Preparation method of special improved saline-alkali soil fertilizer rich in cockroach powder

Abstract

The application discloses a preparation method of a special improved saline-alkali soil fertilizer rich in cockroach powder, and comprises the following steps: fermenting and enzymatically hydrolyzing artificially bred high-immunity cockroaches mixed with a binder to prepare fermented mixed material 1; fermenting and enzymatically hydrolyzing fish and shrimp waste homogenate to prepare fermented mixed material 2; mixing and granulating the fermented mixed material 1, the fermented mixed material 2, urea, potassium fulvate, crushed straw and biochar particles, and obtaining the special improved saline-alkali soil fertilizer through drying and screening. The high-immunity cockroaches are mixed with the binder, crushed, and then added with a hydrolytic enzyme for enzymatic hydrolysis, so that the high-immunity cockroach powder can be obtained through the synergistic effect of the bacteria and the enzyme. The fertilizer can effectively increase the content of organic matter in soil, reduce the salt content of soil, improve the saline-alkali soil, and promote the growth of crops, and can be used as the special fertilizer for improving the saline-alkali soil.

Description

Technical Field

[0001] This invention belongs to the field of soil improvement, specifically relating to a method for preparing a special fertilizer for improving saline-alkali land that is rich in cockroach powder. Background Technology

[0002] Currently, saline-alkali land mainly includes inland saline-alkali land and coastal saline-alkali land. Saline-alkali soil is a general term for both saline and alkaline soils, primarily containing soluble salts such as potassium, sodium, and magnesium chlorides, sulfates, carbonates, and bicarbonates. Soil salinization is a global problem, and how to improve saline-alkali land into arable land is a hot topic of global concern and research. Current improvement methods include physical methods, chemical methods, and biological methods.

[0003] Physical methods primarily aim to improve saline-alkali soil by altering its physicochemical properties through external forces. Studies have shown that drip irrigation can effectively inhibit soil salinization and enhance microbial activity. Shao Jianrong et al. suggested using this measure to control soil salinization, primarily by reducing the amount of sodium (Na) in irrigation water. + Content, and will control the total salt content of irrigation water and reduce Na + Both proportions must be considered simultaneously to reduce salinity and prevent persistent soil salinization. Furthermore, timely deep plowing and harrowing can disrupt soil capillaries, prevent salt reversion, increase soil porosity, improve water retention capacity, and accelerate salt leaching. Chemical amendment methods utilize chemical amendments, through ion exchange and other processes, to rapidly regulate soil pH and salinity. Common amendments include gypsum, aluminum sulfate, polyacrylamide, and others. Biological amendments involve planting salt- and alkali-tolerant plants on saline-alkali land. Under irrigation and natural rainfall conditions, without the addition of any amendments, the plants' own growth, nutrient absorption, and root influence on soil properties lead to salt migration and improve saline-alkali soil. Clover, Cynodon dactylon, Acerola, and Kochia have shown good results in this area.

[0004] Currently, there are no reports or applications of fertilizers for improving saline-alkali land. Summary of the Invention

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0006] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0007] Therefore, the purpose of this invention is to overcome the shortcomings of the prior art and provide a method for preparing a special improved saline-alkali land fertilizer rich in cockroach powder.

[0008] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a method for preparing a special fertilizer for improving saline-alkali land rich in cockroach powder, comprising,

[0009] Adding polysaccharides and probiotics to the water in which cockroaches are artificially raised can regulate the cockroach's gut flora and immune-active substances, thereby obtaining adult cockroaches with high immunity.

[0010] After thoroughly mixing the adhesive and adult cockroaches, mixture 1 is obtained;

[0011] The mixture 1 is air-dried and crushed, then probiotics are added for fermentation. Hydrolytic enzymes are added to the fermented material to hydrolyze it, thus obtaining fermented mixture 1.

