Phosphorus activation preparation, preparation method thereof and application of phosphorus activation preparation in fertilizer
By intercalating modified humic acid-citric acid complex onto hydrotalcite and combining it with other components, the problem of low phosphorus fixation and utilization rate was solved, the content of available phosphorus in the soil and the utilization rate of phosphate fertilizer were increased, and sustainable agricultural development was promoted.
Patent Information
- Application Number
- CN202511623579.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-01-16
AI Technical Summary
Phosphorus is easily fixed in soil and has low utilization rate, resulting in high agricultural production costs and environmental harm. Phosphate rock is non-renewable, which affects the sustainable development of agriculture.
By intercalating negatively charged modified humic acid-citric acid complex powder onto hydrotalcite to form a stable hybrid structure, combined with gelatinous Bacillus subtilis, seaweed extract, polycaprolactone, and hydrophobic nano-silica, the available phosphorus content in the soil is increased.
It significantly improves the utilization rate of phosphate fertilizer, reduces phosphorus fixation and loss, promotes the absorption and transport of phosphorus by crops, improves fluidity and uniformity, and ensures the colonization and working efficiency of microorganisms.
Smart Images
Figure SMS_1
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the technical field of fertilizers, and relates to a phosphorus activation preparation, a preparation method thereof and application of the preparation in fertilizers. BACKGROUND
[0002] Phosphorus is one of the essential macroelements for crops, and the content thereof plays an important role in regulating the yield of rice. However, phosphorus in soil is easily fixed, and the utilization rate of phosphorus applied to soil is extremely low. In order to meet the demand of crops and achieve the expected utilization rate of phosphorus, farmers have to continuously and massively input phosphorus fertilizer, which significantly increases the cost of agricultural production. In addition, the accumulated fixed phosphorus in soil may enter water bodies with runoff under the action of rainfall or irrigation, causing water eutrophication, algae outbreak, water quality deterioration and a series of ecological disasters. Finally, the phosphorus ore relied on for the production of phosphorus fertilizer is a non-renewable strategic resource, and the inefficient utilization of the resource accelerates the exhaustion of the resource, which threatens the long-term sustainable development of agriculture. SUMMARY
[0003] The application aims to provide a phosphorus activation preparation, a preparation method thereof and application of the preparation in fertilizers. The application provides a phosphorus activation preparation. The negatively charged modified humic acid-citric acid compound powder is intercalated on hydrotalcite by electrostatic interaction to form a stable hybrid structure, which significantly increases the specific surface area and reactive sites of the material, and cooperates with the jelly-like bacillus, seaweed extract, polycaprolactone and hydrophobic nano-silicon dioxide to improve the content of soil available phosphorus and the utilization rate of phosphorus fertilizer.
[0004] The purpose of the application can be achieved by the following technical solutions. A preparation method of a phosphorus activation preparation, the preparation method of the phosphorus activation preparation comprising the following steps: S11, hydrotalcite is added to deionized water, and ultrasonic treatment is performed to obtain a suspension; S12, after setting an initial rotating speed, modified humic acid-citric acid compound powder is added to the suspension, and the rotating speed is increased for stirring after the addition is completed to obtain a mixed solution; S13, the mixed solution is controlled in temperature and stirred, and spray drying is performed to obtain a compound powder; S14, the compound powder, jelly-like bacillus, seaweed extract, polycaprolactone and hydrophobic nano-silicon dioxide are mixed and stirred, and the material is discharged to obtain a phosphorus activation preparation.
[0005] Further, the mass ratio of the hydrotalcite to the deionized water in step S11 is 1:15-20. The ultrasonic treatment refers to setting an ultrasonic frequency of 30-50 kHz and an ultrasonic power of 550-650 W, and performing ultrasonic treatment for 25-35 min.
[0006] Further, the mass ratio of the modified humic acid-citric acid composite powder and the suspension in step S12 is 1:4.2-6.8; the initial rotating speed is 7500-8500 rpm; the lifting rotating speed stirring refers to lifting the rotating speed to 9000-11000 rpm and stirring for 1.2-1.8 h.
