Baking process of new flue-cured tobacco variety Zhongchuan 208

Abstract

The invention relates to the technical field of tobacco baking, and particularly discloses a baking process of a new flue-cured tobacco variety Zhongchuan 208. According to the process, different temperature and humidity combinations are adopted for conducting stage baking on tobacco leaves of the Zhongchuan 208, so that the tobacco leaves of the Zhongchuan 208 are subjected to a sweating period, a yellowing period, a stem changing period, a color fixing period and a stem drying period, and finally baking is completed. Through accurate matching of temperature and humidity of all stages, the tobacco leaves of the Zhongchuan 208 variety are accurately baked, the grade structure, the appearance quality and the sensory evaluation quality of the baked tobacco leaves of the Zhongchuan 208 variety are greatly improved, and meanwhile chemical components of the baked tobacco leaves are more coordinated.

Description

Technical Field

[0001] The invention relates to the technical field of tobacco baking, and in particular to a baking process of a new flue-cured tobacco variety, Zhongchuan 208. Background Art

[0002] Fresh tobacco leaves harvested from the fields can only become raw materials for use in the cigarette industry after being baked and cured. In the agricultural production of tobacco leaves, baking and curing have always been regarded as the key technologies and play a decisive role in the quality of tobacco leaves.

[0003] Each flue-cured tobacco variety has its own baking characteristics. Different baking characteristics require corresponding adjustments to the baking process used. If the existing baking process is used or the baking process of other varieties is copied, baking accidents are likely to occur, such as baking green, baking dregs, baking red, smoothness, and stiffness. In the field of tobacco leaf baking, generally speaking, varieties with good quality tend to have relatively poor baking characteristics, while varieties with average quality tend to have better baking characteristics. Since the development of the new flue-cured tobacco variety Zhongchuan 208, its smoking quality after baking has been highly praised by the tobacco industry across the country. However, the existing baking process has not fully demonstrated the economic and quality characteristics of this variety, and even serious ash often occurs during the baking process, causing great economic losses to tobacco farmers. It also reduces the appearance quality of tobacco leaves, seriously affects the chemical composition and smoking quality of tobacco leaves after baking, and reduces the industrial use value.

[0004] Therefore, it is necessary to design a matching baking process for a new flue-cured tobacco variety Zhongchuan 208 to solve the problems of serious ash hanging, reduced appearance quality of tobacco leaves, inconsistent chemical composition of tobacco leaves, low smoking quality, and low industrial use value in the existing baking process. Summary of the invention

[0005] In view of this, the present invention proposes a baking process for a new flue-cured tobacco variety Zhongchuan 208, aiming to solve the problems of serious ash sticking, reduced appearance quality of tobacco leaves, inconsistent chemical composition of tobacco leaves, low smoking quality and low industrial use value in the existing baking process.

[0006] The present invention proposes a baking process for a new flue-cured tobacco variety, Zhongchuan 208, comprising the following steps:

[0007] Sweating period: put Zhongchuan 208 into the baking room and ignite it immediately after installing the kang, and start the first stage of baking. The first stage of baking ends when the first stage of baking time is reached or the tobacco leaves reach the target state;

[0008] Yellowing period: After the first stage of baking, adjust the dry bulb and wet bulb temperatures to carry out the second stage of baking. After the end, adjust the dry bulb and wet bulb temperatures to carry out the third stage of baking.

[0009] Gluten change period: after the third stage of baking, the dry bulb and wet bulb temperatures are adjusted to carry out the fourth stage of baking. After the fourth stage of baking, the dry bulb and wet bulb temperatures are further adjusted to carry out the fifth stage of baking.

[0010] Color fixing period: after the fifth stage of baking is completed, the dry bulb and wet bulb temperatures are adjusted, and the sixth stage of baking is carried out. After the sixth stage of baking is completed, the dry bulb and wet bulb temperatures are adjusted again, and the seventh stage of baking is carried out;

[0011] Drying stage: after the seventh stage of baking is completed, the dry bulb and wet bulb temperatures are adjusted, and the eighth stage of baking is carried out. After the eighth stage of baking is completed, the baking is stopped.

