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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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Effects of Training Methods of Main Stems on Yield and Labor Requirement for Forced Culture of 'Jikuyou' Eggplant (Solanum melogena)
um, Young-Cheol ; Sin, Young-An ; Lee, Jung-Su ; Boo, Hee-Ock ; Kang, Yong-Gu ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 171~174
During winter, the forced culture of eggplant needs training improvement to overcome low light conditions in the greenhouse. The experiment was carried out to investigate the effect of training method on plant growth, fruit quality and yield of ‘Jikuyou’ eggplant. Also, the labor efficiency with different training system was studied to provide information for eggplant growers. The training systems were open-center (U and V type) with 4-main branches and modified main branches with trimming angle (30
) on the U-type. The U-type training resulted in greater light intensity in the plant. However, the rate of stem growth was decreased as decreasing the trimming angles. The U-type with 45
was most favorable production system giving highest yield. Fruit quality was unaffected by the training system. The U-type was more labor efficient than the V-type.
Leafy Lettuce Production Using Baby Vegetable in Hydroponic System with Non-woven Fabric Mat
Park, Kuen-Woo ; Hwang, Dae-Keun ; Kang, Ho-Min ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 175~180
The objective of this study was to evaluate the effectiveness of substrates, cell size of plug tray, and strength of nutrient solution in hydroponic system using non-woven fabric mat to produce fresh baby lettuce (Lactuca sativa). Used rockwool (100%) and used rockwool＋peatmoss (3:1, v/v) were the most proper in lettuce growth and qualities among several kinds of substrates. In substrates mixed with chestnut wood chips showed poor growth than the others. To determine suitable strength of nutrient solution and cell number of plug tray for fresh baby lettuce, Yamazaki’s solution was supplied in hydroponic system using non-woven fabric mat. Generally, the better growth was shown with higher strength of nutrient solution and number of cell in plug tray. Highest yields per plug tray were 72 and 105 cells in plug tray and 2.0-fold strength. The nitrate, P, Ca, Mg contents increased as increasing nutrient solution strength. Vitamin C content was higher in tray with less cell number, but decreased with increasing the strength of nutrient solution. In sum, 72 or 105 cell plug tray filled with 100% used rockwool or used rockwool＋peatmoss (3:1, v/v) mixing subsrates and 2.0 strength of Yamazaki’s nutrient solution were found to be an ideal condition for producing fresh baby lettuce in hydroponic system using non-woven fabric mat.
Selection of Standard Example Varieties for Evaluation of Plant Morphological Characters in DUS Test of Lettuce (Lactuca sativa L.)
Hwang, Seok-Jung ; Jang, Suk-Woo ; Choi, Ju-Ho ; Ho, Qyo-Soon ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 181~189
The morphological characteristics of 86 varieties of lettuce (Lactuca sativa L.) were evaluated in two regions, Suwon (low land area) and Daekwanryong (high land area) in Korea for a DUS (distinctness, uniformity, stability) test. This test is a prerequisite for granting the right of plant variety protection to newly developed varieties. The morphological characteristics like leaf shape, leaf lobe, head formation, leaf color, the distribution of anthocyanin, and undulation and incision type of leaf margin were investigated. There were no significant differences in the qualitative characteristics between Suwon and Daekwanryong. The total of 86 lettuce varieties were classified into three groups by leaf shape, anthocyanin accumulation in leaf, and the shape of head formation. Finally, we could propose each example variety on 95 morphological ones of total 149 characters, including qualitative and quantitative characters required for DUS test.
Chilling Injury Temperature and Changes of Quality during Storage or Marketing in Leaf Lettuce (Lactuca sativa L.)
Bae, Ro-Na ; Jung, Dae-Sung ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 190~193
The leaves of lettuce were stored at -2
C under packaged with corrugated board box or non-packaged condition. Chilling injury occurred in the non-packaged lettuce stored at -1
C after one day, but the lettuce packaged with the box did not show the injury even after 2-3 days. The temperature of lettuce packaged with box was 1-5
C higher than that of the air in storage chamber. A weight loss and decreasing of moisture contents were higher in the non-packaged lettuce than in the packaged, and the degree of loss was more severer at 0
C storage than at -1
C and -2
C. Chilling injury or freezing injury were not observed in the lettuce stored at 0
C in any treatments. In case that the lettuce was stored at the same temperature, electrolyte leakage tended to increase as storage period was extended, showing higher in non-packaged lettuce than that of packaged. The highest value of electrolyte leakage was observed from the non-packaged lettuce stored at -2