[0007] Further, the preparation method of the modified humic acid-citric acid composite powder in step S12 comprises the following steps: S21, uniformly mixing humic acid powder and citric acid powder to obtain mixed dry materials; S22, activating the mixed dry materials by using hydrogen peroxide solution, and then spray drying to obtain modified humic acid-citric acid composite powder.
[0008] Further, the mass ratio of the humic acid powder and the citric acid powder in step S21 is 1:0.3-0.4; the mass ratio of the mixed dry materials and the hydrogen peroxide solution in step S22 is 1:5.5-7.5; the mass concentration of hydrogen peroxide in the hydrogen peroxide solution is 0.6-1 wt%; and the activation refers to stirring at 200-300 rpm and 60-70℃ for 4-6 h.
[0009] Further, the temperature-controlled stirring in step S13 refers to stirring at 60-70℃ for 7-9 h.
[0010] Further, the mass ratio of the composite powder, the Paenibacillus mucilaginosus, the seaweed extract, the polycaprolactone and the hydrophobic nano-silicon dioxide in step S14 is 12.5-13.5:2.5-3.5:2.5-3.5:0.75-0.85:0.15-0.25; and the mixing stirring refers to stirring at 10-20 rpm for 30-60 min.
[0011] Further, the phosphorus-activated preparation is prepared by the above preparation method.
[0012] Further, the phosphorus-activated preparation is applied to chemical fertilizers.
[0013] Further, the addition amount of the phosphorus-activated preparation in the chemical fertilizer is 0.5-1 wt% of the mass of the chemical fertilizer.
[0014] The beneficial effects of the present application are: (1) The present application provides a kind of phosphorus activation preparation, wherein the composite powder forms positive metal hydroxide lamella and interlayer exchangeable anion in preparation process, the anion between lamella can be replaced by other anion through ion exchange, form stable hybrid structure, and then significantly increase the specific surface area and reactive site of material, synergistic jelly-like bacillus, seaweed extract, polycaprolactone, hydrophobic nanosilica, improve the content of soil available phosphorus, and then improve the utilization rate of phosphorus fertilizer.
[0015] (2) The present application provides a kind of phosphorus activation preparation, wherein the hydrotalcite has unique anion exchange characteristics, can effectively capture and fix phosphate ions, adsorb and save the free phosphorus in soil, greatly reduce the fixation and loss of phosphorus;In addition, the modified humic acid-citric acid complex is rich in a large number of high-activity carboxyl and phenolic hydroxyl groups, and its chelating capacity is much higher than that of unmodified raw materials, which can strongly complex calcium ions, iron ions and aluminum ions in soil, help to dissolve insoluble phosphates, release available phosphorus and increase the content of soil available phosphorus.
[0016] (3) The present application provides a kind of phosphorus activation preparation, also includes jelly-like bacillus, seaweed extract, polycaprolactone, hydrophobic nanosilica. Among them, jelly-like bacillus as functional microorganism, the organic acid and phosphatase secreted by it can carry out biological phosphorus solubilization and form long-acting phosphorus solubilization microenvironment in rhizosphere;And polycaprolactone as a slow-release carbon source, it cannot be directly absorbed by crops, but can provide exclusive and persistent "food" source for functional microorganisms (jelly-like bacillus), ensure its survival and reproduction ability, avoid the problem of nitrogen competition between microorganisms and crops caused by rapid decomposition of ordinary sugar carbon source, significantly improve the colonization success rate and working efficiency of microbial agent in soil;Seaweed extract is rich in natural plant growth regulators and seaweed polysaccharides, which can strongly stimulate crop root development, increase absorption surface area and improve the active absorption and transport capacity of crops to phosphorus;Hydrophobic nanosilica greatly improves the flowability of powder preparation, prevents moisture absorption and caking, ensures the uniformity and effectiveness of product action. DETAILED DESCRIPTION
[0017] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object, the specific embodiments, structures, features and effects according to the present application are described in detail as follows.
