High-calcium suspension fertilizer as well as preparation method and application thereof

Abstract

The invention discloses a high-calcium suspension fertilizer as well as a preparation method and application thereof, and relates to the technical field of chemical fertilizer production, the high-calcium suspension fertilizer comprises the following components in parts by weight: 20-30 parts of a macroelement fertilizer, 10-15 parts of a medium element fertilizer, 3-5 parts of a microelement fertilizer, 0.5-3 parts of an auxiliary agent and 30-50 parts of deionized water; the macroelement fertilizer is prepared from 30-50 parts of nitrogen fertilizer, 20-30 parts of phosphate fertilizer and 15-20 parts of potash fertilizer; the medium element fertilizer is modified nano calcium carbonate and magnesium carbonate; the trace element fertilizer is prepared from zinc amino acid, sodium tetraborate, ferric sodium ethylenediaminetetraacetate, molybdenum sodium ethylenediaminetetraacetate, manganese sulfate monohydrate and copper sulfate pentahydrate. Therefore, the nano calcium carbonate can be quickly absorbed by the plants, so that calcium ions can be supplemented in time in the growth process of the plants, and the growth of the plants is accelerated.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of chemical fertilizer production, and particularly relates to a high-calcium suspending fertilizer and a preparation method and application thereof. BACKGROUND

[0002] The suspending fertilizer is a high-concentration liquid fertilizer, which forms a uniform and viscous system by stably suspending nano or micron nutrient element particles in liquid, and can provide high-concentration nutrients and meet the needs of modern water and fertilizer integration agriculture.

[0003] In order to quickly supplement calcium for crops, high-calcium fertilizer is often sprayed on plants to enable the plants to obtain calcium source supplement in a short time. However, the existing calcium source often selects calcium nitrate or calcium chloride. However, the calcium content of calcium nitrate is relatively low, and it is difficult to quickly supplement the calcium required by plants in a short time. Although calcium chloride has a high calcium content, it is difficult to use for crops (such as tobacco) that are afraid of chlorine. At the same time, the existing calcium source is difficult to be quickly absorbed by the leaf surface of plants, which makes it difficult for plants to quickly supplement calcium ions. SUMMARY

[0004] In view of the above defects, the purpose of the present application is to provide a high-calcium suspending fertilizer and a preparation method and application thereof, aiming to solve the problem that the existing calcium source in the suspending fertilizer in the prior art is difficult to be quickly absorbed by the leaf surface of plants.

[0005] To solve the above technical problems, the technical scheme of the present application is: A high-calcium suspending fertilizer, by weight, comprising 20-30 parts of macroelement fertilizer, 10-15 parts of medium element fertilizer, 3-5 parts of trace element fertilizer, 0.5-3 parts of auxiliary agent and 30-50 parts of deionized water; The macroelement fertilizer is composed 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 composed of 50-60 parts of modified nano calcium carbonate and 40-50 parts of magnesium carbonate; The trace element fertilizer is composed of zinc amino acid, sodium tetraborate, iron sodium ethylenediaminetetraacetate, molybdenum sodium ethylenediaminetetraacetate, manganese sulfate monohydrate and copper sulfate pentahydrate.

[0006] The nitrogen fertilizer is urea; the phosphorus fertilizer is calcium superphosphate, and the potassium fertilizer is potassium nitrate.

[0007] The trace element fertilizer is composed of 20-40 parts of zinc amino acid, 1-2 parts of molybdenum sodium ethylenediaminetetraacetate, 10-20 parts of sodium tetraborate, 10-20 parts of iron sodium ethylenediaminetetraacetate, 3-8 parts of manganese sulfate monohydrate and 20-40 parts of copper sulfate pentahydrate.

[0008] The auxiliary agent is composed of 10-15 parts of dispersing agent, 10-15 parts of penetrating agent, 5-8 parts of thickening agent, 20-30 parts of silicon quantum dots, 10-20 parts of chitosan, 25-30 parts of acetic acid, 3-5 parts of antifreezing agent and 30-40 parts of deionized water.

[0009] The dispersing agent is composed of 40-50 parts of methylnaphthalene sulfonate, 20-30 parts of sodium dodecyl benzene sulfonate, 10-20 parts of fatty alcohol polyoxyethylene ether and 10-20 parts of polyvinyl pyrrolidone.

