A fertilizer synergist and its preparation method and application

Abstract

The present invention discloses a fertilizer synergist and a preparation method and application thereof, and belongs to the field of fertilizer technology. The fertilizer synergist comprises sodium glutamate, DA-6 and an additive, wherein the additive is a mixture of γ-polyglutamic acid, sodium humate, seaweed extract and banana peel extract. The fertilizer synergist in the present invention is relatively simple in composition, and the components interact with each other, which can provide suitable growth conditions for crops, and can enhance the physiological activity of crops, thereby improving the utilization efficiency of fertilizers by crops. The present invention introduces additives into the fertilizer synergist, and the additives can not only enhance the efficacy of sodium glutamate and DA-6, but also play the role of avoiding nutrient loss, improving soil environment, enhancing crop resistance, etc., and can be used in combination with fertilizers to effectively improve the utilization rate of fertilizers. The fertilizer synergist in the present invention can effectively improve the absorption and utilization of fertilizers by crops, especially rice, and has a positive effect on increasing crop yields.

Description

Technical Field

[0001] The invention belongs to the technical field of fertilizers, and in particular relates to a fertilizer synergist and a preparation method and application thereof. Background Art

[0002] Fertilizer enhancers, as active substances, can increase the absorption of nutrients by crops by fixing nitrogen and activating the potassium and phosphorus elements that are difficult to utilize in the soil. At the same time, they can play a certain regulatory role in the growth of crops. They are usually added to conventional fertilizers, which can appropriately reduce the amount of fertilizer applied and improve the utilization rate of fertilizers.

[0003] Polyglutamic acid fertilizer enhancer is a glutamic acid polymer prepared by biological fermentation technology. It has a large molecular weight and a comb-like structure due to the large number of carboxyl groups on the side chain. It can have chelation, moisturizing and plant growth regulation effects. Although polyglutamic acid has excellent properties, it is sensitive to physical, chemical and biological conditions, especially microorganisms are the main factor in its degradation. As a fertilizer enhancer, its rapid degradation in the soil affects the long-term performance of its function. It has relatively weak fertilizer retention ability and insufficient slow release, which makes it limited in extending the fertilizer nutrient release period, resulting in relatively low fertilizer utilization.

[0004] Therefore, developing a new fertilizer enhancer to improve fertilizer utilization and save fertilizer input costs is of great significance to my country's agricultural development and ecological environment protection. Summary of the invention

[0005] In view of the above-mentioned prior art, the present invention provides a fertilizer synergist and a preparation method and application thereof, so as to solve the technical problem that the existing fertilizer synergist has poor synergistic effect.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is to provide a fertilizer synergist, comprising the following components in parts by weight:

[0007] 10 parts of sodium glutamate, 10 parts of DA-6 and 2.5-5 parts of additives; the additives are prepared by mixing γ-polyglutamic acid, sodium humate, seaweed extract and banana peel extract in a mass ratio of 5-10:1-3:1-3:3-5; the banana peel extract is prepared by the following steps:

[0008] S1: Take a fully ripe banana, peel it, and mash the banana peel into a paste to obtain a base material;

[0009] S2: adding mixed enzymes to the base material, mixing well and performing enzymolysis at room temperature for 4 to 8 hours to obtain enzymolysis material; the mixed enzymes include cellulase and pectinase;

[0010] S3: drying the enzymatic hydrolyzate at 50-70°C until the water content is less than 5%, and then crushing it into particles with a particle size of 100-200 mesh to obtain pellets;

[0011] S4: Using ethanol as the extraction solvent, the pellets were subjected to Soxhlet extraction for 6 to 8 hours;

[0012] S5: Concentrate the extract until the volume no longer changes, and then dry it at 50-70°C to constant weight.

