Special organic-inorganic compound fertilizer for tea

Abstract

The invention discloses a special organic-inorganic compound fertilizer for tea, which belongs to the technical field of agricultural fertilizers and comprises the following raw materials in parts by weight: 15-25 parts of an inorganic fertilizer and 20-30 parts of an organic fertilizer, and the mass ratio of nitrogen to phosphorus to potassium in the inorganic fertilizer is (14-16): (2-4): (4-6); the organic fertilizer is prepared from the following raw materials in parts by weight: 30-40 parts of rapeseed dregs, 30-40 parts of tobacco stems, 60-70 parts of cow dung, 60-70 parts of pig manure, 60-70 parts of distillers' grains and 35-45 parts of mushroom dregs; tobacco stem alkali liquor and tobacco stem charcoal which are prepared through tobacco stem alkaline hydrolysis treatment and carbonization treatment are introduced and are coupled with a specific multi-stage pH directional fermentation process, and soil improvement with triple synergistic effects of chemical buffering, physical structure improvement and biological activity improvement is achieved. The fertilizer not only can efficiently and enduringly correct soil acidification and hardening, but also can synchronously and greatly improve the soil organic matter content and microbial community activity, and creates a healthy root domain micro-ecological environment for tea trees.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural fertilizer, in particular to a special organic-inorganic compound fertilizer for tea. BACKGROUND

[0002] The quality and yield of tea industry in China highly depend on the healthy soil environment. However, in the main tea-producing areas of China, if the unreasonable cultivation and fertilization mode is long-term, the tea garden soil will generally appear compound degradation, which is specifically manifested as soil acidification, accelerated soil hardening and unbalanced soil microbial community structure. These problems seriously restrict the root development and nutrient absorption of tea trees, and directly lead to the decline of tea yield and quality.

[0003] To cope with the above challenges, mixed application of organic-inorganic compound fertilizer can be used. However, the products or schemes in the prior art still have obvious deficiencies in application: firstly, the formula is not strong in pertinence, most products cannot provide long-lasting and mild acid-base buffering capacity, and cannot effectively resist the re-acidification of soil, and the improvement effect on soil pH is short-term; secondly, the processing technology of the organic component is rough, and the effect of synchronously and efficiently improving soil structure and microecology is limited; thirdly, the function is relatively single, and most products are limited to providing basic nutrients, and lack of comprehensive design for systematic and collaborative improvement of soil chemical properties, physical structure and biological activity.

[0004] In summary, the prior art still lacks a comprehensive fertilizer product that can systematically and collaboratively solve the problems of soil acidification, hardening and microbial activity decline. Therefore, it is urgent to develop a special organic-inorganic compound fertilizer that can simultaneously improve the degraded tea garden soil, improve the fertilizer utilization rate, and significantly improve the yield and quality of tea. SUMMARY

[0005] The present application aims to overcome the problem that most products in the prior art cannot provide long-lasting and mild acid-base buffering capacity, and cannot effectively resist the re-acidification of soil, and the improvement effect on soil pH is short-term, and simultaneously provides a special organic-inorganic compound fertilizer for tea that can collaboratively improve soil structure, activate microbial activity, and significantly improve the yield and quality of tea.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a special organic-inorganic compound fertilizer for tea, comprising the following raw materials by weight: inorganic fertilizer 15-25 parts, organic fertilizer 20-30 parts, the mass ratio of nitrogen, phosphorus and potassium elements in the inorganic fertilizer is 14-16, 2-4, 4-6; The organic fertilizer is composed of the following raw materials by weight: rapeseed meal 30-40 parts, tobacco stem 30-40 parts, cow dung 60-70 parts, pig manure 60-70 parts, vinasse 60-70 parts, and fungus residue 35-45 parts.

[0007] Further, the mass ratio of nitrogen, phosphorus and potassium in the inorganic fertilizer is 15:3:5.

[0008] Further, the organic fertilizer comprises tobacco stem components treated by alkaline hydrolysis and carbonization, which include tobacco stem lye and tobacco stem carbon.