[0012] Furthermore, the first stage of baking is specifically as follows: the temperature of the baking room is raised to 38°C by uniformly increasing the temperature for 5-8 hours, and then constant temperature baking is started, and the fan speed is 680-760r / min; the first stage of baking time is: constant temperature baking for 6-8 hours for the lower tobacco leaves, and constant temperature baking for 8-10 hours for the middle and upper tobacco leaves; the dry bulb temperature of the first stage of baking is 37.5°C-38.5°C, and the wet bulb temperature is 37°C-38°C, and the target state is: the glass of the observation window of the baking room is obviously covered with water droplets, the tobacco leaves turn 20%-30% yellow, and the dry-bulb and wet-bulb temperature difference is less than 0.5 degrees.

[0013] Furthermore, the temperature change rate of the dry bulb and wet bulb in the second stage baking and the third stage baking is 0.3-1°C / h; the dry bulb temperature in the second stage baking is 39.5°C-40.5°C, and the wet bulb temperature is 37.5°C-38.5°C; the dry bulb temperature in the third stage baking is 41.5°C-42.5°C, and the wet bulb temperature is 36.5°C-37.5°C.

[0014] Furthermore, the baking time of the second stage baking is 18-22 hours, and the fan speed is 680-760r / min; the baking time of the third stage baking is 20-22 hours, and the fan speed is 680-760r / min.

[0015] Furthermore, the rate of change of dry-bulb and wet-bulb temperatures in the fourth stage baking and the fifth stage baking is 0.1-0.5°C / h; the dry-bulb temperature in the fourth stage baking is 44.5°C-45.5°C, and the wet-bulb temperature is 36.5°C-37.5°C; the dry-bulb temperature in the fifth stage baking is 46.5°C-47.5°C, and the wet-bulb temperature is 37.5°C-38.5°C.

[0016] Furthermore, the baking time of the fourth stage baking and the fifth stage baking is 10-12 hours, and the fan speed during baking is 960-1440r / min.

[0017] Furthermore, the dry-bulb and wet-bulb temperature change rates in the sixth stage of baking are 0.1-0.5°C / h, and the dry-bulb and wet-bulb temperature change rates in the seventh stage of baking are 0.3-1°C / h; the dry-bulb temperature in the sixth stage of baking is 50°C, and the wet-bulb temperature is 38°C-39°C; in the seventh stage of baking, the dry-bulb temperature is 54°C, and the wet-bulb temperature is 39°C-40°C.

[0018] Furthermore, the baking time of the sixth stage baking and the seventh stage baking is 8-12 hours, and the fan speed is 960-1440r / min.

[0019] Furthermore, the dry-bulb and wet-bulb temperature change rates in the eighth stage of baking are 0.3-1°C / h; in the eighth stage of baking, the dry-bulb temperature is 65-68°C, and the wet-bulb temperature is 41°C-42°C.

[0020] Furthermore, the baking time of the eighth stage baking is 22-24 hours, and the fan speed is 680-760r / min.

[0021] Compared with the prior art, the beneficial effects of the present invention are: by precisely controlling the baking temperature of Zhongchuan 208 during the sweating period, yellowing period, tendon change period, color fixing period and tendon drying period, the occurrence of serious dusting during baking is avoided, while the appearance quality of tobacco leaves is improved, the adverse effects of existing baking technology on the chemical composition and smoking quality of tobacco leaves are reduced, and the industrial use value of Zhongchuan 208 tobacco leaves after baking is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0023] Figure 1 This is a flow chart of the baking process of the new flue-cured tobacco variety Zhongchuan 208 provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] Each flue-cured tobacco variety has its own baking characteristics. Different baking characteristics require corresponding adjustments to the baking process used. If the existing baking process is used or the baking process of other varieties is copied, baking accidents are likely to occur, such as baking green, baking dregs, baking red, smoothness, and stiffness. In the field of tobacco leaf baking, varieties with good quality often have relatively poor baking characteristics, while varieties with average quality often have better baking characteristics. Since the new flue-cured tobacco variety Zhongchuan 208 was bred, its smoking quality after baking has been highly praised by tobacco industries across the country. However, the existing baking process has not fully demonstrated the economic and quality characteristics of this variety. Even during the baking process, serious ash often occurs, causing great economic losses to tobacco farmers. At the same time, it also reduces the appearance quality of tobacco leaves, seriously affects the chemical composition and smoking quality of tobacco leaves after baking, and reduces the industrial use value.

