High-calcium suspending fertilizer, preparation method and application thereof

Abstract

This invention discloses a high-calcium suspension fertilizer, its preparation method, and its application, relating to the field of fertilizer production technology. By weight, it comprises 20-30 parts of macro-element fertilizer, 10-15 parts of medium-element fertilizer, 3-5 parts of micro-element fertilizer, 0.5-3 parts of auxiliary agent, and 30-50 parts of deionized water. The macro-element fertilizer consists of 30-50 parts of nitrogen fertilizer, 20-30 parts of phosphorus fertilizer, and 15-20 parts of potassium fertilizer. The medium-element fertilizer is modified nano-calcium carbonate and magnesium carbonate. The micro-element fertilizer consists of zinc amino acid, sodium tetraborate, sodium iron ethylenediaminetetraacetate, sodium molybdenum ethylenediaminetetraacetate, manganese sulfate monohydrate, and copper sulfate pentahydrate. Through this method, nano-calcium carbonate can be rapidly absorbed by plants, enabling timely replenishment of calcium ions during plant growth and accelerating plant growth.

Description

Technical Field

[0001] This invention belongs to the field of fertilizer production technology, specifically relating to a high-calcium suspension fertilizer, its preparation method, and its application. Background Technology

[0002] Suspension fertilizer is a highly concentrated liquid fertilizer that stably suspends nano- or micron-sized nutrient particles in a liquid, forming a uniform, viscous system that provides high-concentration nutrients and is suitable for the needs of modern fertigation agriculture.

[0003] To quickly supplement calcium for crops, high-calcium fertilizers are often sprayed onto plants, allowing them to obtain calcium in a short period. However, existing calcium sources often use calcium nitrate or calcium chloride. Calcium nitrate has a relatively low calcium content, making it difficult to quickly replenish the calcium needed by plants. While calcium chloride has a high calcium content, it is difficult to use on chlorine-sensitive crops (such as tobacco). Furthermore, existing calcium sources are not easily absorbed quickly by plant leaves, making it difficult for plants to rapidly replenish calcium ions. Summary of the Invention

[0004] To address the above-mentioned shortcomings, the purpose of this invention is to provide a high-calcium suspension fertilizer, its preparation method, and its application, aiming to solve the problem that the existing calcium sources in suspension fertilizers are difficult to be quickly absorbed by plant leaves.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A high-calcium suspension fertilizer, by weight, comprises 20-30 parts of macro-element fertilizer, 10-15 parts of medium-element fertilizer, 3-5 parts of micro-element fertilizer, 0.5-3 parts of auxiliary agent, and 30-50 parts of deionized water;

[0007] The macro-element fertilizer consists of 30-50 parts nitrogen fertilizer, 20-30 parts phosphorus fertilizer, and 15-20 parts potassium fertilizer;

[0008] The medium-element fertilizer is composed of 50-60 parts modified nano-calcium carbonate and 40-50 parts magnesium carbonate;

[0009] The micronutrient fertilizer is composed of zinc amino acid, sodium tetraborate, sodium iron ethylenediaminetetraacetate, sodium molybdenum ethylenediaminetetraacetate, manganese sulfate monohydrate, and copper sulfate pentahydrate.

[0010] The nitrogen fertilizer is urea; the phosphate fertilizer is superphosphate; and the potassium fertilizer is potassium nitrate.

[0011] The micronutrient fertilizer is composed of 20-40 parts of zinc amino acid, 1-2 parts of sodium molybdenum ethylenediaminetetraacetate, 10-20 parts of sodium tetraborate, 10-20 parts of sodium iron ethylenediaminetetraacetate, 3-8 parts of manganese sulfate monohydrate, and 20-40 parts of copper sulfate pentahydrate.

[0012] The auxiliary agent is composed of 10-15 parts dispersant, 10-15 parts penetrant, 5-8 parts thickener, 20-30 parts silicon quantum dots, 10-20 parts chitosan, 25-30 parts acetic acid, 3-5 parts antifreeze and 30-40 parts deionized water.

[0013] The dispersant is composed of 40-50 parts of methylnaphthalene sulfonate, 20-30 parts of sodium dodecylbenzene sulfonate, 10-20 parts of fatty alcohol polyoxyethylene ether and 10-20 parts of polyvinylpyrrolidone.

