• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1999.11a
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• pp.169-173
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• 1999

90년대에 접어들면서 전국적으로 시설 토마토 재배면적은 빠르게 증가하고 있으나 그에 따른 재배 기술의 향상은 미흡하여 일부 품질이 저하되는 문제점을 안고 있다. 생활 수준의 향상과 더불어 토마토에 대한 소비자의 기호도가 다양화되면서 토마토의 선택 기준이 색택 이나 모양 등의 외적 품질에서 맛을 중시하는 내적 품질로 바뀌었다. 특히 당도가 중요한 선택 기준이 되고 있다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2003.10a
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• pp.152-157
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• 2003

• Journal of Bio-Environment Control
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• v.32 no.1
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• pp.86-86
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• 2023

• Journal of Bio-Environment Control
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• v.18 no.4
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• pp.425-430
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• 2009

This experiment was investigated to select suitable cultivars for the hydroponics of sweet pepper in the alpine area in summer. Sweet pepper plants were grown in the greenhouse in Jinbu (550m above sea level), Pyungchang, Korea. Seeding and transplanting of the 12 sweet pepper cultivars were done in February and April, respectively. The sweet pepper fruits were harvested every week from July to November. Seven cultivars were chosen from the 12 tested cultivars. 'Special' and 'Cupra' for red, 'Boogie', 'Fellini' and 'President' for orange, and 'Fiesta' and 'Derby' for yellow had more fruit sets, the more percentage of standardized products for the export to Japan, and higher yield than the other cultivars. This result has shown various characteristics among or within the cultivars. This study would provide the basic database of cultivars and give the information about control vegetative and reproductive growth to the farmers cultivating sweet pepper.

• Journal of Bio-Environment Control
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• v.18 no.4
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• pp.420-424
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• 2009

This experiment was executed to investigate the effect of the carpenter bee as a pollinator on the fruit set increment of sweet pepper in summer hydroponics in the alpine area of Gangwon province, Korea. Where the number of fruit sets were increasing during the treatment of pollination by the carpenter bee, total yields during the whole growing period were not different. The number of seeds per fruit in the treatment of the carpenter bee increased more than that in the control by 7.3 percent increment, but the percentage of blossom-end rot increased. As fruit weight range of SS size (below 120g) decreased and that of L size (from 181g to 210g) increased by the pollination treatment, so the percentage of standardized products for the export to Japan improved. Therefore this result was effective for the fruit production of high quality for the export to Japan and it will be necessary for further study on the method of reducing blossom-end rot to be done.

• Journal of Bio-Environment Control
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• v.8 no.2
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• pp.115-124
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• 1999

This study was conducted to determine the optimum root zone environment condition and proper nutrient management system for lettuce in hydroponics. For the root zone environment condition, several level of pH and electrical conductivity (EC) were treated respectively. Though all the level of pH 4 to pH 8, except pH 3, performed better growth without any visible physiological disorder, the optimum pH of the nutrient solution for lettuce production was pH 5.5 to 6.0. The optimum ionic strength of the solution was EC 1.2 to 1.6 mS $cm^{-1}$ / because higher nutrient level caused tip burn symptom by calcium deficiency. Considering the above results, it is concluded that lettuce can be efficiently mass-produced through the optimum root zone environment.

• Korean Journal of Plant Tissue Culture
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• v.24 no.2
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• pp.83-86
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• 1997

To produce and supply the healthy potato, basic seed potatoes were produced by stem cutting, microtuberization and hydroponic culture. The total number of tubers and the total tuber weight per $\textrm{m}^2$ of potato were more in hydroponic culture as each products were 1, 152 and 4, 492g than in the stem cutting (75 and 4, 136g) or microtuberization (1, 080 and 1, 080g) using petridishes. The total yield per 10a in the field was propagated highly stem cutting > propagated microtubers > hydroponics > microtubers. The number of tubers per 10a produced by hydroponics (33, 064) was higher than any other methods. This indicated the hydroponic culture can be used in the multiplication of basic seed potatoes.

• Journal of Bio-Environment Control
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• v.17 no.1
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• pp.14-19
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• 2008

The experiment was investigated the effects of lower root zone temperature on shoot and root growth of 'Akihime' strawberries in aeroponics in cold season. Root growth was decreased with decrease of root zone temperature, especially in lateral roots. Elongation of main roots was highest in $18^{\circ}C$ of root zone temperature. Number of lateral roots and length of lateral roots were lowest in $8^{\circ}C$ of root zone temperature. Lower root zone temperature resulted significantly in decrease of fresh weight of root and shoot and leaf area of strawberry. But there were no significant statistical differences in shoot fresh weight and leaf area in $8^{\circ}C$ and $13^{\circ}C$ of root zone temperature. Leaf length, leaf width and number of leaves of strawberry were decreased in lower root zone temperature. The results of this experiment will be utilized in the winter season cultivation for strawberry in hydroponics.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1996.05a
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• pp.1-10
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• 1996

Factory-style plant production systems of various kinds are the final goal of greenhouse production systems. These systems facilitate planning for constant productivity per unit area and labor under various outside weather conditions, although energy consumption is intensive. Physical environmental control in combination with biological control can replace the use of agricultural chemicals such as insecticides, herbicides and hormones to regulate plants. In this way, closed systems which do not use such agricultural chemicals are ideal for environmental conservation for the future. Nutrient components in plants can be regulafied by physical environmental control including nutrient solution control in hydroponics. Therefore, specific contents of nutrients for particular plants can be listed on the container and be used as the basis of customer choice in the future. Plant production systems can be classified into three types based on the type of lighting: natural lighting, supplemental lighting and completely artificial lighting (Plant Factory). The amount of energy consumption increases in this order, although the degree of weather effects is in the reverse order. In the addition to lighting, factory-style plant production systems consist of mechanized and automated systems for transplanting, environmental control, hydroponics, transporting within the facility, and harvesting. Space farming and development of pharmaceutical in bio-reactors are other applications of these types of plant production systems. Various kinds of state-of-art factory-style plant production systems are discussed in the present paper. These systems are, in general, rather sophisticated and mechaized, and energy consumption is intensive. Factory-style plant production is the final goal of greenhouse production systems and the possibilities for the future are infinte but not clear.

• 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.