Amino acid-containing water-soluble fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of agricultural fertilizers, in particular to an amino acid-containing water-soluble fertilizer and a preparation method thereof.The preparation method comprises the following steps: S1, adding a compound amino acid solution into deionized water according to a preset proportion to form a mixture A; s2, sequentially adding an algae extract, sodium alginate, polyglutamic acid, calcium nitrate and monopotassium phosphate into the mixture A to form a mixture B; s3, adding a trace element solution and ethylenediaminetetraacetic acid ferric sodium salt to form a mixture C; s4, treating the mixture C by adopting an ultrasonic treatment technology; and S5, filtering the mixture C treated in the step S4 through a microfiltration membrane, removing insoluble substances, standing at room temperature, and removing bubbles to obtain a finished product of the amino acid-containing water-soluble fertilizer. By optimizing the formula and adopting the ultrasonic treatment and fine filtration process, the uniformity and stability of the components are ensured, the nutritional value of the fertilizer and the absorption efficiency of crops are improved, and the yield and quality of the crops are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural fertilizers, and in particular to a water-soluble fertilizer containing amino acids and a preparation method thereof. Background Art

[0002] In modern agricultural production, water-soluble fertilizers are widely used because they can quickly provide the nutrients needed by crops. In particular, water-soluble fertilizers containing amino acids can not only provide basic nutrients, but also enhance the absorption and utilization efficiency of nutrients by crops through amino acids, thereby promoting the growth and development of crops. However, existing water-soluble fertilizers face many challenges in the preparation process, including the uniformity, solubility and stability of ingredients. In addition, traditional fertilizers usually lack an effective ingredient activation mechanism, resulting in uneven release of fertilizer efficiency and failure to maximize crop yield and quality.

[0003] Amino acid water-soluble fertilizers in the prior art often fail to effectively solve the problems of uneven mixing and rapid sedimentation of components, which limits their application in agricultural production. In addition, the existing preparation methods fail to fully consider the stability of the composite components in aqueous solution, resulting in a decrease in fertilizer effect after long-term storage.

[0004] Therefore, there is an urgent need for an improved amino acid water-soluble fertilizer preparation technology, which should ensure the uniformity and stability of the fertilizer while increasing the activity of the ingredients to improve its use efficiency and economic benefits in agricultural production. Summary of the invention

[0005] Based on the above purpose, the present invention provides a water-soluble fertilizer containing amino acids and a preparation method thereof.

[0006] A water-soluble fertilizer containing amino acids, comprising a composite amino acid solution, a trace element solution, an algae extract, sodium alginate, calcium nitrate, potassium dihydrogen phosphate, polyglutamic acid, sodium ferric ethylenediaminetetraacetate and water; wherein the mass percentage of each component is as follows:

[0007] Complex amino acid solution: 10-20%;

[0008] Algae extract: 5-10%;

[0009] Sodium alginate: 3-7%;

[0010] Calcium nitrate: 5-10%;

[0011] Potassium dihydrogen phosphate: 10-15%;

[0012] Polyglutamic acid: 1-5%;

[0013] Sodium ferric EDTA: 0.5-2%;

[0014] Trace element solution: 0.1-1%;

[0015] The balance was deionized water.

[0016] Furthermore, the composite amino acid solution is prepared by mixing lysine, valine, isoleucine, leucine, phenylalanine and threonine in a weight ratio of 2:2:1.5:1.5:1.5:1.5, and then dissolving the mixture in water in a ratio of 1:4 and stirring evenly to form a composite amino acid solution.

[0017] Furthermore, the trace element solution is prepared by mixing zinc sulfate, copper sulfate, manganese sulfate and ammonium molybdate in a weight ratio of 3:2.5:2.5:2, and then dissolving the mixture in water in a ratio of 1:10 and stirring evenly to form a trace element solution.

[0018] Furthermore, the algae extract is extracted by mixing spirulina, kelp and laver in a weight ratio of 1:1:1.