[0014] The penetrant is composed of 40-50 parts fatty alcohol polyoxyethylene ether, 30-40 parts orange peel essential oil, and 5-10 parts ethoxylated modified polytrisiloxane.

[0015] The thickener is composed of 20-30 parts sepiolite powder, 40-50 parts xanthan gum, and 10-20 parts carboxymethyl cellulose.

[0016] The antifreeze is ethylene glycol or glycerol.

[0017] One method for preparing a high-calcium suspension fertilizer includes the following steps:

[0018] Step 1: The macro-element fertilizer, medium-element fertilizer and micro-element fertilizer are sequentially fed into an ultra-fine pulverizer for pulverization. Then, the pulverized macro-element fertilizer, medium-element fertilizer and micro-element fertilizer are fed into a mixing tank for mixing to obtain a mixed fertilizer, wherein the particle size D90 of the mixed fertilizer is <2μm.

[0019] Step 2: Mix the mixed fertilizer with deionized water, adding auxiliary agents dropwise during the mixing process. The mixing speed is 500-800 r / min, and the mixing time is 20-40 min to obtain the activation solution.

[0020] Step 3: Send the activated liquid to a high-speed shear emulsifier, pre-disperse it at 2000-3000 r / min for 10-20 min, and then shear and mix it at 8000-10000 r / min for 30-50 min to obtain a suspension fertilizer solution;

[0021] Step four: The suspension fertilizer solution is filled and sealed to obtain high-calcium suspension fertilizer.

[0022] One method for applying high-calcium suspension fertilizer includes the following steps:

[0023] S1, 5-7 days before flowering: Mix high-calcium suspension fertilizer with water at a weight ratio of 1:300-1500, stir well and then spray on the leaves.

[0024] S2, 10-12 days after flowering: Mix high-calcium suspension fertilizer with water at a weight ratio of 1:1500-2000, stir well and then spray on the leaves.

[0025] S3, young fruit stage: Mix high-calcium suspension fertilizer with water at a weight ratio of 1:1000-1500, stir well and then spray on the leaves.

[0026] Spraying time is 6:00-9:00 AM or 4:00-6:00 PM. Spray until the leaves are moist but not dripping. If it rains after spraying, re-spraying is required.

[0027] The beneficial effects of adopting the above technical solution are as follows:

[0028] First, nano-calcium carbonate can be rapidly absorbed by plants, allowing them to replenish calcium ions in a timely manner during growth and accelerating plant growth. Second, with the help of dispersants, the various particles in the suspension fertilizer are evenly dispersed, preventing particle aggregation. Third, with the combined action of thickeners and superphosphate, calcium is released slowly, making the fertilizer more long-lasting and effective. Fourth, with the assistance of silicon quantum dots, various nutrients can be rapidly absorbed by the leaves, while improving photosynthetic efficiency. Detailed Implementation

[0029] A high-calcium suspension fertilizer, by weight, comprises 20-30 parts of macro-element fertilizer, 10-15 parts of medium-element fertilizer, 3-5 parts of micro-element fertilizer, 0.5-3 parts of auxiliary agent, and 30-50 parts of deionized water;

[0030] The macro-element fertilizer consists of 30-50 parts nitrogen fertilizer, 20-30 parts phosphorus fertilizer, and 15-20 parts potassium fertilizer;

[0031] The medium-element fertilizer is composed of 50-60 parts modified nano-calcium carbonate and 40-50 parts magnesium carbonate;

[0032] The micronutrient fertilizer is composed of zinc amino acid, sodium tetraborate, sodium iron ethylenediaminetetraacetate, sodium molybdenum ethylenediaminetetraacetate, manganese sulfate monohydrate, and copper sulfate pentahydrate.

[0033] The nitrogen fertilizer is urea; the phosphate fertilizer is superphosphate; and the potassium fertilizer is potassium nitrate.

[0034] By weight, the micronutrient fertilizer is composed of 20-40 parts of zinc amino acid, 1-2 parts of sodium molybdenum ethylenediaminetetraacetate, 10-20 parts of sodium tetraborate, 10-20 parts of sodium iron ethylenediaminetetraacetate, 3-8 parts of manganese sulfate monohydrate, and 20-40 parts of copper sulfate pentahydrate.