[0026] Therefore, it is necessary to design a matching baking process for a new flue-cured tobacco variety Zhongchuan 208 to solve the problems of serious ash hanging, reduced appearance quality of tobacco leaves, inconsistent chemical composition of tobacco leaves, low smoking quality, and low industrial use value in the existing baking process.

[0027] In some embodiments of the present invention, a baking process of a new flue-cured tobacco variety Zhongchuan 208 comprises the following steps:

[0028] Sweating period: put Zhongchuan 208 into the baking room and ignite it immediately after installing the kang, and start the first stage of baking. The first stage of baking ends when the first stage of baking time is reached or the tobacco leaves reach the target state;

[0029] Yellowing period: After the first stage of baking, adjust the dry bulb and wet bulb temperatures to carry out the second stage of baking. After the end, adjust the dry bulb and wet bulb temperatures to carry out the third stage of baking.

[0030] Gluten change period: after the third stage of baking, the dry bulb and wet bulb temperatures are adjusted to carry out the fourth stage of baking. After the fourth stage of baking, the dry bulb and wet bulb temperatures are further adjusted to carry out the fifth stage of baking.

[0031] Color fixing period: after the fifth stage of baking is completed, the dry bulb and wet bulb temperatures are adjusted, and the sixth stage of baking is carried out. After the sixth stage of baking is completed, the dry bulb and wet bulb temperatures are adjusted again, and the sixth stage of baking is carried out;

[0032] Drying period: after the seventh stage of baking is completed, the dry bulb and wet bulb temperatures are adjusted, and the eighth stage of baking is carried out. After the eighth stage of baking is completed, the baking is stopped;

[0033] It is understandable that the existing baking process often requires ignition overnight after installing the kang, or turning on the fan for several hours before ignition to dry the surface moisture of tobacco leaves harvested on rainy days. However, Zhongchuan 208 is a high-quality variety with relatively poor baking resistance. Therefore, the present invention ignites immediately after installing the kang, which can minimize the consumption of dry matter in the tobacco leaves before the yellowing ends, which makes it difficult for the subsequent tobacco leaves to fix their color.

[0034] Specifically, during the first stage of baking, generally when the first stage of baking time is reached, the tobacco leaves will reach the target state, but sometimes due to environmental factors, when the first stage of baking time is reached, the tobacco leaves cannot reach the target state. At this time, whether the first stage of baking is ended is judged by whether the tobacco leaves reach the target state; after the second stage of baking, more than 80% of the middle-layer tobacco leaves are 70% to 80% yellow, and the tobacco leaves are obviously soft and collapsed; after the third stage of baking, more than 80% of the middle-layer tobacco leaves are 90% to 10% yellow, and the leaf tips are dry 8-10cm, that is, the yellow leaves have blue veins, and the leaves are Sharp and pointed; after the fourth stage of baking, more than 80% of the middle-layer tobacco leaves are in the state of yellow flakes and yellow veins, and the low-temperature layer tobacco leaves are 90-10% yellow with the tips of the leaves curled at the edges; after the fifth stage of baking, all the low-temperature layer tobacco leaves are in the state of yellow flakes and yellow veins with the tips of the leaves curled at the edges; after the sixth stage of baking, more than 80% of the middle-layer tobacco leaves are in the state of large rolls, all the leaves are dry, and the main veins are more than 1 / 3 dry; after the seventh stage of baking, all the low-temperature layer tobacco leaves are in the state of large rolls, all the leaves are dry, and the main veins are more than 1 / 3 dry; after the eighth stage of baking, the main veins of the tobacco leaves are all dry.