[0010] The penetrating agent is composed of 40-50 parts of fatty alcohol polyoxyethylene ether, 30-40 parts of orange peel essential oil and 5-10 parts of ethoxylated polytrisiloxane.

[0011] The thickening agent is composed of 20-30 parts of sepiolite powder, 40-50 parts of xanthan gum and 10-20 parts of carboxymethyl cellulose.

[0012] The antifreezing agent is ethylene glycol or glycerol.

[0013] The application discloses a preparation method of high-calcium suspension fertilizer. Step one, macroelement fertilizer, medium element fertilizer and trace element fertilizer are sent to an ultrafine pulverizer in sequence for pulverization treatment, and then the pulverized macroelement fertilizer, medium element fertilizer and trace element fertilizer are sent to a stirring kettle for mixing to obtain mixed fertilizer, wherein the particle size D90 of the mixed fertilizer is less than 2 microns. Step two, the mixed fertilizer is stirred and mixed with deionized water, and an auxiliary agent is added dropwise in the stirring process, the stirring speed is 500-800 r / min, and the stirring time is 20-40 min, so as to prepare an activation liquid. Step three, the activation liquid is sent to a high-speed shearing emulsifier, is pre-dispersed at 2000-3000 r / min for 10-20 min, and then is sheared and mixed at 8000-10000 r / min for 30-50 min, so as to obtain a suspension fertilizer liquid. Step four, the suspension fertilizer liquid is filled and bagged to prepare the high-calcium suspension fertilizer.

[0014] The application discloses a method for applying high-calcium suspension fertilizer. S1, 5-7 days before flowering: the high-calcium suspension fertilizer is mixed with water at a weight ratio of 1:300-1500, is uniformly stirred and is sprayed on leaves; S2, 10-12 days after flowering: the high-calcium suspension fertilizer is mixed with water at a weight ratio of 1:1500-2000, is uniformly stirred and is sprayed on leaves; S3, young fruit period: the high-calcium suspension fertilizer is mixed with water at a weight ratio of 1:1000-1500, is uniformly stirred and is sprayed on leaves; The spraying time is 6:00-9:00 in the morning or 4:00-6:00 in the afternoon, and the spraying amount is to make the leaves wet but not drip. If it rains after spraying, it needs to be re-sprayed.

[0015] After adopting the technical scheme, the beneficial effects of the scheme are: First, nano calcium carbonate can be quickly absorbed by plants, which enables plants to supplement calcium ions in time during growth and accelerates plant growth. Second, under the action of the dispersing agent, various particles in the suspension fertilizer are uniformly dispersed, which avoids particle agglomeration in the suspension fertilizer. Third, under the joint action of the thickening agent and the superphosphate, calcium elements are slowly released, making the fertilizer more durable and effective. Fourth, with the assistance of silicon quantum dots, various nutrient elements can be quickly absorbed by leaves, and the photosynthesis efficiency is improved. DETAILED DESCRIPTION

[0016] A high-calcium suspension fertilizer, by weight, comprises 20-30 parts of macroelement fertilizer, 10-15 parts of medium element fertilizer, 3-5 parts of trace element fertilizer, 0.5-3 parts of auxiliary agent, and 30-50 parts of deionized water. The macroelement fertilizer is composed 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 composed of 50-60 parts of modified nano calcium carbonate and 40-50 parts of magnesium carbonate. The trace element fertilizer is composed of zinc amino acid, sodium tetraborate, iron sodium ethylenediaminetetraacetate, molybdenum sodium ethylenediaminetetraacetate, manganese sulfate monohydrate, and copper sulfate pentahydrate.

[0017] The nitrogen fertilizer is urea; the phosphorus fertilizer is superphosphate, and the potassium fertilizer is potassium nitrate.

[0018] The trace element fertilizer is composed of 20-40 parts of zinc amino acid, 1-2 parts of molybdenum sodium ethylenediaminetetraacetate, 10-20 parts of sodium tetraborate, 10-20 parts of iron sodium ethylenediaminetetraacetate, 3-8 parts of manganese sulfate monohydrate, and 20-40 parts of copper sulfate pentahydrate, by weight.

