Amino acid chelated water-soluble fertilizer and preparation method thereof

Abstract

The present invention relates to the technical field of water-soluble fertilizers, and in particular to an amino acid chelate water-soluble fertilizer and a preparation method thereof, comprising the following raw materials in parts by weight: 35-45 parts of nitrogen, phosphorus and potassium fertilizers, 15-20 parts of amino acids, 10-15 parts of sodium humate, 7-13 parts of whisker regulators, 5-10 parts of graphene modifiers, 4-7 parts of organic matter, 3-5 parts of alginic acid, and 45-50 parts of water. The amino acid chelate water-soluble fertilizer of the present invention adopts nitrogen, phosphorus and potassium fertilizers, amino acids, sodium humate, organic matter, alginic acid, whisker regulators, and graphene modifiers, and adopts the synergistic combination of the two to enhance the synergy, so that the product has a coordinated improvement effect on soil heavy metal improvement and plant quality improvement.

Description

Technical Field

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

[0002] Water-soluble fertilizers have been rapidly developed in my country in recent years due to their advantages of labor-saving and quick results. They are also the development trend of modern agricultural fertilizers in my country. Water-soluble fertilizers use fertilizers together with water, which solves the problem of fertilization in the field and greatly improves labor efficiency. Existing water-soluble fertilizers have low fertilizer efficiency, poor improvement in plant quality, and low efficiency in optimizing soil heavy metals, which limits the efficiency of product use. Summary of the invention

[0003] In view of the defects of the prior art, the object of the present invention is to provide an amino acid chelated water-soluble fertilizer and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0004] The present invention solves the technical problem by adopting the following technical solution:

[0005] The present invention provides an amino acid chelate water-soluble fertilizer, comprising the following raw materials in parts by weight:

[0006] 35-45 parts of nitrogen, phosphorus and potassium fertilizers, 15-20 parts of amino acids, 10-15 parts of sodium humate, 7-13 parts of whisker regulators, 5-10 parts of graphene modifiers, 4-7 parts of organic matter, 3-5 parts of alginic acid, and 45-50 parts of water;

[0007] The preparation method of the whisker body regulator is:

[0008] S01: The aluminum borate whiskers are first mixed with a sufficient amount of a 5% by mass potassium permanganate solution, then washed and dried, and the dried aluminum borate whiskers and a 2% by mass dodecylbenzene sulfonic acid solution are mixed in a weight ratio of 2:5 to obtain a whisker solution;

[0009] S02: adding 2 to 5 parts of nano-silica modifier and 1 to 3 parts of lanthanum nitrate solution to 4 to 7 parts of chitosan solution, and then adding 2 to 4 parts of silane coupling agent KH560 and 3 to 5 parts of nano-carbon powder, stirring well to obtain nano-silica liquid;

[0010] S03: The whisker liquid and the nano-silica liquid are mixed in a weight ratio of 4:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a whisker body regulator.

[0011] Preferably, the nitrogen, phosphorus and potassium fertilizer is a compound of urea, diammonium phosphate and potassium nitrate in a weight ratio of 3:2:1; the amino acid is one of glutamic acid, histidine, aspartic acid, proline, valine, alanine and leucine;

[0012] The organic matter is prepared by mixing 5-9 parts of livestock manure with 10-15 parts of water, and then stacking the mixture at 45°C for 30 days. Finally, the mixture is crushed in a grinder to a size of 100 mesh to obtain the organic matter.

[0013] Preferably, the mass fraction of the lanthanum nitrate solution is 2-5%; the mass fraction of the chitosan solution is 4-7%.

[0014] Preferably, the preparation method of the nano-silicon dioxide modifier is:

[0015] The nano-silica is first treated with proton irradiation at a power of 350-400W for 10-15 minutes. After the irradiation, the irradiated nano-silica agent, sodium lignin sulfonate solution and phosphate buffer solution are fully mixed in a weight ratio of 2:5:3, and finally washed with water and dried to obtain a nano-silica modifier.