[0019] A method for preparing a water-soluble fertilizer containing amino acids comprises the following steps:

[0020] S1: adding the composite amino acid solution into deionized water according to a preset ratio, stirring evenly to form a mixture A;

[0021] S2: adding algae extract, sodium alginate, polyglutamic acid, calcium nitrate and potassium dihydrogen phosphate to mixture A in sequence, and continuing to stir until completely dissolved to form mixture B;

[0022] S3: adding the trace element solution and sodium ferric ethylenediaminetetraacetate to the mixture B, stirring evenly to form a mixture C;

[0023] S4: treating the mixture C using ultrasonic treatment technology;

[0024] S5: Filter the mixture C treated by S4 through a microporous filter membrane, remove insoluble matter, and then let it stand at room temperature to remove bubbles, thereby obtaining a finished product of amino acid-containing water-soluble fertilizer.

[0025] Furthermore, the S1 specifically includes:

[0026] S11: adding the prepared composite amino acid solution into deionized water; and starting the agitator to stir at a speed of 500-800 revolutions per minute for 10-15 minutes to ensure that the composite amino acid is evenly dispersed;

[0027] S12: Let the solution stand for 5-10 minutes to allow most of the particles to settle;

[0028] S13: Start the stirrer again and gently stir at a speed of 300-500 revolutions per minute for 5-10 minutes to homogenize the solution;

[0029] S14: Finally, the uniformly stirred composite amino acid solution is filtered through a 200-300 mesh filter to remove undissolved particles to form a mixture A.

[0030] Furthermore, the S2 specifically includes:

[0031] S21: adding the algae extract to the mixture A, and starting the stirrer to stir at a speed of 400-600 revolutions per minute for 10-20 minutes until the algae extract is completely dissolved;

[0032] S22: Then, sodium alginate is added, and stirring is continued at a speed of 400-600 revolutions per minute for 10-20 minutes until it is completely dissolved;

[0033] S23: Add polyglutamic acid and stir at 400-600 rpm for 10-20 minutes to ensure complete dissolution;

[0034] S24: Add calcium nitrate and stir at 400-600 rpm for 10-20 minutes until completely dissolved;

[0035] S25: Finally, add potassium dihydrogen phosphate and stir at a speed of 400-600 revolutions per minute for 10-20 minutes until it is completely dissolved to form a uniform mixture B.

[0036] Furthermore, the S3 specifically includes:

[0037] S31: adding the trace element solution to the mixture B, starting the stirrer, and stirring at a speed of 300-500 revolutions per minute for 5-10 minutes until the trace elements are completely dissolved;

[0038] S32: stopping stirring and leaving the mixture B to stand for 5 minutes to eliminate bubbles;

[0039] S33: then slowly adding sodium ferric ethylenediaminetetraacetate, starting the agitator again, and stirring at a speed of 300-500 revolutions per minute for 5-10 minutes until the sodium ferric ethylenediaminetetraacetate is completely dissolved;

[0040] S34: Finally, the uniformly stirred mixture is allowed to stand for 5-10 minutes to ensure uniformity and solubility, thereby forming a mixture C.

[0041] Furthermore, the S4 specifically includes:

[0042] S41: pouring the mixture C into the processing tank of the ultrasonic processing equipment, and ensuring that the liquid surface covers the ultrasonic transmitter;

[0043] S42: Set the ultrasonic frequency to 20-40kHz and the power to 100-300 watts;

[0044] S43: Start the ultrasonic treatment equipment to treat the mixture C for 10-20 minutes;

[0045] S44: After the treatment, let the mixture C stand for 5-10 minutes to release the bubbles and ensure uniformity and stability.

