Compound fertilizer for improving oil content of tobacco leaves and preparation method thereof

Abstract

The present application relates to the technical field of biological fertilizer, and particularly relates to a compound fertilizer for improving oil content of tobacco leaves and a preparation method, wherein the organic fertilizer comprises fermented organic fertilizer, potassium fertilizer and micro-fertilizer.The organic fertilizer of the present application is aimed at the general shortage of oil content of tobacco leaves, and the fermented fertilizer, potassium fertilizer and micro-fertilizer are reasonably matched and applied, so that the effective component factors such as amino acid, phytic acid and phospholipid required by tobacco can be supplemented, and the coordination of the internal chemical components of tobacco leaves can be promoted, the oil content of cured tobacco leaves can be effectively improved, the aroma quality of tobacco leaves can be further improved, the miscellaneous gas is lighter, and it is beneficial to the subsequent processing and production of cured tobacco, and it has important significance for improving the industrial usability and smoking quality of tobacco leaves.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biological fertilizer, in particular to a compound fertilizer for improving oil content of tobacco leaves and a preparation method thereof. BACKGROUND

[0002] Tobacco is an economic crop in China's agricultural industry, playing an important role in the development of China's agricultural industry economy, and also playing 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 a necessity of life, they have become an indispensable indulgence in the lives of many smokers. The oil content of flue-cured tobacco is closely related to the elasticity, toughness, moisture absorption, maturity, and physicochemical properties of tobacco leaves, as well as the quality of tobacco smoke, and plays an important role in tobacco leaf grading. The oil content to some extent reflects the quality of tobacco leaves. The physical properties, chemical composition, and smoking quality of tobacco leaves with high oil content in the same part are improved accordingly. The oil content of tobacco leaves deeply affects the sensory evaluation and smoking quality of tobacco leaves, and tobacco leaves with high oil content have better aroma quality, lighter odor, and pure and comfortable aftertaste. The oil content of flue-cured tobacco is of great significance in tobacco production. At present, the oil content of tobacco leaves in many tobacco-growing areas in China 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 plant phytic acid, phospholipids, and related inorganic nutrient substances is beneficial to the synthesis and accumulation of tobacco oil, and promotes the secretion of related oil substances by the glandular hairs on the surface of tobacco leaves. The oil content of tobacco leaves directly affects the quality of flue-cured tobacco and its industrial plasticity. Therefore, it is quite necessary to develop a fertilizer that promotes the secretion of tobacco oil and improves the quality of flue-cured tobacco. SUMMARY

[0004] In order to overcome the above technical defects, the present application uses organic fertilizer prepared by fermenting sesame cake and soybeans as raw material, and adds trace elements to promote the coordination of the internal chemical composition of tobacco leaves, effectively improve the oil content of cured tobacco leaves, and improve the quality of tobacco leaves.

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

[0006] Sesame cake is rich in nutrients such as nitrogen, phosphorus, and potassium, especially high in nitrogen content; soybeans are rich in protein and can release a large amount of nitrogen during decomposition, which is very beneficial to crops that require more nitrogen fertilizer to support their growth. Therefore, by selecting sesame cake and soybeans for co-fermentation as an organic fertilizer and adding potassium fertilizer, the effective components of each other can be promoted to be separated out, and the separated effective components can significantly promote the development of tobacco root system and the absorption of nutrients, thereby improving the secretion of tobacco oil.

[0007] Further, the fermentation organic fertilizer comprises 50-180 parts by mass; 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, the potassium fertilizer comprises 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.

[0009] Further, the mass ratio of the sesame cake and 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.

