Dry suspending agent containing silicon fertilizer as well as preparation method and application of dry suspending agent

Abstract

The invention relates to the technical field of agricultural fertilizers, and particularly discloses a dry suspending agent containing a silicon fertilizer as well as a preparation method and application of the dry suspending agent. The dry suspending agent containing the silicon fertilizer specifically comprises the following components in parts by weight: 30-40 parts of silica powder, 0.5-1.5 parts of a dispersing agent, 8-12 parts of a stabilizer and 50-60 parts of a carrier, the stabilizer is formed by mixing palm oil polyhydric alcohol and marmot oil according to the weight ratio of (1-5): (1-5); the preparation method of the carrier comprises the following steps: mixing gamma-polyglutamic acid, calcium carbonate and a 5-15g / L gelatin aqueous solution according to a weight ratio of (1-5): (80-100): 1000, carrying out a reaction at 40-50 DEG C for 2-4 h, and carrying out vacuum drying, grinding and sieving. When the dry suspending agent disclosed by the invention is used for preparing the fertilizer, the utilization rate of the fertilizer and the yield and quality of crops can be effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of agricultural fertilizers, and in particular to a dry suspension containing silicon fertilizer and a preparation method and application thereof. Background Art

[0002] In the field of agricultural fertilizers, silicon fertilizers have been widely used because silicon is one of the beneficial elements necessary for plant growth. However, there are some problems with the application of traditional silicon fertilizers, such as difficulty in being absorbed and utilized by plants and easy loss of nutrients, which results in unsatisfactory application effects and poor crop yield and quality.

[0003] Therefore, how to improve the absorption and utilization rate of silicon fertilizer has become an urgent problem to be solved in the current agricultural field. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a dry suspension containing silicon fertilizer and a preparation method and application thereof.

[0005] In a first aspect, the present application provides a dry suspension containing silicon fertilizer, specifically comprising the following components in parts by weight: 30-40 parts of silicon micropowder, 0.5-1.5 parts of dispersant, 8-12 parts of stabilizer, and 50-60 parts of carrier;

[0006] The stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 1-5:1-5;

[0007] The preparation method of the carrier is as follows: gamma-polyglutamic acid, calcium carbonate and 5-15 g / L gelatin aqueous solution are mixed in a weight ratio of 1-5:80-100:1000, reacted at 40-50° C. for 2-4 hours, vacuum dried, ground and sieved to obtain the carrier.

[0008] The present application utilizes a mixture of palm oil polyol and marmot oil in a weight ratio of 1-5:1-5 to form a stabilizer, and selects a suitable carrier to prepare a dry suspension containing silicon fertilizer. The dry suspension is applied to the cultivation of crops, which can effectively improve the utilization rate of fertilizers and thus effectively improve the yield and quality of crops.

[0009] Dry suspension containing silicon fertilizer is an efficient plant nutrition supplement, but it is prone to stability problems during storage and use. In order to solve this problem, the present application proposes palm oil polyol and marmot oil in a specific weight ratio as stabilizers. The multiple hydroxyl (-OH) groups in the molecular structure of palm oil polyol with good chemical stability can form stable chemical bonds with other components in the fertilizer, thereby slowing down or preventing the occurrence of adverse chemical reactions and effectively resisting the erosion of various chemical reactions; in addition, palm oil polyol also has good compatibility and can be evenly mixed with other ingredients to further enhance the overall stability of the fertilizer. Marmot oil has natural moisturizing properties. Marmot oil is rich in natural moisturizing factors and can form a moisturizing film in the fertilizer dry suspension to prevent the loss and evaporation of nutrients. At the same time, its lubricity also helps to reduce the friction between particles, resist particle agglomeration, and improve the stability of the product. The combination of palm oil polyol and marmot oil in a specific ratio enables the fertilizer dry suspension to maintain better stability and effect during storage and use.