[0035] In some embodiments of the present invention, the first stage of baking is specifically as follows: the temperature of the baking room is raised to 38°C by uniformly increasing the temperature for 5-8 hours, and then constant temperature baking is started, and the fan speed is 680-760r / min; the first stage baking time is: constant temperature baking of the lower tobacco leaves for 6-8 hours, and constant temperature baking of the middle and upper tobacco leaves for 8-10 hours; the dry-bulb temperature of the first stage baking is 37.5°C-38.5°C, and the wet-bulb temperature is 37°C-38°C, and the target state is: the glass of the baking room observation window is obviously covered with water droplets, the tobacco leaves turn 20-30% yellow, and the dry-bulb and wet-bulb temperature difference is less than 0.5 degrees; the heating time is preferably 7 hours; the constant temperature baking time of the lower tobacco leaves is preferably 7 hours; the constant temperature baking time of the middle and upper tobacco leaves is preferably 9 hours; the fan speed is preferably 720r / min; the dry-bulb temperature of the first stage baking is preferably 38°C, and the wet-bulb temperature is preferably 37.5°C.

[0036] It is understandable that uniformly increasing the temperature for 5-8 hours can prevent the tips or ears of the tobacco leaves in the high-temperature layer from being dried out by the hot dry air, resulting in the phenomenon of being roasted green.

[0037] In some embodiments of the present invention, the temperature change rate of the dry bulb and wet bulb in the second stage baking and the third stage baking is 0.3-1°C / h; the temperature change rate is preferably 0.5°C / h. The dry bulb temperature in the second stage baking is 39.5°C-40.5°C, and the wet bulb temperature is 37.5°C-38.5°C; the dry bulb temperature in the third stage baking is 41.5°C-42.5°C, and the wet bulb temperature is 36.5°C-37.5°C; the dry bulb temperature in the second stage baking is preferably 40°C, and the wet bulb temperature is preferably 38°C; the dry bulb temperature in the third stage baking is preferably 42°C, and the wet bulb temperature is preferably 37°C.

[0038] In some embodiments of the present invention, the baking time of the second stage baking is 18-22 hours, and the fan speed is 680-760r / min; the baking time of the third stage baking is 20-22 hours, and the fan speed is 680-760r / min; the second stage baking time is preferably 20 hours, and the fan speed is preferably 720r / min; the third stage baking time is preferably 21 hours, and the fan speed is preferably 720r / min.

[0039] In some embodiments of the present invention, the dry-bulb and wet-bulb temperature change rates in the fourth stage baking and the fifth stage baking are 0.1-0.5°C / h; the temperature change rate is preferably 0.3°C / h; the dry-bulb temperature in the fourth stage baking is 44.5°C-45.5°C, and the wet-bulb temperature is 36.5°C-37.5°C; the dry-bulb temperature in the fifth stage baking is 46.5°C-47.5°C, and the wet-bulb temperature is 37.5°C-38.5°C; the dry-bulb temperature in the fourth stage baking is preferably 45°C, and the wet-bulb temperature is preferably 37°C; the dry-bulb temperature in the fifth stage baking is preferably 47°C, and the wet-bulb temperature is preferably 38°C.

[0040] In some embodiments of the present invention, the baking time of the fourth stage baking and the fifth stage baking is 10-12 hours, and the fan speed during baking is 960-1440r / min; the baking time is preferably 11 hours, and the fan speed is preferably 1200r / min.

[0041] In some embodiments of the present invention, the dry-bulb and wet-bulb temperature change rates in the sixth stage of baking are 0.1-0.5°C / h, and the dry-bulb and wet-bulb temperature change rates in the seventh stage of baking are 0.3-1°C / h; the temperature change rate in the sixth stage of baking is preferably 0.3°C / h; the temperature change rate in the seventh stage of baking is preferably 0.5°C / h; the dry-bulb temperature in the sixth stage of baking is 50°C, and the wet-bulb temperature is 38°C-39°C; in the seventh stage of baking, the dry-bulb temperature is 54°C, and the wet-bulb temperature is 39°C-40°C; the wet-bulb temperature in the sixth stage of baking is preferably 39°C; the wet-bulb temperature in the seventh stage of baking is preferably 40°C.

[0042] In some embodiments of the present invention, the baking time of the sixth stage baking and the seventh stage baking is 8-12 hours, and the fan speed is 960-1440r / min; the baking time is preferably 10 hours, and the fan speed is preferably 1200r / min.

