Amino acid water-soluble fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of water-soluble fertilizers, in particular to an amino acid water-soluble fertilizer and a preparation method thereof. The amino acid water-soluble fertilizer is prepared from the following raw materials in parts by weight: 60-80 parts of an amino acid solution, 20-30 parts of a nitrogen-phosphorus-potassium fertilizer, 6-10 parts of filler, 4-6 parts of a fermentation material, 2-4 parts of brown sugar, 2-4 parts of ethylenediaminetetraacetic acid ferric sodium salt and 0.6-0.8 part of a microbial agent. According to the amino acid water-soluble fertilizer, the filler is added in the preparation process of the amino acid water-soluble fertilizer, after balsa wood is soaked with sodium hydroxide, lignin is partially degraded, a honeycomb-shaped porous structure is formed, the purpose of increasing the specific surface area is achieved, and the effect of adsorbing nitrogen and potassium ions can be achieved; and after the microbial inoculum is inoculated, mycelia are planted in pores of the filler and secrete exopolysaccharide to wrap fertilizer particles, so that the effect of reducing leaching loss is achieved, the retention time of the fertilizer in soil is delayed, and the loss rate of the fertilizer is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of water-soluble fertilizers, and specifically provides an amino acid water-soluble fertilizer and a preparation method thereof. Background Art

[0002] Water-soluble fertilizers contain macronutrients such as nitrogen, phosphorus, and potassium, as well as functional substances such as amino acids and humic acids. They have the characteristics of good water solubility and being easily absorbed by crops. They can be applied through drip irrigation, sprinkler irrigation, etc., accurately supplement nutrients, are suitable for crops at all growth stages, and can improve the fertilizer utilization rate.

[0003] In the prior art, water-soluble fertilizers exist in ionic form after dissolving in the soil, which causes them to easily seep downward with water below the root layer and result in loss, affecting the nutrient supply effect of the fertilizer on plant roots. The present invention provides an amino acid water-soluble fertilizer and a preparation method thereof. Summary of the Invention

[0004] The purpose of the present invention is to provide an amino acid water-soluble fertilizer and a preparation method thereof. The amino acid water-soluble fertilizer prepared by the present invention not only has good anti-loss performance but also has excellent yield performance, effectively improving the use performance of the amino acid water-soluble fertilizer.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] In the first aspect, the present invention provides an amino acid water-soluble fertilizer, which includes the following raw materials in parts by weight: 60 - 80 parts of amino acid solution, 20 - 30 parts of nitrogen, phosphorus, and potassium fertilizer, 6 - 10 parts of filler, 4 - 6 parts of fermentation material, 2 - 4 parts of brown sugar, 2 - 4 parts of ferric sodium ethylene diamine tetraacetate, and 0.6 - 0.8 parts of microbial agent.

[0007] Further, the nitrogen, phosphorus, and potassium fertilizer is a mixture of urea, diammonium phosphate, and potassium nitrate, and the mass ratio of urea, diammonium phosphate, and potassium nitrate is 3:2:1.

[0008] Further, the amino acid solution is prepared by the following method: lysine, isoleucine, alanine, aspartic acid, proline, and water are added to a mixer, and the mixer is set to stir at 120 - 160 r / min for 20 - 30 min to obtain the amino acid solution. The mass ratio of lysine, isoleucine, alanine, aspartic acid, proline, and water is 1:(0.6 - 0.8):(1.4 - 1.6):(0.4 - 0.6):(1.2 - 1.4):(6 - 8).

[0009] Further, the raw materials of the fermentation material are selected from chicken manure, cow manure, wheat bran, activated carbon and straw. The mass ratio of chicken manure, cow manure, wheat bran, activated carbon and straw is 1:(2-4):(2-4):(0.6-0.8):(0.2-0.4). Among them, both the activated carbon and the straw are selected as powders with a particle size of 10-20 μm.

[0010] Further, the filler is made of balsa wood, and the balsa wood is pretreated before preparation.

