Water-soluble fertilizer additive as well as preparation method and use method thereof

Abstract

The invention relates to the technical field of water-soluble fertilizers. In particular to a water-soluble fertilizer additive as well as a preparation method and a use method thereof. The water-soluble fertilizer additive comprises the following components in parts by weight: a preparation A: 80-100 parts of carbonate or bicarbonate; 20 to 30 parts of potassium gluconate; 1-3 parts of sodium linear alkyl benzene sulfonate; 1-3 parts of alkyl phosphate; and a preparation B: 400-500 parts of potassium hydrogen tartrate. The preparation method comprises the following steps: step A1, preparing a preparation A; and step A2, preparing a preparation B. The use method comprises the following steps: step B1, preparing a first solution and a second solution; b2, the soil is irrigated with the first solution, and after two days, the soil is irrigated with the second solution. The water-soluble fertilizer has the advantages that the permeation speed of the water-soluble fertilizer aqueous solution is increased, the water-soluble fertilizer aqueous solution is easier to permeate and diffuse, the supply to roots of crops is improved, and the fertilization efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water-soluble fertilizers.

[0002] Specifically, the invention relates to a water-soluble fertilizer additive and a preparation method and a use method thereof. Background Art

[0003] Water-soluble fertilizer is a type of fertilizer that dissolves in water for fertilization. It has a high nutrient utilization rate and is suitable for the needs of intelligent and automated agriculture. Water-soluble fertilizer additives are often added to water-soluble fertilizers to improve some functions. Existing water-soluble fertilizer additives, such as Chinese patent CN103449933B, disclose a fertilizer additive, a fertilizer composition containing the additive, and its application. Specifically, it relates to a water-soluble fertilizer additive that can be used in drip irrigation fertilization of crops, a water-soluble fertilizer composition containing the additive, and its application. The water-soluble fertilizer additive is composed of the following components, and the content of each component is expressed in parts by weight: urea phosphate: 10 parts; guar gum: 1-2 parts; polyacrylamide: 0.5-1 part; potassium polyacrylate: 0.5-1 part; and polyaspartic acid: 0.1-0.5 parts. The above-mentioned water-soluble fertilizer additive can effectively reduce the phenomenon of dripper clogging when the added water-soluble fertilizer is used in drip irrigation fertilization, and reduce the chance of the obtained water-soluble fertilizer causing "fertilizer aversion" to crops; at the same time, the above-mentioned water-soluble fertilizer additive can effectively solve the problem of low phosphorus fertilizer utilization rate in the obtained water-soluble fertilizer.

[0004] The above technical solution has the following disadvantages: although it improves the problem of low fertilizer utilization rate by promoting the absorption of nutrients by crops, it does not improve the problem that fertilizer is difficult to effectively supply to the roots of crops. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned traditional technology and provide a water-soluble fertilizer additive and its preparation method and use method, so that the water-soluble fertilizer aqueous solution is easier to penetrate and diffuse, improves the supply to the roots of crops, and improves the fertilization efficiency.

[0006] The purpose of the present invention is achieved through the following technical measures:

[0007] A water-soluble fertilizer additive comprising the following components in parts by weight:

[0008] Preparation A: 80-100 parts of carbonate or bicarbonate;

[0009] 20-30 parts of potassium gluconate;

[0010] 1-3 parts of linear alkylbenzene sulfonate sodium;

[0011] 1-3 parts of alkyl phosphate;

[0012] Preparation B: 400-500 parts of potassium hydrogen tartrate.

[0013] As an improvement, formulation A further comprises one or more of the following components in parts by weight:

[0014] 2-3 parts of decyl glucoside;

[0015] 2-4 parts of Cocamidopropyl Betaine.

[0016] As an improvement, formulation B further comprises one or more of the following components in parts by weight:

[0017] 2-4 parts of cocamidopropyl betaine;

[0018] 1-2 parts of dipotassium EDTA;

[0019] 2-5 parts of disodium edetate.

