• Title, Summary, Keyword: Hydroponics

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A Study on Implementation of Hydroponics Automation System using Adaptive Fuzzy Control (적응 퍼지 제어기를 이용한 수경재배 자동화를 위한 연구)

  • 노명균;김승우;홍상은
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • pp.111-114
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    • 1996
  • Hydroponics is to grow plants, not in soil but in water which the quantity of necessary chemical food can be controlled. In this paper, this is designed in the automatic system. The closed culture reduces cost of production and produces a many kinds of agricultural products in a confined place. An adaptive fuzzy control in the best method to solve and to overcome parametric uncertainties and non-linearity of the controlled system. A hydroponics automation system which is able to overcome these control problems. It is used in implementation of the hydroponics automation system. The performance is analyzed through an experiment in which the new adaptive fuzzy control method is applied to the automatic control of tomato hydroponics.

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Effect of Using Waste Nutrient Solution Fertigation on the Musk Melon and Cucumber Growth (페양액을 이용한 관비재배가 머스크 멜론과 오이의 생육에 미치는 영향)

  • Zhang, Cheng-Hao;Kang, Ho-Min;Kim, Il-Seop
    • Protected Horticulture and Plant Factory
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    • v.15 no.4
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    • pp.400-405
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    • 2006
  • Waste nutrient solution(WNS) using non-recycled hydroponics for melon increased contents of $NO_3$-N and cataions, such as, Ca, K, while anions except $NO_3$-N were decreased slightly as the musk melon plants grew. pH and EC of WNS were maintained 5.7$\sim$7.0, 2.0$\sim$2.2 $dS{\cdot}m^{-1}$, respectively. The musk melon plants cultivated by fertigation using WNS showed longer plant height and root length, and higher chlorophyll content than that grown by hydroponics. The fruit weight of musk melon grown by fertigation using WNS were 417.1 g heavier than that cultivated by hydroponics and soluble solids contents of musk melon fruit cultivated by fertigation using WNS was $13.3^{\circ}Brix$, that was $1.4^{\circ}Brix$ higher than that grown by hydroponics. While the growth of cucumber plants and size of cucumber fruits were not different between in fertigation using WNS and hydroponics, total yields and marketable fruit percentage showed more in fertigation using WNS than in hydroponics.

Composition of Nutrient Solution for Endive(Cichorium endivia L.) Hydroponics (엔디브 양액재배에 적합한 배양액 조성)

  • 조영렬;이용범
    • Protected Horticulture and Plant Factory
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    • v.7 no.2
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    • pp.123-129
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    • 1998
  • This experiment was conducted to composition of nutrient solution for tore of endive hydroponics, and was compared the nutrient solution developed in the Seoul City University(SCUE) with the conventional solution of Proefstation voor Tuinbouw ender Glas. Proper compositions of nutrient solution for endive hydroponics were NO$_3$-N 15.0, NH$_4$-N 1.0, PO$_4$-P 3.0. K 10.0, Ca 5.0 and Mg 3.5 me.$\ell$$^{-1}$ , respectively SCUE and PTG standard nutrient solution showed slightly better yields among nutrient solutions. The SCUE nutrient solution and the PTG nutrient solution had no difference on growth and yield of endive Plants.

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A Study on the Culture Media Control of Smart Plant Cultivator (스마트 식물 재배기의 양액 제어에 관한 연구)

  • Jeong, Sang-Hwa;Yoon, Chung-Man
    • Journal of the Korean Society of Manufacturing Process Engineers
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    • v.18 no.4
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    • pp.87-92
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    • 2019
  • In this paper, a closed hydroponics device was designed and fabricated to grow and harvest plants in a small space for safe consumption, which enables horticultural activities that are difficult to perform due to space constraints from urbanization. This device also aimed to minimize the air pollution of crops. To obtain data for the optimal growth conditions for crops in this intelligent plant-growing system, sensors were used to measure and control the growth conditions. To investigate the optimal growth conditions, blue lettuce and crown daisy were selected as representative crops. The growth rates were comparatively analyzed through four experiments for each plant. This hydroponics device was used to collect data on growth rates that are altered depending on cultivation conditions, which can then be used to study methods to control the growth rate of crops.