[0012] Fish and shrimp waste is homogenized, deodorized, and then fermented with lactic acid bacteria. Hydrolytic enzymes are added to the resulting lactic acid bacteria fermentation product for enzymatic hydrolysis to obtain fermentation mixture 2.

[0013] After mixing fermentation mixture 1 and fermentation mixture 2, urea, potassium humate, crushed straw, and biochar granules are added, mixed and granulated, and then dried and sieved to obtain a special fertilizer for improving saline-alkali land.

[0014] In a preferred embodiment of the preparation method described in this invention, polysaccharides and probiotics are added to the living water used for artificially raising cockroaches. The polysaccharides include β-glucan powder, and the probiotics include Bacillus subtilis. The mass ratio of the living water used for artificially raising cockroaches, polysaccharides, and probiotics is 10-20:0.5-5:2-10.

[0015] As a preferred embodiment of the preparation method described in this invention, the step involves regulating the bacterial flora and immune-active substances in cockroaches, wherein the rearing period is 100–120 days and the rearing temperature is 20–30°C.

[0016] In a preferred embodiment of the preparation method described in this invention, the mixture 1 contains a binder comprising pregelatinized starch, and the mass ratio of the binder to adult cockroaches is 20-30:100-110.

[0017] As a preferred embodiment of the preparation method of the present invention, wherein: the addition of probiotics for fermentation involves adding hydrolytic enzymes to the fermented material to obtain fermented mixture 1;

[0018] Among them, probiotics include Bifidobacterium bifidum, and hydrolytic enzymes include amylase and protease;

[0019] The amount of probiotics added is 2-4%, and the amount of hydrolytic enzymes added is 0.4-0.6%.

[0020] The fermentation time is 7 to 21 days, the fermentation temperature is 60 to 75℃, and the fermentation method is aerobic fermentation;

[0021] The enzymatic hydrolysis temperature is 30–50℃, and the enzymatic hydrolysis time is 90–120 min.

[0022] In a preferred embodiment of the preparation method described in this invention, the fish and shrimp waste is homogenized, wherein the mass ratio of the fish and shrimp waste is 1:1.

[0023] In a preferred embodiment of the preparation method described in this invention, the addition of lactic acid bacteria for fermentation involves adding a hydrolytic enzyme to the obtained lactic acid bacteria fermentation product for enzymatic hydrolysis, resulting in a fermentation mixture 2; wherein...

[0024] The lactic acid bacteria include Lactobacillus acidophilus, and the hydrolytic enzymes include amylase and protease;

[0025] The amount of lactic acid bacteria added is 2-4%, and the amount of hydrolytic enzyme added is 0.2-0.5%.

[0026] The fermentation time is 7 to 21 days, the fermentation temperature is 60 to 75℃, and the fermentation method is aerobic fermentation;

[0027] The enzymatic hydrolysis temperature is 30–50℃, and the enzymatic hydrolysis time is 90–120 min.

[0028] In a preferred embodiment of the preparation method described in this invention, the particle size of the crushed straw is 1.0 to 4.5 cm, and the straw is one or more of corn straw, wheat straw, cotton straw, and legume straw.

[0029] In a preferred embodiment of the preparation method of the present invention, the following components are provided: fermentation mixture 1 comprises 26-31 parts, fermentation mixture 2 comprises 18-28 parts, urea comprises 20-30 parts, potassium humate comprises 32-40 parts, crushed straw comprises 3-8 parts, and biochar granules comprises 7-12 parts.

[0030] Another objective of this invention is to overcome the shortcomings of the prior art and provide a special fertilizer for improving saline-alkali land that is rich in cockroach powder, wherein the moisture content of the special fertilizer for improving saline-alkali land rich in cockroach powder is 10-35%.

