Fertilization process for fruit tree planting

Abstract

The invention relates to a fertilization process for fruit tree planting, and belongs to the technical field of fruit tree planting processes. The fertilizing process comprises the following steps: digging a fertilizing ditch on one side of a main stem of a fruit tree, applying a slow-release fertilizer, and covering soil after the slow-release fertilizer is applied. The distance between the fertilization furrows and main stems of the fruit trees is 30-50 cm, the fertilization amount of the slow-release fertilizer is 5-10 kg per fruit tree, and the slow-release fertilizer is prepared from graphene, amino acid, urea, monopotassium phosphate, calcium nitrate and modified salicylaldehyde. According to the invention, on the basis of the slow-release fertilizer, a fertilization process during planting is reasonably blended, and the fertilization distance and the fertilization amount of the slow-release fertilizer are subjected to targeted range matching, so that the slow-release fertilizer can be effectively absorbed by a root system, and waste of the fertilizer is avoided. The proper fertilization distance can encourage the outward expansion of the root system, so that the healthy growth of the root system is facilitated, and the stress resistance of the fruit tree is enhanced. The reasonable fertilizing amount can further promote the growth of fruit trees and improve the yield of the fruit trees and the quality of fruits.

Description

Technical Field

[0001] The invention belongs to the technical field of fruit tree planting technology and relates to a fertilization technology for fruit tree planting. Background Art

[0002] Fertilization can not only enhance the fertility of the soil, but also increase the content of mineral nutrients in leaves and fruits, playing a vital role in the growth and development of fruit trees. At present, the fertilizers commonly used on fruit trees are mainly divided into three categories: organic fertilizers, inorganic fertilizers and new-type high-efficiency fertilizers. Organic fertilizers mainly include manure fertilizers, compost fertilizers, green manures, cake fertilizers, peat, sea fertilizers and miscellaneous fertilizers; inorganic fertilizers mainly include single fertilizers such as nitrogen fertilizers, phosphorus fertilizers, potassium fertilizers and compound fertilizers. The current fertilization method mainly uses organic fertilizers or a combination of organic and inorganic fertilizers, and the use of compound fertilizers alone is rare.

[0003] As a new type of carbon nanomaterial, graphene has become a hot topic in the field of nanomaterials research due to its excellent properties such as good biocompatibility, stable chemical properties, high dispersibility, large specific surface area and rich oxygen-containing functional groups. In recent years, graphene oxide has also received widespread attention and application in the field of modern agricultural technology. Graphene can be used as a carrier of nutrient fertilizers in fertilizers. It fixes fertilizers through adsorption, thereby reducing the release rate of fertilizers such as urea. It can also improve the soil environment and promote plant growth. In addition, graphene can increase water loading capacity and soil porosity, and reduce soil density. Graphene can not only improve soil properties, but also increase the fruit yield of fruit trees. Summary of the invention

[0004] The purpose of the present invention is to provide a fertilization process for fruit tree planting. The present invention forms a stable complex through graphene and amino acids, utilizes the complex to adsorb and attach fertilizers, then constructs a stable coating layer structure through modified salicylaldehyde and amino acids, and forms a dense coating layer structure through chemical crosslinking and physical crosslinking. The slow-release fertilizer prepared by the present invention can not only improve the fertility of the soil, but also enhance the utilization rate of nutrients by fruit trees, thereby improving the yield and quality of the fruit trees.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A fertilization process for fruit tree planting comprises the following steps: digging a fertilization ditch on one side of a main stem of a fruit tree, uniformly applying a slow-release fertilizer into the fertilization ditch, and covering with soil after the application is completed. The slow-release fertilizer is prepared using graphene, amino acids, urea, potassium dihydrogen phosphate, calcium nitrate and modified salicylaldehyde as raw materials.

[0007] As a preferred technical solution of the present invention, in the fertilization process, the fertilization ditch is 30-50 cm away from the main trunk of the fruit tree.

[0008] As a preferred technical solution of the present invention, in the fertilization process, the application amount of the slow-release fertilizer is 5-10 kg per fruit tree.

[0009] As a preferred technical solution of the present invention, in the fertilization process, the slow-release fertilizer is applied from mid-to-late September to early October each year.

[0010] As a preferred technical solution of the present invention, the fruit trees are common fruit trees such as apple trees, pear trees, grapefruit trees and grape trees.

