• 한국유기농업학회지
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• 제24권3호
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• pp.355-368
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• 2016

There are growing interests in environmental friendly cultivation for the matter of health concern. This study analyzes an economic efficiency of strawberry and tomato farming by considering the role of environmentally friendly cultivation. The Database of Rural Development Administration is used for strawberry and tomato farming households. We adopt a Bayesian stochastic frontier model to resolve a small sample property of the data. Empirical finding is that environmentally friendly cultivation improves the revenue of farming but the effect on net profit is not conclusive which calls for future research.

• 농업과학연구
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• 제35권1호
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• pp.53-67
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• 2008

The principle goal of environmentally-friendly agriculture is to maintain and conserve water and agriculture environment including drinking water resources by properly using agricultural materials such as agricultural chemicals, chemical fertilizers, and other agricultural materials according to act 19 of foster law of environmentally-friendly agriculture. To achieve these goals, we have to establish Integrated Nutrient Management(INM) and Integrated Pesticide Management(IPM) which are most important core technologies for environmentally-friendly rice cultivation. However, there are lack of criteria and technology for evaluation category according to soil management and its soil classes to practice an environmentally-friendly agriculture. Therefore, we should eatablish the standards to produce the safe agricultural products based on the soil physical and chemical characteristics which are basic properties of soil to accomplish the principle aims of environmentally-friendly agriculture.

• 한국육종학회지
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• 제40권3호
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• pp.258-262
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• 2008

본 시험은 2006년 고령지농업연구소에서 육성한 '하령' 감자를 실제 농가에서 재배함으로써 다양한 병원균에 대한 포장저항성을 평가하여 친환경 재배 가능성을 검토하기 위하여 수행되었다. 품종별 평균 AUDPC는 '수미' 품종이 1377.7, '하령' 품종이 590.3으로서 '수미' 품종보다 '하령' 품종이 매우 강한 포장저항성을 나타내었으나, 시험처리 간에는 뚜렷한 경향을 나타내지 않았다. 수량은 모든 처리구에서 '하령' 품종이 많았으며, 단위면적(10a) 당 평균 수량은 '하령' 품종이 2,870 kg, '수미' 품종이 2,301 kg으로 '하령' 품종이 25% 증수를 보였다. 두 품종의 평균 건물률은 '수미' 품종이 16.1%, '하령' 품종이 18.8%로서 '하령' 품종이 2.7% 높았으나 처리 간 건물률의 차이는 나타나지 않았다. 본 시험을 통하여 '하령' 품종은 친환경 감자 재배를 위한 품종으로 매우 적합할 것으로 확인되었으며, 시비수준, 병해관리 등에 대한 추가적인 연구가 진행되어야 할 것으로 판단되었다.

• 한국유기농업학회지
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• 제24권1호
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• pp.45-59
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• 2016

The Hongseong-Gun school food service center (Hongseong SFSC) that is managed directly by local government is supplying local environmentally friendly foods from 2014. This study aimed to analyze a case on Hongseong SFSC and to propose improving directions. Hongseong SFSC showed higher supply ratio (67.4%) of local environmentally friendly foods compared to the other centers. The operation effects of this center are reliably price of farmer's products, increased consumption of local agri-products, school food confidence, and so on. But there are many problems on this operation. Improvement directions of SFSC for local food system are as follows: Firstly, the supply range of foodstuffs is needed to establish quality standards to increase foodstuffs quality. Secondly, guidelines for creating a fair commission fee structure should be established. Thirdly, the contract issues between the center and schools need to be resolved by governance system. Fourthly, local environmentally friendly agricultural cultivation and cropping systems are required to establish reliably supply of farmer's products.

• 신재생에너지
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• 제4권4호
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• pp.50-55
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• 2008

Recently, sea algae cultivation as carbon sink and carbon dioxide fixation have been considered. Also, various researches on bioenergy derived from sea algae and the utilization of fibers, saccharide, and lipid of sea algae have been performing. Till now, algae fibers has been used for manufacturing of paper and reinforcing of polymer composites and the extracts of sea algae are used for cosmetics, pharmaceutical materials and food such as agar. Especially, algae fiber has so similar properties to cellulose in terms of crystallinity and functional groups that it can be utilized as reinforcements of biocomposites. Biocomposites as alternatives of glass fiber reinforced polymer composites are environmentally friendly polymer composites reinforced with natural fibers and are actively applying to the automobiles and construction industries. In this paper, characteristics of algae fiber and biocomposites reinforced with algae fiber as environmentally friendly energy materials have been introduced.

• 한국유기농업학회지
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• 제19권spc호
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• pp.263-266
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• 2011

Crop protection strategies in organic horticulture aim to prevent insect pest and plant disease problems through utilization of non-chemical based control means. In order to develop a model for management of plant diseases and insects in organic cucumber cultivation, we compared efficacies between chemical pesticide spraying system and biological control means in semi-forcing and retarding cucumber cultivation during 2005 and 2006. Conventional chemical spray program using various chemical pesticides was applied 5 - 10 days intervals, while two different non-chemical pesticide application programs using two formulated biopesticides Topseed$^{TM}$ and Q-fect$^{TM}$, Suncho$^{TM}$, and Sangsungje$^{TM}$ (biocontrol agents 1) and using egg-yolk and cooking oil(EYCO), Bordeaux mixture, Suncho$^{TM}$, and Sangsungje$^{TM}$ (biocontrol agents 2) were applied 5 - 7 days intervals during entire cucumber cultivation period. Efficacy of both biocontrol agents programs was effective to comparable to conventional chemical pesitice spray program to control plant diseases such as powdery mildew and downy mildew as well as insect pests such as aphids and thrips which are known as major threats in cucumber organic cultivation. In this study, we established and evaluated an effective and economic crop protection strategy using various biological resources can be used to control plant diseases and pests simultaneously in organic cucumber cultivation field.