[0035] This solution uses nano-calcium carbonate as the calcium source. Due to its high specific surface area, excellent dispersibility, high permeability, and rapid solubility, it can be quickly absorbed and utilized by plants, providing them with the necessary calcium ions in a short time. Superphosphate, on the other hand, is absorbed by plants much slower than nano-calcium carbonate, thus providing a slow and sustained calcium source. In other words, nano-calcium carbonate provides rapid calcium supplementation, while superphosphate provides slow and sustained calcium supplementation; the two used together effectively complement each other.

[0036] The auxiliary agent, by weight, is composed of 10-15 parts dispersant, 10-15 parts penetrant, 5-8 parts thickener, 20-30 parts silicon quantum dots, 10-20 parts chitosan, 25-30 parts acetic acid, 3-5 parts antifreeze and 30-40 parts deionized water.

[0037] When silicon quantum dots are applied to plant leaves, they can enhance photosynthesis through quantum effects and improve the efficiency of nutrient absorption and utilization by plant leaves. Simultaneously, as nanocarriers, they can accelerate the entry of nutrients into the leaves, providing controlled-release functionality.

[0038] The dispersant, by weight, is composed of 40-50 parts methylnaphthalene sulfonate, 20-30 parts sodium dodecylbenzene sulfonate, 10-20 parts fatty alcohol polyoxyethylene ether, and 10-20 parts polyvinylpyrrolidone. The dispersant's function is to maintain the uniform dispersion of fertilizer particles in the liquid, preventing particle agglomeration while maintaining suspension stability.

[0039] By weight, the penetrant is composed of 40-50 parts fatty alcohol polyoxyethylene ether, 30-40 parts orange peel essential oil, and 5-10 parts ethoxylated modified polytrisiloxane. The penetrant effectively improves the wettability, adhesion, and penetration of fertilizers.

[0040] Orange peel essential oil is a natural penetrant extracted from citrus peels, with its main component being d-limonene (content can reach over 90%). It not only has excellent permeability (contact angle can be reduced to below 30°), but also possesses biodegradability and environmentally friendly properties.

[0041] The thickener is composed of 20-30 parts sepiolite powder, 40-50 parts xanthan gum, and 10-20 parts carboxymethyl cellulose. The thickener's function is to increase the system viscosity, enhance adhesion, and reduce particle stratification or sedimentation caused by gravity.

[0042] The antifreeze is ethylene glycol or glycerol.

[0043] A method for preparing a high-calcium suspension fertilizer includes the following steps:

[0044] Step 1: The macro-element fertilizer, medium-element fertilizer and micro-element fertilizer are sequentially fed into an ultra-fine pulverizer for pulverization. Then, the pulverized macro-element fertilizer, medium-element fertilizer and micro-element fertilizer are fed into a mixing tank for mixing to obtain a mixed fertilizer, wherein the particle size D90 of the mixed fertilizer is <2μm.

[0045] Step 2: Mix the mixed fertilizer with deionized water, adding auxiliary agents dropwise during the mixing process. The mixing speed is 500-800 r / min, and the mixing time is 20-40 min to obtain the activation solution.

[0046] Step 3: Send the activated liquid to a high-speed shear emulsifier, pre-disperse it at 2000-3000 r / min for 10-20 min, and then shear and mix it at 8000-10000 r / min for 30-50 min to obtain a suspension fertilizer solution;

[0047] Step four: The suspension fertilizer solution is filled and sealed to obtain high-calcium suspension fertilizer.

[0048] A method for applying a high-calcium suspension fertilizer includes the following steps:

[0049] S1, 5-7 days before flowering: Mix high-calcium suspension fertilizer with water at a weight ratio of 1:300-1500, stir well and then spray on the leaves.

[0050] S2, 10-12 days after flowering: Mix high-calcium suspension fertilizer with water at a weight ratio of 1:1500-2000, stir well and then spray on the leaves.

[0051] S3, young fruit stage: Mix high-calcium suspension fertilizer with water at a weight ratio of 1:1000-1500, stir well and then spray on the leaves.