[0009] Further, a method for preparing a special organic-inorganic compound fertilizer for tea leaves comprises the following steps: (1) preparing an organic fertilizer: a) tobacco stem treatment: performing alkaline hydrolysis treatment on tobacco stems, separating to obtain tobacco stem lye, and performing carbonization treatment on the residues of the tobacco stems after alkaline hydrolysis to obtain tobacco stem carbon; b) primary fermentation: mixing cow dung, pig manure, vinasse and fungus residue with fermentation agents, and performing aerobic fermentation until the materials are composted and harmless; c) secondary fermentation: adding rapeseed meal or tea seed meal to the materials after the primary fermentation, controlling the pH value of the fermentation system to be 4.5-5.5, and performing fermentation; d) tertiary fermentation: adding the tobacco stem lye and tobacco stem carbon obtained in step a) to the materials after the secondary fermentation, controlling the pH value of the fermentation system to be 7.5-8.0, and performing fermentation; e) crushing the materials obtained in step d) to a particle size of 1-2 mm, drying, and preparing the organic fertilizer; (2) crushing inorganic fertilizer raw materials through an 80-mesh sieve to obtain inorganic fertilizer powder; (3) putting the organic fertilizer prepared in step (1) and the inorganic fertilizer powder after sieving in step (2) into a mixing machine according to a proportion, fully mixing, granulating, and drying to obtain the special organic-inorganic compound fertilizer for tea leaves.

[0010] Further, in step a), the alkaline hydrolysis treatment is mixing the tobacco stems with an alkali solution with a mass fraction of 4-6% according to a solid-liquid ratio of 1:(8-12), heating and alkaline hydrolyzing at 85-95℃ for 1-3 hours, and then performing solid-liquid separation, and the obtained liquid is the tobacco stem lye.

[0011] Further, the fermentation time of the primary fermentation is 50-70 days, and the fermentation days higher than 55℃ are not less than 15 days.

[0012] Further, the fermentation time of the secondary fermentation is 15-25 days.

[0013] Further, the fermentation time of the tertiary fermentation is 8-12 days.

[0014] Further, the application of the special organic-inorganic compound fertilizer for tea leaves in tea garden fertilization.

[0015] The special organic-inorganic compound fertilizer for tea leaves provided by the application has the following beneficial effects: The present application adopts tobacco stem alkaline hydrolysis carbonization and three-stage acid-base alternating fermentation process, and through rigorous comparison test, the tea special organic-inorganic compound fertilizer provided by the present application realizes the triple synergistic effect of chemical buffer, physical structure improvement and biological activity improvement. The fertilizer can not only efficiently and durably correct soil acidification and hardening, but also can simultaneously greatly improve soil organic matter content and microbial community activity, and create a healthy root zone micro-ecological environment for tea trees. DETAILED DESCRIPTION

[0016] The technical solutions of the present application will be described clearly and completely in combination with specific embodiments of the present application. The described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0017] Embodiment one The present application provides a tea special organic-inorganic compound fertilizer. In view of the problems of soil acidification, hardening, uneven nutrients and poor applicability of existing fertilizers in Guizhou mountain tea garden, the present application is developed in combination with local advantage organic materials such as vinasse, fungus residue and tobacco stem, and includes the following raw materials by weight: inorganic fertilizer 15-25 parts, all of which are industrial grade with purity ≥98%; organic fertilizer 20-30 parts, the mass ratio of nitrogen, phosphorus and potassium elements in the inorganic fertilizer is 14-16, 2-4 and 4-6; in this embodiment, the inorganic fertilizer is preferably 20 parts, and the mass ratio of nitrogen, phosphorus and potassium elements is preferably 15:3:5; the organic fertilizer is prepared by 25 parts of the required basic raw material ratio: rapeseed meal 30-40 parts, tobacco stem 30-40 parts, cow dung 60-70 parts, pig manure 60-70 parts, vinasse 60-70 parts, fungus residue 35-45 parts, and in this embodiment, rapeseed meal 35 parts, tobacco stem 34 parts, cow dung 66 parts, pig manure 67 parts, vinasse 62 parts and fungus residue 40 parts are preferably weighed and mixed uniformly as the basic organic fertilizer raw material. In this embodiment, 20 parts of the above inorganic fertilizer and 25 parts of the prepared organic fertilizer are put into a double-shaft mixer and mixed uniformly, and then sent to a rotary drum granulator, and an appropriate amount of water is sprayed for granulation. After granulation, dry at 90℃ until the moisture content is less than 10%, and then cool and sieve to obtain the tea special organic-inorganic compound fertilizer product.

