Amino acid water-soluble fertilizer capable of preventing fruit cracking and preparation method of amino acid water-soluble fertilizer

Abstract

The invention discloses an amino acid water-soluble fertilizer for preventing fruit cracking and a preparation method, and belongs to the technical field of fertilizers. The amino acid water-soluble fertilizer for preventing fruit cracking is prepared by taking the ternary compound fertilizer, the calcium source, the magnesium source, the compound amino acid, the trace elements and the additive as raw materials, wherein the ternary compound fertilizer is beneficial to promoting healthy growth of apple trees and improving fruit quality; the calcium source is used for providing calcium elements, and fruit cracking caused by calcium deficiency in the later growth period is avoided; the magnesium source is favorable for maintaining the balance of the growth rates of the pulp and the peel and reducing the occurrence of fruit cracking; the compound amino acid can improve the absorption and utilization of the fruit trees on calcium and magnesium elements and effectively reduce the problem of antagonism among the elements, so that the fruit cracking rate is reduced; trace elements are reasonably supplemented, and fruit cracking of fruit trees can be relieved; the additive can enhance calcium absorption of the fruit trees, promote growth of the fruit trees and increase the yield of the fruit trees; the fruit cracking rate is effectively reduced through the combined action of the components, and meanwhile the yield of fruit trees is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of fertilizers, and in particular relates to an amino acid water-soluble fertilizer for preventing fruit cracking and a preparation method thereof. Background Art

[0002] Fruit cracking is a phenomenon that easily occurs during the growth and development of fruits. It occurs on citrus, apple, pear, peach, pomegranate, cherry and other fruit trees. Fruit cracking is a physiological disease that occurs throughout the entire growth and development process from fruit expansion to maturity. Apple is the second largest fruit tree in terms of planting area and output in my country, and fruit cracking seriously restricts the development of the apple planting industry. Calcium is an important component of cell wall synthesis. It can form corresponding calcium salts with pectinase, which can enhance the elasticity of the cell wall, making the peel less likely to crack. However, in the late stage of fruit growth, there is often a problem of low calcium content, and fruit cracking will increase significantly at this time.

[0003] At present, the prevention and control of apple fruit cracking generally adopts measures such as spraying calcium fertilizer, reasonable shaping and pruning, and yield control. However, in actual production, shaping and pruning, yield control and other measures are not ideal in reducing the fruit cracking rate due to the high technical level and difficulty in controlling yield. Although spraying calcium fertilizer is relatively simple and easy to master, it requires strict control of the fertilization period, fertilizer composition and proportion to be effective.

[0004] Therefore, there is an urgent need for a fertilizer that is easy to use and can significantly reduce the apple cracking rate to solve the above technical problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an amino acid water-soluble fertilizer for preventing fruit cracking and a preparation method thereof.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides an amino acid water-soluble fertilizer for preventing fruit cracking, comprising the following raw materials in parts by weight:

[0008] 30-50 parts of triple compound fertilizer, 8-15 parts of calcium source, 8-15 parts of magnesium source, 5-12 parts of compound amino acid, 3-8 parts of trace elements and 5-10 parts of additives;

[0009] The complex amino acids include glycine, phenylalanine, aspartic acid, isoleucine and butyric acid.

[0010] Preferably, the mass ratio of glycine, phenylalanine, aspartic acid, isoleucine and butyric acid is (2-6):(5-12):(1-3):(1-5):(3-7).

[0011] Preferably, the mass ratio of N, P and K in the ternary compound fertilizer is 1:(1-2):(2-4).

[0012] Preferably, the calcium source includes one or more of calcium nitrate, calcium sulfate, calcium acetate, calcium glycinate, and calcium phosphate.

[0013] Preferably, the magnesium source includes one or more of magnesium sulfate, magnesium nitrate, magnesium chloride, and potassium magnesium sulfate.

[0014] Preferably, the trace elements include one or more of ferrous sulfate, copper sulfate, manganese sulfate, zinc sulfate and manganese sulfate.

[0015] Preferably, the additives include lactic acid, acetic acid and citric acid.

[0016] Preferably, the mass ratio of lactic acid, acetic acid and citric acid is (3-7):(2-6):(2-6).