Effects of Concentrated Pig Slurry Separated from Membrane Filter and Several Environment-Friendly Agro-Materials Mixtures on the Growth and Yield of Lettuce (Lactuca sativa L.) in Hydroponics (막분리 돈분농축액비와 몇가지 친환경농자재의 혼합액이 수경재배에서 상추의 생육과 수량에 미치는 영향)

  • Ryoo, Jong-Won
    • Journal of Animal Environmental Science
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    • v.16 no.1
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    • pp.51-60
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    • 2010
  • This experiment was conducted to investigate the effects of concentrated pig slurry separated from membrane filter and by environment-friendly agro-materials mixtures on growth of lettuce in hydroponics. The swine waste treatment system having a ultra filtration and a reverse osmosis process was designed in this study. Filtration of pig slurry was necessary to prevent the hose clogging in hydroponics. Primary separation using ultra filter was followed by concentration by RO (Reverse Osmosis). The concentrated pig slurry (CS) was mixed by five different environment-friendly agro-materials mixtures. The chemical nutrient solution was the solution of National Horticulture Research Station for the growth of lettuce. The concentration of nutrient solution in hydroponics was adjusted a range of 1.5 mS/cm in EC. The concentrated pig slurry was low in phosphorus(P), suspended solid and heavy matal, but rich in potassium (K). The concentrated slurry was lowest in the growth characteristics of leaf lettuce. And also SPAD value in leaf was reduced in plot treated with concentrated slurry. But the growth of lettuce in the mixtures plot (CS+BM+AA, CS+BM+AA+SW) in hydroponics was significantly high compared to concentrated slurry. The fresh yield of lettuce was 78, 84% that of nutrient solution as 131.9, 142.2g in plot of CS+BM+AA and CS+BM+AA+SW, respectively. Our studies have shown that it is possible to produce organic culture using concentrated slurry and environment-friendly agro-materials mixture, although growth is slower than when using a conventional inorganic hydroponic solution.

Growth, Vitamin C, and Mineral Contents of Sedum sarmentosum in Soil and Hydroponic Cultivation (토경 및 수경재배에서 돌나물의 생육, 비타민 C와 무기성분 함량 변이)

  • Lee, Seung-Yeob;Kim, Hyo-Jin;Bae, Jong-Hyang
    • Horticultural Science & Technology
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    • v.29 no.3
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    • pp.195-200
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    • 2011
  • The growth, yield and quality of Sedum sarmentosum between soil and hydroponic cultivation were compared to produce high-quality shoots in summer season. The plants were collected from four places in Korea and cultivated in a plastic film house with 50% shading. A 1:1:1 mixtures of sand, upland soil and substrate (N-P-K: 330-220-400 $mg{\cdot}L^{-1}$) was used for soil cultivation, and a nutrient film technique (NFT) with Yamazaki-lettuce nutrient solution used for hydroponics. After 30 days of cultivation, plant height ranged from 18.4 to 21.8 cm and showed no significant difference between soil and hydroponic cultivation. Number of shoot, leaf length, leaf width, number of leaf, fresh weight, and dry weight significantly increased in hydroponics compared to those in soil cultivation. Fresh and dry weights in hydroponics were greater in 'Gunsan' and 'Wando' collections than those in other collections. Stem diameter and compression-force significantly increased in soil cultivation rather than hydroponics with significant differences among collections. However there were no significant differences in shoot bitterness and vitamin C content between cultivation methods or among the collections. Most mineral contents except Fe in hydroponics were higher than those in soil cultivation. K, Na, Zn contents in hydroponics were over 2 times higher than those in soil cultivation.