[0018] Embodiment two On the basis of the above embodiment, the present embodiment provides a method for preparing the tea special organic-inorganic compound fertilizer, which includes the following steps: (1) Preparation of organic fertilizer: a) Tobacco stem treatment: Alkaline hydrolysis, tobacco stems are mixed with 4-6% alkali solution with solid-liquid ratio of 1: (8-12), heated at 85-95℃ for 1-3 hours, then solid-liquid separation is carried out, and the obtained liquid is tobacco stem alkali liquor. Further, 34 parts by weight of tobacco stems are crushed to 2-3 cm to increase the specific surface area, and the crushed tobacco stems are placed in a reactor with 5% sodium hydroxide solution with a solid-liquid ratio of 1:10 at 90±2℃ and heated, stirred and refluxed for 2 hours. After the reaction is completed, pressure filtration is immediately carried out to realize solid-liquid separation. The collected brownish liquid is the functional tobacco stem alkali liquor, and the pH value is about 11-12.

[0019] Carbonization treatment, the tobacco stem residues after the above alkaline hydrolysis are washed with deionized water to neutralize to remove excess alkali. Then, the washed residues are carbonized at 500℃ under anaerobic conditions for 1 hour, and after cooling, tobacco stem carbon is obtained.

[0020] b) Primary fermentation: 66 parts of cow dung, 67 parts of pig manure, 62 parts of vinasse and 40 parts of fungus residue are mixed with 0.5 parts of commercial high-temperature composite fermentation agent (rich in Bacillus subtilis, Thermyscopha sp., etc., effective viable bacterial count ≥2.0×10 8 CFU / g, in accordance with the agricultural microbial fertilizer industry standard (NY / T798-2021)), and the moisture content is adjusted to 58%. The mixture is stacked and subjected to aerobic primary fermentation for 50-70 days. In this embodiment, the fermentation period is 60 days. The temperature of the stack is controlled by a pile turning machine to ensure that the fermentation temperature is ≥55℃ for ≥15 days (actually monitored for 20 days), and the stack temperature is controlled to ≤65℃ until the material is completely decomposed and harmless.

[0021] c) Secondary fermentation: after the primary fermentation is completed, 35 parts of rapeseed meal or tea seed meal are added to the material when the temperature is below 50℃, and the mixture is uniformly mixed. The pH value of the fermentation system is controlled to be 4.5-5.5, and the secondary fermentation is carried out under this condition for 15-25 days. The moisture content of the material is adjusted to be within 30%.

[0022] d) Tertiary fermentation: tobacco stem alkali liquor and tobacco stem carbon obtained in step a) are added to the material after the secondary fermentation. The pH value of the mixed fermentation system is accurately adjusted to the weak alkaline range of 7.5-8.0 by adjusting the amount of tobacco stem alkali liquor added. The tertiary fermentation is carried out under this weak alkaline condition for 8-12 days, and the moisture content of the material is adjusted to be within 30%.

[0023] e) The material obtained in step d) is crushed to 1-2 mm in size, and then dried in a drying machine at 85℃ until the moisture content is ≤25%, thereby obtaining the organic fertilizer.

[0024] (2) The inorganic fertilizer raw material is crushed to pass through an 80-mesh sieve to obtain inorganic fertilizer powder; the raw material of the inorganic fertilizer is of an industrial grade, and the purity is ≥98% (such as ammonium sulfate, monoammonium phosphate, urea, potassium sulfate, etc.).

[0025] (3) The organic fertilizer prepared in step (1) and the inorganic fertilizer powder sieved in step (2) are put into a mixer in proportion, mixed thoroughly, granulated, and the wet granules after granulation are dried at 90°C until the moisture content is less than 10% to obtain the tea special organic-inorganic compound fertilizer.

[0026] Example Three In this example, the specific regulation function of the fertilizer of the application on the tea garden soil microbial flora is quantitatively verified under the condition of strictly controlling environmental variables through a laboratory standardized soil culture test.

[0027] 1. Test materials and methods The test soil was collected from the 0-20 cm plough layer soil of a typical acidified and hardened tea garden in Guizhou Province and was mixed after passing through a 2 mm sieve. The basic pH value was 4.3.

