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

다국어 초록 (Multilingual Abstract)

Dressing increased amount of nitrogen for higher yield has influences on the yield and quality of leaf tobacco, especially on the accumulation of nitrate in the leaf to deteriorate smoking taste and odor. This study was carried out to investigate the effects of different amount of nitrogen, dressing method and nitrogen types(NH4 -N, NO3- N, and Urea- N) on the dry matter production and NO3- N accumulation of every leaf position.
The results are summarized as follows.
1.Total leaf weight per a plant and dry weight per unit leaf area of all leaf positions were high in the treatment dressed urea-N 50% increased amount and those were higher in NO3-N than in NH4-N treatment.
2.The area and weight of the largest leaf were large in the treatment of NO3-N 50% increased amount. 100% increased amount of nitrogen made the area and weight of the largest leaf small, compared with the treatment of the recommended amount of nitrogen.
3.70% basal dressing and 30% side dressing of Urea-N and NO3-N made the total leaf weight per a plant, dry weight per unit leaf area and weight per a leaf largest. But in the treatment of 100% increased amount 50% basal dressing and 50% side dressing was efficient.
4.The larger the amount of nitrogen dressed, the higher the content of NO3-N in the leaves of all positions was. The highest content was shown in the lower leaf position treated increased amount of NO3-N.
5.In the leaves of all leaf positions, the content of nicotine, total nitrogen and protein nitrogen were high and the content of carbohydrate was low in the treatment dressed increased amount of nitrogen. There were little differences of the content of those chemical compounds according to the type of nitrogen and method of dressing.
6.The accumulation of NO3-N in the leaves was increased by the treatment of dressing NO3-N 15kg/10a or more and side dressing 50 days after transplanting and later, and those treatment made the lower leaves malodorous, like odor produced while burning protein.

목차 (Table of Contents)

• 緖言
• 實驗材料 및 方法
• 實驗結果 및 考察
• 1.葉位別 葉形質과 物質生産
• 2.葉位別 內容成分과 物質生産
• 摘要