[0010] In the preparation method of the carrier, the γ-polyglutamic acid is porous, has a large specific surface area and pore volume, and can be embedded with calcium carbonate in a gelatin aqueous solution to form a network structure, which helps to improve the suspension and carrying capacity of silicon micropowder and other raw materials, and reduce the sedimentation and deposition of solid phase particles; and the carrier prepared by the method can be used as a slow-release carrier of fertilizer silicon micropowder by adjusting its ratio and processing technology, and the release rate of the fertilizer can be adjusted. This slow-release effect can slowly release the fertilizer in the soil, improve the utilization rate of the fertilizer, and reduce nutrient loss, thereby meeting the needs of sustained growth of plants; and the γ-polyglutamic acid Acid substances have a growth-promoting effect on plants, while calcium carbonate and gelatin help to improve soil structure and increase soil water and fertilizer retention capacity. As a carrier of silicon micropowder, it can promote plants' absorption and utilization of nutrients and increase the yield and quality of crops. In addition, when used in conjunction with fertilizers, it can improve the soil. The structure of the carrier can fill and cover the pores and cracks of the fertilizer to form a protective layer, reduce fertilizer loss, and promote the penetration of solid particles and small particles in the fertilizer into the stratum, thereby increasing the utilization rate of the fertilizer. It can also effectively promote the development of crop root systems, vigorous growth, and promote the efficient absorption of fertilizer nutrients by crops.

[0011] Preferably, the dry suspension containing silicon fertilizer specifically comprises the following components in parts by weight: 32-38 parts of monatomic silicon powder, 0.8-1.2 parts of dispersant, 9-11 parts of stabilizer, and 53-58 parts of carrier.

[0012] Preferably, the stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 1-2:3-5.

[0013] Preferably, the stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 1:3.

[0014] Preferably, the preparation method of the carrier is: mix γ-polyglutamic acid, calcium carbonate, and 8-12g / L gelatin aqueous solution in a weight ratio of 2-4:85-95:1000, react at 40-50°C for 2-4h, vacuum dry, grind and sieve to obtain the carrier.

[0015] Preferably, in the preparation method of the carrier, the process parameters of vacuum drying are: vacuum drying at 80-90° C. for 30-60 min, and then vacuum drying at 110-130° C. for 10-36 h.

[0016] Preferably, the silicon dioxide content in the silicon powder is 85-95% and the density is 1.8-2.2 g / cm 3 .

[0017] Preferably, the dispersant is selected from one or more of polycarboxylates, alkyl quaternary ammonium salts, deoxygenated sodium lignin sulfonate, sulfonate formaldehyde condensate, polyethylene glycol, sulfate ester salts, and polyaspartic acid.

[0018] In a second aspect, the present application provides a method for preparing the above-mentioned dry suspension containing silicon fertilizer, which specifically comprises the following steps in sequence:

[0019] Weigh each raw material according to weight, mix them evenly, and then mix them with water at a solid-liquid weight ratio of 4-7:10 to obtain a slurry;

[0020] The slurry is subjected to centrifugal spray drying and sieving to obtain the dry suspension containing the silicon fertilizer;

[0021] The specific process parameters of the centrifugal spray drying are: pressure of 1-3MPa, air inlet temperature of 140-160°C, and air outlet temperature of 80-95°C.

[0022] In a third aspect, the present application provides a fertilizer comprising the following components in parts by weight: 8-12 parts of urea, 2-4 parts of phosphorus pentoxide, 3.2-4.8 parts of potassium oxide, and 1.8-2.6 parts of the above-mentioned dry suspension containing silicon fertilizer.

[0023] In summary, the technical solution of this application has the following effects:

[0024] The present application utilizes a mixture of palm oil polyol and marmot oil in a weight ratio of 1-5:1-5 to form a stabilizer, and selects a suitable carrier to prepare a dry suspension containing silicon fertilizer. The dry suspension is applied to the cultivation of crops, which can effectively improve the utilization rate of fertilizers and thus effectively improve the yield and quality of crops. DETAILED DESCRIPTION

[0025] The present application is further described in detail below in conjunction with examples, comparative examples and performance testing experiments. These examples should not be construed as limiting the scope of protection claimed in the present application.

[0026] Palm oil polyol and soybean oil polyol were purchased from Shandong Skoray New Materials Technology Co., Ltd.; gelatin (X-Pure 10P HBLV) was purchased from Rousselot; calcium carbonate, hydroxyapatite, and γ-polyglutamic acid were purchased from Shanghai MacLean Biochemical Technology Co., Ltd.

[0027] Example

[0028] Examples 1-5

[0029] Examples 1-5 provide a dry suspension containing silicon fertilizer and a fertilizer, respectively.

[0030] The difference between the above embodiments is that the dosage of each raw material component in the dry suspension is different, as shown in Table 1.

