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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Horticultural Science and Technology
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Korean Society of Horticultural Science
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Effect of Planting Date on the Growth and Yield in Retarding Culture of Squash (Cucurbita maxima) under Rain-shielding Condition
Seong, Ki-Cheol ; Lee, Jae-Wook ; Kwon, Hyeog-Mo ; Moon, Doo-Yong ; Kim, Chun-Hwan ; Seo, Hyo-Duk ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 143~146
The study was conducted to determine the optimum planting date for the production of the high quality squash adapted in retarding culture under rain-shielding condition. ‘Ebisu’ variety was planted at six different times from August 10 to September 30 at 10-day intervals. The growth rate was similar among the treatments until the planting of August 30, but after planting date of September 10, it was inferior. The first female flowering dates were 28 to 38 days after planting but they were shortened as planting date was late. First flowering setting node was higher (25 to 30th node) when planted before August 30, but it was lowered to 18th node when planted after September 10. The sizes of first and second fruit were the largest when planted on August 20, and the second fruit was not set when planted after September 20. The average fruit weight was the heaviest as 1,758g when planted on August 20, and they can be harvested from the mid-November. The soluble solid contents were not different among treatments (10 to 11
Bx) when planted before August 30, but they were severely decreased to 6
Bx below when planted after September 10. Marketable yield per ha was the highest (58,000kg) when planted Aug. 20, and moderate (38,000kg/ha) when planted between August 10 and 30, but it was severely reduced with the late planting date. Therefore, based on marketable and quality, the optimum planting date in the Jeju was considered Aug. 20 in retarding culture of squash under rain-shielding condition.
Inhibition of Algae Occurrence during Lettuce Cultivation in Hydroponics by NaOCl and Several Treatments
Lee, Sang-Woo ; Lee, Su-Yeon ; Seo, Myeong-Whoon ; Lim, Jae-Wook ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 147~150
Occurrence of various algae in hydroponic systems is limiting factor against lettuce cultivation with high quality and quantity. In order to control algae, nutrient solution for lettuce was treated with 1 ppm CuSO_4, 12ppm NaOCl, 100ppm humus, and black and white film mulching (BWM). In the both BWM and 100ppm humus treatment, algae was completely controlled, but lettuce growth in BWM was inhibited. Application of NaOCl inhibited algae occurrence by 95% and increased lettuce yield by 20% as compared to control. In order to investigate proper concentration of NaOCl for control of algae occurrence and plant growth, lettuce growth element was examined during 2 times successive cultivation after treatment of several concentration of NaOCl. NaOCl was treated only at the first culture, but not treated in the second culture. At the first culture, Fresh weight of lettuce was increased in NaOCl treatment at 12ppm and 24ppm than that in control, but severely decreased at the second culture in 24ppm and 48ppm treatments. With increasing NaOCl concentration, lettuce yield became more decreased. Analysis of inorganic elements plant showed that NaOCl treatment increased Na and Cl absorption but inhibited the absorption of Ca, K, and P. NaOCl treatment also reduced bacteria population in the nutrient solution.
Effect of Selenium Source and Concentrations on Growth and Quality of Endive and Pak-choi in Deep Flow Culture
Yun, Hyung-Kweon ; Seo, Tae-Cheol ; Park, Dong-Kum ; Choi, Ki-Young ; Jang, Yoon-Ah ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 151~155
To increase the selenium content in endive and pak-choi, sodium selenate, sodium selenite, and Se-amino chelate compound were treated at various concentrations in hydroponic nutrient solution for 7 days before harvesting. The growth decreased with increasing the concentration of selenium in hydroponic solution. Especially, sodium selenite highly reduced the vegetative growth compared to the other source application and the 8 mg․L^1 treatment decreased the fresh weight and leaf area by 2.3- and 1.8-fold, respectively, than control. The ascorbic acid contents were higher by 1.2-fold, 71.4 mg․kg^-^1 FW in 8 mg․L^-^1 sodium selenate treatment plot than control. Nitrate concentration including the other mineral nutrients was decreased. However, the selenium content linearly increased with increasing the selenium concentration in hydroponic solution.