[0052] Spraying time is 6:00-9:00 AM or 4:00-6:00 PM. Spray until the leaves are moist but not dripping. If it rains after spraying, re-spraying is required.

[0053] Example 1:

[0054] The high-calcium suspension fertilizer is produced according to the above formula and steps. It consists of 20 parts by weight of macro-element fertilizer, 10 parts by weight of medium-element fertilizer, 3 parts by weight of micro-element fertilizer, 0.5 parts by weight of auxiliary agent and 30 parts by weight of deionized water.

[0055] The macro-element fertilizer consists of 30 parts nitrogen fertilizer, 20 parts phosphorus fertilizer and 15 parts potassium fertilizer;

[0056] The medium-element fertilizer is composed of 50 parts modified nano calcium carbonate and 40 parts magnesium carbonate.

[0057] By weight, the micronutrient fertilizer consists of 20 parts zinc amino acid, 1 part sodium molybdenum ethylenediaminetetraacetate, 10 parts sodium tetraborate, 10 parts sodium iron ethylenediaminetetraacetate, 3 parts manganese sulfate monohydrate, and 20 parts copper sulfate pentahydrate.

[0058] The auxiliary agent, by weight, is composed of 10 parts dispersant, 10 parts penetrant, 5 parts thickener, 20 parts silicon quantum dots, 10 parts chitosan, 25 parts acetic acid, 3 parts antifreeze and 30 parts deionized water.

[0059] The dispersant, by weight, is composed of 40 parts methylnaphthalene sulfonate, 20 parts sodium dodecylbenzene sulfonate, 10 parts fatty alcohol polyoxyethylene ether, and 10 parts polyvinylpyrrolidone.

[0060] The penetrant, by weight, is composed of 40 parts fatty alcohol polyoxyethylene ether, 30 parts orange peel essential oil, and 5 parts ethoxylated modified polytrisiloxane.

[0061] The thickener is composed of 20 parts sepiolite powder, 40 parts xanthan gum and 10 parts carboxymethyl cellulose.

[0062] The antifreeze is ethylene glycol.

[0063] In step two, the stirring speed is 500 r / min and the stirring time is 20 min to obtain the activation solution;

[0064] In step three, the activated liquid is sent to a high-speed shear emulsifier, pre-dispersed at 2000 r / min for 10 min, and then sheared and mixed at 8000 r / min for 30 min to obtain a suspension fertilizer solution.

[0065] Example 2:

[0066] The difference between this embodiment and Embodiment 1 is that:

[0067] By weight, it consists of 24 parts macronutrient fertilizer, 12 parts medium-nutrient fertilizer, 3.5 parts micronutrient fertilizer, 1 part auxiliary agent, and 35 parts deionized water.

[0068] The macro-element fertilizer consists of 35 parts nitrogen fertilizer, 24 parts phosphorus fertilizer and 14 parts potassium fertilizer;

[0069] The medium-element fertilizer is composed of 54 parts modified nano-calcium carbonate and 44 parts magnesium carbonate.

[0070] By weight, the micronutrient fertilizer consists of 25 parts zinc amino acid, 1.4 parts sodium molybdenum ethylenediaminetetraacetate, 17.3 parts sodium tetraborate, 17.3 parts sodium iron ethylenediaminetetraacetate, 6 parts manganese sulfate monohydrate, and 25 parts copper sulfate pentahydrate.

[0071] The auxiliary agent, by weight, is composed of 11 parts dispersant, 11 parts penetrant, 5.5 parts thickener, 24 parts silicon quantum dots, 14 parts chitosan, 26 parts acetic acid, 3.5 parts antifreeze and 34 parts deionized water.

[0072] The dispersant, by weight, is composed of 44 parts methylnaphthalene sulfonate, 24 parts sodium dodecylbenzene sulfonate, 14 parts fatty alcohol polyoxyethylene ether, and 14 parts polyvinylpyrrolidone.

[0073] The penetrant, by weight, is composed of 44 parts fatty alcohol polyoxyethylene ether, 34 parts orange peel essential oil, and 6 parts ethoxylated modified polytrisiloxane.

[0074] The thickener is composed of 24 parts sepiolite powder, 44 parts xanthan gum and 14 parts carboxymethyl cellulose.

[0075] The antifreeze is glycerol.

