• 한국버섯학회지
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• 제15권4호
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• pp.269-272
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• 2017

잎새버섯 원목재배 연차별 수량특성 조사결과 '잎새1호'의 경우 첫해에 $16.0kg/m^2$, 2년차에 $15.4kg/m^2$, 3년차에 $9.5kg/m^2$, 4년차에 $4.6kg/m^2$, 그리고 5년차에는 $4.6kg/m^2$로 5년간 총 $50.0 kg/m^2$의 수량을 나타냈으며, 3년차 이후 수량이 급격히 줄어드는 경향을 나타냈다. '다박' 품종에서는 첫해에 $12.3kg/m^2$, 2년차에 $11.5kg/m^2$, 3년차에 $12.7kg/m^2$, 4년차에 $6.2kg/m^2$, 그리고 5년차에는 $8.2kg/m^2$로 5년간 총 $50.8kg/m^2$의 수량을 나타냈다.

• 한국초지조사료학회지
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• 제40권2호
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• pp.87-97
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• 2020

본 연구는 우리나라 중부 및 남부지역에서 초지환경과 재배기술의 현장실천 정도에 따른 초지 생산성의 변화 요인을 분석하기 위하여 2017부터 2018년까지 수행되었다. 2017년 10개소 초지의 평균 건물수량은 7,492 kg/ha이었으며 초지별로는 4,652~13,292 kg/ha 범위로서 차이가 많았으며, 초지별 최소유의차는 1,577 kg/ha이었다(p<0.05). 2018년 10개소 초지의 평균 건물수량은 7,914 kg/ha이었으며 초지별로는 3,927~12,372 kg/ha 범위로서 차이가 많았으며, 초지별 최소유의차는 1,464 kg/ha이었다(p<0.05). 재배 환경 중에서 강수량과 평균온도는 초지 건물수량과 상관이 없었으나 초지토양의 비옥도와 건물수량 간에는 고도의 상관이 있는 것으로 나타났다(p<0.01). 또한 시비관리 및 초지보파 등 초지관리기술의 현장적용 정도와 건물수량 간에는 고도의 상관(p<0.01)이 있는 것으로 나타났다. 이러한 결과들은 우리나라 중부 및 남부지역에서 기후변화에 대응하여 초지의 건물수량 증가를 위해서는 초지 관리기술의 현장실천과 초지토양 비옥도 증진의 중요성을 제시하고 있다.

• Parasites, Hosts and Diseases
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• 제48권1호
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• pp.49-55
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• 2010

In vitro cultivation of trematodes would assist studies on the basic biology of the parasites and their hosts. This is the first study to use the yolk of unfertilized chicken eggs as a simple and successful method of ovocultivation and the first time to obtain the adult-stage of the trematode Cymatocarpus solearis Braun, 1899 (Digenea: Brachycoeliidae). Chicken eggs were inoculated with metacercariae from the muscle of the spiny lobster, Panulirus argus (Latreille, 1804). The metacercariae were excysted and incubated for 576 hr (24 days) at $38^{\circ}C$ to obtain the adult stage. Eggs in utero were normal in shape and light brown color. The metacercariae developed into mature parasites that have been identified as the adultstage found in marine turtles. The adult lobsters collected in Quintana Roo State, Mexico, showed the prevalence of 49.4% and the mean intensity of 26.0 per host (n=87). A statistical study was performed to determine that no parasitic preference was detected for male versus female parasitized lobsters. Morphometric measurements of the adult-stage of C. solearis obtained in our study have been deposited in the National Helminths Collection of the Institute of Biology of the National Autonomous University of Mexico. This study is significant because it is the first time that a digenean of the family Brachycoeliidae has been demonstrated to develop in vitro from metacercariae into adults capable of producing eggs using the yolk of unfertilized chicken eggs. Secondly, this technique allows to obtain the adult stage of C. solearis without the presence of its marine turtle host, allows us to describe the mature parasites, and thus contribute to our understanding of the biology of C. solearis.

