• 한국자원식물학회지
• /
• 제28권4호
• /
• pp.546-549
• /
• 2015

This study was carried out to investigate the effect of simple hydroponic culture in cultivation of grafted cactus. The results obtained are as follows: Growth indexes of grafted cactus cultivars, such as scion diameter, fresh weight, and scion hardness were improved in simple hydroponic culture compared with soil culture regardless of cultivars. Stem rot and rate of non-graft take were lower in simple hydroponic culture than in soil culture, but no significant difference was monitored between cultivars. Time for harvesting was fast in simple hydroponic culture compared with soil culture. Marketable yield increased in simple hydroponic culture.

• 생물환경조절학회지
• /
• 제11권1호
• /
• pp.18-22
• /
• 2002

대목종류별 병해는 양액재배에서 토양재배보다 감소하였으며, 특히 토양재배에서 39.9∼53.3%발생하였던 덩굴마름병은 양액재배에서는 거의 나타나지 않았다. 발효과 발생은 신토좌에서 가장 높았고, 흥토좌, 자근묘 순이었는데, 양액재배에서의 발효과 발생은 대목 종류와는 관계없이 토양재배보다 급격하게 감소하여, 토양 수분의 급격한 변동이 없이 적절한 수분 관리가 이루어지면 대목 종류와는 관계없이 발효과가 저하될 수 있는 것으로 판단되었다.

• 한국유기농업학회지
• /
• 제22권4호
• /
• pp.841-854
• /
• 2014

This study aimed to analyze the selection criteria and priority settings for solid culture medium used in hydroponic crop production in farm households. Expert brain storming was carried out to extract solid culture medium selection criteria for hydroponic farming. As a result, 3 criteria of economy (cost), productivity, and environment, and 9 factors were extracted. A questionnaire survey of hydroponic farm households was conducted in Gyeonggi, Gangwon, and Chooncheong provinces. AHP analysis of the hydroponic solid culture medium selection criteria identified productivity as the most important criterion, chosen by 58.7% of the respondents, followed by economy (28.4%) and environment (12.9%). The 9 factors were rated by the respondents in the following decreasing order of importance: 1, crop yield (28.3%); 2, pest occurrence (18.5%); 3, maintenance/management costs (12.0%); 4, convenience of maintenance/management (13.4%); 5, initial investment cost (11.6%); 6, material energy consumption (6.5%); 7, waste recyclability (4.0%); 8, waste disposal costs (3.4%); and 9 environmental emissions (1.81%). These results imply that hydroponic farm households consider cultivation-related quality factors more important than economic factors, such as price of culture medium or installation cost.

• 한국식품영양학회지
• /
• 제30권6호
• /
• pp.1191-1198
• /
• 2017

This study aimed to evaluate the utilization of the top of a low intake of root, through the analysis of the antioxidant activity of the powder of hydroponic-cultured ginseng. Quality characteristics and antioxidant activity were compared and analyzed with Korea's traditional dessert Gaeseong-Juak, which is made of the powder of hydroponic-cultured ginseng's leaf by adjusting the added volume. DPPH radical scavenging activity of the hydroponic-cultured ginseng by the part powder was in the following order: highly stem, leaf and root. It was measured as 67.9%, 42.9%, and 25.9% at the 1 mg/m level. Gaeseong-Juak was prepared by adding hydroponic-cultured ginseng leaf powder at 0%, 0.3%, 0.6%, and 0.9% of the rice powder. As the content of hydroponic-cultured ginseng leaf powder increased, moisture content, L-value, and a-value were significantly decreased, while the b-value was significantly increased. The texture profile analysis of Gaeseong-Juak was not significantly different among the samples. In the sensory test, the sample containing 0.6% hydroponic-cultured ginseng leaf powder achieved good scores. The DPPH radical scavenging activity of Gaeseong-Juak was significantly increased, as the addition level increased, compared to the original. Based on the above results, hydroponic-cultured ginseng leaf was verified to be a possible natural antioxidant. It can increase food's nutritional values and possibilities when made of hydroponic-cultured ginseng, using leaf which is added to the traditional dessert Gaeseong-Juak.

• 태양에너지
• /
• 제10권3호
• /
• pp.27-34
• /
• 1990

온실 수경재배 작물의 증산속도와 환경요인과의 관계를 규명할 목적으로 플라스틱 온실 내부 작물의 엽면 열수지식을 해석하여 온실 내부의 환경요인에 따른 엽온 및 증산속도를 추정할 수 있는 컴퓨터 모형을 개발하였다. 여기서 개발된 모형은 실제 플라스틱 온실에서 실시한 상추의 수경재배 실험 결과를 이용하여 검증하였으며, 앞으로 다른 작물에 대한 연구가 보완된다면 이 모형을 이용하여 시설재배 작물의 물관리 연구 및 열환경 분석에 유용하게 적용할 수 있을 것으로 사료된다.