[0019] In this scheme, nano calcium carbonate is selected as the calcium source. Because it has high specific surface area, excellent dispersibility, high permeability, and fast solubility, it can be quickly absorbed and utilized by plants, and can supplement the required calcium ions for plants in a short time. The absorption speed of superphosphate by plants is much lower than that of nano calcium carbonate, so it can slowly and durably provide calcium source for plants. That is, nano calcium carbonate can quickly supplement calcium for plants, and superphosphate slowly and durably supplements calcium for plants. The two can effectively complement each other when used together.

[0020] The auxiliary agent is composed of 10-15 parts of dispersing agent, 10-15 parts of penetrating agent, 5-8 parts of thickening agent, 20-30 parts of silicon quantum dots, 10-20 parts of chitosan, 25-30 parts of acetic acid, 3-5 parts of antifreezing agent and 30-40 parts of deionized water.

[0021] When the silicon quantum dots are applied to the plant leaves, the photosynthesis of the plants can be improved through quantum effect, and the absorption and utilization efficiency of the plant leaves to the nutrients can be improved. Meanwhile, as a nano carrier, the silicon quantum dots can accelerate the speed of the nutrients entering the leaves and have the controlled release function.

[0022] The dispersing agent is composed of 40-50 parts of methylnaphthalene sulfonate, 20-30 parts of sodium dodecyl benzene sulfonate, 10-20 parts of fatty alcohol polyoxyethylene ether and 10-20 parts of polyvinyl pyrrolidone. The dispersing agent can maintain the uniform dispersion state of the fertilizer particles in the liquid, prevent the particle agglomeration and maintain the suspension stability.

[0023] The penetrating agent is composed of 40-50 parts of fatty alcohol polyoxyethylene ether, 30-40 parts of orange peel essential oil and 5-10 parts of ethoxylated polytrisiloxane. The penetrating agent can effectively improve the wettability, adhesion and penetration capacity of the fertilizer.

[0024] The orange peel essential oil is a natural penetrating agent extracted from the citrus peel, and the main component includes d-limonene (the content can be more than 90%). The orange peel essential oil not only has good permeability (the contact angle can be reduced to less than 30°), but also has biodegradability and environmental friendly characteristics.

[0025] The thickening agent is composed of 20-30 parts of sepiolite powder, 40-50 parts of xanthan gum and 10-20 parts of carboxymethyl cellulose. The thickening agent can improve the viscosity of the system, increase the adhesion and reduce the particle stratification or sedimentation phenomenon caused by gravity.

[0026] The antifreezing agent is ethylene glycol or glycerol.

[0027] A preparation method of high-calcium suspending fertilizer, comprising the following steps: Step one, the macroelement fertilizer, the medium element fertilizer and the trace element fertilizer are sent to the ultrafine grinder for crushing treatment in sequence, and then the crushed macroelement fertilizer, the medium element fertilizer and the trace element fertilizer are sent to the stirring kettle for mixing to obtain a mixed fertilizer, wherein the particle size D90 of the mixed fertilizer is less than 2 μm; Step two, the mixed fertilizer is stirred and mixed with deionized water, and the auxiliary agent is added dropwise during the stirring process, the stirring speed is 500-800 r / min, and the stirring time is 20-40 min, to obtain an activated liquid. Step three, the activated liquid is sent to a high-speed shearing emulsifier, pre-dispersed at 2000-3000 r / min for 10-20 min, and then sheared and mixed at 8000-10000 r / min for 30-50 min to obtain a suspension fertilizer liquid; Step four, the suspension fertilizer liquid is filled and sealed to obtain the high-calcium suspension fertilizer.

[0028] An application method of a high-calcium suspension fertilizer, comprising the following steps: S1, 5-7 days before flowering: the high-calcium suspension fertilizer is mixed with water at a weight ratio of 1:300-1500, and then sprayed on leaves after uniform stirring; S2, 10-12 days after flowering: the high-calcium suspension fertilizer is mixed with water at a weight ratio of 1:1500-2000, and then sprayed on leaves after uniform stirring; S3, young fruit period: the high-calcium suspension fertilizer is mixed with water at a weight ratio of 1:1000-1500, and then sprayed on leaves after uniform stirring; The spraying time is 6:00-9:00 in the morning or 4:00-6:00 in the afternoon, the spraying amount is until the leaves are wet but not dripping, and if it rains after spraying, it needs to be re-sprayed.

