Amino acid fertilizer capable of promoting absorption and preparation method thereof

Abstract

The invention discloses an amino acid fertilizer capable of promoting absorption. The amino acid fertilizer comprises the following components in percentage by weight: 20-40% of compound amino acid coated by microcapsules; 5%-15% of a biological chelating agent; 10%-25% of a coating carrier material; 1%-5% of trace elements in a chelating state; 0.1%-1% of a plant growth regulator; the balance being water and an acceptable carrier; the preparation method comprises the following steps: preparing a stock solution; carrying out trace element chelating treatment; coating the microcapsules; drying and granulating; and adding a regulator and packaging. The absorption-promoting amino acid fertilizer provided by the invention can prolong the effective time of amino acid in soil and reduce nutrient loss; the stability and the absorption utilization rate of trace elements (Fe, Zn and the like) are improved; plant root nutrition channels are effectively activated, and rapid transfer of amino acid and nutrient elements is promoted; the composition has a remarkable growth promoting effect on commercial crops such as vegetables, fruit trees and flowers, and has a wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of amino acid fertilizer, and in particular to an absorption-promoting amino acid fertilizer and a preparation method thereof. BACKGROUND

[0002] Amino acids, as the smallest molecules constituting proteins, are easy to be absorbed by crops, and have the functions of improving the disease resistance of the fertilization object and improving the quality of the fertilized crops. The amino acids can supplement the essential amino acids of plants, stimulate and regulate the rapid growth of plants, promote the growth of plants, and promote the absorption of nutrients. The amino acids can also enhance the metabolic function of plants, improve photosynthesis, promote the development of plant roots, and accelerate the growth and reproduction of plants.

[0003] Traditional amino acid fertilizers have low absorption efficiency and poor stability. After the amino acid fertilizer enters the soil, the nutrients are lost due to passivation or precipitation. SUMMARY

[0004] To solve the above technical problems, the present application aims to provide an absorption-promoting amino acid fertilizer and a preparation method thereof, which have high stability and high absorption rate.

[0005] To achieve the above-mentioned purposes, the present application provides the following technical solutions.

[0006] An absorption-promoting amino acid fertilizer, characterized in that it comprises the following components by weight percentage:

[0007] 20-40% of complex amino acids treated by microcapsule coating;

[0008] 5-15% of biological chelating agents;

[0009] 10-25% of coating carrier materials;

[0010] 1-5% of chelatable trace elements;

[0011] 0.1-1% of plant growth regulators;

[0012] The rest is water and acceptable carriers (such as organic fertilizers).

[0013] Preferably, the complex amino acids at least include glutamic acid, aspartic acid, and glycine.

[0014] Preferably, the coating carrier material is formed by chitosan and hydroxypropyl methyl cellulose.

[0015] Preferably, the chelatable trace elements are selected from one or more of iron, zinc, and manganese.

[0016] A preparation method of an absorption-promoting amino acid fertilizer, comprising the following steps:

[0017] S1, stock solution preparation;

[0018] S2, trace element chelation treatment;

[0019] S3, microcapsule encapsulation;

[0020] S4, Drying and Granulation;

[0021] S5, with added regulators and packaging.

[0022] Preferably, S1 further includes:

[0023] S11, Amino acid dissolution: Weigh glutamic acid and glycine and add them to the reaction vessel according to the ratio; add pure water and control the stirring speed at 300-500 rpm; maintain the solution temperature at 35-40℃ to accelerate dissolution; stir for 15-20 minutes until the amino acids are completely dissolved.

[0024] S12, chelating agent added: slowly add sodium citrate dropwise to the above amino acid solution; maintain the pH value between 5.5 and 6.5, and add a small amount of NaOH to adjust if necessary; continue stirring the reaction for 20 minutes to form a stable amino acid-chelating agent complex system.

[0025] Preferably, S2 further includes:

[0026] S21, Preparation of trace element solution, take FeSO4 β ZnSO4 and MnSO4 are dissolved in pure water in a certain proportion to form a trace element mother liquor; after filtration to remove impurities, it is ready for use.

[0027] S22, element addition and reaction: Slowly add the mother liquor dropwise to the above amino acid-chelate solution; control the interval between each addition to 2 to 3 minutes to prevent incomplete complexation or precipitation; keep the mixture stirred for 40 minutes to ensure that all metal ions are chelated; detect the pH of the final complexation solution and maintain it in the range of 6.0 to 6.8.