[0010] Further, the slow-release fertilizer comprises 0.01-1 parts by mass, and the strong-acid cation exchange resin comprises 1-10 parts by mass; 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] The trace elements zinc and boron are closely related to physiological and biochemical processes such as the metabolism of proteins, the synthesis of alkaloids, the transportation of organic matter, and the relationship between calcium, potassium and other nutrients, and can promote the coordination of the internal chemical composition of tobacco leaves, thereby increasing the oil content of tobacco leaves. However, the inventors have found that the effective content of boron and zinc has an extreme effect on the oil content of tobacco leaves. By gradually releasing the trace elements, the content of the two trace elements can be maintained within the optimal absorption range of tobacco roots, greatly improving the utilization rate of trace elements, meeting the biological and chemical effectiveness at the same time, promoting the coordination of the internal chemical composition of tobacco leaves, and thereby increasing the oil content of tobacco leaves. The strong-acid cation exchange resin contains fixed -SO3H or -COOH, and these functional groups can release H+ ions, adjust the pH of the soil to maintain weak acidity, and promote the absorption of nutrients by the roots of tobacco plants, thereby affecting the formation of tobacco oil.

[0012] Further, the strong-acid cation exchange resin can be one of HZ016 type strong-acid styrene cation exchange resin, D001 type macroporous strong-acid styrene cation exchange resin, 734 type strong-acid styrene cation exchange resin, and JK006 type 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] In another aspect, the present invention provides a method for preparing the above-mentioned compound fertilizer, comprising the following steps:

[0017] S1. First, sesame cake and soybeans were mixed and crushed in proportion, fermentation compost was added and mixed evenly, and fermentation was performed to obtain fermented organic fertilizer;

[0018] S2. The zinc fertilizer and boron fertilizer were dissolved in water to form a mixed solution, the mixed solution was evenly sprayed onto a porous carrier, and a granulator was used to obtain particles with a particle size of 0.5-5 mm. The resulting particles were 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 load 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 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. By applying fermentation fertilizer, potassium fertilizer and trace fertilizer in a reasonable proportion, the compound fertilizer 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 that the technical solutions of the present application can be better understood, the present application will be described in detail below with specific reference to the embodiments. The experimental methods in the following examples, unless otherwise specified, are generally in accordance with the conventional conditions or the conditions recommended by the manufacturers. Unless otherwise specified, percentages and parts are by weight. Unless otherwise defined, all the professional and scientific terms used herein have the same meanings as those familiar to those skilled in the art. In addition, any method and material similar or equivalent to those described herein can be applied to the present application. The preferred implementation methods and materials described herein are only for demonstration.

[0023] The endpoints of the ranges and any values disclosed herein are not limited to the precise values stated. The ranges or values should be construed to be approximations that allow for significant variations. Various ranges of values that are endpoints are included in the smaller range between them. Various other ranges can be derived from the taught ranges by adding or subtracting from the upper or lower limits of the ranges. Any numerical value, however, can inherently contain certain errors necessarily resulting from the round-off or measurement of its components. Accordingly, it is the stated numerical value plus or minus ten percent (10%) or ten percent (10%) of the value should the value be about 100 or greater.

[0024] The present application finds that the sesame cake is rich in nutrients such as nitrogen, phosphorus, potassium, and especially high in nitrogen content; the soybean contains rich protein and can release a large amount of nitrogen in the decomposition process, which is very beneficial to crops that need more nitrogen fertilizer to support their growth, and the increase of potassium content helps to increase the oil content of tobacco leaves. The fermentation fertilizer of sesame cake and soybean and the potassium fertilizer can significantly promote the development of tobacco root system and the absorption of nutrients, thereby improving the secretion of tobacco oil. Further, since trace elements zinc and boron can promote the coordination of the internal chemical composition of tobacco leaves and increase the oil content of tobacco leaves, by changing the dosage of the fermentation fertilizer and the potassium fertilizer and supplementing with trace element slow-release fertilizer, the extreme effect of trace elements can be reduced, the content of the two trace elements can be kept in the optimal absorption range of tobacco root system, the coordination of the internal chemical composition of tobacco leaves can be further promoted, 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] The present application relates to a composition, comprising: a fermentation organic fertilizer and a potassium fertilizer; the fermentation organic fertilizer is prepared by fermentation of sesame cake and soybean;

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

[0027] Optionally, a strong acid cation exchange resin.

[0028] In some embodiments, the potassium 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 type strong acid styrene cation exchange resin, D001 type macroporous strong acid styrene cation exchange resin, 734 type strong acid styrene cation exchange resin, and JK006 type strong acid styrene cation exchange resin.