[0031] Beneficial effects of this invention:

[0032] (1) This invention provides a special fertilizer for improving saline-alkali land rich in cockroach powder. In the preparation process, probiotics and polysaccharides are added to the living water of artificially raised cockroaches to obtain cockroaches with high immunity. Then, binder is added, mixed and crushed, and then bacteria and enzymes are synergistically processed to obtain cockroach powder with high immunity. After mixing with fish and shrimp waste, urea, potassium humate, crushed straw and biochar particles are added and fully mixed. After drying, sieving and packaging, a new type of fertilizer for improving saline-alkali land is obtained, which can effectively reduce the total salt content of the topsoil in the test area.

[0033] (2) The natural raw materials used in the preparation process of this invention, such as cockroaches, crushed straw, and biochar granules, are all low in cost and widely available, with significant cost advantages. Moreover, the formula is reasonable and nutritionally rich and balanced. Cockroach powder has detoxification effects, but it is a blank area in the field of fertilizer. After biological fermentation, cockroaches will produce animal enzymes that are beneficial to improving saline-alkali land. The products contain a variety of probiotics and metabolites, such as antimicrobial peptides, probiotics, and biostimulants. While providing nutrients for plant growth, it can also improve their salt and alkali resistance. It can be used as a special fertilizer for improving saline-alkali land and promoting crop growth. As an improvement material, biochar granules can adsorb a large amount of salt, slow down the upward movement of salt, and reduce the accumulation of salt on the soil surface, effectively reducing the total salt content of the soil surface in the experimental area. Furthermore, the preparation process of this invention is simple and the equipment is highly reliable. Detailed Implementation

[0034] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the examples in the specification.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0037] Raw material sources in the embodiments of this invention:

[0038] Cockroaches were collected from Dagang Street, Binhai New Area, Tianjin. The water used for raising cockroaches was tap water. β-glucan was purchased from Tianjin Tianlong Jiangda Biotechnology Co., Ltd. Bacillus subtilis (CMCC 63501), Bifidobacterium bifidum (ATCC29521), and Lactobacillus acidophilus (ATCC 4356) were all purchased from Beijing Bio-Tech Biotechnology Co., Ltd. The binder was purchased from Henan Baixing Biotechnology Co., Ltd. Amylase was purchased from Hangzhou Ketian Biotechnology Co., Ltd., with an enzyme activity of 10,000 U / g. Protease was purchased from Jinan Yuncheng Biotechnology Co., Ltd., with an enzyme activity of 100,000 U / g. Fish and shrimp waste was collected from Beitang Street, Binhai New Area, Tianjin. Straw was collected from Dagang Street, Binhai New Area, Tianjin. Urea was purchased from Shandong Baihua Chemical Co., Ltd. Potassium humate was purchased from Jinan Shengshi Chuangfu Chemical Co., Ltd. Biochar granules were purchased from Weishi Changsheng Biochar Co., Ltd.

[0039] Example 1

[0040] (1) Obtaining cockroaches with high immunity:

[0041] Add 0.5 parts β-glucan powder and 2 parts Bacillus subtilis to the living water of 14 artificially raised cockroaches. The cockroaches were raised for 105 days at a temperature of 25°C. By regulating the bacterial flora and immune-active substances in the cockroaches, cockroaches with high immunity were obtained.

[0042] (2) Preparation of cockroach powder with high immunity:

[0043] After thoroughly mixing 20 parts of adhesive and 105 parts of adult cockroaches to obtain mixture 1, the mixture was air-dried. The air-dried mixture 1 was then pulverized in a grinder to a fine powder. 2% Bifidobacterium was added for fermentation for 7 days at 60℃ using aerobic fermentation. 0.5% amylase and protease were added to the fermentation mixture for enzymatic hydrolysis at 30℃ for 90 minutes, yielding fermentation mixture 2. Fish and shrimp waste was homogenized, deodorized, and then 2% Lactobacillus acidophilus was added for fermentation for 10 days at 65℃ using aerobic fermentation. 0.5% amylase and protease were added to the fermentation mixture for enzymatic hydrolysis at 35℃ for 100 minutes, yielding fermentation mixture 2.