[0011] The invention discloses a method for preparing the slow-release fertilizer, comprising the following steps:

[0012] 1) mixing graphene, deionized water and amino acid, performing ultrasonic treatment, adding base material, stirring and mixing, standing and freeze-drying to obtain a composite material;

[0013] 2) After the vinyl salicylaldehyde, isopropyl alcohol and thio compound are stirred and mixed, a photoinitiator is added, the mixture is treated with ultraviolet light, and after rotary evaporation, modified salicylaldehyde is obtained;

[0014] 3) The composite material and the ethanol solution are mixed and preheated, and modified salicylaldehyde is added and stirred at a constant temperature. The solid matter is filtered and washed and placed in an oven, and vacuum dried to obtain a slow-release fertilizer.

[0015] As a preferred technical solution of the present invention, in step 1), the mass ratio of the graphene, deionized water, amino acid and base material is 11-13:50-60:2.3-2.7:1.2-1.5.

[0016] As a preferred technical solution of the present invention, in step 1), the base material is mixed with urea, potassium dihydrogen phosphate and calcium nitrate in a mass ratio of 10-10.8:5-6:3.0-3.4, and the amino acid is one or both of lysine and arginine.

[0017] As a preferred technical solution of the present invention, in step 1), the ultrasonic treatment is performed at a frequency of 500-600W for 30-45min; the stirring and mixing is performed at a speed of 500-700r / min for 40-60min; and the standing time is 8-10h.

[0018] As a preferred technical solution of the present invention, in step 2), the mass ratio of the vinyl salicylaldehyde, isopropanol, thio compound and photoinitiator is 3-4:16-20:4.8-6.0:0.14-0.16; the thio compound is 2,5-dihydroxythiophenol; and the photoinitiator is photoinitiator 651.

[0019] As a preferred technical solution of the present invention, in step 2), the stirring and mixing is stirring at a speed of 700-800 r / min for 20-30 min; the ultraviolet treatment is irradiating with ultraviolet rays at a wavelength of 365 nm for 8-10 h.

[0020] As a preferred technical solution of the present invention, in step 3), the mass ratio of the composite material, the ethanol solution and the modified salicylaldehyde is 6-7:30-40:1.0-1.2.

[0021] As a preferred technical solution of the present invention, in step 3), the preheating is heating to 50°C; the constant temperature stirring is stirring at 60-70°C for 5-6h; the cleaning is cleaning with anhydrous ethanol for 3 times; and the vacuum drying is vacuum drying at 70-80°C to constant weight.

[0022] Beneficial effects of the present invention:

[0023] (1) The present invention forms a stable complex through graphene and amino acids, utilizes the complex to adsorb and attach fertilizers, then constructs a stable coating layer structure through modified salicylaldehyde and amino acids, and forms a dense coating layer structure through chemical crosslinking and physical crosslinking. The slow-release fertilizer prepared by the present invention can not only improve the fertility of the soil, but also enhance the utilization rate of nutrients by fruit trees, thereby improving the yield and quality of fruit trees.

[0024] (2) Based on the slow-release fertilizer, the present invention reasonably adjusts the fertilization process during planting, and matches the fertilization distance and fertilization amount of the slow-release fertilizer in a targeted manner, thereby ensuring that the slow-release fertilizer is effectively absorbed by the root system and avoiding fertilizer waste. In addition, the appropriate fertilization distance can encourage the root system to expand outward, which is conducive to the healthy growth of the root system and enhances the resistance of fruit trees. At the same time, a reasonable fertilization amount can further promote the growth of fruit trees, improve the yield of fruit trees and the quality of fruits. DETAILED DESCRIPTION

[0025] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in combination with the embodiments.

[0026] A fertilization process for fruit tree planting comprises the following steps: digging a fertilization ditch on one side of the main stem of the fruit tree, evenly applying slow-release fertilizer into the fertilization ditch, and covering with soil after the application is completed;

[0027] In the fertilization process, the fertilization ditch is 30-50 cm away from the main trunk of the fruit tree; the application amount of the slow-release fertilizer is 5-10 kg / fruit tree; in the fertilization process, the application time of the slow-release fertilizer is from mid-to-late September to early October each year.

[0028] The fruit trees are common fruit trees such as apple trees, pear trees, grape trees and the like.