[0031] The specific preparation process of the suspension in the above embodiment is as follows:

[0032] Preparation method of the carrier: 3 g of γ-polyglutamic acid, 90 g of calcium carbonate, and 1000 g of 10 g / L gelatin aqueous solution are mixed, reacted at 45°C for 3 h, vacuum dried at 85°C for 45 min, then vacuum dried at 120°C for 20 h, ground, and sieved through a 20-100 mesh sieve to obtain the carrier.

[0033] According to the formula requirements shown in Table 1, weigh the corresponding weight portions of silicon micropowder (silicon dioxide content of 85-95%, density of 2.0 g / cm 3 ), a dispersant, deoxygenated sodium lignin sulfonate, a stabilizer (composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 1:3), and a carrier, and the raw material components are uniformly mixed, and then mixed with water in a solid-liquid weight ratio of 1:2 to obtain a slurry;

[0034] The slurry is subjected to centrifugal spray drying, and the specific process conditions of spray drying are: pressure of 2MPa, air inlet temperature of 150°C, and air outlet temperature of 90°C; the spray-dried material is sieved through a 100-mesh screen to obtain a dry suspension containing silicon fertilizer.

[0035] The specific preparation process of the fertilizer in the above embodiment is as follows:

[0036] Weigh 10 kg of urea, 3 kg of phosphorus pentoxide, 4 kg of potassium oxide, and 2.4 kg of the dry suspension prepared above, respectively, and mix the raw materials to obtain a suspension.

[0037] Table 1 The amount of each raw material component in the dry suspension in Examples 1-5

[0038]

[0039] Embodiment 6-9

[0040] Examples 6-9 provide a dry suspension containing silicon fertilizer and a fertilizer, respectively.

[0041] The difference between the above embodiment and embodiment 3 is that the types of stabilizers in the suspending agent are different, as shown below.

[0042] In Example 6: the stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 3:1.

[0043] In Example 7: the stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 1:1.

[0044] In Example 8: the stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 1:5.

[0045] In Example 9: the stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 2:3.

[0046] The remaining process parameters in the above embodiment are the same as those in embodiment 3.

[0047] Examples 10-17

[0048] Examples 10-17 provide a dry suspension concentrate containing silicon fertilizer and a fertilizer, respectively.

[0049] The difference between the above embodiment and embodiment 3 is that the types of stabilizers in the suspending agent are different, as shown below.

[0050] In Example 10: The preparation method of the carrier is as follows: 1 g of γ-polyglutamic acid, 100 g of calcium carbonate, and 1000 g of a 15 g / L gelatin aqueous solution are mixed, reacted at 45° C. for 3 h, vacuum dried at 85° C. for 45 min, then vacuum dried at 120° C. for 20 h, ground, and sieved through a 100-mesh sieve to obtain.

[0051] In Example 11: The preparation method of the carrier is as follows: 5 g of γ-polyglutamic acid, 80 g of calcium carbonate, and 1000 g of 5 g / L gelatin aqueous solution are mixed, reacted at 45°C for 3 h, vacuum dried at 85°C for 45 min, then vacuum dried at 120°C for 20 h, ground, and sieved through a 100-mesh sieve to obtain.

[0052] In Example 12: The preparation method of the carrier is as follows: 2 g of γ-polyglutamic acid, 95 g of calcium carbonate, and 1000 g of 8 g / L gelatin aqueous solution are mixed, reacted at 45°C for 3 h, vacuum dried at 85°C for 45 min, then vacuum dried at 120°C for 20 h, ground, and sieved through a 100-mesh sieve to obtain.

[0053] In Example 13: The preparation method of the carrier is as follows: 4 g of γ-polyglutamic acid, 85 g of calcium carbonate, and 1000 g of 12 g / L gelatin aqueous solution are mixed, reacted at 45°C for 3 h, vacuum dried at 85°C for 45 min, then vacuum dried at 120°C for 20 h, ground, and sieved through a 100-mesh sieve to obtain.

[0054] In Example 14: The preparation method of the carrier is: 3 g of γ-polyglutamic acid, 90 g of calcium carbonate, and 1000 g of 10 g / L gelatin aqueous solution are mixed, reacted at 45°C for 3 h, vacuum dried at 85°C for 20 h, ground, and sieved through a 20-100 mesh sieve to obtain.

[0055] In Example 15: The preparation method of the carrier is as follows: 3 g of γ-polyglutamic acid, 90 g of calcium carbonate, and 1000 g of 10 g / L gelatin aqueous solution are mixed, reacted at 45°C for 3 h, vacuum dried at 120°C for 20 h, ground, and sieved through a 100-mesh sieve to obtain.

