• KOREAN JOURNAL OF CROP SCIENCE
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• v.35 no.1
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• pp.10-15
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• 1990

These experiments were conducted to investigate the effect of day length on some chracteristics and seed weight in the soybean cultivars. Those were classified into three type's of seed weight with delaying seeding date in the previous paper. Flowering was delayed as the longer day length was employed. When the length became longer. the number of leaves at flowering greatly length of main stem and the number of nodes at maturity greatly increased. The seed weight decreased when the day length was longer than 14 hours. Negative correlation was obtained between seed weight and day length. There was negative correlation between seed weight and the number of days required to flowering, and length of main stem and the number of nodes at maturity. Type I cultivars decreased in seed weight when the day length was longer than 16 hours, but this trend was found to be clear with type II cultivars. Type III cultivars decreased in seed weight with increasing the day length.

• FLOWER RESEARCH JOURNAL
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• v.17 no.4
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• pp.303-307
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• 2009

The purpose of this study was to investigate the effects of ethephon, paclobutrazol, and uniconazole on the flowering of potted Yarrow (Archillea millefolium). Each plant growth regulator was sprayed two times before stem elongation period of yarrow. The tallest was 45.7 cm at $1000mg{\cdot}L^{-1}$ ethephon and the shortest was 11.1 cm at 20 uniconazole. Uniconazole delayed flowering and decreased the number of flowers. Both uniconazole at 20 ppm and paclobutrazol at 200 ppm decreased the number of florets to 90.0% and 43.6% of control, respectively. In ethephon, number of florets was increased 34.1% compared with control. In addition, ethephon and paclobutrazol increased the number of mean auxillaly flowers to 28.6% and 23.5% of control, respectively. On the other hand, uniconazole decrease the number of auxillary flowers to 55.3%. Thus, paclobutrazol was recommended as a suitable plant growth regulator for yarrow pot plant production.

• Journal of Korean Society of Forest Science
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• v.84 no.4
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• pp.495-501
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• 1995

Betula pendula and B. platyphylla var. japonica seedlings and/or grafts growing inside and outside of a plastic-greenhouse were treated with growth regulators to induce flowering at early stages of seedling and graft developments. The seedlings began to develop female catkins visibly in eight to nine months after seeding and in five months after the first treatment of growth regulators. Thirty three percents of the seedlings grown under controlled environment in the plastic-greenhouse with sufficient nutrient supply developed female catkins both in control plants and in the plants treated with IAA, $GA_3$ and kinetin, while none on the control plants grown in the field showed any sign of the development of floral organs. Sixty seven percents of the seedlings treated with ABA and SADH grown in the Plastic-greenhouse developed female catkins. All the seedlings treated with 6.24 mM of SADH developed female catkins. SADH treatment to 2-5 year old seedlings and grafts of birch had a tendency of positive effect on inducing and increasing the flowering of the two birch species.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1997.05a
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• pp.71-73
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• 1997

미스티블루는 안개초와 함께 배경화로서 널리 이용되는 꽃으로 사계성이지만 한 여름철에는 추대본수가 감소하고 봄, 가을에 분지가 활발히 이루어진다. 한 번 정식한 묘를 보통 3년간 재배 하고 있는데 시장의 꽃가격에 맞춰 개화기를 다양하게 조절하고 있다. 보통 비가림하우스 재배시 6월 ∼ 10월 사이에 개화하는데 여름철 고온에 의해 품질이 저하되고 있다. 본 실혐은 시설내에서 미스티블루 재배시 잡초의 발생을 억제하오 절화의 품질을 향상시키고자 몇가지 토양피복제를 처리하여 그 효과를 구명하고자 실시하였다. (중략)

• Korean Journal of Medicinal Crop Science
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• v.13 no.3
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• pp.114-117
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• 2005

Orostachys japonicus, called Wasong as herbal medicine and a short day plant, should be artificially kept in long daylength to control anthesis of its florets. The study was done to clarify the effect of daylength (10, 13, 16 hours a day) on growth, morphological characters, and flowering. The treatments were done on August 25 and afterward samples were taken every 2 weeks. Growth, morphological and flowering related characters were measured from each sample. With longer daylength plant height and inflorescence length were increased but number of leaves including bracts and stem diameter were decreased. Leaves and bracts, stem, root, shoot and total dry weights were increased with longer daylength from late September while floret dry weight showed reverse result. Florets formed were the greatest in daylength of 10 hours during September but the least during the other period. Anthesis of the florets was observed only in daylength of 10 hours during October and all the plants from the treatment were flowered.