[0028] Test design: A completely randomized block design was used, and 5 treatments were set, including 1 experimental group and 4 comparative examples.

[0029] Experimental group The complete process fertilizer prepared by the method of Example Two was applied in the experimental group.

[0030] Comparative Example One The only difference between this comparative example and the experimental group is that the same amount of tap water is used to replace the tobacco stem lye during the third fermentation.

[0031] Comparative Example Two The only difference between this comparative example and the experimental group is that the same volume and pH value (the pH value of the tobacco stem lye in Example Two is accurately matched using a pH meter) of potassium hydroxide (KOH) solution is used to replace the tobacco stem lye during the third fermentation.

[0032] Comparative Example Three The same raw materials and amounts are used in this comparative example and the experimental group, and the only difference is that the tobacco stem lye is not added during the third fermentation, but is added together with the granulation adhesive when the organic fertilizer and the inorganic fertilizer are mixed in step (3).

[0033] Comparative Example Four The same raw materials and amounts are used in this comparative example and the experimental group, and the only difference is that the tobacco stem lye is not prepared in advance, but the same amount of tobacco stem powder as in Example Two and the corresponding amount of solid sodium hydroxide required to prepare the tobacco stem lye are directly added during the third fermentation to allow in-situ alkaline hydrolysis reaction in the fermentation system.

[0034] Each treatment has 6 replicates.

[0035] Culture method: 500.0 g of equivalent dry soil was weighed into a sterile culture cup, and the equivalent nitrogen content was mixed with the fertilizer in each treatment group. The moisture content was adjusted to 60% of the maximum field water holding capacity, and incubated in a constant temperature incubator at 25±1°C for 45 days in the dark, and the weight was kept constant during the period.

[0036] Measurement method: After incubation, the number of Fusarium (PCA medium), phosphorus solubilizing bacteria (Mengjina medium) and nitrogen fixing bacteria (Asubie medium) in the soil was determined by dilution plating method, and the results were recorded as colony forming units (CFU / g) per gram of dry soil.

[0037] 2. Test results and data analysis After incubation, the absolute number of soil microorganisms in each treatment group was recorded in Table 1. In order to intuitively show the treatment effect, the change rate of the number of microorganisms in each treatment relative to the experimental group was calculated according to the data in Table 1, and recorded in Table 2.

[0038] Table 1: Soil microorganism number determination results (CFU / g dry soil, x10 4 ); Treatment group Fusarium (Mean ± SD) Phosphorus solubilizing bacteria (Mean ± SD) Nitrogen-fixing bacteria (Mean ± SD) Experimental group 12.5 ± 0.8 86.3 ± 5.9 72.8 ± 5.0 Comparative example 1 19.8 ± 1.3 71.2 ± 4.8 61.5 ± 4.1 Comparative example 2 23.1 ± 1.7 64.1 ± 4.2 58.2 ± 3.9 Comparative example 3 18.2 ± 1.2 73.5 ± 5.0 63.9 ± 4.3 Comparative example 4 17.1 ± 1.1 75.8 ± 5.2 65.1 ± 4.4 Table 1: Comparison of soil microorganism number determination results.

[0039] Table 2: Microorganism number change rate (%) = [(bacterial number of the control group-bacterial number of the experimental group) / bacterial number of the experimental group] x 100%; the result is +, indicating that the bacterial number of the control group is higher than that of the experimental group; the result is -, indicating that the bacterial number of the control group is lower than that of the experimental group.

[0040] Treatment group Fusarium (%) Phosphorus solubilizing bacteria (%) Nitrogen-fixing bacteria (%) Experimental group — — — Comparative example 1 +58.4 -17.5 -15.5 Comparative example 2 +84.8 -25.7 -20.1 Comparative example 3 +45.6 -14.8 -12.2 Comparative example 4 +36.8 -12.2 -10.6

[0041] Table 2: Comparison of microorganism number change rate.

