• Title/Summary/Keyword: 양액재배

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Development of Optimum Nutrient Solution for Strawberry( Fragaria ananassa D.) in Hydroponics (딸기의 순환식 고형배지 재배에 적합한 배양액 개발)

  • 윤혜진;홍연숙;최은영;이용범
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • pp.115-125
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    • 1998
  • 딸기는 숙근성 초본이며 내한성이 강한 과채류로 노지면적은 계속 감소하여 1996년에 907 ha이나, 시설재배면적은 계속 증가하여 6236 ha를 나타내고 있다. 이와 같이 딸기는 이제 대부분의 생산량이 시설 내에서 생산되고 있다. 유럽과 일본 등에서 딸기의 양액 재배 면적은 급속히 증가하고 있는데 비해 국내에서의 딸기 양액재배 면적은 극히 적은 면적에 지나지 않지만, 앞으로 생산성과 품질의 증가가 기대되는 작물이기 때문에 재배 면적의 증가가 기대되는 채소작물 중 하나이다. (중략)

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Effects of Nutrient Solution Concentrations on Turnip(Brassica raps L.) Growth (순무(Brassica rapa L.)의 생육에 미치는 배양액농도의 영향)

  • 박권우;강호민;박용건
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • pp.56-57
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    • 1996
  • 순무는 근채류 중 20일 무 다음으로 생육기간이 잘아 양액재배시 순환이 빨라 공장적으로 생산될 수 있는 작물이다. 현재 유럽과 일본 등지에서는 상당한 수요가 있으나 우리나라에서는 강화 등지에서 소규모로 재배되기 시작한 실정이다. 그러나 서양채소에 대한 관심의 증가와 함께 국내에서도 그 수요가 증가될 것이라고 보인다. 이에 순무의 양액재배에 적합한 양액의 농도를 알아보고자 본 실험을 수행하였다. (중략)

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Nutrient Solution Control for Recirculating Hydroponics in Successive Culture of Lettuce (재순환식 상추 양액재배를 위한 양액관리 기술)

  • 이수연;이성재;서명훈;이상우;심상연
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • pp.92-94
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    • 1998
  • 최근 도시근교 시설재배토양의 염류 과다집적과 연작장해 발생으로 생산성이 저하되고 있다. 그리고 고품질 연중생산이 가능한 양액 재배 면적이 '93년 23ha에서 '97년 414ha로 급속히 증가되고 있는데 이 중 약12%가 담액경이나 박막수경의 순수 수경재배 방식이 차지하고 있다. 순환식 담액수경 상추재배를 기준으로 할 때 농가 300평 재배시 약 100ton의 양액이 소요되며 이 양액은 1회 재배가 끝난 후 상당량이 폐기되고 있고 고형 배지경 양액 재배의 경우에도 대부분 비 순환식 재배로 1회 관수 후 나오는 배액이 그대로 버려지고 이어 토양 및 지하수 등 환경오염, 자원 낭비 등의 여러 가지 문제를 야기시키고 있다. (중략)

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Development of a Supporting System for Nutrient Solution Management in Hydroponics - II. Estimation of Electrical Conductivity(EC) using Neural Networks (양액재배를 위한 배양액관리 지원시스템의 개발 - II. 신경회로망에 의한 전기전도도(EC)의 추정)

  • 손정익;김문기;남상운
    • Journal of Bio-Environment Control
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    • v.1 no.2
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    • pp.162-168
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    • 1992
  • As the automation of nutrient solution management proceeds in the field of hydroponics, effective supporting systems to manage the nutrient solution by computer become needed. This study was attempt to predict the EC of nutrient solution using the neural networks. The multilayer perceptron consisting of 3 layers with the back propagation learning algorithm was selected for EC prediction, of which nine variables in the input layer were the concentrations of each ion and one variable in the output layer the EC of nutrient solution. The meq unit in ion concentration was selected fir input variable in the input layer. After the 10,000 learning sweeps with 108 sample data, the comparison of predicted and measured ECs for 72 test data showed good agreements with the correlation coefficient of 0.998. In addition, the predicted ECs by neural network showed relatively equal or closer to the measured ones than those by current complicated models.

