Wheat seed coating method

Abstract

The invention relates to the technical field of seed coating, and particularly discloses a wheat seed coating method. The wheat seed coating method mainly comprises the following steps: disinfecting wheat seeds to obtain disinfected seeds; pouring the disinfected seeds into a coating solution, stirring, standing, taking out, and drying to obtain coated wheat seeds; the coating solution is mainly prepared from the following raw materials: sodium phosphonic dipeptide, an acetyl hexapeptide-8 derivative, salicylic acid, sorbic acid, sorbitol, polyethylene glycol, a wetting dispersant, trace elements, a bactericide, sodium carboxymethyl starch, Arabic gum and water; the acetyl hexapeptide-8 derivative is obtained by treating acetyl hexapeptide-8 by using astaxanthin and 2-methacryloyloxyethyl phosphorylcholine. The invention further discloses a preparation method of the acetyl hexapeptide-8 derivative. The wheat seed coating method has the characteristics of high germination rate, good growth condition and high yield through mutual cooperation of coating liquid raw materials, is beneficial to germination and growth of coated wheat seeds, and meets market requirements.

Description

Technical Field

[0001] The present application relates to the technical field of seed coating, and more specifically, to a method for coating wheat seeds. Background Art

[0002] Wheat seed coating is a commonly used technology in modern agriculture, which is to wrap a coating layer on the surface of wheat seeds to obtain coated wheat seeds. After the coated wheat seeds are sown and cultivated, the coating layer can slowly release the effective ingredients, improve the seed germination rate, reduce diseases, and promote plant growth and development, which is not only conducive to increasing yields, but also can reduce the use of chemical pesticides, which is of great significance to environmental protection. At present, the coating method of wheat seeds generally adopts soaking the wheat seeds in a coating solution, taking them out, drying them, and obtaining coated wheat seeds. The coating solution often contains film-forming agents, bactericides, trace elements, and water. Compared with wheat seeds that have not been treated with the coating solution, the germination rate can be improved by treating the wheat seeds with the above-mentioned coating solution, but the germination rate is limited and needs to be further improved. Summary of the invention

[0003] In order to improve the germination rate of coated wheat seeds, thereby improving the treatment effect of the coating liquid on the wheat seeds, the present application provides a wheat seed coating method, which adopts the following technical scheme: A wheat seed coating method mainly comprises the following steps: S1. Disinfecting wheat seeds to obtain disinfected seeds; S2, pouring the sterilized seeds into the coating solution, stirring, standing, taking out, and drying to obtain coated wheat seeds; The coating solution is mainly made of the following raw materials in percentage by weight: 2-4% sodium phosphono dipeptide, 1-3% acetyl hexapeptide-8 derivative, 0.1-0.3% salicylic acid, 0.1-0.3% sorbic acid, 1-3% sorbitol, 1-3% polyethylene glycol, 0.1-0.5% wetting dispersant, 0.2-0.6% trace elements, 0.2-0.6% bactericide, 3-5% sodium carboxymethyl starch, 3-5% gum arabic, and the balance is water; the acetyl hexapeptide-8 derivative is obtained by treating acetyl hexapeptide-8 with astaxanthin and 2-methacryloyloxyethyl phosphorylcholine.

[0004] The wheat seed coating method of the present application first disinfects the wheat seeds to obtain disinfected seeds, removes surface bacteria and fungi, reduces the probability of wheat seed diseases, and improves the survival rate. Then the disinfected seeds are treated with a coating solution to obtain coated wheat seeds. The coating solution contacts, covers, penetrates and adheres to the disinfected seeds, and forms a coating layer on the surface of the disinfected seeds. The coating layer protects the disinfected seeds, and the coating solution raw materials are used to cooperate with each other, so that the 4d germination rate of the coated wheat seeds is greater than 63%, the 7d germination rate is greater than 85%, the 15d taproot length is greater than 27cm, the 15d plant height is greater than 45cm, and the yield is greater than 6600kg / ha, showing the characteristics of high germination rate, good growth condition, good stress resistance, and high yield, which is conducive to the germination and growth of coated wheat seeds, improves the quality and planting benefits of coated wheat seeds, and meets market demand.

