A plant growth regulator containing gibberellic acid and preparation method thereof

Abstract

The present application relates to the field of growth regulators, and specifically discloses a plant growth regulator containing gibberellic acid and a preparation method thereof. A plant growth regulator containing gibberellic acid and a preparation method thereof include the following raw materials in parts by weight: 4-40 parts of gibberellic acid; 1-40 parts of benzylaminopurine; 30-100 parts of ethanol; 60-180 parts of cosolvents; 30-80 parts of surfactants; 5-15 parts of regulating components; 704-750 parts of propylene glycol dibutyl ether. Its preparation method includes the following steps: S1, weighing gibberellic acid, benzylaminopurine, ethanol, cosolvents, surfactants, regulating components and propylene glycol dibutyl ether, mixing them uniformly to obtain a primary mixture; S2, vacuum drying the primary mixture, and obtaining a plant growth regulator after powdering. The present application has the effect of reducing the migration amount of gibberellic acid in the soil.

Description

Technical Field

[0001] The present application relates to the field of growth regulators, and in particular to a plant growth regulator containing gibberellic acid and a preparation method thereof. Background Art

[0002] Growth regulators are chemical substances that affect plant growth, flowering, fruiting, and other biological processes by regulating internal physiological processes. Growth regulators can be divided into two categories: plant hormones and growth promoters. Plant hormones are naturally occurring substances in plants, including auxins, gibberellic acid, cytokinins, and abscisic acid. They influence plant growth and development by regulating biological processes such as cell division, cell elongation, and cell differentiation.

[0003] Among them, gibberellic acid is a natural organic acid with multiple biological activities. It can promote plant cell division, increase cell number, and thus increase plant volume and yield.

[0004] Gibberellic acid can enter the soil through precipitation and intermittent irrigation and migrate in the soil. When gibberellic acid migrates to the soil aeration zone and aquifers, it will pollute groundwater. The human body will ingest gibberellic acid through drinking water and food. When the human body ingests gibberellic acid, the endocrine system is affected and the content of nitrosamines in the body increases, which can cause cancer in severe cases. Summary of the Invention

[0005] In order to reduce the migration of gibberellic acid in the soil, the present application provides a plant growth regulator containing gibberellic acid and a preparation method thereof.

[0006] In the first aspect, the present application provides a plant growth regulator containing gibberellic acid using the following technical solution:

[0007] A plant growth regulator containing gibberellic acid comprises the following raw materials in parts by weight: 4-40 parts of gibberellic acid; 1-40 parts of benzylaminopurine; 30-100 parts of ethanol; 60-180 parts of cosolvent; 30-80 parts of surfactant; 5-15 parts of regulating components; and 704-750 parts of propylene glycol dibutyl ether.

[0008] By adopting the above technical solution, propylene glycol dibutyl ether is used in combination with gibberellic acid, and the propylene glycol dibutyl ether is absorbed and utilized by plants, thereby increasing the permeability of plant cell membranes, promoting the absorption and internal conduction of gibberellic acid, extending the action time of gibberellic acid, improving the utilization rate of gibberellic acid, and reducing the probability of gibberellic acid falling into the soil, thereby reducing the migration amount of gibberellic acid in the soil;

[0009] Propylene glycol dibutyl ether, gibberellic acid, and benzylaminopurine are used in combination. Benzylaminopurine increases the number and quality of flowers, improves the fruit setting rate, and provides space for the full utilization of gibberellic acid. Gibberellic acid and benzylaminopurine work together to promote plant growth and development. Propylene glycol dibutyl ether assists in promoting the absorption of gibberellic acid and benzylaminopurine by plants, further improving the utilization rate of gibberellic acid and reducing the migration of gibberellic acid in the soil.

[0010] Optionally, the regulating component includes a composite adhesive and a support, and the weight ratio of the composite adhesive to the support is 11:(10-33).

