• Applied Biological Chemistry
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• 제37권5호
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• pp.349-355
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• 1994

비파괴 측정법의 하나인 근적외 분광분석법을 응용하여 국내산 황색종 잎담배의 품질에 관련된 주요성분인 수분, 니코틴, 전질소, 환원당 및 색깔 등을 신속, 정확하게 동시에 측정하기 위한 가능성을 조사하였다. 근적외 영역의 광학데이타와 기존 습식분석법에 의한 잎담배의 수분, 니코틴, 전질소, 환원당 및 L, a, b 측정치 간에 중회귀 분석을 행한 결과, 검정용 시료에 대한 측정오차(SEP)가 각각 0.28%, 0.25%, 0.07%, 1.25, 0.44 및 1.07이며, 시료의 전처리없이 30초 이내에 동시에 측정 가능함을 알 수 있었다. 아울러 잎담배 수매, 원료가공 및 제품담배 제조현장에 활용하기 위한 보급형 근적외 분광분석기의 개발 가능성도 검토하였다.

• 한국연초학회지
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• 제25권2호
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• pp.95-102
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• 2003

To get the informations of quality uniformity of threshed burley tobacco produced from 1997 to 2001 and processed at various leaf processing factories, chemical constituents contents and coefficient of variation(C.V.) were analysed. The average chemical constituents contents of 12 grades during 5 years ranged as follows; nicotine 1.76～2.66%, total nitrogen 4.15～4.80%, crude ash 21.6～22.4% and chlorine 1.08～1.20%. The variations of chemical constituents contents among crop years was higher in nicotine while lower in crude ash. The nicotine content of upper leaves were influenced negatively by rainfalls, while total nitrogen content were influenced positively by air temperature and sunshine hours during July. The C.V. of chemical content in same grade was higher in chlorine and nicotine while lower in crude ash. The ratio of C.V. among leaf tobacco processing factories/C.V. of total sample in same grade was high in nicotine. To reduce the C.V. of chemical constituents, it is recommendable to thresh the leaf tobacco at one processing factory. When the leaves being processed at one factory, the decreasing effect of deviation was higher in nicotine, particularly.

• 한국연초학회지
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• 제5권2호
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• pp.3-7
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• 1983

Three levels of nitrogen, phosphate and potassium were applied to tobacco for the establishment of the optimum rate of the fertilizers for yield and quality. 1 . The rate increment of nitrogen and potassium increased tobacco growth, but phosphate were non - significant between rate. 2. The contents of total-nitrogen and total-alkaloid in the leaf were increased, with the increase of nitrogen rate while the effect of phosphate and potassium were negligible. 3. The yield and quality of the tobacco were increased with the increasing rate of nitrogen and potassium fertilizer but phosphate should little difference.

• 한국연초학회지
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• 제6권1호
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• pp.63-72
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• 1984

1 . Some components associated with mildness, taste, and aroma were set. It was supposed that the three factors contribute to equally the evaluation of tobacco quality. Following equation of quality index was provide. $Q_{pr}\;=\;=0.815\;f_1+8.224f_2+1.858f_3$ where $f_1$ = Reducing sugar (%)/cellulose (%) $f_2=\frac{1}{Total N (%) + Protein (%) + Citric acid (%)}$ $f_3$=Key aromatic compounds ($mg/10g$) 2. The coefficient of correlation between the grades by visible criteria and the values of the quality index for Korean flue-cured tobacco was $\tau$=-0.689 (n=29)

• 한국작물학회지
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• 제33권3호
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• pp.242-247
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• 1988

향미 원료용 연초의 생육중 토양수분에 따른 잎담배의 화학성분과 품질과의 관계를 분석한 결과, 1. 토양수분이 많을수록 초장, 최대엽의 장, 폭등 개체생장이 증대되고 개화일수가 짧았으나 건조엽의 품질은 낮았다. 2 토양수분이 많을수록 생엽중 엽록소와 카로티노이드 함량이 높고, 건조엽중 니코틴, 석유에텔 유출물, 전질소함량이 낮았으며, 회분함량 및 pH는 높아졌다. 3. 토양수분이 많을수록 배휘발생 유기산과 고급지방산 함량이 높았으나 차이는 크지 않았다. 4. 토양수분이 많을수록 향미엽의 특성성분인 3-methyl pentanoic acid 등의 휘발성 유기산 함량의 감소가 컸으며 대부분의 휘발성 중성부 함량도 감소 경향이었다. 5. 토양수분이 다른 조건에서 생육한 잎담배의 품질을 비교하기 위해서는 석유에텔 추출물, 휘발성 유기산, 휘발성 중성부, 회분함량 및 pH등을 이용한 지수가 바람직하였다.

