Nano synergetic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer and preparation method thereof

Abstract

The invention belongs to the technical field of agricultural fertilizers, and particularly relates to a nano synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer and a preparation method thereof. The nano synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer is prepared from the following raw materials in percentage by mass: 20.0 to 50.0 percent of a nano silicon source, 5.0 to 20.0 percent of a titanium source, 30.0 to 50.0 percent of a calcium source, 10.0 to 20.0 percent of a magnesium source, 0.5 to 2.0 percent of a zinc source, 5.0 to 12.0 percent of a composite chelating agent, 10.0 to 15.0 percent of a biostimulant, 1.0 to 3.0 percent of a dispersing agent, 0.5 to 2.0 percent of a pH regulator and the balance of deionized water. The invention solves the problem of multi-element antagonism, has high nutrient absorption rate, has nutrition and stress resistance functions, and can be used for foliage spraying or root irrigation of various crops.

Description

Technical Field

[0001] This invention belongs to the field of agricultural fertilizer technology, specifically relating to a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer and its preparation method. Background Technology

[0002] Micronutrients (such as silicon, titanium, calcium, magnesium, and zinc) are essential nutrients for crop growth and development, directly affecting crop yield, quality, and stress resistance. Currently, multi-element liquid fertilizers on the market generally suffer from the following technical defects: First, poor compatibility between elements, easily leading to antagonistic reactions and reduced nutrient availability. For example, calcium easily forms insoluble precipitates with zinc and magnesium in aqueous solutions, making them unsuitable for simultaneous crop absorption. Second, the nutrient forms are limited, mostly inorganic ions, resulting in low crop absorption rates and high loss rates due to easy fixation in the soil. Third, their functions are singular, only providing nutrition and failing to address the need to enhance crop stress resistance (such as drought, cold, and pest resistance) and improve the soil microenvironment. Fourth, the preparation process is cumbersome, often employing simple mixing or single chelation techniques, making it difficult to achieve synergistic stability of multiple elements.

[0003] To address the aforementioned issues, some chelated multi-element fertilizers have emerged in the existing technology, such as those using single chelating agents like EDTA and citric acid to chelate elements. However, these chelating agents suffer from poor chelation stability, high cost, and an inability to simultaneously meet the chelation requirements of multiple elements. Furthermore, existing technologies rarely combine silicon and titanium with calcium, magnesium, and zinc, and do not incorporate nanotechnology to improve nutrient dispersibility and absorption efficiency.

[0004] Therefore, developing a multi-element synergistic stable, highly absorbable, and nutritionally and stress-resistant liquid fertilizer with silicon-titanium-calcium-magnesium-zinc properties is of great practical significance. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer, comprising the following raw materials by mass percentage: nano-silicon source 20.0-50.0%, titanium source 5.0-20.0%, calcium source 30.0-50.0%, magnesium source 10.0-20.0%, zinc source 0.5-2.0%, composite chelating agent 5.0-12.0%, biostimulant 10.0-15.0%, dispersant 1.0-3.0%, pH adjuster 0.5-2.0%, and the balance being deionized water.

[0006] Preferably, the nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer comprises the following raw materials in the following mass percentages: 20% nano-silicon source, 5% titanium source, 30% calcium source, 10% magnesium source, 0.5% zinc source, 5.0% composite chelating agent, 10% biostimulant, 1% dispersant, 0.5% pH adjuster, and the balance being deionized water.

[0007] Preferably, the nano-silicon source is nano-silica sol with a particle size of 4-17 nm;

[0008] And / or, the titanium source is tetrabutyl titanate or nano-titanium sol modified by hydrolysis of nano-sized titanium dioxide sol, with a particle size of 3-10 nm; And / or, the calcium source is calcium nitrate or calcium chloride; And / or, the magnesium source is magnesium nitrate or magnesium chloride; And / or, the zinc source is zinc nitrate or zinc chloride.