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Development of a Supporting System for Nutrient Solution Management in Hydroponics (2) Estimation of Electrical Conductivity(EC) using Neural Networks (양액재배를 위한 배양액관리 지원시스템의 개발 (2) 신경회로망에 의한 전기전도도의 추정)

  • 손정익;김문기;남상운
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • pp.12-13
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    • 1992
  • 양액재배에 따른 배양액 관리의 자동화가 진행될수록, 배양액을 효율적으로 관리할 수 있는 배지원시스템이 필요하다. 최근 시설원예의 환경관리 등에 AI 수법이 도입되고 있고 양액관리도 예외는 아니다. 신경회로망은 패턴인식, 학습 등의 분야에서 유망한 수법으로 인정되고 있고 통계적수법에 유사한 분석 등에도 적용되고 있다. 본 연구에서는 신경회로망을 이용하여 각 이온의 농도를 입력(독립변수), 전기전도도를 출력(종속변수)로 하는 비선형 증회귀분석을 시행하여 배양액의 전기전도도의 추정 및 신경회로망의 적용성 여부를 검토하였다. (중략)

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Environmental Control of Nutriculture in a Plant Production System Utilization Solar Energy -Investigation of Actual State of the Nutriculture in Korea- (태양에너지를 이용한 식물(植物) 생산(生産) 시스템내의 양액재배(養液栽培) 환경조절(環境調節)에 관(關)한 연구(硏究) -국내(國內) 양액재배(養液栽培) 실행농가(實行農家)의 실태조사(實態調査)-)

  • Kim, M.K.;Nam, S.W.;Son, J.E.
    • Journal of Biosystems Engineering
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    • v.16 no.2
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    • pp.178-187
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    • 1991
  • In order to provide fundamental data for the achievement of safe environmental condition, investigation of the actual state of the nutriculture practices in Korea was carried out. The result obtained are summarized as follows. 1. Cultivation area of nutriculture was 6 ha and culture types included deep flow technique(43%), nutrient film technique(45%), gravel culture(6%), chaff charcoal culture(3%) and rockwool culture(3%). 2. Greenhouses were mostly made of pentite pipe frames and covered by polyethylene film, and culture beds were handy combination of cement blocks, concrete and styrofoam, which were not standard products. 3. Development of nutriculture system appropriate to our actual circumstances and improvement of establishments are required. 4. Since there was not farmhouse that performs the environmental measurement and environmental conditions of cultivation were very limited. sensor applied environmental control technology of nutriculture should be developed.

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A Fundamental Study on the Development of Irrigation Control Model in Soilless Culture (양액재배 급액제어모델 개발에 관한 기초연구)

  • 남상운
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.41 no.2
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    • pp.37-43
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    • 1999
  • This study was conducted to develop the simple and convenient irrigation control model which can maintain the appropriate rates of irrigation and drainage of nutrient solution according to the enviornmental conditions and growth stages in soilless culture of cucumber. In order to obtain fundamental data for development of the model, investigation of the actual state of soilless culture practices was carried out. Most irrigatioin systems of soillness culture were controlled by the time colock. Evapotranspiration of cucumber in soilness culture was investigated and correlations with environmental conditions were analyzed , and its estimating model was developed. In order to develop the irrigation system which can control the amount of nutrient solution applied according to seasons, weather conditions, and growth stages, a irrigation clock control was developed. Applicability of the model was tested by simulation. Drainage rates of nutrient solution controlled by conventional time clock, integrated solar radiation, and the developed model were 61% , 20%, and 32% , respectively in cucumber perlite culture.

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Effects of Substrates and Nutrient Supplying Methods on the Growth and Fruit Yield of Hydroponically Grown Cucumber Plants (배지의 종류 및 급액방법의 차이가 양액재배 오이의 생장과 수량에 미치는 영향)

  • 이정현;김홍기;이범선;정순주
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • pp.100-102
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    • 1995
  • 국내 양액재배 면적은 94년말 53.5ha로 90년의 8.1ha에 비해 급격히 확대되었으며, 이중 오이는 15.5ha로 36%를 점유하고 있다. 오이의 경우 펄라이트경이 58.4%로 고형배지경이 대부분을 차지하고 있는데 이는 근권환경의 안정성이 높아 재배의 위험성을 경감시킬 수 있기 때문으로 생각된다. 그러나 펄라이트의 경우 자체가 갖는 수분보유력은 크지만 입자 직경에 따라 배수성이 지나치게 커서 정식후 초기활착이 곤란해질 우려가 있으므로 금액방법의 적정화, 입자크기의 선택, 왕겨, 훈탄, 입상암면 등 다양한 이종배지를 이용한 혼합배지의 활용 등을 검토할 필요가 있는 것으로 알려지고 있다. (중략)