[0011] By adopting the above technical solution, during the preparation and use of the growth regulator, part of the loading agent is wrapped by the composite adhesive. After the growth regulator is applied, the composite adhesive adheres the loading agent to the plant. As time goes by, the composite adhesive becomes ineffective, part of the loading agent is exposed, and the gibberellic acid that is not absorbed by the plant is adsorbed on the loading agent. After falling into the soil, the gibberellic acid is not easily separated from the loading agent. The loading agent blocks the migration of gibberellic acid and reduces the amount of gibberellic acid migrating in the soil.

[0012] Optionally, the support is ferrihydrite powder.

[0013] By adopting this technical solution, ferrihydrite powder, due to its large specific surface area and high surface activity, easily absorbs gibberellic acid, which migrates into the ferrihydrite powder. Once the gibberellic acid-loaded ferrihydrite powder falls into the soil, the gibberellic acid is less likely to migrate from the hematite powder into the soil, thereby reducing the migration of gibberellic acid into the soil. Ferrihydrite powder gradually converts into hematite or goethite in the soil, blocking the pores on its surface and further blocking the migration of gibberellic acid, thereby reducing its migration into the soil.

[0014] Optionally, the composite adhesive includes cellulose acetate succinate and polyacrylamide, and the weight ratio of the cellulose acetate succinate to the polyacrylamide is 1:(2-4).

[0015] By adopting the above technical solution, after the growth regulator is applied, cellulose acetate succinate forms a network structure under the action of ultraviolet rays, which adheres gibberellic acid, benzylaminopurine, propylene glycol dibutyl ether, etc. to the plants, making it easier for the plants to absorb gibberellic acid, benzylaminopurine and propylene glycol dibutyl ether, thereby improving the utilization rate of gibberellic acid and reducing the migration of gibberellic acid in the soil; as the polyacrylamide is photodegraded, the carrier is easier to expose, thereby improving the absorption rate of gibberellic acid by the gibberellic acid and reducing the migration of gibberellic acid in the soil.

[0016] Optionally, the preparation of the regulating component includes the following steps: dissolving polyacrylamide in water; adding a carrier and stirring evenly to obtain a mixture; filtering the mixture and centrifuging it, and drying the precipitate to obtain a core material; adding cellulose acetate succinate in acetone and stirring evenly, adding the core material and stirring evenly to obtain a mixture; vacuum drying the mixture and grinding it into powder to obtain the regulating component.

[0017] By adopting the above technical solution, polyacrylamide first wraps the carrier and is then wrapped by cellulose acetate succinate. Cellulose acetate succinate blocks ethanol and polyacrylamide, reducing the probability of separation of polyacrylamide and the carrier. The carrier is doubly wrapped by polyacrylamide and cellulose acetate succinate, which reduces the probability of the carrier adsorbing gibberellic acid during the preparation and dispensing of the growth regulator, facilitates the entry of gibberellic acid into the plant, improves the utilization rate of gibberellic acid, and reduces the migration of gibberellic acid in the soil.

[0018] Optionally, the composite adhesive further comprises chlorinated paraffin, and the weight ratio of the chlorinated paraffin, cellulose acetate succinate and polyacrylamide is (1-2):2:(4-8).

[0019] By adopting the above technical solution, under the action of ultraviolet light, chlorinated paraffin and cellulose acetate succinate are used in combination to form a three-dimensional network viscose structure, thereby improving the adhesion rate of the growth regulator to the plant; compared with cellulose acetate succinate, chlorinated paraffin has a fast photodegradation rate, which increases the exposure rate of the carrier, thereby increasing the adsorption amount of gibberellic acid by the carrier and reducing the migration amount of gibberellic acid in the soil; after falling into the soil, chlorinated paraffin comes into contact with the exposed hematite powder, promoting the pulverization of ferrihydrite into hematite or goethite, blocking the gibberellic acid inside, and reducing the migration amount of gibberellic acid in the soil.

[0020] Optionally, the cosolvent is N-methylpyrrolidone.

[0021] By adopting the above technical solution, N-methyl pyrrolidone, ethanol and propylene glycol dibutyl ether are used in combination to improve the solubility of gibberellic acid, thereby improving the stability of the growth regulator performance.

[0022] Optionally, the surfactant includes fatty alcohol polyoxyethylene ether.