[0011] Further, the pretreatment method of the balsa wood is as follows: the balsa wood is cut and crushed to obtain wood particles with a particle size of 4-10 mm. The wood particles are immersed in a sodium hydroxide solution and soaked for 6-10 h. After the soaking is completed, the wood particles are filtered out, and the wood particles are repeatedly rinsed with deionized water. Then the wood particles are sent into an oven, the oven is set at 40-50 °C, and dried for 2-4 h. The obtained product is ground with a grinding particle size of 4-10 μm to obtain a powder, and the powder is inoculated.

[0012] Further, the inoculation treatment method is as follows: the powder is added into a container, a microbial agent and water are added into the container, the container is sealed, and it is left standing for 7-9 d under the condition of 28-32 °C. After the standing treatment is completed, it is rinsed with deionized water. The obtained product is added into a centrifuge, the centrifuge is set at 6000-8000 r / min for centrifugation for 6-10 min, the precipitate is taken from the centrifuged product, the precipitate is added into an oven, the oven is set at 50-60 °C, and dried for 2-4 h to obtain the filler.

[0013] Further, the microbial agent is selected from a mixture of Polyporus elegans, Trametes hirsuta and Phanerochaete chrysosporium. The mass ratio of Polyporus elegans, Trametes hirsuta and Phanerochaete chrysosporium is 1:(2-4):(0.6-0.8).

[0014] Further, the fermentation material is prepared by the following method: chicken manure and cow manure are sent into a mixer, wheat bran and brown sugar are added into the mixer, the mixer is set at 80-100 r / min for stirring for 8-12 min, then activated carbon and straw are added, and the mixer is set at 300-400 r / min for stirring for 8-12 min to obtain a mixed material. The mixed material is spread out to dry outdoors, and after drying, it is piled up for fermentation. The fermentation time is 23-25 days. When starting fermentation for 3-5 days, turning the pile is carried out every 3-5 days to obtain the fermentation material.

[0015] In a second aspect, the present invention also provides a preparation method of an amino acid water-soluble fertilizer, comprising the following steps:

[0016] S1: Weigh the amino acid solution, nitrogen, phosphorus and potassium fertilizers, fillers, fermentation materials and sodium ferric ethylenediaminetetraacetate as needed and add them into a mixer. Set the mixer to 200-300 r / min and stir for 20-30 min. After stirring, add water to the mixer. The mass of the water is 60-80% of the mass of the amino acid solution. Set the mixer to 400-500 r / min and stir for 30-40 min to obtain a mixed solution.

[0017] S2: The mixed solution is allowed to stand for 4 to 6 days, and then added to the mixer again. The mixer is set at 60 to 80 r / min and stirred for 20 to 30 minutes to obtain an amino acid water-soluble fertilizer.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In the present invention, by adding fillers during the preparation of amino acid water-soluble fertilizers, balsa wood is soaked in sodium hydroxide, and the lignin is partially degraded to form a honeycomb porous structure, thereby achieving the purpose of increasing the specific surface area, and can adsorb nitrogen and potassium ions, and can delay the release of nutrients through capillary action in the honeycomb porous structure. After inoculation of the bacterial agent, the mycelium colonizes in the pores of the filler and secretes extracellular polysaccharides to wrap the fertilizer particles, which reduces the leaching loss, delays the residence time of the fertilizer in the soil, and effectively reduces the loss rate of the fertilizer.

[0020] 2. In the present invention, by adding fermentation materials during the preparation of amino acid water-soluble fertilizers, chicken manure and cow manure are fermented to form humus rich in organic colloids, and the negative charge on its surface can adsorb ammonium nitrogen and potassium ions through ion exchange. The microporous structure of the activated carbon powder further enhances the physical adsorption capacity. During the fermentation process, microorganisms can decompose cellulose in straw, release carbon sources to promote the activity of spontaneous nitrogen-fixing bacteria, and at the same time, the insoluble phosphorus in chicken manure and cow manure can be converted into water-soluble phosphorus that can be absorbed by plants, thereby reducing the loss of ineffective nutrients and achieving the purpose of increasing yield. DETAILED DESCRIPTION

[0021] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 making creative work are within the scope of protection of the present invention.