[0009] Preferably, the composite chelating agent is composed of composite amino acids, alginic acid, and humic acid in a mass ratio of 3:2:1; And / or, the biostimulant is a compound of seaweed extract and amino acid oligosaccharide in a mass ratio of 2:1; And / or, the dispersant is one of polyethylene glycol-6000, sodium dodecylbenzenesulfonate, protein polypeptide-based dispersant, and rhamnolipid; And / or, the pH adjuster is sodium hydroxide or dipotassium hydrogen phosphate, used to adjust the pH of the liquid fertilizer to 5.5~7.0.

[0010] Preferably, the seaweed extract is an oligosaccharide derived from brown algae through enzymatic hydrolysis, with a molecular weight of 1000-3000 Da; And / or, the amino acid oligosaccharide is a glutamic acid oligosaccharide or a glycine oligosaccharide with a molecular weight of 1000-3000 Da.

[0011] Based on the same technical concept, another aspect of the present invention is to provide a method for preparing a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer, the preparation method comprising the following steps: (1) Preparation of nano-titanium sol: Tetrabutyl titanate or nano-titanium dioxide is dissolved in anhydrous ethanol and stirred evenly to obtain a tetrabutyl titanate or nano-titanium dioxide ethanol solution; deionized water is added to the tetrabutyl titanate or nano-titanium dioxide ethanol solution, and stirring is continued after completion. Citric acid is then added and stirring is continued to obtain modified nano-titanium sol, i.e. titanium source. (2) Preparation of composite chelation mother liquor: Heat deionized water, add composite chelating agent, and then add calcium source, magnesium source and zinc source in sequence to obtain composite chelation mother liquor; (3) Preparation of nano-synergistic dispersion: Add nano-silicon source and nano-titanium sol to the composite chelation mother liquor, add dispersant and heat and stir, and at the same time use ultrasonic dispersion treatment to obtain nano-synergistic dispersion; (4) Compounding and adjustment: Add biostimulant to the nano-synergistic dispersion and stir to mix, then add pH adjuster and continue stirring to obtain compound solution; (5) Filtration and maturation: The compound solution is filtered to remove impurities, and then the filtered solution is matured to obtain a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer.

[0012] Preferably, in step (1), tetrabutyl titanate or nano-titanium dioxide is dissolved in anhydrous ethanol and stirred evenly to obtain a tetrabutyl titanate or nano-titanium dioxide ethanol solution with a mass concentration of 10-20%; under the conditions of constant temperature of 80-120℃ and stirring rate of 200-300r / min, deionized water is added dropwise to the tetrabutyl titanate or nano-titanium dioxide ethanol solution at a dropping rate of 1-2mL / min. After the addition is completed, stirring is continued for 1-2h, and then citric acid accounting for 5-10% of the mass of tetrabutyl titanate or nano-titanium dioxide is added, and stirring is continued for 30-60min to obtain nano-titanium sol.

[0013] Preferably, in step (2), deionized water is added to the reaction vessel, the temperature is raised to 80-150℃, a composite chelating agent is added, and the mixture is stirred until completely dissolved; then calcium source, magnesium source, and zinc source are added in sequence, and the mixture is stirred for 8-15 hours after each addition of a raw material, with the stirring rate controlled at 80-150 r / min, to obtain the composite chelating mother liquor.

[0014] Preferably, in step (3), nano-silicon source and nano-titanium sol are added to the composite chelate mother liquor, a dispersant is added, the temperature is raised to 50-80℃, the stirring rate is increased to 300-500r / min, and the stirring is carried out for 2-3 hours. At the same time, ultrasonic dispersion treatment is adopted, with ultrasonic power of 150-200W and dispersion time of 30-60min, to obtain nano-synergistic dispersion.