[0029] Example 1: The high-calcium suspension fertilizer is produced according to the above formula and steps, wherein, by weight, it is composed of 20 parts of macroelement fertilizer, 10 parts of medium element fertilizer, 3 parts of trace element fertilizer, 0.5 parts of auxiliary agent, and 30 parts of deionized water; The macroelement fertilizer is composed of 30 parts of nitrogen fertilizer, 20 parts of phosphorus fertilizer, and 15 parts of potassium fertilizer; The medium element fertilizer is composed of 50 parts of modified nano calcium carbonate and 40 parts of magnesium carbonate; The trace element fertilizer is composed of 20 parts of zinc amino acid, 1 part of sodium molybdate ethylenediamine tetraacetate, 10 parts of sodium tetraborate, 10 parts of iron sodium ethylenediamine tetraacetate, 3 parts of manganese sulfate monohydrate, and 20 parts of copper sulfate pentahydrate.

[0030] The auxiliary agent is composed of 10 parts of dispersing agent, 10 parts of penetrant, 5 parts of thickening agent, 20 parts of silicon quantum dots, 10 parts of chitosan, 25 parts of acetic acid, 3 parts of antifreeze, and 30 parts of deionized water.

[0031] The dispersing agent is composed of 40 parts of methylnaphthalene sulfonate, 20 parts of sodium dodecylbenzenesulfonate, 10 parts of fatty alcohol polyoxyethylene ether, and 10 parts of polyvinylpyrrolidone.

[0032] The penetrant is composed of 40 parts of fatty alcohol polyoxyethylene ether, 30 parts of orange peel essential oil, and 5 parts of ethoxylated polytrisiloxane.

[0033] The thickening agent is composed of 20 parts of sepiolite powder, 40 parts of xanthan gum and 10 parts of carboxymethyl cellulose.

[0034] The antifreezing agent is ethylene glycol.

[0035] In step two, the stirring speed is 500 r / min and the stirring time is 20 min, and the activation liquid is prepared. In step three, the activation liquid is sent to a high-speed shearing emulsifier, pre-dispersed at 2000 r / min for 10 min, and then sheared and mixed at 8000 r / min for 30 min to obtain the suspension fertilizer liquid.

[0036] Example 2 The difference between this example and example 1 is that: According to weight parts, it is composed of 24 parts of macroelement fertilizer, 12 parts of medium element fertilizer, 3.5 parts of trace element fertilizer, 1 part of auxiliary agent and 35 parts of deionized water. The macroelement fertilizer is composed of 35 parts of nitrogen fertilizer, 24 parts of phosphorus fertilizer and 14 parts of potassium fertilizer. The medium element fertilizer is composed of 54 parts of modified nano calcium carbonate and 44 parts of magnesium carbonate.

[0037] According to weight parts, the trace element fertilizer is composed of 25 parts of zinc amino acid, 1.4 parts of sodium molybdate ethylenediamine tetraacetate, 17.3 parts of sodium tetraborate, 17.3 parts of iron sodium ethylenediamine tetraacetate, 6 parts of manganese sulfate monohydrate and 25 parts of copper sulfate pentahydrate.

[0038] According to weight parts, the auxiliary agent is composed of 11 parts of dispersant, 11 parts of penetrant, 5.5 parts of thickening agent, 24 parts of silicon quantum dots, 14 parts of chitosan, 26 parts of acetic acid, 3.5 parts of antifreezing agent and 34 parts of deionized water.

[0039] According to weight parts, the dispersant is composed of 44 parts of methylnaphthalene sulfonate, 24 parts of sodium dodecyl benzene sulfonate, 14 parts of fatty alcohol polyoxyethylene ether and 14 parts of polyvinyl pyrrolidone.

[0040] According to weight parts, the penetrant is composed of 44 parts of fatty alcohol polyoxyethylene ether, 34 parts of orange peel essential oil and 6 parts of ethoxylated modified polysiloxane.

[0041] The thickening agent is composed of 24 parts of sepiolite powder, 44 parts of xanthan gum and 14 parts of carboxymethyl cellulose.

[0042] The antifreezing agent is glycerol.