[0020] As an improvement, the carbonate or bicarbonate is one or more of potassium carbonate, potassium bicarbonate, ammonium carbonate or ammonium bicarbonate; the alkyl phosphate is one or more of sodium dodecyl phosphate or sodium hexadecyl phosphate.

[0021] A method for preparing the water-soluble fertilizer additive as described above comprises the following steps:

[0022] Step A1, adding the components of Preparation A into a blender at a stirring speed of 50-150 r / min, a stirring temperature of 20-40° C., and a stirring time of 20-30 min to prepare Preparation A;

[0023] Step A2: Add the components of Preparation B into a blender at a stirring speed of 100-200 r / min, a stirring temperature of 20-40° C., and a stirring time of 20-30 min to obtain Preparation B.

[0024] A method for using the water-soluble fertilizer additive as described above is characterized by comprising the following steps:

[0025] Step B1: adding a water-soluble fertilizer and preparation A to water in a first container and stirring evenly to prepare a first solution, wherein the amount of preparation A used is 1-3% by weight of the water-soluble fertilizer, and the pH value of the water-soluble fertilizer aqueous solution is ≥ 7; adding preparation B to water in a second container and stirring evenly to prepare a second solution, wherein the weight of water in the first solution is ≤ the weight of water in the second solution;

[0026] Step B2: First, irrigate the soil with the first solution, and two days later, irrigate the soil with the second solution.

[0027] As an improvement, in step B2, the irrigation method is drip irrigation.

[0028] As an improvement, in step S2, when dripping the first solution into the soil, the resistance value of the soil at a set horizontal distance from the drip irrigation point is measured, and when the change in the resistance value is greater than the set value, dripping the first solution is stopped.

[0029] As an improvement, the depth at which the resistance value is measured is 5 cm to 30 cm.

[0030] As an improvement, water is drip-irrigated into the soil between the process of drip-irrigating the first solution into the soil and the process of drip-irrigating the second solution into the soil.

[0031] Due to the adoption of the above technical scheme, compared with the prior art, the advantages of the present invention are: carbonate or bicarbonate reacts with potassium hydrogen tartrate to produce carbon dioxide in the soil, creating tiny voids, which loosens the soil, making it more loose and breathable, and increasing the lateral and vertical penetration rates of the water-soluble fertilizer solution. The water-soluble fertilizer solution is easier to penetrate and diffuse, improving the supply to the roots of crops and improving fertilization efficiency; carbon dioxide is the raw material for crop photosynthesis, and potassium can provide nutrients for crops and promote crop growth.

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Attachment Figure 1 It is a schematic diagram of a drip irrigation point and a resistance measurement point in a method for using a water-soluble fertilizer additive of the present invention. DETAILED DESCRIPTION

[0034] Example 1, a water-soluble fertilizer additive, comprising the following components in parts by weight:

[0035] Preparation A: 80 parts of carbonate or bicarbonate. Specifically, the carbonate or bicarbonate is one or more of potassium carbonate, potassium bicarbonate, ammonium carbonate or ammonium bicarbonate.

[0036] 20 parts of potassium gluconate.

[0037] 2 parts of linear alkylbenzene sulfonate sodium

[0038] 2 parts of alkyl phosphate, specifically, the alkyl phosphate is one or more of sodium lauryl phosphate or sodium hexadecyl phosphate.

[0039] 2.5 parts of decyl glucoside.

[0040] 3 parts of Cocamidopropyl Betaine.

[0041] Preparation B: 400 parts of potassium hydrogen tartrate.

[0042] 3 parts of Cocamidopropyl Betaine.

[0043] 1.5 parts of dipotassium ethylenediaminetetraacetate.

[0044] 3.5 parts of disodium edetate.

[0045] The functions of carbonates or bicarbonates are: they are easily soluble in water and can react with potassium hydrogen tartrate to produce carbon dioxide in the soil, creating tiny voids, which loosens the soil, making it more loose and breathable, and increasing the lateral and vertical penetration rates of water-soluble fertilizer solutions. Water-soluble fertilizer solutions are easier to penetrate and diffuse, improving fertilization efficiency; carbon dioxide is the raw material for crop photosynthesis, while potassium or ammonium can provide nutrients for crops and promote crop growth; potassium ions have good conductivity, which can increase the conductivity of water-soluble fertilizer solutions and soil, making it convenient to determine the penetration and diffusion of water-soluble fertilizer solutions by measuring the resistance value of the soil.

