• 원예과학기술지
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• 제31권1호
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• pp.24-31
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• 2013

This study was conducted to determine the characteristics of quality and yield in potatoes grown at paddy field before rice transplantation during the spring season. Three potato cultivars ('Jowon', 'Haryeong', and 'Goun') were grown in Gangneung (asl 5 m) and Seocheon (asl 20 m). In both locations, weather condition belonged to the fourth zone (spring cropping) in potato production location's distribution of Korea. Daily mean soil temperature in both the locations was $0.2-0.6^{\circ}C$ lower than air temperature, while soil moisture was adequate level to potato growth in spite of spring drought. TR ratio was not affected by location, but by cultivar. Specific gravity, starch content, dry matter rate, and yield were significantly influenced by location and by cultivar. There was no difference in total tuber number by location, however there was a large gap in marketable tuber yield according to locations and cultivars. There were high negative relationships between yield and main qualities such as dry matter rate and starch content, while high positive correlation was observed between main qualities. It was possible to produce potato before rice transplanting at drained paddy fields located in representative two locations of potato spring cropping and their characteristics in growth and quality were similar to those generally well known in upland cultivation. Paddy field was thought to be more favorable than upland in terms of available soil moisture supply against spring drought. Further research, however, was needed to increase soil temperature and also preliminary review on proper cultivar according to location seemed to be needed for high yield.

• 한국균학회지
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• 제46권3호
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• pp.227-233
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• 2018

A fungus was isolated from field soil collected from Daegu, Korea. The colony of the isolated fungus showed short, branched, and light to dark yellow pigments with hyaline, yellowish red to orange brown aerial mycelia. In addition, the fungus produced solitary to aggregated perithecia, ovoid to pyriform, short neck, and asci as well as biseriately arranged ascospores. Phylogenetic analysis using the internal transcribed spacer region and translation elongation factor $1-{\alpha}$ sequences and morphological characteristics identified the isolated fungus as Penicillifer diparietisporus, which belongs to the family Nectriaceae. To our knowledge, this is the first report of Penicillifer diparietisporus in Korea.

• 인간식물환경학회지
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• 제23권6호
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• pp.615-624
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• 2020

Background and objective: Urbanization caused a reduction in urban green space and a lack of community spaces. An attempt to solve these problems, urban gardens, have become popular and are currently being implemented in various downtown areas. However, urban gardens have some inadequate aspects from a visual or landscape perspective. The goal of this study was to examine the possibility of an aesthetic and productive garden space by introducing cultivation methods through the planting system design process. Methods: The design process using plants was classified and presented to suggest the importance of the landscape and aesthetic value. An urban garden space was designed according to the perspective of 'production scenery' and 'participation aesthetics'. According to the characteristics of the plant, urban gardens were divided into vertical type (corn, millet, sorghum), climbing type (kidney bean, cucumber, bitter gourd), and runner type (melon, watermelon, peanut). After classifying plants according to the shape of the root, the structure supporting climbing was installed and the crops were cultivated in an upright form with a tunnel. Results: In the designed cultivation, each crop cooperates, without invading each other's space. Compared with the conventional cultivation, there was little difference in production, and management was made more convenient since weed outbreaks were effectively suppressed while runner type crops cover over the land's surface. Since the positions of each crop are clearly distinguished, the aesthetic value is improved by offering a sense of rhythm with a balanced design. Conclusion: The results suggest that the cultivation methods through the plant system design process have aesthetic as well as productive value, and the design using plants, an infinite living resource, could lead to an expansion of the design field. Moreover, it would enable a sustainable symbiosis between industry and environment. There is potential for the design industry to make significant progress through collaboration with agriculture, horticulture, and landscape architecture.

