Compound fertilizer for improving tobacco leaf oil content and preparation method

Abstract

The invention relates to the technical field of bio-fertilizers, in particular to a compound fertilizer for improving tobacco leaf oil content and a preparation method of the compound fertilizer. According to the organic fertilizer, the fermented fertilizer, the potash fertilizer and the microelement fertilizer are reasonably proportioned and applied aiming at the general deficiency of tobacco leaf oil content, so that effective component factors such as amino acid, phytic acid and phospholipid required by tobacco can be supplemented, coordination of chemical components in the tobacco leaves is promoted, the oil content of the flue-cured tobacco leaves can be effectively improved, and the aroma quality of the tobacco leaves is further improved; and the method is beneficial to subsequent processing and production of the flue-cured tobacco, and has important significance for improving industrial availability and smoking quality of the tobacco leaves.

Description

Technical Field

[0001] The invention relates to the technical field of biological fertilizers, and in particular to a compound fertilizer for increasing the oil content of tobacco leaves and a preparation method thereof. Background Art

[0002] As an economic crop of my country's agricultural industry, tobacco plays an important role in the development of my country's agricultural industry and economy, and also plays an active role in China's economic development and national construction in modern times. Tobacco leaves are processed into various tobacco products through industrial processing to meet the needs of smokers. Although tobacco products are not necessities in people's lives, they have become an indispensable hobby in the lives of the majority of smokers. The oil content of flue-cured tobacco is closely related to the elasticity, toughness, hygroscopicity, maturity, physical and chemical properties, and smoke quality of tobacco leaves, and plays an important role in tobacco leaf grading. The oil content reflects the quality of tobacco leaves to a certain extent. Tobacco leaves with high oil content in the same part have correspondingly improved physical properties, chemical composition, and smoking quality. The oil content profoundly affects the sensory evaluation quality of tobacco leaves. Tobacco leaves with more oil content have better aroma quality, lighter impurities, and a pure and comfortable aftertaste. Flue-cured tobacco oil content is of great significance in tobacco leaf production. At present, the oil content of tobacco leaves in many tobacco areas in my country is generally insufficient, which seriously restricts the application of high-quality tobacco leaves in high-end cigarette formulas.

[0003] During the growth of tobacco, the absorption of phytic acid, phospholipids and related inorganic nutrients is beneficial to the synthesis and accumulation of tobacco leaf oil, and promotes the secretion of related oil substances by glandular hairs on the surface of tobacco leaves. Tobacco leaf oil directly affects the quality and industrial plasticity of flue-cured tobacco. Therefore, it is quite necessary to develop a fertilizer that promotes tobacco oil secretion and improves the quality of flue-cured tobacco. Summary of the invention

[0004] In order to overcome the shortcomings of the above-mentioned technical defects, the present invention uses organic fertilizer obtained by fermenting sesame cake and soybean as raw materials, and combines them with trace elements to promote the coordination of the internal chemical components of tobacco leaves, effectively increase the oil content of tobacco leaves after baking, and improve the quality of tobacco leaves.

[0005] On the one hand, the present invention provides a compound fertilizer for increasing the oil content of tobacco leaves, comprising: 50-200 parts by mass of fermented organic fertilizer and 1-30 parts by mass of potash fertilizer; the fermented organic fertilizer is prepared by fermenting sesame cake and soybean in a mass ratio of (0.5-5):1.

[0006] Sesame cake is rich in nutrients such as nitrogen, phosphorus, potassium, etc., especially nitrogen. Soybeans are rich in protein and can release a large amount of nitrogen during the decomposition process, which is very beneficial for crops that require more nitrogen fertilizer to support their growth. Sesame cake and soybeans are selected to be fermented together as organic fertilizers and used with potassium fertilizers, which can promote the precipitation of each other's effective ingredients. The precipitated effective ingredients significantly promote the development of tobacco roots and the absorption of nutrients, thereby increasing tobacco oil secretion.

[0007] Further, it comprises 50-180 parts by mass of fermented organic fertilizer; or 50-150 parts by mass; or 80-150 parts by mass; or 80-130 parts by mass; or 80-110 parts by mass; or 100-110 parts by mass; or 50-100 parts by mass; or 60-90 parts by mass.