[0046] The functions of potassium gluconate are: it is easily soluble in water, easily biodegraded, and has a soil loosening effect; potassium can provide nutrients for crops and promote crop growth; potassium ions have good conductivity, which can improve the conductivity of water-soluble fertilizer solutions and soil, making it convenient to determine the infiltration and diffusion of water-soluble fertilizer solutions by measuring the resistance value of the soil.

[0047] The functions of sodium linear alkylbenzene sulfonate are: being easily soluble in water, being easily biodegradable, and having a soil loosening effect; improving the ability of water-soluble fertilizer aqueous solution to carry carbon dioxide, increasing the duration of carbon dioxide bubbles, and further improving the soil loosening effect; improving the ability of water to penetrate into agglomerated soil. Compared with the second solution prepared by dissolving preparation B in water, the first solution prepared by dissolving water-soluble fertilizer and preparation A in water has a stronger ability to penetrate into agglomerated soil, can delay the reaction of potassium hydrogen tartrate with water-soluble fertilizer, carbonate or bicarbonate in agglomerated soil, is conducive to the horizontal and vertical penetration of the second solution, makes the reaction of carbonate or bicarbonate with potassium hydrogen tartrate more uniform, and avoids excessive consumption of potassium hydrogen tartrate by water-soluble fertilizer.

[0048] The functions of alkyl phosphates are: being easily soluble in water, being easily biodegradable, and having a soil loosening effect; improving the ability of water-soluble fertilizer aqueous solution to carry carbon dioxide, increasing the duration of carbon dioxide bubbles, and further improving the soil loosening effect; improving the ability of water to penetrate into agglomerated soil. Compared with the second solution prepared by dissolving preparation B in water, the first solution prepared by dissolving water-soluble fertilizer and preparation A in water has a stronger ability to penetrate into agglomerated soil, can delay the reaction of potassium hydrogen tartrate with water-soluble fertilizer, carbonate or bicarbonate in agglomerated soil, is conducive to the horizontal and vertical penetration of the second solution, makes the reaction of carbonate or bicarbonate with potassium hydrogen tartrate more uniform, and avoids excessive consumption of potassium hydrogen tartrate by water-soluble fertilizer.

[0049] The functions of decyl glucoside are: being easily soluble in water, being easily biodegradable, and having a soil loosening effect; being beneficial to the dissolution of the components in the first solution, and having a synergistic effect on the effects of the components; and improving the resistance to hard water.

[0050] In preparation A, the functions of cocamidopropyl betaine are: being easily soluble in water, having excellent stability under both acidic and alkaline conditions, being easily biodegradable, having a soil loosening effect, and improving resistance to hard water.

[0051] The function of potassium hydrogen tartrate is: it can react with carbonates or bicarbonates to produce carbon dioxide in the soil, creating tiny gaps, which loosens the soil, making the soil more loose and breathable, and increasing the lateral and vertical penetration rates of water-soluble fertilizer solutions. Water-soluble fertilizer solutions are easier to penetrate and diffuse, improving fertilization efficiency; carbon dioxide is the raw material for crop photosynthesis, while potassium or ammonium can provide nutrients for crops and promote crop growth; it is easily biodegradable and loosens the soil.

[0052] In preparation B, the functions of cocamidopropyl betaine are: being easily soluble in water, having excellent stability under both acidic and alkaline conditions, being easily biodegradable, having a soil loosening effect, and improving resistance to hard water.

[0053] The functions of dipotassium EDTA are: it is easily soluble in water, easily biodegradable, and has a soil loosening effect; it lowers the pH value of the second solution and can react with carbonates or bicarbonates; it reduces the risk of precipitation in the solution and scale formation in the pipe, especially the calcium salts that may be produced by calcium ions reacting with carbonates or bicarbonates.