• 농업과학연구
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• 제40권3호
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• pp.177-182
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• 2013

A genus Camelina has been attracted as a promising oil crop, especially available in drought and marginal conditions. Due to more demands on arable land for bioenergy crops, price of agricultural products has been a challengeable issue. In that respect, development of Camelina crop with higher germination rate and germination energy can be a strategy to secure seedling establishment, nutrient uptake and long vegetative period. In order to be easily available in the field and laboratory conditions, Camelina seed needs to be optimized for its germination temperature. Germination temperature regime was in a range of 8 to $32^{\circ}C$ initially, and consecutively narrowed down to 8 to $20^{\circ}C$. Based on the temperature range, Camelina germinated greater than 96% at $8-16^{\circ}C$ in two weeks after sowing, but germination rate started to decrease at the higher than $24^{\circ}C$ and was significantly low at higher than $32^{\circ}C$. In terms of rapid time to reach the maximum germination rate and greater germination energy, temperature ranged from 12 to $16^{\circ}C$ was found to be desirable for Camelina germination. Although germinationa rate was greater at $16^{\circ}C$, lower temperature close to $12^{\circ}C$ would be favored for the field conditions where greater root growth leading to healthier seedlings and better nutrient or water availability is considerably demanded.

• 농업과학연구
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• 제42권4호
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• pp.305-311
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• 2015

In this research, we surveyed the yield change of garlic cultivation with seed bulbs according to annual field culture after induced meristem culture. From 2007 to 2013, yearly produced seed bulbs from $2^{nd}$ to $8^{th}$ generation were cultivated in the Muan field. Over the generations, the general growth characteristics such as the plant height, leaf number, leaf length and stem diameter were all decreased. When we compared the conventional seed bulbs and TCR ones, the plant height and stem diameter showed bigger difference. And the TCR seed bulbs showed a week late harvest time against the conventional ones. The yield of $2^{nd}$ generation was 72.3 g and 57.1 g for the $8^{th}$ generation. However every generation showed higher yield than conventional seed garlic's ones as 43.9 g. The yield index showed the same trend as $2^{nd}-8^{th}$ to 63% to 21%. After the tissue culture of garlics, the viral infections (OYDV and GSV) of TCR was far less than that of conventional ones. In case of LYSV, the infection ratio was 6.7% at $2^{nd}$ generation and 26% at $8^{th}$. However, the ratio was far less than that (80%) of the conventional ones.

• 식물병연구
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• 제27권1호
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• pp.32-37
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• 2021

2020년 전라북도 완주 소재 약용작물 전시포장에서 재배중인 범부채(Iris domestica) 140개체 가운데 3개체의 잎에서 괴사증상이 발견되었다. Reverse transcription polymerase chain reaction 검정결과 증상을 나타내는 3개체가 tomato spotted wilt virus (TSWV)에 감염된 것으로 확인되었다. 증상주로부터 분리한 TSWV 분리주 'Blackberry lily-kr1'의 전체 염기서열을 결정하였으며, 유전자 은행에 있는 다른 분리주들과 L, M, S 분절유전체 부위의 염기서열 상동성을 비교하였다. 'Blackberry lily-kr1' 분리주는 L 분절 유전체는 우리나라에서 보고한 'JJ' 분리주(MF159046) 또는 'HJ' (LC273305) 분리주와 상동성이 높았으며, M과 S 분절 유전체는 'JJ' 분리주(MF159058과 KY021439)와 가장 상동성이 높았다. MEGA X 프로그램의 maximum likelihood 방법을 이용하여 'Blackberry lily-kr1'의 다른 TSWV 분리주들과의 계통학적 연관성에 관한 분석을 한 결과 L, M, S 분절유전체 모두 고추에서 분리한 'JJ' 분리주 및 환삼덩굴(Humulus japonicas)에서 분리한 'HJ' 분리주와 높은 연관성을 보였다. 건전한 I. domestica 식물에 'Blackberry lily-kr1'을 감염시킨 Nicoatiana rustica 식물 즙액을 접종한 결과 50일 후에 잎에 괴사 또는 이중 고리형태의 괴사 증상이 형성되었다. 이는 노지에서 재배하는 범부채에서 관찰된 괴사증상이 TSWV 감염에 의한 것임을 시사하는 결과이다. 이 연구는 우리나라에서 범부채에서 TSWV 발생에 관한 최초의 보고이다.