• Mycobiology
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• 제49권5호
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• pp.491-497
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• 2021

An endolichenic fungus Xylaria grammica EL000614 produces grammicin, a potent nematicidal pyrone derivative that can serve as a new control option for root-knot nematodes. We optimized an Agrobacterium tumefaciens-mediated transformation (ATMT) protocol for X. grammica to support genetic studies. Transformants were successfully generated after co-cultivation of homogenized young mycelia of X. grammica with A. tumefaciens strain AGL-1 carrying a binary vector that contains the bacterial hygromycin B phosphotransferase (hph) gene and the eGFP gene in T-DNA. The resulting transformants were mitotically stable, and PCR analysis showed the integratin of both genes in the genome of transformants. Expression of eGFP was confirmed via fluorescence microscopy. Southern analysis showed that 131 (78.9%) out of 166 transformants contained a single T-DNA insertion. Crucial factors for producing predominantly single T-DNA transformants include 48 h of co-cultivation, pretreatment of A. tumefaciens cells with acetosyringone before co-cultivation, and using freshly prepared mycelia. The established ATMT protocol offers an efficient tool for random insertional mutagenesis and gene transfer in studying the biology and ecology of X. grammica.

• 식물병연구
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• 제23권1호
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• pp.19-34
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• 2017

유기농 및 지속 가능한 농산물에 대한 최근의 전 세계적인 수요는 농가 현장에서 사용 가능한 생물 농약의 개발 및 활용에 대한 요구가 증대되고 있다. 그러나 대부분의 생물학적 방제 방법은 실제 현장 조건에서 식물병 방제 스펙트럼이 제한적이고 효능이 높지 않다. 본 연구팀은 키틴분해 미생물과 키틴을 활용하여 적은 비용으로 방제효과가 우수한 키틴 기반 제형을 개발했다. 이 제형은 포장 조건에서 다양한 식물병을 성공적으로 방제하였다. 본 리뷰에서는 성공적인 포장 연구와 관련하여 이 제형에 함유되어 있는 키틴분해미생물들의 생태학적 측면과 생물적 방제 기작에 대해 기술하였다. 또한 현장에서 키틴분해미생물의 현장 대량 배양과 효과적인 생물학적 방제 방법을 사용하여 농민 친화적인 수단으로 확대 할 수 있는 생물적 방제 방법과 전략의 가능성에 대해 논의했다.

• 농약과학회지
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• 제17권1호
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• pp.41-49
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• 2013

본 연구에서는 친환경유기농자재를 사용하여 작물을 재배하는 농업인을 대상으로 설문조사를 시행하여 친환경유기농자재의 사용실태, 부작용 경험 및 친환경유기농자재의 안전성에 대한 인식도 등을 조사하였다. 조사결과 친환경유기농업에 종사하는 농업인이 친환경농업에 참여하는 가장 큰 이유는 안전농산물을 생산하기 위한 것으로 나타났다. 또한 친환경유기농자재의 안전성에 대해 보통이상으로 높게 인식하고 있었으며, 재배면적이 많은 농업인이 재배면적이 작은 농업인에 비해 친환경유기농자재의 안전성에 대한 인식이 더 낮았다. 친환경유기농업 인증을 받은 응답자의 23.6%와 인증을 받지 않은 응답자의 33.8%가 부작용을 경험함으로써 친환경유기농업 인증을 받은 농업인의 부작용 경험 비율이 낮았다. 친환경유기농자재 사용으로 인한 부작용의 종류는 주로 '눈가려움', '손발가려움', '피곤함'으로 나타났으며, 부작용을 경험한 사람($3.79{\pm}1.15$)이 경험하지 않은 사람($4.15{\pm}0.86$)에 비해서 사용방법을 준수하는 비율이 유의적으로 낮게 나타남에 따라 부작용의 발생 여부는 포장지에 기재된 사용방법 준수 행위와 밀접한 관련이 있음을 알 수 있다. 이러한 결과를 근거로 해서 정책 및 교육부문의 개선방안을 제안하기 위해서는 농업인을 대상으로 하는 보다 정밀한 의견 수렴 등의 연구가 필요할 것으로 생각된다.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2023년도 임시총회 및 춘계학술대회
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• pp.16-16
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• 2023

Metabolomics is the study of global metabolite profiles in a system (cell, tissue, or organism) under a given set of conditions. Metabolomics has its roots in early metabolite profiling studies but is now a rapidly expanding area of scientific research in its own right. In this study, the applications of metabolomics in natural product studies are explored. Ginseng is a well-known herbal medicine and has various pharmacological effects, which include antiaging, anticancer, antifatigue, memory enhancing, immunomodulatory, and stress reducing effects. Metabolomic analysis of organic acids has not been performed for evaluation whether ginseng has been cultivated using conventional or environmental-friendly farming methods. In this study, profiling analysis was conducted for organic acids (OAs) in ginseng roots produced using conventional or environmentfriendly farming methods at five locations in each of five regions. In OA profiles, lactic acid was the most abundant OA in all regions, with the exception for environmentally friendly farmed ginseng in two of the five regions, in which glycolic acid was most abundant OA. OA profiles in all regions showed isocitric acid levels were increased by environment-friendly cultivation, which suggests metabolic differences associated from farming method, and that isocitric acid might be a useful discriminatory biomarker of environmental-friendly and conventional cultivation. The results of the present study suggest metabolomic studies of OAs in ginseng roots might be useful for monitoring whether ginseng has been cultivated using conventional or environmentally friendly farming methods.