[0013] The beneficial effects of the above technical scheme adopted by the present invention are as follows: the fertilizer synergist in the present invention is mainly composed of sodium glutamate and DA-6, wherein sodium glutamate is rich in nitrogen, which can provide nitrogen nutrition for crops and meet the demand for nitrogen in the process of crop growth, and sodium glutamate can stimulate the root growth of crops, making the root system more developed, and the developed root system can more effectively absorb the nutrients in the fertilizer, thereby improving the fertilizer efficiency; in addition, sodium glutamate can improve the soil environment and balance the soil pH, and the appropriate pH can not only promote the absorption of nutrients by the crop root system, but also avoid the precipitation of effective ions in the fertilizer, thereby ensuring that the effective ingredients of the fertilizer are fully absorbed and utilized. DA-6 (amino fresh fat) is a broad-spectrum plant growth regulator that can improve the photosynthesis of crops, thereby accelerating the transport of nutrients and promoting the absorption of nutrients in the soil by crops; DA-6 can also enhance the resistance of crops, so that crops have a good growth state and can still maintain a good growth state in adversity. The combined effect of sodium glutamate and DA-6 can not only provide suitable growth conditions for crops, but also enhance the physiological activity of crops, thereby improving the efficiency of fertilizer utilization by crops.

[0014] The fertilizer synergist in the present invention also includes an additive, which is a mixture of γ-polyglutamic acid, sodium humate, seaweed extract and banana peel extract. Among them, the γ-polyglutamic acid molecule contains a large number of super hydrophilic groups, which can not only retain moisture in the soil, but also form a thin film on the surface of the plant root hairs, which can ensure that the nutrients and moisture in the soil are in close contact with the root hairs, thereby improving the plant's absorption efficiency of nutrients; moreover, γ-polyglutamic acid has multiple negative charges, which can effectively prevent sulfate, phosphate, carbonate and other ions from combining with calcium ions, magnesium ions and trace elements, and avoid the conversion of effective ingredients into low-soluble salts, so that nutrients are more easily absorbed by crop roots; in addition, γ-polyglutamic acid can increase the proline content and antioxidant enzyme activity in the plant by affecting the plant calcium signal, thereby enhancing the disease resistance, frost resistance, drought resistance and other stress resistance of the crop, so that the crop maintains a good growth state. Sodium humate has a chelating function and can form stable complexes with trace elements to prevent these elements from being fixed in the soil and losing their effectiveness. The formed complexes can be more easily absorbed by crop roots, thereby improving the utilization rate of fertilizers. Moreover, the organic matter in sodium humate can promote microbial activity and create a favorable growth environment for crop roots by increasing soil fertility, thereby promoting the absorption and utilization of nutrients by the roots. In addition, the various active groups in sodium humate, such as carboxyl and phenolic hydroxyl groups, can bind to receptors on plant cell membranes and regulate plant physiological processes, thereby promoting root development and making crop roots more developed, which is beneficial for absorbing nutrients and water in the soil. Seaweed extracts are rich in polysaccharides, which can form a network structure near the plant roots and adsorb the active ingredients in the complex fertilizer through their functional groups, making the active ingredients of the fertilizer easier to be absorbed by the roots, thereby improving the utilization rate of the fertilizer; moreover, the active ingredients in the seaweed extracts can work synergistically with the microorganisms in the soil to activate a variety of microorganisms in the soil, which will produce a variety of enzymes and metabolites during the metabolism process, which will help improve the physical and chemical properties of the soil and increase the biological effectiveness of the soil. Banana peel extracts contain substances such as banana polyphenols, which can inhibit the activity of nitrifying bacteria in the soil, effectively reduce soil nitrification, and thus reduce the conversion of ammonium nitrogen to nitrate nitrogen, which helps to maintain a high level of soil ammonium nitrogen and effective nitrogen content, while reducing the soil nitrate nitrogen content and nitrogen loss; moreover, banana peel extracts also contain a variety of active ingredients such as amino acids, which can promote the division and growth of root cells, thereby improving the absorption capacity of crop roots for effective ingredients in the soil.

[0015] It can be seen from this that by introducing additives into the fertilizer enhancer in this application, while enhancing the efficacy of sodium glutamate and DA-6, it can also play a role in avoiding nutrient loss, improving soil environment, and enhancing crop resistance. When used in combination with fertilizers, it can effectively improve the utilization rate of fertilizers.