• 생물환경조절학회지
• /
• 제30권3호
• /
• pp.244-249
• /
• 2021

본 시험은 국내에 가장 많이 보급되어있는 북부하이부쉬 블루베리 '듀크' 품종에 대한 시설하우스 양액재배 가능성을 평가하기 위해 실시하였다. 블루베리 용기재배에 보편적으로 활용되는 피트모스(130L)와 펄라이트(40L) 배지를 180L 플라스틱 용기에 혼합하여 1년생 묘목을 심은 후 8년간 양액을 지속적으로 공급하는 양액처리구와 지하수만 공급하는 무처리구를 비교하였다. 양액은 NO₃-N 4.6, NH₄-N 3.4, PO₄-P 3.3, K 3, Ca 4.6, Mg 2.2mmol^-1를 EC 1.5로 조절하여 공급하였다. 양액처리구는 처리 후 8년차까지 수체 생장이 양호하였으며, 무처리구보다 주당 신초수가 18% 많고 주당 총신초장은 24%가 길었다. 양액처리구는 무처리구에 비해 뿌리 발달이 양호하였으며 주당 총건물중은 1.4배로 컸다. 식물체의 잎, 신초, 묵은 가지의 무기원소나 유기화합물이 양액처리구에서 대체로 높게 나타나 양액을 통한 양분흡수가 원활하였음을 확인되었다. 수량은 양액처리구에서 4년생 때부터 성과기에 달하여 시험이 종료될 때까지 높게 유지되었다. 이와 같은 결과로 양액재배기술은 블루베리 재배에 유용하게 활용 가능할 것으로 평가되었다.

• 생물환경조절학회지
• /
• 제2권2호
• /
• pp.99-109
• /
• 1993

Cooling of nutrient solution is essential to improve the growth environment of crops in hydroponic culture during summer season in Korea. This study was carried out to provide fundamental data for development of the cooling system satisfying the required cooling load of nutrient solution in hydroponic greenhouse. A numerical model for prediction of the cooling load of nutrient solution in hydroponic greenhouse was developed, and the results by the model showed good agreements with those by experiments. Main factors effecting on cooling load were solar radiation and air temperature in weather data, and conductivity of planting board and area ratio of bed to floor in greenhouse parameters. Using the model developed, the design cooling load of nutrient solution in hydroponic greenhouse of 1,000$m^2$(300pyong) was predicted to be 95,000 kJ/hr in Suwon and the vicinity.

• 식물조직배양학회지
• /
• 제24권2호
• /
• pp.83-86
• /
• 1997

조직배양묘를 이용한 감자 무병주 생산방법을 비교하기 위해 경삽, 기내소괴경 양액재배 및 이들 생산괴경에 대한 후대생산성을 비교하였다. 조직배양묘를 이용한 씨감자 생산방법별 $\textrm{m}^2$당 수량성을 비교해보면 괴경수에 있어 온실내 경삽증식은 75개, 기내소괴경형성시 플라스크는 700개, 페트리디쉬의 경우 1,080개 그리고 양액재배에서는 1,152개가 생산되어 페트리디쉬와 양액재배산 생산방법이 경삽증식이나 삼각 플라스크방법보다 괴경수가 많았으며 괴경중의 경우에선 양액재배방법이 4,492 g로 경삽(4,136 g), 페트리디쉬를 이용한 기내소괴경(1,080 g)의 경우보다 많았다. 그리고 생산방법별로 후대생산성을 비교한 결과 103 당 총수량은 경삽재배산 종서 > 기내소괴경 1차증식산 > 양액재배산 > 기내소괴경 순으로 높았으며 10 a당 괴경수는 양액재배산이 33,064개로 가장 많이 생산되어 상위단계(기본종, 기본식물) 종자생산에 있어 양액재배산 씨감자 이용이 가장 효율적인 것으로 나타났다.

• 한국물환경학회지
• /
• 제20권1호
• /
• pp.32-36
• /
• 2004

In this study, uptake and translocation of 2,4,6-trinitrotoluene(TNT) by plant in a hydroponic culture was quantified with two indigenous plant species, Aeschynomene indica and Abutilon avicennae on various initial concentrations of TNT ranging from 20 to 80 mgTNT/L. Experiments were sterilized to exclude the activity of microorganisms and conducted in duplicate. Weight loss of two plant species in added TNT culture media was higher than in control. At over 2OmgTNTIL, there appeared to be phytotoxicity from TNT as indicated by severe yellow-chlorosis and increase of falling leaves. TNT removal rate normalized(K) to the plant fresh weight of Abutilon avicennae and Aeschynomene indica was that the higher TNT concentrations resulted in lower TNT removal rate normalized(K) to the plant fresh weight. Approximately 96% of the TNT in viable microflora-hydroponic culture was removed after 96h of the experiments.

• 한국환경농학회지
• /
• 제41권3호
• /
• pp.191-198
• /
• 2022

BACKGROUND: Plants can be grown using a culture medium without soil using a hydroponic system. Crop production by the hydroponic system is likely to increase as a means of solving various problems in the agricultural sector such as aging of rural population and climate change. Different water sources can be used to prepare the culture medium used in the hydroponic system. Therefore, it is necessary to study the effect of different water sources on crop production by the hydroponic system in order to explore the applicability of various water resources. METHODS AND RESULTS: Lettuce was cultivated by the hydroponic system and three different water sources [tap water (TW), bottled water (BW), and groundwater (GW)] were used to compare the effect of water sources on lettuce growth. The three kinds of waters with a nutrient solution (TW-M, BW-M, GW-M) were also used as the media. After the six-week growth period, the lettuce length and weight, the number of leaves, and the contents of chlorophylls and polyphenols were compared among the different media used. The lettuces did not grow in the waters without the nutrient solution. In the media, the lettuce growth and the contents of chlorophylls were affected by the different water sources used to prepare the media, while the contents of polyphenols were not affected. The absorbed amounts of ions by lettuces, especially Ca and Zn ions, and the dry weight of the harvested lettuces showed a strong positive correlation. CONCLUSION(S): Overall, this study shows that different water sources used for growing lettuce in a hydroponic system can affect lettuce growth. Further studies on the enhancement of crop qualities using different water sources may be required in future studies.