• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2002.11a
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• pp.241-245
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• 2002

최근 시설재배에서는 염류 집적 및 토양전염성 병해충 등으로 인한 연작장해를 회피하기 위하여 수경재배로 전환하는 농가가 급속히 증가하고 있다. 우리나라의 수경재배면적은 '98년 23 ha에서 2000년 1,000 ha로 급속히 증가하고 있는데, 이중 약 12％는 담액수경이나 박막수경의 순수 수경재배 방식이 차지하고 있으나 대부분이 고형배지를 이용한 비순환방식이다. 배양액의 비순환방식은 토양이나 지하수의 오염이 염려되지만, 순환방식의 경우에는 배양액 성분의 조정이나 배양액의 소독 등재처리가 필요하여 농가에서는 기피하고 있는 실정이다. (중략)

• Journal of Bio-Environment Control
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• v.8 no.2
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• pp.90-98
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• 1999

This study was conducted to select proper substrate and nutrient solution concentration for favorable growth and quality in common thyme (Thymus vulgaris L.). The growth of common thyme was better in deep flow culture (DFT) than in other substrate cultures. As the nutrient solution concentration rose, the ratio of dry matter increased, while the fresh weight and the number of lateral shoots decreased. The contents of total chlorophyll and vitamin C were higher in DFT than others. Ca, K, P were showed high contents in cocopeat, but Mg content was the highest at half-fold concentration in DFT. Common thyme showed low content of nitrate in DFT compared with that in other substrate culture. DFT was the most effective system for pronoting growth and quality of common thyme. The optimal concentration of nutrient solution in common thyme was half-fold(EC=1.2mS/cm) of herbs nutrient solution by European Vegetable R&D Center.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.25 no.9
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• pp.1254-1262
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• 2021

Recently, the agricultural environment in Korea is rapidly changing due to the aging and decline of the agricultural population, and in order to solve these problems, it is urgently required to improve the agricultural productivity and reduce the labor force. To solve this problem, a smart farm fused with ICT technology is being proposed as an alternative. In Korea, smart farms are currently mainly used in greenhouses. In this paper, this smart farm technology is to be applied to the cultivation of sprouted ginseng. To this end, we use seedlings (about 1.0g) to grow a solid medium and bed for cultivating sprouted ginseng, a fresh ginseng that is produced in a short period of time (2~3 months) with a clean environment management technology that does not use chemical pesticides and hydroponics in a greenhouse developed. In addition, an IoT-based growth environment management system was developed to monitor the growth process of sprouted ginseng in such an environment and to control driving devices.

• Journal of Bio-Environment Control
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• v.16 no.3
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• pp.228-232
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• 2007

We have also clarified the effects of the different substrates; (perlite, peatmoss and granular rock-wool) on the plant growth and the mineral contents of Campanula takesimana until 70 days after transplanting. Overall plant growth in terms of plant height, stem diameter, number of leaves, root length, fresh and dry weight of shoot and root were increased in the order of that mixed perlite and peat moss (50 : 50, v/v)>peat moss (100%)>perlite (100%)>granular rock wool (100%). Mineral contents in plants were much more in the order of potassium $(15.38-43.91cmol^+/kg)$, calcium $(5.48-7.78cmol^+/kg)$, magnesium $(4.38-6.55cmol^+/kg)$ and sodium $(1.25-1.69cmol^+/kg)$. The higher mineral contents of plants were also most made in the mixed substrates of perlite and peat moss (50 : 50, v/v).

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1997.11a
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• pp.72-76
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• 1997

방울토마토와 같은 과채류의 상품성을 결정하는 인자는 여러 가지가 있으며, 당도와 색깔은 내외품질을 결정하는 중요한 인자이다. 과실의 당도를 증진시키기 위한 연구는 많이 진행되고 있는데, 특히 관수량의 조절이 당도를 높이는데 중요한 역할을 한다. 고형배지경은 순수수경과는 달리 수분공급을 용이하게 조절할 수 있다는 점에서 고당도 재배에 적당하나, 배지의 종류에 따라서 반응이 다르다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1998.05a
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• pp.128-130
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• 1998

지난날 각 가정에 많이 사용해왔던 등잔불이 심지라는 섬유제품을 통하여 기름이 올라오는 원리 즉 모세관 현상을 이용한 조명 방법이었다. 고형배지를 이용한 양액재배에서 양액의 공급은 동력기기를 이용한 소위 에너지를 많이 소비하는 방법이 거의 전부라 할 수 있다. 에너지를 절약할수 있는 방법을 생각하던 중에 섬유직조물들이 갖고 있는 모세관현상을 이용한 급액방법을 몇가지 섬유제품을 가지고 시도해 보았는데 예상했던 것 보다 훨씬 다양하고 좋은 결과를 얻었다. (중략)