[0016] Preferably, the mass fraction of the sodium lignin sulfonate solution is 10-15%; and the pH value of the phosphate buffer solution is 5.5.

[0017] Preferably, the preparation method of the graphene modifier is:

[0018] S11: heating the graphene to 210-220°C at a rate of 1-3°C / min, keeping the temperature for 5-10min, then heating it to 350°C at a rate of 2-5°C / min, keeping the temperature for 2min, and finally air cooling it to room temperature;

[0019] S12: 4 to 7 parts of S11 treated graphene, 1 to 3 parts of nano-silica sol, 2 to 5 parts of urea and 4 to 7 parts of sodium citrate solution are mixed and ball-milled thoroughly. After the ball-milling is completed, the mixture is washed with water and dried to obtain a graphene modifier.

[0020] Preferably, the mass fraction of the sodium citrate solution is 10-15%.

[0021] Preferably, the blending is ball-milled at a speed of 1200 to 1500 r / min for 2 hours.

[0022] The present invention also provides a method for preparing an amino acid chelated water-soluble fertilizer, comprising the following steps:

[0023] The amino acid chelate type water-soluble fertilizer of the present invention can be obtained by uniformly mixing the raw materials according to the proportion.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] (1) The amino acid chelate water-soluble fertilizer of the present invention uses nitrogen, phosphorus and potassium fertilizers, amino acids, sodium humate, organic matter, alginic acid, whisker regulators, and graphene modifiers. The two are coordinated and synergistic, and the product has a coordinated improvement effect on soil heavy metal improvement and plant quality improvement effect;

[0026] (2) The whisker regulator uses aluminum borate whiskers treated with potassium permanganate to optimize the activity, and then mixed with sodium dodecylbenzene sulfonate solution to form a whisker liquid, which improves the soil structure, increases the air permeability and water retention of the soil, and can provide the nutrients required by plants. The addition of the whisker regulator helps to adjust the pH of the soil, making it more suitable for plant growth;

[0027] (3) Nano-silica liquid is obtained by blending nano-silica modifier, lanthanum nitrate solution, chitosan solution and silane coupling agent KH560, and the nano-silica liquid is used to blend and coordinate the whisker liquid. The whisker-like structure of the whiskers is combined with nano-silica with a high specific surface area. Through the mutual coordination and efficiency adjustment between the raw materials, the soil environment is improved, the fertilizer utilization rate is increased, and the absorption and utilization of water-soluble fertilizers are promoted, thereby improving the fertilizer efficiency of water-soluble fertilizers. In addition, the additives used are environmentally friendly and have little impact on the environment.

[0028] (4) Nano-silica is treated with proton irradiation, mixed with phosphate buffer solution and sodium lignin sulfonate solution, and the raw materials are coordinated to improve the nano-silica together, so that the whisker regulator obtained in the system has a better effect of enhancing the performance of the system. The graphene modifier is prepared by heating the graphene to 210-220°C at a rate of 1-3°C / min, keeping the temperature for 5-10 minutes, and then heating it to 350°C at a rate of 2-5°C / min, and keeping the temperature for 2 minutes to optimize the activity of graphene. The graphene modifier is then fully obtained by ball milling with nano-silica sol, urea and sodium citrate solution. The whisker regulator is coordinated with the graphene modifier. The performance of the product is further improved by the coordination and synergy between the raw materials. DETAILED DESCRIPTION

[0029] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1.

[0031] The amino acid chelate water-soluble fertilizer of this embodiment includes the following raw materials in parts by weight:

[0032] 35 parts of nitrogen, phosphorus and potassium fertilizers, 15 parts of amino acids, 10 parts of sodium humate, 7 parts of whisker regulators, 5 parts of graphene modifiers, 4 parts of organic matter, 3 parts of alginate, and 45 parts of water.