[0028] Preferably, S3 further includes:

[0029] S31, Prepare the coating material: Dissolve chitosan in 1% acetic acid solution to form a chitosan colloidal solution; separately, dissolve hydroxypropyl methylcellulose (HPMC) in pure water at 60℃ and stir until a transparent solution is obtained; mix the two in a mass ratio of 1:1 to form a stable composite colloid;

[0030] S32, Coating and Emulsification: The above chelating solution is slowly added to the composite colloidal system; processed in a high-shear emulsification device (speed approximately 8000 rpm) for 5–10 minutes to form a stable emulsion;

[0031] S33, spray drying process: the emulsion is fed into a spray dryer; the inlet air temperature is set to 130-150℃ and the outlet air temperature to 75-85℃; the nozzle pressure and speed are controlled to ensure a particle size distribution of 10-50μm; and the microencapsulated dry powder is collected.

[0032] S4, Drying and Granulation;

[0033] S41, secondary dehumidification and drying: the microcapsule powder enters the low-temperature drying equipment; dehumidification is carried out in an environment below 40℃ for 4 hours to ensure that the product has a stable moisture content of <8%;

[0034] S42, Granulation and sieving: The dried powder is granulated using a 100-120 mesh sieve to remove large particles and clumps, ensuring product uniformity and mixability.

[0035] S5, with added regulators and packaging;

[0036] S51, Activator added, Indoleacetic acid is dissolved in an appropriate amount of ethanol to prepare a mother liquor; Using a low-speed spray system, it is evenly sprayed onto the surface of dry powder; After mixing, the ethanol residue evaporates naturally.

[0037] S52, Packaging: Pack the final product in aluminum foil or composite plastic bags; vacuum seal and store in a dry, cool environment.

[0038] Preferably, the inlet air temperature for the spray drying process is 120–150°C.

[0039] The present invention has the following beneficial effects:

[0040] Microcapsule-encapsulated amino acid structures can prolong the effective time of amino acids in the soil and reduce nutrient loss;

[0041] Bio-chelating agents work synergistically with trace elements to improve the stability and absorption rate of trace elements (Fe, Zn, etc.);

[0042] It effectively activates the nutrient channels in plant roots and promotes the rapid transport of amino acids and nutrients.

[0043] It has a significant growth-promoting effect on cash crops such as vegetables, fruit trees, and flowers, and has broad application prospects. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a flowchart illustrating the preparation method of an amino acid fertilizer that promotes absorption, as proposed in this invention.

[0046] Figure 2 This is the flowchart for step 3.

[0047] Figure 3 This is a flowchart for step 1. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] Example:

[0050] S1, stock solution preparation;

[0051] S11, Amino acid dissolution: Weigh glutamic acid and glycine and add them to the reaction vessel according to the ratio; add pure water and control the stirring speed at 300-500 rpm; maintain the solution temperature at 35-40℃ to accelerate dissolution; stir for 15-20 minutes until the amino acids are completely dissolved.

[0052] S12, chelating agent added: slowly add sodium citrate dropwise to the above amino acid solution; maintain the pH value between 5.5 and 6.5, and add a small amount of NaOH to adjust if necessary; continue stirring the reaction for 20 minutes to form a stable amino acid-chelating agent complex system.

[0053] S2, trace element chelation treatment;

[0054] S21. Preparation of trace element solution: Dissolve FeSO4, ZnSO4, and MnSO4 in pure water in proportion to form trace element mother liquor; filter to remove impurities and set aside.

[0055] Amino acids and trace elements such as Fe, Zn, and Mn form stable complexes with sodium citrate / sodium humate, effectively preventing them from being passivated or precipitated and deactivated in the soil.

[0056] By enhancing the translocation efficiency of trace elements in plant roots through chelation, the absorption rate can be increased by more than 30% (S22). For element addition and reaction, the mother liquor is slowly added dropwise to the above amino acid-chelated solution; the interval between each addition is controlled at 2-3 minutes to prevent incomplete complexation or precipitation; the entire mixture is stirred for 40 minutes to ensure that all metal ions are chelated; the pH of the final complexed solution is monitored and maintained within the range of 6.0-6.8.