[0076] In step two, the stirring speed is 600 r / min and the stirring time is 24 min to obtain the activation solution;

[0077] In step three, the activated liquid is sent to a high-speed shear emulsifier, pre-dispersed at 2400 r / min for 14 min, and then sheared and mixed at 8500 r / min for 35 min to obtain a suspension fertilizer solution.

[0078] Example 3:

[0079] The difference between this embodiment and Embodiment 1 is that:

[0080] By weight, it consists of 28 parts macronutrient fertilizer, 13 parts medium-nutrient fertilizer, 4 parts micronutrient fertilizer, 2 parts auxiliary agent and 45 parts deionized water.

[0081] The macro-element fertilizer consists of 45 parts nitrogen fertilizer, 28 parts phosphorus fertilizer and 18 parts potassium fertilizer;

[0082] The medium-element fertilizer is composed of 58 parts modified nano-calcium carbonate and 48 parts magnesium carbonate.

[0083] By weight, the micronutrient fertilizer consists of 35 parts of zinc amino acid, 1.8 parts of sodium molybdenum ethylenediaminetetraacetate, 18 parts of sodium tetraborate, 18 parts of sodium iron ethylenediaminetetraacetate, 5 parts of manganese sulfate monohydrate, and 35 parts of copper sulfate pentahydrate.

[0084] The auxiliary agent, by weight, is composed of 13 parts dispersant, 13 parts penetrant, 6 parts thickener, 28 parts silicon quantum dots, 18 parts chitosan, 28 parts acetic acid, 4 parts antifreeze and 38 parts deionized water.

[0085] The dispersant, by weight, is composed of 48 parts methylnaphthalene sulfonate, 28 parts sodium dodecylbenzene sulfonate, 18 parts fatty alcohol polyoxyethylene ether, and 18 parts polyvinylpyrrolidone.

[0086] The penetrant, by weight, is composed of 48 parts fatty alcohol polyoxyethylene ether, 38 parts orange peel essential oil, and 8 parts ethoxylated modified polytrisiloxane.

[0087] The thickener is composed of 28 parts sepiolite powder, 48 parts xanthan gum and 18 parts carboxymethyl cellulose.

[0088] The antifreeze is glycerol.

[0089] In step two, the stirring speed is 700 r / min and the stirring time is 30 min to obtain the activation solution;

[0090] In step three, the activated liquid is sent to a high-speed shear emulsifier, pre-dispersed at 2800 r / min for 18 min, and then sheared and mixed at 9500 r / min for 45 min to obtain a suspension fertilizer solution.

[0091] Example 4:

[0092] The difference between this embodiment and Embodiment 1 is that:

[0093] By weight, it consists of 30 parts macronutrient fertilizer, 15 parts medium-nutrient fertilizer, 5 parts micronutrient fertilizer, 3 parts auxiliary agent and 50 parts deionized water.

[0094] The macro-element fertilizer consists of 50 parts nitrogen fertilizer, 30 parts phosphorus fertilizer and 20 parts potassium fertilizer;

[0095] The medium-element fertilizer is composed of 60 parts modified nano-calcium carbonate and 50 parts magnesium carbonate;

[0096] By weight, the micronutrient fertilizer consists of 40 parts of zinc amino acid, 2 parts of sodium molybdenum ethylenediaminetetraacetate, 20 parts of sodium tetraborate, 20 parts of sodium iron ethylenediaminetetraacetate, 8 parts of manganese sulfate monohydrate, and 40 parts of copper sulfate pentahydrate.

[0097] The auxiliary agent, by weight, is composed of 15 parts dispersant, 15 parts penetrant, 8 parts thickener, 30 parts silicon quantum dots, 20 parts chitosan, 30 parts acetic acid, 5 parts antifreeze and 40 parts deionized water.

[0098] The dispersant, by weight, is composed of 50 parts methylnaphthalene sulfonate, 30 parts sodium dodecylbenzene sulfonate, 20 parts fatty alcohol polyoxyethylene ether, and 20 parts polyvinylpyrrolidone.

[0099] The penetrant, by weight, is composed of 50 parts fatty alcohol polyoxyethylene ether, 40 parts orange peel essential oil, and 10 parts ethoxylated modified polytrisiloxane.