[0033] The nitrogen, phosphorus and potassium fertilizer of this embodiment is prepared by mixing urea, diammonium phosphate and potassium nitrate in a weight ratio of 3:2:1; the amino acid is glutamic acid;

[0034] The organic matter is prepared by mixing 5 parts of livestock manure with 10 parts of water, then stacking at 45°C for 30 days, and finally crushing it in a grinder with a size of 100 mesh to obtain the organic matter.

[0035] The preparation method of the whisker body conditioning agent of this embodiment is:

[0036] S01: The aluminum borate whiskers are first mixed with a sufficient amount of a 5% by mass potassium permanganate solution, then washed and dried, and the dried aluminum borate whiskers and a 2% by mass dodecylbenzene sulfonic acid solution are mixed in a weight ratio of 2:5 to obtain a whisker solution;

[0037] S02: Add 2 parts of nano-silica modifier and 1 part of lanthanum nitrate solution to 4 parts of chitosan solution, then add 2 parts of silane coupling agent KH560 and 3 parts of nano-carbon powder, stir well, and obtain nano-silica liquid;

[0038] S03: The whisker liquid and the nano-silica liquid are mixed in a weight ratio of 4:3 and ball-milled at a speed of 1500 r / min for 2 h. After the ball milling is completed, the mixture is washed with water and dried to obtain a whisker body regulator.

[0039] The mass fraction of the lanthanum nitrate solution in this embodiment is 2%; the mass fraction of the chitosan solution is 4%.

[0040] The preparation method of the nano silicon dioxide modifier of this embodiment is:

[0041] The nano-silica was first treated with proton irradiation at a power of 350 W for 10 minutes. After the irradiation, the irradiated nano-silica agent, sodium lignin sulfonate solution and phosphate buffer solution were fully mixed in a weight ratio of 2:5:3, and finally washed with water and dried to obtain a nano-silica modifier.

[0042] The mass fraction of the sodium lignin sulfonate solution in this example is 10%; the pH value of the phosphate buffer solution is 5.5.

[0043] The preparation method of the graphene modifier of this embodiment is:

[0044] S11: heating the graphene to 210°C at a rate of 1°C / min, keeping the temperature for 5 min, then heating it to 350°C at a rate of 2°C / min, keeping the temperature for 2 min, and finally cooling it to room temperature in air;

[0045] S12: 4 parts of S11 treated graphene, 1 part of nano-silica sol, 2 parts of urea and 4 parts of sodium citrate solution are mixed and ball-milled thoroughly. After the ball-milling is completed, the mixture is washed with water and dried to obtain a graphene modifier.

[0046] The mass fraction of the sodium citrate solution in this embodiment is 10%.

[0047] The blending process of this embodiment is performed at a full milling speed of 1200 r / min for 2 h.

[0048] The method for preparing an amino acid chelated water-soluble fertilizer of the present embodiment comprises the following steps:

[0049] The amino acid chelate type water-soluble fertilizer of the present invention can be obtained by uniformly mixing the raw materials according to the proportion.

[0050] Example 2.

[0051] The amino acid chelate water-soluble fertilizer of this embodiment includes the following raw materials in parts by weight:

[0052] 45 parts of nitrogen, phosphorus and potassium fertilizers, 20 parts of amino acids, 15 parts of sodium humate, 13 parts of whisker regulators, 10 parts of graphene modifiers, 7 parts of organic matter, 5 parts of alginate, and 50 parts of water.

[0053] The nitrogen, phosphorus and potassium fertilizer of this embodiment is prepared by mixing urea, diammonium phosphate and potassium nitrate in a weight ratio of 3:2:1; the amino acid is histidine;

[0054] The organic matter is prepared by mixing 9 parts of livestock manure with 15 parts of water, and then stacking the mixture at 45°C for 30 days. Finally, the mixture is crushed in a grinder to a size of 100 mesh to obtain the organic matter.