[0029] Example 1

[0030] The preparation method of the slow-release fertilizer comprises the following steps:

[0031] 1) mixing graphene, deionized water and lysine, performing ultrasonic treatment, adding a base material, stirring and mixing, standing and then freeze-drying to obtain a composite material;

[0032] 2) After the vinyl salicylaldehyde, isopropyl alcohol and thio compound are stirred and mixed, a photoinitiator is added, the mixture is treated with ultraviolet light, and after rotary evaporation, modified salicylaldehyde is obtained;

[0033] 3) The composite material and the ethanol solution are mixed and preheated, and modified salicylaldehyde is added and stirred at a constant temperature. The solid matter is filtered and washed and placed in an oven, and vacuum dried to obtain a slow-release fertilizer.

[0034] In step 1), the mass ratio of graphene, deionized water, lysine and base material is 11:50:2.3:1.2; the base material is mixed with urea, potassium dihydrogen phosphate and calcium nitrate in a mass ratio of 10:5:3.0; the ultrasonic treatment is performed at a frequency of 500W for 30 minutes; the stirring and mixing is performed at a speed of 500r / min for 40 minutes; and the standing time is 8h.

[0035] In step 2), the mass ratio of the vinyl salicylaldehyde, isopropanol, thio compound and photoinitiator is 3:16:4.8:0.14; the thio compound is 2,5-dihydroxybenzenethiol; the photoinitiator is photoinitiator 651; the stirring and mixing is stirring at a speed of 700 r / min for 20 minutes; the ultraviolet treatment is irradiating with ultraviolet rays at a wavelength of 365 nm for 8 hours.

[0036] In step 3), the mass ratio of the composite material, the ethanol solution and the modified salicylaldehyde is 6:30:1.0; the preheating is heating to 50°C; the constant temperature stirring is stirring at 60°C for 5 hours; the cleaning is cleaning with anhydrous ethanol for 3 times; and the vacuum drying is vacuum drying at 70°C to constant weight.

[0037] Example 2

[0038] The preparation method of the slow-release fertilizer comprises the following steps:

[0039] 1) mixing graphene, deionized water and arginine, performing ultrasonic treatment, adding a base material, stirring and mixing, standing and then freeze-drying to obtain a composite material;

[0040] 2) After the vinyl salicylaldehyde, isopropyl alcohol and thio compound are stirred and mixed, a photoinitiator is added, the mixture is treated with ultraviolet light, and after rotary evaporation, modified salicylaldehyde is obtained;

[0041] 3) The composite material and the ethanol solution are mixed and preheated, and modified salicylaldehyde is added and stirred at a constant temperature. The solid matter is filtered and washed and placed in an oven, and vacuum dried to obtain a slow-release fertilizer.

[0042] In step 1), the mass ratio of graphene, deionized water, arginine and base material is 11.5:52:2.4:1.3; the base material is mixed with urea, potassium dihydrogen phosphate and calcium nitrate in a mass ratio of 10.2:5.2:3.1; the ultrasonic treatment is performed at a frequency of 525W for 34 minutes; the stirring and mixing is performed at a speed of 550r / min for 45 minutes; and the standing time is 8.5h.

[0043] In step 2), the mass ratio of the vinyl salicylaldehyde, isopropanol, thio compound and photoinitiator is 3.2:17:5.1:0.15; the thio compound is 2,5-dihydroxybenzenethiol; the photoinitiator is photoinitiator 651; the stirring and mixing is stirring at a speed of 720 r / min for 22 minutes; the ultraviolet treatment is irradiating with ultraviolet rays at a wavelength of 365 nm for 8.5 hours.

[0044] In step 3), the mass ratio of the composite material, the ethanol solution and the modified salicylaldehyde is 6.2:32:1.1; the preheating is heating to 50°C; the constant temperature stirring is stirring at 62°C for 5.2h; the cleaning is cleaning with anhydrous ethanol for 3 times; the vacuum drying is vacuum drying at 72°C to constant weight.

[0045] Example 3

[0046] The preparation method of the slow-release fertilizer comprises the following steps:

[0047] 1) mixing graphene, deionized water and lysine, performing ultrasonic treatment, adding a base material, stirring and mixing, standing and then freeze-drying to obtain a composite material;

[0048] 2) After the vinyl salicylaldehyde, isopropyl alcohol and thio compound are stirred and mixed, a photoinitiator is added, the mixture is treated with ultraviolet light, and after rotary evaporation, modified salicylaldehyde is obtained;

[0049] 3) The composite material and the ethanol solution are mixed and preheated, and modified salicylaldehyde is added and stirred at a constant temperature. The solid matter is filtered and washed and placed in an oven, and vacuum dried to obtain a slow-release fertilizer.