C. There was no chilling injury in the lettuce packaged in the box stored at 0
C. It maintained freshness and high quality even after one week of storage.
Effects of Beneficial Antagonists (Bacillus sp., Pseudomonas sp., and Trichoderma sp.) on Control of Clubroot of Chinese Cabbage
Yeoung, Young-Rog ; Kim, Jong-Hun ; Kim, Byung-Sup ; Jeon, Ji-Young ; Yoon, Cheol-Soo ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 194~198
The effectiveness of beneficial antagonists and flusulfamide in suppressing clubroot (Plasmodiophora brassicae) of Chinese cabbage was tested in the field. Seeds of Chinese cabbage cv. Norangkimjang was planted in the 162-cell tray and seedlings grown for 25 days were transplanted in the fields infected with clubroot pathogen. Beneficial antagonists and flusulfamide (0.3% DP) were used to treat the infected soils. After treatment, the disease severity and growth conditions were observed at 10, 30, 40 and 60 days after transplanting. The first incidence of clubroot in the infected soils with non-treated was observed 15 days after transplanting. The severity of clubroot infection rate was 57.5% at 30 days, 85.0% at 40 days and 100% at 60 days when all plants were killed before harvest. In case of antagonist treatment, the rate of clubroot severity was 2.5% at 30 days, 32.5% at 40 days and 77.5% at 60 days. In flusulfamide treatment, 2.5% at 30 days, 20.0% at 40 days, and 97.5% at 60 days were observed. Beneficial antagonists and flusulfamide were effective in reducing the severity of clubroot of chinese cabbage at concentrations of 20 kg/10a application, but it had no effect on increasing the head weight of the plants. No phytotoxicity was observed on any of treatments tested.
Effects of Partial Mulch Using Porous Water Proof Sheet on the Fruit Quality of Very Early-maturing Satsuma Mandarin
Mun, Yeong-Il ; Kim, Yong-Ho ; Kim, Chang-Myeong ; Go, Sang-Uk ; Kim, Han-Yong ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 199~202
The study was carried out to elucidate the effects of partial mulch using porous water proof sheet on the fruit quality of very early-maturing satsuma mandarin (cv. Miyamotowase). The orchard was mulched with porous water proof sheet (PWPS) from the end of the rainy season to the fruit maturing. Non-mulching (control) and polyethylene film (PEF) mulching were also treated to compare with PWPS mulching. With PWPS mulching, soil temperature was decreased and the reflected light intensity was much higher than that of PEF mulching and control. These facts demonstrate the efficacy of mulching of PWPS to enhance peel coloration at the lower part of tree canopy.
Ethylene Removal Program for Quality Maintenance of Cold-stored 'Fuji' Apples
Park, Yun-Mun ; Lee, Seung-Gu ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 203~208
The study was conducted to elucidate ethylene removal effects on quality maintenance of ‘Fuji’ apples during cold storage and to provide optimum parameters for efficient ethylene control. Fruits at commercial maturity were harvested over two experimental seasons: 2001-2002 and 2002-2003. In a commercial-scale experiment, ethylene removal was achieved by using a photo-catalytic ethylene converter. Complementary data of ethylene removal effects were obtained through modified atmosphere packaging treatments with or without an ethylene absorbent. Ethylene removal appeared to improve storability and shelf-life of ‘Fuji’ apples showing better maintenance of fruit firmness and titratable acidity although the effects might vary by harvest season and/or harvest maturity. Estimation of storage volume parameters and ethylene production rates during cold storage suggests that ethylene concentration inside fully-loaded 576
storage (12×8×6 m: L×W×H) may increase by 0.5 ppm/day at the early storage period and 0.7-1.0 ppm/day after four months of storage. Ethylene removal capacity required to offset the increase in ethylene concentration should be 14.1 mL․
for four-month storage and 19.2 mL․
for six-month storage.
Sterilization of Cold Storage Room Using Sodium dichloroisocyanurate
Im, Byeong-Seon ; Yun, Hae-Geun ; Choe, Seon-Tae ; Jeong, Dae-Seong ; Hwang, Yong-Su ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 209~211
Postharvest diseases caused by fungi on harvested products have resulted in a great economic loss. The objective of this research was to develop an efficient control system with a chemical against major postharvest diseases caused by fungi such as Botrytis cinerea, Penicillium expansum and Cladosporium sp. in the cold storage room. Sodium dichloroisocyanurate (250 mg․L^-^1) inhibited spore germination and mycelial growth of all pathogens in the potato dextrose agar (PDA) media at room temperature (25
C). The spray of sodium dichloroisocyanurate was greatly reduced population of fungi in the cold storage room.
