| A systematically and comprehensively analysis was applied in this paper to characterize the flue-cured tobacco middle leaves'quality and main ecological factors in Nan ping area, which was mainly observed at five aspects including the apparent quality, sensory quality of smoking, routine chemical components, ecological factors to obtain the relationship between tobacco quality and chemical components. All of these acquired results would provide fairly important theoretical basis on the further improving of characteristic tobacco leaves quality and the improvement of cultivation skills in Nan ping area. The primary results were as follows:1. The characteristic climates of Nanping areaThe characteristic climates of the first region(â… ) where belongs to northern part of Nanping area, such as Guangze, Wuyishan and Shaowu were like this: monthly average temperature was fairly low, and average sunlight hours was quite short, while monthly average rainfall was comparatively high which lead to a high monthly relative humidity; The characteristic climates of the second region(â…¡) such as Jian'ou, Shunchang, Jianyang were like this: monthly average temperature was moderate, and average sunlight hours was quite long, while monthly average rainfall was comparatively low which lead to a low monthly relative humidity. The characteristic climates of the third region (â…¢) where belongs to southern part of Nanping area, such as Zhenghe, Songxi, Pucheng, were like this: monthly average temperature was high, monthly rainfall was moderate with low monthly humidity, while Yanping region, which was located in the southern part of Nanping area, had a fairly high monthly temperature, fairly more hours of sunshine and monthly rainfall.2. The relationship between chemical components of flue-cured tobacco leaves and sensory quality in Nan ping areaTotal sugar, reducing sugar, ratio of sugar to alkaloid, total alkaloid, and volatile alka-loid had an extensive influence on sensory quality of smoking, and the correlativity was indicated to a quite marked level. In addition, total sugar, reducing sugar, ratio of sugar to alkaloid expressed a positive effect, while total alkaloid and volatile alkaloid expressed a negative effect; Aroma components such as pyridine,octoic acid, malic acid, neochloroge-nic acid, 2-methyltetrahydrofuran, butanedioic acid, linoleic acid, dibutyl phthalate, had a positive influence with a high correlativity; Neophytadiene, butanoic acid, phenylacetaldehyd-e, alpha-terpineol, valeric acid, beta-damascone, 2-phenyl-ethyl acetate, geranylacetone, ben-zyl alcohol, benzene alcohol, and megastigmatrienone had a rather high negative influence on sensory quality of smoking, with the correlation efficiency to a rather marked level. 3. Comparative analysis on different tobacco varieties and fertilized measureThe diversity of chemical components of different middle tobacco leaf varieties were as follows: total sugar, reducing sugar, ratio of sugar to alkaloid in tobacco CB-1 and Hongda were much more than those in tobacco Yunyan85, Yunyan87 and K326, while total alkaloid and total nitrogen in in tobacco CB-1 and Hongda were much less than those in tobacco Yunyan85, Yunyan87 and K326. Without considering environment, fertilizer, tobacco quality in the tobacco planting area, the effects on employing organic fertilizer, potassium nitrate and kalium sulphate together were better than employing organic fertilizer single; employing dairy manure in tobacco C3F would obtain better sensory quality than employing cake fertilizer or chicken manure.3. The relationship between the quality of flue-cured tobacco leaves and the main ecological factors in Nanping regionThe climate factors such as average temperature and rainfall in March, average temperature, rainfall and hours of sunshine in April, average hours of sunshine in May had a large influence on the chemical components of the tobacco leaves in Nanping region. In the survey of investigating all the climate factors, an interesting result was found that average temperature and hours of sunshine in March and April, average rainfall in June, and average hours of sunshine in July had a positive effect,while average rainfall and relative humidity in March, had a negative effect. The soil factors of alkaline hydrolysis N, total N, had a positive effect on routine chemical components such as ratio of sugar to alkaloid total nitrogen and total sugar, and had a negative effect on ratios of nitrogen to alkaline, total alkaline and reducing sugar. The soil factors of organic material, exchangeable Mg, available S, and hydrolysis Cl had a negative effect on routine chemical components such as ratio of sugar to alkaloid, total nitrogen and total sugar, and had a positive effect on ratios of nitrogen to alkaline, total alkaline and reducing sugar.
|
PDF Full Text Request