[0023] By adopting the above technical solution, the fatty alcohol polyoxyethylene ether plays the role of emulsification, foaming and wetting, and the fatty alcohol polyoxyethylene ether is used in combination with propylene glycol dibutyl ether to improve the stability of the growth regulator.

[0024] In a second aspect, the present application provides a method for preparing a plant growth regulator containing gibberellic acid using the following technical solution:

[0025] A method for preparing a plant growth regulator containing gibberellic acid comprises the following steps:

[0026] S1, weighing gibberellic acid, benzylaminopurine, ethanol, cosolvent, surfactant, regulating component and propylene glycol dibutyl ether, putting them into a mixer and mixing to obtain a primary mixture;

[0027] S2. The primary mixed material is vacuum dried and sieved to obtain a plant growth regulator.

[0028] The adoption of the technical solution has a simple process, improves the production efficiency of the growth regulator, improves the stability and purity of the production regulator, and thus improves the utilization rate of gibberellic acid.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] 1. Propylene glycol dibutyl ether is used in combination with gibberellic acid. Propylene glycol dibutyl ether is absorbed and utilized by plants, increasing the permeability of plant cell membranes, promoting the absorption and internal conduction of gibberellic acid, extending the action time of gibberellic acid, improving the utilization rate of gibberellic acid, and reducing the probability of excessive gibberellic acid falling into the soil, thereby reducing the migration of gibberellic acid in the soil;

[0031] 2. After the growth regulator is diluted with water, the regulating component increases the viscosity of the system, making it easier for the growth regulator to adhere to the plant and increasing the plant's absorption rate of gibberellic acid. After the growth regulator is applied, the ferrihydrate powder in the regulating component is exposed to ultraviolet light and absorbs the gibberellic acid that has not been absorbed by the plant, reducing the migration of gibberellic acid in the soil.

[0032] 3. Chlorinated paraffin and cellulose acetate succinate are used together to form a three-dimensional network adhesive structure, which improves the adhesion rate of the growth regulator to the plant. After falling into the soil, the chlorinated paraffin comes into contact with the exposed hematite powder, promoting the pulverization of ferrihydrite into hematite or goethite, locking the gibberellic acid inside and reducing the migration of gibberellic acid in the soil.

[0033] 4. Gibberellic acid promotes cell division in plants, increases the number of cells, and thus increases the volume and yield of plants; while benzylaminopurine promotes cell elongation, increases the number and size of buds, promotes the differentiation and development of flower buds, increases the number and quality of flowers, and improves the yield and quality of fruits; the combined use of gibberellic acid and benzylaminopurine can comprehensively promote the growth and development of plants, and increase the fruit set rate and commercial fruit rate. DETAILED DESCRIPTION

[0034] The present application is further described in detail below with reference to the following examples and comparative examples.

[0035] In the following examples, if specific conditions are not specified, the reaction was carried out under conventional conditions or those recommended by the manufacturer. Unless otherwise specified, all raw materials used in the following examples were commercially available. Among them, chlorinated paraffin was chlorinated paraffin 42, with a viscosity (25°C) of 2500 mPa·s; and ferrihydrite powder had a particle size of 400 mesh.

[0036] Preparation Example

[0037] Preparation Example 1

[0038] S1, dissolve 8kg polyacrylamide in 50L water;

[0039] S2, add 10kg of ferrihydrite powder and stir evenly to obtain a mixture;

[0040] S3, filtering the mixture and centrifuging it, drying the precipitate and grinding it to obtain a core material with a particle size of 200 mesh;

[0041] S4, 2 kg of cellulose acetate succinate and 1 kg of chlorinated paraffin were placed in 25 L of acetone and stirred evenly, and then the core material prepared in S3 was added and stirred evenly to obtain a mixture;

[0042] S5. The mixture is vacuum dried at a vacuum drying temperature of 40-50° C. and a vacuum degree of -0.08 MPa. After granulation, the mixture is sieved to obtain a regulating component with a particle size of 1 mm.

[0043] Preparation Example 2-Preparation Example 3

[0044] The difference from Preparation Example 1 is that the addition amount of each material is different, see Table 1 for details.