[0043] In some embodiments of the present invention, the dry-bulb and wet-bulb temperature change rates in the eighth stage of baking are 0.3-1°C / h°C / h; the temperature change rate is preferably 1°C / h; in the eighth stage of baking, the dry-bulb temperature is 65-68°C, and the wet-bulb temperature is 41°C-42°C; in the eighth stage of baking, the dry-bulb temperature is preferably 65°C, and the wet-bulb temperature is preferably 42°C.

[0044] In some embodiments of the present invention, the baking time of the eighth stage baking is 22-24 hours, and the fan speed is 680-760r / min; the baking time is preferably 23 hours, and the fan speed is preferably 720r / min.

[0045] Example 1

[0046] S1. Sweating period: put Zhongchuan 208 into the curing room and ignite it immediately after installing the kang. After the temperature rises to 38°C at a uniform speed, control the dry bulb temperature to 37.5°C and the wet bulb temperature to 37°C. The fan speed is 680r / min. Then, the lower tobacco leaves are baked at a constant temperature for 6 hours, and the middle and upper tobacco leaves are baked at a constant temperature for 8 hours. When the observation window glass of the curing room is obviously covered with water droplets, the tobacco leaves turn 20% to 30% yellow, and the dry-bulb and wet-bulb temperature difference is less than 0.5 degrees, it enters the yellowing period;

[0047] S2, yellowing stage: maintain a fan speed of 680r / min, adjust the dry bulb temperature to 39.5℃ and the wet bulb temperature to 37.5℃ at a rate of change of 0.3℃ / h, and bake at a constant temperature for 18 hours; then adjust the dry bulb temperature to 41.5℃ and the wet bulb temperature to 36.5℃ at a rate of change of 0.3℃ / h, and bake at a constant temperature for 20 hours before entering the gluten stage;

[0048] S3, color change period: adjust the fan speed to 960r / min, adjust the dry bulb temperature to 44.5℃ and the wet bulb temperature to 36.5℃ at a rate of change of 0.1℃ / h, and bake at a constant temperature for 10 hours; then adjust the dry bulb temperature to 46.5℃ and the wet bulb temperature to 36.5℃ at a rate of change of 0.1℃ / h, and bake at a constant temperature for 10 hours before entering the color fixation period;

[0049] S4, color fixing period: adjust the fan speed to 680r / min, adjust the dry bulb temperature to 50℃ and the wet bulb temperature to 38℃ at a rate of change of 0.1℃ / h, and bake at a constant temperature for 8 hours; then adjust the dry bulb temperature to 54℃ and the wet bulb temperature to 39℃ at a rate of change of 0.3℃ / h, and then enter the drying period after baking at a constant temperature for 8 hours;

[0050] S5, Drying period: Keep the fan speed at 680r / min, adjust the dry bulb temperature to 65℃ and the wet bulb temperature to 41℃ at a rate of 0.3℃ / h, and stop baking at a constant temperature for 22 hours.

[0051] Example 2

[0052] S1. Sweating period: put Zhongchuan 208 into the curing room and ignite it immediately after installing the kang. After the temperature rises to 38℃ at a uniform speed, the dry bulb temperature is controlled to be 38℃ and the wet bulb temperature is 37.5℃. The fan speed is 720r / min. Then, the lower tobacco leaves are baked at a constant temperature for 7 hours, and the middle and upper tobacco leaves are baked at a constant temperature for 9 hours. When the observation window glass of the curing room is obviously covered with water droplets, the tobacco leaves turn 20% to 30% yellow, and the dry-bulb and wet-bulb temperature difference is less than 0.5 degrees, it enters the yellowing period;

[0053] S2, yellowing stage: maintain a fan speed of 720r / min, adjust the dry bulb temperature to 40℃ and the wet bulb temperature to 38℃ at a rate of change of 0.5℃ / h, and bake at a constant temperature for 20 hours; then adjust the dry bulb temperature to 42℃ and the wet bulb temperature to 37℃ at a rate of change of 0.5℃ / h, and bake at a constant temperature for 21 hours before entering the gluten stage;