[0015] Preferably, in step (4), a biostimulant is added to the nano-synergistic dispersion and stirred for 1-2 hours until completely mixed; then a pH adjuster is added to adjust the pH of the system to 5.5-7.0, and stirring is continued for 30-60 minutes to obtain the compound solution; In step (5), the compound solution is filtered through a 0.22μm microporous membrane to remove impurities; the filtered solution is placed in a curing tank and cured at 80-120℃ for 24-48h to obtain a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer.

[0016] The nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer can be used for foliar spraying or root irrigation of crops such as wheat, rice, corn, vegetables, and fruits. When used for foliar spraying, it should be diluted 800-1000 times, and when used for root irrigation, it should be diluted 300-500 times.

[0017] The beneficial effects of this invention are as follows: This invention achieves highly efficient chelation of elements such as calcium, magnesium, and zinc through a precise formulation of a compound chelating agent (compound amino acids, alginic acid, and humic acid). Simultaneously, the synergistic dispersion design of nano-silicon sources and modified nano-titanium sol completely avoids antagonistic reactions between elements. After 12 months of sealed storage at room temperature, there is no precipitation or stratification, and the light transmittance remains above 85%, significantly improving fertilizer storage stability. Furthermore, the particle size advantage of the nano-sized silicon source (4-17nm) and titanium source (3-10nm), combined with the chelated nutrient form, reduces soil fixation and loss. Hydroponic experiments have verified that crop absorption rates of calcium, magnesium, and zinc are increased by 35-50% compared to ordinary multi-element liquid fertilizers, while silicon and titanium absorption rates are increased by 40-60%, achieving precise nutrient supply. Furthermore, the biostimulants (a combination of seaweed extract and amino acid oligosaccharides) work synergistically with multiple elements, not only providing comprehensive nutrition to crops but also enhancing their resistance to stress. Under drought stress, the survival rate of wheat increased by 25-30% compared to the water control group and by 15-20% compared to the ordinary liquid fertilizer group; at the same time, it improved crop quality, with the vitamin C content of tomatoes increasing by 15-20%. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0019] Example 1 This embodiment provides a raw material composition for a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer. The raw material composition, by mass percentage, is as follows: 20% nano-silica sol (particle size 4-17nm), 5% nano-titanium sol (particle size 3-10nm), 30% calcium nitrate, 10% magnesium nitrate, 0.5% zinc nitrate, 5.0% composite chelating agent (composite amino acids:alginic acid:humic acid = 3:2:1), 10% biostimulant (alginic oligosaccharide:glutamic acid oligosaccharide = 2:1), 1% polyethylene glycol-6000, 0.5% sodium hydroxide, and 18% deionized water.

[0020] The preparation method includes the following steps: (1) Preparation of nano-titanium sol: Dissolve 10g of nano-titanium dioxide in 50g of anhydrous ethanol and stir evenly; Under the conditions of constant temperature at 80℃ and stirring rate of 200r / min, slowly add 4.5g of deionized water to the nano-titanium dioxide ethanol solution at a dropping rate of 1mL / min. After the addition is completed, continue stirring for 1h, add 0.5g of citric acid, and continue stirring for 30min to obtain nano-titanium sol; (2) Preparation of composite chelation mother liquor: Add 180g of deionized water to the reaction vessel, heat to 80℃, add 50g of composite chelating agent, and stir until completely dissolved; then add 300g of calcium nitrate, 100g of magnesium nitrate and 5g of zinc nitrate in sequence. Stir the reaction for 8 hours after each addition of raw material at a stirring rate of 150r / min to obtain composite chelation mother liquor; (3) Preparation of nano-synergistic dispersion: Add 200g of nano-silica sol and 50g of nano-titanium sol prepared in step 1 to the composite chelation mother liquor, add 10g of polyethylene glycol-6000, heat to 50℃, increase the stirring rate to 500r / min, stir for 2h, and at the same time use 150W ultrasonic dispersion for 30min to obtain nano-synergistic dispersion; (4) Compounding and adjustment: Add 100g of biostimulant to the nano-synergistic dispersion and stir for 1h; add 5g of sodium hydroxide to adjust the pH of the system to 5.5~6.0 and continue stirring for 30min; (5) Filtration and maturation: After filtration through a 0.22μm microporous membrane, the filtered solution was placed in a maturation tank and matured at 80℃ for 48h to obtain a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer.