[0045] Preparation Example 4

[0046] Ferrihydrite was ground into powder with a particle size of 1 mm as a regulating component.

[0047] Preparation Example 5

[0048] The difference from Preparation Example 2 is that: S4, 2 kg of cellulose acetate succinate was added to 25 L of acetone and stirred evenly, and then the core material prepared in S3 was added and stirred evenly to obtain a mixture.

[0049] Preparation Example 6

[0050] The difference from Preparation Example 2 is that: S4, 1 kg of chlorinated paraffin is put into 25 L of acetone and stirred evenly, and then the core material prepared in S3 is added and stirred evenly to obtain a mixture.

[0051] Preparation Example 7

[0052] S1. Grind 10 kg of ferrihydrite powder into a core material with a particle size of 200 mesh;

[0053] S2. Add 2 kg of cellulose acetate succinate and 1 kg of chlorinated paraffin into 25 L of acetone and stir evenly. Then add the core material prepared in S1 and stir evenly to obtain a mixture.

[0054] S3. The mixture is vacuum dried at a vacuum drying temperature of 40-50° C. and a vacuum degree of -0.08 MPa. After granulation, the mixture is sieved to obtain a regulating component with a particle size of 1 mm.

[0055] Preparation Example 8

[0056] S1. Grind 8 kg of polyacrylamide into powder with a particle size of 200 mesh as the core material;

[0057] S2, 2 kg of cellulose acetate succinate and 1 kg of chlorinated paraffin were placed in 25 L of acetone and stirred evenly, and then the core material prepared in S2 was added and stirred evenly to obtain a mixture;

[0058] S3. The mixture is vacuum dried at a vacuum drying temperature of 40-50° C. and a vacuum degree of -0.08 MPa. After granulation, the mixture is sieved to obtain a regulating component with a particle size of 1 mm.

[0059] Table 1 Raw materials for preparation examples (kg)

[0060]

[0061] Example

[0062] Example 1

[0063] S1, weigh 40kg of gibberellic acid, 1kg of benzylaminopurine, 30kg of ethanol, 180kg of N-methylpyrrolidone, 30kg of fatty alcohol, 704kg of propylene glycol dibutyl ether and 15kg of the regulating component prepared by S1, put them into a mixer and mix them, and stir them evenly to obtain a primary mixture;

[0064] S2. The primary mixed material is vacuum dried at low temperature at a temperature of 40-50° C. and a vacuum degree of -0.081 MPa, and ground to obtain a plant growth regulator with a particle size of 40 mesh.

[0065] Example 2-Example 18

[0066] The difference from Example 1 is that the addition amount of each material is different, see Table 2 for details.

[0067] Comparative Example

[0068] Comparative Example 1-Comparative Example 4

[0069] The difference from Example 1 is that the addition amount of each material is different, see Table 2 for details.

[0070] Table 2 Raw materials of Examples and Comparative Examples (kg)

[0071] Performance testing

[0072] Test methods

[0073] 1. Field trials

[0074] (1) Experimental crop: 2-year-old citrus grove, in full bloom on April 20, 2021.

[0075] (2) Test subjects: citrus fruit.

[0076] (3) Test tools and usage

[0077] The test used a Guardian NS-16 backpack manual sprayer with a fan-shaped nozzle, a flow rate of 0.6 L / min, and a working pressure of 0.2 to 0.3 MPa.

[0078] (4) Experimental design and arrangement

[0079] Test agents: plant growth regulators;

[0080] Preparation of spray: The plant growth regulator is dissolved and diluted with water to obtain a spray. The concentration of the plant growth regulator in the spray is 100 mg / L.

[0081] Dosage: Spray 50mL per citrus tree;

[0082] The control group consisted of citrus trees sprayed with an equal amount of water.

[0083] Five cells are set up, and the cell layout is detailed in Table 3.

[0084] Table 3 Cell arrangement

[0085] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 control group

[0086] Application time and frequency:

[0087] The first application of pesticides was on June 10, 2022, followed by applications on June 20 and July 5, and the commercial fruit rate was surveyed on July 10.