[0055] The preparation method of the whisker body conditioning agent of this embodiment is:

[0056] S01: The aluminum borate whiskers are first mixed with a sufficient amount of a 5% by mass potassium permanganate solution, then washed and dried, and the dried aluminum borate whiskers and a 2% by mass dodecylbenzene sulfonic acid solution are mixed in a weight ratio of 2:5 to obtain a whisker solution;

[0057] S02: Add 5 parts of nano-silica modifier and 3 parts of lanthanum nitrate solution to 7 parts of chitosan solution, then add 4 parts of silane coupling agent KH560 and 5 parts of nano-carbon powder, stir well, and obtain nano-silica liquid;

[0058] S03: The whisker liquid and the nano-silica liquid are mixed in a weight ratio of 4:3 and ball-milled at a speed of 1500 r / min for 2 h. After the ball milling is completed, the mixture is washed with water and dried to obtain a whisker body regulator.

[0059] The mass fraction of the lanthanum nitrate solution in this embodiment is 5%; the mass fraction of the chitosan solution is 7%.

[0060] The preparation method of the nano silicon dioxide modifier of this embodiment is:

[0061] The nano-silica was first treated with proton irradiation at a power of 400 W for 15 minutes. After the irradiation, the irradiated nano-silica agent, sodium lignin sulfonate solution and phosphate buffer solution were fully mixed in a weight ratio of 2:5:3, and finally washed with water and dried to obtain a nano-silica modifier.

[0062] The mass fraction of the sodium lignin sulfonate solution in this embodiment is 15%; the pH value of the phosphate buffer solution is 5.5.

[0063] The preparation method of the graphene modifier of this embodiment is:

[0064] S11: heating the graphene to 220°C at a rate of 3°C / min, keeping the temperature for 10 min, then heating it to 350°C at a rate of 5°C / min, keeping the temperature for 2 min, and finally air cooling it to room temperature;

[0065] S12: 7 parts of S11 treated graphene, 3 parts of nano-silica sol, 5 parts of urea and 7 parts of sodium citrate solution are mixed and ball-milled thoroughly. After the ball-milling is completed, the mixture is washed with water and dried to obtain a graphene modifier.

[0066] The mass fraction of the sodium citrate solution in this embodiment is 15%.

[0067] The blending process of this embodiment is performed at a full milling speed of 1500 r / min for 2 h.

[0068] The method for preparing an amino acid chelated water-soluble fertilizer of the present embodiment comprises the following steps:

[0069] The amino acid chelate type water-soluble fertilizer of the present invention can be obtained by mixing the raw materials uniformly according to the proportion.

[0070] Example 3.

[0071] The amino acid chelate water-soluble fertilizer of this embodiment includes the following raw materials in parts by weight:

[0072] 40 parts of nitrogen, phosphorus and potassium fertilizers, 17.5 parts of amino acids, 12.5 parts of sodium humate, 10 parts of whisker regulators, 7.5 parts of graphene modifiers, 5.5 parts of organic matter, 4 parts of alginic acid, and 47.5 parts of water.

[0073] The nitrogen, phosphorus and potassium fertilizer of this embodiment is prepared by mixing urea, diammonium phosphate and potassium nitrate in a weight ratio of 3:2:1; the amino acid is aspartic acid;

[0074] The organic matter is prepared by mixing 7 parts of livestock manure with 12.5 parts of water, then stacking at 45°C for 30 days, and finally crushing it in a grinder with a size of 100 mesh to obtain the organic matter.

[0075] The preparation method of the whisker body conditioning agent of this embodiment is:

[0076] S01: The aluminum borate whiskers are first mixed with a sufficient amount of a 5% by mass potassium permanganate solution, then washed and dried, and the dried aluminum borate whiskers and a 2% by mass dodecylbenzene sulfonic acid solution are mixed in a weight ratio of 2:5 to obtain a whisker solution;

[0077] S02: Add 3.5 parts of nano-silica modifier and 2 parts of lanthanum nitrate solution to 5.5 parts of chitosan solution, then add 3 parts of silane coupling agent KH560 and 4 parts of nano-carbon powder, stir well, and obtain nano-silica liquid;

[0078] S03: The whisker liquid and the nano-silica liquid are mixed in a weight ratio of 4:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a whisker body regulator.