[0016] Based on the above technical solution, the present invention can also be improved as follows.

[0017] Further, the fertilizer synergist includes the following components in parts by weight:

[0018] 10 parts of sodium glutamate, 10 parts of DA-6 and 4 parts of additives.

[0019] Furthermore, the additive is prepared by mixing gamma-polyglutamic acid, sodium humate, seaweed extract and banana peel extract in a mass ratio of 8:2:1:4.

[0020] Further, the seaweed extract is prepared by the following steps:

[0021] (1) Take fresh seaweed, wash it, cut it into small pieces, and grind it with water to obtain slurry;

[0022] (2) adding cellulase to the slurry and performing enzymolysis at room temperature for 2 to 3 hours to obtain an enzymolysis material;

[0023] (3) Add ethanol to the enzymatic hydrolyzate, then perform ultrasonic oscillation, centrifuge, collect the supernatant, concentrate and dry to obtain the product.

[0024] Furthermore, the seaweed is at least one of kelp, hijiki, konbu and wakame.

[0025] Furthermore, the amount of cellulase added in step (2) is 0.5-1% of the mass of the slurry; the volume ratio of ethanol added to the enzymatic hydrolysis material in step (3) is 1-3:1; the ultrasonic oscillation frequency is 25-35 kHz, and the ultrasonic oscillation time is 30-45 min.

[0026] Furthermore, the mass ratio of cellulase to pectinase in the mixed enzyme is 3-5:1-3; and the added amount of the mixed enzyme is 0.5-1% of the mass of the base material.

[0027] The invention also discloses a preparation method of the fertilizer synergist, which comprises the following steps: taking a formula amount of sodium glutamate, DA-6 and additives, and mixing them at room temperature to obtain the fertilizer synergist.

[0028] The present invention also discloses the application of the fertilizer synergist in rice planting. Specifically, the fertilizer synergist is applied together with the fertilizer when applying tillering fertilizer in rice planting, and the fertilizer synergist used is 5-15% of the mass of the tillering fertilizer.

[0029] The beneficial effects of the present invention are:

[0030] 1. The fertilizer synergist in the present invention has a relatively simple composition, and the components interact with each other to provide suitable growth conditions for crops and enhance the physiological activity of crops, thereby improving the utilization efficiency of crops for fertilizers.

[0031] 2. The present invention introduces additives into the fertilizer synergist. While enhancing the efficacy of sodium glutamate and DA-6, the additives can also play a role in avoiding nutrient loss, improving the soil environment, and enhancing crop resistance. When used in combination with fertilizers, the utilization rate of the fertilizer can be effectively improved.

[0032] 3. The fertilizer synergist of the present invention contains banana peel extract, which achieves the purpose of resource utilization of banana peel.

[0033] 4. The fertilizer synergist of the present invention can effectively improve the absorption and utilization of fertilizers by crops, especially rice, and plays a positive role in increasing crop yields. DETAILED DESCRIPTION

[0034] The gamma-polyglutamic acid used in the present invention comes from Sichuan Weikeqi Biotechnology Co., Ltd.; the DA-6 used comes from Hebi Quanfeng Biotechnology Co., Ltd.; and the sodium humate used comes from Shandong Ruihongze Chemical Technology Co., Ltd.

[0035] The specific implementation modes of the present invention are described in detail below with reference to the embodiments.