[0008] Further, it comprises 1-25 parts by mass of potash fertilizer; or 1-20 parts by mass; or 3-18 parts by mass; or 3-15 parts by mass; or 5-12 parts by mass; or 5-10 parts by mass.

[0009] Furthermore, the mass ratio of the sesame cake to soybean is (0.5-4):1; or (0.5-3):1; or (0.5-2):1; or (0.5-1):1; or (0.8-1.8):1; or (0.8-1.5):1; or (0.8-1.2):1; or (1-1.2):1.

[0010] Furthermore, it comprises 0.01-1 parts by weight of slow-release fertilizer and 1-10 parts by weight of strongly acidic cation exchange resin; the slow-release fertilizer is a porous carrier loaded with zinc fertilizer and boron fertilizer in a mass ratio of (1-3): (0.5-1).

[0011] Trace elements zinc and boron are closely related to physiological and biochemical processes such as the metabolic process of proteins, the synthesis mode of alkaloids, the transportation process of organic matter, and the relationship between other nutrients such as calcium and potassium. They can promote the coordination of the internal chemical components of tobacco leaves, thereby increasing the oil content of tobacco leaves. However, the inventors found that the influence of the effective content of boron and zinc on the oil content of tobacco leaves has an extreme effect. By gradually releasing the trace elements, the content of the two trace elements can be maintained in the optimal absorption range of tobacco roots, which greatly improves the utilization rate of the trace elements, so that it satisfies both biological effectiveness and chemical effectiveness, and can promote the coordination of the internal chemical components of tobacco leaves, thereby increasing the oil content of tobacco leaves; the strong acid cation exchange resin contains fixed -SO3H or -COOH, these functional groups can release H+ ions, can adjust the pH of the soil to keep it weakly acidic, promote the absorption of nutrients in the soil by the roots of tobacco plants, thereby affecting the formation of tobacco leaf oil.

[0012] Furthermore, the strong acid cation exchange resin can be one of HZ016 strong acid styrene cation exchange resin, D001 macroporous strong acid styrene cation exchange resin, 734 strong acid styrene cation exchange resin, and JK006 strong acid styrene cation exchange resin.

[0013] Furthermore, the mass ratio of the zinc fertilizer to the boron fertilizer is (0.5-1):1; or the mass ratio is (0.5-1):1.5; or the mass ratio is (0.5-1):2; or the mass ratio is (0.5-1):2.5; or the mass ratio is (0.5-1):3.

[0014] Furthermore, the boron fertilizer and the zinc fertilizer are both water-soluble salts; or the boron fertilizer is boric acid; or the zinc fertilizer is one of zinc sulfate and zinc acetate.

[0015] Furthermore, the porous carrier is one of zeolite, diatomaceous earth, activated carbon, bentonite, montmorillonite, vermiculite, halloysite, graphite, attapulgite, sepiolite, and asbestos; or one of zeolite and diatomaceous earth.

[0016] On the other hand, the present invention provides a method for preparing the above-mentioned compound fertilizer, comprising the following steps:

[0017] S1. First, sesame cake and soybeans are mixed and crushed in proportion, fermented and matured agents are added and mixed evenly, and fermented to obtain fermented organic fertilizer;

[0018] S2. Dissolve zinc fertilizer and boron fertilizer in water to prepare a mixed solution, spray the mixed solution evenly onto a porous carrier, use a granulator to obtain particles with a particle size of 0.5-5 mm, and bake the obtained particles at 50-60°C for 30-60 min, and then bake at 110-140°C for 30-60 min to obtain a slow-release fertilizer with a fertilizer loading of 8-10%;

[0019] S3. Evenly mix the fermented organic fertilizer, slow-release fertilizer and potash fertilizer according to the formula.

[0020] Furthermore, the fermentation and composting agent is cellulase and protease in a mass ratio of 1:1, the effective viable bacteria count is ≥1 billion / g, and the total enzyme activity is ≥150U / g.

