煙草植物의 生理, 生態에 關한 硏究 : 第一報 培養液中의 K₂O濃度가 煙草植物의 生長 및 發育生理에 미치는 影響 I. Physiological Effects of K₂O Concentration in Culture Solution on Growth and Differentiation of Tobacco Plants = Physiological and Ecological Studies on Tobacco Plants

다국어 초록 (Multilingual Abstract)

The experiment was conducted in order to investigate the influence of K2O levels on growth and differentiation of tobacco plants. Experiment plots were comported of 6 K2O levels (0, 8, 40, 80, 160 and 320ppm) which consisted of 3 different periods of treatment (whole growing period (I), secondary bed period (II), and field period (III). For this study, Bright Yellow tobacco (Nicotiana Tobacum L) was cultured by a renewal water culture system in a green house.
1.Stem elongation was accelerated in accordance with increasing K2O levels, especially in the early stage, and the effect was most significant in block I.
2.The increase of visible leaves showed the same tendency to stem elongation, but the total number of differentiated leaves were not different between each plots.
3.Days to flowering were significantly reduced according to the increase of K2O levels in block I and II, expecially block I. However there was no difference in block III.
4.The dry weight of harvested leaves was significantly increased from 0 ppm to 80 ppm in block I, while it was increase to 320ppm in block II and III.
5.The higher the K2O concentration, the lower the T/R ratio was. This was especially remarkable in block I. Roots continued to grow more than stems and leaves in higher K2O levels (160 and 320 ppm).
6.When K2O was administered in culture solution of from 0 ppm to 80 ppm the alkaloid content increased. However, there was no alkaloid increase when K2O solution of from 80 ppm to 320 ppm wer administered.
7.Conversely, the total nitrogen content followed the opposite tendency to decrease with the rise of the alkaloid content.
8.Soluble carbohydrate content was not regularly changed in accordance with the increase of K2O levels.

목차 (Table of Contents)

• 緖言
• Ⅰ.實驗材料 및 方法
• 1.實驗區構成
• 2.培養液組成 및 栽培方法
• 3.試料의 操作
• Ⅱ.實驗結果 및 考察
• 1.生育狀況
• 2.K2O 水準과 發育反應
• 3.植物體의 生長量 및 收量
• 4.K2O 水準과 內容成分
• Ⅲ.摘要