[0022] It should be noted that the raw materials used in the following examples are all commercially available raw materials.

[0023] Embodiment 1:

[0024] An amino acid water-soluble fertilizer, comprising the following raw materials in parts by weight: 60 parts of amino acid solution, 20 parts of nitrogen-phosphorus-potassium fertilizer, 6 parts of filler, 4 parts of fermentation material, 2 parts of brown sugar, 2 parts of ferric sodium ethylene diamine tetraacetate, and 0.6 part of microbial agent.

[0025] The nitrogen-phosphorus-potassium fertilizer is a mixture of urea, diammonium phosphate and potassium nitrate, and the mass ratio of urea, diammonium phosphate and potassium nitrate is 3:2:1.

[0026] The amino acid solution is prepared by the following method: lysine, isoleucine, alanine, aspartic acid, proline and water are added to a mixer, and the mixer is set to stir at 120 r / min for 20 min to obtain the amino acid solution. The mass ratio of lysine, isoleucine, alanine, aspartic acid, proline and water is 1:0.6:1.4:0.4:1.2:6.

[0027] The raw materials of the fermentation material are chicken manure, cow manure, bran, activated carbon and straw, and the mass ratio of chicken manure, cow manure, bran, activated carbon and straw is 1:2:2:0.6:0.2. Among them, both the activated carbon and the straw are selected as powder materials with a particle size of 10 μm.

[0028] The filler is made of balsa wood, and the balsa wood is pretreated before preparation.

[0029] The pretreatment method of balsa wood is as follows: the balsa wood is cut and crushed to obtain wood particles with a particle size of 4 mm. The wood particles are immersed in a sodium hydroxide solution and soaked for 6 h. After the soaking is completed, the wood particles are filtered out, and the wood particles are repeatedly rinsed with deionized water. Then the wood particles are sent into an oven, and the oven is set at 40 °C for drying treatment for 2 h. The obtained product is ground with a grinding particle size of 4 μm to obtain powder materials, and the powder materials are inoculated.

[0030] The inoculation treatment method is as follows: the powder materials are added to a container, the microbial agent and water are added to the container, the container is sealed, and it is left standing at 28 °C for 7 d. After the standing treatment is completed, it is rinsed with deionized water. The obtained product is added to a centrifuge, and the centrifuge is set to centrifuge at 6000 r / min for 6 min. The precipitate is taken from the centrifuged product, and the precipitate is added to an oven, and the oven is set at 50 °C for drying treatment for 2 h to obtain the filler.

[0031] The microbial agent is a mixture of Polyporus elegans, Trametes hirsuta and Phanerochaete chrysosporium, and the mass ratio of Polyporus elegans, Trametes hirsuta and Phanerochaete chrysosporium is 1:2:0.6.

[0032] The fermented material is prepared by the following method: Chicken manure and cow manure are fed into a mixing machine, and bran and brown sugar are added to the mixing machine. The mixing machine is set to stir at 80 r / min for 8 min, then activated carbon and straw are added. The mixing machine is set to stir at 300 r / min for 8 min to obtain a mixed material. The mixed material is spread out to dry outdoors, and after drying, it is piled up for fermentation. The fermentation time is 23 days. On the 3rd day of starting fermentation, turning the pile is carried out every 3 days to obtain the fermented material.

[0033] A preparation method of an amino acid water-soluble fertilizer, comprising the following steps:

[0034] S1: Weigh amino acid solution, nitrogen-phosphorus-potassium fertilizer, filler, fermented material and sodium ferric ethylenediaminetetraacetate as required and add them to a mixing machine. The mixing machine is set to stir at 200 r / min for 20 min. After completion of stirring, water is added to the mixing machine, and the mass of water is 60% of the mass of the amino acid solution. The mixing machine is set to stir at 400 r / min for 30 min to obtain a mixed liquid;

[0035] S2: The mixed liquid is left to stand for 4 d, then added to the mixing machine again. The mixing machine is set to stir at 60 r / min for 20 min to obtain the amino acid water-soluble fertilizer.