[0050] In step 1), the mass ratio of graphene, deionized water, lysine and base material is 12:55:2.5:1.3; the base material is mixed with urea, potassium dihydrogen phosphate and calcium nitrate in a mass ratio of 10.4:5.5:3.2; the ultrasonic treatment is performed at a frequency of 550W for 38 minutes; the stirring and mixing is performed at a speed of 600r / min for 50 minutes; and the standing time is 9 hours.

[0051] In step 2), the mass ratio of the vinyl salicylaldehyde, isopropanol, thio compound and photoinitiator is 3.5:18:5.4:0.15; the thio compound is 2,5-dihydroxybenzenethiol; the photoinitiator is photoinitiator 651; the stirring and mixing is stirring at a speed of 750 r / min for 25 minutes; the ultraviolet treatment is irradiating with ultraviolet rays at a wavelength of 365 nm for 9 hours.

[0052] In step 3), the mass ratio of the composite material, the ethanol solution and the modified salicylaldehyde is 6.5:35:1.1; the preheating is heating to 50°C; the constant temperature stirring is stirring at 65°C for 5.5h; the cleaning is cleaning with anhydrous ethanol for 3 times; and the vacuum drying is vacuum drying at 75°C to constant weight.

[0053] Example 4

[0054] The preparation method of the slow-release fertilizer comprises the following steps:

[0055] 1) mixing graphene, deionized water and lysine, performing ultrasonic treatment, adding a base material, stirring and mixing, standing and then freeze-drying to obtain a composite material;

[0056] 2) After the vinyl salicylaldehyde, isopropyl alcohol and thio compound are stirred and mixed, a photoinitiator is added, the mixture is treated with ultraviolet light, and after rotary evaporation, modified salicylaldehyde is obtained;

[0057] 3) The composite material and the ethanol solution are mixed and preheated, and modified salicylaldehyde is added and stirred at a constant temperature. The solid matter is filtered and washed and placed in an oven, and vacuum dried to obtain a slow-release fertilizer.

[0058] In step 1), the mass ratio of graphene, deionized water, lysine and base material is 12.5:58:2.6:1.4; the base material is mixed with urea, potassium dihydrogen phosphate and calcium nitrate in a mass ratio of 10.6:5.8:3.3; the ultrasonic treatment is performed at a frequency of 575W for 41 minutes; the stirring and mixing is performed at a speed of 650r / min for 55 minutes; and the standing time is 9.5h.

[0059] In step 2), the mass ratio of the vinyl salicylaldehyde, isopropanol, thio compound and photoinitiator is 3.8:19:5.7:0.15; the thio compound is 2,5-dihydroxybenzenethiol; the photoinitiator is photoinitiator 651; the stirring and mixing is stirring at a speed of 770 r / min for 28 minutes; the ultraviolet treatment is irradiating with ultraviolet rays at a wavelength of 365 nm for 9.5 hours.

[0060] In step 3), the mass ratio of the composite material, the ethanol solution and the modified salicylaldehyde is 6.8:38:1.1; the preheating is heating to 50°C; the constant temperature stirring is stirring at 68°C for 5.8h; the cleaning is cleaning with anhydrous ethanol for 3 times; and the vacuum drying is vacuum drying at 78°C to constant weight.

[0061] Example 5

[0062] The preparation method of the slow-release fertilizer comprises the following steps:

[0063] 1) mixing graphene, deionized water and lysine, performing ultrasonic treatment, adding a base material, stirring and mixing, standing and then freeze-drying to obtain a composite material;

[0064] 2) After the vinyl salicylaldehyde, isopropyl alcohol and thio compound are stirred and mixed, a photoinitiator is added, the mixture is treated with ultraviolet light, and after rotary evaporation, modified salicylaldehyde is obtained;

[0065] 3) The composite material and the ethanol solution are mixed and preheated, and modified salicylaldehyde is added and stirred at a constant temperature. The solid matter is filtered and washed and placed in an oven, and vacuum dried to obtain a slow-release fertilizer.