[0005] The coating solution of the present application adds sodium carboxymethyl starch and gum arabic to the raw materials, which can form a stable protective film on the surface of the disinfected seeds, cooperate with other raw materials to form a coating layer, and utilize the mutual cooperation between them to enhance the firmness of the coating layer and reduce shedding. A wetting dispersant is added to the raw materials to enhance the contact between the disinfected seeds and the coating solution, improve fluidity, and improve the uniformity and stability of the coating layer. Sodium phosphono dipeptide and acetyl hexapeptide-8 derivatives are added to the raw materials, astaxanthin and 2-methacryloyloxyethyl phosphorylcholine are grafted on acetyl hexapeptide-8, and the synergistic effect between them is utilized to enhance the physiological activity of wheat seeds, promote enzyme activity and cell division, accelerate germination, improve germination rate and stress resistance, promote plant growth, and increase yield.

[0006] Optionally, the acetyl hexapeptide-8 derivative is prepared by the following method: Under constant stirring, ethanol and dimethylformamide are mixed, and then acetyl hexapeptide-8 and sodium ethoxide are added and mixed, and then astaxanthin and 2-methacryloyloxyethyl phosphorylcholine are added, and stirred for 20-25 hours, concentrated under reduced pressure, and dried to obtain acetyl hexapeptide-8 derivatives.

[0007] Optionally, the weight ratio of acetyl hexapeptide-8, astaxanthin, and 2-methacryloyloxyethyl phosphorylcholine is (4-6):(1-3):(1-3).

[0008] Acetyl hexapeptide-8 contains multiple amino groups, astaxanthin contains carbon-carbon double bonds, and 2-methacryloyloxyethyl phosphorylcholine contains carbon-carbon double bonds. In an organic system, and under the catalysis of sodium ethoxide, the amino groups in acetyl hexapeptide-8 react with the carbon-carbon double bonds in astaxanthin and the carbon-carbon double bonds in 2-methacryloyloxyethyl phosphorylcholine to achieve grafting and obtain acetyl hexapeptide-8 derivatives. The preparation method of the present application is convenient for controlling the grafting reaction, reducing side reactions, improving purity, ensuring the stability of the preparation of acetyl hexapeptide-8 derivatives and the use effect, and improving the germination rate, growth status and yield of coated wheat seeds.

[0009] Optionally, the weight ratio of acetyl hexapeptide-8, sodium ethoxide, ethanol and dimethylformamide is (4-6):(0.1-0.3):(20-40):(10-30).

[0010] The weight ratio of acetyl hexapeptide-8, sodium ethoxide, ethanol, and dimethylformamide is optimized to control the amount of sodium ethoxide, ethanol, and dimethylformamide added, and to ensure that acetyl hexapeptide-8, astaxanthin, and 2-methacryloyloxyethyl phosphorylcholine are fully in contact and react with each other, thereby ensuring the stability of the preparation of acetyl hexapeptide-8 derivatives and the use effect.

[0011] Optionally, in step S2, the weight ratio of the disinfected seeds to the coating liquid is 1:(3-5).

[0012] The weight ratio of the disinfected seeds and the coating liquid is optimized to control the amount of coating liquid added, reduce the effect of too little coating liquid on the coating uniformity, and reduce the waste caused by too much coating liquid added. When the weight ratio of the disinfected seeds and the coating liquid is selected within the range of 1:(3-5), it can ensure that the coating liquid effectively coats the disinfected seeds and improves the uniformity and stability of the coating layer. In multiple implementation schemes, the weight ratio of the disinfected seeds and the coating liquid is 1:4, and the weight ratio can be set to 1:3, 1:3.5, 1:4.5, 1:5 as needed, but it is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0013] Optionally, in step S2, the stirring treatment time is 10-30 minutes, and the standing treatment time is 1-3 hours.