[0036] Example two:

[0037] An amino acid water-soluble fertilizer, comprising the following raw materials by weight: 70 parts of amino acid solution, 25 parts of nitrogen-phosphorus-potassium fertilizer, 8 parts of filler, 5 parts of fermented material, 3 parts of brown sugar, 3 parts of sodium ferric ethylenediaminetetraacetate, 0.7 part of microbial agent.

[0038] The nitrogen-phosphorus-potassium fertilizer is a mixture of urea, diammonium phosphate and potassium nitrate, and the mass ratio of urea, diammonium phosphate and potassium nitrate is 3:2:1.

[0039] The amino acid solution is prepared by the following method: Lysine, isoleucine, alanine, aspartic acid, proline and water are added to a mixing machine. The mixing machine is set to stir at 140 r / min for 25 min to obtain the amino acid solution. The mass ratio of lysine, isoleucine, alanine, aspartic acid, proline and water is 1:0.7:1.5:0.5:1.3:7.

[0040] The raw materials of the fermented material are chicken manure, cow manure, bran, activated carbon and straw, and the mass ratio of chicken manure, cow manure, bran, activated carbon and straw is 1:3:3:0.7:0.3. Among them, both the activated carbon and the straw are selected as powder materials with a particle size of 15 μm.

[0041] The filler is made of balsa wood, and the balsa wood is pretreated before preparation.

[0042] The pretreatment method of balsa wood is as follows: the balsa wood is cut and crushed to obtain wood particles with a particle size of 7 mm. The wood particles are immersed in a sodium hydroxide solution and soaked for 8 h. After the soaking is completed, the wood particles are filtered out, and the wood particles are repeatedly rinsed with deionized water. Then the wood particles are sent into an oven, the oven is set at 45 °C, and dried for 3 h. The obtained product is ground with a grinding particle size of 7 μm to obtain a powder, and the powder is inoculated.

[0043] The inoculation treatment method is as follows: the powder is added into a container, a bacterial agent and water are added into the container, the container is sealed, and left standing at 30 °C for 8 d. After the standing treatment is completed, it is rinsed with deionized water. The obtained product is added into a centrifuge, the centrifuge is set at 7000 r / min and centrifuged for 8 min. The precipitate is taken from the centrifuged product, and the precipitate is added into an oven, the oven is set at 55 °C, and dried for 3 h to obtain a filler.

[0044] The bacterial agent is a mixture of Polyporus elegans, Trametes hirsuta and Phanerochaete chrysosporium, and the mass ratio of Polyporus elegans, Trametes hirsuta and Phanerochaete chrysosporium is 1:3:0.7.

[0045] The fermented material is prepared by the following method: chicken manure and cow manure are sent into a mixer, bran and brown sugar are added into the mixer, the mixer is set at 90 r / min and stirred for 10 min. Then activated carbon and straw are added, and the mixer is set at 350 r / min and stirred for 10 min to obtain a mixed material. The mixed material is spread out to dry outdoors, and after drying, it is piled up for fermentation. The fermentation time is 24 days. On the 4th day when the fermentation starts, the pile is turned over every 4 days to obtain the fermented material.

[0046] A preparation method of an amino acid water-soluble fertilizer includes the following steps:

[0047] S1: Weigh the amino acid solution, nitrogen, phosphorus and potassium fertilizer, filler, fermented material and sodium ferric ethylenediaminetetraacetate as needed and add them into a mixer. The mixer is set at 250 r / min and stirred for 25 min. After the stirring is completed, water is added into the mixer, and the mass of the water is 70% of the mass of the amino acid solution. The mixer is set at 450 r / min and stirred for 35 min to obtain a mixed solution;

[0048] S2: The mixed solution is left standing for 5 d, then added into the mixer again, and the mixer is set at 70 r / min and stirred for 25 min to obtain the amino acid water-soluble fertilizer.

[0049] Example 3:

[0050] An amino acid water-soluble fertilizer includes the following raw materials in parts by weight: 80 parts of amino acid solution, 30 parts of nitrogen, phosphorus and potassium fertilizer, 10 parts of filler, 6 parts of fermented material, 4 parts of brown sugar, 4 parts of sodium ferric ethylenediaminetetraacetate, and 0.8 part of bacterial agent.

