Background : The effective components of Omija(Schisandra chinensis Bailllon) are lignans (schizandrins and gomisins), and this components were contented mostly in seed part on Omija, which have various physiological functionalities such as anti-cancer, anti-inflammatory, and antioxidant activities. Methods and Results : This study was carried out to determine effective condition(CO2, CO2+ethanol) on extraction using supercritical carbon dioxide extraction (SFE) system and to find interrelation on effective components and antioxidant activity of extracts and residues obtained after extraction. Effective components were analysed lignans and phenolic compounds and antioxidant activirty was determined for DPPH radical scavenging ability on methanol extracts of SFE-extract and SFE-residue. On SFE with ethanol, SFE extract was separated two phase, upper(water phase) and lower(oil phase). SFE-extract showed the highest total lignans content(61.36 mg/g, 72.14 mg/g on lower, 50.58 mg/g on upper) and the lowest total phenolic compounds(6.52 mg/100g) and SFE-residue showed the lowest total lignans content(1.45 mg/g) and the highest total phenolic compounds(16.23 mg/100g) by extracted on CO2+ethanol treatment. SFE-residue methanol extract showed the highest DPPH radical scavenging abilities and SFE-extract upper showed the lowest. Conclusion : Thus, this results showed SFE-extract showed the highest total lignans content, but SFE-residue showed the highest DPPH radical scavenging ability although the lowest total lignans content.

Background : Fruit picking is the most labor consuming procedure for Boxthorn (Lycium chinense Mill.) growers. Recently fruit harvesters were invented and improved in the efficiency to fulfill the expectation of farmers through field demonstration tests. Additionally, T-type hedge cultivation method harmonized well with fruit picking machine, but it also needed to be improved in its’ pruning methods for the efficiency of fruit collecting procedure. Methods and Results : In this experiment, ‘Cheong-un’ cultivar and local variety were grown in the rain shelter greenhouses for the tests. Plots were set by randomized block design. There were two types of previously developed harvesters. One vibrates it’s harvest rod right and left (A type) and the other shakes it’s rod back and forth (B type). Among two harvesters A type was superior to B type in efficiency and convenience in use and it was able to harvest eleven times more fruits than manual picking in simple comparison test. In field comparison test, A type harvester performed 4.6 to 5 times more fruits than manual fruit picking. T-type hedge cultivation method is the proper way of enhancing efficiency of harvester. In the test, wiry perpendicular branches formed by once pruning method hindered moving forward of fruit collector. However installing collecting net with velcro along the edge under the field increased the efficiency and handiness of fruit harvester and well harmonized with T-type hedge cultivation. Conclusion : From the above results, the newly developed fruit harvester could increase the annual income of Boxthorn growers by reducing fruit picking labor and time.

Background : Boxthorn has been cultivated by conventional fertilization and irrigation methods that can be characterized by applying a great deal of fertilizers and a small amount of water compared to the other crops. With increasing rain shelter greenhouses, there were significant needs for developing new fertigation and irrigation methods. In this study, several prescribed fertigation methods for balanced fertilizer application and a few irrigation start methods based on soil moisture tension has been tested to confirm the fruit quality and productivity for Boxthorn growers. Methods and Results : In the experiment, ‘Cheong-un’ cultivar was grown in the rain shelter greenhouses for the tests. Plots were set by randomized block design. According to the growth investigation on the ‘Cheong-un’ cultivar which is supplied with four different formulated fertigation, the formulation N 15 me/ℓ increased the size and weight of fruit leading to 17% increased yield than the others. Additionally, on the amount of annual supply of fertigation with the concentration of N 15 me/ℓ, the treatment applied with 10kg/10a during the cultivation period facilitated overall growth of ‘Cheong-un’ cultivar and increased the yield as well. In the irrigation experiment ‘Cheong-un’ cultivar was grown in the four differently planned treatments that start irrigation at –20, -40, -50 and -100kPa soil moisture tensions. According to the investigation, the irrigation treatment starting at -50kPa enhanced the number of fruit bearing and productivity of Boxthorn consistently during two years. Conclusion : Therefore, the newly developed fertigation and irrigation methods could enhance the annual income of Boxthorn growers by increasing growth and yield.