[0054] The functions of disodium EDTA are: it is easily soluble in water, easily biodegradable, and has a soil loosening effect; it is beneficial to the dissolution of each component in the second solution, and has a synergistic effect on the function of each component; and it improves the ability to resist hard water.

[0055] In this technical solution, carbonates or bicarbonates react with potassium hydrogen tartrate to produce carbon dioxide in the soil, creating tiny voids that loosen the soil, making it more loose and breathable, and increasing the lateral and vertical penetration rates of water-soluble fertilizer solutions. The water-soluble fertilizer solutions are more likely to penetrate and diffuse, thereby improving fertilization efficiency. Carbon dioxide is the raw material for crop photosynthesis, while potassium can provide nutrients for crops and promote crop growth.

[0056] Since the aqueous solution of preparation A is alkaline and the aqueous solution of preparation B is acidic, the pH value of the soil can also be adjusted by adjusting the ratio of preparation A and preparation B.

[0057] Example 2, the preparation method of the water-soluble fertilizer additive as described in Example 1, comprising the following steps:

[0058] Step A1: put the components in Preparation A into a blender at a stirring speed of 50 r / min, a stirring temperature of 20° C., and a stirring time of 20 min to prepare Preparation A.

[0059] Step A2: put the components in Preparation B into a blender at a stirring speed of 100 r / min, a stirring temperature of 20° C., and a stirring time of 20 min to obtain Preparation B.

[0060] During the preparation process, preparation A and preparation B are prepared separately and then stored separately to avoid contact and reaction between the two.

[0061] Example 3, a method for using the water-soluble fertilizer additive as described in Example 1, comprising the following steps:

[0062] Step B1: Add water-soluble fertilizer and preparation A into water in a first container and stir evenly to prepare a first solution, wherein the amount of preparation A used is 1% by weight of the water-soluble fertilizer, and the pH value of the water-soluble fertilizer aqueous solution is ≥7; add preparation B into water in a second container and stir evenly to prepare a second solution, wherein the weight of water in the first solution is ≤ the weight of water in the second solution.

[0063] Specifically, the water-soluble fertilizer can be diammonium nitrate, ammonium bicarbonate, urea, potassium chloride, potassium sulfate or diammonium phosphate.

[0064] The weight of water in the first solution is ≤ the weight of water in the second solution, so that the mass concentration ratio of potassium hydrogen tartrate in the second solution to the carbonate or bicarbonate in the first solution is ≤ the mass ratio of potassium hydrogen tartrate to the carbonate or bicarbonate, which is conducive to the dissolution of potassium hydrogen tartrate and at the same time slows down the change rate of pH value in the soil, protecting crops and soil.

[0065] Step B2: First, irrigate the soil with the first solution, and then irrigate the soil with the second solution two days later. Irrigating the soil with the second solution two days after irrigating the soil with the first solution allows some of the linear sodium alkylbenzene sulfonate and alkyl phosphate to be biodegraded, further delaying the reaction of potassium bitartrate with water-soluble fertilizers, carbonates, or bicarbonates in the agglomerated soil. This facilitates the lateral and vertical penetration of the second solution, allowing the carbonates or bicarbonates to react more evenly with the potassium bitartrate, while also preventing excessive consumption of potassium bitartrate by the water-soluble fertilizers.

[0066] First, a first solution containing carbonates or bicarbonates is irrigated into the soil, and the carbonates or bicarbonates seep into the soil. Then, a second solution containing potassium hydrogen tartrate is irrigated into the soil. After the potassium hydrogen tartrate seeps into the soil, it reacts with the carbonates or bicarbonates to produce carbon dioxide in the soil, creating tiny voids that loosen the soil, making it more loose and breathable, and increasing the lateral and vertical penetration rates of the water-soluble fertilizer solution. The water-soluble fertilizer solution is easier to penetrate and diffuse, thereby improving fertilization efficiency. Carbon dioxide is the raw material for crop photosynthesis, while potassium can provide nutrients for crops and promote crop growth.

