• 제목/요약/키워드: Plastic-house

검색결과 459건 처리시간 0.02초

플라스틱 하우스의 2단재배를 위한 생육환경에 관한 연구 (Study of Growing Environment for Double Cropping in Plastic Flim House.)

  • 김기성;김문기
    • 한국생물환경조절학회:학술대회논문집
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    • 한국생물환경조절학회 1997년도 가을 심포지움 및 학술논문발표요지
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    • pp.8-13
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    • 1997
  • 온실내 재배면적을 최대한 확보하기위해서 2단으로 베드를 설치할 경우 하단부의 생육환경은 상단부와 많은 차이를 보일 것으로 예상된다. 특히 광환경은 매우 열악할 것으로 예상되지만, 호음성식물(Shade plant)의 경우 광포화점이(400$\mu$mol$^{-l}$ m$^{-2}$ ) 비교적 낮기 때문에 재배가 가능할 것으로 판단된다. (중략)

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에스렐과 탄산칼슘에 의한 하우스 밀감의 착색 촉진 (Ethephon mixed with Calcium Carbonate accelerate Coloration of Satuma mandarin (Citrus Unshiu Marc.) in the Plastic Film House)

  • 김용호;문영일
    • 한국생물환경조절학회:학술대회논문집
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    • 한국생물환경조절학회 1998년도 정기총회 및 학술논문 발표요지
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    • pp.131-139
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    • 1998
  • 여름철 고온기를 지나는 하우스 밀감은 착색이 되기 전에 과육이 선숙되는데, 일반적으로 착색은 고온에 의해 지연된다(Goldschmidt, 1988). 소비자들은 충분히 착색되지 않고 녹색을 띤 밀감은 성숙이 안된 것으로 생각하고 있기 때문에 수확 후 에테폰 처리에 의해 착색을 촉진시키고 있으나(Jimenez-Cuesta 등, 1983) 과경부의 꼭지가 쉽게 건조되고 짙은 오렌지색으로 발색되지 않고 연한 노란 색으로 되어 상품성이 높지 못하다. (중략)

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FS-338 액비의 엽면시용이 하우스 밀감의 품질에 미치는 영향 (Effects of FS-338 Foliar Spraying on the Fruit Quality of Satsuma Mandarin in the Plastic Film House)

  • 김용호;한승갑
    • 한국생물환경조절학회:학술대회논문집
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    • 한국생물환경조절학회 1998년도 정기총회 및 학술논문 발표요지
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    • pp.140-147
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    • 1998
  • 과육선숙 경향이 있는 온주밀감에서는 착색시에 수확을 하여 인공착색(북천, 1974)을 하는 경우도 있지만 시장가격이 높게 형성되는 시기에 수확이 집중되어 소비자나 시장관계자의 불평을 사는 일이 있다. 이러한 연유로 인해서 실제 재배에서는 착색저해나 착색지연 등의 제 요인을 제거(고교, 1965 : 송본, 1975)하는 것 이외에 오히려 적극적으로 착색촉진을 목적으로 한 비배관리나 착색촉진제 등(광뢰 등, 1970 : 암원, 1979 : 암원등, 1979)이 사용되어져 왔다. (중략)

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대규모 생물생산 시설의 환경 영향 연구 (A Study on the Environmental Impact of Biological Production Facilities)

  • 남상운
    • 한국농공학회지
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    • 제38권5호
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    • pp.106-115
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    • 1996
  • This study was carried out to provide fundamental data for reuse of resources and prevention of environmental pollution Actual states of environmental pollution by biological production facilities were investigated. Various pollution loads and quantity of wastes from greenhouse and animal housings estimated. In greenhouse contents of investigation were wastes of plastic cover, noise of heater and fan, air pollutant of heater, and wastes of soilless culture system, etc. In animal housings, those were actual state of livestock waste treatment and reuse, pollutant mass unit discharge, noise pollution, and malodorant, etc. The main pollutants discharged from greenhouses were wastes of plastic cover, rockwool, and waste fluid of nutrient solution. Developments of waste disposal methods for plastic cover and rockwool are required. And recycle technique of nutrient solution for soilless culture should be developed and propagated. With the buildup of legal control, pollutant mass discharged from livestock wastes are, on the decrease. The other side, reuse of livestock excreta increased. Most animal housings are located near the dwelling house. Malodorant and noise from animal housings have bad effects on the rural living conditions. So developments of integrated complex for small scale livestock farms are required.