• Journal of Bio-Environment Control
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• v.4 no.1
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• pp.25-31
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• 1995

This study was carried out to investigate the effect of the concentration of nutrient solution on the growth of tomato(Lycopersicon esculentum Mill. cv. seokwang) in substrate culture. The substrates used in the experiment were perlite, vermiculite, and peatmoss. Tomato plants were treated with different concentrations of nutrient solution, viz. 0.5, 1.0, 2.0, 3.0, and 5.0mS/cm at seedling stage and transferred to different treatments, 1.0, 2.0, and 3.0mS/cm after transplanting in each substrate. As the concentrations of nutrient solution increased from 0.5 to 3.0mS/cm at seedling stage, the $CO_2$ assimilation rates of seedlings increased in all three substrate culture. Beyond this range, the $CO_2$ assimilation rates of seedlings decreased. By increasing the concentrations of nutrient solution, plant height, leaf length, leaf width, stem diameter, and top dry weight increased in perlite and were high at 2-5mS/cm in vermiculite. On the other hand, in peatmoss, the best result was shown at 3.0mS/cm. Therefore, the adequate concentration of nutrient solution on early growth of seedlings differed among substrates and was shown to be 3.0-5.0mS/cm in perlite, 2.0-5.0mS/cm in vermiculite, and 3.0mS/cm in peatmoss. Generally, as the concentrations of nutrient solution increased from 1.0 to 3.0mS/cm after transplanting, dry weight increased significantly in all three substrate culture. However, dry weights of tomato plants grown under high concentration of 5.0mS/cm slightly increased both at seedling stage and after transplanting.

• Horticultural Science & Technology
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• v.16 no.1
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• pp.25-26
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• 1998

Nutrient supplying by a metering pump often produces the inaccuracy in the rate of inflow than expected. In this study, we developed the transpiration estimation system using the metering pump to measure the continuous supplying rate as well as to estimate the accurate transpiration rate. The system showed the stable characteristics by eliminating the fluctuations in the head loss of nutrient tank. The direct proportionality between the supplying time and the supplied nutrient solution was obtained. The exact correlation between the integrated solar radiation and the transpiration rate using the system was calculated, and correlation coefficients between the two factors were 0.98 in the NFT system and 0.92 in the aggregate system. This results suggest that the integrated solar radiation was an important factor to directly decide the supplying volume of nutrient solution in soilless culture system. The deveolped system using the metering pump in the study was able to control the supply of the nutrient solution to the crops adjusting to the variation of solar radiation.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1998.10a
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• pp.92-94
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• 1998

최근 도시근교 시설재배토양의 염류 과다집적과 연작장해 발생으로 생산성이 저하되고 있다. 그리고 고품질 연중생산이 가능한 양액 재배 면적이 '93년 23ha에서 '97년 414ha로 급속히 증가되고 있는데 이 중 약12%가 담액경이나 박막수경의 순수 수경재배 방식이 차지하고 있다. 순환식 담액수경 상추재배를 기준으로 할 때 농가 300평 재배시 약 100ton의 양액이 소요되며 이 양액은 1회 재배가 끝난 후 상당량이 폐기되고 있고 고형 배지경 양액 재배의 경우에도 대부분 비 순환식 재배로 1회 관수 후 나오는 배액이 그대로 버려지고 이어 토양 및 지하수 등 환경오염, 자원 낭비 등의 여러 가지 문제를 야기시키고 있다. (중략)

• Journal of agriculture & life science
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• v.44 no.5
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• pp.9-13
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• 2010

This study was conducted to identify the possibility of utilization of coconut substrates for nutrition culture of cut-chrysanthemum. The materials of substrate were composed of dust, fiber, and chip from coco-nut fruit. Dust was used in dust (100%), and dust+chip and +fiber were used in the ratio of 7:3 (v:v), respectively, as coconut mixture substrate. Perlite was used as control in this experiment. Water content in the perlite medium was lower than in dust substrate. The pH of all coconut substrates ranged from 6.5 to 5.8, whereas perlite substrate ranged from 7.3 to 6.7. While, EC of dust substrates shown to be highest but perlite substrate was lowest. The growth of chrysanthemum such as stem length, leaf area, and dry matter showed better results in coconut substrates than that of perlite and dust. However, there was no differences days to in flowering among treatments.