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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 Seedling Age and Plug Cell Size on Seedling Quality, Lateral Vine Development, and Yield in White-spine Cucumber
Yu, Young-Mi ; Lee, Ji-Weon ; Kim, Kwang-Young ; Kim, Yeong-Cheol ; Lee, Sang-Gyu ; Seo, Tae-Cheol ; Yun, Hyung-Kweon ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 5~9
This study was conducted to examine the effect of seedling age and plug cell size on seedling quality, early lateral vine and yield of the white-spine cucumber. Cucumber cultivar ‘Bagseong 3’ was sown on Aug. 25 (3-week old seedling after grafting), Sep. 4 (2-week old seedling after grafting), and Sep. 11 (1-week old seedling after grafting), grafted with ‘Superunyoung’ raised in 50 (78 mL), 32 (200 mL), and 18-cell (350 mL) plug tray filled with peatmoss- based substrate, and transplanted on Sep. 25. The seedling growth increased with seedling age and cell size. Photosynthesis and root activity were the highest in 2-week old seedling after grafting, but not affected by cell size. The growth of 4-week old seedling after transplanting showed the same tendency as seedling growth and the number of lateral vines gave the highest in 3-week old seedling raised in 32-cell plug tray. The number of early marketable fruits and yield of main and lateral vine increased with seedling age and cell size, and was the highest in 3-week old seedling raised in 18-cell plug tray, but there was no difference between 2- and 3-week old seedling.
Effect of Root Zone Temperatures on the Early Growth of 'Seokun' and 'Kakemusa' Tomato in Hydroponics
Kim, Young-Suk ; Huh, Moo-Ryong ; Park, Joong-Choon ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 10~14
The experiment was carried out to examine the effect of root zone temperatures on the early growth characteristics and mineral concentrations in ‘Seokun’ and ‘Kakemusa’ tomato grown in hydroponics. Root zone temperatures were of either ambient, 10, 15, or 25
, while the lowest night temperature was kept at 10
. Plant height, leaf number, fresh and dry weights of shoot and root, and crown diameter were significantly different between both cultivars. Plant growth was best at 25
among all temperatures tested and the ambient treatment showed the lowest plant growth. The chrolophyll concentrations were increased as the days elapsed from transplanting in ‘Seokun’. However, the similar results were not observed in ‘Kakemusa’ even a 10 days after transplanting at all root zone temperatures. The anthocyanin contents were higher at 10
root zone temperature than 15 and 25
in both cultivars. The mineral concentrations were changed according to root zone temperatures. T-N and P were high in 25℃ root zone temperature and Na concentrations were high in ambient, whereas Mg and Ca were not affected by root zone temperatures.
Effects of Transplanting Method of Seedlings on the Growth and Yield of Paprika
An, Chul-Geun ; Kang, Dal-Soon ; Rho, Chi-Woong ; Jeong, Byoung-Ryong ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 15~18
This study was conducted to investigate the effect of transplanting method of seedlings on the growth and yield of paprika (Capsicum annum cv. Spirit) cultivated in rockwool. Three methods of transplanting the seedlings were tested with rockwool culture : transplanting upright position in rockwool block (I-type), bending the seedlings
(L-type) and bending the seedlings
to face the roots upward position (U-type). The height of seedlings was shorter at U-type than I-type, especially the stem length to the first leaf was shortest at U-type. The number of leaf was more at U-type than L-type, and the leaf area was wider at U-type than I-type. U-type gave the highest yield of 9,447kg/10a.
Effect of Vining Scheme on the Growth, Quality and Yield of Oriental Melon (Cucumis melo L. var. makuwa Mak.)
Bae, Su-Gon ; Park, So-Deuk ; Sin, Yong-Seup ; Yeon, Il-Kweon ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 19~24
Oriental melon was usually cultivated in the form of creeping cultivation without any vining scheme in greenhouse with no heating system. Although the cultivated area was in an increasing trend in larger greenhouse, the creeping cultivation was unable to increase the fruit quality and yield due to its unfavorable environment. This experiment was conducted to investigate growth, fruit quality and yield by introducing four vining schemes: creeping cultivation, tunnel, line, and frame vining scheme. Creeping cultivation had higher temperature at fruit-setting position but lower light interception ratio by shading of leaves. Length, width, soluble solid and fresh thickness of fruit were highest in frame vining scheme, and fruit weight was 49 g more than that in creeping cultivation of 388 g. Creeping cultivation had rotten and cracked fruits as high as 675 kg per 10a, which was 71% higher than frame vining scheme, and marketable fruit yield of 1,779 kg per 10a was 1030% lower than three vining schemes. Yield was highest with frame vining scheme. Line and frame vining schemes, which had better air circulation and light interception than creeping cultivation, and were more effective in increasing larger fruit size and fruit color.