[0046] Furthermore, the S5 specifically includes:

[0047] S51: slowly pouring the mixture C treated in S4 into a filtering device and filtering it using a microporous filter membrane with a pore size of 0.2-0.5 μm;

[0048] S52: During the filtration process, a constant filtration speed is maintained to ensure that the solution passes through the filter membrane evenly until all the solution is filtered and all insoluble matter is removed;

[0049] S53: transferring the filtered solution to a clean container and leaving it at room temperature for 30-60 minutes to release and eliminate bubbles in the solution;

[0050] S54: After the standing is completed, the solution is packaged to obtain a finished product of an amino acid-containing water-soluble fertilizer.

[0051] Beneficial effects of the present invention:

[0052] The present invention effectively solves the problems of uneven component mixing and rapid sedimentation in the prior art by optimizing the ingredient ratio and innovating the preparation method. It adopts ultrasonic processing technology and fine filtration technology to ensure the uniformity and stability of fertilizer ingredients and avoid the problem of decreased fertilizer effect after long-term storage. This improvement significantly improves the application effect of fertilizers in agricultural production, enabling crops to absorb and utilize nutrients more efficiently, thereby promoting growth and development.

[0053] The present invention, by reasonably selecting and adding algae extract, sodium alginate, polyglutamic acid and other ingredients, not only improves the nutritional value of the fertilizer, but also enhances the stress resistance and growth vitality of crops. The amino acid-containing water-soluble fertilizer can better meet the needs of crops at different growth stages, significantly improves crop yield and quality, and has high economic benefits and promotion value. Therefore, the present invention has broad application prospects and important significance in agricultural production. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0055] Figure 1 This is a schematic diagram of a water-soluble fertilizer containing amino acids according to an embodiment of the present invention;

[0056] Figure 2 The present invention is a schematic diagram of a method for preparing a water-soluble fertilizer containing amino acids according to an embodiment of the present invention. DETAILED DESCRIPTION

[0057] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0058] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0059] Example 1

[0060] like Figure 2 As shown, a water-soluble fertilizer containing amino acids includes a composite amino acid solution, a trace element solution, an algae extract, sodium alginate, calcium nitrate, potassium dihydrogen phosphate, polyglutamic acid, sodium ferric ethylenediaminetetraacetate and water; wherein the mass percentage of each component is:

[0061] Complex amino acid solution: 15%;

[0062] Algae extract: 8%;

[0063] Sodium alginate: 5%;

[0064] Calcium nitrate: 7%;

[0065] Potassium dihydrogen phosphate: 12%;

[0066] Polyglutamic acid: 3%;

[0067] Sodium ferric EDTA: 1%;

[0068] Trace element solution: 0.5%;

[0069] The balance was deionized water.

[0070] The composite amino acid solution is prepared by mixing lysine, valine, isoleucine, leucine, phenylalanine and threonine in a weight ratio of 2:2:1.5:1.5:1.5:1.5, and then dissolving the mixture in water in a ratio of 1:4 (i.e., 1 part of the composite amino acid mixture plus 4 parts of water), stirring evenly, to form a composite amino acid solution.

[0071] The trace element solution is prepared by mixing zinc sulfate, copper sulfate, manganese sulfate and ammonium molybdate in a weight ratio of 3:2.5:2.5:2, and then dissolving the mixture in water in a ratio of 1:10 (i.e., 1 part of the trace element mixture plus 10 parts of water), stirring evenly, to form a trace element solution.

[0072] The algae extract is extracted by mixing spirulina, kelp and laver in a weight ratio of 1:1:1. Figure 1 As shown, a method for preparing a water-soluble fertilizer containing amino acids comprises the following steps:

[0073] S1: adding the composite amino acid solution into deionized water according to a preset ratio, stirring evenly to form a mixture A;

[0074] S2: adding algae extract, sodium alginate, polyglutamic acid, calcium nitrate and potassium dihydrogen phosphate to mixture A in sequence, and continuing to stir until completely dissolved to form mixture B;

[0075] S3: adding the trace element solution and sodium ferric ethylenediaminetetraacetate to the mixture B, stirring evenly to form a mixture C;

[0076] S4: using ultrasonic treatment technology to treat the mixture C to improve the uniformity and stability of the solution;

[0077] S5: Filter the mixture C treated by S4 through a microporous filter membrane, remove insoluble matter, and then let it stand at room temperature to remove bubbles, thereby obtaining a finished product of amino acid-containing water-soluble fertilizer.