[0100] The thickener is composed of 30 parts sepiolite powder, 50 parts xanthan gum and 20 parts carboxymethyl cellulose.

[0101] The antifreeze is ethylene glycol.

[0102] In step two, the stirring speed is 800 r / min and the stirring time is 40 min to obtain the activation solution;

[0103] In step three, the activated liquid is sent to a high-speed shear emulsifier, pre-dispersed at 3000 r / min for 20 min, and then sheared and mixed at 10000 r / min for 50 min to obtain a suspension fertilizer solution.

[0104] Comparative Example 1:

[0105] The difference between this comparative example and Example 1 is that nano-calcium carbonate was not used.

[0106] Comparative Example 2:

[0107] The difference between this comparative example and Example 1 is that the phosphate fertilizer is ammonium phosphate.

[0108] Comparative Example 3:

[0109] The difference between this comparative example and Example 1 is that silicon quantum dots were not used.

[0110] Using chili peppers as the subject, the high-calcium suspension fertilizer products from Examples 1-4 and Comparative Examples 1-3 were selected, and three types of suspension fertilizers, A, B and C, were purchased from the market. Among them, the commercial name of A is Topcal, and its manufacturer is Miragro International Co., Ltd. of Italy. Its main components (g / L) are: calcium (232g), boron (1.3g) and magnesium (1g).

[0111] Product B is marketed as Baishi Calcium, manufactured by Japan Global Systems Co., Ltd., with calcium formate as its main raw material. Registered technical specifications: Ca≥10%.

[0112] C's product name is Microdoli, and its manufacturer is Adolm GmbH in Poland. Its main technical specifications are: Ca (6.5%), Zn (0.2%), Cu (0.1%), B (0.5%), Mg (3.5%), Fe (0.1%), Mn (0.05%), and Mo (0.1%).

[0113] Taking the period before chili pepper flowering as an example, 5-7 days before the chili peppers bloom, mix high-calcium suspension fertilizer with water at a weight ratio of 1:300-1500, stir well, and then spray the chili pepper leaves. The spraying time is between 6:00 and 9:00 in the morning.

[0114] After spraying, samples were taken from the chili pepper leaves to test their calcium content (mg / 100g). The results are shown in the table below:

[0115]

[0116] As can be seen from the table above, since Examples 1-4 used a combination of nano-calcium carbonate and superphosphate, and silicon quantum dots assisted in the absorption of nutrients, the calcium content was highest on September 8, and then gradually decreased from September 9 to September 14.

[0117] Comparative Example 1, without the addition of nano-calcium carbonate, still had a lower calcium content than Examples 1-4 on September 8, even with the assistance of silicon quantum dots. From September 9 to September 14, although the calcium content in the leaves was still lower than that in Examples 1-4, the rate of decrease was relatively slow. Analysis showed that this was because calcium ions were slowly released under the combined action of the thickener and superphosphate.

[0118] Comparative Example 2 did not use superphosphate, so its content on September 8th was close to that of Examples 1-4. However, due to the poor slow-release effect, the calcium content in the leaves decreased more rapidly.

[0119] Comparative Example 3, due to the absence of silicon quantum dots, exhibited a slower initial calcium ion absorption rate. A comparison with Examples 1-4 on the same date revealed that the calcium content in the leaves of Comparative Example 3 was lower than that in the leaves of Examples 1-4 on the same date, but the calcium content did not show a precipitous drop.

[0120] Compared with fertilizers A, B, and C, Examples 1-4 have higher calcium ion content. In addition, Examples 1-4 have better slow-release effect compared with suspension fertilizers A and C.

[0121] In summary, this solution offers the following advantages: First, nano-calcium carbonate can be rapidly absorbed by plants, allowing for timely replenishment of calcium ions during plant growth and accelerating growth. Second, the dispersant ensures uniform dispersion of various particles in the suspension fertilizer, preventing particle aggregation. Third, the combined action of the thickener and superphosphate allows for slow release of calcium, resulting in more sustained and effective fertilization. Fourth, with the assistance of silicon quantum dots, various nutrients can be rapidly absorbed by the leaves, simultaneously improving photosynthetic efficiency.

[0122] This invention is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort are within the scope of protection of this invention.

