Baking method for increasing output rate of upper deep orange tobacco leaves

Abstract

The invention discloses a baking method for increasing the output rate of upper deep orange tobacco leaves. A process technology of slowly and continuously heating and slowly reducing the relative humidity of air in the curing barn is adopted, the baking time of each shed (layer) of tobacco leaves in the baking room in a temperature and humidity range suitable for quality modulation is ensured tobe sufficient and the difference is not large, therefore, each shed (layer) of tobacco leaves can be promoted to be fully yellowed, macromolecular substances can be fully or moderately degraded and converted, more aroma substances can be generated, the color can be fixed in time, the quality can be consolidated, each shed of tobacco leaves of the whole kang can be baked to be yellow, ripe and soft, and the baking quality, the hierarchical structure and the industrial availability of the tobacco leaves of the whole kang are improved. By means of the method, the yield of the upper deep orange tobacco leaves can be remarkably increased, and the yield of the upper deep orange tobacco leaves is increased by 43.95% compared with that of a conventional stepped temperature rise baking process in production. The quality of the upper leaves can be improved, the weight of the first-class tobacco is improved by 16.96% compared with that of a production upper step temperature rise baking process, and the grade structure of the upper leaves is improved.

Description

technical field [0001] The invention belongs to the technical field of tobacco leaf curing, and in particular relates to a curing method for improving the output rate of upper dark orange tobacco leaves. Background technique [0002] With the increasingly fierce competition in the cigarette market, the cigarette industry has higher and higher requirements for the quality of its raw tobacco leaves. However, at present, the upper tobacco leaves of my country’s flue-cured tobacco generally have problems such as insufficient maturity, light color, less oil content, thicker leaves, tight and stiff structure, etc., resulting in low quality and usability of the upper leaves. It is difficult to use in the cigarette industry, and there is a large backlog . Upper Dark Orange Leaves (BFO) is the collective name of Hunan China Tobacco Industry Co., Ltd. for a class of upper tobacco leaves of flue-cured tobacco that are characterized by deep orange color, bright luster, soft structure, h...

AI Technical Summary

Problems solved by technology

This kind of baking process heats up quickly during the yellowing period, and the free water content of the upper leaves is relatively small, so the dehydration of the tobacco leaves is earlier and faster, the stomata on the leaf surface are closed earlier, and the interior of the tobacco leaves is in a reduced state earlier, inhibiting the drying process. The activity of amylase is reduced, and the free water content is reduced too much, which also reduces the activity of amylase, which is not conducive to the moderate and sufficient degradation and conversion of starch, the chemical component with the most content in fresh tobacco leaves, resulting in excessive starch content in the upper tobacco leaves after roasting. It is light, and the ratio of dark orange tobacco leaves (BFO) in the upper part is low; even some tobacco leaves are dehydrated and dried earlier and the curing time is insufficient during the yellowing period, resulting in insufficient post-ripening, which will also lead to insufficient degradation of other macromolecular substances, especially when harvested mature The chlorophyll of the upper leaves with low humidity cannot be fully degraded, and the tobacco leaves are blue in different degrees after roasting. The tobacco leaves have a tight structure and poor quality, which reduces or even loses industrial usability.

These have made it difficult to sell some upper tobacco leaves in the southern Anhui tobacco area, and they cannot be sold or have to be sold at a reduced price

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