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Jiang H.,Chongqing Tobacco Science Research Institute | Jiang H.,Henan Agricultural University | Chen T.,Chongqing Tobacco Company | Ma H.,Chongqing Tobacco Company | And 3 more authors.
Tobacco Science and Technology | Year: 2014

In order to find out the main factors influencing the sensory quality of flue-cured tobacco in Chongqing tobacco growing areas, the relations of appearance quality, physical properties, chemical components, and the harmony between those components with the sensory quality of tobacco were investigated with canonical correlation analysis. The results showed that the total sugar content in tobacco leaves was moderate or higher, the ratio of sugar to nicotine was slightly higher; the contents of reducing sugar, nicotine, total nitrogen and the ratios of nitrogen to nicotine and potassium to chloride were appropriate; while the contents of potassium and chloride were lower. The aromatic quality of tobacco leaves mainly affected by and positively correlated to total sugar, the difference between total sugar and reducing sugar, the ratio of nitrogen to nicotine, leaf color and body. The smoke concentration and impact mainly affected by and positively correlated to nicotine, total nitrogen, weight per unit leaf area, leaf oil and body, while affected by and significantly negatively correlated to potassium and the ratios of sugar to nicotine and potassium to chloride. Offensive odor mainly affected by and positively correlated to total sugar, the ratio of nitrogen to nicotine and the difference between total sugar and reducing sugar. Smoke sweetness mainly affected by and positively correlated to the ratio of nitrogen to nicotine and the difference between total sugar and reducing sugar. Source


Jiang H.,Chongqing Tobacco Science Research Institute | Li N.,Chongqing Tobacco Science Research Institute | Shan P.,Dali Branch of Yunnan Province Tobacco Company | Wang H.,Chongqing Tobacco Science Research Institute | And 2 more authors.
Tobacco Science and Technology | Year: 2013

For producing flue-cured tobacco seedlings at the areas of low temperature and less sunshine, closed seedling producing technique was studied with a self-configured closed seedling production system for flue-cured tobacco, the working principle of the system was introduced and its specifications and parameters were determined. The results of experiments showed that it only needed 22 days for cultivating seedlings of 4.5 leaf age with this technique, which was 24 days shorter than that with a greenhouse floating seedling system; the stalk circumference of seedling, the dry weight of leaf, stalk and root, root-shoot ratio, and vigorous seedling index increased by 35.29%, 8.48%, 49.23%, 160.00%, 74.22% and 83.78%, respectively; moreover, the costs of direct and heeled-in transplanting of the seedlings from closed system reduced by 101.3 and 30.4 RMB yuan per 667 m2, respectively. Closed seedling producing technique effectively solved the problems of longer seedling age and lower vigorous seedling ratio at areas of low temperature and less sunshine, it reduced the consumption of non-renewable peat resource and more significantly the cost of seedling production. Source

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