• 한국연초학회지
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• 제7권1호
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• pp.33-38
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• 1985

In spite of their inferior quality, pale yellow flue-cured tobacco varieties (N. tabacum L.) are being cultivated as pre-crop of rice in paddy field because of its early leaf maturity. Fertile and male sterile Hicks as green variety , three pale yellow varieties and six single cross $F_1$ hybrids between green and pale yellow varieties, were evaluated. Fertile $F_1$ hybrids were similar to pale yellow varieties in early leaf maturity, curing characters and nicotine contents, where-as they were lower in total nitrogen, higher in reducing sugar comparing to those of the pale yellow varieties.

• 한국연초학회지
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• 제7권1호
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• pp.39-47
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• 1985

Normally cultured aromatic tobaccos, KA 101 and KA 103, were primed progressively in three-leaf segments, either 7 days before bud, bud, or early flower stage with 7 days interval, respectively, The cured leaves were weighed for yield, graded, analyzed for quality-related constituents including volatile aroma components. Also the cured leaves were manufactured and smoked by panelists. Yield and quality by price decreased with advancing ripeness. Reducing sugar, total nitrogen, protein nitrogen decreased with successive ripeness, but reverse in this trends with nicotine, petroleum ether extracts and volatile acids components. Among volatile neutral components, furfural, furfuryl alcohol, benzyl alcohol, penethyl alcohol and p-cresol decreased, but solanone increased with delayed harvest. Neophytadiene, oxysolanone, furfuryl aceton was highest at mid harvest, which was judged to be best by panelists. Mid harvest, first primed at bud stage when leaf color comes to pale green to yellow green, seems to be highly recommendable.

• 한국연초학회지
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• 제19권1호
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• pp.18-23
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• 1997

The study was carried out to clarify reasonable production of healthy seedling, optimal Pot depth, and appropriate transplanting time, which can be deduced from understanding of seedling quality. Seedling quality results from growth of root and shoot, morphology and distribution of root system under influence of Pot depth during seedling growing period. Stem height, shoot dry weight, leaf area and leaf number were increased in proportion to depth of pots. Growth of shoot and root during seedling growing period showed the most dramatic development between 20th and 25th day after temporary planting. Root number increased as pot depth decrease and total root length and dry weight increased as pot depth increase. In 5cm pot, relative multiplication rate was higher and mean extension rate was lower than other depth of Pot. The limitation of pot volume in which rhizosphere was located enhance the development of roots of second and third order. At 20th days after temporary Planting root distribution was relatively uniform in length and development of adventitious root on stem base was poor as Pot depth decreased.

• 한국연초학회지
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• 제5권2호
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• pp.39-46
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• 1983

In order to obtain the basic information for the most successful breeding of Burley tobacco, these studies were performed on the correlations among agronomic characters and on the heterosis and combining ability in $F_1$ generation. Heterosis ratio was highly variable in different $F_1$ combinations. Positive heterosis was observed in all characters except days to flowering and yield showed the highest heterosis ratio. As the results of analysis of dialled table, the general combining ability (GCA) in all characters was shown to be significant . All characters except the number of leaves in the specific combining ability (SCA) were significant, Variety, L8, contributed negative GCA for all characters. Burley 21, ky 10 and ky 14 contributed negative GCA for leaf width, quality and yield, respectively. Hybrid of ky 10 x ky 14 showed negative SCA and hybrids of ky I0x L8 and ky 14 x L8 showed positive SCA for all characters. There were significant correlations between yield and number of leaves, leaf length, leaf width or leaf area. Correlation between yield and days to flowering was non- significant .

• 한국연초학회지
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• 제16권1호
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• pp.34-42
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• 1994

Experiments on the variability of plant type and factors representing the productivity and quality of the cultivars were subsequently carried out in relation to different plant density. Results are summarized as below. The higher was the plant density, the greater was the plant height and mean leaf inclination(MLI). As the plant density increased, the horizontal leaf area distribution became greater in proximal to the stem in NTN 77 and Br.49 but evenly in distal part in Br.21. Meanwhile, in terms of vertical leaf area distribution, it was decreased much more in middle and lower leaves than in upper in NTN 77 and Br.49 although it steadily decreased in any part of the plant in Br.21. Br.49 was the largest but Br.21 and NTN 77 were similar with respect to both CGR and NAR. The yield was greater in larger MLI cultivars(NTN 77>Br.49>Br.21). These three characteristics became greater when the tobacco were planted more densely in the field. Dry leaf weight and dry matter weight per plant were heavier in the larger MLI and increased with lower plant density. Total nitrogen content was greater in lower plant density and larger MLI cultivar. The plant density increases filling power seems to be enhanced regardless to the plant type. There was no discernible tendency on combustibility according to the plant density or plant type.