[0044] (3) Preparation of new fertilizers:

[0045] After mixing 26 parts of fermentation mixture 1 and 19 parts of fermentation mixture 2, 22 parts of urea, 35 parts of potassium humate, 8 parts of crushed straw, and 12 parts of biochar granules are added and thoroughly mixed. The mixture is then granulated, dried, sieved, and packaged to obtain a new type of fertilizer for improving saline-alkali land.

[0046] Example 2

[0047] (1) Obtaining cockroaches with high immunity:

[0048] Add 2.5 parts β-glucan powder and 5 parts Bacillus subtilis to the living water of 20 artificially raised cockroaches. The cockroaches were raised for 110 days at a temperature of 20°C. By regulating the bacterial flora and immune-active substances in the cockroaches, cockroaches with high immunity were obtained.

[0049] (2) Preparation of cockroach powder with high immunity:

[0050] After thoroughly mixing 25 parts of adhesive and 110 parts of adult cockroaches to obtain mixture 1, the mixture was air-dried. The air-dried mixture 1 was then placed in a grinder and ground to a fine powder. 3% Bifidobacterium was added for fermentation for 15 days at 65℃ using aerobic fermentation. 0.4% amylase and protease were then added to the fermentation mixture for enzymatic hydrolysis at 37℃ for 100 minutes, yielding fermentation mixture 1.

[0051] Fish and shrimp waste was homogenized, deodorized, and then fermented with 3% Lactobacillus acidophilus for 20 days at 75℃ using aerobic fermentation. 0.2% amylase and protease were added to the fermentation mixture for enzymatic hydrolysis at 45℃ for 90 minutes, yielding fermentation mixture 2.

[0052] (3) Preparation of new fertilizers:

[0053] Mix 28 parts of fermentation mixture 1 and 28 parts of fermentation mixture 2 evenly, add 30 parts of urea, 32 parts of potassium humate, 3 parts of crushed straw and 7 parts of biochar granules, mix thoroughly and then granulate. After drying, screening and packaging, a new type of fertilizer for improving saline-alkali land is obtained.

[0054] Example 3

[0055] (1) Obtaining cockroaches with high immunity:

[0056] Add 5 parts β-glucan powder and 9 parts Bacillus subtilis to 10 parts of the living water of artificially raised cockroaches. The cockroaches are raised for 120 days at a temperature of 30°C. By regulating the bacterial flora and immune-active substances in the cockroaches, cockroaches with high immunity can be obtained.

[0057] (2) Preparation of cockroach powder with high immunity:

[0058] After thoroughly mixing 30 parts of adhesive and 100 parts of adult cockroaches, we obtained mixture 1. The mixture was then air-dried. The air-dried mixture 1 was then placed in a grinder and ground into fine particles. 4% of Bifidobacterium bifidum was then added for fermentation. The fermentation time was 21 days, the fermentation temperature was 75℃, and the fermentation method was aerobic fermentation.

[0059] 0.6% amylase and protease were added to the fermentation mixture for enzymatic hydrolysis at a temperature of 45℃ for 110 min to obtain fermentation mixture 1.

[0060] Fish and shrimp waste was homogenized, deodorized, and then fermented with 4% Lactobacillus acidophilus for 15 days at 60℃ using aerobic fermentation. 0.3% amylase and protease were added to the fermentation mixture for enzymatic hydrolysis at 50℃ for 110 minutes, resulting in fermentation mixture 2.

[0061] (3) Preparation of new fertilizers:

[0062] Mix 31 parts of fermentation mixture 1 and 25 parts of fermentation mixture 2 evenly, add 25 parts of urea, 40 parts of potassium humate, 6 parts of crushed straw and 9 parts of biochar granules, mix thoroughly and then granulate. After drying, screening and packaging, a new type of fertilizer for improving saline-alkali land is obtained.