Occurrence and Chemical Control of Downy Mildew (Pseudoperonospora cubensis Rostowzew) infecting Oriental Melon (Cucumis melo L. var. makuwa Makino) in Plastic Greenhouse
Yeon, Il-Kweon ; Sin, Yong-Seup ; Do, Han-Woo ; Bae, Su-Gon ; Park, So-Deuk ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 25~28
Occurrence of downy mildew infecting oriental melon in Seongju area was observed during Apr. 1 Apr. 17 yearly. To control downy mildew (Pseudoperonospora cubensis Rostowzew) infecting oriental melon in greenhouse, three fungicides were tested for two years. Metalaxyl․mancozeb and Dimethomorph․mancozeb WP had 93% control with 4-successive treatments, but the effect of Fosetyl-Al was dropped in the 2nd year, it was relatively wet, with higher downy mildew incidence. When a disease incidence rate was getting higher, the ratio of malformed fruits was increased and the fruit size and marketable yields were also dropped.
Improvement of Rooting of Stem Cuttings Propagated In vitro through Hydroponics in Potato
Kim, Sung-Yeol ; Chang, Dong-Chil ; Kim, Hyun-Jun ; Shin, Kwan-Yong ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 29~31
Shoot reared in vitro is widely used in hydroponic seed tuber production system in potato. Its major disadvantages in use is that thin and weak shoot can not be planted directly on hydroponic culture bed. Therefore, this study was conducted to improve the rooting of stem cuttings propagated in vitro through hydroponic culture system. In vitro shoots were grown in solutions for 30 days, stems were stem-cut, and transplanted into aeroponic culture bed. Early growth of roots and stem cuttings were increased in aeroponics than in conventional media rooting system composed of perlite and peatmoss. On 60 days after planting, these differences had no statistical significance. Plant growth and tuber yield on 90 days after planting were not different between the two rooting media. Considering these results, potato stem cuttings of in vitro shoots should be rooted in aeroponic culture system.
Effect of Characteristics of the Bags and Microclimate in the Bags on Russet of 'Whangkeumbae' Pear Fruit
Han, Jeom-Hwa ; Hong, Kyung-Hy ; Jang, Han-Ik ; Jo, Il-Hwan ; Choi, Jang-Jeon ; Lee, Hee-Jae ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 32~37
The study was conducted to obtain informations on the relationship between microclimate inside the bag and the occurrence of russet on ‘Whangkeumbae’ pear fruits. As the temperature inside the bag was increased or as the relative humidity was decreased, the russet development in ‘Whangkeumbae’ pear fruit skins was slightly retarded. Light reflectance, water permeability, water absorbance, and water condensation of the bag were positively correlated with russet development, but temperature in the bag and light transmittance of the bag were negatively correlated. Thus, the russet development on ‘Whangkeumbae’ pear fruit skins might be influenced by water condensation on the fruit skin. Temperature and relative humidity inside the bag, and water condensation onto a bag were found to be correlated with physico-chemical characteristics of the bag, such as light reflectance, absorbance, and transmittance, and water permeability and absorbance.
Selection of Transplanting Soil for Acclimatization of in vitro Cultured Grapevine Plantlets
Hong, Su-Young ; Kim, Si-Dong ; Lee, Yun-Sang ; Choi, Sung-Yeol ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 38~41
This experiment was carried out to select the optimal transplanting soil mixture for acclimatization of in vitro cultured grapevine plantlets. In vitro cultured grapevine plantlets of ‘Rizamat’ were transplanted onto five soil mixtures. The tested soil mixtures were vermiculite 100%, granulated cotton 100%, vermiculite 70%＋perlite 30%, vermiculite 70%＋peat moss 30%, and vermiculite 50%＋perlite 50%. Survival percentage of transplanted plantlets was high in the plantlets with more than 5 leaves at transplanting time. After 30 days of transplanting, the high survival percentage of plantlet was observed when plantlets were transplanted in granulated cotton 100% and vermiculite 70%＋peat moss 30%. The number of leaves, plant height and the length of root were highest in granulated cotton 100%. The root growth of transplant, in terms of root weight and root number, was best in vermiculite 70%＋peat moss 30%.
Effects of Root Pruning on Vine Growth, Flowering, and Fruit Ripening of Fertigated 'Campbell Early' Grape (Vitis labruscana B.)