[0067] Specifically, the irrigation method is drip irrigation. Drip irrigation has a high water resource utilization rate and facilitates scientific and quantitative management of water and water-soluble fertilizers. When dripping the first solution into the soil, the resistance value of the soil at a set horizontal distance from the drip irrigation point is measured. When the change in the resistance value is greater than the set value, drip irrigation of the first solution is stopped. The resistance value of the soil at the set horizontal distance from the drip irrigation point is measured using existing technologies, such as the quadrupole method, which will not be described in detail here. By measuring the resistance value of the soil at the set horizontal distance from the drip irrigation point, the infiltration and diffusion of the water-soluble fertilizer solution can be determined, facilitating management. The depth at which the resistance value is measured is 5 cm to 30 cm. Preferably, it can be 5 cm, 10 cm, 15 cm, 20 cm, 25 cm, or 30 cm. By measuring the resistance value of the soil at a certain depth, it is convenient to understand the lateral penetration and vertical penetration of the water-soluble fertilizer solution. Between the process of dripping the first solution into the soil and the process of dripping the second solution into the soil, water is dripped into the soil. This step is used to flush the first solution remaining in the drip irrigation pipe, to prevent the second solution from reacting with the first solution in the drip irrigation pipe, and to improve the fertilization effect.

[0068] Example 4, a water-soluble fertilizer additive, comprising the following components in parts by weight:

[0069] Preparation A: 90 parts of carbonate or bicarbonate. Specifically, the carbonate or bicarbonate is one or more of potassium carbonate, potassium bicarbonate, ammonium carbonate or ammonium bicarbonate.

[0070] 25 parts of potassium gluconate.

[0071] 3 parts of linear alkylbenzene sodium sulfonate.

[0072] 3 parts of alkyl phosphate, specifically, the alkyl phosphate is one or more of sodium lauryl phosphate or sodium hexadecyl phosphate.

[0073] 3 parts of decyl glucoside.

[0074] 4 parts of cocamidopropyl betaine.

[0075] Preparation B: 450 parts of potassium hydrogen tartrate.

[0076] 4 parts of cocamidopropyl betaine.

[0077] 2 parts of dipotassium ethylenediaminetetraacetate.

[0078] 5 parts of disodium edetate.

[0079] Example 5, the preparation method of the water-soluble fertilizer additive as described in Example 4, comprising the following steps:

[0080] Step A1: put the components in Preparation A into a blender at a stirring speed of 100 r / min, a stirring temperature of 30° C., and a stirring time of 25 min to prepare Preparation A.

[0081] Step A2: put the components in Preparation B into a blender at a stirring speed of 150 r / min, a stirring temperature of 30° C., and a stirring time of 25 min to obtain Preparation B.

[0082] Example 6, the method for using the water-soluble fertilizer additive as described in Example 4, comprising the following steps:

[0083] Step B1: Add water-soluble fertilizer and preparation A into water in a first container and stir evenly to prepare a first solution, wherein the amount of preparation A used is 2% by weight of the water-soluble fertilizer, and the pH value of the water-soluble fertilizer aqueous solution is ≥7; add preparation B into water in a second container and stir evenly to prepare a second solution, wherein the weight of water in the first solution is ≤ the weight of water in the second solution.

[0084] Specifically, the water-soluble fertilizer can be diammonium nitrate, ammonium bicarbonate, urea, potassium chloride, potassium sulfate or diammonium phosphate.

[0085] Step B2: First, irrigate the soil with the first solution, and two days later, irrigate the soil with the second solution.

[0086] Example 7, a water-soluble fertilizer additive, comprising the following components in parts by weight:

[0087] Preparation A: 100 parts of carbonate or bicarbonate. Specifically, the carbonate or bicarbonate is one or more of potassium carbonate, potassium bicarbonate, ammonium carbonate or ammonium bicarbonate.

[0088] 30 parts of potassium gluconate.

[0089] 1 part of linear alkylbenzene sulfonate.