[0042] From the above comparison results of the change rate of the number of microorganisms in the soil, after the treatment of the fertilizer (the experimental group), the absolute number of Fusarium in the soil is the lowest, and the absolute number of phosphorus-dissolving bacteria and nitrogen-fixing bacteria is the highest, the experimental group shows a significant inhibitory effect on Fusarium, and the effect is significantly better than all the comparative examples, the experimental group not only inhibits the pathogenic bacteria, but also significantly promotes the phosphorus-dissolving bacteria and nitrogen-fixing bacteria. The change rate calculated based on the original data (Table 2) shows that all the comparative examples result in an increase in pathogenic bacteria and a decrease in beneficial bacteria, and the change amplitude is much larger than the experimental error, which proves the significant difference between different treatments. The experiment provided in this embodiment is completed in a controlled environment, effectively eliminating the interference of complex factors in the field. Comparative example 2 not only increases the pathogenic bacteria, but also significantly reduces the beneficial bacteria, which proves that simple chemical alkali is destructive to the soil microecology. Comparative example 1 and comparative example 3 have a slight promoting effect on beneficial bacteria, which is far inferior to the experimental group. Comparative example 4 directly uses the method of adding tobacco stem powder and alkali for in-situ reaction, and the effect is slightly better than that of comparative example 1 and comparative example 3, but it is far inferior to the experimental group. Therefore, simple raw material addition in the fermentation system cannot replace the key step of pre-controlled alkaline hydrolysis, and the complexity and non-uniformity of the fermentation environment cannot provide stable, sufficient and efficient alkaline hydrolysis reaction conditions as in step a) of embodiment 2, so as to generate sufficient and structure-specific functional active substances.

[0043] Example Four This embodiment directly verifies the significant effect of the fertilizer of the application on improving tea yield and quality and increasing economic benefits through field tests conducted by the inventors.

[0044] 1. Test materials and methods Test site and variety: The test was conducted in three tea gardens with acidic or hardened characteristics in Meitan County, Yuqing County and Zhijin County of Guizhou Province. The data and results in this embodiment are taken as an example to demonstrate the test point in Meitan County (the tested variety is "Qianmei 601").

[0045] Test design, three treatments were set: Experimental group: the tea special organic-inorganic compound fertilizer prepared by the method of embodiment one and embodiment two of the application was applied.

[0046] Control group: a certain brand of general organic-inorganic compound fertilizer (total nutrient of nitrogen, phosphorus and potassium is equal to that of the experimental group) was applied.

[0047] Conventional group: the local conventional fertilization scheme (simple mixing of urea, superphosphate and potassium sulfate) was applied.

[0048] Three repetitions were set for each treatment, and the completely randomized block arrangement was used.

[0049] Fertilization management: all treatments were fertilized with equal nitrogen, and were applied by trenching before the spring tea sprouted, and other field management measures were consistent.

[0050] Test index and method Yield index: at the spring tea harvesting period, the total weight of fresh leaves in each plot was recorded, and the yield per mu was calculated. The hundred bud weight (randomly taking 100 one-bud-one-leaf and weighing) was measured.

[0051] Quality index: one-bud-two-leaf fresh leaf samples of each treatment were collected, and after being processed into dry tea by the same process, the tea polyphenol and amino acid contents were analyzed.

[0052] Economic benefit: according to the local fresh leaf purchase price of the year, the yield per mu was calculated.

[0053] The economic effect comparison results are shown in Table 3. Detection index Experimental group Control group Conventional group Yield per mu (kg) 306.5±8.2 275.0±7.5 266.8±6.9 Hundred seed weight (g) 14.19±1.5 13.97±1.3 12.42±1.2 Tea polyphenol (%) 17.93±0.5 17.83±0.6 17.65±0.5 Amino acid (%) 3.93±0.08 3.45±0.07 3.40±0.06 Table 3: Comparison table of tea yield and quality.

[0054] It can be known from the strict control of the example that the yield per mu of tea in the experimental group is significantly higher than that in the control group and the conventional group, and the yield increase rates are 11.5% and 14.9% respectively, which fully proves that the fertilizer has a significant yield increase advantage in the actual application in the field; the yield per mu of the control group is 3.1% higher than that of the conventional group, and the hundred bud weight of the experimental group is also better than that of the control group and the conventional group, which comprehensively verifies that by improving the soil micro-ecology, the fertilizer can effectively promote the vegetative growth of tea trees, improve the germination density and hundred bud weight. The tea polyphenol and amino acid contents of the tea produced in the experimental group are significantly higher than those in the control group and the conventional group, which further proves that the fertilizer can optimize the nutrient supply of tea trees, and the tea polyphenol and amino acid contents are the core substances that determine the taste of tea, and the improvement of the contents means that the taste, aroma and freshness of tea are better, and the market price is usually higher. The yield and quality are improved, the fertilizer can bring significant additional economic benefits to tea farmers, and fully embodies its market application value and popularization potential.