[0021] Beneficial effects: The compound fertilizer of the present invention targets the general lack of oil in tobacco leaves. The fermentation fertilizer, potassium fertilizer and trace fertilizer are applied in a reasonable proportion, which can supplement the effective ingredient factors such as amino acids, phytic acid and phospholipids required by tobacco, and promote the coordination of the internal chemical components of tobacco leaves. It can effectively increase the oil content of flue-cured tobacco leaves, further improve the aroma quality of tobacco leaves, and have lighter impurities, which is beneficial to the subsequent processing and production of flue-cured tobacco, and is of great significance to improving the industrial availability and smoking quality of tobacco leaves. DETAILED DESCRIPTION

[0022] In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with specific embodiments. The experimental methods in the following examples that do not specify specific conditions are usually based on conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, percentages and parts are calculated by weight. Unless otherwise defined, all professional and scientific terms used in the text have the same meanings as those familiar to those skilled in the art. In addition, any method and material similar or equivalent to the recorded content can be applied to the present invention. The preferred implementation methods and materials described in the text are for demonstration purposes only.

[0023] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0024] The present invention finds that sesame cake is rich in nutrients such as nitrogen, phosphorus, potassium, etc., especially high in nitrogen content; soybeans are rich in protein and can release a large amount of nitrogen during the decomposition process, which is very beneficial to crops that need more nitrogen fertilizer to support their growth. The increase in potassium content helps to increase the oil content of tobacco leaves. The fermented fertilizer of sesame cake and soybeans and potassium fertilizer are reasonably matched, which can significantly promote the development of tobacco roots and the absorption of nutrients, thereby increasing the oil secretion of tobacco. Further, since trace elements zinc and boron can promote the coordination of the internal chemical components of tobacco leaves and increase the oil content of tobacco leaves, the extreme effect of trace elements can be reduced by changing the dosage of fermented fertilizer and potassium fertilizer and supplemented with trace element slow-release fertilizer, so that the content of the two trace elements can be kept in the optimal absorption range of tobacco roots, further promoting the coordination of the internal chemical components of tobacco leaves, and the strong acid cation exchange resin can adjust the pH of the soil by releasing H+ ions, thereby increasing the oil content of tobacco leaves.

[0025] One aspect of the present invention relates to a composition, comprising: fermented organic fertilizer and potash fertilizer; the fermented organic fertilizer is prepared by fermenting sesame cake and soybean;

[0026] Optionally, a slow-release fertilizer is a porous carrier loaded with zinc fertilizer and boron fertilizer.

[0027] Optional, a strongly acidic cation exchange resin.

[0028] In some embodiments, the potash fertilizer is one of potassium sulfate, potassium nitrate, and potassium chloride.

[0029] In some embodiments, the boron fertilizer and the zinc fertilizer are both water-soluble salts; in some preferred embodiments, the boron fertilizer is boric acid; and the zinc fertilizer is one of zinc sulfate and zinc acetate.

[0030] In some embodiments, the strong acid cation exchange resin can be one of HZ016 strong acid styrene cation exchange resin, D001 macroporous strong acid styrene cation exchange resin, 734 strong acid styrene cation exchange resin, and JK006 strong acid styrene cation exchange resin.

[0031] One aspect of the present invention relates to a first composition, comprising fermented organic fertilizer and potash fertilizer. In some embodiments, the first composition consists only of fermented organic fertilizer and potash fertilizer.

[0032] In some embodiments, the first composition can be used to increase the oil content of tobacco oil.

[0033] One aspect of the present invention relates to a second composition, comprising fermented organic fertilizer, potash fertilizer, slow-release fertilizer and strong acidic cation exchange resin. In some embodiments, the second composition can be used to increase the oil content of tobacco oil.

[0034] In some embodiments, the amount of the fermented organic fertilizer in the composition of the present invention can be 50-200 mass parts, 50-180 mass parts; or 50-150 mass parts; or 80-150 mass parts; or 80-130 mass parts; or 80-110 mass parts; or 100-110 mass parts; or 50-100 mass parts; or 60-90 mass parts.