[0017] The present invention also provides a method for preparing the amino acid water-soluble fertilizer for preventing fruit cracking described in the above technical solution, comprising the following steps:

[0018] The calcium source, magnesium source, composite amino acid, trace elements and additives are mixed and heated to obtain a mixture; the obtained mixture and the ternary composite fertilizer are crushed separately and then mixed evenly to obtain the amino acid water-soluble fertilizer for preventing fruit cracking.

[0019] Preferably, the heating temperature is 30-40° C. and the heating time is 30-50 min.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] The invention uses ternary compound fertilizer, calcium source, magnesium source, compound amino acid, trace elements and additives as raw materials to prepare amino acid water-soluble fertilizer for preventing fruit cracking, wherein the ternary compound fertilizer is used to provide nitrogen, phosphorus and potassium required by apples at different growth stages, and is helpful to promote the healthy growth of apple trees and improve the quality of fruits; the calcium source is used to provide calcium elements, and prevent the fruit from cracking due to calcium deficiency in the late growth stage; the magnesium source is helpful to maintain the balance of the growth rate of the pulp and the peel, and reduce the occurrence of fruit cracking; the compound amino acid can chelate the Ca in the fertilizer, and the magnesium source can be used to reduce the occurrence of fruit cracking; the compound amino acid can be used to ... potassium in the apple can be used to 2+ and Mg 2+ While increasing the activity of calcium and magnesium, it effectively reduces the antagonism between elements, improves the absorption and utilization of calcium and magnesium by fruit trees, and can also promote the growth of fruit tree roots and improve the absorption and utilization of calcium in the soil by fruit trees, thereby reducing the fruit cracking rate; reasonable supplementation of trace elements can reduce fruit cracking; additives can enhance the absorption of calcium by fruit trees, promote the growth of fruit trees, and increase the yield of fruit trees; the combined effect of several components effectively reduces the fruit cracking rate and increases the yield of fruit trees.

[0022] The amino acid water-soluble fertilizer for preventing fruit cracking provided by the present invention is a water-soluble fertilizer, which has the advantages of small dosage, convenient use, low use cost, fast crop absorption, and high nutrient utilization rate. The water-soluble fertilizer is a quick-acting fertilizer, which allows growers to see the effect and performance of the fertilizer more quickly. In addition, the application method of the water-soluble fertilizer is very simple. It can be fertilized with irrigation water during irrigation in ways including sprinkler irrigation, drip irrigation, etc., which saves water, fertilizer, and labor. At the same time, since the water-soluble fertilizer can be irrigated with water, the fertilization is extremely uniform, which also lays a solid foundation for improving yield and quality. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with specific implementation methods.

[0025] The embodiment of the present invention provides an amino acid water-soluble fertilizer for preventing fruit cracking, comprising the following raw materials in parts by weight:

[0026] 30-50 parts of triple compound fertilizer, 8-15 parts of calcium source, 8-15 parts of magnesium source, 5-12 parts of compound amino acid, 3-8 parts of trace elements and 5-10 parts of additives;

[0027] The complex amino acids include glycine, phenylalanine, aspartic acid, isoleucine and butyric acid.

[0028] In a preferred embodiment, the amino acid water-soluble fertilizer for preventing fruit cracking includes 30 to 50 parts, preferably 33 to 46 parts, of a ternary compound fertilizer by weight. The ternary compound fertilizer in the present invention is used to provide nitrogen, phosphorus and potassium required by apples at different growth stages, which helps promote the healthy growth of apple trees and improve the quality of fruits.

[0029] In a preferred embodiment, the mass ratio of N, P, and K in the ternary compound fertilizer is 1:(1-2):(2-4). The ternary compound fertilizer with a high potassium content used in the present invention can meet the demand for potassium in the middle and late growth stages of fruit trees, especially in the fruit expansion stage, and can also promote the accumulation of calcium ions, thereby reducing fruit cracking.

[0030] In a preferred embodiment, the amino acid water-soluble fertilizer for preventing fruit cracking includes 8 to 15 parts of calcium source, preferably 10 to 14 parts by weight. Calcium is an important component of cell wall synthesis, and can form corresponding calcium salts with pectinase, which can enhance the elasticity of the cell wall, thereby making the fruit peel less likely to crack. The present invention provides calcium by adding an appropriate amount of calcium source to prevent fruit cracking due to calcium deficiency in the late growth period.