Foliar Application on the Storability of Muskmelon Cultured in NaCl-enforced Hydoponic
Kwak, Ki-Wung ; Park, Sung-Min ; Park, Jong-Nam ; Jeong, Cheon-Soon ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 156~161
During the hydroponic culture of muskmelon, the effect of adding NaCl in nutrient solution and supplying CaCl_2 on the leaves of muskmelon on respiration and the changes in fruit quality during storage was evaluated. The rate of respiration was higher in fruit with NaCl treatment, but lower with CaCl_2 treatment than in control. The rate of respiration was much lower in fruit stored at low temperature, 5
C, than at room temperature, about 26
C. Same trends were obtained in the production of ethylene at low and room temperatures. The pulp firmness was lower in NaCl treated fruits, while higher in CaCl_2 treated fruits. Muskmelon fruits from control without CaCl_2 application were stored about five days at room temperature, whereas fruits treated with CaCl_2 can be stored about 20 days at low temperature. Soluble solid and total sugar contents in muskmelon fruit were higher in the both NaCl and CaCl_2 treatment than in control. The contents in fruits from NaCl treatment decreased during storage. The concentration of ethanol was much higher in NaCl treated fruits, but treatment with NaCl produced low amount of ethanol. NaCl treatment can produce high concentration of sugars in muskmelon fruits, but the shelf-life was decreased in the fruit. The storage problem can be avoided by the leaf application of CaCl_2.
Quality Improvement of Onion by Cultural Managements, Pre-harvest Treatments and Storage Methods under Storage at Room Temperature
Lee, Chan-Jung ; Kim, Hee-Dae ; Lee, Jong-Tae ; Cho, Yong-Cho ; Song, Geun-Woo ; Choi, Chil-Koo ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 162~168
This study was conducted to improve storability of onion bulbs by cultural methods, pre-harvest treatments and storage methods under room temperature, and to reduce the rot occurred in a field open storage from 2001 to 2002. Allium cepa cv. ‘Changnyungdeago’, late strain, was used for the test under four conditions; field stacking as control treatment, and three common storage methods under non-ventilation, one-row forced ventilation, and two-row forced ventilation conditions. The difference in onion growth between farmhouse practice and experimental station cultivation was not significant, but the yield of onion bulb increased a little with treatment of farmhouse practice. Average and maximum temperature was higher in common storage than in farmhouse field-storage. Among ventilation treatments in common storage, mean temperature was 1.2～4.8
C lower in two-row forced ventilation than in non-ventilation. The relative humidities were 69.9～87.4%, 40.9～72.3% and 43.6～75.8% in farmhouse practice, non-ventilation and two-row forced ventilation, respectively. The rotting incidence in farmhouse practice and non-ventilation by the early of September were 24.3% and 18.3%, respectively, while 10.0% and 9.0% in two-row forced ventilation and one-row forced ventilation. Total weight losses by the early of September were 30.0%, 21.3%, 15.2% and 13.7% in farmhouse practice, non-ventilation, two-row forced ventilation, and one-row forced ventilation, respectively. The rot of onion bulbs was mainly caused by Botrytis sp., Aspergilus sp., Fusarium sp. and some bacteria. The bulb rots in farmhouse practice and non-ventilation were caused by Aspergilus sp. and some bacteria in one-row forced ventilation. Basal rot of onion bulb caused by Fusarium sp. in farmhouse practice was lower than that of any other treatment. Optimum preharvest and postharvest procedures suggested were N-K_2O liquid fertilization, six applications of calcium nitrate (0.1%, 1000 L․ha^-^1) at 15-day intervals at growth stage, calcium carbonate spray (6%, 1000 L․ha^-^1) into cut stems of onion at harvest stage, field-dry for 2～3 days after harvest. Common farmhouse storage with forced ventilation facilities reduced rot of onion bulb that usually occurs during storage at room temperature.
