• Journal of Bio-Environment Control
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• v.18 no.4
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• pp.354-362
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• 2009

This study was performed to develop a suitable nutrient solution for standard rose substrate culture in a closed hydroponic system. 1/4, 1/2, 2/3 and 1 strength of the nutrient solution made by Japan National Institute of Vegetable and Tea Science (JNIVT) were supplied. The photosynthesis rate, quality and growth of cut flower were higher in the 1/2 and 2/3 strength of nutrient solution during high and low temperature period. Based on the above results, optimum nutrient solutions (UOS) were composed by nutrientwater (n/w) absorption ratio with 1/2S ($NO_{3^-}N$ 6.8, $NH_{4^-}N$ 0.7, $PO_{4^-}P$ 2.0, K 3.8, Ca 3.0, Mg 1.2, $SO_{4^-}S$ $1.2me{\cdot}L^{-1}$) at high temperature season and 2/3($NO_{3^-}N$ 9.7, $NH_{4^-}N$ 0.8, $PO_{4^-}P$ 2.2, K 5.0, Ca 3.9, Mg 1.5, $SO_{4^-}S$ $1.5me{\cdot}L^{-1}$) at low temperature season. The results of suitability examination showed that the EC level in newly composed nutrient solution (UOS) was more stable than other nutrient solutions due to its large amount of calcium and potassium. The growth of cut flower cultivated with UOS was higher than those of other nutrient solutions. Especially, the yield of cut flowers in UOS nutrient solution increased 1.4 times than that of other nutrient solution treatments. Consequently, the new nutrient solution investigated in this experiment was suitable for rose cultivation in a closed hydroponic system.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2001.11a
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• pp.151-155
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• 2001

장미는 광포화점이 50,000 lux 이상으로 광요구도가 매우 큰 화훼작물이다. 따라서 유리와 같은 광투광율이 높은 자재를 피복한 온실에서 색도나 절화의 특성이 우수하여 품질이 향상된다. 그러나 온실에 유입되는 태양에너지가 매우 커서 계절에 따라서는 열집적현상이 나타나 고온과 일소현상과 같은 이유로 식물체가 스트레스를 받기도 한다. 이러한 현상은 장미를 재배하는 시설의 피복자재에 따라 차이가 매우 크다. (중략)

• Journal of Life Science
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• v.10 no.6
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• pp.591-597
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• 2000

An investigation was conducted to elucidate the effect of sucrose, germicides and abscisic acid (ABA) in the preservatives on postharvest quality, such as fresh weight, solution uptake, vase life, diameter and thickness of flower, and chlorolhyll of leaf in cut chrysanthemum 'Kyoungsubang`. Fresh weight of cut chrysanthemum was highest in 250mg/L aluminum sulfate [{TEX}$Al_{2}(SO_{4})_{3}${/TEX}]+3% sucrose and 250 mg/L 8-hydroxyquinoline sulfate (8-HQS)+ 3% sucrose. Addition of sucrose and germicides inhibited microorganisms growth in solution, and apparently promoted solution uptake. The increased fresh weight seems to attribute to the elevated uptake. Germicide 8-HQS was more effective than {TEX}$Al_{2}(SO_{4})_{3}${/TEX} in the aspect of solution uptake and fresh weight. Treatment of 250 mg/L 8-HQS +3% sucrose showed the longest vase life (24.67±2.52 days) and the lowest rate of leaf chlorosis (or senescence). Addition of {TEX}$Al_{2}(SO_{4})_{3}${/TEX} and sucrose accelerated leaf chlorosis and increased diameter of flower, respectively. Sucrose treatment prolonged the vase life of flowers. Except control and 250 mg/L 8-HQS, content of chlorophyll was rapidly decreased after 6 days at upper, middle and lower leaves in order.

• Korean Journal of Medicinal Crop Science
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• v.16 no.6
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• pp.421-426
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• 2008

Three year-old peony (Paeonia. lactiflora Pall. cv. Taebaek) was cultivated in green-house at Jan. 15, Feb. 15, or Mar. 15, respectively. The mean of temperature during the forcing cultivation was higher (air; $1.0{\sim}11.1^{\circ}C$, soil; $1.1{\sim}7.4^{\circ}C$) than that of open-field condition. From sprouting to flowering in peony cultivated at Jan. 15 was about 54 days, which is shorted the cut flower periods (ca. 26 days) compared with the open-field cultivation. However, earlier forcing cultivars were very susceptible to pathogens such as powdery mildew or gray mold. The yield in green house was also lower than in the open-field cultivation. The content of bioactive compounds such as paeoniflorin and albiflorin in green-house cultivars was similar that of open-field cultivars. These results showed the forcing cultivation time of peony at Feb. 15 in green-house was most desirable for commercialization.

• Horticultural Science & Technology
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• v.19 no.4
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• pp.585-590
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• 2001

Bulbs of Lilium Oriental hybrids cv. 'Casablanca' and 'Marco Polo' were grown in a plastic house in alpine area of Pyongchang Kangwondo. Saw-dust, black film, reflective film, transparent film, and white/black double film were used as mulching materials to ascertain the growth of foliage, the quality of flower, and the size of bulbs. Foliage weights of both lilies were higher when lilies were grown with mulching materials than control. There were no differences of bulb weight among the control and mulching treatments, except delayed bulb growth in black film and white/black double film. Mulching cultivation with saw-dust and reflective film stimulated foliage growth, root growth and bulb production, but black film delayed the growth and development. Transparent and white/black double films showed no effects on foliage growth and bulb development than the control. As mulching materials tended to delay lily growth, including foliage and bulb, an extension of growing term might be better to produce high quality lilies than common cultivation in alpine area.