[0036] Example 1

[0037] A fertilizer synergist, comprising the following components in parts by weight:

[0038] 10 parts of sodium glutamate, 10 parts of DA-6 and 4 parts of additives; wherein the additive is prepared by mixing γ-polyglutamic acid, sodium humate, seaweed extract and banana peel extract in a mass ratio of 8:2:1:4;

[0039] Banana peel extract is prepared by the following steps:

[0040] S1: Take a fully ripe banana, peel it, and mash the banana peel into a paste to obtain a base material;

[0041] S2: adding 1% of the base material's mass of mixed enzyme to the base material, mixing well and performing enzymolysis at room temperature for 6 hours to obtain an enzymolysis material; the mixed enzyme is prepared by mixing cellulase and pectinase in a mass ratio of 2:1;

[0042] S3: drying the enzymatic hydrolyzate at 60°C until the water content is less than 5%, and then crushing it into particles with a particle size of 150 mesh to obtain pellets;

[0043] S4: Using ethanol as the extraction solvent, the pellets were subjected to Soxhlet extraction for 7 h;

[0044] S5: Concentrate the extract until the volume no longer changes, and then dry it at 60°C to constant weight to obtain the product.

[0045] Seaweed extract is prepared by the following steps:

[0046] (1) Take fresh kelp, wash off the salt on the surface, cut into small pieces, mix with water of equal mass, grind to obtain slurry;

[0047] (2) adding 1% by weight of cellulase to the slurry and performing enzymolysis at room temperature for 2.5 h to obtain an enzymolysis material;

[0048] (3) Add an equal volume of ethanol to the enzymatic hydrolyzate, then ultrasonically oscillate at a frequency of 30 kHz for 45 min, and then centrifuge at 5000×g for 10 min. Collect the supernatant, concentrate in a water bath until the volume no longer changes, and then dry at 50°C to constant weight.

[0049] The fertilizer synergist in this embodiment is prepared by the following steps:

[0050] Take the formulated amount of sodium glutamate, DA-6 and additives, mix well at room temperature, and you have it.

[0051] Example 2

[0052] A fertilizer synergist, comprising the following components in parts by weight:

[0053] 10 parts of sodium glutamate, 10 parts of DA-6 and 2.5 parts of additives; wherein the additives are prepared by mixing γ-polyglutamic acid, sodium humate, seaweed extract and banana peel extract in a mass ratio of 10:1:3:3;

[0054] Banana peel extract is prepared by the following steps:

[0055] S1: Take a fully ripe banana, peel it, and mash the banana peel into a paste to obtain a base material;

[0056] S2: adding 0.5% of the base material's mass of mixed enzyme to the base material, mixing well and performing enzymolysis at room temperature for 8 hours to obtain an enzymolysis material; the mixed enzyme is prepared by mixing cellulase and pectinase in a mass ratio of 3:1;

[0057] S3: drying the enzymatic hydrolyzate at 70°C until the water content is less than 5%, and then crushing it into particles with a particle size of 200 mesh to obtain pellets;

[0058] S4: Using ethanol as the extraction solvent, the pellets were subjected to Soxhlet extraction for 6 h;

[0059] S5: The extract is concentrated until the volume no longer changes, and then dried at 50°C to constant weight.

[0060] Seaweed extract is prepared by the following steps:

[0061] (1) Take fresh kelp, wash off the impurities on the surface, cut into small pieces, mix with water of equal mass, grind to obtain slurry;

[0062] (2) adding 0.5% by weight of cellulase to the slurry and performing enzymolysis at room temperature for 3 h to obtain an enzymolysis material;

[0063] (3) Add an equal volume of ethanol to the enzymatic hydrolyzate, then ultrasonically oscillate at a frequency of 25 kHz for 45 min, and then centrifuge at 5000×g for 10 min. Collect the supernatant, concentrate in a water bath until the volume no longer changes, and then dry at 50°C to constant weight.

[0064] The fertilizer synergist in this embodiment is prepared by the following steps:

[0065] Take the formulated amount of sodium glutamate, DA-6 and additives, mix well at room temperature, and you have it.

