• Journal of Bio-Environment Control
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• v.1 no.2
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• pp.169-174
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• 1992

This experiment was carried out to investigate the possibility of practical use of intermittent soaking system(ISS) in hydroponicaly growing tomato. There were four treatments which were NFT, Aeroponics, and ISS with 10 and 15 minute soaking intervals. 1. Plant height is highest in NFT, but main root length is longest in ISS. While stem diameter and leaf number were not significantly difference. 2. Fresh and dry weight were heavier in NFT than those of other systems at early growth stage, but the heavier in ISS system, the growth more develop. 3. In 43 days after treatment, the number of flowerlet was largest in aeroponics, and then ISS and NFT in order. Fruit weight per plant was also heaviest in aeroponics. 4. Average yield per plant were 1929.1g in aeroponics, 1475.2g in ISS with 10 minute soaking interval, 1276.2g in NFT and 1084.8g in ISS with 15 minute soaking interval. 5. Average fruit number per plant were 11.0 in aeroponics, 9.7 in NFT, 8.3 in ISS with 15 minute soaking interval, and 7.7 in ISS with 10 minute soaking interval. Average fruit weight were 192.9g in aeroponics, 172.4g in ISS with 10 minute soaking interval, 134.0g in NFT and 126.0g in ISS with 15 minute soaking interval. 6. Average fruit length was longer in aeroponics and ISS with 10 minute soaking interval than in the NFT and ISS with 15 minute soaking interval. Average fruit width was similarly wider in NFT, aeroponics and ISS with 10 minute soaking interval than in ISS with 15 minute soaking interval.

• Journal of Bio-Environment Control
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• v.6 no.3
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• pp.198-204
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• 1997

This study was conducted to investigate the effect of solution culture systems on growth and mini-tuber yields of hydroponlcally grown potato (Solanum tuberosun L. cv. Dejima). The growth of stem and foliage at 40 and 60 days after planting were better in aeroponics system than the other systems, and stem length and number of stems per plant at 90 days after planting were the greatest as of 65.4 cm, 7.3 in aeroponics and the lowest as of 49.5 cm, 3.2 in scoria media system. Stolon length was the longest as of 30.4 cm in aeroponics at 90 days after planting, and number of stolons was the greatest as of 10.5 in NFT. Number of mini-tubers per plant at 90 days after planting was 67.1, 62. 5, 20.1 and 18.0 in aeroponics, NFT, perlite and scoria media, respectively. The perlite media system made the fewest enlargement of lenticels of mini-tubers. The results indicate that aeroponic system can be used effectively for mini-tuber potato production.

• Journal of Bio-Environment Control
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• v.24 no.4
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• pp.281-286
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• 2015

This study was carried out to investigate the effects of cultural systems on growth, vitamin C, amino acid content, and yield of Peucedanum japonicum grown in artificial light plant factory. Treatments were given with Nutrient Film Technique (NFT), Medium (Perlite), and Aeroponics. Plant height was the highest in NFT system as 10.2cm, and was the shortest in Perlite as 8.9cm. Fresh leaf weight was the high in order of Perlite, NFT, and Aeroponics. Total phenolic compounds was different from cultural systems in order of Aeroponics as $117.84mg{\cdot}100g^{-1}\;GE$, NFT as $98.57mg{\cdot}100g^{-1}\;GE$ and Perlite as $74.62mg{\cdot}100g^{-1}\;GE$. Total flavonoid content of Aeroponics is $0.12mg{\cdot}100g^{-1}$ but that of NFT and Perlite treatments is not detected. Vitamin C content in Aeroponics as $108.23mg{\cdot}100g^{-1}$ was significant different from Perlite as $88.05mg{\cdot}100g^{-1}$ as and NFT $80.83mg{\cdot}100g^{-1}$. Total dietary fiber content was higher Aeroponics than Perlite and NFT. Cystein content was the highest in Aeroponics as $46.76mg{\cdot}100g^{-1}$ and methione content was the lowest in Perlite as $75.64mg{\cdot}100g^{-1}$. Mineral content of leaves was high in order of K, Ca, P and Mg in all treatments.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.62 no.1
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• pp.60-65
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• 2017

This study was conducted to dentify the optimum plantlet type of 'Solara' potatoes (Solanum tuberosum L.) for growth in an aeroponics system. Plantlets of 'Solara' were transplanted on March 16, 2015 in a greenhouse, and growth and yield characteristics were investigated at 70 and 78 days after transplanting, respectively. Stem length was shorter in plantlet of 15-day-old stem cuttings and acclimatization of culture, and the stem length of plantlets of stem cuttings tended to increase with increasing stem cutting age. The fresh weight of plants was the highest in the plantlets of 40-day-old stem cuttings and the lowest in non-rooted stem cuttings and acclimatization of culture. The highest number of first stolons was obtained in 35-day-old stem cuttings. The number of second stolons was the highest in plantlets of 35-day-old stem cuttings, acclimatization of culture, and 30- day-old stem cuttings. The total number of tubers was higher in plantlets of 35-day-old stem cuttings and acclimatization of culture, and the number of tubers above 3 g was the highest in plantlets of 35-day-old stem cuttings. The weight of tubers above 3 g was the heaviest in plantlets of 35-day-old stem cuttings(1,947 g per 10 plants), followed by plantlets of 30-day-old stem cuttings. These results indicate that plantlets of 30 to 35-day-old stem cuttings could be the best for production of 'Solara' potato tubers in an aeroponics system.