Plant Growth and Pyruvic Acid Contents of Garlics (Allium sativum L.) Stored at Different CA Conditions
Bae, Ro-Na ; Yun, Sang-Don ; Mok, Il-Gin ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 169~172
The study was carried out to investigate the effect of CA storage on the growth of two garlic cultivars, ‘Namhae’ (the southern ecotype) and ‘Danyang’ (the northern ecotype). These cultivars were stored in controlled atmosphere (CA) condition, the combination of O_2 and CO_2 were 1% and 5%, 1% and 10%, 3% and 5%, 3% and 10%, and the control was room temperature condition. After storing 120～135 days, the bulbs were seeded. Bulb weight and bulb diameter were higher in both ecotype cultivars in control than in other storage conditions. Among CA storage conditions, O_2 3% + CO_2 5% in ‘Namhae’ and O_2 3% + CO_2 10% in ‘Danyang’ were highest in bulb weight. Plant height and the number of leaves were highest at O_2 3% + CO_2 5% CA condition in ‘Namhae’ and room temperature storage of ‘Danyang’. Pyruvic acid content was highest at control in both cultivars. The difference of pyruvic acid contents among CA storage conditions was not significant. In conclusion, it was not recommendable to use as seeds those bulbs stored under CA conditions.
Seasonal Variation of Quality of Tomato Fruit (var. 'York') during Ripening on the Vine
Park, Se-Won ; Ko, Eun-Young ; Lee, In-Kwon ; Lee, Mi-Rim ; Hong, Sae-Jin ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 173~176
Quality of tomato fruit in different growing season (winter and spring) was compared to establish the optimal harvesting stage, especially for tomato export. Tomato (‘York’ cultivar) fruits were harvested at different ripening stages (pink, light red, and red) and the quality factors were evaluated including taste factors, dry matters, firmness, pigment contents and Hunter values of fruit. Soluble solid contents were 7.4% and 4.2% and titratable acid contents were 7.8 ㎎･g^-^1 FW and 3.0 ㎎･g^-^1 FW in light red fruits grown in spring and in winter, respectively. Pigment contents were: 101.7
g･g^-^1 FW and 72.1
g･g^-^1 FW of carotene and 69.3
g･g^-^1 FW and 54.5
g･g^-^1 FW of lycopene in fruit grown in spring and in winter, respectively. Hunter a value was 17.2 in tomato grown in winter, which was higher than that in tomato grown in spring. According to the taste and color factors of fruit quality, tomato fruits had to be harvested at light red stage of ‘York’ for high marketable quality.
Relationship between Physicochemical Quality Attributes and Sensory Evaluation during Fruit Maturation of Cucumber
Park, Se-Won ; Lee, Ji-Won ; Kim, Young-Cheol ; Kim, Kwang-Yong ; Hong, Ji-Heun ; Lee, Mi-Rim ; Hong, Sae-Jin ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 177~182
Suitable indices for the marketable quality of cucumber fruit were evaluated through the correlation study between instrumental and sensory quality attributes. Three cucumber cultivars, ‘Baekdadaki’, ‘Chungjang’ and ‘Sharp’ were harvested at five maturity to investigate relationship between quality factors and sensory test. Fruit maturity was simply judged by fruit size from extra small to extra large. The significant correlation coefficient values were determined (more than r=0.55) between the sensory sweetness and the contents of soluble solids, soluble sugars, fructose, and glucose. The results suggested that content of all the sugars were suitable for the sweetness index of cucumber, especially soluble sugars for ‘Baekdadaki’ (r=0.7823), soluble solids for ‘Chungjang’ content (r=0.8207), and glucose for ‘Sharp’(r=0.6486), respectively. The high coefficient value (r=-0.7555) between dry matters and mouth-feel texture suggested that the dry matter was suitable as an indicator for the texture of ‘Baekdadaki’. ‘Chungjang’ and ‘Sharp’ cultivars showed significant correlation coefficient value more than r=0.5 between firmness and texture. There were no significant correlations between Hunter values and chlorophyll content regardless of maturity stages. The cucumber quality was mainly dependent on sweetness and flesh texture, thus suggesting that the two factors are decisive quality factors for ‘Baekdadaki’, while soluble solids content and soluble sugars for ‘Chungjang’. For ‘Sharp’ cultivar, the new standard of quality indices might should be developed and introduced since significant relationship between previous quality indices and panel test were low or not found.
