黃色種 담배의 葉位별 物質生産에 關한 硏究 (II) = A Study on the Dry Matter Production of Tobacco Leaves at Different Stalk Positions (II)

다국어 초록 (Multilingual Abstract)

This experiment was conducted to interpret the dry matter production of individual leaf of tobacco NC2326 according to the seeding times, the quantity of nitrogen and/ or potassium levels and various application rates of these fertilizers. The results are as fellows ;
1.In stem height, total number of leaves and leaf area those sowed on Feb. 20th were better than those sowed on Mar. 13th in early growing stage(investigating date May 11, 25 and June 8), but in later stage those sowed on Mar, 13 were better.
2.The effect of nitrogen application showed significance in the leaf area when investigated on July 22 and June 6. The effect was the lowest when treated by 4.4kg/10a of nitrogen application, the effect was greatest treated by 17.4kg/10a, no significance was shown treated by 10.8, 17.4 and 23.1kg/10a.
3.The effects of potassium application and application rates scarcely showed any significance in these traits.
4.The growth was the best under the 20 : 40 and 40 : 60% of basal/ top dressing rates. These means the early growth is not disturbed by heady application of nitrogen.
5.According to the investigation date correlation coefficients estimated between agronomic traits showed positive significance in leaf width and leaf length, leaf area and leaf length, leaf length and leaf area.
6.According to sowing date leaf area for each stalk position was larger in tobacco plants sowed on March 13.
7.Fresh leaf weight and leaf area for each stalk position were higher in the order of middle>lower>upper leaves, and fresh leaf weight and leaf area by the representative stalk position were higher in the order of 16th>10th>21th leaf.
8.Fresh leaf weight and leaf area according to the nitrogen levels were lower by 4.4 and 10.8kg/10a application, higher or the same by 17.4 or 23.1kg/ 10a application.
9.Dry leaf weight was higher in the order of middle>upper>lower leaves, and in the order of 16th>22th>10th leaf according to the representative stalk position.
10.Rate of dry leaf weight / fresh leaf weight, dry leaf weight per area and rate of dry leaf weight / fresh leaf weight per area were higher as the order of upper>middle>lower leaves, tended to become higher as the nitrogen levels was lower. The effect of potassium application was not remakable for the former two traits, but the rate of dry leaf weight / fresh leaf weight per area had the tendency to be higher as the application amount of potassium was lower.
11.According to the stalk position, correlation coefficients estimated between agronomic traits showed positive significance in the leaf area and fresh leaf weight, leaf area and dry leaf weight, fresh leaf weight and dry leaf weight, dry leaf weight per area(D.F PA), the rate of dry leaf weight / fresh leaf weight and D/F PA.
12.The possibility of presumption between dry matter production by the stalk position and dry matter production by representative stalk position was high showing a high significant correlation (<0.7) between lower leaves and 10th, middle leaves and 16th in the dry leaf weight while correlation between upper leaves and 22th leaf was quite low.
13.Total sugar content with potassium application effective in lower leaves was low by 70kg/10a, high by 10 or 40kg/10a potassium applications, with nitrogen application also effective in middle leaves was high by 17.4kg/10a, low by 6.5 or 28.3kg/10a nitrogen applications.
14.Nicotine content was low by 17.4kg/10a, high by 6.5 or 28.3kg/10a nitrogen applications, high by 70kg/10a, low by 40 or 10kg/10a potassium applications. Nicotine content by stalk position was high in the order of upper>middle>lower leaves.
15.Total nitrogen content showed no significance in the nitrogen and potassium application, but high by 6.5 or 28.3kg/10a of nitrogen, low by 10 or 40kg/10a of potassium applications. Total nitrogen content by stalk position was high in the order of upper>middle>lower leaves.
16.Crude ash content showed no significance in the nitrogen and potassium applications, had the similar tendency with the case of total nitrogen or nicotine contents.
17.Correlation coefficients estimated between traits related to tobacco quality had same tendency in the upper, middle and lower leaves, Correlations between total sugar and nicotine contents, total nitrogen and crude ash showed negative high significance, between nicotine and total nitrogen, curde ash and between total nitrogen and showed positive high significance.
18.In correlation coefficients between dry leaf weight or dry leaf weight per area traits related to tobacco quality and all showed positive high significance with total sugars, and showed negative high significance with nicotine content, total nitrogen and crude ash contents in all stalk positions.

목차 (Table of Contents)

• Ⅰ.緖言
• Ⅱ.硏究史
• Ⅲ.材料 및 方法
• Ⅳ.結果 및 考察
• 1.生長解析
• 2.葉位別 物質生産
• 3.葉位別 平均物質生産과 代表 葉位別 物質生産의 推定可能性 檢討
• 4.品質特性
• Ⅴ.綜合考察
• Ⅵ.摘要