[0054] S3, color change period: adjust the fan speed to 1200r / min, adjust the dry bulb temperature to 45℃ and the wet bulb temperature to 37℃ at a rate of change of 0.3℃ / h, and bake at a constant temperature for 11 hours; then adjust the dry bulb temperature to 47℃ and the wet bulb temperature to 37℃ at a rate of change of 0.3℃ / h, and bake at a constant temperature for 11 hours before entering the color fixation period;

[0055] S4, color fixing period: adjust the fan speed to 720r / min, adjust the dry bulb temperature to 50℃ and the wet bulb temperature to 39℃ at a rate of change of 0.3℃ / h, and bake at a constant temperature for 10 hours; then adjust the dry bulb temperature to 54℃ and the wet bulb temperature to 40℃ at a rate of change of 0.5℃ / h, and bake at a constant temperature for 10 hours before entering the drying period;

[0056] S5, Drying period: Keep the fan speed at 720r / min, adjust the dry bulb temperature to 65℃ and the wet bulb temperature to 42℃ at a rate of 1℃ / h, and stop baking at a constant temperature for 23 hours.

[0057] Example 3

[0058] S1. Sweating period: put Zhongchuan 208 into the curing room and ignite it immediately after installing the kang. After the temperature rises to 38℃ at a uniform speed, control the dry bulb temperature to 38.5℃ and the wet bulb temperature to 38℃. The fan speed is 760r / min. Then, the lower tobacco leaves are baked at a constant temperature for 8 hours, and the middle and upper tobacco leaves are baked at a constant temperature for 10 hours. When the observation window glass of the curing room is obviously covered with water droplets, the tobacco leaves turn 20% to 30% yellow, and the dry-bulb and wet-bulb temperature difference is less than 0.5 degrees, it enters the yellowing period;

[0059] S2, yellowing stage: maintain a fan speed of 760r / min, adjust the dry bulb temperature to 40.5℃ and the wet bulb temperature to 38.5℃ at a rate of change of 1℃ / h, and bake at a constant temperature for 22 hours; then adjust the dry bulb temperature to 42.5℃ and the wet bulb temperature to 37.5℃ at a rate of change of 1℃ / h, and bake at a constant temperature for 22 hours before entering the gluten stage;

[0060] S3, color change period: adjust the fan speed to 1440r / min, adjust the dry bulb temperature to 45.5℃ and the wet bulb temperature to 37.5℃ at a rate of change of 0.5℃ / h, and bake at a constant temperature for 12 hours; then adjust the dry bulb temperature to 47.5℃ and the wet bulb temperature to 37.5℃ at a rate of change of 0.5℃ / h, and bake at a constant temperature for 12 hours before entering the color fixation period;

[0061] S4, color fixing period: adjust the fan speed to 760r / min, adjust the dry bulb temperature to 50℃ and the wet bulb temperature to 39℃ at a rate of change of 0.5℃ / h, and bake at a constant temperature for 12 hours; then adjust the dry bulb temperature to 54℃ and the wet bulb temperature to 40℃ at a rate of change of 1℃ / h, and then enter the drying period after baking at a constant temperature for 12 hours;

[0062] S5, Drying period: Keep the fan speed at 760r / min, adjust the dry bulb temperature to 68℃ and the wet bulb temperature to 42℃ at a rate of 1℃ / h, and stop baking at a constant temperature for 24 hours.

[0063] Effect test

[0064] The same amount of Zhongchuan 208 tobacco leaves of similar shape were divided into three groups, and were baked using the baking process in Example 2 of the present application, G1 "five-segment five-corresponding tobacco leaves intensive precision baking technology" and G2 "8-point precision baking process", and the key points of the three baking processes are as follows in Table 1:

[0065] Table 1 Comparison of key points of baking process of Example 2, baking process of G1 and baking process of G2

[0066]

[0067]

[0068] According to the national standard GB2635-1992, the appearance quality of three groups of flue-cured tobacco leaves was evaluated. The results are shown in Table 2:

[0069] Table 2 Appearance quality scores of Zhongchuan 208 tobacco leaves after different baking processes

