• Title/Summary/Keyword: Hydroponics

Search Result 352, Processing Time 0.034 seconds

The Selection of the Optimum Cherry Tomato Cultivar for Hydroponics (수경재배에 적합한 방울토마토의 품종선발)

  • 김영식
    • Journal of Bio-Environment Control
    • /
    • v.1 no.2
    • /
    • pp.175-180
    • /
    • 1992
  • Cherry tomatoes(Lycopersicon esculentum) were grown in circulating deep flow hydroponic system. The pH of the nutrient solution was increased and the EC was decreased with time. The clusters of ‘Mini Carol’ were branched severely, whereas those of ‘Chelsea Mini’ and ‘Popo’ were a little branched or not. The vegetative growth was similar between cultivars. But the yield of fruits was by far the largest in ‘Mini Carol’ compared to other cultivars, and not different between ‘Chelsea Mini’ and ‘Popo’. Internal qualities of fruits, like as sugar, sugar/organic acid, and vitamin C, are good in ‘Mini Carol’. As the result of panel test, ‘Mini Carol’ is good for softness, easeness of eating, toughness of skin and so on, so it is believed that ‘Mini Carol’ is the most acceptable to consumers in hydroponic culture.

  • PDF

A Study on Inactivation of Pathogenic Bacteria for Nutrient Solution Recycling Using Advanced Oxidation Processes

  • Jang, Gwan-Soon;Nam, Yi
    • Korean Journal of Soil Science and Fertilizer
    • /
    • v.50 no.5
    • /
    • pp.489-496
    • /
    • 2017
  • This study was conducted to test the applicability of hydroxy radical reactor system, which applied advanced oxidation processes, to sterilize pathogenic bacteria for nutrient solution recycling in closed hydroponics. Removal efficiency was tested on 25 L of nutrient solution maxed with 10 mL culture solution of bacteria, E. coli, and R. solanacearum in a pilot tank. The testing conditions included various levels of hydroxy radicals resulting from air flow rates of 40, 80, and $120L\;min^{-1}$, and 12 hours processing time. The removal of bacteria, E. coli, and R. solanacearum by hydroxy radical in nutrient solution was significantly increased with an increase in the flow rate of the air from $40L\;min^{-1}$ to $120L\;min^{-1}$. The optimum removal efficiency was achieved at an air flow rate of $120L\;min^{-1}$ for 2 hours treatment. There were no significant differences in removal efficiency among bacteria, E. coli, and R. solanacearum for tested level and time of hydroxy radical. These results verified the efficiency of hydroxy radical in removing the pathogenic bacteria and the applicability of hydroxy radical reactor system in the field.

Solid Culture Medium Selection Criteria for Hydroponics Farm Households (양액재배 농가의 고형배지 선택 기준에 관한 연구)

  • Kim, Dong-Seok;Kim, Dae-Young;Hwang, Jae-Hyun;Yun, Hoa-Young
    • Korean Journal of Organic Agriculture
    • /
    • v.22 no.4
    • /
    • pp.841-854
    • /
    • 2014
  • This study aimed to analyze the selection criteria and priority settings for solid culture medium used in hydroponic crop production in farm households. Expert brain storming was carried out to extract solid culture medium selection criteria for hydroponic farming. As a result, 3 criteria of economy (cost), productivity, and environment, and 9 factors were extracted. A questionnaire survey of hydroponic farm households was conducted in Gyeonggi, Gangwon, and Chooncheong provinces. AHP analysis of the hydroponic solid culture medium selection criteria identified productivity as the most important criterion, chosen by 58.7% of the respondents, followed by economy (28.4%) and environment (12.9%). The 9 factors were rated by the respondents in the following decreasing order of importance: 1, crop yield (28.3%); 2, pest occurrence (18.5%); 3, maintenance/management costs (12.0%); 4, convenience of maintenance/management (13.4%); 5, initial investment cost (11.6%); 6, material energy consumption (6.5%); 7, waste recyclability (4.0%); 8, waste disposal costs (3.4%); and 9 environmental emissions (1.81%). These results imply that hydroponic farm households consider cultivation-related quality factors more important than economic factors, such as price of culture medium or installation cost.

Effects of Shading on Photosynthetic Response and Growth Characteristics in Hydroponics for Wasabi Leaf Production (고추냉이 잎 수경재배시 차광정도가 광합성 특성 및 생육에 미치는 영향)

  • Lee, Joo-Hyun;Nasangargale, T.;Choi, Ki-Young;Lee, Yong-Beom
    • Journal of Bio-Environment Control
    • /
    • v.17 no.1
    • /
    • pp.9-13
    • /
    • 2008
  • The wasabi was planted in glasshouse to investigate the effect shade level (0, 10, 30, 70%) on growth and photosynthetic response. The net photosynthetic rate and stomatal conductance were the highest under 10% shading rate in greenhouse. The lowest transpiration rate was in the non-shading treatment. 70% shading rate significantly reduced in photosynthetic characteristics. The number of leaf was decreased with increasing of shading rate. Leaf and petiole weight was the highest 10% shading and then followed by the non-shading treatment. Number of leaves, leaf, petiole and total weight were severely declined in 70% shading treatment. Shading rate (0%, 10%, and 30%) did not significantly influenced on the leaf length, leaf width and root growth. 10% shading level was the most effective for wasabi leaf production in hydroponics.