Topping, Flower Pinching Treatment for Increasing Yield of Codonopsis lanceolata and Development of Propagation Method by Cutting
Kim, Hag-Hyun ; Hwang, Ju-Kwang ; Shin, Un-Dong ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 183~187
For the purposes of easy cultivation, yield increase and mass-propagation, present experiments were carried to examine the effects of topping and flower pinching on the root growth and the effects of cuttings with different internode positions on the adventitious root formation and growth characters of Codonopsis lanceolata. Compared to control, topping treatments generally reduced the diameter and fresh weight of main roots, except in 120cm topping in which there was significant difference with control. The fresh weight of lateral roots was not influenced by topping. Root length and diameter seemed to be increased by flower pinching but no statistical significance was observed. Number of lateral roots and root fresh weight were influenced by flower pinching. Pinching of all the flower (100% pinching) resulted in the highest yield. Cutting of 1～3 internode positions induced high root formation in both Korean (Cheongju) and Japanese species. Especially, the latter produced 40% adventitious root formation with Rootone powder treatment. Paclobutrazol treatment of cuttings resulted in 67～93% root formation. The highest root formation rate was 93% obtained by 10mg․L^-^1 treatment, which was almost four times of that in control.
Breeding of 'Excu 1' in White Spine Cucumber
Seo, Jong-Bun ; Choi, Kyong-Ju ; Lee, Yong-Hwan ; Kim, Hyeon-Woo ; Yang, Won-Mo ; Chung, Soon-Ju ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 188~191
A new white spine cucumber (Cucumis sativus L.) variety, ‘Excu 1’ was selected by cross of ‘Naoyoshi’ (Saitama Vegetable Breeding Co., LTD, Japan), mother plant and ‘Sharp 5’ (Saitama Vegetable Breeding Co., LTD, Japan), father plant, from 1998 to 2000 in Jeonnam Agricultural Research and Extension Services. The new cultivar was vigorous and significantly resistant to brown leaf spot symptoms. The percentage of female flower and lateral shoot occurrence was 76% and 72%, respectively. The yield increased by 43.2MT/ha, 8% more than check variety, ‘Baekseong 3’.
'Aragaya', A New Cluster-Type Tomato for Protected Cultivation
Jeong, Hae-Boong ; Rno, Il-Rae ; Cho, Mi-Ae ; Cheong, Jae-Woan ; Kim, Hoe-Tae ; Kang, Kwang-Yoon ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 192~194
‘Aragaya’ is a newly bred cluster-type tomato for protected cultivation. This cultivar was developed from a single cross between ‘GCR26’ and ‘Momotaro-york’ was selected by pedigree breeding. ‘Aragaya’ is an indeterminate type cultivar, and has fairly short internode. It bears round fruits that have colorlesss skin and red fruit flesh. The number of locule is 2 or 3. The soluble solid contents of the fruits are about 7
Bx. It is resistant to tomato mosaic virus, fusarium wilt and moderately resistant to leaf mold disease. This cultivar can be planted in the protected cultivation area anywhere in Korea.
Effect of Fertigation System on Fruit Quality and Tree Growth in Apple (Malus domestica Borkh)
Park, Moo-Yong ; Kang, In-Kyu ; Yang, Sang-Jin ; Cheung, Jai-Kwon ; Byun, Jae-Kyun ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 195~199
The study was carried out to investigate effects of fertigation on the tree growth, fruit quality and yield in 4-year-old ‘Fuji’/M.26 apple trees for four years from 1996 to 1999. The treatments were prepared with liquid refining fertilizer (RF, N:P:K=10:5:7.5 kg/10a) and commercial liquid fertilizer, Polyfeed-52 (PF-52, N:P:K=17:8:26 kg/10a). The control (N:P:K=10:5:7.5 kg/10a) was prepared with nitrogen, potassium and phosphate. Nitrogen and potassium were applied 60% basal fertilizer and 40% side dressing. Phosphate was applied with 100% basal fertilizer for this experiment. The length of internode and the average length of shoot were shorter in RF and PF-52 treated apple trees, but there was no difference in the number of shoots and length of the terminal shoot. The average fruit weight was slightly heavier in the treatments than the control, but there was no difference in the fruit number among treatments. In addition, the content of soluble solids and hardness were higher in RF and PF-52 treatments. Fruit coloring in the treatment was much brighter than the control as Hunter ‘a’ value was higher and ‘b’ value was lower. Phosphate content in leaves was higher in RF and PF-52 treatment, and nitrogen, potassium, calcium and magnesium contents were not different. Nitrogen and potassium content in soil were a little bit changed through RF and PF-52 treatment, but those of the control was higher between June and September. The results indicated that fertigation seemed to be useful for the better coloration and increase of nutrient uptake efficiency in the production of fruits with high quality and stabilization of tree growth in ‘Fuji’/M.26 apple trees.