[0014] The time of the stirring treatment is optimized so that the coating solution and the sterilized seeds are in full contact. The time of the static treatment is also optimized to improve the uniformity and adhesion of the coating, which helps to improve the germination rate and stress resistance of the coated wheat seeds and increase the yield. In multiple embodiments, the time of the stirring treatment is 20 minutes and the time of the static treatment is 2 hours. The time of the stirring treatment can be set to 10 minutes, 15 minutes, 25 minutes, and 30 minutes as needed. The time of the static treatment can also be set to 1 hour, 1.5 hours, 2.5 hours, and 3 hours as needed, but it is not limited to the listed values. Other values ​​not listed within the numerical range are also applicable.

[0015] Optionally, the wetting and dispersing agent is one or more of polyethylene glycol octylphenyl ether, fatty acid polyoxyethylene ether, phenethylphenol polyoxyethylene ether, and fatty acid methyl ester sodium sulfonate.

[0016] Wetting and dispersing agents are optimized to facilitate the selection of wetting and dispersing agents. Wetting and dispersing agents can not only increase the dispersibility and stability of the coating solution, but also improve the wettability of the coating solution, improve fluidity, reduce adhesion, make the coating solution evenly adhere to the surface of the sterilized seeds, and enhance the stability and durability of the coating layer.

[0017] Optionally, the wetting and dispersing agent is polyethylene glycol octyl phenyl ether and fatty acid polyoxyethylene ether, and the weight ratio of polyethylene glycol octyl phenyl ether and fatty acid polyoxyethylene ether is (1-3): (1-3). In multiple embodiments, the weight ratio of polyethylene glycol octyl phenyl ether and fatty acid polyoxyethylene ether is 2:1, and the weight ratio can be set to 1:1, 1:2, 1:3, 2:3, 3:1, 3:2 as needed, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0018] Optionally, the trace elements are one or more of potassium dihydrogen phosphate, calcium bicarbonate, zinc sulfate, iron sulfate, manganese sulfate, copper sulfate, and magnesium sulfate.

[0019] Optimizing trace elements facilitates the selection of trace elements, and can provide phosphorus, potassium, calcium, zinc, iron, manganese, copper, and magnesium as needed to promote the growth and germination of coated wheat seeds and enhance stress resistance. Potassium dihydrogen phosphate can promote seed germination and seedling growth, and enhance plant photosynthesis efficiency; calcium bicarbonate helps to regulate soil pH, improve the root environment, and enhance resistance to diseases; zinc sulfate can promote the activity of various enzymes in plants, accelerate protein synthesis, and increase yield and quality; iron sulfate is one of the essential trace elements for plants, which can participate in the formation of chlorophyll and prevent yellowing caused by iron deficiency; manganese sulfate can promote the absorption and utilization of nitrogen and phosphorus by plants and improve antioxidant capacity; copper sulfate can promote the thickening of cell walls and increase mechanical strength; magnesium sulfate can participate in various metabolic processes in plants.

[0020] Optionally, the trace elements are potassium dihydrogen phosphate, calcium bicarbonate, and zinc sulfate, and the weight ratio of potassium dihydrogen phosphate, calcium bicarbonate, and zinc sulfate is (4-6): (2-4): (0.5-1.5). In multiple embodiments, the weight ratio of potassium dihydrogen phosphate, calcium bicarbonate, and zinc sulfate is 5:3:1, and the weight ratio can be set to 4:2:0.5, 4:2:1.5, 4:4:0.5, 4:4:1.5, 6:2:0.5, 6:2:1.5, 6:4:0.5, 6:4:1.5 as needed, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0021] Optionally, the fungicide is one or more of difenoconazole, propiconazole, triadimefon, carbendazim, and thiophanate-methyl.

[0022] Optimizing the fungicide makes it easier to choose the fungicide. In addition, fenpropimorph, propiconazole, triadimefon, carbendazim and thiophanate-methyl can effectively prevent and treat a variety of fungal diseases and improve the disease resistance and survival rate of coated wheat seeds.