Development of Optimum Nutrient Solution for Dill (Anethum graveolens L.) in Hydroponics (딜의 수경재배에 적합한 배양액 개발)

  • 여경환;이용범
    • Journal of Bio-Environment Control
    • /
    • v.6 no.4
    • /
    • pp.299-309
    • /
    • 1997
  • This experiment was conducted to determine the mineral absorption character and develop the optimum composition of nutrient solution for dill(Anethum graveolens L.) in hydroponics. Dill(Anethum graveolens L.) plants were grown in nutrient film technique(NFT) supplied with 1/4, 1/2, and 1 strength of the nutrient solution developed by National Research Station in Japan(HRS). Plants grown in 1/2 strength showed the best growth in plant height, fresh weight, and dry weight compared with those grown in 1/4 or 1 strength. In 1/2 strength solution, pH and EC changed little and proper nutrient contents were observed in the leaves as compared to plant nutrient diagnosis standard. Based on these results, optimum macronutrients were composed by nutrient- water absorption rate(n/w) with 1/2 strength: NO$_2$―N 8.85, NH$_4$―N 0.55, P 2.1, K 6.2, Ca 2.8, and Mg 1.7 me L$^{-1}$ To examine the suitability of the nutrient solution developed(SCU) , dill plants were grown in NFT supplied with two different kinds of solution and concentration. 1/2, 1, 3/2 and 25 of SCU and 1/2S of HRS. Changes of pH and EC were not distinct in 1S, but a significant change of pH was shown in low concentrations-HRS 1/2S and SCU 1/2S. Shoot fresh and dry weight were much higher in the plants grown in SCU IS as compared with HRS 1/2S. There were no significant differences in growth of plants grown in SCU IS, 3/2S, and 25. In addition, nutrient contents in the leaves grown by SCU 1S were in proper levels as compared with plant nutrient diagnosis standard. SCU 1S developed in this experiment was found to be optimum for dill in hydroponics.

  • PDF

Analysis of Domestic Patent Information on Hydroponics Field (수경재배 분야의 국내 특허 정보 분석)

  • Yu, Sung-Oh;Bae, Jong-Hyang;Park, Yun-Jum;Cho, Ja-Yong;Jang, Hong-Gi;Heo, Buk-Gu
    • Journal of Bio-Environment Control
    • /
    • v.16 no.1
    • /
    • pp.13-20
    • /
    • 2007
  • This study was conducted to collect the basic data fo the development ot hydroponic technique and the efficient promotion of water culture. We have also analysed the water culture associated domestic patent application informations searching for on-line internet site with an admission fee (http://www2.wips.co.kr) from the year 1983 to January, 2006. Fifty nine patent applications related to the hydroponics were searched for in this study. Main patent contents applied were as followed in the order of that nineteen applications about the hydroponic equipments by 32.2%, thirteen applications about the materials used in water culture by 22.0%, eleven applications about the composition of nutrient solution by 18.6%, nine applications about the cultural methods by 15.3%, and seven applications about the cultural media by 11.9%. The compositions of nutrient solution and the cultural methods intended for specific crops were increased in number following five applications about tomato plants and four applications about potatoes. Thirty three patents (55.9%) were mainly applied before the year 2000. Main patent contents were the compositions of nutrient solution before the year 2000 in contrast to the cultural methods and substrates after the year 2000.

Response of Nutrient Solution and Photosynthetic Photon Flux Density for Growth and Accumulation of Antioxidant in Agastache rugosa under Hydroponic Culture Systems (식물공장에서 양액의 종류 및 PPFD가 배초향의 생장 및 항산화 물질에 미치는 영향)

  • Kim, Sung Jin;Bok, Kwon Jung;Lam, Vu Phong;Park, Jong Seok
    • Journal of Bio-Environment Control
    • /
    • v.26 no.4
    • /
    • pp.249-257
    • /
    • 2017
  • Agastache rugosa, is a perennial medicinal plant commonly used in Chinese herbalism, and may have anti-atherogenic and antibacterial properties. Here in this study, we investigated the growth and variations in antioxidant contents of A. rugosa in response to nutrient solution and photosynthetic photon flux density (PPFD) with artificial lighting for a hydroponics culture. Fluorescent light at 150, and $200{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PPFD with a 16/8 (light/dark) photoperiod, combined with four different nutrient solutions [developed by Horticulture experiment station in Japan (HES), University of Seoul (UOS), Europe vegetable research center (EVR), Otsuka-house 1A (OTS)], were used in a hydroponics culture system for 6 weeks. The shoot and root dry weights of A. rugosa grown with the OTS were significantly higher than those of other nutrient solutions. The amount of tilianin was the highest grown with the OTS, followed by EVR, HES, and UOS. Total acacetin content was the highest in A. rugosa grown under EVR which was statistically similar with OTS. The A. rugosa grown under $200{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PPFD produced higher fresh weight and both acacetin and tilianin contents than that grown under $150{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PPFD. The present results suggested that OTS along with $200{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PPFD could be an optimum growing condition for better growth and higher accumulation of tilianin and acacetin contents in A. rugosa with hydroponic culture systems in a plant factory.