[0088] (5) Meteorological data

[0089] On June 10, 2022, it will be cloudy, with a maximum temperature of 29℃, a minimum temperature of 24℃, and a south wind of level 2.

[0090] On June 20, 2022, it will be cloudy, with a maximum temperature of 22℃, a minimum temperature of 21℃, and a northeast wind of level 1.

[0091] On July 10, 2022, it will be cloudy, with a maximum temperature of 34℃, a minimum temperature of 26℃, and a south wind of level 5.

[0092] During the entire application period, the highest temperature was 34°C, the lowest temperature was 19°C, there were 9 rainy days with a rainfall of 201.6 mm, and no abnormal weather occurred.

[0093] (6) Test results

[0094] Survey time and number: A total of 5 surveys were conducted on April 20 (full flowering period), June 9 (before the first application of pesticides), June 15 (after the first application of pesticides), June 25 (after the second application of pesticides) and July 10.

[0095] Survey method: The number of flowers, fruits, deformed fruits and cracked fruits of each fruit tree in each plot.

[0096] Calculate the fruit setting rate and commercial fruit rate:

[0097] Fruit setting rate (%) = (number of fruits set / number of flowers) × 100%;

[0098] Number of commercial fruits = number of set fruits - number of deformed fruits - number of cracked fruits;

[0099] Commercial fruit rate (%) = (number of commercial fruits / number of set fruits) × 100%.

[0100] The arithmetic mean of the test results of the five plots was taken. The test results are shown in Table 4.

[0101] 2. The content of gibberellic acid in soil was determined by the oscillation extraction method in “Study on Detection Technology of 65 Pesticide Residues in Soil” (Wang Xiaofei, Study on Detection Technology of 65 Pesticide Residues in Soil [D]. Chinese Academy of Agricultural Sciences, 2013).

[0102] Sampling time: after application (July 10);

[0103] Sampling point: Apply the same formulation as in the example within 3 m from the drip line of the sampling fruit tree;

[0104] Soil was collected from 20 cm below the drip line of the citrus tree at a depth of 50 cm and tested for gibberellic acid content (mg / kg);

[0105] The test results are detailed in Table 5.

[0106] Table 4 Field test results data table

[0107] Fruit setting rate (%) Commercial fruit rate (%) Example 1 16.4 91.33 Example 2 17.2 94.25 Example 3 16.7 91.64 Comparative Example 1 7.8 76.25 Comparative Example 2 5.9 80.22 Comparative Example 3 13.2 85.67 Comparative Example 4 11.3 86.18 control group 2.3 60.25

[0108] From Example 1, Example 2, and Example 3 and Table 4, it can be seen that by adjusting the addition amounts of gibberellic acid, benzylaminopurine, ethanol, N-methylpyrrolidone, fatty alcohol polyoxyethylene ether, regulating component, and propylene glycol dibutyl ether, the fruit setting rate and commercial fruit rate of citrus trees are improved.

[0109] Combining Example 2 and Comparative Example 1 with Table 4, it can be seen that the addition of gibberellins effectively increases the commercial fruit rate of citrus trees.

[0110] Combining Example 2 and Comparative Example 2 with Table 4, it can be seen that the addition of benzylaminopurine effectively increases the fruit setting rate of citrus trees.

[0111] Combining Example 2 and Comparative Example 3 with Table 4, it can be seen that the addition of the additional components improves the fruit setting rate and commercial fruit rate of citrus trees.

[0112] Combining Example 2 and Comparative Example 4 with Table 4, it can be seen that the addition of propylene glycol dibutyl ether effectively improves the fruit setting rate and commercial fruit rate of citrus trees.

[0113] Combining Example 2 and the control group with Table 4, it can be seen that the growth regulator prepared in the present application has a significant effect on improving the fruit setting rate and commercial fruit rate of plants.

