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Korean Ginseng (Panax ginseng C. A. Meyer), herbaceous perennial of family member of Araliaceae, has been a main subject to elucidate its medicinal efficacy for a long time. As a result, the basis of scientific theory on the medicinal efficacy has been addressed. In the summary of the introduced book "Ginseng", the applicaiton of well-rotted horse manure can be a potential adventage for its growth. The edibility of berry also widen its potential as a good matenial for food proessing. It is highly feasible to produce beverage or pickled berry with ginseng fruits. In America, as early as 1890, optimal growth condition was determined with well-defined experiment and observatin. They reported that four to six years is long enough to keep transplanted roots in the ground. IN comparison the cultivatin of this valuable roots had been established before the time in Korea peninsula, especially in the neighborhood of Kaisong. According to old chinese trading report (1896), the price of Korean ginseng was $16.50 per pound which was nearly nine times high than the price of ginseng from America, priced at $1.86 per pound. The detemination of ginseng price did not followed the general law of supply and demand. It depends upon the color, the form and size, and its fancied resemblance to the human body. In Korea the cultivated ginseng is smaller than wild type or sansam(mountain sinseng) in length and diameter. The medicinal efficacy of samsam is belived to involve many physical rejuvenation such as improvement of physical strength and recovery from sleeplessness and many diseases. All these cure seems to come from improved immune system. That is why many people call ginseng as a miraculous elixir.
This experiment was conducted to investigate the effect of potassium and nitrogen concentration in culture solution on root and shoot growth of tobacco plants. 1.Potassium nutrition was effective to promote the elongation and branching of secondary root in early stage of tobacco growth. 2.Elongation of root was inhibited in non K2O plot, but accelerated in non nitrogen plot. 3.Root-rot symptom was showed In non K2O plot. 4.Dry weight of root was showed a tendency to increase in K2O 80 and 160ppm treatment. 5.In shoot, effect of potassium nutrition on accumulation of inorganic matter was promoted by additional supply of nitrogen.
1.Number of leaves, plant height, leaf area, weight of shoot and rout were increased and Root/Shoot Ratio was decreased by increased amount of watering before and during hardening. 2.Plant height root length, leaf area and weight of shoot and root were large in the media contained 75% and 50% of carbonized chaff, and small in the media contained 100% and 25% of carbonized chaff. 3.In moderate hardening treatment, there were little difference of shoot and root weight and Root/Shoot Ratio among the media. In severe hardening treatment, the shoot and root weight was small in the media contained 100% carbonized chaff and large in the media contained 50% and 75% carbonized chaff. 4.Media contained 100% carbonized chaff showed high ratio of root weight/root length and showed little difference of leaf area between the fourth and fifth leaf.
This experiment was conducted to investigate the effect of Ca and Cl concentration in water culture solution on the growth and yield of free-cured tobacco. Results of Ca treatment ; 1.Dry weight of harvested leaves was largest in Ca 150 ppm plot. 2.Leaf growth was inhibited, and the length/width ratio of leaf was large in Ca 0 ppm plot. 3.Root growth was much inhibited and so T/R ratio was increased in Ca O ppm plot. Result of Cl treatment ; 4.Stem height and leaf area were largest in Cl 100 ppm plot, and leaf shape was not influenced in accordance with Cl concentration in culture solution. 5.Dry weight of harvested leaves was increased with the increases of Cl concentration (12.5, 25, 50, 100ppm) in culture solution but the weight in the plot of 200ppm of Cl was smaller than those in 50 and 100ppm of Cl. 6.Differences of dry weight of stem and root skewed the same tendency as that of dry weight of leaf. 7.T/R ratio was highest in Cl 200 ppm plot.
This experiment was carried out to investigate the effects of different sowing time, seedling age and ridging before and after setting un the growth and yield components of flue-cured tobacco. The variety applied was N.C. 2326. The results are as follows. 1.The growth of seedlings was large in late sowing and in large seedlings. 2.The growth during early growing stage after setting was good in large seedlings, and promoted by ridging before setting. 3.There were little differences of growth during maximum growth and at topping time among the treatments. But the amount of growth was large in the plots of ridging before setting. 4.Mean leaf area showed little difference among the treatments, but leaf area of upper leaves increased in the plot of young seedling are with ridging before setting. 5.The weight of unit leaf area of lower leaves was large in early sowing and young seedling age, but in upper leaves, there were little difference among the treatments. 6.Yield and number of harvested leaves showed no significant differences among the treatments.
This experiment was conducted to study the effects of gibberellin and ethrel treatment on the root growth of Hicks tobacco seedlings. The number of secondary root emerged in 15 days after gibberellin treatment decreased in the gibberellin 50, 100 and 200ppm plots, and the higher gibberellin content was, the greater the decrease was. Elongation of secondary root was effected by gibberellin treatment as same tendency as the number of secondary roots. The number of secodary root decreased also in 500 dilution of ethrel plot, but increased slightly in 2000-4000 dilution of ethrel plots. Elongation of secondary root was inhibited markedly in each ethrel treatment plot, and the higher ethrel content was, the more elongation of the root inhibited extremely.