[0066] In step 1), the mass ratio of graphene, deionized water, lysine and base material is 13:60:2.7:1.5; the base material is mixed with urea, potassium dihydrogen phosphate and calcium nitrate in a mass ratio of 10.8:6:3.4; the ultrasonic treatment is performed at a frequency of 600W for 45 minutes; the stirring and mixing is performed at a speed of 700r / min for 60 minutes; and the standing time is 10 hours.

[0067] In step 2), the mass ratio of the vinyl salicylaldehyde, isopropanol, thio compound and photoinitiator is 4:20:6.0:0.16; the thio compound is 2,5-dihydroxybenzenethiol; the photoinitiator is photoinitiator 651; the stirring and mixing is stirring at a speed of 800 r / min for 30 minutes; and the ultraviolet treatment is irradiating with ultraviolet rays at a wavelength of 365 nm for 10 hours.

[0068] In step 3), the mass ratio of the composite material, the ethanol solution and the modified salicylaldehyde is 7:40:1.2; the preheating is heating to 50°C; the constant temperature stirring is stirring at 70°C for 6 hours; the cleaning is cleaning with anhydrous ethanol for 3 times; and the vacuum drying is vacuum drying at 80°C to constant weight.

[0069] Comparative Example 1

[0070] Compared with Example 5, the difference in Comparative Example 1 is that threonine is used instead of lysine in Comparative Example 1, and the other components, preparation steps and parameters are the same.

[0071] Comparative Example 2

[0072] Compared with Example 5, the difference in Comparative Example 2 is that lysine is not used in Comparative Example 2, and the other components, preparation steps and parameters are the same.

[0073] Comparative Example 3

[0074] Compared with Example 5, the difference in Comparative Example 3 is that the thio compound in Comparative Example 3 is replaced by 3-mercapto-1,2-propanediol, and the other components, preparation steps and parameters are the same.

[0075] Comparative Example 4

[0076] Compared with Example 5, Comparative Example 4 is different in that no thio compound is used in Comparative Example 4, and the other components, preparation steps and parameters are the same.

[0077] Comparative Example 5

[0078] Compared with Example 5, the difference of Comparative Example 5 is that vinyl salicylaldehyde is not used in Comparative Example 5, and the other components, preparation steps and parameters are the same.

[0079] Comparative Example 6

[0080] Compared with Example 5, Comparative Example 6 is different in that step 3);

[0081] Step 3) The composite material and the ethanol solution are mixed and preheated, modified salicylaldehyde is added and stirred at a constant temperature, the solid is filtered, and the solid is placed in an oven after washing and vacuum dried to obtain a slow-release fertilizer, wherein the constant temperature stirring is stirring at 50° C. for 6 hours; the remaining components, preparation steps and parameters are the same.

[0082] The slow-release fertilizers prepared in Examples 1-5 and Comparative Examples 1-6 were tested as follows. The test results are shown in Table 1.

[0083] Stability test: According to GB / T23348-2009, the water dissolution rate method was used for determination. 10 grams of slow-release fertilizer were weighed, each was soaked in 250 grams of clean water, and placed in a constant temperature box at 25°C. The dissolution rate of urea was measured after 1 day and 30 days respectively;

[0084] Table 1

[0085] 1 day 30 days Example 1 0.7 31.25 Example 2 0.8 31.43 Example 3 0.6 30.77 Example 4 0.8 31.52 Example 5 0.5 30.14 Comparative Example 1 2.3 48.84 Comparative Example 2 6.2 67.25 Comparative Example 3 1.8 43.41 Comparative Example 4 3.5 58.08 Comparative Example 5 5.0 62.95 Comparative Example 6 1.4 40.76

[0086] From the test results in Table 1, it can be seen that compared with Comparative Examples 1-6, the slow-release fertilizers prepared in Examples 1-5 have a significant slow-release effect.