A Study on Utilization of Medicinal Herb as Vegetable by Hydroponics I. The effect of light and temperature on the seed germination of medicinal herb. (식물공장 시스템을 이용한 약초의 채소화에 관한 기초연구 1. 채소화가능 약초종자의 발아에 미치는 온도 및 광의 영향)

  • 최성규
    • Korean Journal of Plant Resources
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    • v.7 no.2
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    • pp.137-141
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    • 1994
  • In order to establish utilijzation of medicinal herb as vegetable by Hydroponics, the present studies were conducted to investigate the effect of temperature and light on the seed germination ofmedicinal herb. The results obtained are summaried as follows. The lower and upper temperaturelimit for herb germination was 10'c and 30'c within which the optimum was 20'C. Germinationof medicinal herb was similar in light and dark condition.

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Effects of Culture Type and Inoculation Quantity in Bioreactor on Production of Potato Plantlets

  • Choi Ki Young;Son Sung Ho;Lee Joo Hyun;Lee Yong-Beom;Bae Jong Hyang
    • Protected Horticulture and Plant Factory
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    • v.14 no.4
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    • pp.298-301
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    • 2005
  • Potato (Solamum tuberosum 'Dejima') plantlets were investigated on culture type and initial quantity of inoculation in bioreactor and survival rate by hydroponics for mass production. rode stems (1 to 1.5cm in length) of potato plantlets multiplied in vitro were grown for 3 weeks in liquid Murashige and Skoog (MS) medium with sucrose $30 g\; L^{-1}$. When plantlets (80-node inoculation) were raised in 10L balloon type bubble (BB) bioreactor, the healthiest growth of plantlets was obtained from explants cultured in ebb & flow culture with medium supplied periodically 12 times per day. The suitable inoculation quantity of 20L BB bioreactor was 120 pieces of stem segments (mean 2.2g fresh weight) in ebb & flow culture. Number of nodal shoot was eight on the average. In controlled culture room, survival rate of plantlets at 7 days after stem cutting was above $70\%$ when they were acclimatized by hydroponics grown in deep flow and solid medium culture. The highest survival rate of the stem cutting plantlets was in nutrient solution adjusted to EC $1.4dS{\cdot}m^{-1}$. Stem cutting plantlets through one culture could be obtained $670\~900$, when plantlets were grown in ebb & flow culture during 3 weeks using a 20L bioreactor with initial 120 pieces of nodal segments. 11 is possible In do mass production of seedlings cultured in bioreactor and hydroponics.

Growth and Ginsenoside Content of One Year Old Ginseng Seedlings in Hydroponic Culture over a Range of Days after Transplanting (수경재배 시 1년생 묘삼 이식 후 경과일수에 따른 인삼의 생육 및 Ginsenoside 함량)

  • Jeong, Dae Hui;Lee, Dae Young;Jang, In Bae;Yu, Jin;Park, Kee Choon;Lee, Eung Ho;Kim, Young Jun;Park, Hong Woo
    • Korean Journal of Medicinal Crop Science
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    • v.26 no.6
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    • pp.464-470
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    • 2018
  • Background: Ginseng produced by hydroponics can be cultivated without using agricultural chemicals; thus, it can be used as a raw materials for functional foods, medicines, and cosmetics. This study aimed to determine the optimal harvesting time to obtain the highest levels of ginsenoside and ginseng, as this was not previously unknown. Methods and Results: One-year-old organic ginseng seedlings were transplanted and cultivated using hydroponics for 150 days in a venlo-type greenhouse, using ginseng nursery bed soil and a nutrient solution ($NO_3{^-}-N$; 6.165, P; 3.525, K; 5.625, Ca; 4.365, Mg; 5.085, S; $5.31mEq/{\ell}$). Ginsenoside content and fresh and dry weights were higher at 120 days after transplanting than at 30, 60, 90, and 150 days. Total ginsenoside content was 11.86 times higher in the leaf and stem than in the root at 120 days after transplanting. Ginsenosides F1, F2, F3, and F5 were detected in ginseng leaves and stems. These chemical compounds are known to be effective in altering skin properties, including whitening, anti-inflammation, and anti-aging. Conclusions: Optimal harvesting time for ginseng cultivated using hydroponics was 120 days after transplanting when the biomass and ginsenoside content were highest.