[0018] The hydrotalcite, citric acid powder in all the examples and comparative examples of the present application are purchased from Jinan Huijinchuan Business and Trade Co., Ltd.; the humic acid powder is purchased from Yingxian Hongjie Fertilizer Co., Ltd.; the jelly-like Paenibacillus is purchased from Wuhan Smack Biological Technology Co., Ltd.; the seaweed extract is purchased from Xisai'ao Biological Technology Co., Ltd.; the polycaprolactone is purchased from Dongguan Baojia Plastic Co., Ltd.; the hydrophobic nano-silicon dioxide is purchased from Jining Fangyi Chemical Co., Ltd.
[0019] Example 1 A preparation method of a phosphorus-activated preparation, comprising the following steps: S11, adding hydrotalcite into deionized water, and performing ultrasonic treatment to obtain a suspension; S12, after setting an initial rotating speed, adding modified humic acid-citric acid compound powder into the suspension, and after the addition is completed, increasing the rotating speed for stirring to obtain a mixed solution; S13, controlling temperature and stirring the mixed solution, and performing spray drying to obtain compound powder; S14, mixing and stirring the compound powder, jelly-like Paenibacillus, seaweed extract, polycaprolactone and hydrophobic nano-silicon dioxide, and discharging to obtain a phosphorus-activated preparation.
[0020] The mass ratio of the hydrotalcite to the deionized water in step S11 is 1:15; the ultrasonic treatment refers to setting an ultrasonic frequency of 30 kHz and an ultrasonic power of 550 W, and performing ultrasonic treatment for 25 min.
[0021] The mass ratio of the modified humic acid-citric acid compound powder to the suspension in step S12 is 1:4.2; the initial rotating speed is 7500 rpm; the increasing rotating speed for stirring refers to increasing the rotating speed to 9000 rpm for stirring for 1.2 h.
[0022] The preparation method of the modified humic acid-citric acid compound powder in step S12 comprises the following steps: S21, uniformly mixing humic acid powder and citric acid powder to obtain mixed dry materials; S22, activating the mixed dry materials by using hydrogen peroxide solution, and then performing spray drying to obtain modified humic acid-citric acid compound powder.
[0023] The mass ratio of the humic acid powder to the citric acid powder in step S21 is 1:0.3; the mass ratio of the mixed dry materials to the hydrogen peroxide solution in step S22 is 1:5.5; the mass concentration of hydrogen peroxide in the hydrogen peroxide solution is 0.6 wt%; the activation refers to stirring at 60 ℃ and a rotating speed of 200 rpm for 4 h.
[0024] The temperature-controlled stirring in step S13 refers to stirring at 60 ℃ for 7 h.
[0025] The mass ratio of the complex powder, Paenibacillus mucilaginosus, seaweed extract, polycaprolactone, and hydrophobic nanosilica in step S14 is 12.5:2.5:2.5:0.75:0.15; the mixing and stirring refers to stirring at a speed of 10 rpm for 30 min.
[0026] The phosphorus-activated preparation is prepared by the preparation method.
[0027] The phosphorus-activated preparation is applied to chemical fertilizers.
[0028] The addition amount of the phosphorus-activated preparation in the chemical fertilizer is 0.5 wt% of the mass of the chemical fertilizer.
[0029] Embodiment 2 A preparation method of a phosphorus-activated preparation, the preparation method of the phosphorus-activated preparation comprising the following steps: S11, adding hydrotalcite into deionized water and performing ultrasonic treatment to obtain a suspension; S12, after setting an initial rotating speed, adding modified humic acid-citric acid complex powder into the suspension, and after completing the feeding, increasing the rotating speed for stirring to obtain a mixed solution; S13, controlling the temperature and stirring the mixed solution, and performing spray drying to obtain the complex powder; S14, mixing and stirring the complex powder, Paenibacillus mucilaginosus, seaweed extract, polycaprolactone, and hydrophobic nanosilica, and discharging to obtain the phosphorus-activated preparation.
[0030] The mass ratio of the hydrotalcite and the deionized water in step S11 is 1:16.5; the ultrasonic treatment refers to setting an ultrasonic frequency of 35 kHz and an ultrasonic power of 550 W, and performing ultrasonic treatment for 25 min.
[0031] The mass ratio of the modified humic acid-citric acid complex powder and the suspension in step S12 is 1:4.8; the initial rotating speed is 7500 rpm; the increasing rotating speed stirring refers to increasing the rotating speed to 9000 rpm for stirring for 1.4 h.
