuce and it were 4.7 and 6.4 times higher than those of convnetional farming. It is urgently necessary to introduce the basic standard of IFOAM, EU and FAO/WHO Codex on organic agriculture into korean organic agriculture for operation of environmental friendly system and production of safe vegetable in terms of NO3-.