Claims

1. A high calcium suspended fertilizer, characterized by, By weight, it includes 20-30 parts of macronutrient fertilizer, 10-15 parts of medium-nutrient fertilizer, 3-5 parts of micronutrient fertilizer, 0.5-3 parts of adjuvant, and 30-50 parts of deionized water; The macro-element fertilizer consists of 30-50 parts nitrogen fertilizer, 20-30 parts phosphorus fertilizer, and 15-20 parts potassium fertilizer; The medium-element fertilizer is composed of 50-60 parts modified nano-calcium carbonate and 40-50 parts magnesium carbonate; The micronutrient fertilizer is composed of zinc amino acid, sodium tetraborate, sodium iron ethylenediaminetetraacetate, sodium molybdenum ethylenediaminetetraacetate, manganese sulfate monohydrate, and copper sulfate pentahydrate. By weight, the micronutrient fertilizer is composed of 20-40 parts of zinc amino acid, 1-2 parts of sodium molybdenum ethylenediaminetetraacetate, 10-20 parts of sodium tetraborate, 10-20 parts of sodium iron ethylenediaminetetraacetate, 3-8 parts of manganese sulfate monohydrate, and 20-40 parts of copper sulfate pentahydrate. By weight, the auxiliary agent is composed of 10-15 parts dispersant, 10-15 parts penetrant, 5-8 parts thickener, 20-30 parts silicon quantum dots, 10-20 parts chitosan, 25-30 parts acetic acid, 3-5 parts antifreeze and 30-40 parts deionized water. The dispersant is composed of 40-50 parts of methylnaphthalene sulfonate, 20-30 parts of sodium dodecylbenzene sulfonate, 10-20 parts of fatty alcohol polyoxyethylene ether, and 10-20 parts of polyvinylpyrrolidone; the nitrogen fertilizer is urea; the phosphate fertilizer is superphosphate; and the potassium fertilizer is potassium nitrate; the thickener is composed of 20-30 parts of sepiolite powder, 40-50 parts of xanthan gum, and 10-20 parts of carboxymethyl cellulose.

2. The high calcium suspension fertilizer of claim 1, wherein, The penetrant, by weight, is composed of 40-50 parts fatty alcohol polyoxyethylene ether, 30-40 parts orange peel essential oil, and 5-10 parts ethoxylated modified polytrisiloxane.

3. The high-calcium suspension fertilizer according to claim 1, characterized in that, The antifreeze is ethylene glycol or glycerol.

4. A method for preparing the high-calcium suspension fertilizer according to claim 1, characterized in that, Includes the following steps: Step 1: The macro-element fertilizer, medium-element fertilizer and micro-element fertilizer are sequentially fed into an ultra-fine pulverizer for pulverization. Then, the pulverized macro-element fertilizer, medium-element fertilizer and micro-element fertilizer are fed into a mixing tank for mixing to obtain a mixed fertilizer, wherein the particle size D90 of the mixed fertilizer is <2μm. Step 2: Mix the mixed fertilizer with deionized water, adding auxiliary agents dropwise during the mixing process. The mixing speed is 500-800 r / min, and the mixing time is 20-40 min to obtain the activation solution. Step 3: Send the activated liquid to a high-speed shear emulsifier, pre-disperse it at 2000-3000 r / min for 10-20 min, and then shear and mix it at 8000-10000 r / min for 30-50 min to obtain a suspension fertilizer solution; Step four: The suspension fertilizer solution is filled and sealed to obtain high-calcium suspension fertilizer.

5. A method for applying the high-calcium suspension fertilizer according to claim 1, characterized in that, Includes the following steps: S1, 5-7 days before flowering: Mix high-calcium suspension fertilizer with water at a weight ratio of 1:300-1500, stir well and then spray on the leaves. S2, 10-12 days after flowering: Mix high-calcium suspension fertilizer with water at a weight ratio of 1:1500-2000, stir well and then spray on the leaves. S3, young fruit stage: Mix high-calcium suspension fertilizer with water at a weight ratio of 1:1000-1500, stir well and then spray on the leaves. Spraying time is 6:00-9:00 AM or 4:00-6:00 PM. Spray until the leaves are moist but not dripping. If it rains after spraying, re-spraying is required.

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