[0057] S3, microcapsule encapsulation;

[0058] S31, Prepare the coating material: Dissolve chitosan in 1% acetic acid solution to form a chitosan colloidal solution; separately, dissolve hydroxypropyl methylcellulose (HPMC) in pure water at 60℃ and stir until a transparent solution is obtained; mix the two in a mass ratio of 1:1 to form a stable composite colloid;

[0059] S32, Coating and Emulsification: The above chelating solution is slowly added to the composite colloidal system; processed in a high-shear emulsification device (speed approximately 8000 rpm) for 5–10 minutes to form a stable emulsion;

[0060] S33, spray drying process: the emulsion is fed into a spray dryer; the inlet air temperature is set to 130-150℃ and the outlet air temperature to 75-85℃; the nozzle pressure and speed are controlled to ensure a particle size distribution of 10-50μm; and the microencapsulated dry powder is collected.

[0061] This invention is the first to form a complex system of amino acids and chelating agents, and then encapsulates and microencapsulates the amino acids through a chitosan + HPMC complex to achieve the controlled and sustained release function of nutrients.

[0062] This structure solves the long-standing problem of amino acid fertilizers being "released too quickly and lost too much".

[0063] S4, Drying and Granulation;

[0064] S41, secondary dehumidification and drying: the microcapsule powder enters the low-temperature drying equipment; dehumidification is carried out in an environment below 40℃ for 4 hours to ensure that the product has a stable moisture content of <8%;

[0065] The use of a two-stage drying process combining spray drying and low-temperature dehumidification avoids the degradation of active ingredients by high temperatures, significantly improving the stability of fertilizers during transportation and storage, while simultaneously ensuring both survival and moisture control.

[0066] S42, Granulation and sieving: The dried powder is granulated using a 100-120 mesh sieve to remove large particles and clumps, ensuring product uniformity and mixability.

[0067] S5, with added regulators and packaging;

[0068] S51, Activator added, Indoleacetic acid is dissolved in an appropriate amount of ethanol to prepare a mother liquor; Using a low-speed spray system, it is evenly sprayed onto the surface of dry powder; After mixing, the ethanol residue evaporates naturally.

[0069] Plant growth regulators such as indoleacetic acid can be sprayed onto the fertilizer surface in solution form to avoid loss of activity due to heat treatment. Furthermore, the amount of fertilizer can be adjusted quantitatively according to crop type, thereby improving the intelligent adaptability of the fertilizer.

[0070] S52, Packaging: Pack the final product in aluminum foil or composite plastic bags; vacuum seal and store in a dry, cool environment.

[0071] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of the present invention.

Claims

1. An amino acid fertilizer that promotes absorption, characterized in that, Includes the following components by weight percentage: The compound amino acids, which are microencapsulated, comprise 20%–40% of the total content. 5%–15% biological chelating agent; The coating carrier material is 10%–25%; Chelated trace elements: 1%–5%; Plant growth regulators 0.1%–1%; The remainder consists of water and an acceptable carrier.

2. The amino acid fertilizer for promoting absorption according to claim 1, characterized in that: The compound amino acids include at least glutamic acid, aspartic acid, and glycine.

3. The amino acid fertilizer for promoting absorption according to claim 1, characterized in that: The coating carrier material is formed from chitosan and hydroxypropyl methylcellulose.

4. The amino acid fertilizer for promoting absorption according to claim 1, characterized in that: The chelatable trace element is selected from one or more of iron, zinc, and manganese.

5. A method for preparing an amino acid fertilizer that promotes absorption, characterized in that, Includes the following steps: S1, stock solution preparation; S2, trace element chelation treatment; S3, microcapsule encapsulation; S4, Drying and Granulation; S5, with added regulators and packaging.

6. The preparation method according to claim 5, characterized in that, S1 also includes: S11, amino acid dissolution; S12, chelating agent added.

7. The preparation method according to claim 5, characterized in that, S2 also includes: S21, Preparation of trace element solution; S22, element addition and reaction.

8. The preparation method according to claim 5, characterized in that, S3 also includes: S31, with coating material configured; S32, coating and emulsification; S33, spray drying treatment.

9. The preparation method according to claim 8, characterized in that: The inlet air temperature for the spray drying process is 120–150°C.

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