[0079] The mass fraction of the lanthanum nitrate solution in this embodiment is 3.5%; the mass fraction of the chitosan solution is 5.5%.

[0080] The preparation method of the nano silicon dioxide modifier of this embodiment is:

[0081] The nano-silica was first treated with proton irradiation at a power of 370 W for 12.5 min. After the irradiation, the irradiated nano-silica agent, sodium lignin sulfonate solution and phosphate buffer solution were fully mixed in a weight ratio of 2:5:3, and finally washed with water and dried to obtain a nano-silica modifier.

[0082] The mass fraction of the sodium lignin sulfonate solution in this example is 12.5%; the pH value of the phosphate buffer solution is 5.5.

[0083] The preparation method of the graphene modifier of this embodiment is:

[0084] S11: The graphene was first heated to 215°C at a rate of 2°C / min, kept at this temperature for 7.5min, then heated to 350°C at a rate of 3.5°C / min, kept at this temperature for 2min, and finally air-cooled to room temperature;

[0085] S12: 5.5 parts of S11 treated graphene, 2 parts of nano-silica sol, 3.5 parts of urea and 5.5 parts of sodium citrate solution are mixed and ball-milled thoroughly. After the ball-milling is completed, the mixture is washed with water and dried to obtain a graphene modifier.

[0086] The mass fraction of the sodium citrate solution in this embodiment is 12.5%.

[0087] The blending process of this embodiment is performed at a full milling speed of 1350 r / min for 2 h.

[0088] The method for preparing an amino acid chelated water-soluble fertilizer of the present embodiment comprises the following steps:

[0089] The amino acid chelate type water-soluble fertilizer of the present invention can be obtained by mixing the raw materials uniformly according to the proportion.

[0090] Example 4.

[0091] The amino acid chelate water-soluble fertilizer of this embodiment includes the following raw materials in parts by weight:

[0092] 38 parts of nitrogen, phosphorus and potassium fertilizers, 17 parts of amino acids, 12 parts of sodium humate, 8 parts of whisker regulators, 6 parts of graphene modifiers, 5 parts of organic matter, 4 parts of alginate, and 48 parts of water.

[0093] The nitrogen, phosphorus and potassium fertilizer of this embodiment is prepared by mixing urea, diammonium phosphate and potassium nitrate in a weight ratio of 3:2:1; the amino acid is glutamic acid;

[0094] The organic matter is prepared by mixing 6 parts of livestock manure with 12 parts of water, then stacking at 45°C for 30 days, and finally crushing it in a grinder with a size of 100 mesh to obtain the organic matter.

[0095] The preparation method of the whisker body conditioning agent of this embodiment is:

[0096] S01: The aluminum borate whiskers are first mixed with a sufficient amount of a 5% by mass potassium permanganate solution, then washed and dried, and the dried aluminum borate whiskers and a 2% by mass dodecylbenzene sulfonic acid solution are mixed in a weight ratio of 2:5 to obtain a whisker solution;

[0097] S02: Add 3 parts of nano-silica modifier and 2 parts of lanthanum nitrate solution to 5 parts of chitosan solution, then add 3 parts of silane coupling agent KH560 and 4 parts of nano-carbon powder, stir well, and obtain nano-silica liquid;

[0098] S03: The whisker liquid and the nano-silica liquid are mixed in a weight ratio of 4:3 and ball-milled at a ball-milling speed of 1500 r / min for 2 h. After the ball-milling is completed, the mixture is washed with water and dried to obtain a whisker body regulator.

[0099] The mass fraction of the lanthanum nitrate solution in this embodiment is 3%; the mass fraction of the chitosan solution is 5%.