[0114] Table 5 Gibberellic acid migration test results data table

[0115] Gibberellic acid migration amount (mg / kg) Gibberellic acid migration amount (mg / kg) Example 1 0.047 Example 12 0.053 Example 2 0.032 Example 13 0.072 Example 3 0.041 Example 14 0.052 Example 4 0.044 Example 15 0.058 Example 5 0.071 Example 16 0.137 Example 6 0.051 Example 17 0.053 Example 7 0.048 Example 18 0.046 Example 8 0.063 Comparative Example 1 / Example 9 0.048 Comparative Example 2 0.081 Example 10 0.051 Comparative Example 3 0.177 Example 11 0.056 Comparative Example 4 0.073

[0116] From Example 1, Example 2, and Example 3 and Table 4, it can be seen that by adjusting the addition amounts of gibberellic acid, benzylaminopurine, ethanol, N-methylpyrrolidone, fatty alcohol polyoxyethylene ether, regulating component, and propylene glycol dibutyl ether, the solid utilization rate and fixation rate of gibberellic acid are improved, and the migration amount of gibberellic acid in the soil is reduced.

[0117] Combining Examples 2, 4, and 5 with Table 5, it can be seen that as the amount of gibberellic acid added increases, the amount of gibberellic acid migrated in the soil first decreases and then increases. As the amount of gibberellic acid added increases, the amount of gibberellic acid not absorbed by the plant increases, and this portion of gibberellic acid falls to the ground. At this time, the adsorption effect of the regulating component on gibberellic acid has not yet been realized, resulting in the migration of gibberellic acid in the soil due to erosion by rainwater and the like.

[0118] Combining Example 2 and Comparative Example 2 with Table 5, it can be seen that the addition of benzylaminopurine reduces the amount of gibberellic acid migrating into the soil. Benzylaminopurine increases the fruit set rate of citrus trees. Increased fruit set rate on citrus trees increases the demand for gibberellic acid, thereby increasing the utilization rate of gibberellic acid and reducing the probability of excess gibberellic acid being washed into the soil by rainwater, thereby reducing the amount of gibberellic acid migrating into the soil.

[0119] Combining Example 2, Example 6 and Example 7 and Table 5, it can be seen that as the amount of benzylaminopurine added increases, the migration amount of gibberellic acid in the soil first decreases and then increases.

[0120] Combining Example 2 and Comparative Example 3 with Table 5, it can be seen that the addition of the regulating component effectively reduces the migration of gibberellic acid in the soil. The regulating component includes a composite adhesive and ferrihydrite powder, and the composite adhesive includes chlorinated paraffin, cellulose acetate succinate, and polyacrylamide. The chlorinated paraffin, cellulose acetate succinate, and polyacrylamide are coated with the ferrihydrite powder. Under the action of ultraviolet light, the chlorinated paraffin, cellulose acetate succinate, and polyacrylamide are photodegraded, exposing the ferrihydrite powder and absorbing excess gibberellic acid, thereby reducing the migration of gibberellic acid in the soil.

[0121] Combining Example 2, Example 8 and Example 9 with Table 5, it can be seen that as the amount of regulating component added increases, the migration amount of gibberellic acid in the soil first decreases and then increases.

[0122] In combination with Example 2, Example 10 and Example 11 and Table 5, by adjusting the addition amounts of chlorinated paraffin, cellulose acetate succinate, polyacrylamide and ferrihydrite powder in the regulating components, the solid utilization rate and fixation rate of gibberellic acid are improved, and the migration amount of gibberellic acid in the soil is reduced.

[0123] Combining Examples 2 and 12 with Table 5, it can be seen that the addition of a composite adhesive to the regulating component has little effect on the migration of gibberellic acid in the soil. Exposed ferrihydrite powder absorbs some gibberellic acid and benzylaminopurine. After application of the growth regulator, the amount of gibberellic acid and benzylaminopurine absorbed by the plant decreases. Although the migration of gibberellic acid in the soil sampled from the plant treated with Example 12 remained similar compared to the addition of the composite adhesive, the plant's fruit set rate decreased to 11.4%, and the commercial fruit rate decreased to 89.7%.

[0124] Combining Examples 2 and 13 with Table 5, it can be seen that the addition of chlorinated paraffin to the composite adhesive reduces the migration of gibberellic acid in the soil. Chlorinated paraffin reacts with ferrihydrite powder, blocking gibberellic acid and reducing its probability of migration from the ferrihydrite powder.