[0031] In a preferred embodiment, the calcium source includes one or more of calcium nitrate, calcium sulfate, calcium acetate, calcium glycinate, and calcium phosphate, preferably one or more of calcium sulfate, calcium acetate, and calcium glycinate.

[0032] In a preferred embodiment, the amino acid water-soluble fertilizer for preventing fruit cracking includes 8 to 15 parts of magnesium source, preferably 10 to 14 parts by weight. Magnesium is related to the level of endogenous plant hormones and affects the coordination of the growth rate of the pulp and the peel. The present invention helps to maintain the balance of the growth rate of the pulp and the peel and reduce the occurrence of fruit cracking by adding an appropriate amount of magnesium source.

[0033] In a preferred embodiment, the magnesium source includes one or more of magnesium sulfate, magnesium nitrate, magnesium chloride, and potassium magnesium sulfate, preferably one or more of magnesium sulfate, magnesium nitrate, and potassium magnesium sulfate.

[0034] In a preferred embodiment, the amino acid water-soluble fertilizer for preventing fruit cracking includes 5 to 12 parts by weight of composite amino acids, preferably 6 to 10 parts by weight. The composite amino acids in the present invention can complex the Ca in the fertilizer. 2+ and Mg 2+ While increasing the activity of calcium and magnesium, it effectively reduces the antagonism between elements, improves the absorption and utilization of calcium and magnesium by fruit trees, promotes the growth of fruit tree roots, and improves the absorption and utilization of calcium in the soil by fruit trees, thereby effectively preventing fruit cracking.

[0035] In a preferred embodiment, the composite amino acid includes glycine, phenylalanine, aspartic acid, isoleucine and butyric acid. The present invention can form a complex with calcium element with stable chemical properties by adding glycine, phenylalanine, aspartic acid, isoleucine and butyric acid at the same time, which is easier to be absorbed by fruit trees, improves the utilization rate of calcium element, reduces the antagonism between elements, and effectively prevents fruit cracking; on the other hand, it can also improve the mobility of calcium element in fruit trees, accelerate the conduction and transportation of calcium element, and then promote the absorption of calcium element by fruit trees, thereby preventing fruit cracking.

[0036] In a preferred embodiment, the mass ratio of glycine, phenylalanine, aspartic acid, isoleucine and butyric acid is (2-6):(5-12):(1-3):(1-5):(3-7), preferably (3-5):(6-10):(1-3):(2-5):(4-7).

[0037] In a preferred embodiment, the amino acid water-soluble fertilizer for preventing fruit cracking includes 3 to 8 parts of trace elements, preferably 4 to 7 parts by weight. Deficiency of trace elements will aggravate the occurrence of fruit cracking. The present invention reduces fruit cracking of fruit trees by reasonably supplementing trace elements.

[0038] In a preferred embodiment, the trace elements include one or more of ferrous sulfate, cupric sulfate, manganese sulfate, zinc sulfate, and manganese sulfate; further preferably, the trace elements include ferrous sulfate, cupric sulfate, manganese sulfate, zinc sulfate, and manganese sulfate in a mass ratio of (4-8):(1-3):(2-6):(3-8):(2-6).

[0039] In a preferred embodiment, the amino acid water-soluble fertilizer for preventing fruit cracking includes 5 to 10 parts of additives, preferably 6 to 9 parts by weight. The additives in the present invention can enhance the absorption of calcium by fruit trees, promote the growth of fruit trees, and increase the yield of fruit trees.

[0040] In a preferred embodiment, the additive includes lactic acid, acetic acid and citric acid. The lactic acid and acetic acid in the present invention can promote the absorption of potassium by fruit trees, while acetic acid can also enhance the absorption of nutrients such as calcium and iron by fruit tree leaves, and citric acid can play a role in complexing Ca in fertilizers. 2+ and Mg 2+ The combined effect of several components reduces the fruit cracking rate of fruit trees.

[0041] In a preferred embodiment, the mass ratio of lactic acid, acetic acid and citric acid is (3-7):(2-6):(2-6), preferably (4-6):(3-5):(3-5).