[0032] The preparation method of the modified humic acid-citric acid complex powder in step S12 comprises the following steps: S21, uniformly mixing humic acid powder and citric acid powder to obtain mixed dry materials; S22, activating the mixed dry materials by using hydrogen peroxide solution, and then performing spray drying to obtain the modified humic acid-citric acid complex powder.
[0033] The mass ratio of the humic acid powder and the citric acid powder in step S21 is 1:0.32; the mass ratio of the mixed dry material and the hydrogen peroxide solution in step S22 is 1:6.1; the mass concentration of hydrogen peroxide in the hydrogen peroxide solution is 0.7wt%; the activation refers to stirring at 60℃ for 4.5h at a rotation speed of 200rpm.
[0034] The temperature-controlled stirring in step S13 refers to stirring at 60℃ for 7.5h.
[0035] The mass ratio of the complex powder, the Paenibacillus mucilaginosus, the seaweed extract, the polycaprolactone and the hydrophobic nanosilica in step S14 is 12.8:2.7:2.7:0.79:0.18; the mixed stirring refers to stirring for 35min at a rotation speed of 10rpm.
[0036] The phosphorus-activated preparation is prepared by the preparation method.
[0037] The phosphorus-activated preparation is applied to chemical fertilizer.
[0038] The addition amount of the phosphorus-activated preparation in the chemical fertilizer is 0.65wt% of the mass of the chemical fertilizer.
[0039] Embodiment 3 A preparation method of a phosphorus-activated preparation, the preparation method of the phosphorus-activated preparation comprising the following steps: S11, adding hydrotalcite into deionized water and performing ultrasonic treatment to obtain a suspension; S12, setting an initial rotation speed, adding modified humic acid-citric acid complex powder into the suspension, and increasing the rotation speed after the addition is completed to stir to obtain a mixed solution; S13, temperature-controlled stirring the mixed solution and spray drying to obtain complex powder; S14, mixing and stirring the complex powder, Paenibacillus mucilaginosus, seaweed extract, polycaprolactone and hydrophobic nanosilica, and discharging to obtain the phosphorus-activated preparation.
[0040] The mass ratio of the hydrotalcite and the deionized water in step S11 is 1:17.5; the ultrasonic treatment refers to setting an ultrasonic frequency of 40kHz and an ultrasonic power of 600W and ultrasonic treatment for 30min.
[0041] The mass ratio of the modified humic acid-citric acid complex powder and the suspension in step S12 is 1:5.5; the initial rotation speed is 8000rpm; the increased rotation speed stirring refers to increasing the rotation speed to 10000rpm and stirring for 1.5h.
[0042] The preparation method of the modified humic acid-citric acid complex powder in step S12 comprises the following steps: S21, uniformly mixing humic acid powder and citric acid powder to obtain mixed dry materials; S22, activating the mixed dry materials by hydrogen peroxide solution, and then spray drying to obtain modified humic acid-citric acid compound powder.
[0043] The mass ratio of the humic acid powder and the citric acid powder in step S21 is 1:0.35; the mass ratio of the mixed dry materials and the hydrogen peroxide solution in step S22 is 1:6.5; the mass concentration of hydrogen peroxide in the hydrogen peroxide solution is 0.8 wt%; and the activation refers to stirring at 65 DEG C and a rotation speed of 250 rpm for 5 h.
[0044] The temperature-controlled stirring in step S13 refers to stirring at 65 DEG C for 8 h.
[0045] The mass ratio of the compound powder, Paenibacillus mucilaginosus, seaweed extract, polycaprolactone and hydrophobic nano-silicon dioxide in step S14 is 13:3:3:0.8:0.2; and the mixing and stirring refers to stirring at a rotation speed of 15 rpm for 45 min.
[0046] The phosphorus-activated preparation prepared by the above preparation method.
[0047] The phosphorus-activated preparation is applied to chemical fertilizers.
[0048] The addition amount of the phosphorus-activated preparation in the chemical fertilizer is 0.75 wt% of the mass of the chemical fertilizer.