[0070] Example 2 G1 G2 Color / score Orange(9.5) Orange(9.5) Orange(9.5) Maturity / score Mature (9.0) Mature (9.0) Mature (9.0) Structure / score Loose (9.0) Loose (9.0) Loose - (8.5) Identity / score Moderate (9.0) Medium - (8.5) Moderate (9.0) Oil content / value Yes (7.0) Yes (7.0) Yes - (6.5) Chroma / score Strong (7.0) Strong - (6.5) Medium (5.0) Weighted total score 8.525 8.425 8.175

[0071] Compared with the traditional G1 and G2 tobacco leaf baking processes, the Zhongchuan 208 baked by the baking process of Example 2 of the present invention has higher structure score, identity score, oil score, chroma score and total weight score in terms of tobacco leaf appearance quality. Especially in terms of chroma, the chroma score of the tobacco leaves baked by the present invention is much higher than that of the tobacco leaves baked by the G1 and G2 processes.

[0072] The chemical composition of the three groups of flue-cured tobacco leaves was tested, among which the total sugar and reducing sugar content were determined using the YC / T159-2002 method; the starch content was determined using the YC / T 216-2007 method; the protein content was determined using the YC / T 249-2008 method; the total nitrogen content was determined using the YC / T 161-2002 method; and the nicotine content was determined using the YC / T 160-2002 method. The results are shown in Table 3:

[0073] Table 3 Chemical composition of tobacco leaves of Zhongchuan 208 after different baking processes

[0074]

[0075]

[0076] It can be seen that compared with the traditional G1 and G2 tobacco leaf baking processes, the various chemical components in Zhongchuan 208 baked by the baking process of Example 2 of the present invention are more coordinated.

[0077] The sensory evaluation of tobacco leaves of the three groups after flue-cured tobacco leaves was carried out, and the results are shown in Table 4:

[0078] Table 4 Sensory evaluation of smoking quality of Zhongchuan 208 tobacco leaves after different baking processes

[0079] Example 2 G1 G2 concentration 6.4 6.3 6.1 Momentum 6.2 6.2 6 Fragrance 6.8 6.1 6.6 Aroma volume 6.8 6.2 6.5 Translucent 6.7 6.1 6.5 Miscellaneous gas 6.8 6.2 6.5 Irritant 7 6.2 6.8 Aftertaste 6.8 6.2 6.7 Sweetness 6.8 6.5 6.7 Combustibility 4 4 4 Ash 4 4 4 Weighted total score 76.1 69.95 73.95

[0080] It can be seen that compared with the traditional G1 and G2 tobacco leaf baking processes, the sensory smoking quality of Zhongchuan 208 baked by the baking process of Example 2 of the present invention is much higher than that of Zhongchuan 208 baked by the G1 and G2 processes.

[0081] The economic traits of the three groups of flue-cured tobacco leaves were compared, and the results are shown in Table 5:

[0082] Table 5 Economic characteristics of tobacco leaves of Zhongchuan 208 after baking with different baking processes

[0083]

[0084]

[0085] It can be seen that compared with the traditional G1 and G2 tobacco leaf baking processes, the proportion of high-quality tobacco leaves of Zhongchuan 208 baked by the baking process of Example 2 of the present invention is close to twice the proportion of high-quality tobacco leaves in the G1 and G2 baked tobacco leaves, so the industrial use value of Zhongchuan 208 baked by the baking process of the present invention is higher.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A baking process for a new flue-cured tobacco variety, Zhongchuan 208, characterized in that: The following steps are involved: Sweating period: put Zhongchuan 208 into the baking room and ignite it immediately after installing the kang, and start the first stage of baking. The first stage of baking ends when the first stage of baking time is reached or the tobacco leaves reach the target state; Yellowing period: After the first stage of baking, adjust the dry bulb and wet bulb temperatures to carry out the second stage of baking. After the end, adjust the dry bulb and wet bulb temperatures to carry out the third stage of baking. Gluten change period: after the third stage of baking, the dry bulb and wet bulb temperatures are adjusted to carry out the fourth stage of baking. After the fourth stage of baking, the dry bulb and wet bulb temperatures are further adjusted to carry out the fifth stage of baking. Color fixing period: after the fifth stage of baking is completed, the dry bulb and wet bulb temperatures are adjusted, and the sixth stage of baking is carried out. After the sixth stage of baking is completed, the dry bulb and wet bulb temperatures are adjusted again, and the seventh stage of baking is carried out; Drying stage: after the seventh stage of baking is completed, the dry bulb and wet bulb temperatures are adjusted, and the eighth stage of baking is carried out. After the eighth stage of baking is completed, the baking is stopped.