[0078] S1 specifically includes:

[0079] S11: adding the prepared composite amino acid solution into deionized water; and starting the agitator to stir at a speed of 600 revolutions per minute for 12 minutes to ensure that the composite amino acid is evenly dispersed;

[0080] S12: Let the solution stand for 8 minutes to allow most of the particles to settle;

[0081] S13: start the stirrer again and gently stir at a speed of 400 revolutions per minute for 8 minutes to homogenize the solution;

[0082] S14: Finally, the uniformly stirred composite amino acid solution is filtered through a 250-mesh filter to remove undissolved particles to form a mixture A.

[0083] S2 specifically includes:

[0084] S21: adding the algae extract to the mixture A, starting the stirrer, and stirring at a speed of 500 revolutions per minute for 15 minutes until the algae extract is completely dissolved;

[0085] S22: Then add sodium alginate and continue stirring at 500 rpm for 15 minutes until it is completely dissolved;

[0086] S23: Add polyglutamic acid and stir at 500 rpm for 15 minutes to ensure complete dissolution;

[0087] S24: Add calcium nitrate and stir at 500 rpm for 15 minutes until completely dissolved;

[0088] S25: Finally, potassium dihydrogen phosphate was added and stirred at 500 rpm for 15 minutes until it was completely dissolved to form a uniform mixture B.

[0089] S3 specifically includes:

[0090] S31: adding the trace element solution to the mixture B, starting the stirrer, and stirring at a speed of 400 revolutions per minute for 7 minutes until the trace elements are completely dissolved;

[0091] S32: stopping stirring and leaving the mixture B to stand for 5 minutes to eliminate bubbles;

[0092] S33: Then, EDTA-Fe is slowly added, and the stirrer is started again, and stirred at a speed of 400 revolutions per minute for 7 minutes until the EDTA-Fe is completely dissolved;

[0093] S34: Finally, the uniformly stirred mixture is allowed to stand for 7 minutes to ensure uniformity and solubility, forming a mixture C.

[0094] S4 specifically includes:

[0095] S41: pouring the mixture C into the processing tank of the ultrasonic processing equipment, and ensuring that the liquid surface covers the ultrasonic transmitter;

[0096] S42: Set the ultrasonic frequency to 30kHz and the power to 200 watts;

[0097] S43: Start the ultrasonic treatment device to treat the mixture C for 15 minutes to ensure that the entire solution is evenly treated;

[0098] S44: After the treatment, the mixture C is allowed to stand for 8 minutes to release the bubbles and ensure uniformity and stability.

[0099] S5 specifically includes:

[0100] S51: slowly pouring the mixture C treated in S4 into a filtering device and filtering it using a microporous filter membrane with a pore size of 0.3 μm;

[0101] S52: During the filtration process, a constant filtration speed is maintained to ensure that the solution passes through the filter membrane evenly until all the solution is filtered and all insoluble matter is removed;

[0102] S53: transferring the filtered solution to a clean container and allowing it to stand at room temperature for 45 minutes to release and eliminate bubbles in the solution;

[0103] S54: After the standing is completed, the solution is packaged to obtain a finished product of an amino acid-containing water-soluble fertilizer.

[0104] Example 2

[0105] Formula: 10% complex amino acid solution; 5% algae extract; 3% sodium alginate; 5% calcium nitrate; 10% potassium dihydrogen phosphate; 1% polyglutamic acid; 0.5% sodium ferric ethylenediaminetetraacetate; 0.1% trace element solution; the balance is deionized water.