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유한요소법에 의한 Duplex 스테인레스 강의 초소성 해석 (Superplstic Forming Analysis of Duplex Stainless Steel with Finite Element Method)

  • 박지원;강석봉;황영진;이석순
    • 한국정밀공학회지
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    • 제26권10호
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    • pp.89-96
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    • 2009
  • In recent years, there has been a considerable interest in the application of super plastic forming in the aircraft and automotive industries. This requires a detailed design of the technological process in order to exploit its peculiar potentialities better. Nowadays, the finite element method is used to plan the sheet metal forming processes whose simulation requires determination of material constants for super plastic materials. The present work is aimed to show a simple method to characterize super plastic materials duplex stainless steel which was formed by a constant gaspressure to hemispheres with and without back pressure. The forming operation was performed using an in-house designed and built biaxial forming apparatus. The temporal change of dome heights of hemispheres were measured for applying the pressures. The flow stresses and strain rates developed at the top of the dome during the forming step were shown to follow closely the flow stress - strain rate relationship obtained from the strain rate change tests performed at the same temperature.

드 스틸의 조형적 건축, 그 유토피안 비전 (The 'Plastic Architecture' of De Stijl, Its Utopian Vision)

  • 윤난지
    • 미술이론과 현장
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    • 제9호
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    • pp.151-170
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    • 2010
  • As an art group, De Stijl (1917-1931) led a total art movement encompassing painting, sculpture, design, and architecture. Among these, architecture, as a model of the total art pursued by the group, was encapsulated by the term 'plastic architecture.' The term reflects architecture's shared features with plastic art, especially its pictorial characteristics. Firstly, De Stijl architecture shares geometric form with painting. Assembled in simple, clear and rational structures, the geometric forms signified universal forms, and extended the pictorial experimentation that Mondrian exercised through Neo-Plasticism to architecture. Constructed with colour fields made of concrete wall, De Stijl architecture is geometric abstract painting embodied in space. Together with such pictorial characteristics, large plate glass windows, narrow window frames, and cantilever structure minimize the building's visual weight. De Stijl architecture, which appears suspended in the air, is an architectural version of the abstract paintings of the era that revealed unknown spaces beyond perspective. De Stijl architecture is also an 'open' architecture, where the units placed as if radiating from the center form relations with each other flexibly and organically. The observer in such a space is encouraged to experience space within time, as his/her physical and visual mobility and extension are maximized. De Stijl architecture is an example of how the time-space continuum, represented within picture frame through Cubism, Futurism, and abstract art, can be realized in space. By transforming the ideal space of painting into real space in this way, 'plastic architecture' turned out to be an architectural manifestation of the utopianism of the era, aimed at building a society in 'perfect harmony.' However, such rationalism and universalism are not free from the violence of totalization that deletes various differences. This is evident in the history that followed as the geometric form of architecture and urban planning proliferated across the globe, engulfing the diverse natural landscapes and local cultures.

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Red Pepper Productivity and Soil Properties as Affected by Different Intervals of Side-dressing N and K Applications in Plastic Film House

  • Ahn, Byung-Koo;Im, Ga-Young;Kim, Kab-Cheol;Chon, Hyong-Gwon;Jeong, Seong-Soo;Lee, Jin-Ho
    • 한국토양비료학회지
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    • 제47권3호
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    • pp.147-154
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    • 2014
  • Consecutive pepper cultivation in plastic film houses may lead to salt accumulation because pepper is considered a heavy nutrient feeder. For this reason, appropriate methods of fertilizer application should be established. Thus, we investigated the effect of different intervals of side-dressing N and K fertilizer applications on soil and red pepper in a plastic film house. All the amounts of recommended compost and phosphorus fertilizer were applied as basal dressing. Cultivars of the pepper plant were Cheon-Ha-Dae-Se (CHDS) and NW-BiGaLim (NW-BGL). Nitrogen and potassium fertilizers were treated as side-dressing at different intervals, 22 times in every 10 days, 15 times in every 15 days, and 11 times in every 20 days. Soil pH decreased with decreasing the intervals of side-dressing applications, whereas electrical conductivity (EC) declined with the increasing fertilizer application intervals. In particular, EC value decreased by up to 75% with CHDS cultivar in the plot of 20 day-interval and with NW-BGL cultivar in the plot of 15 day-interval. The concentrations of available phosphorus in the soils increased with increasing the interval. The concentration of exchangeable $K^+$ increased but exchangeable $Ca^{2+}$ and $Mg^{2+}$ decreased in all the plots, except in the control plot. The concentrations of nitrogen and phosphorus in leaves of the pepper plants were lowest in the control plot. Potassium concentrations in the pepper leaves were high in the control plot and in the plots of CHDS with 10 day-interval and NW-BGL with 15 day-interval. Red pepper productivity was high in the plots of 10- and 15 day-intervals for CHDS cultivar and 15- and 20 day-intervals for NW-BGL cultivar. Therefore, the 15 day-interval of side-dressing N and K applications was considered as an appropriate method for cultivating pepper plants and protecting soil in plastic film houses.