Effects of Forms and Levels of Nitrogen and Levels of Calcium on Bitter pit Incidence in 'Fuji' Apples (Malus domestica Borkh.)
Kim, Mong-Sup ; Ko, Kwang-Chool ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 200~205
The study was conducted to determine induction of bitter pit in apples. Different forms and levels of nitrogen and levels of calcium were applied to water culture to examine bitter pit incidence and mineral contents of fruits and leaves. The NH_4-N group showed significantly higher nitrogen contents in both fruits and leaves than those of the NO_3-N group. However, calcium concentrations were decreased in the group of NH_2-N. The NH_2-N group showed the middle range in contents of nitrogen and calcium. Bitter pit incidence in the NH_4-N group was the highest among the treatments. Bitter pit incidence tended to be decreased as the nitrogen level reduced. As the calcium level increased, calcium contents in fruits and leaves were significantly increased, while those of nitrogen, N/Ca ratio, and bitter pit incidence decreased. Therefore, the results of this study suggested that bitter pit incidence was highly to nitrogen and calcium concentrations of fruits and leaves in apples.
Effects of Soil Water Potential Control by Drainage Canal plus Porous Water Proof Sheet Mulching on the Fruit Quality of Satsuma Mandarin in Citrus Orchards
Kim, Yong-Ho ; Rno, Il-Rae ; Go, Sang-Uk ; Moon, Doo-Kyung ; Kim, Seung-Hwa ; Choi, Yong-Hoon ; Kim, Chang-Myung ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 206~211
The experiment was carried out to determine the effect of drainage canal + reflecting sheet (porous water proof sheet, PWPS) mulching on the fruit quality of satsuma mandarin in three citrus orchards located in Hamduck, Kosan, and Namwon areas, Jeju, Korea. The 25-year-old citrus trees, which were planted densely, were thinned at alternate planting. The soil was prepared for drainage by 50×50 cm (W×D) canal system in March. Soil was then mulched with reflecting PWPS sheet, starting from early August. Soil water potential was measured at 30 cm of soil depth under tree canopy. Results showed that soil water potential in Kosan district decreased very rapidly compared with those in other districts. Water potential in drainage canal +PWPS mulching plot also decreased much more rapidly than control. Peel coloration (Hunter a value) was higher in drainage canal + PWPS mulching treatment than in control. Fruits matured earlier in drainage canal + PWPS treatment than in control. Soluble solid content was highest in fruits from Kosan, 12.8
Bx, followed by that from Hamduck, 11.7
Bx, and Namweon, 11.1
Bx. Acidity was higher in fruits from Kosan and Namwon compared with Hamduck, which were 1.23%, 1.51%, and 1.51%, respectively. Acidity of fruit in control and drainage canal + PWPS mulching plot were 1.04% and 1.42%, respectively, indicating that acidity of fruit from reflecting sheet mulching plot was higher than that of fruit from control.
Selection of Crabapples as Pollinizers for 'Hongro' Apple Cultivar
Kang, In-Kyu ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 212~215
Five crabapples, ‘Manchurian’, ‘Sentinel’, ‘Yantaishagou’, ‘Hopa A’ and ‘SKK14’, were evaluated as pollinizers of ‘Hongro’ apple tree for their flowering times, percentage of pollen germination, fruit setting, and disease and pest resistance. Flowering dates of ‘Manchurian’, ‘Yantaishagou’, and ‘Hopa A’, which ranged from April 19 to May 1, coincided with ‘Hongro’ apple cultivar. Those three crabapples had high percentage of pollen germination rate and fruit set pollinated with ‘Hongro’. They were resistant to apple blotch, sooty blotch and fly speck. Fruit characteristics of ‘Hongro’ cultivar pollinated with any of three crabapples were similar to open pollinated fruits. The results suggested that three crabapples, ‘Manchurian’, ‘Yantaishagou’, and ‘Hopa A’, could be suitable pollinizers for ‘Hongro’ apple cultivar.