[0056] In Example 16: The preparation method of the carrier is as follows: 3 g of γ-polyglutamic acid, 90 g of calcium carbonate, and 1000 g of 10 g / L gelatin aqueous solution are mixed, reacted at 45°C for 3 h, vacuum dried at 80°C for 60 min, then vacuum dried at 110°C for 36 h, ground, and sieved through a 100-mesh sieve to obtain.

[0057] In Example 17: The preparation method of the carrier is as follows: 3 g of γ-polyglutamic acid, 90 g of calcium carbonate, and 1000 g of 10 g / L gelatin aqueous solution are mixed, reacted at 45°C for 3 h, vacuum dried at 90°C for 30 min, then vacuum dried at 130°C for 10 h, ground, and sieved through a 100-mesh sieve to obtain.

[0058] The remaining process parameters in the above embodiment are the same as those in embodiment 3.

[0059] Comparative Example

[0060] Comparative Example 1-2

[0061] Comparative Examples 1-2 provide a dry suspension containing silicon fertilizer and a fertilizer, respectively.

[0062] The difference between the comparative example and Example 3 is that the dosage of each raw material component in the dry suspension is different, as shown in Table 1.

[0063] The remaining process parameters in the above comparative example are the same as those in Example 3.

[0064] Comparative Examples 3-6

[0065] Comparative Examples 3-6 provide a dry suspension containing silicon fertilizer and a fertilizer, respectively.

[0066] The differences between the above comparative example and Example 3 are specifically as follows.

[0067] In Comparative Example 3: the stabilizer is composed of a mixture of palm oil polyol and horse oil in a weight ratio of 1:3.

[0068] In Comparative Example 4: the stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 1:9.

[0069] In Comparative Example 5: an equal amount of calcium carbonate was used as a carrier.

[0070] In Comparative Example 6: The preparation method of the carrier is as follows: 10 g of γ-polyglutamic acid, 60 g of calcium carbonate, and 1000 g of 1 g / L gelatin aqueous solution are mixed, reacted at 45°C for 3 h, vacuum dried at 85°C for 45 min, then vacuum dried at 120°C for 20 h, ground, and sieved through a 20-100 mesh sieve to obtain.

[0071] The remaining process parameters in the above comparative example are the same as those in Example 3.

[0072] Performance testing

[0073] Potted plant experiment: The fertilizer prepared in the embodiment and the comparative example was used to test the fertilizer efficiency on tomatoes. 5 g / m 2 , transplant the tomato seedlings with the same growth into the prepared soil for 3 months, and water and maintain them according to the normal planting conditions. Ten pots were planted in each treatment, with 3 plants in each pot, and 30 plants in each treatment.

[0074] At the same time, rapeseed was planted in pots with fertilizer without dry suspension agent (10 kg of urea, 3 kg of phosphorus pentoxide, and 4 kg of potassium oxide were weighed separately and mixed together) as a blank control.

[0075] After planting and harvesting, measure the height of tomato plants, collect tomato fruits, and record the tomato yield of each plant; determine the vitamin C content in tomato fruits by iodine titration; and test the quality of tomato plants (plant silicon content) in accordance with the industry standard LY / T 1270-1999.

[0076] Test results: as shown in Table 2.

[0077] Table 2 Performance test results of fertilizers in the embodiments and comparative examples

[0078]

[0079]

[0080] Combined with Table 2, by comparing the test results of the implementation and the comparative example, it can be seen that a dry suspension containing silicon fertilizer is obtained by using the memory scheme of the present application. The use of the dry suspension to prepare fertilizer can effectively improve the utilization rate of the fertilizer, thereby improving the yield and quality of crops.

[0081] By comparing the test results of Examples 1-5 with those of Comparative Examples 1-2, during the test, the applicant found that the dry suspension obtained by the dosage ratio of each raw material component has a great influence on the effect of the fertilizer. The present application effectively ensures the application effect of the dry suspension in the fertilizer by using specific weight portions of silicon micropowder, dispersant, stabilizer and carrier.