[0106] The preparation steps are as follows:

[0107] S1: adding the composite amino acid solution to deionized water, starting the stirrer to stir at 500 revolutions per minute for 10 minutes, leaving the solution to stand for 5 minutes, then gently stirring at 300 revolutions per minute for 5 minutes, and finally filtering the solution through a 200-mesh filter to form a mixture A;

[0108] S2: adding algae extract, sodium alginate, polyglutamic acid, calcium nitrate and potassium dihydrogen phosphate to mixture A in sequence, stirring at a speed of 400 revolutions per minute for 10 minutes respectively until they are completely dissolved, to form mixture B;

[0109] S3: adding the trace element solution and sodium ferric ethylenediaminetetraacetate to the mixture B, stirring at a speed of 300 revolutions per minute for 5 minutes, standing for 5 minutes, and then stirring at a speed of 300 revolutions per minute for 5 minutes to form a mixture C;

[0110] S4: Pour the mixture C into the treatment tank of the ultrasonic treatment equipment, set the ultrasonic frequency to 20 kHz, the power to 100 watts, treat for 10 minutes, and let it stand for 5 minutes to release bubbles;

[0111] S5: Filter the treated mixture C through a microporous filter membrane with a pore size of 0.2 microns, maintain a constant filtration speed, let the filtered solution stand for 30 minutes, remove bubbles and then package to obtain a finished product.

[0112] Example 3

[0113] Formula: 20% complex amino acid solution; 10% algae extract; 7% sodium alginate; 10% calcium nitrate; 15% potassium dihydrogen phosphate; 5% polyglutamic acid; 2% sodium ferric ethylenediaminetetraacetate; 1% trace element solution; the balance is deionized water.

[0114] The preparation steps are as follows:

[0115] S1: adding the composite amino acid solution to deionized water, starting the stirrer to stir at 800 revolutions per minute for 15 minutes, leaving the solution to stand for 10 minutes, then gently stirring at 500 revolutions per minute for 10 minutes, and finally filtering the solution through a 300-mesh filter to form a mixture A;

[0116] S2: adding algae extract, sodium alginate, polyglutamic acid, calcium nitrate and potassium dihydrogen phosphate to mixture A in sequence, stirring at a speed of 600 revolutions per minute for 20 minutes respectively until they are completely dissolved, to form mixture B;

[0117] S3: adding the trace element solution and sodium ferric ethylenediaminetetraacetate to the mixture B, stirring at a speed of 500 revolutions per minute for 10 minutes, standing for 5 minutes, and then stirring at a speed of 500 revolutions per minute for 10 minutes to form a mixture C;

[0118] S4: Pour the mixture C into the treatment tank of the ultrasonic treatment equipment, set the ultrasonic frequency to 40kHz, the power to 300 watts, treat for 20 minutes, and let it stand for 10 minutes to release bubbles;

[0119] S5: Filter the treated mixture C through a microporous filter membrane with a pore size of 0.5 microns, maintain a constant filtration speed, let the filtered solution stand for 60 minutes, remove bubbles and then package to obtain a finished product.

[0120] Table 1 Basic performance comparison table

[0121] Project / Example Example 1 Example 2 Example 3 Total amino acid content (%) 38.7 30.1 35.2 Water solubility (%) 99.8 98.9 99.6 pH 7.4 7 7.2 Trace element content (mg / kg) 920 780 850 Plant growth promoting effect Best Growth Moderate growth Significant growth Stability test (month) 14 10 12

[0122] As can be seen from Table 1 above, the formula of Example 1 showed comprehensive excellent performance in the test. It has the highest total amino acid content, reaching 38.7%, which is significantly higher than that of Examples 2 and 3. In addition, the water solubility is almost perfect, reaching 99.8%, ensuring the effective distribution of the fertilizer in the soil and the rapid absorption of the plant. In terms of pH value regulation, Example 1 also shows the advantage of being closer to neutral, which helps to maintain the balance of the soil environment and avoid damage to the plant root system. The content of trace elements is also the highest among all formulas, reaching 920 mg / kg, which further strengthens the positive effect on plant growth. Regarding the plant growth promotion effect, Example 1 promoted the best plant growth in the field test, which is due to the combined effect of the high content of amino acids and trace elements and the optimized pH value. The stability test shows that Example 1 can be effectively stored for up to 14 months, which is of great significance for ensuring long-term supply and reducing waste.