[0023] Optionally, the fungicide is difenoconazole and propiconazole, and the weight ratio of difenoconazole and propiconazole is (1-3): (1-3). In multiple embodiments, the weight ratio of difenoconazole and propiconazole is 1:1, and the weight ratio can be set to 1:2, 1:3, 2:1, 2:3, 3:1, 3:2 as needed, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0024] Optionally, the polyethylene glycol is one or more of polyethylene glycol 200, polyethylene glycol 400, polyethylene glycol 600, polyethylene glycol 800, polyethylene glycol 1000, polyethylene glycol 2000, and polyethylene glycol 4000.

[0025] Optionally, the coating solution is prepared by the following method: The coating solution is obtained by mixing water, sodium phosphonyl dipeptide, acetyl hexapeptide-8 derivative, salicylic acid, sorbic acid, sorbitol, polyethylene glycol, a wetting and dispersing agent, trace elements, a bactericide, sodium carboxymethyl starch and gum arabic.

[0026] In summary, this application has at least the following beneficial effects: The wheat seed coating method of the present application first disinfects the wheat seeds, and then coats them with a coating solution to obtain coated wheat seeds. Carboxymethyl starch sodium and gum arabic are added to the raw materials of the coating solution to form a stable coating layer, reduce shedding, further add phosphonyl dipeptide sodium and acetyl hexapeptide-8 derivatives, use astaxanthin and 2-methacryloyloxyethyl phosphorylcholine to treat acetyl hexapeptide-8, and use the synergistic effect between them to enhance the physiological activity of wheat seeds, promote enzyme activity and cell division, accelerate germination, promote plant growth, and increase yield, and make the 4d germination rate of coated wheat seeds>63%, 7d germination rate>85%, 15d taproot length>27cm, 15d plant height>45cm, and yield>6600kg / ha, showing the characteristics of high germination rate, good growth condition, and high yield, which is conducive to the germination and growth of coated wheat seeds and meets market demand. DETAILED DESCRIPTION

[0027] In order to make the present application easier to understand, the present application will be further described in detail below in conjunction with the examples, which are merely illustrative and are not intended to limit the scope of application of the present application. The raw materials or components used in the present application can be obtained through commercial routes or conventional methods unless otherwise specified.

[0028] Preparation Example Preparation Example 1 An acetyl hexapeptide-8 derivative is prepared by the following method: At a stirring rate of 500r / min, add 200g of dimethylformamide to 300g of ethanol and stir for 1min. Then add 50g of acetyl hexapeptide-8 and 2g of sodium ethoxide and stir for 2min. Then add 20g of astaxanthin and 20g of 2-methacryloyloxyethyl phosphorylcholine and stir for 23h. Then, reduce the pressure and concentrate to remove ethanol and dimethylformamide, and then dry to constant weight at 80°C to obtain acetyl hexapeptide-8 derivative.

[0029] Preparation Example 2 An acetyl hexapeptide-8 derivative is prepared by the following method: At a stirring rate of 500r / min, add 300g of dimethylformamide to 200g of ethanol and stir for 1min. Then add 40g of acetyl hexapeptide-8 and 1g of sodium ethoxide and stir for 2min. Then add 30g of astaxanthin and 10g of 2-methacryloyloxyethyl phosphorylcholine and stir for 25h. Then, reduce the pressure and concentrate to remove ethanol and dimethylformamide, and then dry to constant weight at 80°C to obtain acetyl hexapeptide-8 derivative.

[0030] Preparation Example 3 An acetyl hexapeptide-8 derivative is prepared by the following method: At a stirring rate of 500r / min, add 100g of dimethylformamide to 400g of ethanol and stir for 1min. Then add 60g of acetyl hexapeptide-8 and 3g of sodium ethoxide and stir for 2min. Then add 10g of astaxanthin and 30g of 2-methacryloyloxyethyl phosphorylcholine and stir for 20h. Then, reduce the pressure and concentrate to remove ethanol and dimethylformamide, and then dry to constant weight at 80°C to obtain acetyl hexapeptide-8 derivative. Example

[0031] Table 1 Amount of each raw material used in the coating solution (unit: g) Example 1

[0032] A wheat seed coating method mainly comprises the following steps: S0. Prepare coating solution, select wheat seeds and set aside.