[0090] 1 part of alkyl phosphate, specifically, the alkyl phosphate is one or more of sodium lauryl phosphate or sodium hexadecyl phosphate.

[0091] 2 parts of decyl glucoside.

[0092] 2 parts of cocamidopropyl betaine.

[0093] Preparation B: 500 parts of potassium hydrogen tartrate.

[0094] 2 parts of cocamidopropyl betaine.

[0095] 1 part of dipotassium EDTA.

[0096] 2 parts of disodium edetate.

[0097] Example 8, the preparation method of the water-soluble fertilizer additive as described in Example 7, comprising the following steps:

[0098] Step A1: put the components in Preparation A into a blender at a stirring speed of 150 r / min, a stirring temperature of 40° C., and a stirring time of 30 min to prepare Preparation A.

[0099] Step A2: put the components in Preparation B into a blender at a stirring speed of 200 r / min, a stirring temperature of 40° C., and a stirring time of 30 min to obtain Preparation B.

[0100] Example 9, the method for using the water-soluble fertilizer additive as described in Example 7, comprising the following steps:

[0101] Step B1: Add water-soluble fertilizer and preparation A into water in a first container and stir evenly to prepare a first solution, wherein the amount of preparation A used is 3% by weight of the water-soluble fertilizer, and the pH value of the water-soluble fertilizer aqueous solution is ≥7; add preparation B into water in a second container and stir evenly to prepare a second solution, wherein the weight of water in the first solution is ≤ the weight of water in the second solution.

[0102] Specifically, the water-soluble fertilizer can be diammonium nitrate, ammonium bicarbonate, urea, potassium chloride, potassium sulfate or diammonium phosphate.

[0103] Step B2: First, irrigate the soil with the first solution, and two days later, irrigate the soil with the second solution.

[0104] In Example 10, the water-soluble fertilizer in the first solution was diammonium nitrate, with a single dosage of 2 kg / mu. The single dosage of Formulation A described in Example 1 was 0.02 kg / mu, diluted with 1000 kg / mu of water. In the second solution, the single dosage of Formulation B described in Example 1 was 0.08 kg / mu, diluted with 1000 kg / mu of water. The drip irrigation rate for the first solution was 500 kg / h / mu, and the drip irrigation rate for the second solution was 500 kg / h / mu. The soil was loess, the temperature was 20-30°C, and the initial moisture content was 60% of the field capacity. Drip irrigation was applied five times, once every seven days.

[0105] When the soil moisture content reaches 60% of the field water holding capacity, the sixth drip irrigation is carried out. The water-soluble fertilizer is diammonium nitrate, the usage rate is 10.5kg / mu, and the water is diluted with 10,000kg / mu. The drip irrigation rate of the water-soluble fertilizer solution is 500kg / h / mu.

[0106] In the sixth drip irrigation, the soil moisture content at a depth of 5 cm to 30 cm and a horizontal distance of 50 cm from the drip irrigation point is measured, and the drip irrigation time required for the moisture content change to be greater than the set value is recorded. Specifically, the set value is 10% of the initial value.

[0107] In Comparative Example 1, diammonium nitrate (DNN) was used as a water-soluble fertilizer at a single application rate of 2.1 kg / mu (approximately 2000 kg / mu) diluted with water. The drip irrigation rate for the water-soluble fertilizer solution was 500 kg / h / mu. The soil was loess, with a temperature of 20-30°C and an initial moisture content of 60% of field capacity. Drip irrigation was performed five times, every seven days.

[0108] When the soil moisture content reaches 60% of the field water holding capacity, the sixth drip irrigation is carried out. The water-soluble fertilizer is diammonium nitrate, the usage rate is 10.5kg / mu, and the water is diluted with 10,000kg / mu. The drip irrigation rate of the water-soluble fertilizer solution is 500kg / h / mu.

[0109] In the sixth drip irrigation, the soil moisture content at a depth of 5 cm to 30 cm and a horizontal distance of 50 cm from the drip irrigation point is measured, and the drip irrigation time required for the moisture content change to be greater than the set value is recorded. Specifically, the set value is 10% of the initial value.

