A tobacco leaf quality improvement and aroma enhancement agent and its application method

Abstract

The present invention provides a tobacco leaf quality-improving and aroma-enhancing modifier, which comprises polyacrylamide and glucose, and the mass ratio of the polyacrylamide to the glucose is 1:12.5-25. The present invention belongs to the technical field of plant growth regulation. The tobacco leaf quality-improving and aroma-enhancing modifier provided by the present invention is obtained by mixing polyacrylamide and glucose according to a certain mass ratio, and can effectively reduce the nicotine and total nitrogen contents in the middle and upper tobacco leaves, increase the total sugar and reducing sugar contents, increase the sweet aroma note, and improve the smoking quality of the tobacco leaves.

Description

Technical Field

[0001] The present invention belongs to the technical field of plant growth regulation, and particularly relates to a tobacco leaf quality improvement and aroma enhancement agent and an application method thereof. Background Art

[0002] Flue-cured tobacco is an important raw material for Chinese-style cigarettes. The aroma type and rhyme of flue-cured tobacco are important components of the style of Chinese-style cigarettes and important characteristics of the quality style of tobacco leaves. The aroma type is the comprehensive manifestation of all the aromas in the smoke when the tobacco leaf is burned, and the aroma rhyme is a certain aroma tone shown by the smoke.

[0003] The aroma type and rhyme of flue-cured tobacco are important bases for the procurement of cigarette raw materials and the design of cigarette formulas. The related research has been increasingly valued and has become a hot issue in current tobacco scientific research. Sweet and moistening the mouth, with a strong aftertaste of sweetness, are the characteristics of the sweet aroma rhyme, which is an important part of the tobacco leaf aroma rhyme and an outstanding style of high-end cigarette raw materials. The increase in sweetness is beneficial to improving the smoking quality of tobacco leaves. In addition, nicotine is also a key indicator for measuring the quality of tobacco leaves. Under the background of optimizing the structure of tobacco leaves in the field at present, the number of leaves left on the tobacco plants is reduced, and the phenomenon of excessive nicotine content in the middle and upper tobacco leaves is relatively common. The excessive nicotine content will have an adverse impact on its industrial usability.

[0004] Tobacco scientific research workers have developed products such as sweet aroma tobacco flavorings. However, the sweet flavorings for the cigarette industry are mainly added after the design of the leaf group is completed, resulting in an unclear aroma enhancement effect and being unable to improve the quality and usability of tobacco leaf raw materials from the source. Tobacco scientific research workers have conducted a large number of studies to reduce the nicotine content in tobacco leaves, mostly focusing on the optimization and improvement of varieties, fertilization, girdling technology, baking process, foliar spraying of growth regulators, etc. Generally, it is time-consuming and laborious, and there are also certain limitations in terms of technology and effect, which is not conducive to large-scale popularization and application. Chinese Patent Application CN 110326628A discloses a preparation for improving the aroma quantity and quality of tobacco leaves. The preparation is prepared by uniformly mixing the juice of fresh blooming magnolia flowers and rose flowers after removing the flower stalks extracted naturally and an auxiliary calcium carbonate nanomaterial, and spraying on the front and back of the leaves during field use. The preparation of this preparation has high requirements for raw materials, and the preparation and application are relatively complex. Therefore, it is of great significance to provide a simple, effective and easy-to-popularize tobacco leaf quality improvement and aroma enhancement agent. Summary of the Invention

[0005] To solve the problems existing in the prior art (such as insufficient sweet fragrance in the middle and upper tobacco leaves, and relatively high nicotine and total nitrogen contents), the inventor screened and compounded the components of the tobacco quality improvement and fragrance enhancer through a large number of experiments, and unexpectedly found that: the modifier obtained by mixing polyacrylamide and glucose in a certain mass ratio can effectively reduce the nicotine and total nitrogen contents in the middle and upper tobacco leaves, increase the total sugar and reducing sugar contents, increase the sweet fragrance, and improve the smoking quality of the tobacco leaves. Based on the above discovery, the present invention is completed.

[0006] The object of the present invention will be further embodied and illustrated by the following detailed description.

[0007] The present invention provides a tobacco quality improvement and fragrance enhancer, comprising polyacrylamide and glucose, and the mass ratio of the polyacrylamide to the glucose is 1:12.5 - 25.