[0042] The present invention also provides a method for preparing the amino acid water-soluble fertilizer for preventing fruit cracking described in the above technical solution, comprising the following steps:

[0043] The calcium source, magnesium source, composite amino acid, trace elements and additives are mixed and heated to obtain a mixture; the obtained mixture and the ternary composite fertilizer are crushed separately and then mixed evenly to obtain the amino acid water-soluble fertilizer for preventing fruit cracking.

[0044] The invention promotes the complexation between calcium source, magnesium source, trace elements, composite amino acid and additives by heating, reduces the antagonism between the elements, then adds ternary composite fertilizer and mixes evenly, thereby obtaining amino acid water-soluble fertilizer capable of effectively preventing fruit cracking.

[0045] In a preferred embodiment, the heating temperature is 30-40°C and the heating time is 30-50 minutes. The present invention controls the heating temperature and time within the above range to avoid the ineffectiveness of the active ingredients in the additive due to excessively high temperature and excessively long time.

[0046] In a preferred embodiment, the method for using the amino acid water-soluble fertilizer for preventing fruit cracking includes diluting the amino acid water-soluble fertilizer for preventing fruit cracking with water to 500 to 800 times and applying it as flushing or foliar fertilizer, or diluting it with water to 800 to 1000 times and applying it as drip irrigation fertilizer.

[0047] Unless otherwise specified, parts in the embodiments of the present invention represent “parts by weight”.

[0048] Unless otherwise specified, the raw materials in the examples of the present invention were purchased from commercial sources.

[0049] Example 1

[0050] An amino acid water-soluble fertilizer for preventing fruit cracking is composed of the following raw materials in parts by weight:

[0051] 35 parts of ternary compound fertilizer, 11 parts of calcium sulfate, 9 parts of magnesium sulfate, 7 parts of compound amino acids, 4 parts of trace elements and 8 parts of additives;

[0052] The mass ratio of N, P and K in the ternary compound fertilizer is 1:1:2; the complex amino acid is composed of glycine, phenylalanine, aspartic acid, isoleucine and butyric acid in a mass ratio of 3:7:2:3:5; the trace elements are composed of ferrous sulfate, copper sulfate, manganese sulfate, zinc sulfate and manganese sulfate in a mass ratio of 6:1:3:4:2; the additives are composed of lactic acid, acetic acid and citric acid in a mass ratio of 5:3:3.

[0053] The preparation method of the amino acid water-soluble fertilizer for preventing fruit cracking is as follows:

[0054] Calcium sulfate, magnesium sulfate, complex amino acids, trace elements and additives are mixed and heated at 35°C for 40 minutes to obtain a mixture; the obtained mixture and the ternary compound fertilizer are crushed by a crusher respectively, and passed through a 100-mesh sieve, and then all the crushed materials are added to a mixing blender, mixed and stirred at room temperature for 5 minutes to obtain an amino acid water-soluble fertilizer for preventing fruit cracking.

[0055] Example 2

[0056] An amino acid water-soluble fertilizer for preventing fruit cracking is composed of the following raw materials in parts by weight:

[0057] 43 parts of ternary compound fertilizer, 13 parts of calcium glycinate, 12 parts of potassium magnesium sulfate, 10 parts of compound amino acids, 5 parts of trace elements and 7 parts of additives;

[0058] The mass ratio of N, P and K in the triple compound fertilizer is 1:2:3; the compound amino acid is composed of glycine, phenylalanine, aspartic acid, isoleucine and butyric acid in a mass ratio of 4:8:2:3:5; the trace elements are composed of ferrous sulfate, copper sulfate, manganese sulfate, zinc sulfate and manganese sulfate in a mass ratio of 6:2:4:5:3; the additive is composed of lactic acid, acetic acid and citric acid in a mass ratio of 5:3:4;

[0059] The preparation method of the amino acid water-soluble fertilizer for preventing fruit cracking is the same as that in Example 1.