• 한국응용곤충학회지
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• 제48권2호
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• pp.237-243
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• 2009

양배추 유묘에서 도둑나방 유충의 경제적 피해허용수준과 요방제 수준을 설정하기 위하여 도둑나방 유충 접종 밀도에 따른 양배추의 생육, 피해 및 수량을 조사하였다. 포장실험에서 파종 40일 양배추 유묘에 주당 0, 1, 4, 8, 16마리의 도둑나방 2령 유충들을 접종하고 30일 후 수량조사결과 처리 간 사이가 없었고, 양배추는 도둑나방 가해에 대하여 보상적 반응을 보였다. 반면, 유리온실 실험에서 정식 25일 양배추 유묘에 주당 0, 2, 5, 8, 12마리의 도둑나방 2령 유충들을 접종한 결과 15일 후 양배추의 평균생체중은 무처리에서 38.3g, 2마리 접종구에서 36.7g, 5마리 접종구에서 21.7g, 8마리 접종구에서 23.3g, 12마리 접종구에서 16.7g으로 도둑나방 유충의 접종수가 증가할수록 양배추의 생체중은 유의하게 줄어들었다. 도둑나방 유충 발생과 수량손실과의 관계를 구명하기 위하여 누적발생일수(cumulative insect days)와 양배추 유묘의 손실률(%)과의 관계를 회귀분석한 결과 비선형식인 logistic 모형에 잘 적용되었다. 이 식으로부터 수익한계인(gain threshold) 5%와 양배추 상품화율(91%)을 감안했을 때, 수량 감소율 14%에서 도둑나방 2령 유충의 경제적피해수준은 44 CID 이었다. 또한 요방제 밀도는 경제적 피해수준의 80%가 되는 35 CID로 추정되었다. 본 결과는 양배추 유묘시기에 도둑나방 유충을 방제하기 위한 경제적인 방제적기를 제공함으로써 본 해충의 효율적인 관리에 활용될 수 있을 것으로 판단된다.

• The Plant Pathology Journal
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• 제36권3호
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• pp.204-217
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• 2020

In nature, plants are always under the threat of pests and diseases. Pathogenic bacteria are one of the major pathogen types to cause diseases in diverse plants, resulting in negative effects on plant growth and crop yield. Chemical bactericides and antibiotics have been used as major approaches for controlling bacterial plant diseases in the field or greenhouse. However, the appearance of resistant bacteria to common antibiotics and bactericides as well as their potential negative effects on environment and human health demands bacteriologists to develop alternative control agents. Bacteriophages, the viruses that can infect and kill only target bacteria very specifically, have been demonstrated as potential agents, which may have no negative effects on environment and human health. Many bacteriophages have been isolated against diverse plant-pathogenic bacteria, and many studies have shown to efficiently manage the disease development in both controlled and open conditions such as greenhouse and field. Moreover, the specificity of bacteriophages to certain bacterial species has been applied to develop detection tools for the diagnosis of plant-pathogenic bacteria. In this paper, we summarize the promising results from greenhouse or field experiments with bacteriophages to manage diseases caused by plant-pathogenic bacteria. In addition, we summarize the usage of bacteriophages for the specific detection of plant-pathogenic bacteria.

• 한국약용작물학회지
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• 제21권4호
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• pp.289-295
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• 2013

This study was carried out to investigate the cause of leaf discoloration occurring frequently in paddy cultivation. Chemical property of soil and inorganic nutrient component of leaf were analyzed on abnormal fields of 7 regions where leaf discoloration occurred severely and normal fields of 7 regions among ginseng garden. The pH of abnormal fields was strong acidic condition (pH 5.51) compare to normal fields of slightly acid condition (pH 6.42). Calcium and magnesium content in abnormal fields were lower distinctly than that of normal fields, while EC, organic matter, phosphate, and potassium content showed not distinct difference between abnormal and normal fields. Whereas calcium and magnesium content were distinctly high in normal fields, both of potassium and iron content of ginseng leaf were distinctly high in abnormal fields. In particular, iron content of abnormal fields was more 1.94 times in soil, and 3.03 times in leaf than that of normal fields. In soil chemical property, there were significant negative correlation between leaf discoloration ratio and soil pH, and there were also significant positive correlation between leaf discoloration ratio and iron content. In ginseng leaf, there were highly significant negative correlation between leaf discoloration ratio and calcium content, and there were also highly significant positive correlation between leaf discoloration ratio and iron content.

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2012년도 심포지엄 및 춘계학술발표회
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• pp.121-122
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• 2012