[0031] In some embodiments, the first composition can be used to increase the oil content of tobacco tar.

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

[0033] In some embodiments, the second composition can be used to increase the oil content of tobacco tar.

[0034] In some embodiments, the amount of the fermented organic fertilizer in the composition of the present application can be 50-200 parts by mass, 50-180 parts by mass, 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.

[0035] In some embodiments, the amount of the potassium fertilizer in the composition of the present application 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 application can 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 strong acid cation exchange resin in the composition of the present application can 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 application is prepared from sesame cake and soybean in a mass ratio of (0.5-5):1; or the mass ratio of the sesame cake and 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.

[0039] In some embodiments, the slow-release fertilizer of the present application 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 application is one of zeolite, diatomite, activated carbon, bentonite, montmorillonite, vermiculite, halloysite, graphite, attapulgite, sepiolite, and asbestos; or one of zeolite and diatomite.

[0041] In one aspect, the present application relates to a preparation method of the compound fertilizer described above, comprising the following steps:

[0042] S1. First, mix and crush the sesame cake and the soybean in a proportion, then add a fermentation and maturation agent and mix uniformly, and stack and ferment to prepare the fermented organic fertilizer;

[0043] In some embodiments, the sesame cake, the soybean, and the fermentation and maturation agent are mixed uniformly in a proportion, the moisture content is adjusted to about 30%, a fermentation pile with a width of about 150 cm and a height of about 70 cm is made, and fermentation is performed, the fermentation process adopts high-temperature fermentation, the pile temperature reaches 60℃, and then oxygen is supplied by turning and throwing, the pile is turned over 3-4 times during 10 days of pile preparation, and the fermented organic fertilizer is prepared;

[0044] S2. Dissolve the zinc fertilizer and the boron fertilizer in water to prepare a mixed solution, uniformly spray the mixed solution onto the porous carrier, and use a granulator to prepare particles with a particle size of 0.5-5 mm, the obtained particles are first baked at 50-60℃ for 30-60 min, and then baked at 110-140℃ for 30-60 min, to prepare a slow-release fertilizer with a fertilizer loading amount of 8-10%;

[0045] S3. Mix the fermented organic fertilizer, the slow-release fertilizer, and the potassium fertilizer uniformly according to the formula.

[0046] In some embodiments, the fermentation and maturation agent is cellulase and protease in a mass ratio of 1:1, the effective viable bacterial count is ≥10 billion / g, and the total enzyme activity is ≥150 U / g.

[0047] The technical solutions of the present application are further described in detail below in combination with specific embodiments and the accompanying tables. It should be understood that the following embodiments are only used to explain the present application and not used to limit the present application.

[0048] Embodiment 1

[0049] The compound fertilizer for improving oil content of tobacco leaves comprises 50 parts by mass of fermented organic fertilizer and 3 parts by mass of potassium sulfate, wherein the fermented organic fertilizer is prepared by fermenting sesame cake and soybean at a mass ratio of 1:1.

[0050] The fermented organic fertilizer is prepared by the following method: the sesame cake and the soybean are mixed at a proper ratio, then crushed, and then mixed with a fermentation and maturation agent at 1% wt of the organic material, and then adjusted to about 30% of water content, and then made into a fermentation pile with a width of about 150 cm and a height of about 70 cm, and then fermented, and then taken high-temperature fermentation during the fermentation process, and then turned over for oxygen supply after the pile temperature reaches 60℃ for 10 days, and then turned over for 3-4 times during the period, thereby obtaining the fermented organic fertilizer, wherein the fermentation and maturation agent is cellulase and protease at a mass ratio of 1:1, the effective number of viable bacteria is greater than or equal to 10 billion / g, and the total enzyme activity is greater than or equal to 150 U / g.

[0051] Embodiment 2

[0052] The compound fertilizer for improving oil content of tobacco leaves comprises 200 parts by mass of fermented organic fertilizer and 20 parts by mass of potassium sulfate, wherein the fermented organic fertilizer is prepared by fermenting sesame cake and soybean at a mass ratio of 0.5:1.