[0100] The preparation method of the nano silicon dioxide modifier of this embodiment is:

[0101] The nano-silica was first treated with proton irradiation at a power of 360 W for 12 minutes. After the irradiation, the irradiated nano-silica agent, sodium lignin sulfonate solution and phosphate buffer solution were fully mixed in a weight ratio of 2:5:3, and finally washed with water and dried to obtain a nano-silica modifier.

[0102] The mass fraction of the sodium lignin sulfonate solution in this example is 12%; the pH value of the phosphate buffer solution is 5.5.

[0103] The preparation method of the graphene modifier of this embodiment is:

[0104] S11: heating the graphene to 215°C at a rate of 2°C / min, keeping the temperature for 6 min, then heating it to 350°C at a rate of 3°C / min, keeping the temperature for 2 min, and finally air cooling it to room temperature;

[0105] S12: 5 parts of S11 treated graphene, 2 parts of nano-silica sol, 3 parts of urea and 5 parts of sodium citrate solution are mixed and ball-milled thoroughly. After the ball-milling is completed, the mixture is washed with water and dried to obtain a graphene modifier.

[0106] The mass fraction of the sodium citrate solution in this embodiment is 12%.

[0107] The blending process of this embodiment is performed at a full milling speed of 1300 r / min and the milling time is 2 h.

[0108] The method for preparing an amino acid chelated water-soluble fertilizer of the present embodiment comprises the following steps:

[0109] The amino acid chelate type water-soluble fertilizer of the present invention can be obtained by uniformly mixing the raw materials according to the proportion.

[0110] Comparative Example 1.

[0111] The difference from Example 3 is that no whisker regulator was added.

[0112] Comparative Example 2.

[0113] The difference from Example 3 is that S01 treatment was not used in the preparation of the whisker body conditioning agent.

[0114] Comparative Example 3.

[0115] The difference from Example 3 is that SO2 treatment was not used in the preparation of the whisker body conditioning agent.

[0116] Comparative Example 4.

[0117] The difference from Example 3 is that in the S01 treatment, the aluminum borate whiskers are not treated with potassium permanganate.

[0118] Comparative Example 5.

[0119] The difference from Example 3 is that no nano-silicon dioxide modifier is added in the SO2 treatment.

[0120] Comparative Example 6.

[0121] The difference from Example 3 is that the nano-silicon dioxide modifier is replaced by nano-silicon dioxide.

[0122] Comparative Example 7.

[0123] The difference from Example 3 is that no graphene modifier is added.

[0124] Comparative Example 8.

[0125] The difference from Example 3 is that the graphene modifier is not treated with S12.

[0126] The products of Examples 1 to 4 and Comparative Examples 1 to 7 were used for corn planting, and fertilized at a dosage of 30 kg / mu. When the corn matured, the yield per mu of corn was tested. The performance measurement results are as follows:

[0127]

[0128] From Examples 1 to 4 and Comparative Examples 1 to 8, it can be concluded that the soil heavy metal Cr reduction rate and per-acre yield of the product of Example 3 of the present invention can achieve coordinated improvements, and the heavy metal improvement of the product and the product quality can achieve coordinated improvements;

[0129] It can be seen from Comparative Examples 1 to 8 and Example 3 that the present invention does not add a whisker body regulator and a graphene modifier, and the performance of the product deteriorates significantly. The two are coordinated and synergistic, and the performance effect of the product is obvious. In addition, the whisker body regulator is not treated with S01, the whisker body regulator is not treated with S02, the aluminum borate whiskers treated with S01 are not treated with potassium permanganate, the nano-silicon dioxide modifier is not added in the S02 treatment, the nano-silicon dioxide modifier is replaced by nano-silicon dioxide, and the graphene modifier is not treated with S12. The performance of the product has a tendency to deteriorate. Only the whisker body regulator and graphene modifier obtained by the method of the present invention have the most significant performance effect of the product, and the effects of other methods are not as obvious as those of the present invention.