• Journal of Bio-Environment Control
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• v.18 no.2
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• pp.107-111
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• 2009

This experiment was conducted to select optimum hydroponic systems for clean and mass production for shoot and root of Echinacea. E. purpurea and E. angustifolia. were grown at 5 different kinds of hydroponic systems; NFT, modified NFT, DFT, aeroponics, and Ebb & Flow for 150 days. The lowest photosynthetic rate and transpiration rate were in Ebb & Flow system in E. purpurea and E. angustifolia at 120 days after transplanting. The shoot fresh and dry weight were high in aeroponic and DFT system of E. angustifolia and in aeroponic and NFT system of E. purpurea at 150 days after transplanting. The root fresh and dry weight of both species were the highest in aeroponic system and next to modified NFT system. They were increased in NFT and Ebb & Flow system for the root length and in aeroponic system for the number of tillering. The results demonstrate that aeroponic system was the most effective for enhancement shoot and root biomass of Echinacea spp. in hydroponics.

• Journal of Bio-Environment Control
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• v.16 no.1
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• pp.1-6
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• 2007

This experiment was conducted to possibility for leaf production of wasabi using hydroponics system. When they were grown in aeroponics and soiless culture such as saprolite and Coir, photosynthesis and transpiration rate were high and marketable yield $(leaf\;width\;11{\sim}13cm)$ showed $11.2{\sim}11.7$ of leaf number per plant and $52{\sim}53.8g$ fresh weight. In spring periods, the highest yield was 25.7 of leaf number per plant in nutrient solution of Yamasaki's solution developed in Japan in deep culture during 130 days. It showed be possibility that marketable leaves harvested one leaf every $2{\sim}4$ days though spring and fall culture periods using hydroponics controlled in environmental culture.

• 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.

• Journal of Bio-Environment Control
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• v.17 no.4
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• pp.261-265
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• 2008

This study was carried out to investigate the effects of stem cutting ages and harvest time on the growth and yield of potato 'Dejima' in aeroponics. The stem cuttings were produced from in vitro plantlets and transplanted into an aeroponic system with 20, 30, 40 and 50 day-old stem cuttings (DOS). Tubers were harvested 60, 70, 80 and 90 days after transplanting (DAT) and sorted into following categories: $1{\sim}5$, $5{\sim}10$, $10{\sim}20$, $20{\sim}30$, $30{\sim}40$ and over 40 g. Plant height from the 40 DOS was the highest during the growing periods but no significant difference was observed on 75 DAT. The tuber weight increased until 90 DAT with the greatest weight of tubers in the 20 and 40 DOS. However, there was no significant difference among 20, 30 and 40 DOS in the number and weight of tubers. Harvesting at 80 and 90 DAT increased the number of tubers over 5 g, which are usually considered as appropriate for direct field planting.

• Journal of Life Science
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• v.32 no.4
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• pp.298-302
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• 2022

Sulforaphane is a sulfur-containing substance found in large amounts in cruciferous plants and has been reported in several studies to have anticancer effects. Kale is a representative cruciferous plant known as a superfood and is widely used as an ingredient in various dishes. In this study, in order to investigate a cultivation method for increasing kale's content of sulforaphane, kale was treated with geraniol or methyl jasmonate and water stressed during cultivation using a aeroponic culture system in a fully enclosed plant factory. Geraniol or methyl jasmonate were sprayed on the kale's leaf surface once a day for 2 days, and water deprivation stress was conducted for 3 days after 7 days from first treatment day. No difference in growth between control, geraniol, methyl jasmonate treated groups were observed during cultivation. The study results showed that the kale sulforaphane content increased by 60% in the group treated with geraniol compared to the control group and that the group treated with water deprivation stress in addition to geraniol showed a significant increase of 414%. These results show that kale with an increased content of sulforaphane can be grown and that geraniol can be a good research material for increasing the content of functional substances in plants.

• Journal of Bio-Environment Control
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• v.6 no.4
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• pp.284-291
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• 1997

This study was conducted to evaluate the optimum hydroponic system and nutrient solution for shortening the early growth period and quality improvement of dendrobium ( Dendrobium Phalaenopsis) seedlings. Dendrobium seedlings with 3 to 4 leaves were transplanted in the deep flow technique(DFT) system, aeroponic system, and ebb and flow system with different concentration of balanced nutrient solutions recommended by the Japanese Horticultural Experiment Station. Growth characteristics of shoot and root were recorded and evaulated among treatments. For autumn cultivation, plant height was the longest at the DFT system with quarter concentration of nutrient solution, where aeroponic system with half concentration of nutrient solution. Aeroponic system stimulated the root growth but fresh weight was observed in the plots of DFT system. For spring cultivation, pH values increased up 7.5 at the DFT and aeroponic system, where EC values did not fluctuate regardless of cultural system. Ebb and flow system showed the best result in the growth of plant followed by BFT system and aeroponic system. Higher concentration of nutrient solution within this range of treatment was recommended for the growth promotion of leaf length and width in DFT system. In conclusion, growth responses differed depending on the cultural system, concentrations of nutrient solutions and duration of cltivation.