[0035] In some embodiments, the amount of potash fertilizer in the composition of the present invention can be 1-30 parts by mass; or 1-25 parts by mass; or 1-20 parts by mass; or 3-18 parts by mass; or 3-15 parts by mass; or 5-12 parts by mass; or 5-10 parts by mass.

[0036] In some embodiments, the amount of the slow-release fertilizer in the composition of the present invention may be 0.01-1 parts by mass; or 0.01-0.8 parts by mass; or 0.01-0.5 parts by mass; or 0.05-0.3 parts by mass; or 0.05-0.2 parts by mass; or 0.08-0.15 parts by mass.

[0037] In some embodiments, the amount of the strongly acidic cation exchange resin in the composition of the present invention may be 1-10 parts by mass; or 1-8 parts by mass; or 1-6 parts by mass; or 1-4 parts by mass; or 3-9 parts by mass; or 3-7 parts by mass.

[0038] In some embodiments, the fermented organic fertilizer of the present invention is prepared by fermenting sesame cake and soybean in a mass ratio of (0.5-5):1; or the mass ratio of sesame cake and soybean is (0.5-4):1; or (0.5-3):1; or (0.5-2):1; or (0.5-1):1; or (0.8-1.8):1; or (0.8-1.5):1; or (0.8-1.2):1; or (1-1.2):1.

[0039] In some embodiments, the slow-release fertilizer of the present invention is a porous carrier loaded with zinc fertilizer and boron fertilizer in a mass ratio of (1-3): (0.5-1); or the mass ratio of the zinc fertilizer and the boron fertilizer is 1: (0.5-1); or the mass ratio is 1.5: (0.5-1); or the mass ratio is 2: (0.5-1); or the mass ratio is 2.5: (0.5-1); or the mass ratio is 3: (0.5-1).

[0040] In some embodiments, the porous carrier of the present invention is one of zeolite, diatomaceous earth, activated carbon, bentonite, montmorillonite, vermiculite, halloysite, graphite, attapulgite, sepiolite, and asbestos; or one of zeolite and diatomaceous earth.

[0041] One aspect of the present invention relates to a method for preparing the above-mentioned composite fertilizer, comprising the following steps:

[0042] S1. First, sesame cake and soybeans are mixed and crushed in proportion, fermented and matured agents are added and mixed evenly, and fermented to obtain fermented organic fertilizer;

[0043] In some embodiments, sesame cake, soybean, and fermentation compost are mixed uniformly in proportion, the moisture content is adjusted to about 30%, and a fermentation pile with a width of about 150 cm and a height of about 70 cm is made for fermentation. The fermentation process adopts high temperature fermentation, and the pile body temperature reaches 60° C. and then the pile is turned over for oxygen supply. The pile is made for 10 days, during which the pile is turned over 3 to 4 times to obtain fermented organic fertilizer;

[0044] S2. The zinc fertilizer and the boron fertilizer are dissolved in water to prepare a mixed solution, the mixed solution is evenly sprayed onto a porous carrier, and a granulator is used to obtain particles with a particle size of 0.5-5 mm. The obtained particles are first dried at 50-60 ° C for 30-60 min, and then dried at 110-140 ° C for 30-60 min to obtain a slow-release fertilizer with a fertilizer loading of 8-10%;

[0045] S3. Evenly mix the fermented organic fertilizer, slow-release fertilizer and potash fertilizer according to the formula.

[0046] In some embodiments, the fermentation compost is cellulase and protease in a mass ratio of 1:1, the effective viable bacteria count is ≥ 1 billion / g, and the total enzyme activity is ≥ 150U / g.

[0047] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments and appended tables. It should be understood that the following embodiments are only used to explain the present invention and are not used to limit the present invention.

[0048] Example 1

[0049] A compound fertilizer for increasing the oil content of tobacco leaves comprises: 50 parts by mass of fermented organic fertilizer and 3 parts by mass of potassium sulfate; the fermented organic fertilizer is prepared by fermenting sesame cake and soybean in a mass ratio of 1:1.