Effect of 11 Pre-emergence Herbicides on Vegetative Establishment of Zoysiagrass (Zoysia japonica)
Woo, Kyung-Jin ; Yang, Geun-Mo ; Choi, Joon-Soo ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 216~222
Experiments were conducted to evaluate the weed control efficiency of 11 pre-emergence herbicides on the vegetative establishment rate of zoysiagrass by strip sodding. Herbicides were applied seven days after strip sodding. Use rates were 50%, 100% and 200% of recommendation from supplier, and spray volume of water was 26 mL․m^-^2. Prodiamine (WG) and pendimethalin (EC) resulted in relatively good coverage at 50% of recommended rates. Treatments with pendimethalin (SC), pendimethalin (EC) and oryzalin (SC) resulted in the average coverages of 153.7%, 141.9% and 141.9%, respectively compared to control plots in 198 days. Annual grassy weed control rates in 80 days after treatment by pendimethalin (SC), napropamid (WP) and oryzalin (SC) were 93.6%, 90.0% and 83.1%, respectively even at the 50% rates of recommendations. Annual broad-leaf weeds were remarkably controlled even at the 50% rates of recommendations by all the herbicides except napropamid (WP). As an over all conclusion oryzalin (SC), pendimethalin (SC, EC) were believed to be good pre-emergence herbicide to use at the early stages of vegetative zoysiagrass propagation.
Differences in Water Uptake by Stem-end Treatments of Cut Rose Flowers
Joo, Na-Ri ; Lee, Jung-A ; Pak, Chun-Ho ; Suh, Jung-Nam ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 223~227
To optimize stem-end cutting method under transport stimulation conditions, water uptake potential was investigated in Rosa x hybrida, ‘Calipso’ and ‘Vital’ roses. Seven stem-end cutting methods were applied to roses with or without transport simulation. During storage at 15
C and 25
C, ‘Calipso’ rose showed largest water uptake by treatment of sharp-diagonal cut, while least water uptake by rough-horizontal stem-end cutting at both the temperatures. In the experiment of transport simulation combined with cutting treatments using ‘Vital’ roses, water uptake was significantly higher in sharp-diagonal treatment than in rough-horizontal treatment after transport simulation. Fresh weight was heavier by sharp-diagonal stem-end treatment than by rough-horizontal stem-end treatment. In contrast, there was no significant difference in water uptake and fresh weight between the cutting treatments when roses were not transport-simulated. Starting from the 5th day of the treatment, water balance began to reversed when water transpiration rate was higher than uptake in each treatment. Additional experiment on cutting area indicated that water uptake tended to increase in proportion to cutting areas.
Characteristic and Vase Life in 36 Cultivar of Cut Gerbera Flowers
Kim, Young-A ; Choi, Sung-Ryul ; Kweon, Oh-Keun ; Joung, Hyang-Young ; Shin, Hak-Ki ; Lee, Jong-Suk ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 228~235
The study was conducted to investigate the differences in vase life, fresh weight, water uptake, water balance, and flower diameter in the thirty-six cultivars of the cut gerbera (Gerbera hybrida) flowers. The vase life was significantly different among the cultivars. The vase life of ‘Beauty’ (15.9 days), ‘Estelle’ (15.5 days), ‘Rita’ (15.4 days) ‘Event’ (15.3 days), and ‘Rodis’ (15.0 days) was three times longer than that in ‘Red Ball’ (4.9 days) and ‘Vital’ (4.8 days), which have short vase life. The incidence of scape deformation was 100% in ‘Lilabella’, ‘Red Ball’, ‘Mirage’, ‘Moana’, ‘Tamara’, ‘Sarinah’, ‘Ramona’, ‘Rosamette’, ‘Vital’, and ‘Pinkie’, but it was 0% in ‘Rodis’, and ‘Rusia’. The fresh weight initially increased in one day after harvest, and then decreased until senescence. The fresh weight of cultivars showing long vase life showed a slight decrease, the cultivars showing long vase life decreased largely. The water uptake in ‘Beauty’ showing a long vase life increased 1.4 times in the fourth day after harvest and was maintained highly until senescence. However, the water uptake in ‘Red Ball’ showing a short vase life cultivar was small as compared with ‘Beauty’ being long vase life, at the first day after harvest. The change in the water balance of the several cultivars showed the minus value at the second day after harvest. The flower diameter in all flowers gradually decreased after harvest. Cut gerbera cultivars having short vase life showed a little water uptake and the water balance of them changed rapidly to the minus value. Therefore, poor water balance in gerbera was one of cause of gerbera senescence.