[0033] S01. Prepare coating solution: The raw materials and raw material ratios of the coating solution are shown in Table 1.

[0034] Among them, the acetyl hexapeptide-8 derivative is prepared by the method of Preparation Example 1; the polyethylene glycol is polyethylene glycol 400, and is selected from Shandong Huiheng Biotechnology Co., Ltd.; the wetting and dispersing agents are polyethylene glycol octyl phenyl ether and fatty acid polyoxyethylene ether, and the weight ratio of polyethylene glycol octyl phenyl ether and fatty acid polyoxyethylene ether is 2:1, the polyethylene glycol octyl phenyl ether is polyethylene glycol octyl phenyl ether Triton X-100, and the fatty acid polyoxyethylene ether is fatty acid polyoxyethylene ether AEO-3; the trace elements are potassium dihydrogen phosphate, calcium bicarbonate, and zinc sulfate, and the weight ratio of potassium dihydrogen phosphate, calcium bicarbonate, and zinc sulfate is 5:3:1; the bactericides are fenpropimorph and propiconazole, and the weight ratio of fenpropimorph and propiconazole is 1:1; sodium carboxymethyl starch and gum arabic are both selected from Anhui Runtai Biotechnology Co., Ltd.

[0035] The coating solution is prepared by the following method: sodium phosphonyl dipeptide, acetyl hexapeptide-8 derivative, salicylic acid, sorbic acid, sorbitol, polyethylene glycol, a wetting dispersant, trace elements, a bactericide, sodium carboxymethyl starch, and gum arabic are added into water, and the mixture is stirred for 5 minutes to obtain a coating solution.

[0036] S02. Screening wheat seeds: The wheat seeds are Ningmai 13.

[0037] S1. Disinfect wheat seeds to obtain disinfected seeds.

[0038] The wheat seeds were disinfected by the following method: the wheat seeds were poured into a potassium permanganate solution with a mass concentration of 4%, stirred for 3 minutes, allowed to stand for 5 minutes, taken out, washed with water, and dried to obtain disinfected seeds. The moisture content of the disinfected seeds was 12.5%.

[0039] The weight ratio of wheat seeds to potassium permanganate solution is 1:4.

[0040] S2. Take 200 g of the sterilized seeds obtained in step S1, pour them into 800 g of the coating liquid, stir for 20 min, let stand for 2 h, take out, and dry to obtain coated wheat seeds. Example 2

[0041] A wheat seed coating method is different from Example 1 in that the raw material ratio of the coating liquid is different, and the raw material ratio of the coating liquid is shown in Table 1. Example 3

[0042] A wheat seed coating method is different from Example 1 in that the raw material ratio of the coating liquid is different, and the raw material ratio of the coating liquid is shown in Table 1. Example 4

[0043] A wheat seed coating method, which differs from Example 1 in that the sources of the acetyl hexapeptide-8 derivatives in the raw materials of the coating solution are different, and the acetyl hexapeptide-8 derivatives are prepared by the method of Preparation Example 2. Example 5

[0044] A wheat seed coating method, which differs from Example 1 in that the sources of the acetyl hexapeptide-8 derivatives in the raw materials of the coating solution are different, and the acetyl hexapeptide-8 derivatives are prepared by the method of Preparation Example 3.

[0045] Comparative Example Comparative Example 1 A wheat seed coating method, which differs from Example 1 in that an equal amount of sodium phosphonyl dipeptide is used to replace the acetyl hexapeptide-8 derivative in the raw materials of the coating solution.

[0046] Comparative Example 2 A wheat seed coating method, which differs from Example 1 in that, in the raw materials of the coating solution, an equal amount of acetyl hexapeptide-8 is used to replace sodium phosphono dipeptide and acetyl hexapeptide-8 derivatives.