[0050] The fermented organic fertilizer is prepared by the following method: sesame cake and soybean are mixed in proportion and then crushed, a fermentation and decomposition agent is added and mixed evenly, the fermentation and decomposition agent is 1%wt of the organic material, the moisture is adjusted to about 30%, and a fermentation pile with a width of about 150cm and a height of about 70cm is made for fermentation. The fermentation process adopts high-temperature fermentation, the pile is piled for 10 days, and the pile body temperature reaches 60°C before turning and supplying oxygen. During the period, the pile is turned 3 to 4 times to prepare the fermented organic fertilizer, wherein the fermentation and decomposition agent is cellulase and protease with a mass ratio of 1:1, the effective viable bacteria count is ≥1 billion / g, and the total enzyme activity is ≥150U / g.

[0051] Example 2

[0052] A compound fertilizer for increasing the oil content of tobacco leaves comprises: 200 parts by mass of fermented organic fertilizer and 20 parts by mass of potassium sulfate; the fermented organic fertilizer is prepared by fermenting sesame cake and soybean in a mass ratio of 0.5:1.

[0053] The preparation method of fermented organic fertilizer is the same as that in Example 1.

[0054] Example 3

[0055] A compound fertilizer for increasing the oil content of tobacco leaves comprises: 120 parts by mass of fermented organic fertilizer and 18 parts by mass of potassium sulfate; the fermented organic fertilizer is prepared by fermenting sesame cake and soybean in a mass ratio of 2:1.

[0056] The preparation method of fermented organic fertilizer is the same as that in Example 1.

[0057] Example 4

[0058] A compound fertilizer for increasing the oil content of tobacco leaves comprises: 150 parts by mass of fermented organic fertilizer, 5 parts by mass of potassium chloride, 0.5 parts by mass of slow-release fertilizer, and 7 parts by mass of D001 macroporous strong acid styrene-based cation exchange resin; the fermented organic fertilizer is prepared by fermenting sesame cake and soybean in a mass ratio of 1:1; the slow-release fertilizer is a porous carrier loaded with zinc acetate and boric acid in a mass ratio of 2:1.

[0059] The fermented organic fertilizer is prepared by the following method: sesame cake and soybean are mixed in proportion and then crushed, and a fermentation agent is added and mixed evenly, wherein the fermentation agent is 1%wt of the organic material, and the moisture is adjusted to about 30%, and a fermentation pile with a width of about 150cm and a height of about 70cm is made for fermentation. The fermentation process adopts high-temperature fermentation, and the pile is piled for 10 days. When the pile temperature reaches 60°C, it is turned and thrown for oxygen supply, and the pile is turned 3 to 4 times during the period to prepare the fermented organic fertilizer, wherein the fermentation agent is cellulase and protease with a mass ratio of 1:1, the effective viable bacteria count is ≥1 billion / g, and the total enzyme activity is ≥150U / g;

[0060] The slow-release fertilizer is prepared by the following method: zeolite is ground to 200 mesh, zinc fertilizer and boron fertilizer are dissolved in water according to a ratio to prepare a mixed solution, the mixed solution is evenly sprayed on the powder, and particles with a particle size of 0.5-5 mm are obtained by a granulator. The obtained particles are first dried at 60°C for 60 minutes and then dried at 120°C for 40 minutes to obtain a slow-release fertilizer with a fertilizer loading of 8-10%.

[0061] Example 5

[0062] A compound fertilizer for increasing the oil content of tobacco leaves comprises: 110 parts by mass of fermented organic fertilizer, 8 parts by mass of potassium chloride, 0.3 parts by mass of slow-release fertilizer, and 3 parts by mass of 734-type strongly acidic styrene-based cation exchange resin; the fermented organic fertilizer is prepared by fermenting sesame cake and soybean in a mass ratio of 1:1; the slow-release fertilizer is a porous carrier loaded with zinc sulfate and boric acid in a mass ratio of 2.5:1.

[0063] The preparation method of fermented organic fertilizer and slow-release fertilizer is the same as that in Example 4.