[0055] In summary, the tea special organic-inorganic compound fertilizer and the preparation method thereof provided by the present application adopt the synergistic effect of alkali hydrolysis carbonization of tobacco stems and three-stage acid-alkali alternating fermentation process, and through strict comparison tests, it is proved that the tea special organic-inorganic compound fertilizer provided by the present application realizes the triple synergistic effect of chemical buffering, physical structure improvement and biological activity improvement. Through the synergistic improvement effect of the three-in-one, it is suitable for improving the acidified and hardened tea garden soil, and can improve the fertilizer utilization rate, and provides an effective solution for realizing the quality improvement and yield increase of tea.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A special organic-inorganic compound fertilizer for tea leaves, characterized in that: The organic fertilizer is prepared from the following raw materials by weight: 30-40 parts of rapeseed meal, 30-40 parts of tobacco stems, 60-70 parts of cow dung, 60-70 parts of pig dung, 60-70 parts of vinasse, and 35-45 parts of mushroom residue. ​ The organic fertilizer is prepared from the following raw materials by weight: 30-40 parts of rapeseed meal, 30-40 parts of tobacco stems, 60-70 parts of cow dung, 60-70 parts of pig dung, 60-70 parts of vinasse, and 35-45 parts of mushroom residue.

2. The tea special organic-inorganic compound fertilizer according to claim 1, characterized in that: The mass ratio of nitrogen, phosphorus and potassium in the inorganic fertilizer is 15:3:

5.

3. The tea special organic-inorganic compound fertilizer according to claim 1, characterized in that: The organic fertilizer contains a tobacco stem component treated by alkaline hydrolysis and carbonization, which includes tobacco stem lye and tobacco stem carbon.

4. A method for preparing the organic-inorganic compound fertilizer for tea leaves according to any one of claims 1 to 3, characterized in that, The method comprises the following steps: (1) preparing the organic fertilizer: a) tobacco stem treatment: the tobacco stems are subjected to alkaline hydrolysis treatment, and the tobacco stem lye is separated. The residual tobacco stems after alkaline hydrolysis are subjected to carbonization treatment to obtain tobacco stem carbon; b) primary fermentation: the cow dung, pig dung, vinasse and mushroom residue are mixed with fermentation agents, and subjected to aerobic fermentation until the materials are fully decomposed and harmless; c) secondary fermentation: rapeseed meal or tea seed meal is added to the materials after the primary fermentation, and the pH value of the fermentation system is controlled to be 4.5-5.5 for fermentation; d) tertiary fermentation: the tobacco stem lye and tobacco stem carbon obtained in step a) are added to the materials after the secondary fermentation, and the pH value of the fermentation system is controlled to be 7.5-8.0 for fermentation; e) the materials obtained in step d) are crushed to a particle size of 1-2 mm, dried, and the organic fertilizer is prepared; (2) the inorganic fertilizer raw materials are crushed to pass through an 80-mesh sieve to obtain inorganic fertilizer powder; (3) the organic fertilizer prepared in step (1) and the inorganic fertilizer powder after sieving in step (2) are proportionally fed into a mixer, fully mixed, granulated, and dried to obtain the tea-specific organic-inorganic compound fertilizer.

5. The method of claim 4, wherein: In step a), the tobacco stems are mixed with an alkali solution with a mass fraction of 4-6% at a solid-liquid ratio of 1:(8-12), heated for alkaline hydrolysis at 85-95°C for 1-3 hours, and then subjected to solid-liquid separation. The obtained liquid is the tobacco stem lye.

6. The method of claim 4, wherein: The fermentation time of the primary fermentation is 50-70 days, and the fermentation days at a temperature higher than 55°C are not less than 15 days.

7. The method of claim 4, wherein: The fermentation time of the secondary fermentation is 15-25 days.

8. The method of claim 4, wherein: The fermentation time of the tertiary fermentation is 8-12 days.

9. The tea-specific organic-inorganic compound fertilizer according to any one of claims 1-3 for use in tea plantation fertilization.