[0049] Example 4 A preparation method of a phosphorus-activated preparation, the preparation method of the phosphorus-activated preparation comprising the following steps: S11, adding hydrotalcite into deionized water and performing ultrasonic treatment to obtain a suspension; S12, setting an initial rotation speed, adding modified humic acid-citric acid compound powder into the suspension, and then increasing the rotation speed to stir after the addition is completed to obtain a mixed solution; S13, temperature-controlling and stirring the mixed solution, and then spray drying to obtain compound powder; S14, mixing and stirring the compound powder, Paenibacillus mucilaginosus, seaweed extract, polycaprolactone and hydrophobic nano-silicon dioxide, and then discharging to obtain a phosphorus-activated preparation.
[0050] The mass ratio of the hydrotalcite and the deionized water in step S11 is 1:18.5; and the ultrasonic treatment refers to setting an ultrasonic frequency of 45 kHz and an ultrasonic power of 650 W, and then ultrasonic treating for 35 min.
[0051] The mass ratio of the modified humic acid-citric acid composite powder to the suspension in step S12 is 1:6; the initial rotation speed is 8500 rpm; the increased rotation speed refers to increasing the rotation speed to 11000 rpm and stirring for 1.6 hours.
[0052] The preparation method of the modified humic acid-citric acid complex powder in step S12 includes the following steps: S21. Mix the humic acid powder and citric acid powder evenly to obtain a mixed dry material; S22. The mixed dry materials are activated with hydrogen peroxide solution and then spray-dried to obtain modified humic acid-citric acid composite powder.
[0053] The mass ratio of humic acid powder to citric acid powder in step S21 is 1:0.37; the mass ratio of the mixed dry material to hydrogen peroxide solution in step S22 is 1:6.8; the mass concentration of hydrogen peroxide in the hydrogen peroxide solution is 0.9wt%; the activation refers to stirring at 300rpm for 5.5h at 70℃.
[0054] The temperature-controlled stirring mentioned in step S13 refers to stirring at 70°C for 8.5 hours.
[0055] The mass ratio of the complex powder, gelatinous Bacillus, seaweed extract, polycaprolactone, and hydrophobic nano-silica in step S14 is 13.3:3.2:3.2:0.81:0.23; the mixing and stirring refers to stirring at 20 rpm for 55 min.
[0056] The phosphorus-activated preparation obtained by the above preparation method.
[0057] The phosphorus activating agent is used in chemical fertilizers.
[0058] The phosphorus activating agent is added to the fertilizer at a rate of 0.85 wt% of the fertilizer mass.
[0059] Example 5 A method for preparing a phosphorus-activated agent, the method comprising the following steps: S11. Add hydrotalcite to deionized water and sonicate to obtain a suspension; S12. After setting the initial speed, add modified humic acid-citric acid complex powder to the suspension. After the addition is complete, increase the speed and stir to obtain a mixture. S13. Stir the mixture under controlled temperature, then spray dry to obtain the composite powder; S14. Mix and stir the complex powder, gelatinous Bacillus subtilis, seaweed extract, polycaprolactone, and hydrophobic nano-silica, and discharge the mixture to obtain the phosphorus-activated preparation.
[0060] The mass ratio of hydrotalcite to deionized water in step S11 is 1:20; the ultrasonic treatment refers to setting the ultrasonic frequency to 50kHz, the ultrasonic power to 650W, and the ultrasonic treatment time to 35min.
[0061] The mass ratio of the modified humic acid-citric acid composite powder to the suspension in step S12 is 1:6.8; the initial rotation speed is 8500 rpm; the increased rotation speed refers to increasing the rotation speed to 11000 rpm and stirring for 1.8 hours.
[0062] The preparation method of the modified humic acid-citric acid complex powder in step S12 includes the following steps: S21. Mix the humic acid powder and citric acid powder evenly to obtain a mixed dry material; S22. The mixed dry materials are activated with hydrogen peroxide solution and then spray-dried to obtain modified humic acid-citric acid composite powder.
[0063] The mass ratio of humic acid powder to citric acid powder in step S21 is 1:0.4; the mass ratio of the mixed dry material to hydrogen peroxide solution in step S22 is 1:7.5; the mass concentration of hydrogen peroxide in the hydrogen peroxide solution is 1 wt%; the activation refers to stirring at 300 rpm for 6 hours at 70°C.