[0008] Polyacrylamide is a linear organic polymer, which is currently mainly widely used in industries such as oil extraction, sewage treatment, and textile. The tobacco quality improvement and fragrance enhancer provided by the present invention is creatively obtained by mixing polyacrylamide and glucose in a certain mass ratio, utilizing the flocculation and adhesion properties of polyacrylamide, so that glucose particles can be quickly and effectively adsorbed and adhered to the tobacco plant roots and the root soil environment. Glucose has been reported to be used for spraying on the plant leaves to effectively increase the available sugar content in the fruits and leaves, but the operation of spraying on the plant leaves is more troublesome. However, the modifier obtained by mixing polyacrylamide and glucose in a certain mass ratio in the present application can be directly applied to the roots of tobacco plants after dilution, with simple operation, achieving dual effects. On the one hand, it is absorbed by the roots and transported to the leaves to increase the sugar content, and on the other hand, it is absorbed by soil microorganisms and promotes soil nitrogen fixation, reducing the soil nitrogen absorption by the tobacco plant roots, thereby effectively reducing the nicotine content in the middle and late stage tobacco leaves.

[0009] Preferably, the mass ratio of the polyacrylamide to the glucose is 1:20 - 25.

[0010] Preferably, the mass ratio of the polyacrylamide to the glucose is 1:20. When the mass ratio of polyacrylamide to glucose is 1:20, the overall effect of improving the quality and enhancing the fragrance of the tobacco quality improvement and fragrance enhancer is the best.

[0011] Preferably, the mass ratio of the polyacrylamide to the glucose is 1:25.

[0012] In addition, the present invention also provides a method for applying the tobacco quality improvement and fragrance enhancer, comprising the following steps: diluting and mixing the tobacco quality improvement and fragrance enhancer according to any one of claims 1 - 4 with water in a mass ratio of 1:1 - 4 to obtain a modifier irrigation solution; 6 - 8 days before the middle tobacco leaves of the first flue-cured tobacco are mature and harvested, slowly pour and irrigate the modifier irrigation solution along the bottom of the tobacco stalk onto the roots of the tobacco plants.

[0013] Preferably, the tobacco leaf quality-improving and aroma-enhancing modifier is diluted and mixed with water at a mass ratio of 1:2.

[0014] Preferably, the tobacco plants are those planted in tobacco fields with medium to high fertility.

[0015] Preferably, the application rate of the modifier irrigation solution to tobacco plants is 80 - 120 mL / plant.

[0016] More preferably, the application rate of the modifier irrigation solution to tobacco plants is 100 mL / plant.

[0017] Compared with the prior art, the beneficial effects of the present invention include:

[0018] The quality-improving and aroma-enhancing modifier provided by the present invention has a simple formula, a simple preparation method, and a wide range of raw material sources; compared with foliar spraying, the application method is more convenient to operate, the application rate is less, the quality-improving and aroma-enhancing effect is remarkable, it can effectively reduce the nicotine and total nitrogen content in the middle and upper tobacco leaves, increase the total sugar and reducing sugar content, increase the sweet aroma note, improve the smoking quality of tobacco leaves while reducing the cost. Detailed Description of the Invention

[0019] The present invention will be further described in detail below through specific examples.

[0020] In the present invention, the components and raw materials involved are all conventional commercially available products, or can be obtained by conventional technical means in the art.

[0021] Example 1 Tobacco Leaf Quality-Improving and Aroma-Enhancing Modifier

[0022] A tobacco leaf quality-improving and aroma-enhancing modifier, comprising polyacrylamide and glucose, and the mass ratio of the polyacrylamide to the glucose is 1:12.5.

[0023] Example 2 Tobacco Leaf Quality-Improving and Aroma-Enhancing Modifier

[0024] A tobacco leaf quality-improving and aroma-enhancing modifier, comprising polyacrylamide and glucose, and the mass ratio of the polyacrylamide to the glucose is 1:20.

[0025] Example 3 Tobacco Leaf Quality-Improving and Aroma-Enhancing Modifier

[0026] A tobacco leaf quality-improving and aroma-enhancing modifier, comprising polyacrylamide and glucose, and the mass ratio of the polyacrylamide to the glucose is 1:25.

[0027] Test Example 1

[0028] In 2022, at the Pingba experimental base in Anshun City, Guizhou Province, with the treatment of not applying the modifier to the roots of tobacco plants as the control, the experiment adopted a randomized block design, with 4 treatments and 3 replicates, for a total of 12 plots, and the area of each plot was 0.2 mu. The well-cell transplanting method was used; for each treatment, the transplanting density was 1,000 plants / mu (plant spacing: 1.1 m × 0.6 m), and 7.5 kg of pure nitrogen (including root-fixing fertilizer) was applied per mu. Seven days before the middle leaves of the first flue-cured tobacco were mature and harvested, a modifier was prepared by mixing polyacrylamide and glucose at a mass ratio of 1:20, and then the modifier irrigation solution was obtained by diluting it with water at different concentrations. The application rate per tobacco plant was 100 mL / plant, and the detection results of the relevant tobacco leaves are shown in Table 1.