[0051] The nitrogen, phosphorus and potassium fertilizer is a mixture of urea, diammonium phosphate and potassium nitrate, and the mass ratio of urea, diammonium phosphate and potassium nitrate is 3:2:1.

[0052] The amino acid solution is prepared by the following method: lysine, isoleucine, alanine, aspartic acid, proline and water are added to a mixer, and the mixer is set to stir at 160 r / min for 30 min to obtain the amino acid solution. The mass ratio of lysine, isoleucine, alanine, aspartic acid, proline and water is 1:0.8:1.6:0.6:1.4:8.

[0053] The raw materials of the fermentation material are chicken manure, cow manure, wheat bran, activated carbon and straw, and the mass ratio of chicken manure, cow manure, wheat bran, activated carbon and straw is 1:4:4:0.8:0.4. Among them, both the activated carbon and the straw are selected as powders with a particle size of 20 μm.

[0054] The filler is made of balsa wood, and the balsa wood is pretreated before preparation.

[0055] The pretreatment method of balsa wood is as follows: the balsa wood is cut and crushed to obtain wood particles with a particle size of 10 mm. The wood particles are immersed in a sodium hydroxide solution and soaked for 10 h. After the soaking is completed, the wood particles are filtered out, and the wood particles are repeatedly rinsed with deionized water. Then the wood particles are sent into an oven, the oven is set at 50 °C, and dried for 4 h. The obtained product is ground with a grinding particle size of 10 μm to obtain a powder, and the powder is inoculated.

[0056] The inoculation treatment method is as follows: the powder is added to a container, the container is added with a microbial agent and water, the container is sealed, and left standing at 32 °C for 9 d. After the standing treatment is completed, it is rinsed with deionized water. The obtained product is added to a centrifuge, the centrifuge is set at 8000 r / min for centrifugation for 10 min, the precipitate is taken from the centrifuged product, the precipitate is added to an oven, the oven is set at 60 °C, and dried for 4 h to obtain the filler.

[0057] The microbial agent is a mixture of Polyporus elegans, Trametes hirsuta and Phanerochaete chrysosporium, and the mass ratio of Polyporus elegans, Trametes hirsuta and Phanerochaete chrysosporium is 1:4:0.8.

[0058] The fermentation material is prepared by the following method: chicken manure and cow manure are sent into a mixer, wheat bran and brown sugar are added to the mixer, the mixer is set to stir at 100 r / min for 12 min, then activated carbon and straw are added, and the mixer is set to stir at 400 r / min for 12 min to obtain a mixed material. The mixed material is spread out to dry outdoors, and after drying, it is piled up for fermentation. The fermentation time is 25 days. On the 5th day when the fermentation starts, the pile is turned over every 5 days to obtain the fermentation material.

[0059] A preparation method of an amino acid water-soluble fertilizer, comprising the following steps:

[0060] S1: Weigh amino acid solution, nitrogen, phosphorus and potassium fertilizer, filler, fermentation material and sodium ferric ethylenediaminetetraacetate as required and add them into a mixer. The mixer is set to stir at 300 r / min for 30 min. After stirring is completed, water is added into the mixer, and the mass of water is 80% of the mass of the amino acid solution. The mixer is set to stir at 500 r / min for 40 min to obtain a mixed solution;

[0061] S2: The mixed solution is allowed to stand for 6 d, and then added into the mixer again. The mixer is set to stir at 80 r / min for 30 min to obtain the amino acid water-soluble fertilizer.

[0062] Comparative Example 1. The difference between this comparative example and Example 1 is that: this comparative example does not contain a bactericide.

[0063] Comparative Example 2. The difference between this comparative example and Example 1 is that: this comparative example does not contain a fermentation material.

[0064] Comparative Example 3. The difference between this comparative example and Example 1 is that: in this comparative example, an equal amount of humic acid is selected to replace the filler.

