Photosynthesis according to chlorophyll contents of ginseng

Ginseng is cultivated mostly in Korea and China. As a medicinal plant, it has traditionally been used for treating such diseases as hypertension, diabetes mellitus, liver and kidney dysfunction, mental disorders, and skin inflammation since long ago. Ginseng can be harvested three years after its cultivation. As a half-shade plant, ginseng is cultivated in a sun-screening facility. If the sun-shading material of ginseng has a high light transmission rate, chlorophyll contents reduce and ginseng withers away; if a low light transmission rate, chlorophyll contents increase but a growth amount decreases. Therefore, this study analyzed photosynthesis of 6-year ginseng according to chlorophyll contents. At 20℃, when the value of chlorophyll contents was 35, the photosynthesis was the highest, or 3.98 µmol / m²s. At 25℃, when the value of chlorophyll contents was 30, the photosynthesis was high, or 4.38 µmol / m²s. At 30℃, when the value of chlorophyll contents was 25, the photosynthesis was the highest, or 2.89 µmol / m²s. In terms of quantity, a typical sun-shading method had 762 kg / 10area; when the shading method was adjusted in order to make chlorophyll contents suitable to photosynthesis, it had 1,174 kg / 10area. In terms of the useful element ‘ total ginsenoside ’, a typical sun-shading method had 5.7 mg / g; when the shading method was adjusted in order to make chlorophyll contents suitable to photosynthesis, it had 27.51 mg / g. In conclusion, to increase a quantity of ginseng and total ginsenoside, it is necessary to adjust a sun-shading facility on the basis of chlorophyll contents.