Song, Nan-Jin ; Bang, Bo-Hyuk ; Eun, Jong-Seon ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 42~46
This study was conducted to investigate the effect of root pruning in fertigation on the growth, flowering, fruit ripening and yield in 5-year-old ‘Campbell Early’ grapevines under protected cultivation. Shoot length in the fertigation was greater than that in the no fertigation, and the shoot growth was much limited when the roots were pruned all around vines. Beginning and shedding of flowers and the rates of berry shattering in the no fertigation were significantly higher than in fertigation but increased with strong root pruning regardless of the fertigation. Cluster weight in the fertigation was higher than in the no fertigation and increased with strong root pruning in the fertigation but no significant differences were shown in root pruning method in the no fertigation. There was no difference among root pruning treatments in soluble solids regardless of fertigation. The rates of cracking in the no fertigation were higher than those in the fertigation and increased with heavy root pruning in the no fertigation but no significant differences were shown in the root pruning treatments in the fertigation. A start of harvest was quicker in the root pruning both in the fertigation or no fertigation than control. Harvesting period was shorter with heavy root pruning and shortened harvesting period when roots were pruned all around vine. The rate of standard cluster was higher in the fertigation than in the no fertigation, and the root pruning treatment between vines showed highest regardless of fertigation. Yield showed the same tendency on the rate of standard cluster.
Growth and Fruit Characteristics of Persimmon (Diospyros kaki Thunb.) Tree Grown in Heated Plastic House
Moon, Du-Young ; Ko, Kwang-Chool ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 47~50
To establish the cultural practices of persimmon in heated plastic house, the effects of heating dates on the growth of 4-year old ‘Nishimurawase’ persimmon (Dyospyros kaki Thunb. cv. Nishimurawase) tree planted in 80 L pot were investigated in a plastic film house heated above 18℃. When heating was started on Jan. 15, Feb. 15, and March 15, the days needed to break bud were 30, 19 and 5, respectively, showing the earlier start of heating prolonged the days to break bud. The same trends were evident from the bud break to full bloom. however, the days required from full bloom to harvest were accelerated by earlier heating. The dates of harvest were July 19, Aug. 19 and Sept. 16, respectively, showing earlier harvest of fruits when compared with ordinary harvest date of sept. 16 in the open-field. Percent of bud sprouting was 7071%, slightly lower than 77% in the open-field, and the length of new shoot was 30 cm in the house and 33 cm in the open-field. These were unaffected by the date of heating. Fruits produced in the plastic house turned out to be highly marketable with weight of above 170 g and Brix of 18.
Breeding of a Delicious, Large, Late Summer Season Pear Cultivar 'Sunhwang'
Hwang, Hae-Soung ; Kim, Whee-Cheon ; Sin, Il-Sheop ; Shin, Yong-Uk ; Lee, Don-Kyun ; Cho, Hyun-Mo ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 51~53
A pear cultivar ‘Sunhwang’ originated from the cross between ‘Niitaka’ and ‘Okusankichi’ bred by the National Horticultural Research Institute, Suwon and was released in 1996. The regional adaptability trials were carried out for 3 years from 1994 at nine fruit growing areas including Naju. It has strong tree vigor and semi-upright in tree form. It blossoms a day later than ‘Niitaka’, 3 days earlier than ‘Kosui’. The optimum harvesting time of ‘Sunhwang’ is September 9, 3 days later than that of ‘Kosui’ in Suwon. The fruit shape is roundish oblate and skin color is light yellowish brown. Average fruit weight and soluble solids content are 393 g and 13.2% in Brix, respectively. The flesh is soft and juicy, and has a little grit. It is resistant to black spot (Alternaria kikuchiana Tanaka).
Characterization and Optimal Condition for Mass Production of Streptomyces kasugaensis A12
Kim, Dong-Won ; Kim, Ji-Tae ; Choi, Sung-Won ; Choi, Kee-Hyun ; So, In-Sup ; Pak, Chun-Ho ;
Korean Journal of Horticultural Science and Technology, volume 20, issue 1, 2002, Pages 54~59
The specific aim of this study was to elucidate the characteristics and optimal conditions for the mass production of the isolated strain A12, which has a strong antagonistic activities against bulb rot in Cymbidium. The isolated strain A12 was identified as Streptomyces kasugaensis A12 by the International Streptomyces Project (ISP) classification and chemotaxonomic method. The effects of temperature, pH, fermentation time and media composition on mass production of Streptomyces kasugaensis A12 were investigated. The optimum fermentation condition of Streptomyces kasugaensis A12 was at pH 7.0, 30
and 96 hour. To produce a high antifungal activities, yeast extract was found to be most effective as a source of nitrogen, starch was effective for carbon and cobalt was for mineral ingredient.