Effect of Number of Branches on Quality and Yield of Secondary Cut Flower Production of Dendranthema grandiflorum 'Herman de Boon'
Kim, Ju-Hyoung ; Baek, Kee-Yoeup ; Kim, Hak-Hyun ; Kim, Tae-Joung ; Lee, Jong-Won ; Han, Eun-Joo ; Lee, Cheol-Hee ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 212~215
The effects of number of branches on quality and yield of secondary cut flower of Dendranthema grandiflorum were investigated. Plant height reached 80 cm in plants with 4 branches, but the height rapidly reduced as number of branches increased. Less plants were harvested with increasing number of branches. From plants with one or two branches, less cut flowers were harvested while showing high market quality. In contrast, plants with 5 or 6 branches produced more flowers but with lower quality. Therefore, optimal number of branches for growth and flower quality was found to be 3 to 4.
Covering of Non-woven Fabric Mat and Alteration of Layering Position of Rice Hull and Peatmoss on the Change of Physical Properties of Substrate and the Growth and Development of Chrysanthemum cv. 'Chungwoon'
Hwang, In-Taek ; Cho, Kyung-Cheol ; Kim, Sun-Kook ; Chung, Soon-Ju ; Kim, Kwang-Soo ; Choi, Kyung-Ju ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 216~220
The effects of covering non-woven fabric mat on rice hull media and modifying the stratifying structure of rice hull and peatmoss to complement disadvantage of having low water holding capacity on the growth and development of hydroponically grown chrysanthemum were studied. To improve the physical condition of rice hull media, treatments were divided into four groups as follows: (i) single use of rice hull, (ii) non-woven fabric mat covered on rice hull; (iii) rice hull mixed with peatmoss (50:50, v/v); and (vi) rice hull stratified beneath peatmoss (50:50, v/v). The depth of substrate was 15 cm. Modifying the stratifying structure of rice hull and peatmoss shoot fresh, root fresh increased plant height, stem diameter, the number of leaves, and dry weight. Mixing rice hull with peatmoss increased leaf area, flower diameter, and dry weight. In the case of non-woven fabric mat, plant growth was better than that of the control, and nutrient solution applied was evenly spreaded out into rice hull media. However, tendency of appearing mineral and chlorophyll content in the leaves was irregular among treatments.
Effects of Newly Developed Organic Substrate from Sewage Sludge on the Growth of Pot Flowers, Celosia cristata and Tagetes patula
Huh, Moo-Ryong ; Lee, Jeong-Yeol ; Park, Joong-Choon ; Moon, Moo-Cheol ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 221~225
The objectives of this research were to evaluate the potential use of sewage sludge as medium amendments and to determine the effect on growth of Celosia cristata ‘Orient 2’ and Tagetes patula ‘Yellow Boy’. To achieve these, the sludge was divided into four types: MPO (none added to sludge), MPM (10% of 16 kinds micro-organism added to sludge, W/W), MPA (10% of animal amino acid added to sludge, W/W), and MPMA (5% micro-organism and 5% animal amino acid added to sludge, W/W). The organic materials were blended with Tosilee (commercial media) in a ratio of 5, 10, 20, and 40% (W/W). The plant height of ‘Orient 2’ was lower than the control, but no statistical differences were observed in marigold. A ten percent mixing ratio resulted in highest plant height. However at 40% ratio, both plants showed reverse effect. Root lengths showed no significant differences among all treatments of ‘Orient 2’. The treatment of 5% blending had longest root length in ‘Yellow Boy’. ‘Orient 2’ showed thicker stem diameter with the treatment of MPA and MPM. However, MPO affected slight increase in stem diameter of ‘Yellow Boy’. Treatments of 20% mixing ratio showed thickest stem diameter of both plants. While the treatments of 5 and 40% ratio showed thinnest stem diameter in both ‘Orient 2’ and ‘Yellow Boy’. The number of flowers of both plants were lowest in the treatment of 40% ratio in all types of sludge. The fresh and dry weights of ‘Orient 2’ were lowest with 5 and 40% ratio, and these of ‘Yellow Boy’ were with 40% ratio. The 20% ratio resulted in the heaviest fresh and dry weights in both cultivars. Water contents increased as mixing ratio increased.
