Gyu-Bin Lee

Establishment of Seed Treatment for Healthy Production of Peanut Sprout

【The present study was conducted to develop seed treatment for the production of healthy and clean peanut sprout. Dry heat treatment of peanut seeds reduced the incidence of the rot. The seed treatment condition at

Influence of Fruit Set Internode on Seed Germination and Seedling Vigor in Watermelon

52^{\circ}C

Establishment of Days after Anthesis(DAA) and Fruit After-ripening Period(FAP) for High-Quality Seed Production of Watermelon

for 10 h. was the most efficient without inhibiting seed viability significantly. Seeds were dark cultured at

Effect of the Organic Fertilizer Mixed with Various Recycled Coir Substrates on Chinese Cabbage(Brassica Campestris Ssp. Pekinensis) and Lettuce(Lactuca Sativa)

27^{\circ}C

Establish of Optimum Cultivation Temperature for the Production of Peanut Sprouts

for up to 9 days. The treatment of Indole-B and gibberellic acid influenced germination, T50, fresh, dry weight, hypocotyl length, hypocotyl length diameter, root length, number of lateral root and epicotyl of peanut sprout. There were no differences in the germinability of peanut seeds between gibberellic acid treatment methods but higher fresh weight was observed in the GA3 solution spray after 2 hour water soaking. The general growth and lateral root development of peanut sprouts were suppressed by Indole-B which is used for inhibiting root formation and promoting hypocotyls. The treatment of gibberellic acid promoted hypocotyl elongation, but it did not influence on the growth of hypocotyls and root system.】

Effect of Spermine Treatment on Growth, Yield, and Quality of Strawberry under Low-Temperature Condition

This study was conducted to investigate the effects of fruit set internode on the germination of watermelon seeds. Generally fruits setted in higher than 20 internode were high percent of germination, fruit setted in low internode(5-10) is low. The higher fruit-set internode, fruit weight was significantly increased, but 1,000 seed weight was decreased the more fruit set internode. However number of seed was about 300 seeds irrespective of fruit-set internode. Investigating viability of seed by BP test, general percent germination was recorded highest at 5 flower cluster above 20 internode of fruit-set internode. In contrast, condition of fruit setted on 3, 4, 6 flower cluster were high percent of germination, regarded as unnormal germination not to be as normal seedling by 2~3%. Seed harvested at 5 flower-cluster had high viability on hypocotyl height and diameter of seedling through early growth test, but were not significant. Therefore 5 flower-cluster was optimum fruit-set internode to obtain high-quality seed.

Effects of Groundwater Cooling Treatment on Growth, Yield, and Quality of Strawberries under High Temperature Conditions

This study was conducted to investigate days after anthesis (DAA) and fruit after-ripening period (FAP) for seed-harvesting of high quality watermelon seeds. Fruit weight and number of seed per fruit increased according to DAA, while those did not significant about FAP. Ratio of cotyledon at whole seed was higher about 2 to 4% compared to seed coat irrespective of DAA and FAP. Germinability of watermelon was not a significant effect by DAA, however, it had differences by FAP. Percent of germination (PB) was below 50%, when 30 days maturated fruits after anthesis was omitted ripening, while PB was increased to 92% by ripening. In addition, seeds at DAA 40 and FAP 20 were higher general seedling vigors (hypocotyl length, diameter etc.) in BP test. Results indicated that considering seed productivity, it had maximized seed viability at DAA 40 and FAP 20.

A Study on the Possibility of Recycling Coir Organic Substrates for using Strawberry Hydroponics Media

The present study was conducted to find a way to recycle the coir substrate by investigating changes in its physical and chemical properties based on the number of use year. Specific gravity of unused coir substrate was , while it was higher for the substrate used for 2 years. Porosity was different depending on the number of use year. The porosity of unused substrate was 51.9%, but it increased to 68.6% after used for 2 years. In general, physical and chemical properties were better in the coir substrate used for 2 years than in unused one. The number of leaves, leaf area, flesh weight and dry weight of oriental cabbage and lettuce were higher in coir substrate used for 2 years than those in unused one. Whereas, no significant difference was observed between the substrates used for one year and 2 years, indicating that the one time-used wast substrate could be recycled for cultivating vegetables. Growth of the vegetables was improved when organic fertilizer composed of complex organics with different mixing ratios was provided to the coir substrate, compared to untreated plot. The optimum mixing ratio of the wast substrate and complex organics was 2:8(v/v) for fertilization using wast coir substrate. Therefore, coir substrate generally wasted after being used for one time was reuseable by supplying organic fertilizer.