[0130] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0131] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. Amino acid chelate water-soluble fertilizer, characterized in that: It includes the following raw materials in parts by weight: 35-45 parts of nitrogen, phosphorus and potassium fertilizers, 15-20 parts of amino acids, 10-15 parts of sodium humate, 7-13 parts of whisker regulators, 5-10 parts of graphene modifiers, 4-7 parts of organic matter, 3-5 parts of alginic acid, and 45-50 parts of water; The preparation method of the whisker body regulator is: S01: The aluminum borate whiskers are first mixed with a sufficient amount of a 5% by mass potassium permanganate solution, then washed and dried, and the dried aluminum borate whiskers and a 2% by mass dodecylbenzene sulfonic acid solution are mixed in a weight ratio of 2:5 to obtain a whisker solution; S02: adding 2 to 5 parts of nano-silica modifier and 1 to 3 parts of lanthanum nitrate solution to 4 to 7 parts of chitosan solution, and then adding 2 to 4 parts of silane coupling agent KH560 and 3 to 5 parts of nano-carbon powder, stirring well to obtain nano-silica liquid; S03: mixing the whisker liquid and the nano-silica liquid in a weight ratio of 4:3, and ball milling the mixture at a speed of 1500 r / min for 2 h. After the ball milling is completed, the mixture is washed with water and dried to obtain a whisker conditioning agent; The preparation method of the graphene modifier is: S11: heating the graphene to 210-220°C at a rate of 1-3°C / min, keeping the temperature for 5-10min, then heating it to 350°C at a rate of 2-5°C / min, keeping the temperature for 2min, and finally air cooling it to room temperature; S12: 4 to 7 parts of S11 treated graphene, 1 to 3 parts of nano-silica sol, 2 to 5 parts of urea and 4 to 7 parts of sodium citrate solution are mixed and ball-milled thoroughly, and after the ball-milling is completed, the mixture is washed with water and dried to obtain a graphene modifier; The preparation method of the nano silicon dioxide modifier is: The nano-silicon dioxide is first treated by proton irradiation, the irradiation power is 350-400W, the irradiation is carried out for 10-15 minutes, and after the irradiation, the irradiated nano-silicon dioxide, sodium lignin sulfonate solution and phosphate buffer solution are fully mixed in a weight ratio of 2:5:3, and finally washed with water and dried to obtain a nano-silicon dioxide modifier.

2. The amino acid chelated water-soluble fertilizer according to claim 1, characterized in that The nitrogen, phosphorus and potassium fertilizer is prepared by mixing urea, diammonium phosphate and potassium nitrate in a weight ratio of 3:2:1; the amino acid is one of glutamic acid, histidine, aspartic acid, proline, valine, alanine and leucine; The organic matter is prepared by mixing 5-9 parts of livestock manure with 10-15 parts of water, and then stacking the mixture at 45°C for 30 days. Finally, the mixture is crushed in a grinder to a size of 100 mesh to obtain the organic matter.

3. The amino acid chelated water-soluble fertilizer according to claim 1, characterized in that: The mass fraction of the lanthanum nitrate solution is 2-5%; the mass fraction of the chitosan solution is 4-7%.

4. The amino acid chelated water-soluble fertilizer according to claim 1, characterized in that: The mass fraction of the sodium lignin sulfonate solution is 10-15%; the pH value of the phosphate buffer solution is 5.

5.

5. The amino acid chelated water-soluble fertilizer according to claim 4, characterized in that: The mass fraction of the sodium citrate solution is 10-15%.

6. The amino acid chelated water-soluble fertilizer according to claim 5, characterized in that: The blending is fully ball-milled at a speed of 1200-1500 r / min for 2 hours.

7. A method for preparing the amino acid chelate water-soluble fertilizer according to any one of claims 1 to 6, characterized in that: The following steps are involved: The raw materials are mixed evenly according to the proportions to obtain amino acid chelated water-soluble fertilizer.

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