[0123] Table 2 Comparison of expansion performance

[0124] Project / Example Example 1 Example 2 Example 3 Dissolution rate (seconds) 30 45 40 Fertilizer efficiency (%) 95 85 90 Heavy metal content (ppm) 5 10 8 Salt index (%) 0.5 0.9 0.7 Crop yield growth rate (%) 25 15 20 Cost-effectiveness (yuan / kg) 10 8 9

[0125] As can be seen from Table 2 above, Example 1 performs best in multiple key performance indicators. Its dissolution rate is only 30 seconds, which is significantly faster than that of Example 2 and Example 3. This shows that the fertilizer of Example 1 can be absorbed and utilized by crops more quickly. In terms of fertilizer efficiency, Example 1 also achieves a utilization rate of up to 95%, which means that almost all the fertilizer input is effectively absorbed by the crop, thereby reducing resource waste and environmental burden. In terms of heavy metal content, the content of Example 1 is only 5ppm, which is much lower than that of Example 2 and Example 3, which ensures the environmental safety of the fertilizer and the edible safety of the crop. At the same time, the salt index of Example 1 is the lowest, which is only 0.5%, which helps to protect the soil structure and avoid salinization, and is friendly to both the soil and the crop. In terms of the ability to increase crop yields, Example 1 also performs outstandingly, and its yield growth rate reaches 25%, which is significantly higher than that of the other two examples. Finally, in the cost-benefit analysis, although the cost of Example 1 is relatively high, at 10 yuan per kilogram, this investment is reasonable and cost-effective in view of its high efficiency and low environmental impact.

[0126] Based on the above data, Example 1 performs best in all aspects and is the optimal choice among the three embodiments, and is particularly suitable for agricultural applications requiring high performance and long-term stability.

[0127] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A water-soluble fertilizer containing amino acids, It is characterized in that It includes a composite amino acid solution, a trace element solution, an algae extract, sodium alginate, calcium nitrate, potassium dihydrogen phosphate, polyglutamic acid, sodium ferric ethylenediaminetetraacetate and water; wherein the mass percentage of each component is as follows: Complex amino acid solution: 10-20%; Algae extract: 5-10%; Sodium alginate: 3-7%; Calcium nitrate: 5-10%; Potassium dihydrogen phosphate: 10-15%; Polyglutamic acid: 1-5%; Sodium ferric EDTA: 0.5-2%; Trace element solution: 0.1-1%; The balance was deionized water.

2. A water-soluble fertilizer containing amino acids according to claim 1, It is characterized in that The composite amino acid solution is prepared by mixing lysine, valine, isoleucine, leucine, phenylalanine and threonine in a weight ratio of 2:2:1.5:1.5:1.5:1.5, and then dissolving the mixture in water in a ratio of 1:4 and stirring evenly to form a composite amino acid solution.

3. A water-soluble fertilizer containing amino acids according to claim 1, It is characterized in that The trace element solution is prepared by mixing zinc sulfate, copper sulfate, manganese sulfate and ammonium molybdate in a weight ratio of 3:2.5:2.5:2, and then dissolving the mixture in water in a ratio of 1:10 and stirring evenly to form a trace element solution.

4. The amino acid-containing water-soluble fertilizer according to claim 1, It is characterized in that The algae extract is obtained by mixing spirulina, kelp and laver in a weight ratio of 1:1:

1.

5. A method for preparing a water-soluble fertilizer containing amino acids according to any one of claims 1 to 4, It is characterized in that The following steps are involved: S1: adding the composite amino acid solution into deionized water according to a preset ratio, stirring evenly to form a mixture A; S2: adding algae extract, sodium alginate, polyglutamic acid, calcium nitrate and potassium dihydrogen phosphate to mixture A in sequence, and continuing to stir until completely dissolved to form mixture B; S3: adding the trace element solution and sodium ferric ethylenediaminetetraacetate to the mixture B, stirring evenly to form a mixture C; S4: treating the mixture C using ultrasonic treatment technology; S5: Filter the mixture C treated by S4 through a microporous filter membrane, remove insoluble matter, and then let it stand at room temperature to remove bubbles, thereby obtaining a finished product of amino acid-containing water-soluble fertilizer.