[0021] Example 2 This embodiment provides a raw material composition for a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer. By mass percentage, the raw material composition is as follows: 20% nano-silica sol (particle size 4-17nm), 5% nano-titanium sol (particle size 3-10nm), 30% calcium chloride, 10% magnesium chloride, 2% zinc chloride, 12.0% composite chelating agent (composite amino acids:alginic acid:humic acid = 3:2:1), 15% biostimulant (alginic oligosaccharide:glycine oligosaccharide = 2:1), 3% sodium dodecylbenzenesulfonate, 2% dipotassium hydrogen phosphate, and 1% deionized water.

[0022] The preparation method includes the following steps: (1) Preparation of nano-titanium sol: Dissolve 20g tetrabutyl titanate in 160g anhydrous ethanol and stir evenly; under constant temperature of 80℃ and stirring rate of 300r / min, slowly add 18g deionized water to the tetrabutyl titanate ethanol solution at a dropping rate of 2mL / min. After the addition is complete, continue stirring for 2h, add 2g citric acid, and continue stirring for 60min to obtain nano-titanium sol; (2) Preparation of composite chelation mother liquor: Add 10g of deionized water to the reaction vessel, heat to 150℃, add 120g of composite chelating agent, and stir until completely dissolved; then add 300g of calcium chloride, 100g of magnesium chloride and 20g of zinc chloride in sequence. Stir the reaction for 15h after each addition of raw material at a stirring rate of 80r / min to obtain composite chelation mother liquor; (3) Preparation of nano-synergistic dispersion: Add 50g of nano-silica sol and 200g of nano-titanium sol prepared in step 1 to the composite chelation mother liquor, add 30g of sodium dodecylbenzenesulfonate, heat to 80℃, increase the stirring rate to 300r / min, stir for 3h, and at the same time use 200W ultrasonic dispersion for 60min to obtain nano-synergistic dispersion. (4) Compounding and adjustment: Add 150g of biostimulant to the nano-synergistic dispersion and stir for 2h; add 20g of dipotassium hydrogen phosphate, adjust the pH of the system to 6.5~7.0, and continue stirring for 60min; (5) Filtration and maturation: After filtration through a 0.22μm microporous membrane, the filtered solution was placed in a maturation tank and matured at 120℃ for 24h to obtain a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer.

[0023] Example 3 This embodiment provides a raw material composition for a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer. By mass percentage, the raw material composition is as follows: 25% nano-silica sol (particle size 4-17nm), 5% nano-titanium sol (particle size 3-10nm), 35% calcium nitrate, 10% magnesium chloride, 1% zinc nitrate, 8% composite chelating agent (composite amino acid:alginic acid:humic acid = 3:2:1), 10% biostimulant (alginic oligosaccharide:glutamic acid oligosaccharide = 2:1), 2% polyethylene glycol-6000, 1% sodium hydroxide, and 3% deionized water.