[0082] By comparing the test results of Examples 3, 6-9 with Comparative Examples 3-4, Comparative Example 3 uses palm oil polyol and horse oil mixed in a weight ratio of 1:3 to form a stabilizer, and Comparative Example 4 uses palm oil polyol and marmot oil mixed in a weight ratio of 1:9 to form a stabilizer. The application effect of the prepared dry suspension in fertilizer is poor; in contrast, the present application effectively improves the application effect of the dry suspension in fertilizer by selecting palm oil polyol and marmot oil mixed in a weight ratio of 1-5:1-5 to form a stabilizer.

[0083] By comparing the test results of Examples 3, 10-17 with Comparative Examples 5-6, Comparative Example 5 directly uses unmodified calcium carbonate as a carrier, and the amounts of γ-polyglutamic acid, calcium carbonate, and gelatin aqueous solution in the process of preparing the carrier in Comparative Example 6 are not matched, and the application effect of the prepared dry suspension in fertilizer is poor; in contrast, the present application prepares a dry suspension by mixing γ-polyglutamic acid, calcium carbonate, and 5-15 g / L gelatin aqueous solution in a weight ratio of 1-5:80-100:1000, reacting at 40-50°C for 2-4h, vacuum drying, grinding and sieving, thereby effectively improving the application effect of the dry suspension in fertilizer.

[0084] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A dry suspension containing silicon fertilizer, characterized in that: Specifically, it includes the following components in parts by weight: 30-40 parts of silicon micropowder, 0.5-1.5 parts of dispersant, 8-12 parts of stabilizer, and 50-60 parts of carrier; The stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 1-5:1-5; The preparation method of the carrier is as follows: gamma-polyglutamic acid, calcium carbonate and 5-15 g / L gelatin aqueous solution are mixed in a weight ratio of 1-5:80-100:1000, reacted at 40-50° C. for 2-4 hours, vacuum dried, ground and sieved to obtain the carrier.

2. The dry suspension containing silicon fertilizer according to claim 1, characterized in that: Specifically, the composition includes the following components in parts by weight: 32-38 parts of monatomic silicon powder, 0.8-1.2 parts of dispersant, 9-11 parts of stabilizer and 53-58 parts of carrier.

3. The dry suspension containing silicon fertilizer according to claim 1, characterized in that: The stabilizer is composed of palm oil polyol and marmot oil mixed in a weight ratio of 1-2:3-5.

4. The dry suspension containing silicon fertilizer according to claim 3, characterized in that: The stabilizer is composed of a mixture of palm oil polyol and marmot oil in a weight ratio of 1:

3.

5. The dry suspension containing silicon fertilizer according to claim 1, characterized in that: The preparation method of the carrier is as follows: γ-polyglutamic acid, calcium carbonate and 8-12 g / L gelatin aqueous solution are mixed in a weight ratio of 2-4:85-95:1000, reacted at 40-50° C. for 2-4 hours, vacuum dried, ground and sieved to obtain the carrier.

6. The dry suspension containing silicon fertilizer according to claim 1, characterized in that: In the preparation method of the carrier, the process parameters of vacuum drying are: vacuum drying at 80-90° C. for 30-60 min, and then vacuum drying at 110-130° C. for 10-36 h.

7. The dry suspension containing silicon fertilizer according to claim 1, characterized in that: The silicon dioxide content in the silicon micropowder is 85-95%, and the density is 1.8-2.2g / cm 3 .

8. The dry suspension containing silicon fertilizer according to claim 1, characterized in that: The dispersant is selected from one or more of polycarboxylates, alkyl quaternary ammonium salts, deoxidized sodium lignin sulfonate, sulfonate formaldehyde condensate, polyethylene glycol, sulfate ester salts, and polyaspartic acid.

9. The method for preparing a dry suspension containing silicon fertilizer according to any one of claims 1 to 8, characterized in that: Specifically, the following steps are performed in sequence: Weigh each raw material according to weight, mix them evenly, and then mix them with water at a solid-liquid weight ratio of 4-7:10 to obtain a slurry; The slurry is subjected to centrifugal spray drying and sieving to obtain the dry suspension containing the silicon fertilizer; The specific process parameters of the centrifugal spray drying are: pressure of 1-3MPa, air inlet temperature of 140-160°C, and air outlet temperature of 80-95°C.

10. A fertilizer, characterized in that: The fertilizer comprises the following components in parts by weight: 8-12 parts of urea, 2-4 parts of phosphorus pentoxide, 3.2-4.8 parts of potassium oxide, and 1.8-2.6 parts of the dry suspension containing silicon fertilizer according to any one of claims 1-8.

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