[0063] Comparative Example 1

[0064] (1) Obtaining cockroaches with high immunity:

[0065] Add 0.5 parts β-glucan powder and 2 parts Bacillus subtilis to the living water of 14 artificially raised cockroaches. The cockroaches were raised for 105 days at a temperature of 25°C. By regulating the bacterial flora and immune-active substances in the cockroaches, cockroaches with high immunity were obtained.

[0066] (2) Preparation of cockroach powder with high immunity:

[0067] After thoroughly mixing 20 parts of adhesive and 105 parts of adult cockroaches to obtain mixture 1, the mixture was air-dried. The air-dried mixture 1 was then placed in a grinder and ground to a fine powder. 2% Bifidobacterium was added for fermentation for 7 days at 60℃ using aerobic fermentation. 0.5% amylase and protease were then added to the fermentation mixture for enzymatic hydrolysis at 30℃ for 90 minutes, yielding fermentation mixture 1.

[0068] (3) Preparation of new fertilizers:

[0069] 45 parts of fermented mixture 1 were thoroughly mixed with 22 parts of urea, 35 parts of potassium humate, 8 parts of crushed straw, and 12 parts of biochar granules, then granulated, dried, sieved, and packaged to obtain a new type of fertilizer for improving saline-alkali land.

[0070] Comparative Example 2

[0071] (1) Obtaining cockroaches with high immunity:

[0072] Add 2.5 parts β-glucan powder and 5 parts Bacillus subtilis to the living water of 20 artificially raised cockroaches. The cockroaches were raised for 110 days at a temperature of 20°C. By regulating the bacterial flora and immune-active substances in the cockroaches, cockroaches with high immunity were obtained.

[0073] (2) Preparation of cockroach powder with high immunity:

[0074] After thoroughly mixing 25 parts of adhesive and 110 parts of adult cockroaches, mixture 1 was obtained. The mixture was then air-dried and placed in a grinder to be ground into fine particles. 3% Bifidobacterium was then added for fermentation. The fermentation time was 15 days, the fermentation temperature was 65℃, and the fermentation method was aerobic fermentation, resulting in fermented mixture 1.

[0075] Fish and shrimp waste was homogenized, deodorized, and then fermented with 3% Lactobacillus acidophilus for 20 days at 75℃ using aerobic fermentation. 0.2% amylase and protease were added to the fermentation mixture for enzymatic hydrolysis at 45℃ for 90 minutes, yielding fermentation mixture 2.

[0076] (3) Preparation of new fertilizers:

[0077] Mix 28 parts of fermentation mixture 1 and 28 parts of fermentation mixture 2 evenly, add 30 parts of urea, 32 parts of potassium humate, 3 parts of crushed straw and 7 parts of biochar granules, mix thoroughly and then granulate. After drying, screening and packaging, a new type of fertilizer for improving saline-alkali land is obtained.

[0078] Comparative Example 3

[0079] (1) Obtaining cockroaches with high immunity:

[0080] Add 5 parts β-glucan powder and 9 parts Bacillus subtilis to 10 parts of the living water of artificially raised cockroaches. The cockroaches are raised for 120 days at a temperature of 30°C. By regulating the bacterial flora and immune-active substances in the cockroaches, cockroaches with high immunity can be obtained.

[0081] (2) Preparation of cockroach powder with high immunity:

[0082] After thoroughly mixing 30 parts of adhesive and 100 parts of adult cockroaches, we obtained mixture 1. The mixture was then air-dried. The air-dried mixture 1 was then placed in a grinder and ground into fine particles. 4% of Bifidobacterium bifidum was then added for fermentation. The fermentation time was 21 days, the fermentation temperature was 75℃, and the fermentation method was aerobic fermentation.

[0083] 0.6% amylase and protease were added to the fermentation mixture for enzymatic hydrolysis at a temperature of 45℃ for 110 min to obtain fermentation mixture 1.