[0087] By comparative analysis, it can be seen that this is because the present invention promotes amino acids to be loaded on the graphene surface to form a stable complex through the physical adsorption force between the hydroxyl groups of graphene and the active groups of amino acids. Subsequently, the base material is adsorbed and attached using the hydroxyl groups, amino groups and carboxyl groups on the complex. Urea, potassium dihydrogen phosphate and calcium nitrate are coated by adding modified salicylaldehyde to prepare a slow-release fertilizer. Graphene can significantly improve the physical and chemical properties and fertility of the soil due to its excellent biocompatibility, chemical stability, high dispersibility, large specific surface area and abundant oxygen-containing functional groups. Its unique layered structure provides an ideal loading space for urea, potassium dihydrogen phosphate and calcium nitrate. The present invention further obtains modified salicylaldehyde by chemical bonding of vinyl salicylaldehyde and dihydroxythiophenol, and the aldehyde group and amino group of the substance can form an imine bond to construct a stable coating structure. Multiple amino groups of amino acids and the double benzene ring structure on the modified salicylaldehyde can promote the formation of a denser coating layer. In addition, the multiple active hydroxyl groups introduced by the modified salicylaldehyde, combined with its oxygen-containing functional groups, can form physical crosslinks with the hydroxyl and carboxyl groups on the core material, further improving the compactness of the coating layer structure. Therefore, the slow-release fertilizer prepared by the present invention can not only improve the fertility of the soil, but also enhance the utilization rate of nutrients by fruit trees, thereby improving the yield and quality of fruit trees.

[0088] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fertilization process for fruit tree planting, characterized in that: The fertilization process comprises the following steps: digging a fertilization ditch on one side of the main trunk of the fruit tree, uniformly applying slow-release fertilizer into the fertilization ditch, and covering with soil after the application is completed; the slow-release fertilizer is prepared with graphene, amino acids, urea, potassium dihydrogen phosphate, calcium nitrate and modified salicylaldehyde as raw materials.

2. The fertilization process for fruit tree planting according to claim 1, characterized in that: In the fertilization process, the fertilization ditch is 30-50 cm away from the main trunk of the fruit tree.

3. The fertilization process for fruit tree planting according to claim 1, characterized in that: In the fertilization process, the application amount of the slow-release fertilizer is 5-10 kg per fruit tree.

4. The fertilization process for fruit tree planting according to claim 1, characterized in that: In the fertilization process, the slow-release fertilizer is applied from mid-to-late September to early October each year.

5. The fertilization process for fruit tree planting according to claim 1, characterized in that: The preparation method of the slow-release fertilizer comprises the following steps: 1) mixing graphene, deionized water and amino acid, performing ultrasonic treatment, adding base material, stirring and mixing, standing and freeze-drying to obtain a composite material; 2) After the vinyl salicylaldehyde, isopropyl alcohol and thio compound are stirred and mixed, a photoinitiator is added, the mixture is treated with ultraviolet light, and after rotary evaporation, modified salicylaldehyde is obtained; 3) The composite material and the ethanol solution are mixed and preheated, and modified salicylaldehyde is added and stirred at a constant temperature. The solid matter is filtered and washed and placed in an oven, and vacuum dried to obtain a slow-release fertilizer.

6. The fertilization process for fruit tree planting according to claim 5, characterized in that: In step 1), the mass ratio of graphene, deionized water, amino acid and base material is 11-13:50-60:2.3-2.7:1.2-1.5; the base material is prepared by mixing urea, potassium dihydrogen phosphate and calcium nitrate in a mass ratio of 10-10.8:5-6:3.0-3.4, and the amino acid is one or two of lysine and arginine; the ultrasonic treatment is performed at a frequency of 500-600W for 30-45min; the stirring and mixing is performed at a speed of 500-700r / min for 40-60min; and the standing time is 8-10h.

7. The fertilization process for fruit tree planting according to claim 5, characterized in that: In step 2), the mass ratio of the vinyl salicylaldehyde, isopropanol, thio compound and photoinitiator is 3-4:16-20:4.8-6.0:0.14-0.16; the thio compound is 2,5-dihydroxybenzenethiol; the photoinitiator is photoinitiator 651; the stirring and mixing is stirring at a speed of 700-800 r / min for 20-30 min; the ultraviolet treatment is irradiating with ultraviolet rays at a wavelength of 365 nm for 8-10 h.

8. The fertilization process for fruit tree planting according to claim 5, characterized in that: In step 3), the mass ratio of the composite material, the ethanol solution and the modified salicylaldehyde is 6-7:30-40:1.0-1.2; the preheating is heating to 50°C; the constant temperature stirring is stirring at 60-70°C for 5-6h; the cleaning is cleaning with anhydrous ethanol for 3 times; the vacuum drying is vacuum drying at 70-80°C to constant weight.