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

[0054] Embodiment 3

[0055] The compound fertilizer for improving oil content of tobacco leaves comprises 120 parts by mass of fermented organic fertilizer and 18 parts by mass of potassium sulfate, wherein the fermented organic fertilizer is prepared by fermenting sesame cake and soybean at a mass ratio of 2:1.

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

[0057] Embodiment 4

[0058] The compound fertilizer for improving 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 type macroporous strong acid styrene cation exchange resin, wherein the fermented organic fertilizer is prepared by fermenting sesame cake and soybean at a mass ratio of 1:1, and the slow-release fertilizer is a porous carrier loaded with zinc acetate and boric acid at a mass ratio of 2:1.

[0059] The fermentation organic fertilizer is prepared by the following method: the sesame cake and the soybean are mixed in proportion, then are crushed, the fermentation and rotting agent is added and uniformly mixed, the fermentation and rotting agent is 1%wt of the organic material, the moisture is adjusted to about 30%, a fermentation pile with a width of about 150cm and a height of about 70cm is made, and fermentation is carried out, the high-temperature fermentation is adopted in the fermentation process, the pile is prepared for 10 days, the pile temperature reaches 60 DEG C, then turning over is carried out for oxygen supply, the pile is turned over for 3-4 times during the period, and the fermentation organic fertilizer is prepared, wherein the fermentation and rotting agent is cellulase and protease with a mass ratio of 1:1, the effective viable bacterial count is greater than or equal to 10 billion / g, and the total enzyme activity is greater than or equal to 150 U / g.

[0060] The slow-release fertilizer is prepared by the following method: the zeolite is ground to about 200 meshes, the zinc fertilizer and the boron fertilizer are dissolved in water according to the proportion to prepare a mixed solution, the mixed solution is uniformly sprayed on the powder, and the granulator is used to prepare the particles with a particle size of 0.5-5mm, the obtained particles are first baked at 60 DEG C for 60min, and then baked at 120 DEG C for 40min, and the slow-release fertilizer with a fertilizer loading of 8-10% is prepared.

[0061] Example 5

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

[0063] The preparation methods of the fermentation organic fertilizer and the slow-release fertilizer are the same as those in Example 4.

[0064] Example 6

[0065] A compound fertilizer for improving oil content of tobacco leaves, comprising: fermentation organic fertilizer 100 parts by mass, potassium chloride 5 parts by mass, slow-release fertilizer 0.1 parts by mass, and D001 type strong acid cation exchange resin 5 parts by mass; the fermentation organic fertilizer is prepared by fermentation of sesame cake and soybean with a mass ratio of 1:1; the slow-release fertilizer is a porous carrier loaded with zinc acetate and boric acid with a mass ratio of 1:1.

[0066] The preparation methods of the fermentation organic fertilizer and the slow-release fertilizer are the same as those in Example 4.

[0067] Example 7

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

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

[0070] Comparative Example 1

[0071] The same as Example 1, except that 5 parts by mass of monoammonium phosphate is added instead of potassium sulfate.

[0072] Comparative Example 2

[0073] The same as Example 4, except that 0.5 parts by mass of zinc acetate is added instead of the slow-release fertilizer.

[0074] Comparative Example 3

[0075] The same as Example 5, except that 0.3 parts by mass of boric acid is added instead of the slow-release fertilizer.

[0076] Comparative Example 4

[0077] 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 as follows: chicken manure is stacked and naturally fermented for 20 days.

[0078] Comparative Example 5

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

[0080] Comparative Example 6

[0081] The same as Example 7, except that no zinc acetate is 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 field: the average value of soil PH is 6.1, the average value of organic matter content is 3.62 g / kg, the average value of available nitrogen content is 85.23 mg / kg, the average value of available phosphorus content is 48.14 mg / kg, and the average value of available potassium content is 137 mg / kg.