Effect of Reducing Spray Water Volume on Weed Control by Dithiopyr in Zoysiagrass (Zoysia japonica)
Choi, Joon-Soo ; Woo, Kyung-Jin ; Yang, Geun-Mo ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 226~229
Dithiopyr[3,5-pyridinedicarbothioic acid, and 2-(difluoromethyl) 4-(2-methyl propyl)-6-trifluoro methyl)-S, S-dimethyl ester] are widely used for the control of annual grass weeds in turfgrass management. This study was focused on the effect of weed control in zoysiagrass (Z. japonica) by reducing volume of spray water for dithiopyr application. Field experiment was conducted on the mature turf of zoysiagrass. Treatments evaluated were 0.48 kg・
(32%) of dithiopyr applications at 10 mL・
, 20 mL・
, 30 mL・
, 100 mL・
and 200 mL・
of water spray. In all the spray water volume treatments, weeds were controlled over 95.3% at 15 weeks after application, and no injury was developed. Thus, it is suggested that the application of dithiopyr in 1020 mL・
of spray water was efficient volume for controlling annual weeds in zoysiagrass.
Development of Chipping Machine for Highly Efficient Propagation of Lycoris spp.
Park, Yun-Jum ; Yoo, Sung-Oh ; Yun, Jae-Gil ; Jang, Hong-Gi ; Heo, Buk-Gu ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 230~232
A machine was developed to improve chipping efficiency on propagation of Lycoris spp. The chipping machine was composed of a cutting board with radial cutting knives on which bulbs can be placed, and a handle to push the bulb down. The bulbs can be divided into a few pieces by pushing the handle. Chipping efficiency between by hand and the machine was compared using the bulbs of Lycoris radiata and L. squamigera. Chipping machine was 25-time more effective than chipping by hand. Lycoris radiata bulbs chipped by the machine and hand were cultivated in incubator for 5 months, and then a rotting rate, bulblet production, bulb plants number and bulblet weight were compared. No significant difference was shown between chipping by hand and machine in all items investigated. These results indicate that the newly developed chipping machine could be a useful device for propagating other bulbous plants.
Optimum Kinds and Concentrations of Dye for Preserving Magnolia kobus and Magnolia grandiflora Leaves
Sohn, kwan-Hwa ; Kwon, Hye-Jin ; Kim, Eui-Young ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 233~238
Leaves of M. kobus and M. grandiflora, collected on July 25, 2000, were preserved in 40% glycerine solution added with 1 mL․
Tween 20 and 0, 1, 5, 10, 25, or 50 g․
food color (green), malachite green (basic dye), and design master absorbit (stem dye for cut flowers, holiday green). The best leaf color of dried plants of both species was made with 10 g․
food color (L*a*b* value: M. kobus 25.57, -5.75, 4.02, M. grandiflora 28.15, -11.84, 7.11). These were absorbed uniformly, similar to natural green color(L*a*b* value: M. kobus 35.23, -11.70, 15.66, M. grandiflora 35.22, -13.06, 16.70), and thus, it could be used economically in Korea. To make a similar color to that of natural green leaf, the leaves of both plants collected on Aug. 10, were preserved in 40% glycerine solution added with 1 mL․
Tween 20 and 1, 2.5, 5, 7.5, or 10 g․
food color of green, green＋yellow (6：4), green＋red (8：2), and green＋yellow＋red (6：3：1). Leaves of M. kobus and M. grandiflora preserved with 10 g․
green and green＋yellow (6：4) food color dyes gave the best result, but the preferences to the dried leaves with various green colors were needed to be investigated.
Restoration of Fertility in Male-sterile Transgenic Tobacco Plant
Jin, Yong-Moon ; Lee, Yeon-Hee ; Kim, Jung-Sun ; Cho, Hyun-Suk ; Park, Young-Doo ; Park, Beom-Seok ; Kim, Ho-Il ;
Korean Journal of Horticultural Science and Technology, volume 21, issue 3, 2003, Pages 239~244
To establish the fertility-restoring system, the genes of barnase (RNase), barstar (RNase inhibitor), and tissue-specific promoter of tobacco TA29 (Pta29) were used for this study. Tobacco plants were transformed with barnase gene fused to Pta29 via A. tumefaciens strain LBA4404 and selected with kanamycin media. A total of 126 T0 transgenic lines were screened by PCR, but the level of male sterility among them was very variable. Only four lines were complete male-sterile, five lines were strong male-sterile, and eleven lines were half male-sterile. From these transgenic plants, seven lines including the four complete male-sterile lines were selected for fertility restoration study. Tobacco plants were also transformed with barstar gene fused to Pta29, selected with hygromycin media, and screened by PCR. The resulting transgenic plants containing barstar gene were self-pollinated for two generations to obtain the homozygous T2 progeny lines and used as restoration lines. After crossing the male-sterile and restoration lines, F1 seeds showing resistance to hygromycin and kanamycin were selected. All the selected F1 plants were grown to fertile plants. In conclusion, tapetum-specific promoter isolated from tobacco, male-sterile gene, and fertility-restoring gene could be applied to fertility-restoring system for production of F1 hybrid seeds.