• 한국환경농학회지
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• 제31권1호
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• pp.52-59
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• 2012

BACKGROUND: Cultivation of genetically modified(GM) crops rapidly has increased in the global agricultural area. Among those, herbicide resistant GM crops are reported to have occupied 89.3 million hectares in 2010. However, cultivation of GM crops in the field evoked the concern of the possibility of gene transfer from transgenic plant into soil microorganisms. In our present study, we have assessed the effects of herbicide-resistant GM Chinese cabbage on the surrounding soil microbial community. METHODS AND RESULTS: The effects of a herbicide-resistant genetically modified (GM) Chinese cabbage on the soil microbial community in its field of growth were assessed using a conventional culture technique and also culture-independent molecular methods. Three replicate field plots were planted with a single GM and four non-GM Chinese cabbages (these included a non-GM counterpart). The soils around these plants were compared using colony counting, denaturing gradient gel electrophoresis and a species diversity index assessment during the growing periods. The bacterial, fungal and actinomycetes population densities of the GM Chinese cabbage soils were found to be within the range of those of the non-GM Chinese cabbage soils. The DGGE banding patterns of the GM and non-GM soils were also similar, suggesting that the bacterial community structures were stable within a given month and were unaffected by the presence of a GM plant. The similarities of the bacterial species diversity indices were consistent with this finding. CONCLUSION: These results indicate that soil microbial communities are unaffected by the cultivation of herbicide-resistant GM Chinese cabbage within the experimental time frame.

• 한국산학기술학회논문지
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• 제16권9호
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• pp.5859-5864
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• 2015

본 연구는 농촌진흥청에서 기술시범사업으로 추진하고 있는 마늘주아재배 기술 사업에 대하여 농업경영체의 신기술 수용에 대한 태도, 신기술의 타당성 분석, 기술도입 전후의 경영효과를 분석하는데 그 목적이 있다. 마늘주아재배 농가들은 농업 신기술에 대한 요인들 중 기술만족도(4.30)가 가장 높았으며, 그 다음 새로운 것을 적극적으로 선호하고자 하는 혁신성(4.21) 순으로 나타났다. 반면에 신기술에 대한 위험에 대해서는 관대한 것으로 나타났다. 한편, BMO 모델을 이용하여 마늘 주아재배 기술 사업에 대한 타당성을 평가한 결과에 따르면, 사업 매력도와 적사도가 각각 44점, 45점으로 사업 성공률이 80%이상으로 높았다. 마늘주아 재배기술의 도입 전후의 경영성과 분석에서도 이 사업 참여 농가들은 신기술을 도입 한 후 종구비 절감(43%) 및 수량증가(28%) 등 전반적으로 경영이 개선된 것으로 나타났다.

• 자원환경지질
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• 제51권6호
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• pp.567-577
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• 2018

우리나라에서 수막재배가 주로 이루어지는 수변지역에서는 수막재배 성수기 말기에 지하수위 하강이 심하게 나타나는 문제점이 있으며, 이러한 지하수위 하강과 지하수 자원 고갈의 문제는 인근 하천수와의 연계 특성을 고려할 때 효율적으로 해결할 수 있을 것이다. 이 연구에서는 수막재배지에서의 지하수와 하천수와의 연계성 및 지하수 대수층에 미치는 하천수의 영향 범위를 논의하기 위해, 지하수의 토출온도, 지하수와 하천수의 산소 수소 안정동위원소 조성 변화 특성을 검토하였다. 연구지역은 딸기 수막재배지로 잘 알려진 논산시 광석면 왕전리 지역이며, 지하수와 하천수의 시료 채취는 2010년 2월부터 2011년 6월까지 실시되었다. 지하수의 수온 분포 패턴에 의하면, 하천수의 영향은 주로 수막재배지의 우측 부분에서 넓은 범위에 걸쳐 나타났으며, 좌측 부분은 하천 인근에서만 좁은 범위의 영향을 받고 있는 것으로 나타났다. 이러한 현상은 수막재배지 내에서 산출되는 지하수의 산소 수소 안정동위원소 조성에서도 유사한 양상으로 나타났다.