[0043] In step two, the stirring speed is 600 r / min and the stirring time is 24 min, and the activation liquid is prepared. In step three, the activation liquid is sent to a high-speed shearing 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 liquid.

[0044] Example 3: The difference between this example and example 1 is that: According to weight parts, it is composed of 28 parts of macroelement fertilizer, 13 parts of medium element fertilizer, 4 parts of trace element fertilizer, 2 parts of auxiliary agent and 45 parts of deionized water; The macroelement fertilizer is composed of 45 parts of nitrogen fertilizer, 28 parts of phosphorus fertilizer and 18 parts of potassium fertilizer; The medium element fertilizer is composed of 58 parts of modified nano calcium carbonate and 48 parts of magnesium carbonate; According to weight parts, the trace element fertilizer is composed of 35 parts of zinc amino acid, 1.8 parts of sodium molybdate ethylenediamine tetraacetate, 18 parts of sodium tetraborate, 18 parts of iron sodium ethylenediamine tetraacetate, 5 parts of manganese sulfate monohydrate and 35 parts of copper sulfate pentahydrate.

[0045] According to weight parts, the auxiliary agent is composed of 13 parts of dispersing agent, 13 parts of penetrant, 6 parts of thickening agent, 28 parts of silicon quantum dot, 18 parts of chitosan, 28 parts of acetic acid, 4 parts of antifreeze and 38 parts of deionized water.

[0046] According to weight parts, the dispersing agent is composed of 48 parts of methylnaphthalene sulfonate, 28 parts of sodium dodecyl benzene sulfonate, 18 parts of fatty alcohol polyoxyethylene ether and 18 parts of polyvinylpyrrolidone.

[0047] According to weight parts, the penetrant is composed of 48 parts of fatty alcohol polyoxyethylene ether, 38 parts of orange peel essential oil and 8 parts of ethoxylated polytrisiloxane.

[0048] The thickening agent is composed of 28 parts of sepiolite powder, 48 parts of xanthan gum and 18 parts of carboxymethyl cellulose.

[0049] The antifreeze is glycerol.

[0050] In step two, the stirring speed is 700 r / min and the stirring time is 30 min to prepare the activation liquid; In step three, the activation liquid is sent to a high-speed shearing 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 liquid.

[0051] Example 4: The difference between this example and example 1 is that: According to weight parts, it is composed of 30 parts of macroelement fertilizer, 15 parts of medium element fertilizer, 5 parts of trace element fertilizer, 3 parts of auxiliary agent and 50 parts of deionized water; The macroelement fertilizer is composed of 50 parts of nitrogen fertilizer, 30 parts of phosphorus fertilizer and 20 parts of potassium fertilizer; The medium element fertilizer is composed of 60 parts of modified nano calcium carbonate and 50 parts of magnesium carbonate; The trace element fertilizer is composed of 40 parts of zinc amino acid, 2 parts of sodium molybdate ethylenediamine tetraacetate, 20 parts of sodium tetraborate, 20 parts of iron sodium ethylenediamine tetraacetate, 8 parts of manganese sulfate monohydrate and 40 parts of copper sulfate pentahydrate.

[0052] The auxiliary agent is composed of 15 parts of dispersant, 15 parts of penetrant, 8 parts of thickening agent, 30 parts of silicon quantum dot, 20 parts of chitosan, 30 parts of acetic acid, 5 parts of antifreeze and 40 parts of deionized water.

[0053] The dispersant is composed of 50 parts of methylnaphthalene sulfonate, 30 parts of sodium dodecyl benzene sulfonate, 20 parts of fatty alcohol polyoxyethylene ether and 20 parts of polyvinylpyrrolidone.

[0054] The penetrant is composed of 50 parts of fatty alcohol polyoxyethylene ether, 40 parts of orange peel essential oil and 10 parts of ethoxylated polysiloxane.

[0055] The thickening agent is composed of 30 parts of sepiolite powder, 50 parts of xanthan gum and 20 parts of carboxymethyl cellulose.

[0056] The antifreeze is ethylene glycol.

[0057] In step two, the stirring speed is 800 r / min and the stirring time is 40 min, and the activation liquid is prepared; In step three, the activation liquid is sent to a high-speed shearing emulsifier, pre-dispersed at 3000 r / min for 20 min, and then sheared and mixed at 10000 r / min for 50 min to obtain the suspension fertilizer liquid.