[0047] Comparative Example 3 A wheat seed coating method, which differs from Example 1 in that an equal amount of acetyl hexapeptide-8 is used to replace an acetyl hexapeptide-8 derivative in the raw materials of the coating solution.

[0048] Comparative Example 4 A wheat seed coating method, which differs from Example 1 in that, in the raw materials of the coating solution, in the preparation method of the acetyl hexapeptide-8 derivative, an equal amount of astaxanthin is used to replace 2-methacryloyloxyethyl phosphorylcholine.

[0049] Comparative Example 5 A wheat seed coating method, which differs from Example 1 in that, in the raw materials of the coating solution, in the preparation method of the acetyl hexapeptide-8 derivative, an equal amount of 2-methacryloyloxyethyl phosphorylcholine is used to replace astaxanthin.

[0050] Performance Testing The coating methods of Examples 1-5 and Comparative Examples 1-5 were used to treat wheat seeds to obtain coated wheat seeds. The coated wheat seeds were sown and cultivated, and the germination rate, taproot length, plant height and yield were tested, and the greater the taproot length and the greater the plant height, the better the growth condition of the coated wheat seeds. At the same time, a blank control group was set up, and the wheat seeds in the blank control group were not treated by the coating method, and the wheat seeds were directly sown and cultivated. The test results are shown in Table 2.

[0051] Table 2 Test results

[0052] As can be seen from Table 2, the coated wheat seeds obtained by the coating method of the present application have a high germination rate, with a 4d germination rate of 63.2-65.7% and a 7d germination rate of 85.4-88.6%, and have the characteristics of high germination rate. And it also has a high taproot length and plant height, with a 15d taproot length of 27.8-28.6cm and a 15d plant height of 45.6-46.7cm, showing the characteristics of good growth. At the same time, it also has a high yield, with a yield of 6680-6743kg / ha, showing the characteristics of high yield. The coating method of the present application forms a coating layer on the surface of wheat seeds, which is conducive to the germination and growth of coated wheat seeds, and can also increase yield to meet market demand.

[0053] Comparative Examples 1-3 are compared. In the coating solution used in the coating method of Comparative Example 1, sodium phosphonate dipeptide is added to its raw materials; in the coating solution used in the coating method of Comparative Example 2, acetyl hexapeptide-8 is added to its raw materials; in the coating solution used in the coating method of Comparative Example 3, sodium phosphonate dipeptide and acetyl hexapeptide-8 are added to its raw materials. It can be seen that by adding sodium phosphonate dipeptide and acetyl hexapeptide-8 to the raw materials of the coating solution at the same time, and by utilizing the synergistic effect between them, the germination rate, taproot length, plant height and yield of the coated wheat seeds can be increased, and the coating effect of the wheat seeds can be improved. Combined with Example 1, sodium phosphonate dipeptide and acetyl hexapeptide-8 derivatives are added to the raw materials of the coating solution used in the coating method of Example 1. It can be seen that acetyl hexapeptide-8 is grafted to obtain acetyl hexapeptide-8 derivatives, and applied to the coating solution, the interaction between sodium phosphonate dipeptide and acetyl hexapeptide-8 derivatives is significantly increased, and the use effect of acetyl hexapeptide-8 derivatives is improved.

[0054] Comparative Examples 4-5 and Example 1 are compared. The acetyl hexapeptide-8 derivative added to the coating solution of Comparative Example 4 is obtained by treating astaxanthin acetyl hexapeptide-8; the acetyl hexapeptide-8 derivative added to the coating solution of Comparative Example 5 is obtained by treating acetyl hexapeptide-8 with 2-methacryloyloxyethyl phosphorylcholine; the acetyl hexapeptide-8 derivative added to the coating solution of Example 1 is obtained by treating acetyl hexapeptide-8 with astaxanthin and 2-methacryloyloxyethyl phosphorylcholine. It can be seen that by grafting astaxanthin and 2-methacryloyloxyethyl phosphorylcholine into acetyl hexapeptide-8 and utilizing the synergistic effect therebetween, the coated seeds exhibit better germination rate, growth condition and yield.