Prolongation Vase Life in Cut Lilium longiflorum 'Georgia' by Ethylene Inhibitors and Plant Growth Regulators
Byun, Mi-Soon ; Han, In-Ja ; Kim, Kiu-Weon ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 236~241
The study was conducted to develop the substitute substance of STS (silver thiosulfate) with cut Lilium longiflorum ‘Georgia’. Ethylene inhibitors, AVG (aminoethoxyvinyl glycine) 0.6mM, AIB (
-aminoisobutyric acid) 5mM, and ethanol 2% treatment prolonged vase life longer than STS treatment. Anther removal treatment was more effective than stigma removal treatment. Combination treatment of GA_3 and BA 25mg․L^-^1 was very effective for the inhibition of leaf yellowing. Chlorophyll content was maintained for a long time in contrast with control. The selected treatment for the prolongation of vase life was AIB 5mM + GA_3 25 mg․L^-^1 + BA 25 mg․L^-^1 + anther removal treatment.
Survey for Technology Forecasting using Delphi in Horticultural Science
Hwang, Jun-Gu ; Lee, Jong-In ; Lee, Jung-Myung ; Cho, Keun-Tae ; Cho, Yong-Gon ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 242~250
The study was designed to forecast and derive future core technologies using Delphi method in Korea horticultural agriculture. The technologies will make agriculture for core and strategic industry that has high value-added in 21 century. Questions were given to specialists by each technology in order to survey importance, realization time, level of R&D in Korea and foremost country, leading group of R&D, effective policy, etc. for each technology. The target of the survey for Delphi is confined to specialists in the area of horticultural science. Eighty seven core technologies were derived and these were further classified based on the importance and technological differences as compared to well-advanced countries by 42 specialists who answered the survey.
Technology Forecasting Survey on Postharvest Management Using Delphi Method
Cho, Keun-Tae ; Park, Youn-Moon ; Shin, Dong-Hwa ; Lee, Jong-In ;
Korean Journal of Horticultural Science and Technology, volume 22, issue 2, 2004, Pages 251~259
The study was designed to forecast and derive future core technologies using Delphi method for the postharvest management in Korea. The target of the survey for Delphi is confined to specialists in the area of postharvest technology. Sixty-three core technologies for the future were first derived through broad survey by 12 specialist panels and Delphi survey was performed on the selected technologies based on the answers from 23 specialists. Questions were given to each specialist groups corresponding to the selected technology in order to survey importance, realization time, level of research and development (R&D) in Korea and foremost country, leading group of R&D, effective policy, etc. Realization time expected was within the year of 2010 for all the technology. Time differences from that in developed countries were 0 year for 5%, one year for 22% and two year for 44% of technologies indicating that level of postharvest technologies in Korea were close to that in the developed countries. Among the 6 sub-class areas of postharvest agriculture, importance index was highest, reaching 78.4%, in the area of quality control. In contrast, technology development level was highest in the area of distribution, which was evaluated as 66.8%. Combined analysis of the importance index and the development level suggests 16 technologies which have high developing potential. More than 50% panelists preferred industry-university-research center cooperation as a desirable approach to technology development. Likewise, most preferred technology developer was industry-university cooperative. As the most basic supporting policy for technology development, expansion of research fund was ranked on the top receiving 34% positive answers. The results of the present survey could be used as a strong tool to make agriculture for core and strategic industry that has high value-added in the 21st century.