[0058] Comparative Example 1: The difference between this comparative example and Example 1 is that nano calcium carbonate is not used.

[0059] Comparative Example 2: The difference between this comparative example and Example 1 is that the phosphorus fertilizer is ammonium phosphate.

[0060] Comparative Example 3: The difference between this comparative example and Example 1 is that silicon quantum dots are not used.

[0061] Take pepper as the object, select the high calcium suspension fertilizer products in example 1-4, comparative example 1-3, and buy A, B, C three kinds of suspension fertilizers from the market, wherein the trade name of A is Topcal, the production enterprise is Italy Miragro International Co., Ltd., and the main components (g / L) are calcium (232g), boron (1.3g), and magnesium (1g).

[0062] The trade name of B is Baishi calcium, the production enterprise is Japan Global System Co., Ltd., the main raw material is calcium formate, and the registered technical index is Ca≥10%.

[0063] The trade name of C is Weiduoli, the production enterprise is Poland Adom Co., Ltd., and the main technical indexes 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%).

[0064] Take the pre-flowering period of pepper as an example, 5-7 days before the pepper flowers, the high calcium suspension fertilizer is mixed with water in a weight ratio of 1:300-1500, the mixture is stirred uniformly, and then the pepper leaves are sprayed, the spraying time is 6:00-9:00 in the morning, After spraying, the pepper leaves are sampled, and the calcium content (mg / 100g) is detected, and the results are shown in the following table:

[0065] As can be seen from the above table, because the combination of nano calcium carbonate and superphosphate is used in example 1-4, and the silicon quantum dots assist the nutrient absorption, the calcium content is highest on the 9.8th day, and then gradually decreases slowly on the 9.9th-9.14th day.

[0066] Comparative example 1 does not add nano calcium carbonate, even with the assistance of silicon quantum dots, the calcium content is still lower than that of example 1-4 on the 9.8th day, and although the calcium content in the leaves is still lower than that of example 1-4 on the 9.9th-9.14th day, the decrease speed is relatively slow, through analysis, it is known that this is because the calcium ions are slowly released under the joint action of thickening agent and superphosphate.

[0067] Comparative example 2 does not use superphosphate, so its content on the 9.8th day is close to that of example 1-4, but because the slow-release effect is poor, the calcium content in the leaves decreases rapidly.

[0068] Comparative example 3 does not use silicon quantum dots, so the initial calcium ion absorption speed is poor. By comparing the same date of example 1-4, it can be found that the calcium content in the leaves of comparative example 3 is lower than that of example 1-4 on the same date, but the calcium content does not appear cliff-like decline.

[0069] Compared with the three fertilizers A, B and C, the calcium ion content of embodiments 1-4 is higher, and the slow-release effect of embodiments 1-4 is better than that of the three suspending fertilizers A-C.

[0070] In summary, the present scheme has the following advantages: first, nano calcium carbonate can be quickly absorbed by plants, which enables plants to supplement calcium ions in time during the growth process and accelerates plant growth. Second, under the action of the dispersing agent, various particles in the suspending fertilizer are uniformly dispersed, which avoids the agglomeration of particles in the suspending fertilizer. Third, under the joint action of the thickening agent and the superphosphoric acid calcium, the calcium element is slowly released, making the fertility more persistent and effective. Fourth, with the assistance of silicon quantum dots, various nutrient elements can be quickly absorbed by leaves, and the photosynthesis efficiency is improved.

[0071] The present application is not limited to the above specific embodiments, and various modifications made by those skilled in the art without creative labor, based on the above concept, all fall within the scope of the present application.

Claims

1. A high calcium suspended fertilizer, characterized by, The auxiliary agent is composed of 10-15 parts of dispersing agent, 10-15 parts of penetrating agent, 5-8 parts of thickening agent, 20-30 parts of silicon quantum dots, 10-20 parts of chitosan, 25-30 parts of acetic acid, 3-5 parts of antifreezing agent and 30-40 parts of deionized water. The macronutrient fertilizer is composed of 30-50 parts of nitrogen fertilizer, 20-30 parts of phosphorus fertilizer and 15-20 parts of potassium fertilizer. The meso-element fertilizer is composed of 50-60 parts of modified nano calcium carbonate and 40-50 parts of magnesium carbonate. The micronutrient fertilizer is composed of zinc amino acid, sodium tetraborate, iron sodium ethylenediaminetetraacetate, molybdenum sodium ethylenediaminetetraacetate, manganese sulfate monohydrate and copper sulfate pentahydrate.