[0060] Example 3

[0061] An amino acid water-soluble fertilizer for preventing fruit cracking is composed of the following raw materials in parts by weight:

[0062] 30 parts of ternary compound fertilizer, 15 parts of calcium sulfate, 8 parts of magnesium nitrate, 5 parts of compound amino acids, 3 parts of trace elements and 5 parts of additives;

[0063] The mass ratio of N, P and K in the triple compound fertilizer is 1:1:2; the compound amino acid is composed of glycine, phenylalanine, aspartic acid, isoleucine and butyric acid in a mass ratio of 6:12:1:2:5; the trace elements are composed of ferrous sulfate, copper sulfate, manganese sulfate, zinc sulfate and manganese sulfate in a mass ratio of 6:1:3:5:4; the additive is composed of lactic acid, acetic acid and citric acid in a mass ratio of 4:5:3;

[0064] The preparation method of the amino acid water-soluble fertilizer for preventing fruit cracking is the same as that in Example 1.

[0065] Example 4

[0066] An amino acid water-soluble fertilizer for preventing fruit cracking is composed of the following raw materials in parts by weight:

[0067] 50 parts of ternary compound fertilizer, 15 parts of calcium glycinate, 10 parts of magnesium sulfate, 12 parts of compound amino acids, 6 parts of trace elements and 10 parts of additives;

[0068] The mass ratio of N, P and K in the ternary compound fertilizer is 1:1:3; the compound amino acid is composed of glycine, phenylalanine, aspartic acid, isoleucine and butyric acid in a mass ratio of 2:12:3:2:6; the trace elements are composed of ferrous sulfate, copper sulfate, manganese sulfate, zinc sulfate and manganese sulfate in a mass ratio of 4:2:6:8:3; the additive is composed of lactic acid, acetic acid and citric acid in a mass ratio of 7:2:4;

[0069] The preparation method of the amino acid water-soluble fertilizer for preventing fruit cracking is the same as that in Example 1.

[0070] Example 5

[0071] An amino acid water-soluble fertilizer for preventing fruit cracking is composed of the following raw materials in parts by weight:

[0072] 38 parts of ternary compound fertilizer, 14 parts of calcium acetate, 12 parts of potassium magnesium sulfate, 11 parts of compound amino acids, 7 parts of trace elements and 8 parts of additives;

[0073] The mass ratio of N, P and K in the ternary compound fertilizer is 1:1:4; the compound amino acid is composed of glycine, phenylalanine, aspartic acid, isoleucine and butyric acid in a mass ratio of 5:9:3:3:4; the trace elements are composed of ferrous sulfate, copper sulfate, manganese sulfate, zinc sulfate and manganese sulfate in a mass ratio of 7:2:4:6:6; the additive is composed of lactic acid, acetic acid and citric acid in a mass ratio of 3:3:3;

[0074] The preparation method of the amino acid water-soluble fertilizer for preventing fruit cracking is the same as that in Example 1.

[0075] Comparative Example 1

[0076] The difference from Example 2 is that the composite amino acid is omitted, and the rest is the same as Example 2.

[0077] Comparative Example 2

[0078] The difference from Example 2 is that the additive is omitted, and the rest is the same as Example 2.

[0079] Comparative Example 3

[0080] The difference from Example 2 is that the composite amino acid consists of glycine, phenylalanine and aspartic acid in a mass ratio of 3:10:4, and the rest is the same as Example 2.

[0081] Comparative Example 4

[0082] The difference from Example 2 is that the composite amino acid consists of phenylalanine, isoleucine and alanine in a mass ratio of 7:4:6, and the rest is the same as Example 2.

[0083] Comparative Example 5

[0084] The difference from Example 2 is that the additive consists of lactic acid and acetic acid in a mass ratio of 1:1, and the rest is the same as Example 2.

[0085] Comparative Example 6

[0086] The difference from Example 2 is that the additive consists of lactic acid and citric acid in a mass ratio of 1:1, and the rest is the same as Example 2.

[0087] The experiment was conducted in Dalian Lushunkou District from 2023 to 2024. The soil type was brown soil, the pH value of the topsoil was 7.9, the organic matter was 14.6 g / kg, the available potassium was 2.27 g / kg, the available phosphorus was 1.05 g / kg, and the alkaline nitrogen was 1.03 g / kg. The test object was Red Fuji apple, and the test orchard was 0.3 hm 2 There are 88 fruit trees in 4 rows, with a row spacing of 4×6m and a tree age of 12 years. The 88 fruit trees are divided into 11 groups.