[0066] Example 3

[0067] A fertilizer synergist, comprising the following components in parts by weight:

[0068] 10 parts of sodium glutamate, 10 parts of DA-6 and 5 parts of additives; wherein the additive is prepared by mixing γ-polyglutamic acid, sodium humate, seaweed extract and banana peel extract in a mass ratio of 5:3:1:5;

[0069] Banana peel extract is prepared by the following steps:

[0070] S1: Take a fully ripe banana, peel it, and mash the banana peel into a paste to obtain a base material;

[0071] S2: adding 1% of the base material's mass of mixed enzyme to the base material, mixing well and performing enzymolysis at room temperature for 4 hours to obtain an enzymolysis material; the mixed enzyme is prepared by mixing cellulase and pectinase in a mass ratio of 5:3;

[0072] S3: drying the enzymatic hydrolyzate at 50°C until the water content is less than 5%, and then crushing it into particles with a particle size of 100 mesh to obtain pellets;

[0073] S4: Using ethanol as the extraction solvent, the pellets were subjected to Soxhlet extraction for 8 h;

[0074] S5: The extract is concentrated until the volume no longer changes, and then dried at 70°C to constant weight.

[0075] Seaweed extract is prepared by the following steps:

[0076] (1) taking fresh Sargassum fusiformis, washing the impurities on the surface, cutting into small pieces, mixing with water of equal mass, grinding to obtain slurry;

[0077] (2) adding 1% by weight of cellulase to the slurry and performing enzymolysis at room temperature for 2 h to obtain an enzymolysis material;

[0078] (3) Add an equal volume of ethanol to the enzymatic hydrolyzate, then ultrasonically oscillate at a frequency of 35 kHz for 30 min, centrifuge at 5000 × g for 10 min, collect the supernatant, concentrate in a water bath until the volume no longer changes, and then dry at 50°C to constant weight to obtain the product.

[0079] The fertilizer synergist in this embodiment is prepared by the following steps:

[0080] Take the formulated amount of sodium glutamate, DA-6 and additives, mix well at room temperature, and you have it.

[0081] Comparative Example 1

[0082] A fertilizer synergist, comprising the following components in parts by weight:

[0083] 10 parts of sodium glutamate, 10 parts of DA-6 and 4 parts of additives; wherein the additive is prepared by mixing γ-polyglutamic acid, sodium humate and seaweed extract in a mass ratio of 8:2:1;

[0084] Seaweed extract is prepared by the following steps:

[0085] (1) Take fresh kelp, wash off the salt on the surface, cut into small pieces, mix with water of equal mass, grind to obtain slurry;

[0086] (2) adding 1% by weight of cellulase to the slurry and performing enzymolysis at room temperature for 2.5 h to obtain an enzymolysis material;

[0087] (3) Add an equal volume of ethanol to the enzymatic hydrolyzate, then ultrasonically oscillate at a frequency of 30 kHz for 45 min, and then centrifuge at 5000×g for 10 min. Collect the supernatant, concentrate in a water bath until the volume no longer changes, and then dry at 50°C to constant weight.

[0088] The fertilizer synergist in this comparative example is prepared by the following steps:

[0089] Take the formulated amount of sodium glutamate, DA-6 and additives, mix well at room temperature, and you have it.

[0090] Comparative Example 2

[0091] A fertilizer synergist, comprising the following components in parts by weight:

[0092] 10 parts of sodium glutamate, 10 parts of DA-6 and 4 parts of additives; wherein the additive is prepared by mixing γ-polyglutamic acid, sodium humate and banana peel extract in a mass ratio of 8:2:4;

[0093] Banana peel extract is prepared by the following steps:

[0094] S1: Take a fully ripe banana, peel it, and mash the banana peel into a paste to obtain a base material;

[0095] S2: adding 1% of the base material's mass of mixed enzyme to the base material, mixing well and performing enzymolysis at room temperature for 6 hours to obtain an enzymolysis material; the mixed enzyme is prepared by mixing cellulase and pectinase in a mass ratio of 2:1;

[0096] S3: drying the enzymatic hydrolyzate at 60°C until the water content is less than 5%, and then crushing it into particles with a particle size of 150 mesh to obtain pellets;

[0097] S4: Using ethanol as the extraction solvent, the pellets were subjected to Soxhlet extraction for 7 h;

[0098] S5: Concentrate the extract until the volume no longer changes, and then dry it at 60°C to constant weight to obtain the product.

