• Journal of agriculture & life science
• /
• v.44 no.6
• /
• pp.9-14
• /
• 2010

The present study was performed to identify the possibility of the disused paper-sludge to substitute an substrate for nursery plants. Tosilee substrate as control, paper-sludge and tosilee substrate (1:1, v:v), and paper sludge substate were used in this experiment. After harvesting tomato seedlings, there were no significant differences in growth parameters such as plant height, root length, and fresh and dry weight grown for tosilee substrate, and paper-sludge and tosilee mixture substrate. However, the seedlings grown for paper-sludge substrate alone were extremely depressed. These growth pattern was followed by cucumber seedlings. As the result of this experiment, we suggest that it must need to stabilize the pH and EC, and Zn concentration in paper-sludge for increasing its material for substrate.

• Journal of Bio-Environment Control
• /
• v.12 no.3
• /
• pp.121-126
• /
• 2003

Tomato (Lycopersicon esculentum M. cv. ‘Momotarou’) and hot pepper seedlings (Capsicum annuum L. cv. 'Nockkwang')were grown under the 24h photopeliod (12 hrs light period: 12 hrs dark period) and 6 h photoperiod (3 hrs light period: 3hrs dark period). As a result of this experiment, the following details were observed. Plant height, leaf area, total dry weight, and leaf chlorophyll content decreased in case of tomato seedlings when they were given 6 h photoperiod. But the same effect was not observed in case of hot pepper seedlings. The photoperiod, however, did not produce any significant effect on the uptake of N, P, K, Mg and Ca ions in their nutrient solutions with the exception of their Fe. On thc 10th day of treatment, leaf chlorosis started to become visible in tomato seedlings and at the same time the uptake of Fe went down when the 6h photoperiod was applied to both tomato and hot pepper scedlings. In addition to this phenomenon, the sucrose content in leaf increased in case of tomato plants which were treated with 6 h photoperiod; on the other hand, their glucose content was observed to have decreased.

• Journal of Bio-Environment Control
• /
• v.12 no.4
• /
• pp.184-189
• /
• 2003

This research was conducted to determine the effect of mixing ratio of aquafarm waste water sludge (AWWS) in the growing medium as a source of fertilizers on growth of plug seedlings of pepper (Capsicum annuum L.) and tomato (Lycopersicum esculentum Mill.). Increased mixing ratio of AWWS resulted in increased fresh and dry weights, leaf area, plant height, and total chlorophyll content, although there were slight differences in growth characteristics at 20 and 40 days after sowing. Concentration of AWWS affected insignificantly the percent dry matter, number of leaves, and length of the longest root. The addition of AWWS increased pH and decreased EC in the medium as compared to that of chemical fertilizer. Compared to the control of a liquid fertilizer, 4 or 8 kg AWWS${\cdot}45L^{-1}$ medium (Sludge 4) gave a similar or slightly better growth. Above results suggested that addition of about 4 kg AWWS${\cdot}45L^{-1}$medium is sufficient for seedling growth and the AWWS can be used as a substitute for the liquid fertilizer in plug seedling production.

• Journal of Bio-Environment Control
• /
• v.14 no.4
• /
• pp.302-306
• /
• 2005

This Study was Conducted in 3 glasshouse to examine the Possibility for cultivation of plug seedlings using four growing media containing recycled PET-bottle-particles (PBT) as a medium component. Plug seedlings of 'Seokwang' tomato were grown in media containing $100\%$ PBT, $100\%$ peatmoss, or $50\%$ $PBT+50\%$ peatmoss. A commercial plug medium (Tosilee) was used as the control. All seeds were sown in 128 cell plug trays on July 12, 2004. Seedling growth was measured at 30 days after sowing. Percent seed germination was greater than 95% in all treatments. Plant height, shoot fresh and dry weights, leaf area, and hypocotyl length were the greatest in the control treatment. Root length and weight were the greatest in the $100\%$ PBT treatment, which had a medium pH of 7.3. Leaf area and shoot dry weight were greater in the $50\%$ $PBT+50\%$ peatmoss treatment, than in the $100\%$ PBT treatment, while they were the smallest in the $100\%$ peatmoss treatment. No toxicity symptoms caused by the use or PBT had been observed in any treatment. The results suggest a possibility of recycled PBT, a valuable reusable resource, to be used as a component for medium amendments in horticultural transplant production.

