• Title/Summary/Keyword: Hydroponics

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Comparison of Generated Loads by Hydroponics of Strawberry, Tomato, and Paprika in Gyeongsangnam-do (경남지역 딸기, 토마토, 파프리카 양액재배에 따른 발생부하량 비교)

  • Cho, Hyun Kyung;Kim, Sang Min
    • Journal of The Korean Society of Agricultural Engineers
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    • v.63 no.5
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    • pp.73-81
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    • 2021
  • The objective of this study was to analyze the waste nutrient generation loads from hydroponics for three major crops in Gyeongsangnam-do. Study hydroponic farms were selected for the three major crops such as paprika, strawberry, tomato based on the agricultural statistics data and field investigation. The flow amount and water quality for inflow and outflow of study hydroponic farms were monitored and analyzed on a monthly basis. Monitored samples were analyzed in terms of DO, BOD, T-N, T-P, SS, and EC. The generated load of BOD, T-N, and T-P were calculated from the monitored flow and water quality. The monitoring results showed that the drainage ratio for the circular hydroponic farm was lower than the non-circular hydroponic farm because the outflow from the circular hydroponics were much lower than that from the non-circular. The generated load calculation results showed that the BOD tended to have a smaller value than the TMDLs guideline for land, while T-N and T-P showed higher value than that from the TMDLs guideline. In order to effectively manage the pollutant load discharged from the hydroponics farming complex, it is necessary to manage the non-circulating hydroponics farm. To improve water quality, it is necessary to gradually expand the circulating hydroponics farm through policy and economic support.

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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    • 1996.10a
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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
    • Journal of Bio-Environment Control
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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
    • Journal of Bio-Environment Control
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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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Growth of Non-Powered Hydroponics Equipment and Quality Characteristics according to Post-Harvest Packaging by Cultural Methods on Leaf Lettuce (무동력 수경재배 장치의 상추 생육과 수확 후 포장에 따른 품질 특성)

  • Jung-Soo, Lee
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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    • v.28 no.3
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    • pp.231-236
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    • 2022
  • The research was aimed to improve pre-harvest methods to maintain marketability in postharvest leaf lettuce. In this study, the effect of hydroponics on the growth and post-harvest storage characteristics of 'Chongchima' lettuce grown in peat mass medium hydroponic system using a non-powered culture device or deep water culture (DWC) was evaluated. There was no difference in fresh weight, leaf number, SPAD, moisture content, and C/N ratio between peat moss growing medium hydroponic and DWC methods except plant height. It was found that lettuce cultivation by a nonpowered hydroponics method is easier than the existing DWC. The quality parameters, such as fresh weight loss, SPAD value, and general appearance of lettuce were investigated after harvest. There was no significant difference in fresh weight loss and general appearance during storage of lettuce by the hydroponics methods. However, with the increased storage time of SPAD, which is related to chlorophyll content, was slightly higher in peat moss medium hydroponic was than DWC. When crops such as lettuce are grown under favorable conditions without any agronomic abnormalities, it is suggested that post-harvest storage is not significantly affected by peat moss growing medium hydroponic and DWC.

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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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.

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.

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.

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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