煙草植物의 加里營養에 관한 硏究 = Studies on the K₂O Nutrition of Tobacco Plants(Nicotiana Tabacum L)

다국어 초록 (Multilingual Abstract)

This experiment was conducted to investigate the effect of K2O on the water cultured tobacco plants in a green house. In the case of different condition of nitrogen, iron and environment, the effects of different levels and periods of treating time of K2O on the growth, development, dry matter production, yield and quality (chemical components ) were studied.
1.The higher the level of K2O was, the larger the dry matter production and growth were. The differences of these were significantly large in the high level of nitrogen, but not significant in the low level of nitrogen.
2.The flowering and maturing were remakably accelerated by the increased K2O supply under the condition of low temperature and short day, but they were not accelerated under high temperature and long day. At the low (deficient) level of nitrogen, the increased K2O supply delayed flowering.
3.The number of differentiated leaves showed little difference among the plots of different K2O levels, but it decreased at the low level of K2O and nitrogen.
4.The yield increased rapidly as the amount of K2O increased until 80ppm under the condition of low temperature and short day, however there was little difference among 80, 160 and 320ppm of K2O. On the other hand the yield increased until 200ppm of K2O supply under the condition of high temperature and long day. The effect of increased K2O supply on the yield was enhanced by the increased nitrogen supply.
5.The dry weight of the root was increased with the increased K2O supply and this effect was enhanced by the high nitrogen level. T/R ratio was decreased significantly by the increased K2O supply.
6.The more the K2O supply was, the higher the content of soluble sugar and K2O in the leaves were, and the lower the total nitrogen was. The content of nicotine in the leaves was low in the low level of K2O (0,8 and 10ppm), but that showed little difference among the plots of standard (80ppm) and high (150, 200ppm) levels of K2O. Ash content showed little difference among the plots of different levels of K2O.
7.There was positive correlation between the content of soluble sugar and K2O in the leaves, and negative correlation between the content of nicotine and K2O in the leaves.
8.It was concluded that the effect of K2O supply on tobacco Plants were changeable in accordance with the environmental condition of cultivation.

목차 (Table of Contents)

• 緖論
• Ⅰ.硏究史
• Ⅱ.實驗1. 加里供給量과 供給期間이 煙草植物의 生育, 物質生産, 葉中化學成分에 미치는 影響
• 1.材料 및 方法
• 2.試驗結果 및 考察
• Ⅲ.試驗2. 培養液中의 窒素供給量이 加里宮養의 生理的 役割에 미치는 影響
• 1.材料 및 方法
• 2.試驗結果 및 考察
• Ⅳ.試驗3. 煙草植物의 生長과 發育生理에 미치는 K2O, N, Fe 宮養의 相互關係
• 1.材料 및 方法
• 2.試驗訣果 및 考察
• Ⅴ.綜合考察
• Ⅵ.摘要