• Journal of Bio-Environment Control
• /
• v.12 no.1
• /
• pp.7-11
• /
• 2003

Cellular glass foam (CGF), the reprocessed glass, has a possibility to be used as a medium component in plug culture of horticultural crops due to the its excellent air and water permeability as comparable to perlite. An experiment was conducted to investigate growth of plug seedlings of Lycopersicum esculentum 'Segye' as influenced by irrigation frequency in various medium combinations of CGF (2.0-4.0 mm particle size) and peatmoss. Seeds were sown in 200-cell plug trays, filled with mixtures of CGF and peatmoss either at 33：67 or 25：75 (％. v/v) and were germinated on a fogged propagation bed. The irrigation frequencies used were one, two or three times per every two days. A commercial plug medium (Tosilee medium) was used as the control, and the irrigation frequency in the control was one time per day. Growth of seedlings, and medium pH and EC were measured at 33 days after sowing. The medium composition had little influence on overall growth of seedlings. Irrigation frequency very significant affected number of leaves, leaf area, chlorophyll concentration, fresh and dry weights of shoots and roots, and dry matter. Growth of seedlings was the greatest with the highest irrigation frequency in the 25% CGF＋75% peatmoss mixture.

• Journal of Bio-Environment Control
• /
• v.27 no.1
• /
• pp.54-63
• /
• 2018

Red and blue lights are effective wavelengths for photosynthesis in plants. In this study, we determined the effects of various combined ratios of red to blue LEDs on the quality of cherry tomato seedlings prior to transplantation, and their subsequent effects on the yield and quality of tomato fruits after transplanting. Two-week-old cherry tomato seedlings (Solanum lycopersicum cv. 'Cuty') were cultivated under various combined ratios of red (R; peak wavelength 655 nm) to blue (B; 456 nm) LEDs [red:blue = 41:59 (59B), 53:47 (47B), 65:35 (35B), 74:26 (26B), 87:13 (13B), or 100:0 (0B)] and fluorescent lamps and raised for 27 days. The cherry tomato seedlings were subsequently transplanted into a venlo-type greenhouse and cultivated for 75 days. At the seedling stage, the shoot fresh weight of seedlings in all RB combined treatments, except 0B and 59B, was higher than that of the control after 27 days of LED treatment. Shoot dry weight and leaf area also showed trends similar to that of shoot fresh weight. The stem length was significantly higher in 13B, 26B, and 35B treatments compared with the control and other treatments. In particular, the stem length of 26B plants was approximately 3.2 times longer than that of 59B plants. At 37 days after transplanting, the number of nodes was significantly higher in 26B and 47B plants, and the plant height of 26B plants was significantly higher than that of control and 59B plants. Total fruit yield in 26B plants, which was the highest, was approximately 1.6 and 1.8 times higher than that in control and 59B plants, respectively. Thus, the results of this study indicate that various combined ratios of red to blue LEDs directly affected to the growth of cherry tomato seedlings and may also affect parameters of reproductive growth such as fruit yield after transplantation.

• Journal of Bio-Environment Control
• /
• v.23 no.1
• /
• pp.43-49
• /
• 2014

This study was designed to determine the effect of red LEDs during healing and acclimatization process on the survival rate and quality of grafted tomato seedlings. Red LEDs and no light (darkness) were used for treating three rootstock cultivars, which are 'B-Blocking', 'Kanbarune', 'High-power' in healing room. Results showed that survival rates of grafted seedlings in red LEDs were higher than those in no light treatment. Significant variation on survival rates of rootstock cultivars was observed in no light treatment but there was not significant variation in red LEDs treatment. Light treatment also reduced the percentage of infected plants, except for the 'Kanbarune' cultivar. Seedling quality in red LEDs was better than that in no light treatment by improving growth parameters such as plant height, leaf length, leaf width, leaf area, fresh and dry weight of shoot and root. Light treatments and rootstock cultivars did not affect number of leaves, leaf chlorophyll value and T/R ratio of seedlings, but seedlings in red LEDs were significantly more compact than those in no light treatment. Moreover, the root morphology of seedlings such as total root surface area, total root length, and number of toot tips in red LEDs was also greater than that in no light treatment.