2. The baking process of the new flue-cured tobacco variety Zhongchuan 208 according to claim 1 is characterized in that: The first stage of baking is specifically as follows: the temperature of the baking room is raised to 38°C by uniformly increasing the temperature for 5-8 hours, and then constant temperature baking is started, and the fan speed is 680-760r / min; the first stage of baking time is: the lower tobacco leaves are baked at a constant temperature for 6-8 hours, and the middle and upper tobacco leaves are baked at a constant temperature for 8-10 hours; the dry bulb temperature of the first stage of baking is 37.5°C-38.5°C, and the wet bulb temperature is 37°C-38°C. The target state is: the glass of the observation window of the baking room is obviously covered with water droplets, the tobacco leaves turn 20%-30% yellow, and the dry-bulb and wet-bulb temperature difference is less than 0.5 degrees.

3. The baking process of the new flue-cured tobacco variety Zhongchuan 208 according to claim 1 is characterized in that: The temperature change rate of the dry bulb and wet bulb in the second stage baking and the third stage baking is 0.3-1°C / h; the dry bulb temperature in the second stage baking is 39.5°C-40.5°C, and the wet bulb temperature is 37.5°C-38.5°C; the dry bulb temperature in the third stage baking is 41.5°C-42.5°C, and the wet bulb temperature is 36.5°C-37.5°C.

4. The baking process of the new flue-cured tobacco variety Zhongchuan 208 according to claim 1 is characterized in that: The baking time of the second stage baking is 18-22 hours, and the fan speed is 680-760r / min; the baking time of the third stage baking is 20-22 hours, and the fan speed is 680-760r / min.

5. The baking process of the new flue-cured tobacco variety Zhongchuan 208 according to claim 1 is characterized in that: The dry-bulb and wet-bulb temperature change rates in the fourth-stage baking and the fifth-stage baking are 0.1-0.5°C / h; the dry-bulb temperature in the fourth-stage baking is 44.5°C-45.5°C, and the wet-bulb temperature is 36.5°C-37.5°C; the dry-bulb temperature in the fifth-stage baking is 46.5°C-47.5°C, and the wet-bulb temperature is 37.5°C-38.5°C.

6. The baking process of the new flue-cured tobacco variety Zhongchuan 208 according to claim 1 is characterized in that: The baking time of the fourth stage baking and the fifth stage baking is 10-12 hours, and the fan speed during baking is 960-1440r / min.

7. The baking process of the new flue-cured tobacco variety Zhongchuan 208 according to claim 1 is characterized in that: The dry-bulb and wet-bulb temperature change rates in the sixth stage of baking are 0.1-0.5°C / h, and the dry-bulb and wet-bulb temperature change rates in the seventh stage of baking are 0.3-1°C / h; the dry-bulb temperature in the sixth stage of baking is 50°C, and the wet-bulb temperature is 38°C-39°C; in the seventh stage of baking, the dry-bulb temperature is 54°C, and the wet-bulb temperature is 39°C-40°C.

8. The baking process of the new flue-cured tobacco variety Zhongchuan 208 according to claim 1 is characterized in that: The baking time of the sixth stage baking and the seventh stage baking is 8-12 hours, and the fan speed is 960-1440r / min.

9. The baking process of the new flue-cured tobacco variety Zhongchuan 208 according to claim 1, characterized in that: The dry-bulb and wet-bulb temperature change rates in the eighth stage of baking are 0.3-1°C / h; in the eighth stage of baking, the dry-bulb temperature is 65-68°C, and the wet-bulb temperature is 41°C-42°C.

10. The baking process of the new flue-cured tobacco variety Zhongchuan 208 according to claim 1, characterized in that: The baking time of the eighth stage baking is 22-24 hours, and the fan speed is 680-760r / min.

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