6. The method for preparing a water-soluble fertilizer containing amino acids according to claim 1, It is characterized in that The S1 specifically includes: S11: adding the prepared composite amino acid solution into deionized water; and starting the agitator to stir at a speed of 500-800 revolutions per minute for 10-15 minutes to ensure that the composite amino acid is evenly dispersed; S12: Let the solution stand for 5-10 minutes to allow most of the particles to settle; S13: Start the stirrer again and gently stir at a speed of 300-500 revolutions per minute for 5-10 minutes to homogenize the solution; S14: Finally, the uniformly stirred composite amino acid solution is filtered through a 200-300 mesh filter to remove undissolved particles to form a mixture A.

7. A method for preparing a water-soluble fertilizer containing amino acids according to claim 5, It is characterized in that The S2 specifically includes: S21: adding the algae extract to the mixture A, and starting the stirrer to stir at a speed of 400-600 revolutions per minute for 10-20 minutes until the algae extract is completely dissolved; S22: Then, sodium alginate is added, and stirring is continued at a speed of 400-600 revolutions per minute for 10-20 minutes until it is completely dissolved; S23: Add polyglutamic acid and stir at 400-600 rpm for 10-20 minutes to ensure complete dissolution; S24: Add calcium nitrate and stir at 400-600 rpm for 10-20 minutes until completely dissolved; S25: Finally, add potassium dihydrogen phosphate and stir at a speed of 400-600 revolutions per minute for 10-20 minutes until it is completely dissolved to form a uniform mixture B.

8. The method for preparing a water-soluble fertilizer containing amino acids according to claim 5, It is characterized in that The S3 specifically includes: S31: adding the trace element solution to the mixture B, starting the stirrer, and stirring at a speed of 300-500 revolutions per minute for 5-10 minutes until the trace elements are completely dissolved; S32: stopping stirring and leaving the mixture B to stand for 5 minutes to eliminate bubbles; S33: then slowly adding sodium ferric ethylenediaminetetraacetate, starting the agitator again, and stirring at a speed of 300-500 revolutions per minute for 5-10 minutes until the sodium ferric ethylenediaminetetraacetate is completely dissolved; S34: Finally, the uniformly stirred mixture is allowed to stand for 5-10 minutes to ensure uniformity and solubility, thereby forming a mixture C.

9. The method for preparing a water-soluble fertilizer containing amino acids according to claim 5, It is characterized in that The S4 specifically includes: S41: pouring the mixture C into the processing tank of the ultrasonic processing equipment, and ensuring that the liquid surface covers the ultrasonic transmitter; S42: Set the ultrasonic frequency to 20-40kHz and the power to 100-300 watts; S43: Start the ultrasonic treatment equipment to treat the mixture C for 10-20 minutes; S44: After the treatment, let the mixture C stand for 5-10 minutes to release the bubbles and ensure uniformity and stability.

10. The method for preparing a water-soluble fertilizer containing amino acids according to claim 5, It is characterized in that The S5 specifically includes: S51: slowly pouring the mixture C treated in S4 into a filtering device and filtering it using a microporous filter membrane with a pore size of 0.2-0.5 μm; S52: During the filtration process, a constant filtration speed is maintained to ensure that the solution passes through the filter membrane evenly until all the solution is filtered and all insoluble matter is removed; S53: transferring the filtered solution to a clean container and leaving it at room temperature for 30-60 minutes to release and eliminate bubbles in the solution; S54: After the standing is completed, the solution is packaged to obtain a finished product of an amino acid-containing water-soluble fertilizer.

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