[0065] Comparative Example 4. The difference between this comparative example and Example 1 is that: this comparative example does not contain a filler.

[0066] Performance test: Perform performance tests on the amino acid water-soluble fertilizers prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4, and record the obtained test data in the following table:

[0067]

[0068] In the performance test, the test method for the loss rate is as follows: Prepare a test barrel with a diameter of 30 cm and a height of 1.5 m. Both the upper and lower ends of the test barrel are open, and a fine filter screen is installed at the bottom position. The test barrel is filled with soil, and the soil is compacted to simulate the state of normal planting soil. Multiple test barrels are tested separately. At a soil depth of 5 cm, the amino acid water-soluble fertilizers prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4 are respectively used for fertilization. The fertilization cycle is 7 days, and the daily fertilization amount is 500 ml. After the first fertilization is completed and after the last fertilization is completed, test the contents of phosphorus, nitrogen and potassium in the liquid discharged from the filter screen below the test barrel, and obtain the test data of the loss rate of the compound fertilizer according to the first test result and the second test result;

[0069] The testing method for the average per mu yield is as follows: multiple tomato planting test fields with an area of ​​5 mu are selected, the planting varieties and planting densities of the test fields are the same, and the multiple test fields are fertilized respectively with the amino acid water-soluble fertilizers prepared in Example 1, Example 2, Example 3, Comparative Example 1, Comparative Example 2, Comparative Example 3 and Comparative Example 4, and the per mu yield is recorded after harvest.

[0070] It can be seen that the loss rate of the amino acid water-soluble fertilizer prepared in Comparative Examples 1, 2, 3, and 4 is higher than that in Examples 1, 2, and 3, and the average per-acre yield of the amino acid water-soluble fertilizer prepared in Comparative Examples 1, 2, 3, and 4 is lower than that in Examples 1, 2, and 3; this shows that: by adding fillers in the preparation process of amino acid water-soluble fertilizers, the lignin is partially degraded after the balsa wood is soaked in sodium hydroxide to form a honeycomb porous structure, thereby achieving the purpose of increasing the specific surface area, and can play a role in adsorbing nitrogen and potassium ions, and can delay the release of nutrients through capillary action in the honeycomb porous structure. After inoculating the bacterial agent, the mycelium colonizes in the pores of the filler, secretes extracellular polysaccharides to wrap the fertilizer particles, plays a role in reducing leaching losses, delays the residence time of the fertilizer in the soil, and effectively reduces the loss rate of the fertilizer;

[0071] By adding fermentation materials during the preparation of amino acid water-soluble fertilizers, chicken manure and cow manure are fermented to form humus rich in organic colloids. The negative charge on its surface can adsorb ammonium nitrogen and potassium ions through ion exchange. The microporous structure of activated carbon powder further enhances the physical adsorption capacity. During the fermentation process, microorganisms can decompose cellulose in straw, release carbon sources and promote the activity of spontaneous nitrogen-fixing bacteria. At the same time, the insoluble phosphorus in chicken manure and cow manure can be converted into water-soluble phosphorus that can be absorbed by plants, reducing the loss of ineffective nutrients and achieving the purpose of increasing yield.

[0072] By comparing and analyzing the relevant data in the table, it can be seen that the amino acid water-soluble fertilizer prepared by the present invention not only has good anti-loss performance, but also has excellent yield performance. This shows that the amino acid water-soluble fertilizer provided by the present invention and the preparation method thereof have a broader market prospect and are more suitable for promotion.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0074] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An amino acid water-soluble fertilizer, characterized in that: The invention comprises the following raw materials in parts by weight: 60 to 80 parts of amino acid solution, 20 to 30 parts of nitrogen, phosphorus and potassium fertilizers, 6 to 10 parts of fillers, 4 to 6 parts of fermentation materials, 2 to 4 parts of brown sugar, 2 to 4 parts of sodium ferric ethylenediaminetetraacetate and 0.6 to 0.8 parts of bacterial agent.