[0064] Example 6

[0065] A compound fertilizer for increasing the oil content of tobacco leaves comprises: 100 parts by mass of fermented organic fertilizer, 5 parts by mass of potassium chloride, 0.1 parts by mass of slow-release fertilizer, and 5 parts by mass of D001 macroporous strong acid styrene-based cation exchange resin; the fermented organic fertilizer is obtained by fermenting sesame cake and soybean in a mass ratio of 1:1; the slow-release fertilizer is a porous carrier loaded with zinc acetate and boric acid in a mass ratio of 1:1.

[0066] The preparation method of fermented organic fertilizer and slow-release fertilizer is the same as that in Example 4.

[0067] Example 7

[0068] A compound fertilizer for increasing the oil content of tobacco leaves comprises: 100 parts by mass of fermented organic fertilizer, 7 parts by mass of potassium chloride, 0.1 parts by mass of slow-release fertilizer, and 5 parts by mass of 734-type strongly acidic styrene-based cation exchange resin; the fermented organic fertilizer is prepared by fermenting sesame cake and soybean in a mass ratio of 1:1; the slow-release fertilizer is a porous carrier loaded with zinc sulfate and boric acid in a mass ratio of 3:1.

[0069] The preparation method of fermented organic fertilizer and slow-release fertilizer is the same as that in Example 4.

[0070] Comparative Example 1

[0071] The same as Example 1, except that potassium sulfate was not added, and 5 parts by mass of monoammonium phosphate were added.

[0072] Comparative Example 2

[0073] The same as Example 4, except that no slow-release fertilizer is added and 0.5 parts by mass of zinc acetate is added.

[0074] Comparative Example 3

[0075] The same as Example 5, except that no slow-release fertilizer is added and 0.3 parts by mass of boric acid is added.

[0076] Comparative Example 4

[0077] The method is the same as Example 1, except that the fermented organic fertilizer is chicken manure; and the preparation method of the chicken manure fermented organic fertilizer is: piling up the chicken manure and naturally fermenting it for 20 days.

[0078] Comparative Example 5

[0079] The same as Example 6, except that no strongly acidic cation exchange resin is added.

[0080] Comparative Example 6

[0081] The same as Example 7, except that zinc acetate is not added to the slow-release fertilizer.

[0082] Comparative Example 7

[0083] The same as Example 7, except that no boric acid is added to the slow-release fertilizer.

[0084] Test example:

[0085] Test plot: soil pH 6.1, average organic matter content 3.62g / kg, average available nitrogen content 85.23mg / kg, average available phosphorus content 48.14mg / kg, average available potassium content 137mg / kg.

[0086] Tobacco variety: Yunyan 87;

[0087] Treatment group: the organic fertilizer described in Examples 1 to 7 and Comparative Examples 1 to 4 was used as base fertilizer, the application rate of base fertilizer was 65 kg / mu, and it was applied in furrows after ridge formation; no topdressing was performed;

[0088] Blank group: No basal fertilizer was applied, and common tobacco topdressing fertilizer (NPK: 15-0-30) was applied to the soil as topdressing fertilizer to carry out tobacco cultivation management.

[0089] After the tobacco leaves were harvested and baked, the tobacco oil was extracted by ultrasonic-assisted Soxhlet extraction. The experimental results are shown in Table 1.

[0090] Table 1

[0091] Group Example 1 Example 2 Example 3 Example 4 Example 5 Oil extraction rate, % 10.12 9.25 9.79 14.29 14.82 Group Example 6 Example 7 Comparative Example 1 Comparative Example 2 Comparative Example 3 Oil extraction rate, % 13.82 15.49 8.11 12.58 13.17 Group Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Blank Group Oil extraction rate, % 7.26 11.09 14.75 14.89 6.23

[0092] As can be seen from the above table, each embodiment of the treatment group can effectively improve the oil content of tobacco leaves after curing as a base fertilizer, and the tobacco oil content of Examples 4-7 is increased by 4-6% compared to Examples 1-3. The reasonable proportion of fermented fertilizer, potash fertilizer and micro-fertilizer is more conducive to the formation of tobacco oil than the combined application of organic fertilizer and inorganic fertilizer. Compared with the embodiment, it can be seen that the increase of phosphorus element and tobacco oil are not very related. Compared with the embodiment, the tobacco oil of Comparative Example 4-5 is reduced by 2-3%. It can be seen that the fermented organic fertilizer of the present invention is more conducive to the formation of tobacco oil, and the soil can be kept weakly acidic by strong acid cation exchange resin, thereby promoting the formation of tobacco oil; Compared with the embodiment, it can be seen that the mixed application of trace elements boron and zinc is more conducive to the formation of tobacco oil, but the content of trace elements boron and zinc exceeds the limit value, which will hinder the growth and development of tobacco plants and hinder the production of tobacco oil.