[0088] Fertilization scheme: The water-soluble fertilizers in Examples 1 to 5 and Comparative Examples 1 to 6 were diluted 800 times respectively, and sprayed on the leaves and fruit surfaces, and weeding was carried out normally during the period. The spraying time was 15 days after the full flowering period, and the apples began to set fruits. The spraying was carried out every 10 days, and a total of 3 times. After the apples matured, the total number of fruits and the number of cracked fruits were counted, and the cracking rate was calculated. The results are shown in Table 1.

[0089] Table 1 Fruit cracking rate of Examples 1 to 5 and Comparative Examples 1 to 6

[0090] Number of cracked fruits Total number of fruits Fruit cracking rate / % Example 1 125 7822 1.60 Example 2 115 8026 1.47 Example 3 126 7916 1.59 Example 4 129 8275 1.56 Example 5 123 8193 1.50 Comparative Example 1 356 7840 4.54 Comparative Example 2 255 7915 3.22 Comparative Example 3 228 7809 2.92 Comparative Example 4 243 7882 3.08 Comparative Example 5 198 7937 2.49 Comparative Example 6 187 7895 2.37

[0091] It can be seen from Table 1 that the amino acid water-soluble fertilizer for preventing fruit cracking provided by the present invention can effectively reduce the fruit cracking rate of apples, and the fruit cracking rate can be as low as 1.47%, which is significantly reduced compared with the control example, and the total number of fruits is also increased, indicating that the amino acid water-soluble fertilizer for preventing fruit cracking provided by the present invention can enhance the absorption of elements such as calcium and magnesium by fruit trees, prevent fruit cracking, and at the same time can promote the growth of fruit trees and increase the yield of fruit trees.

[0092] The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An amino acid water-soluble fertilizer for preventing fruit cracking, characterized in that: The invention comprises the following raw materials in parts by weight: 30-50 parts of triple compound fertilizer, 8-15 parts of calcium source, 8-15 parts of magnesium source, 5-12 parts of compound amino acid, 3-8 parts of trace elements and 5-10 parts of additives; The complex amino acids include glycine, phenylalanine, aspartic acid, isoleucine and butyric acid.

2. The amino acid water-soluble fertilizer for preventing fruit cracking according to claim 1, characterized in that: The mass ratio of glycine, phenylalanine, aspartic acid, isoleucine and butyric acid is (2-6): (5-12): (1-3): (1-5): (3-7).

3. The amino acid water-soluble fertilizer for preventing fruit cracking according to claim 1, characterized in that: The mass ratio of N, P and K in the ternary compound fertilizer is 1:(1-2):(2-4).

4. The amino acid water-soluble fertilizer for preventing fruit cracking according to claim 1, characterized in that: The calcium source includes one or more of calcium nitrate, calcium sulfate, calcium acetate, calcium glycinate, and calcium phosphate.

5. The amino acid water-soluble fertilizer for preventing fruit cracking according to claim 1, characterized in that: The magnesium source includes one or more of magnesium sulfate, magnesium nitrate, magnesium chloride, and potassium magnesium sulfate.

6. The amino acid water-soluble fertilizer for preventing fruit cracking according to claim 1, characterized in that: The trace elements include one or more of ferrous sulfate, copper sulfate, manganese sulfate, zinc sulfate and manganese sulfate.

7. The amino acid water-soluble fertilizer for preventing fruit cracking according to claim 1, characterized in that: The additives include lactic acid, acetic acid and citric acid.

8. The amino acid water-soluble fertilizer for preventing fruit cracking according to claim 7, characterized in that: The mass ratio of the lactic acid, acetic acid and citric acid is (3-7):(2-6):(2-6).

9. The method for preparing the amino acid water-soluble fertilizer for preventing fruit cracking according to any one of claims 1 to 8, characterized in that: The following steps are involved: The calcium source, magnesium source, composite amino acid, trace elements and additives are mixed and heated to obtain a mixture; the obtained mixture and the ternary composite fertilizer are crushed separately and then mixed evenly to obtain the amino acid water-soluble fertilizer for preventing fruit cracking.

10. The preparation method according to claim 9, characterized in that: The heating temperature is 30-40° C. and the heating time is 30-50 min.