[0125] Combining Examples 2 and 14 with Table 5, it can be seen that the addition of cellulose acetate succinate to the composite adhesive reduces the migration of gibberellic acid into the soil. The combination of cellulose acetate succinate, chlorinated paraffin, polyacrylamide, and propylene glycol dibutyl ether increases the adhesion of growth regulators to plants, thereby improving the utilization of gibberellic acid and benzylaminopurine, and reducing the amount of gibberellic acid that enters the soil.

[0126] Combining Example 2 and Example 15 with Table 5, it can be seen that the addition of polyacrylamide in the composite adhesive reduces the migration amount of gibberellic acid in the soil.

[0127] Combining Example 2 and Example 16 with Table 5, it can be seen that the addition of ferrihydrite powder effectively reduces the migration amount of gibberellic acid in the soil.

[0128] Combining Example 2 and Comparative Example 4 with Table 5, it can be seen that the addition of propylene glycol dibutyl ether reduced the gibberellic acid content in the soil. Propylene glycol dibutyl ether promoted plant absorption of gibberellic acid, reducing gibberellic acid waste. Less gibberellic acid fell onto the ground, and some of the gibberellic acid that fell into the soil was adsorbed by ferrihydrite powder, further reducing gibberellic acid migration.

[0129] Combining Example 2, Example 17 and Example 18 and Table 5, it can be seen that with the increase in the addition amount of propylene glycol dibutyl ether, the migration amount of gibberellic acid in the soil first decreases and then increases.

[0130] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A plant growth regulator containing gibberellic acid, characterized in that, The invention comprises the following raw materials in parts by weight: 4-40 parts of gibberellic acid; 1-40 parts of benzylaminopurine; 30-100 parts of ethanol; 60-180 parts of cosolvent; 30-80 parts of surfactant; 5-15 parts of regulating components; and 704-750 parts of propylene glycol dibutyl ether. The regulating components comprise a composite adhesive and a carrier, and the weight ratio of the composite adhesive to the carrier is 11:(10-33); the carrier is ferrihydrite powder; the composite adhesive comprises cellulose acetate succinate and polyacrylamide, and the weight ratio of the cellulose acetate succinate to the polyacrylamide is 1:(2-4).

2. A plant growth regulator containing gibberellic acid according to claim 1, characterized in that, The preparation of the regulating component includes the following steps: dissolving polyacrylamide in water; adding a carrier and stirring evenly to obtain a mixture; filtering the mixture and centrifuging it, and drying the precipitate to obtain a core material; adding cellulose acetate succinate in acetone and stirring evenly, adding the core material and stirring evenly to obtain a mixture; vacuum drying the mixture and grinding it into powder to obtain the regulating component.

3. A plant growth regulator containing gibberellic acid according to claim 1, characterized in that, The composite adhesive further comprises chlorinated paraffin, and the weight ratio of the chlorinated paraffin, cellulose acetate succinate and polyacrylamide is (1-2):2:(4-8).

4. A plant growth regulator containing gibberellic acid according to claim 3, characterized in that, The preparation of the regulating component includes the following steps: dissolving polyacrylamide in water; adding a carrier and stirring evenly to obtain a mixture; filtering the mixture and centrifuging it, drying and grinding the precipitate to obtain a core material; adding cellulose acetate succinate and chlorinated paraffin in acetone and stirring evenly; adding the core material and stirring evenly to obtain a mixture; vacuum drying the mixture and grinding it to obtain the regulating component.

5. A plant growth regulator containing gibberellic acid according to claim 1, characterized in that, The cosolvent is N-methylpyrrolidone.

6. A plant growth regulator containing gibberellic acid according to claim 1, characterized in that, The surfactant includes fatty alcohol polyoxyethylene ether.

7. The method for preparing the plant growth regulator containing gibberellic acid according to any one of claims 1 to 6, wherein: The following steps are involved: S1. Weigh gibberellic acid, benzylaminopurine, ethanol, a cosolvent, a surfactant, a regulating component, and propylene glycol dibutyl ether, and mix them uniformly to obtain a primary mixture; S2. The primary mixed material is vacuum dried and powdered to obtain a plant growth regulator.

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