• Journal of Bio-Environment Control
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• v.14 no.2
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• pp.128-136
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• 2005

The objective of this study was to determine the effect of calcium concentrations in fertilizer solution on growth and cut flower quality of chrysanthemum 'Biarritz' To achieve this, deficiency symptom and growth characteristics as influenced by controlled Ca concentrations in fertilizer solution were investigated. The analysis of plant tissue and soil solution of root media were also conducted to secure optimum concentration for plant growth. Calcium deficiency developed on the very youngest leaves and the young leaves developed 'cupped' shape as they expand. The cut flower length of 0, 3.0 and 6.0 mM treatments were 105.8, 106.5, and 107.3cm, respectively. Elevated Ca concentration within the range from 0 to 6.0mM in fertilizer solution increased cut flower weight. The cut flower weight of control and 6.0mM treatment were 51.6 and 59.4 g, respectively. The tissue Ca content of 6.0mM treatment in which crops showed the highest growth among treatments was $3.09\%$ based on the dry weight of the youngest fully expanded leaves. From the results, it seems necessary to maintaining tissue Ca content higher than $2.8\%$. Soil Ca concentrations increased as K concentrations in fertilizer solution were elevated. Ca concentration in 0.0, 1.5, 3.0, 4.5 and 6.0mM treatments were 5.0, 7.4, 12.1, 16.5 and $28.2mg{\cdot}L^{-1}$, respectively, at harvesting stage. It is suggested that Ca concentration higher than $25.4mg{\cdot}L^{-1}$ in soil solution of root media is required to maintain normal growth.

• Horticultural Science & Technology
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• v.31 no.1
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• pp.128-132
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• 2013

A new pink gerbera (Gerbera hybrida Hort.) cultivar 'Party Time' was developed from a cross between 'Hope' and 'Sunnyeo', followed by seedling and line selections at the Flower Research Institute of Gyeongnam Agricultural Research and Extension Services (GARES) in 2007. Detailed characteristics of the new cultivar were evaluated from 2005 to 2007. 'Party Time' has semi-double type large flowers in a good harmony with pink (RHS, 65-C) ray floret and brown center. It has a good, stable flower shape and strong peduncles, and its vase life was 12.7 days. The average flower yield of 'Party Time' was about 47.3 stems per plant a year in greenhouse yield trails carried out 2005 to 2007. 'Party Time' (Grant No. 2691) was registered to the Korea Seed and Variety Service (KSVS) for commercialization in 2009.

• Korean Journal of Breeding Science
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• v.41 no.4
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• pp.595-598
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• 2009

A new yellow gerbera (Gerbera hybrida Hort.) cultivar "Golden Time" was developed from a cross between '99-ga-2' and '99-na-7-6', followed by seedling and line selections at the Flower Research Institute, Gyeongnam Agricultural Research and Extension Services (ARES) in 2007. Detailed characteristics of the new cultivar were evaluated from 2004 to 2007. "Golden Time" has semi-double type large flowers in a good harmony with yellow (RHS, 17-B) ray floret and brown center. It has good, stable flower shape and strong peduncles, and its vase life was 12.3 days. The average flower yield of "Golden Time" was about 49.5 stems per plant/year in greenhouse trails during 2004 and 2007. This cultivar was registered to the Korea Seed and Variety Service (KSVS) for commercialization in 2009. Year-round production of this cultivar is possible in the greenhouse condition throughout the Korean climate.

• FLOWER RESEARCH JOURNAL
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• v.16 no.2
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• pp.124-127
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• 2008

A new orange-colored, cut flower gerbera (Gerbera hybrida Hort.) cultivar 'Sweety' was developed from a cross between 'Grandeur' and 'Songsongee', followed by selections of seedlings and lines at the Flower Breeding Research Institute, Gyeongnam Agricultural Research and Extension Services (ARES) from 1999 to 2004. Three time evaluations were conducted from 2003 for the detailed characteristics of the new cultivar. 'Sweety' has semi-double type mini- or medium-sized flowers in good harmony with orange(RHS, 38-A) ray florets and a green center. It has good, stable flower shape and strong peduncle, and its vase life was 10.4 days. The average flower yield was about 51.0 stems per plant/year in greenhouse trails during 2003 and 2004. This cultivar was registered to the Korea Seed and Variety Service for commercialization in 2006. Year-round production of this cultivar is possible in the greenhouse condition in Korean climate.

• FLOWER RESEARCH JOURNAL
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• v.17 no.3
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• pp.201-204
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• 2009

A new orange mini gerbera (Gerbera hybrida Hort.) 'Yetty' was developed from a cross 'Haiti' and 'Nova Zembra' followed by seedling and line selections at the Flower Research Institute, Gyeongnam Agricultural Research and Extension Services (ARES) from 2001 to 2006. Three times evaluations were conducted from 2004 for the detailed characteristics of the new cultivar, 'Yetty' has single type mini flower in good harmony with orange (RHS 25-A) ray floret and browen center. It has good stable flower shape and strong peduncle, and its vase life was 14.8 days. The average yield of 'Yerty' was 98.5 flowers per plant a year in greenhouse yield trials carried out from 2004 to 2006. This cultivar registered for commercialization in 2007. 'Yerty' would be cultured under greenhouse condition in Korea.