[0055] It should be noted that the embodiments described above are only used to explain the present application and do not constitute any limitation to the present application. The present application is described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present application may be modified as specified within the scope of the claims of the present application, and the present invention may be revised without departing from the scope and spirit of the present application. Although the present application described therein relates to specific methods, materials and embodiments, it does not mean that the present application is limited to the specific examples disclosed therein. On the contrary, the present application can be extended to all other methods and applications with the same functions.

Claims

1. A wheat seed coating method, characterized in that: The main steps are as follows: S1. Disinfecting wheat seeds to obtain disinfected seeds; S2, pouring the sterilized seeds into the coating solution, stirring, standing, taking out, and drying to obtain coated wheat seeds; The coating solution is mainly made of the following raw materials in percentage by weight: 2-4% sodium phosphono dipeptide, 1-3% acetyl hexapeptide-8 derivative, 0.1-0.3% salicylic acid, 0.1-0.3% sorbic acid, 1-3% sorbitol, 1-3% polyethylene glycol, 0.1-0.5% wetting dispersant, 0.2-0.6% trace elements, 0.2-0.6% bactericide, 3-5% sodium carboxymethyl starch, 3-5% gum arabic, and the balance is water; the acetyl hexapeptide-8 derivative is obtained by treating acetyl hexapeptide-8 with astaxanthin and 2-methacryloyloxyethyl phosphorylcholine.

2. A wheat seed coating method according to claim 1, characterized in that: The acetyl hexapeptide-8 derivative is prepared by the following method: Under constant stirring, ethanol and dimethylformamide are mixed, and then acetyl hexapeptide-8 and sodium ethoxide are added and mixed, and then astaxanthin and 2-methacryloyloxyethyl phosphorylcholine are added, and stirred for 20-25 hours, concentrated under reduced pressure, and dried to obtain acetyl hexapeptide-8 derivatives.

3. A wheat seed coating method according to claim 2, characterized in that: The weight ratio of acetyl hexapeptide-8, astaxanthin and 2-methacryloyloxyethyl phosphorylcholine is (4-6):(1-3):(1-3).

4. A wheat seed coating method according to claim 2, characterized in that: The weight ratio of acetyl hexapeptide-8, sodium ethoxide, ethanol and dimethylformamide is (4-6):(0.1-0.3):(20-40):(10-30).

5. A wheat seed coating method according to claim 1, characterized in that: In step S2, the weight ratio of the disinfected seeds to the coating liquid is 1:(3-5).

6. A wheat seed coating method according to claim 1, characterized in that: In step S2, the stirring treatment time is 10-30 minutes, and the static treatment time is 1-3 hours.

7. A wheat seed coating method according to claim 1, characterized in that: The wetting and dispersing agent is one or more of polyethylene glycol octylphenyl ether, fatty acid polyoxyethylene ether, phenethylphenol polyoxyethylene ether, and fatty acid methyl ester sodium sulfonate.

8. A wheat seed coating method according to claim 1, characterized in that: The trace elements are one or more of potassium dihydrogen phosphate, calcium bicarbonate, zinc sulfate, iron sulfate, manganese sulfate, copper sulfate, and magnesium sulfate.

9. A wheat seed coating method according to claim 1, characterized in that: The fungicide is one or more of difenoconazole, propiconazole, triadimefon, carbendazim and thiophanate-methyl.

10. A wheat seed coating method according to claim 1, characterized in that: The coating solution is prepared by the following method: The coating solution is obtained by mixing water, sodium phosphonyl dipeptide, acetyl hexapeptide-8 derivative, salicylic acid, sorbic acid, sorbitol, polyethylene glycol, a wetting and dispersing agent, trace elements, a bactericide, sodium carboxymethyl starch and gum arabic.

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