• The Science & Technology
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• no.8 s.423
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• pp.34-35
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• 2004

• Journal of Bio-Environment Control
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• v.22 no.3
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• pp.214-219
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• 2013

This study was conducted to examine the effect of LED light quality and treatment time on the growth and flowering in potted plants of Impatiens (Impatiens hawkerihybrid). Plant height of Impatiens was enhanced under Blue light, regardless of treatment time. Root length and stem diameter of Impatiens were enhanced by Red light or Blue light. The number of internodes was not influenced by LED light quality. The number of branches of Impatiens was increased under Blue light, but treatment time did not result in statistically significant differences. Leaf area was increased by all LED lights in Impatiens. The number of flower buds and open flowers was decreased by LED light, but days to flowering were reduced by Red light in Impatiens. Chlorophyll and anthocyanin content were not significantly affected by LED light, but anthocyanin content tended to increase by Blue light for 4 h after sunset. Fresh and dry weights were enhanced by Blue light in Impatiens.

• Horticultural Science & Technology
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• v.19 no.4
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• pp.568-573
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• 2001

The effects of foliar spray and soil drench application of triazole chemicals (diniconazole, myclobutanil, difenoconazole, tebuconazole, bitertanol, hexaconazole) on growth and flowering control in zinnia were investigated. For foliar spray application of tebuconazole, diniconazole and bitertanol on 'Dream Land Rose', plant height was decreased but tebuconazole gave the best result for dwarfing. Diameter, fresh and dry weights of flower were markably decreased at high concentration of tebuconazole. However, days to flowering was not affected by chemicals tested. For 'Dream Land Scarlet', plant height was decreased with all chemical treatments. Tebuconazole severely decreased plant height, in particulas. Diniconazole hastened flowering. For soil drench of 'Dream Land Rose', plant height was decreased by diniconazole and mycrobutanil, but diniconazole was more effective for plant height decrease. Flowering was hastened by diniconazole in both 'Dream Land Rose' and 'Dream Land Scarlet'. Plant height of 'Dream Land Scarlet' was decreased by all chemicals tested. Flowering was not occurred at $300mg{\cdot}L^{-1}$ myclobutanil with severe suppression of stem growth.

• Journal of Bio-Environment Control
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• v.31 no.3
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• pp.230-236
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• 2022

This study was carried out to produce two-flowered seedlings, harvest them early in a greenhouse, and extend the harvest period. This study was carried out to effectively produce the second truss blooming seedlings to harvest tomatoes early and extend the harvest period. For production of the second truss blooming seedlings (one stem), the nutrient solution EC was supplied at 1.5, 2.0, 2.5 dS·m^-1, and dynamic management (3.0 → 3.5 → 4.5 dS·m^-1). The seedling period was 60 days, which was 20-40 days longer than conventional seedlings, and 10 days longer than the first truss blooming seedlings (cube seedlings). The plant height was 78 and 77 cm in EC 2.5 dS·m^-1 and dynamic management respectively, which was shorter than EC 1.5 dS·m^-1 with 88 cm. As for the EC in the cube before formulation, dynamic management had the highest EC 5.5 dS·m^-1, and the cube supplied with EC 1.5 dS·m^-1 had the lowest. The production yield by treatment did not a difference among in the second truss blooming seedlings, but the first truss blooming seedlings showed lower productivity than second truss blooming seedlings. The second truss blooming seedling were harvested 35 days after planting on June 4, the first harvest date, and the first truss blooming were harvested in 42 days on June 11th. There was no difference in plant height and root growth due to bending at frequency planting. In the study on the production of the second truss blooming seedlings (two stem), the nutrient solution EC was supplied under 2.0, 2.5, 3.0 dS·m^-1, and dynamic management (3.0 → 3.5 → 4.5 dS·m^-1). The seedling period was 90 days, which was 40-50 days longer than conventional seedlings and 10 days longer than the first truss blooming seedlings (cube seedlings). Plant height was 80 and 81 cm in EC 2.0 dS·m^-1 and 2.5 dS·m^-1 respectively, but was the shortest at 73 cm in dynamic management. EC in the medium increased as the seeding period increased in all treatments. The dynamic management was the highest with EC 5.1 dS·m^-1. There was no difference in yield among EC treatments in the second truss blooming seedlings, which had a longer seeding period of about 10 days, produced 15% more than the first truss blooming seedlings. In order to shorten the plant height of the second truss blooming seedlings, it is judged that the most efficient method is increasing the concentration of nutrient solution.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2003.10a
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• pp.143-151
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• 2003