[0024] The preparation method includes the following steps: (1) Preparation of nano-titanium sol: Dissolve 10g tetrabutyl titanate in 50g anhydrous ethanol and stir evenly; under constant temperature of 80℃ and stirring rate of 200r / min, slowly add 4.5g deionized water to the tetrabutyl titanate ethanol solution at a dropping rate of 1mL / min. After the addition is complete, continue stirring for 1h, add 0.5g citric acid, and continue stirring for 30min to obtain nano-titanium sol; (2) Preparation of composite chelation mother liquor: Add 30g of deionized water to the reaction vessel, heat to 110℃, add 80g of composite chelating agent, and stir until completely dissolved; then add 350g of calcium nitrate, 100g of magnesium chloride, and 10g of zinc nitrate in sequence. Stir the reaction for 12h after each addition of raw material at a stirring rate of 110r / min to obtain composite chelation mother liquor; (3) Preparation of nano-synergistic dispersion: Add 250g of nano-silica sol and 50g of nano-titanium sol prepared in step 1 to the composite chelation mother liquor, add 20g of polyethylene glycol-6000, heat to 65℃, increase the stirring rate to 400r / min, stir for 2h, and at the same time use 150W ultrasonic dispersion for 30min to obtain nano-synergistic dispersion; (4) Compounding and adjustment: Add 100g of biostimulant to the nano-synergistic dispersion and stir for 1h; add 10g of sodium hydroxide to adjust the pH of the system to 5.5~6.0 and continue stirring for 30min; (5) Filtration and maturation: After filtration through a 0.22μm microporous membrane, the filtered solution was placed in a maturation tank and matured at 100℃ for 36h to obtain a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer.

[0025] Detection example The performance of the nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizers prepared in Examples 1-3 was tested, and the results are as follows: 1. Stability test: After 12 months of sealed storage at room temperature, there was no precipitation or stratification, and the light transmittance remained above 85%.

[0026] 2. Nutrient availability test: A hydroponic experiment was conducted with wheat as the test crop. Compared with ordinary multi-element liquid fertilizer, the absorption rate of calcium, magnesium and zinc of the liquid fertilizer of this invention was increased by 35-50%, and the absorption rate of silicon and titanium was increased by 40-60%.

[0027] 3. Stress resistance test: Under drought stress conditions, the survival rate of wheat sprayed with the liquid fertilizer of this invention increased by 25-30% compared with the control group (sprayed with water) and by 15-20% compared with the experimental group sprayed with ordinary multi-element liquid fertilizer.

[0028] 4. Yield test: In tomato cultivation, the tomato yield of tomatoes sprayed with the liquid fertilizer of this invention increased by 20-25% compared with the control group, and the vitamin C content of tomatoes increased by 15-20%.

[0029] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A nano-synergistic chelated liquid fertilizer of silicon, titanium, calcium, magnesium, and zinc, characterized in that, The raw materials include the following percentages by weight: nano-silicon source 20.0-50.0%, titanium source 5.0-20.0%, calcium source 30.0-50.0%, magnesium source 10.0-20.0%, zinc source 0.5-2.0%, compound chelating agent 5.0-12.0%, biostimulant 10.0-15.0%, dispersant 1.0-3.0%, pH adjuster 0.5-2.0%, and the balance being deionized water.

2. The nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer according to claim 1, characterized in that, The raw materials include the following percentages by weight: 20% nano-silicon source, 5% titanium source, 30% calcium source, 10% magnesium source, 0.5% zinc source, 5.0% composite chelating agent, 10% biostimulant, 1% dispersant, 0.5% pH adjuster, and the balance being deionized water.

3. The nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer according to claim 1 or 2, characterized in that, The nano-silicon source is nano-silica sol with a particle size of 4-17 nm. And / or, the titanium source is tetrabutyl titanate or nano-titanium sol modified by hydrolysis of nano-sized titanium dioxide sol, with a particle size of 3-10 nm; And / or, the calcium source is calcium nitrate or calcium chloride; And / or, the magnesium source is magnesium nitrate or magnesium chloride; And / or, the zinc source is zinc nitrate or zinc chloride.

4. The nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer according to claim 1 or 2, characterized in that, The composite chelating agent is composed of composite amino acids, alginic acid, and humic acid in a mass ratio of 3:2:

1. And / or, the biostimulant is a compound of seaweed extract and amino acid oligosaccharide in a mass ratio of 2:1; And / or, the dispersant is one of polyethylene glycol-6000, sodium dodecylbenzenesulfonate, protein polypeptide-based dispersant, and rhamnolipid; And / or, the pH adjuster is sodium hydroxide or dipotassium hydrogen phosphate, used to adjust the pH of the liquid fertilizer to 5.5~7.