[0084] Fish and shrimp waste was homogenized, deodorized, and then 4% Lactobacillus acidophilus was added for fermentation. The fermentation time was 15 days, the fermentation temperature was 60℃, and the fermentation method was aerobic fermentation. The resulting fermented mixture was material 2.

[0085] (3) Preparation of new fertilizers:

[0086] Mix 31 parts of fermentation mixture 1 and 25 parts of fermentation mixture 2 evenly, add 25 parts of urea, 40 parts of potassium humate, 6 parts of crushed straw and 9 parts of biochar granules, mix thoroughly and then granulate. After drying, screening and packaging, a new type of fertilizer for improving saline-alkali land is obtained.

[0087] Application Experiment:

[0088] The experiment was conducted at the winter wheat planting base of the Coastal Farm in Huanghua City, Cangzhou, Hebei Province. The soil there is saline-alkali soil. The soil test results are as follows: organic matter content 13.32 g / kg, available nitrogen content 26.52 mg / kg, available phosphorus content 31.39 mg / kg, available potassium content 92.35 mg / kg, soil salinity 3.43 g / kg, and pH 8.5.

[0089] Using the aforementioned saline-alkali land as the target for improvement, the experimental plots were divided into 7 equal parts. Six of these parts served as experimental group 1, experimental group 2, experimental group 3, control group 1, control group 2, and control group 3, respectively, and were treated with 20 kg of the novel fertilizer for improving saline-alkali land prepared in Examples 1, 2, and 3. One part served as the blank control group.

[0090] Twenty days after the application of the new fertilizer, during the jointing and booting stage of winter wheat, the soil organic matter, available potassium, available phosphorus, alkaline nitrogen, soil salinity, pH value, wheat ear length, number of grains per ear, and number of wheat seedlings were measured. The physical indicators of different treatment groups are shown in Table 1.

[0091] Table 1 Comparison of physical indicators of different treatment groups

[0092]

[0093]

[0094] As shown in the table above, the soil organic matter, available nitrogen, available phosphorus, and available potassium contents in experimental group 1 were all higher than those in control group 1, while the soil salinity and pH value were lower than those in control group 1. The wheat ear length, number of grains per ear, and number of seedlings in experimental group 1 were all higher than those in control group 1. This indicates that the addition of fermented mixture 2 can increase the soil organic matter, available nitrogen, available phosphorus, and available potassium contents, reduce the soil salinity and pH value, and increase the wheat ear length, number of grains per ear, and number of seedlings in experimental group 1.

[0095] The soil organic matter, available nitrogen, available phosphorus, and available potassium contents in experimental group 2 were all higher than those in control group 2, while the soil salinity and pH value were lower. The wheat ear length, number of grains per ear, and number of seedlings in experimental group 2 were all higher than those in control group 2. This indicates that adding enzymatic hydrolysis process when preparing fermented mixture 1 can increase the soil organic matter, available nitrogen, available phosphorus, and available potassium contents, reduce the soil salinity and pH value, and increase the wheat ear length, number of grains per ear, and number of seedlings.

[0096] The soil organic matter, available nitrogen, available phosphorus, and available potassium contents in experimental group 3 were all higher than those in control group 3, while the soil salinity and pH value were lower than those in control group 3. The wheat ear length, number of grains per ear, and number of seedlings in experimental group 3 were all higher than those in control group 3. This indicates that adding enzymatic hydrolysis process when preparing fermented mixture 2 can increase the soil organic matter, available nitrogen, available phosphorus, and available potassium contents, reduce soil salinity and pH value, and increase the wheat ear length, number of grains per ear, and number of seedlings in experimental group 3.

[0097] As can be seen from the above embodiments, the present invention combines various effective ingredients with cockroach powder, which can not only improve saline-alkali soil, but also maximize the utilization rate of fertilizer, thereby promoting crop growth. It can effectively increase the content of organic matter, alkaline nitrogen, available phosphorus and available potassium in the soil, reduce the soil salinity, change the pH value from alkaline to slightly acidic, and promote the growth of winter wheat.