[0086] Tobacco variety: Yunyan 87;

[0087] Treatment group: the organic fertilizer described in Examples 1-7 and Comparative Examples 1-4 is used as base fertilizer, and the application amount of the base fertilizer is 65 kg / mu, which is applied in a ditch after ridging; no topdressing is applied;

[0088] Blank group: no base fertilizer is applied, and the tobacco common topdressing (N-P-K: 15-0-30) is applied as topdressing to the soil for cultivation and management of tobacco.

[0089] After the tobacco leaves are harvested and roasted, the tobacco oil is extracted by ultrasonic-assisted Soxhlet extraction method. 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 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 increase the oil content of the roasted tobacco leaves as base fertilizer, and the tobacco oil content of examples 4-7 is increased by 4-6% compared with examples 1-3, and the reasonable matching application of fermented fertilizer, potassium fertilizer and microelement fertilizer is more conducive to the formation of tobacco oil than the combined application of organic fertilizer and inorganic fertilizer. Compared with examples, it can be seen from comparative examples 1 that the increase of phosphorus element has little relationship with the tobacco oil content, and the tobacco oil content of comparative examples 4-5 is reduced by 2-3% compared with examples, so the fermented organic fertilizer of the present application is more conducive to the formation of tobacco oil, and the strong acid cation exchange resin can keep the soil weakly acidic, thereby promoting the formation of tobacco oil; as can be seen from comparative examples 2-3 and comparative examples 6-7 compared with examples, 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 exceeding the limit value 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 the preferred embodiment of the present application, and those skilled in the art can make various similar expressions under the inspiration of the present application without violating the purpose and claims of the present application, and such changes fall within the protection scope of the present application.

Claims

1. A compound fertilizer for increasing the oil content of Yunyan 87 tobacco leaves, characterized in that: include: 50-200 parts by mass of fermented organic fertilizer, 1-30 parts by mass of potassium fertilizer, 0.01-1 parts by mass of slow-release fertilizer, and 1-10 parts by mass 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); the fermented organic fertilizer is prepared by fermenting sesame cake and soybean in a mass ratio of (0.5-5):1 with a fermentation composting agent, the fermentation 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.

2. The compound fertilizer according to claim 1, characterized in that The invention comprises 50-180 parts by mass of fermented organic fertilizer.

3. The compound fertilizer according to claim 1, characterized in that The invention comprises 80-130 parts by mass of fermented organic fertilizer.

4. The compound fertilizer according to claim 1, characterized in that The invention comprises 50-100 parts by mass of fermented organic fertilizer.

5. The compound fertilizer according to claim 1, characterized in that The invention comprises 60-90 parts by mass of fermented organic fertilizer.

6. The compound fertilizer according to claim 1, characterized in that Contains 1-25 parts by mass of potash fertilizer.

7. The compound fertilizer according to claim 1, characterized in that Including 3-15 parts by mass of potash fertilizer.

8. The compound fertilizer according to claim 1, characterized in that Including 5-10 parts by mass of potash fertilizer.

9. The compound fertilizer according to claim 1, characterized in that The mass ratio of the sesame cake to soybean is (0.5-4):

1.

10. The compound fertilizer according to claim 1, characterized in that The mass ratio of the sesame cake to soybean is (0.5-2):

1.

11. The compound fertilizer according to claim 1, characterized in that The mass ratio of the sesame cake to soybean is (0.8-1.5):

1.

12. The compound fertilizer according to claim 1, characterized in that The mass ratio of the sesame cake to soybean is (1-1.2):

1.

13. 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).

14. The compound fertilizer according to claim 1, characterized in that The mass ratio of the zinc fertilizer to the boron fertilizer is 2:(0.5-1).

15. The compound fertilizer according to claim 1, characterized in that The mass ratio of the zinc fertilizer to the boron fertilizer is 3:(0.5-1).

16. The compound fertilizer according to claim 1, characterized in that The boron fertilizer and zinc fertilizer are both water-soluble salts.

17. The compound fertilizer according to claim 1, characterized in that The boron fertilizer is boric acid.

18. The compound fertilizer according to claim 1, characterized in that The zinc fertilizer is one of zinc sulfate and zinc acetate.

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

20. The compound fertilizer according to claim 1, characterized in that The porous carrier is one of zeolite and diatomaceous earth.