0.

5. The nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer according to claim 4, characterized in that, The seaweed extract is an enzymatically hydrolyzed oligosaccharide from brown algae, with a molecular weight of 1000-3000 Da. And / or, the amino acid oligosaccharide is a glutamic acid oligosaccharide or a glycine oligosaccharide with a molecular weight of 1000-3000 Da.

6. The method for preparing the nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer according to any one of claims 1-5, characterized in that, The preparation method includes the following steps: (1) Preparation of nano-titanium sol: Tetrabutyl titanate or nano-titanium dioxide is dissolved in anhydrous ethanol and stirred evenly to obtain a tetrabutyl titanate or nano-titanium dioxide ethanol solution; deionized water is added to the tetrabutyl titanate or nano-titanium dioxide ethanol solution, and stirring is continued after completion. Citric acid is then added and stirring is continued to obtain modified nano-titanium sol, i.e. titanium source. (2) Preparation of composite chelation mother liquor: Heat deionized water, add composite chelating agent, and then add calcium source, magnesium source and zinc source in sequence to obtain composite chelation mother liquor; (3) Preparation of nano-synergistic dispersion: Add nano-silicon source and nano-titanium sol to the composite chelation mother liquor, add dispersant and heat and stir, and at the same time use ultrasonic dispersion treatment to obtain nano-synergistic dispersion; (4) Compounding and adjustment: Add biostimulant to the nano-synergistic dispersion and stir to mix, then add pH adjuster and continue stirring to obtain compound solution; (5) Filtration and maturation: The compound solution is filtered to remove impurities, and then the filtered solution is matured to obtain a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer.

7. The method for preparing the nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer according to claim 6, characterized in that, In step (1), tetrabutyl titanate or nano-titanium dioxide is dissolved in anhydrous ethanol and stirred evenly to obtain a tetrabutyl titanate or nano-titanium dioxide ethanol solution with a mass concentration of 10-20%. Under the conditions of constant temperature of 80-120℃ and stirring rate of 200-300r / min, deionized water is added dropwise to the tetrabutyl titanate or nano-titanium dioxide ethanol solution at a dropping rate of 1-2mL / min. After the addition is completed, stirring is continued for 1-2h. Then, citric acid accounting for 5-10% of the mass of tetrabutyl titanate or nano-titanium dioxide is added, and stirring is continued for 30-60min to obtain nano-titanium sol.

8. The method for preparing the nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer according to claim 6, characterized in that, In step (2), deionized water is added to the reaction vessel and heated to 80-150℃. The composite chelating agent is added and stirred until completely dissolved. Then, calcium source, magnesium source and zinc source are added in sequence. After each raw material is added, the reaction is stirred for 8-15 hours and the stirring rate is controlled at 80-150 r / min to obtain the composite chelating mother liquor.

9. The method for preparing the nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer according to claim 6, characterized in that, In step (3), nano-silicon source and nano-titanium sol are added to the composite chelate mother liquor, along with a dispersant. The temperature is raised to 50-80℃, the stirring rate is increased to 300-500r / min, and the mixture is stirred for 2-3 hours. At the same time, ultrasonic dispersion is performed with an ultrasonic power of 150-200W and a dispersion time of 30-60 minutes to obtain a nano-synergistic dispersion.

10. The method for preparing the nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer according to claim 6, characterized in that: In step (4), a biostimulant is added to the nano-co-dispersed solution and stirred for 1-2 hours until completely mixed; then a pH adjuster is added to adjust the pH of the system to 5.5-7.0, and stirring is continued for 30-60 minutes to obtain the compound solution; In step (5), the compound solution is filtered through a 0.22μm microporous membrane to remove impurities; the filtered solution is placed in a maturation tank and matured at 80-120℃ for 24-48h to obtain a nano-synergistic chelated silicon-titanium-calcium-magnesium-zinc liquid fertilizer.