[0098] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the present invention.

Claims

1. A method for preparing a special fertilizer for improving saline-alkali land rich in cockroach powder, characterized in that: Comprising, In the artificial feeding cockroach living water, polysaccharide, probiotics are added, the bacterial flora and the immune active substance in the cockroach body are adjusted, and the cockroach adult with high immunity is obtained, wherein the probiotics are Bacillus subtilis; The binder and the cockroach adult are fully stirred to obtain mixture 1; The mixture 1 is air-dried and crushed, and then fermented by adding probiotics, and then hydrolytic enzyme is added to the fermented product for enzymolysis to obtain fermented mixture 1, wherein the probiotics are Bifidobacterium, and the hydrolytic enzyme is amylase and protease; The fish and shrimp waste is homogenized, deodorized, fermented by adding lactic acid bacteria, and then hydrolytic enzyme is added to the prepared lactic acid bacteria fermentation product for enzymolysis to obtain fermented mixture 2, wherein the lactic acid bacteria are Lactobacillus acidophilus, and the hydrolytic enzyme is amylase and protease; The fermented mixture 1 and the fermented mixture 2 are uniformly mixed, then urea, potassium fulvate, crushed straw and biochar particles are added for granulation, and then the special fertilizer for improving saline-alkali soil is obtained by drying and screening.

2. The production method according to claim 1, characterized by: The polysaccharide includes β-glucan powder, and the mass ratio of the artificial feeding cockroach living water, the polysaccharide and the probiotics is 10-20:0.5-5:2-10.

3. The production method according to claim 1 or 2, characterized by: The feeding time is 100-120 days, and the feeding temperature is 20-30 DEG C.

4. The production method according to claim 1, wherein: The binder includes pregelatinized starch, and the mass ratio of the binder and the cockroach adult is 20-30:100-110.

5. The production method according to claim 1, wherein: The fermented mixture 1 is obtained by adding probiotics for fermentation and adding hydrolytic enzyme to the fermented product for enzymolysis; The addition amount of the probiotics is 2-4%, and the addition amount of the hydrolytic enzyme is 0.4-0.6%; The fermentation time is 7-21 days, the fermentation temperature is 60-75 DEG C, and the fermentation mode is aerobic fermentation; The enzymolysis temperature is 30-50 DEG C, and the enzymolysis time is 90-120 min.

6. The production method according to claim 1, wherein: The fish and shrimp waste is homogenized, deodorized, fermented by adding lactic acid bacteria, and then hydrolytic enzyme is added to the prepared lactic acid bacteria fermentation product for enzymolysis to obtain fermented mixture 2, wherein the lactic acid bacteria are Lactobacillus acidophilus, and the hydrolytic enzyme is amylase and protease; 7. The production method according to claim 1 or 6, characterized by: The addition amount of the lactic acid bacteria is 2-4%, and the addition amount of the hydrolytic enzyme is 0.2-0.5%; The fermentation time is 7-21 days, the fermentation temperature is 60-75 DEG C, and the fermentation mode is aerobic fermentation; The enzymolysis temperature is 30-50 DEG C, and the enzymolysis time is 90-120 min. The particle size of the crushed straw is 1.0-4.5 cm, and the straw is one or more of corn straw, wheat straw, cotton straw and legume crop straw.

8. The production method according to claim 1, wherein: In terms of raw material mass fraction, the fermented mixture 1 is 26-31 parts, the fermented mixture 2 is 18-28 parts, the urea is 20-30 parts, the potassium fulvate is 32-40 parts, the crushed straw is 3-8 parts, and the biochar particles are 7-12 parts.

9. The production method according to claim 1, wherein: The special fertilizer for improving saline-alkali soil rich in cockroach powder has a water content of 10-35%.

10. The fertilizer for special improved saline-alkaline land rich in cockroach powder prepared by the method of any one of claims 1 to 9, characterized in that: ​

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