[0093] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, those skilled in the art can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the protection scope of the present invention.

Claims

1. A compound fertilizer for increasing the oil content of tobacco leaves, characterized in that: include: 50-200 parts by weight of fermented organic fertilizer and 1-30 parts by weight of potash fertilizer; the fermented organic fertilizer is prepared by fermenting sesame cake and soybean in a mass ratio of (0.5-5):

1.

2. The compound fertilizer according to claim 1, characterized in that The invention comprises 50-180 parts by mass of fermented organic fertilizer; or 50-150 parts by mass; or 80-150 parts by mass; or 80-130 parts by mass; or 80-110 parts by mass; or 100-110 parts by mass; or 50-100 parts by mass; or 60-90 parts by mass.

3. The compound fertilizer according to claim 1, characterized in that The invention comprises 1-25 parts by mass of potash fertilizer; or 1-20 parts by mass; or 3-18 parts by mass; or 3-15 parts by mass; or 5-12 parts by mass; or 5-10 parts by mass.

4. The compound fertilizer according to claim 1, characterized in that The mass ratio of the sesame cake to the soybean is (0.5-4):1; or (0.5-3):1; or (0.5-2):1; or (0.5-1):1; or (0.8-1.8):1; or (0.8-1.5):1; or (0.8-1.2):1; or (1-1.2):

1.

5. The compound fertilizer according to claim 1, characterized in that It further comprises 0.01-1 parts by weight of slow-release fertilizer and 1-10 parts by weight of strongly acidic cation exchange resin; the slow-release fertilizer is a porous carrier loaded with zinc fertilizer and boron fertilizer in a mass ratio of (1-3): (0.5-1).

6. The compound fertilizer according to claim 1, characterized in that The mass ratio of the zinc fertilizer to the boron fertilizer is 1:(0.5-1); or the mass ratio is 1.5:(0.5-1); or the mass ratio is 2:(0.5-1); or the mass ratio is 2.5:(0.5-1); or the mass ratio is 3:(0.5-1).

7. The compound fertilizer according to claim 1, characterized in that The boron fertilizer and the zinc fertilizer are both water-soluble salts; or the boron fertilizer is boric acid; or the zinc fertilizer is one of zinc sulfate and zinc acetate.

8. The compound fertilizer according to claim 1, characterized in that The porous carrier is one of zeolite, diatomite, activated carbon, bentonite, montmorillonite, vermiculite, halloysite, graphite, attapulgite, sepiolite and asbestos; or one of zeolite and diatomite.

9. The method for preparing a composite fertilizer according to any one of claims 5 to 8, characterized in that: The following steps are involved: S1. After sesame cake and soybeans are mixed and crushed in proportion, fermentation compost is added and mixed evenly, and fermented organic fertilizer is obtained by stacking and fermentation; S2. Dissolve zinc fertilizer and boron fertilizer in water to prepare a mixed solution, spray the mixed solution evenly onto a porous carrier, use a granulator to obtain particles with a particle size of 0.5-5 mm, and bake the obtained particles at 50-60°C for 30-60 min, and then bake at 110-140°C for 30-60 min to obtain a slow-release fertilizer with a fertilizer loading of 8-10%; S3. Evenly mix the fermented organic fertilizer, slow-release fertilizer and potash fertilizer according to the formula.

10. The preparation method according to claim 9, characterized in that: The fermentation and decomposition agent is cellulase and protease in a mass ratio of 1:1, the effective viable bacteria count is ≥1 billion / g, and the total enzyme activity is ≥150U / g.