[0099] The fertilizer synergist in this comparative example is prepared by the following steps:

[0100] Take the formulated amount of sodium glutamate, DA-6 and additives, mix well at room temperature, and you have it.

[0101] Comparative Example 3

[0102] A fertilizer synergist, comprising the following components in parts by weight:

[0103] 10 parts of sodium glutamate, 10 parts of DA-6 and 4 parts of additives; wherein the additive is a mixture of γ-polyglutamic acid and sodium humate in a mass ratio of 8:2.

[0104] The fertilizer synergist in this comparative example is prepared by the following steps:

[0105] Take the formulated amount of sodium glutamate, DA-6 and additives, mix well at room temperature, and you have it.

[0106] Comparative Example 4

[0107] A fertilizer synergist, comprising the following components in parts by weight:

[0108] 10 parts of sodium glutamate and 10 parts of DA-6.

[0109] The fertilizer synergist in this comparative example is prepared by the following steps:

[0110] Take the formulated amount of sodium glutamate and DA-6, mix well at room temperature, and you have the product.

[0111] Experimental example

[0112] A test area was set up in a plantation in the suburbs of Chengdu. Rice (Chuankangyou 6308) was used as the test variety to investigate the effect of the fertilizer enhancer in this application.

[0113] Experimental treatment: Eight planting plots were designated in the experimental area, numbered 1 to 8, and each planting plot had an area of ​​100m 2 , the planting plots were separated by 1m wide ridges. Rice was planted in 8 planting plots using conventional planting methods; 10 days after transplanting, tillering fertilizer was applied in the planting plots, wherein the planting plots numbered 1 to 3 were respectively applied with the fertilizer synergists in Examples 1 to 3; the planting plots numbered 4 to 7 were respectively applied with the fertilizer synergists in Comparative Examples 1 to 4, and the planting plot numbered 8 was only applied with tillering fertilizer; the amount of tillering fertilizer applied in each plot was the same, and the amount of fertilizer synergist used was 10% of the mass of tillering fertilizer; the tillering fertilizer was a mixture of urea and compound fertilizer (15-15-15 compound fertilizer) at a mass ratio of 2:1; and then the conventional rice management mode was adopted for management until the rice matured.

[0114] Soil was collected from the same location in each planting plot before application of tillering fertilizer and at the heading stage of rice to test the soil composition. The results are shown in Table 1.

[0115] Table 1 Soil composition at different time periods

[0116]

[0117] It can be seen from Table 1 that after applying the fertilizer synergist of the present invention (No. 1-3), the nutrients in the soil can be effectively retained, the effective ingredients of the fertilizer are not easily lost, and the utilization rate of the fertilizer is improved.

[0118] Compared with Example 1, Comparative Example 1 lacks banana peel extract and cannot effectively inhibit nitrifying bacteria in the soil. The nitrogen in the fertilizer tends to be converted into nitrate nitrogen, making the content of nitrate nitrogen in the soil higher than that of ammonium nitrogen, and rice is more likely to absorb ammonium nitrogen. Therefore, after the synergist in the embodiment of the present invention is used for synergistic enhancement, the fertilizer is more easily absorbed by rice, and the utilization rate of the fertilizer is improved.

[0119] In addition, during the heading period of rice, a rice plant was dug around and in the middle of each planting plot to ensure the integrity of the root system. The number of rice tillers in each planting plot was counted and the root status was observed. The results are shown in Table 2.

[0120] Table 2 Rice characteristics

[0121]

[0122] Note: The tillering numbers in the table are the rounded-off average values; "many" means the number of lateral roots is not less than 80; "relatively" means the number of lateral roots is 70-80; "sparse" means the number of lateral roots is less than 70; "thick and long" means the average length of lateral roots is not less than 45 cm, and the average diameter is about 1 mm; "slender" means the average length of lateral roots is 35-40 cm, and the average diameter is about 0.5 mm.