[0029] The mass ratio dilution concentration ratio of the modifier to water is as follows:

[0030] CK: No modifier is applied, and clear water is used as the control;

[0031] Concentration 1: Diluted at a ratio of 1:1;

[0032] Concentration 2: Diluted at a ratio of 1:2;

[0033] Concentration 3: Diluted at a ratio of 1:4.

[0034] Table 1 Comparison of partial indexes of C3F grade tobacco leaves

[0035]

[0036] Note: For the routine chemical composition analysis and detection of tobacco leaf samples, YC / T 159-2002 (total sugar), YC / T 159—2002 (reducing sugar), YC / T 159—2002 (nicotine), and YC / T 161-2002 (total nitrogen) are used; the sensory evaluation standard for the quality style characteristics of tobacco leaves adopts a 9-scale, and the tobacco leaf samples are jointly scored by China Tobacco Jiangsu Industrial Co., Ltd. and Guizhou Tobacco Science Research Institute; the same below.

[0037] Experimental Example 2

[0038] In 2022, in Dafang County, Bijie City, Guizhou Province, with the treatment of not applying the modifier to the roots of tobacco plants as the control, 4 treatments were set up for a large-area experiment, and the area of each large area was 0.5 mu. The well-cell transplanting method was used; for each treatment, the transplanting density was 1,000 plants / mu (plant spacing: 1.1 m × 0.6 m), and 7.5 kg of pure nitrogen (including root-fixing fertilizer) was applied per mu. Seven days before the middle leaves of the first flue-cured tobacco were mature and harvested, the modifier irrigation solution was obtained by diluting different ratios of the modifier with water at a ratio of 1:2. The application rate per tobacco plant was 100 mL / plant, and the detection results of the relevant tobacco leaves are shown in Table 1.

[0039] The modifiers with different ratios of polyacrylamide to glucose are as follows:

[0040] CK: No soil conditioner is applied, and clear water is used as the control;

[0041] Ratio 1: 1:12.5;

[0042] Ratio 2: 1:20;

[0043] Ratio 3: 1:25;

[0044] Ratio 4: 1:10;

[0045] Ratio 5: 1:28;

[0046] Ratio 6: Only glucose is applied;

[0047] Ratio 7: Only polyacrylamide is applied.

[0048] Comparison of partial indexes of B2F grade tobacco leaves in Table 2

[0049]

[0050]

[0051] It can be seen from Table 1 and Table 2 that, compared with the control, the treatment method of applying a moderately proportioned soil conditioner can significantly increase the total sugar and reducing sugar contents, reduce the nicotine and total nitrogen contents in the middle and upper tobacco leaves, increase the sweet aroma and sweetness scores, and improve the usability of tobacco leaves. When the application rate of the soil conditioner solution on tobacco plants is 100 mL / plant, the effect is the best when the soil conditioner is prepared with the mass ratio of polyacrylamide to glucose of 1:20, and the soil conditioner is diluted with water at a ratio of 1:2 to obtain a soil conditioner irrigation solution for irrigating the roots of tobacco plants.

[0052] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present invention.

Claims

1. A method for applying a tobacco leaf quality-improving and aroma-enhancing modifier, characterized in that: It includes the following steps: Dilute and mix the tobacco leaf quality-improving and aroma-enhancing modifier with water at a mass ratio of 1:1-4 to obtain a modifier irrigation solution; 6-8 days before the middle part of the first flue-cured tobacco is maturely harvested, slowly pour the modifier irrigation solution along the bottom of the tobacco stalk onto the roots of the tobacco plants; the tobacco leaf quality-improving and aroma-enhancing modifier includes polyacrylamide and glucose, and the mass ratio of the polyacrylamide to the glucose is 1:20-25; the application amount of the modifier irrigation solution per tobacco plant is 80-120 mL / plant.

2. The method for applying a tobacco leaf quality-improving and aroma-enhancing modifier according to claim 1, characterized in that: The tobacco leaf quality-improving and aroma-enhancing modifier and water are diluted and mixed at a mass ratio of 1:

2.

3. The method for applying a tobacco leaf quality-improving and aroma-enhancing modifier according to claim 1, characterized in that: The tobacco plants are those planted in tobacco fields with medium to high fertility.

4. The method for applying a tobacco leaf quality-improving and aroma-enhancing modifier according to claim 1, characterized in that: The application amount of the modifier irrigation solution per tobacco plant is 100 mL / plant.

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