2. The high calcium suspension fertilizer of claim 1, wherein, The nitrogen fertilizer is urea, the phosphorus fertilizer is calcium superphosphate and the potassium fertilizer is potassium nitrate.

3. The high calcium suspension fertilizer of claim 1, wherein, The micronutrient fertilizer is composed of 20-40 parts of zinc amino acid, 1-2 parts of molybdenum sodium ethylenediaminetetraacetate, 10-20 parts of sodium tetraborate, 10-20 parts of iron sodium ethylenediaminetetraacetate, 3-8 parts of manganese sulfate monohydrate and 20-40 parts of copper sulfate pentahydrate.

4. The high calcium suspension fertilizer of claim 1, wherein, The auxiliary agent is composed of 10-15 parts of dispersing agent, 10-15 parts of penetrating agent, 5-8 parts of thickening agent, 20-30 parts of silicon quantum dots, 10-20 parts of chitosan, 25-30 parts of acetic acid, 3-5 parts of antifreezing agent and 30-40 parts of deionized water.

5. The high calcium suspension fertilizer of claim 4, wherein, The dispersing agent is composed of 40-50 parts of methylnaphthalene sulfonate, 20-30 parts of sodium dodecyl benzene sulfonate, 10-20 parts of fatty alcohol polyoxyethylene ether and 10-20 parts of polyvinylpyrrolidone.

6. The high calcium suspension fertilizer of claim 4, wherein, The penetrating agent is composed of 40-50 parts of fatty alcohol polyoxyethylene ether, 30-40 parts of orange peel essential oil and 5-10 parts of ethoxylated polysiloxane.

7. The high calcium suspension fertilizer of claim 4, wherein, The thickening agent is composed of 20-30 parts of sepiolite powder, 40-50 parts of xanthan gum and 10-20 parts of carboxymethyl cellulose.

8. The high calcium suspension fertilizer of claim 4, wherein, The antifreezing agent is ethylene glycol or glycerol.

9. A method of preparing the high calcium suspension fertilizer of claim 1, characterized in that, The method comprises the following steps: Step one, the macronutrient fertilizer, meso-element fertilizer and micronutrient fertilizer are sent to the ultrafine grinder in sequence for crushing treatment, and then the crushed macronutrient fertilizer, meso-element fertilizer and micronutrient fertilizer are mixed in the stirring kettle to obtain the mixed fertilizer, wherein the particle size D90 of the mixed fertilizer is less than 2 μm; Step two, the mixed fertilizer is stirred and mixed with deionized water, and the auxiliary agent is added dropwise during the stirring process, the stirring speed is 500-800 r / min, the stirring time is 20-40 min, and the activated liquid is prepared; Step three, the activated liquid is sent to the high-speed shearing emulsifier, pre-dispersed at 2000-3000 r / min for 10-20 min, and then sheared and mixed at 8000-10000 r / min for 30-50 min to obtain the suspension fertilizer liquid; Step four, the suspension fertilizer liquid is filled and bagged to prepare the high-calcium suspension fertilizer.

10. A method of applying the high calcium suspension fertilizer of claim 1, characterized by, The method comprises the following steps: S1, 5-7 days before flowering: the high-calcium suspension fertilizer is mixed with water at a weight ratio of 1:300-1500, stirred uniformly and then sprayed on the leaves; S2, 10-12 days after flowering: the high-calcium suspension fertilizer is mixed with water at a weight ratio of 1:1500-2000, stirred uniformly and then sprayed on the leaves; S3, young fruit stage: high calcium suspension fertilizer and water were mixed at a weight ratio of 1:1000-1500, stirred uniformly, and then sprayed on leaves; The spraying time was 6:00-9:00 in the morning or 4:00-6:00 in the afternoon, the spraying amount was to make the leaves wet but not dripping, and if it rained after spraying, it needed to be re-sprayed.

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