Effects of Compost Leachate and Concentrated Slurry on the Growth and Yield of Tomato(Lycopersicum esculentum Mill.) in Hydroponic Culture (퇴비단 여과액비와 농축액비를 이용한 양액재배가 토마토(Lycopersicum esculentum Mill.)의 생육 및 수량에 미치는 영향)

  • Ryoo, Jong-Won;Seo, Woon-Kab
    • Korean Journal of Organic Agriculture
    • /
    • v.17 no.3
    • /
    • pp.357-370
    • /
    • 2009
  • This experiment was conducted to investigate the effects of compost leachate and concentrated slurry on growth of tomato in hydroponic culture. In process of composting, compost leachate was produced water was through a saturated compost heap. The concentrated slurry was produced by filtration and concentration by membrane process. Filtration of pig slurry was necessary to prevent the hose clogging in hydroponics culture. The treatments of this experiment were consisted of seven different liquid fertilizers; compost leachate(CL), concentrated pig slurry (CS), compost leachate+byproduct(CL+BP), concentrated pig slurry+byproduct(CS+BP), compost leachate 50%+nutrient solution50%(CL+NS), concentrated pig slurry 50%+nutrient solution50%(CS+NS) and nutrient solution(NS) for tomato based on nitrogen content. The chemical nutrient solution was the solution of National Horticulture Research Station for the growth of tomato. The concentration of nutrient solution was adjusted a range of $1.6{\sim}2.0 mS/cm$ in EC. 1. The compost leachate and concentrated pig slurry were low in phosphorus(P), calcium(Ca), magnesium(Mg), but rich in potassium(K). 2. Plant height, SPAD value of tomato was highest in the plot of CS+NS, intermediate in CL, CS+BP, and lowest in 100% concentrated pig slurry. 3. The tomato yield of compost leachate plot was 91% compared with inorganic nutrient solution. The compost leachate solution could be used as a nutrition solution of tomato in organic hydroponics. 4. The growth including plant height, SPAD value, fruit number, fruit weight and yield of tomato in the CL 50%+NS 50% was similar in the control. In conclusion, the mixture solution of 50% pig slurry and 50% nutrient solution could be used as a nutrition solution of tomato hydroponic culture.

  • PDF

Effects of pinching frequency on the growth of four carnation cultivars in hydroponics (카네이션 양액재배시 적심횟수에 따른 품종별 생육반응)

  • 정향영;김형득;최성렬;김태익;신학기;고재영;김수련
    • Proceedings of the Korean Society for Bio-Environment Control Conference
    • /
    • 1998.10a
    • /
    • pp.103-106
    • /
    • 1998
  • 카네이션에서 적심은 분지수를 늘려 종묘비를 절감하고 개화기를 조절하는데 많이 이용되고 있다. 적심횟수는 1회, 1.5회, 2회의 방법이 있으며 농가에서는 주로 1.5회를 이용하고 있다. 양액재배는 토경재배에 비해 생장속도가 빨라 개화가 빠른 것으로 일반적으로 알려져 있고 양액재배에 적합한 품종 역시 숙기가 빨라 2회 채화가 가능하거나 숙기가 늦은 품종, 절화장이 짧은 품종, 분지력이 좋은 품종이 유리한 것으로 알려지고 있다. (중략)

  • PDF

Growth characteristics of carnation cultivars in hydroponics (카네이션 양액재배시 품종별 생육반응)

  • 정향영;김형득;최성렬;김태익;신학기;고재영;김수련
    • Proceedings of the Korean Society for Bio-Environment Control Conference
    • /
    • 1998.10a
    • /
    • pp.107-110
    • /
    • 1998
  • 카네이션 품종은 200여종의 다양한 원종을 이용하여 품종을 만들었기 때문에 품종별 생리도 아주 다르며 양액재배를 했을 때는 더욱 다른 품종별 생육반응을 나타낸다. 그러므로 품종별 생육반응을 검토하기 위해 국내외에서 많이 재배되고 있는 품종, 화색과 화형을 달리한 품종과 원예연구소에서 육성한 품종 및 계통을 시험재료로 하여 순환식 양액재배를 실시하였다. (중략)

  • PDF