[0123] As can be seen from Table 2, the root system increased significantly, indicating that the fertilizer enhancer of the present invention can promote the growth of rice root system, and the root system is the main place for absorbing effective ingredients in the soil. The increase in the root system is conducive to the absorption of fertilizers, so that the utilization rate of fertilizers can be improved; feedback to rice is reflected in the increase in the number of rice tillers.

[0124] After the rice matured, the ear length and yield per mu of rice in each planting area were counted. The results are shown in Table 3.

[0125] Table 3 Rice panicle length and yield

[0126]

[0127] It can be seen from Table 3 that after the fertilizer synergist of the present invention is used for enhancement, the rice ear length is increased and the yield is also significantly improved. This is because after the synergist is used for enhancement, the fertilizer can be better absorbed and utilized by the rice, the fertilizer utilization rate is increased, and a higher yield is shown.

[0128] Although the specific implementation of the present invention is described in detail in conjunction with the embodiments, it should not be understood as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. An application of a fertilizer synergist, characterized in that: The fertilizer synergist is used in rice planting. When tillering fertilizer is applied during rice planting, the fertilizer synergist is applied together with the fertilizer. The amount of the fertilizer synergist used is 5-15% of the mass of the tillering fertilizer. The fertilizer synergist is composed of the following components in parts by mass: 10 parts of sodium glutamate, 10 parts of DA-6 and 2.5-5 parts of additives; the additives are prepared by mixing γ-polyglutamic acid, sodium humate, seaweed extract and banana peel extract in a mass ratio of 5-10:1-3:1-3:3-5; the banana peel extract is prepared by the following steps: S1: Take a fully ripe banana, peel it, and mash the banana peel into a paste to obtain a base material; S2: adding a mixed enzyme to the base material, mixing well and performing enzymolysis at room temperature for 4 to 8 hours to obtain an enzymolysis material; the mixed enzyme includes cellulase and pectinase; S3: drying the enzymatic hydrolyzate at 50-70°C until the water content is less than 5%, and then crushing it into particles with a particle size of 100-200 mesh to obtain pellets; S4: Using ethanol as the extraction solvent, the pellets were subjected to Soxhlet extraction for 6 to 8 hours; S5: Concentrate the extract until the volume no longer changes, and then dry it at 50-70°C to constant weight to obtain the product; The seaweed extract is prepared by the following steps: (1) Take fresh seaweed, wash it, cut it into small pieces, and grind it with water to obtain slurry; (2) adding cellulase to the slurry and performing enzymolysis at room temperature for 2 to 3 hours to obtain an enzymolysis material; (3) adding ethanol to the enzymatic hydrolyzate, then subjecting it to ultrasonic oscillation, centrifuging it, collecting the supernatant, concentrating it, and drying it to obtain; The fertilizer synergist is prepared by the following steps: Take the formulated amount of sodium glutamate, DA-6 and additives, mix well at room temperature, and you have it.

2. The use of the fertilizer synergist according to claim 1, characterized in that: The fertilizer synergist consists of the following components in parts by mass: 10 parts of sodium glutamate, 10 parts of DA-6 and 4 parts of additives.

3. The use of the fertilizer synergist according to claim 2, characterized in that: The additive is prepared by mixing gamma-polyglutamic acid, sodium humate, seaweed extract and banana peel extract in a mass ratio of 8:2:1:

4.

4. The use of the fertilizer synergist according to claim 1, characterized in that: The seaweed is at least one of kelp, hijiki, kelp and wakame.

5. The use of the fertilizer synergist according to claim 1, characterized in that: The amount of cellulase added in step (2) is 0.5-1% of the mass of the slurry; the volume ratio of ethanol added to the enzymatic hydrolysis material in step (3) is 1-3:1; the ultrasonic oscillation frequency is 25-35 kHz, and the ultrasonic oscillation time is 30-45 min.

6. The use of the fertilizer synergist according to claim 1, characterized in that: The mass ratio of cellulase to pectinase in the mixed enzyme is 3-5:1-3; and the added amount of the mixed enzyme is 0.5-1% of the mass of the base material.

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