• 농업과학연구
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• 제49권3호
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• pp.643-653
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• 2022

This study investigated which nutrient solution is suitable for growth and secondary metabolite contents when three different vegetable plants are grown simultaneously in one hydroponic cultivation bed. Seeds of pak choi (Brassica compestris L. ssp chinsensis), red mustard (Brassica juncea L.), and arugula (Eruca sativa Mill.) were sown in the shape of a triangle in three places on rockwool cubes. The rockwool cubes were placed in semi deepflow technique (semi-DFT) hydroponic systems in a rooftop greenhouse after three weeks of growth as seedlings then cultivated with four different nutrient solutions, Korea Horticultural Experiment Station (KHE), Hoagland, Otsuka-A, and Yamazaki, at the rooftop greenhouse for two weeks. The leaf area of pak choi cultivated in Otsuka-A was the largest but SPAD values, leaf area, and fresh weight of arugula were highest with KHE treatment. The total glucosinolate (GSL) content of pak choi was 151.7% higher in KHE than in Hoagland, and there was no significant difference in Yamazaki and Otsuka-A treatments. The total GSL content of red mustard was 34.6 μmol·g^-1 in Hoagland, and it was 32.6% higher in Hoagland than in Yamazaki. Total GSL content of arugula was 57.5% higher in Yamazaki and Hoagland nutrients than in KHE and Otsuka-A nutrients solutions. The total GSL content of three plants grown with KHE was 40.7% higher than with Yamazaki, and the other nutrient solutions did not show significant differences. Therefore, KHE nutrient solution is considered suitable for nutrient solution composition for the cultivation of three different Brassicaceae crops in a single hydroponic cultivation system.

• 한국농공학회:학술대회논문집
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• 한국농공학회 1998년도 학술발표회 발표논문집
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• pp.490-499
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• 1998

This study was initiated to investigate the applicability of sludge from water or waste water treatment on the crop cultivation. Sludge is generated in the process of water and wastewater treatment process in large quantity. The sludge can cause many environmental problems. we have a many available treatment methods of sludge However, these methods still shortcomings and are not. The composition of typical municipal sludge contains organics and inorganics. The organics components are normally burnt in high temperature and mainly inorganics components are left after thermal treatment process. For the production of artificial media, chabazite was used as additive, and the mixed material was thermally treated in the firing kiln at 800~1,10$0^{\circ}C$ for about 10 minutes. The physical and chemical characteristics of artificial media were analyzed and it showed that the artificial media could be used as a media for plants and soil conditioner for farmland. The concentrations of the toxic heavy metals in the media were lower then those in the soil quality standard for farmland. This study illustrated that the artificial media production process, and introduced how to produce it's possible application as a media for Plant growth.

• Journal of Microbiology and Biotechnology
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• 제17권1호
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• pp.168-175
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• 2007

We report here on the cultivation of numerous novel bacterial species from a eutrophic freshwater pond. A total of 60 strains, 15 strains per each culture medium, were obtained from the surface of a eutrophic freshwater pond by employing a conventional dilution-plating method with four different kinds of culture media, including R2A, 1/10R2A, PCA, and 1/10PCA. Among the 60 strains isolated, 27 strains showed less than 97% 16S rRNA gene sequence similarities to validly published species, and thus they are considered to comprise 19 novel species. Of the 27 strains assigned to the novel species, the majority of the strains (20 strains) were affiliated with the Alphaproteobacteria and Betaproteobacteria. The remaining 7 strains were affiliated with the Gammaproteobacteria, Firmicutes, Actinobacteria, and Deinococci. Because we have isolated 19 novel species from a usual freshwater pond using a conventional culturing technique, our results suggest that an unexplored ecosystem, even if it looks like a common ecosystem found elsewhere, harbors diverse unidentified microbes, which will be definitely further characterized.

• Journal of Biosystems Engineering
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• 제20권1호
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• pp.22-35
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• 1995

Pepper is the most important horticultural plant in Korean farm. Pepper harvesting has been known to be the most difficult process in pepper cultivation so that demand for mechanization is strong. In a research to develop a pepper harvesting machine performance and capacity of the harvester should be determined based on both economical feasibility and machine design concept. In order to accomplish an economical analysis of the pepper harvester, a mathematical model for comparing manual harvesting cost to machine harvest cost was developed. Validity of the model depends on the data used in the model. Economical information for the model variables was acquired from the result of farm survey on pepper cultivation technique and economics of pepper farmer. Technical information on pepper harvester were also collected through literature review and analyzed. Based on the economical analysis and synthesis of the technical information on pepper harvesters, its performance and capacity were determined. The operating performances of the harvester such as cutting, conveying, flipping, pepper removing and post-processing (sorting) were determined. Daisy capacity of the machine was determined to be 0.41 ha. A pepper harvester with the suggested capacity was economically feasible if the price of pepper harvester, pepper recovery ratio and service life of harvester were about 6 million won, 80%, and 4 years, respectively.