2. The amino acid water-soluble fertilizer according to claim 1, characterized in that The nitrogen, phosphorus and potassium fertilizer is a mixture of urea, diammonium phosphate and potassium nitrate, and the mass ratio of urea, diammonium phosphate and potassium nitrate is 3:2:

1.

3. The amino acid water-soluble fertilizer according to claim 1, characterized in that The amino acid solution is prepared by the following method: lysine, isoleucine, alanine, aspartic acid, proline and water are added into a mixer, and the mixer is set at 120-160 r / min for stirring for 20-30 minutes to prepare the amino acid solution, wherein the mass ratio of lysine, isoleucine, alanine, aspartic acid, proline and water is 1: (0.6-0.8): (1.4-1.6): (0.4-0.6): (1.2-1.4): (6-8).

4. The amino acid water-soluble fertilizer according to claim 1, characterized in that The raw materials of the fermentation material are chicken manure, cow dung, bran, activated carbon and straw, and the mass ratio of chicken manure, cow dung, bran, activated carbon and straw is 1: (2-4): (2-4): (0.6-0.8): (0.2-0.4), wherein the activated carbon and straw are both powdered materials with a particle size of 10-20 μm.

5. The amino acid water-soluble fertilizer according to claim 1, characterized in that: The filler is made of balsa wood, which is pretreated before preparation.

6. The amino acid water-soluble fertilizer according to claim 4, characterized in that: The pretreatment method of balsa wood is as follows: balsa wood is cut and crushed to obtain wood particles, the particle size of the wood particles is 4-10 mm, the wood particles are immersed in a sodium hydroxide solution, and the immersion treatment is 6-10 hours. After the immersion is completed, the wood particles are filtered out, and the wood particles are repeatedly rinsed with deionized water. Then, the wood particles are sent to an oven, the oven is set at 40-50° C., and the drying treatment is carried out for 2-4 hours. The obtained product is ground to a particle size of 4-10 μm to obtain a powder, and the powder is inoculated.

7. The amino acid water-soluble fertilizer according to claim 6, characterized in that: The inoculation method comprises the following steps: adding powder into a container, adding bacterial agent and water into the container, sealing the container, standing at 28-32° C. for 7-9 days, rinsing with deionized water after standing, adding the obtained product into a centrifuge, setting the centrifuge at 6000-8000 r / min for 6-10 minutes, taking a precipitate from the product obtained by centrifugation, adding the precipitate into an oven, setting the oven at 50-60° C., drying for 2-4 hours, and obtaining a filler.

8. The amino acid water-soluble fertilizer according to claim 1, characterized in that: The bacterial agent is a mixture of polyporus flavus, Trametes spp. and Phanerochaete chrysosporium, and the mass ratio of polyporus flavus, Trametes spp. and Phanerochaete chrysosporium is 1:(2-4):(0.6-0.8).

9. The amino acid water-soluble fertilizer according to claim 1, characterized in that: The fermented material is prepared by the following method: chicken manure and cow manure are fed into a mixer, bran and brown sugar are added into the mixer, the mixer is set to 80-100 r / min and stirred for 8-12 min, activated carbon and straw are then added, the mixer is set to 300-400 r / min and stirred for 8-12 min to obtain a mixture, the mixture is spread outdoors to dry, and after drying, it is piled for fermentation, the fermentation time is 23-25 ​​days, and from the 3rd to the 5th day of fermentation, the pile is turned every 3-5 days to obtain the fermented material.

10. A method for preparing the amino acid water-soluble fertilizer according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Weigh the amino acid solution, nitrogen, phosphorus and potassium fertilizers, fillers, fermentation materials and sodium ferric ethylenediaminetetraacetate as needed and add them into a mixer. Set the mixer to 200-300 r / min and stir for 20-30 min. After stirring, add water to the mixer. The mass of the water is 60-80% of the mass of the amino acid solution. Set the mixer to 400-500 r / min and stir for 30-40 min to obtain a mixed solution. S2: The mixed solution is allowed to stand for 4 to 6 days, and then added to the mixer again. The mixer is set at 60 to 80 r / min and stirred for 20 to 30 minutes to obtain an amino acid water-soluble fertilizer.

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