[0110] project Example 10 Comparative Example 1 Depth 5cm 12 hours and 52 minutes 13 hours and 25 minutes Depth 10cm 13 hours and 35 minutes 14 hours and 18 minutes Depth 15cm 14 hours and 55 minutes 16 hours and 1 minute Depth of 20 cm 16 hours and 33 minutes 18 hours and 7 minutes Depth of 25 cm 18 hours and 18 minutes 20 hours and 21 minutes Depth 30cm 20 hours and 32 minutes 22 hours and 59 minutes

[0111] The test shows that the penetration rate of water-soluble fertilizer solution is improved, the water-soluble fertilizer solution is easier to penetrate and diffuse, the supply to the roots of crops is improved, and the fertilization efficiency is increased.

[0112] The above describes several embodiments of the present invention in detail. However, the above contents are only preferred embodiments of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should fall within the scope of the patent coverage of the present invention.

Claims

1. A water-soluble fertilizer additive, characterized in that: It comprises the following components in parts by weight: Preparation A: 80-100 parts of carbonate or bicarbonate; 20-30 parts of potassium gluconate; 1-3 parts of linear alkylbenzene sulfonate sodium; 1-3 parts of alkyl phosphate; Preparation B: 400-500 parts of potassium hydrogen tartrate.

2. The water-soluble fertilizer additive according to claim 1, wherein: Formulation A also includes one or more of the following components in parts by weight: 2-3 parts of decyl glucoside; 2-4 parts of Cocamidopropyl Betaine.

3. The water-soluble fertilizer additive according to claim 1, wherein: Formulation B also includes one or more of the following components in parts by weight: 2-4 parts of cocamidopropyl betaine; 1-2 parts of dipotassium EDTA; 2-5 parts of disodium edetate.

4. The water-soluble fertilizer additive according to claim 1, wherein: The carbonate or bicarbonate is one or more of potassium carbonate, potassium bicarbonate, ammonium carbonate or ammonium bicarbonate; the alkyl phosphate is one or more of sodium lauryl phosphate or sodium hexadecyl phosphate.

5. A method for preparing a water-soluble fertilizer additive as claimed in claim 1, characterized in that: The following steps are involved: Step A1, adding the components of Preparation A into a blender at a stirring speed of 50-150 r / min, a stirring temperature of 20-40° C., and a stirring time of 20-30 min to prepare Preparation A; Step A2: Add the components of Preparation B into a blender at a stirring speed of 100-200 r / min, a stirring temperature of 20-40° C., and a stirring time of 20-30 min to obtain Preparation B.

6. A method for using the water-soluble fertilizer additive as claimed in claim 1, characterized in that: The following steps are involved: Step B1: adding a water-soluble fertilizer and preparation A to water in a first container and stirring evenly to prepare a first solution, wherein the amount of preparation A used is 1-3% by weight of the water-soluble fertilizer, and the pH value of the water-soluble fertilizer aqueous solution is ≥ 7; adding preparation B to water in a second container and stirring evenly to prepare a second solution, wherein the weight of water in the first solution is ≤ the weight of water in the second solution; Step B2: First, irrigate the soil with the first solution, and two days later, irrigate the soil with the second solution.

7. The method for using the water-soluble fertilizer additive according to claim 6, wherein: In step B2, the irrigation method is drip irrigation.

8. The method for using the water-soluble fertilizer additive according to claim 7, wherein: In step S2, when dripping the first solution into the soil, the resistance value of the soil at a set horizontal distance from the drip irrigation point is measured, and when the change in the resistance value is greater than the set value, dripping the first solution is stopped.

9. The method for using the water-soluble fertilizer additive according to claim 8, wherein: The depth at which the resistance value is measured is 5cm-30cm.

10. The method for using the water-soluble fertilizer additive according to claim 7, wherein: Between the process of drip-irrigating the first solution into the soil and the process of drip-irrigating the second solution into the soil, water is drip-irrigated into the soil.

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