• Proceedings of the Korean Society for Bio-Environment Control Conference
• /
• 1995.10a
• /
• pp.58-60
• /
• 1995

1995년 현재 전국의 육묘장 수는 대략 25개소에 이른다. 1992년부터 도입되기 시작한 플러그육묘 방식은 급속도로 늘어나 매년 5-7개소가 신설되고 있다. 이와 같이 양적팽창에도 불구하고 품질, 수량, 납기 및 경영상의 문제점을 드러내고 있어 상당수의 육묘장은 경영적 어려움에 처해 있다. 이와 같은 문제점 중에서도 가장 심각한 것은 기술수준의 낙후로 인한 품질의 저하이다. 플러그는 작은 셀내에서 육모되기 때문에 밀도가 높아 도장의 우려가 크다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
• /
• 2002.04a
• /
• pp.120-124
• /
• 2002

수박, 토마토 등에 널리 적용되는 삽접, 할접, 핀접 등의 접목 방법에서는 접수의 배축이 절단된 상태에서 접목이 이루어진다. 그러므로 상기의 접목 방법이 적용될 때 접수의 위조를 방지하고 접목묘의 활착율을 증대시키려면 접목 초기에 접목묘로부터 증발산이 과도하게 이루어지지 않도록 활착 환경이 조절되어야 한다. 인공광하에서 활착되는 접목묘로부터 증발산을 억제하면서 활착율을 높이려면 활착실 내에서의 상대습도가 90% 이상으로 높게 유지되어야 한다(Kim, 2000). (중략)

• Journal of Bio-Environment Control
• /
• v.8 no.2
• /
• pp.75-82
• /
• 1999

This study was carried out to examine the effect of day/nignt temperatures during seedling culture on the vegetative and reproductive growth of Lycopersicum esculentum ‘Seokwang’. The study was consisted of two culture stages, plug seedling production in the growth chamber and hydroponic culture of the plant in a glasshouse. Experiments were replicated over time. The germinated seedlings were raised for 33 days (experiment 1) and 35 days (experiment 2) in 4 growth chambers, each with day/night temperatures of either $25^{\circ}C$/$25^{\circ}C$, 16$^{\circ}C$/16$^{\circ}C$, 16$^{\circ}C$/$25^{\circ}C$ or $25^{\circ}C$/16$^{\circ}C$. Cool-white fluorescent lamps provided 140$\mu$mol.m$^{-2}$ .s$^{-1}$ light for 12h each day. In the second experiment, all chambers were supplied with 1000$\mu$mol.mol$^{-1}$ CO$_{2}$ during the photoperiod and had an air velocity of 0.3m.s$^{-1}$ and relative humidity of 80%. Plug seedlings raised were transplanted to rockwool slabs in a glasshouse and were grown hydroponically using the same nutrient solutions used for seedling culture for 37 days (experiment 1) and 35 days (experiment 2). Plant height was affected more by mean daily temperature than by interaction of day and night temperatures. Plant height was the highest in 16/16$^{\circ}C$ treatment. Leaf count was not affected by day and night temperatures, and the chlorophyll concentration was the highest in 16/$25^{\circ}C$ treatment. Fresh and dry weights of stem tended to be greater in treatments of constant day and night temperature. The number of node on which first and second flower clusters were set was significantly higher in 25/$25^{\circ}C$ treatment than in the other treatments. Days to flower of the first flower on the first flower cluster were the greatest in 25/$25^{\circ}C$ and the least in 16/$25^{\circ}C$ treatment. Vegetative and reproductive growth, such as height, fresh and dry weights, days to flower, and nodes of the 1st and 2nd flower cluster set were affected by day/night temperatures.