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Development of an Aeroponics-NFT(Nutrient Film Technique) Nutriculture System Using Microcomputer for Greenhouse Melon (마이크로컴퓨터를 이용한 온실멜론의 분무경 -박막순환식 양액재배 시스템 개발)

  • 유수남;서상룡;정종훈
    • Journal of Biosystems Engineering
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    • v.23 no.2
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    • pp.167-178
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    • 1998
  • An Aero-NFT nutriculture system using microcomputer for cultivation of greenhouse melon was developed and the performance of the system was evaluated through experiments. The system could control temperature, EC and pH of the nutrient solution within the error ranges of $\pm$ 0.2$^{\circ}C$, $\pm$ 0.2 mS/cm, $\pm$ 0.1 pH, respectively. The results of cultivation experiment showed that temperature, EC and pH of the nutrient solution were generally controlled within the setting ranges during cultivation period. The growth results were good until pinching, but the fruit quality of melons was not high except sweetness and shape. To optimize performance of the system, more techlical information for nutriculture of greenhouse melon was needed.

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Chemical Characteristics of Ground Water for Hydroponics and Waste Nutrient Solution after Hydroponics in Chungbuk Area (충북지역 양액 재배용 지하수 및 폐양액의 화학적 특징)

  • Lee, Gyeong-Ja;Kang, Bo-Goo;Lee, Ki-Yeol;Yun, Tae;Park, Seong-Gyu;Lee, Cheol-Hee
    • Korean Journal of Environmental Agriculture
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    • v.26 no.1
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    • pp.42-48
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    • 2007
  • This survey has been conducted to obtain basic data of the quality of ground water for hydroponics and waste nutrient solution after hydroponics in hydroponic farms in Chungbuk area. Ground water samples were collected and analyzed at 19 sites of hydroponic farms. Waste nutrient solution samples were analyzed at 15 sites selected of them. The values of several components in ground water for hydroponics were as follows. pH range was shown from 6.2 to 7.7 and the average was 6.8. EC range was shown from 0.10 to 0.45 dS $m^{-1}$ and the average 0.23 dS $m^{-1}$. $NO_3-N$ concentrations was ranged from 0.12 to 13.77 mg $L^{-1}$, $SO_4^{2-}$ concentrations was ranged from 1.84 to 63.01 mg $L^{-1}$ and $Cl^-$ concentrations were ranged from 10.46 to 72.09 mg $L^{-1}$. Average values of $NO_3-N$, $SO_4^{2-}$ and $Cl^-$ were 4.00 mg $L^{-1}$, 12.70 mg $L^{-1}$ and 27.57 mg $L^{-1}$, respectively. $Ca^{2+}$, $Mg^{2+}$ and $Na^+$ concentrations were ranged from 3.24 to 36.99 mg $L^{-1}$, 1.44 to 14.93 mg $L^{-1}$ and 6.12 to 25.25 mg $L^{-1}$, respectively. Average concentrations were 13.06 mg $L^{-1}$ in $Ca^{2+}$, 6.02 mg $L^{-1}$ $Mg^{2+}$ and 12.08 mg $L^{-1}$ in $Na^+$. In waste nutrient solution after hydroponics, pH range was shown from 4.3 to 8.8 and the average was 6.7. EC range was shown from 0.44 to 2.37 dS $m^{-1}$ and the average 1.15 dS $m^{-1}$. Range of $NO_3-N$, $PO_4-P$, $K^+$, $Ca^{2+}$, $Mg^{2+}$ and $Na^+$ in waste nutrient solution were $10{\sim}212$, $0.56{\sim}26.1$, $10{\sim}295$, $16{\sim}215$, $9{\sim}54$ and $10{\sim}53$ mg $L^{-1}$ respectively. Average concentration were 100 mg $L^{-1}$ in $NO_3-N$, 12.15 mg $L^{-1}$ in $PO_4-P$, 99 mg $L^{-1}$ in $K^+$, 78 mg $L^{-1}$ in $Ca^{2+}$, 26 mg $L^{-1}$ in $Mg^{2+}$ and 26 mg $L^{-1}$ in $Na^+$. Inorganic matters in waste nutrient solution after hydroponics was higher than that of ground water for hydroponics.