[0064] The temperature-controlled stirring mentioned in step S13 refers to stirring at 70°C for 9 hours.
[0065] The mass ratio of the complex powder, gelatinous Bacillus, seaweed extract, polycaprolactone, and hydrophobic nano-silica in step S14 is 13.5:3.5:3.5:0.85:0.25; the mixing and stirring refers to stirring at 20 rpm for 60 min.
[0066] The phosphorus-activated preparation obtained by the above preparation method.
[0067] The phosphorus activating agent is used in chemical fertilizers.
[0068] The phosphorus activating agent is added to the fertilizer at a rate of 1 wt% of the fertilizer mass.
[0069] Example 6 Based on Example 3, the gelatinous Bacillus in step S14 was removed and replaced with an equal weight of seaweed extract, while other conditions remained the same as in Example 3.
[0070] Example 7 Based on Example 3, the seaweed extract in step S14 was removed and replaced with an equal weight of polycaprolactone, while other conditions remained the same as in Example 3.
[0071] Example 8 Based on Example 3, the polycaprolactone in step S14 was removed and replaced with an equal weight of hydrophobic nano-silica, while other conditions remained the same as in Example 3.
[0072] Example 9 Based on Example 3, the mass ratio of the complex powder, gelatinous Bacillus, seaweed extract, polycaprolactone, and hydrophobic nano-silica was changed to 14:2:2:1.3:0.7.
[0073] Comparative Example 1 Based on Example 3, the modified humic acid-citric acid complex powder was changed to humic acid-citric acid complex powder, which was obtained by mixing humic acid powder and citric acid powder at a mass ratio of 1:0.35, while other conditions remained the same as in Example 3.
[0074] Comparative Example 2 Based on Example 3, while keeping other conditions consistent, the modified humic acid-citric acid composite powder was replaced with modified humic acid powder. The preparation method of the modified humic acid powder is as follows: Humic acid powder and 0.8wt% hydrogen peroxide solution were mixed at a mass ratio of 1:6.5, stirred at 250rpm for 5 hours at 65℃, and then spray-dried to obtain modified humic acid powder.
[0075] Comparative Example 3 Based on Example 3, while keeping other conditions consistent, the preparation method of the phosphorus-activated agent was changed to include the following steps: S11. Add hydrotalcite to deionized water and sonicate to obtain a suspension; S12. After setting the initial speed, add modified humic acid-citric acid complex powder to the suspension. After the addition is complete, increase the speed and stir. Spray dry to obtain complex powder. S13. Mix and stir the complex powder, gelatinous Bacillus subtilis, seaweed extract, polycaprolactone, and hydrophobic nano-silica, and discharge the mixture to obtain the phosphorus-activated preparation.
[0076] Comparative Example 4 Based on Example 3, while keeping other conditions consistent, the preparation method of the phosphorus-activated agent was changed to include the following steps: The hydrotalcite, modified humic acid-citric acid complex powder, complex powder, gelatinous Bacillus subtilis, seaweed extract, polycaprolactone, and hydrophobic nano-silica were mixed and stirred, and then discharged to obtain a phosphorus-activated preparation.
[0077] Using the phosphorus-activating agents prepared in Examples 1-9 and Comparative Examples 1-4 as samples, 0.4g of the sample, 3g of N, 2g of P2O5, and 0.8g of K were mixed and applied as base fertilizer to planting barrels containing 10kg of air-dried sandy loam soil, serving as the experimental group; at the same time, 3g of N, 2g of P2O5, and 0.8g of K were mixed and applied as base fertilizer to planting barrels containing 10kg of air-dried sandy loam soil, serving as the control group; all planting barrels were filled with water to a depth of 2cm, and Huai Rice No. 5 was planted. After 30 days of cultivation in a greenhouse, the increase rate of available phosphorus content in the experimental group planting barrels relative to the available phosphorus content in the control group planting barrels was recorded as shown in Table 1 below.
[0078] As shown in Table 1, the phosphorus activating agent prepared by the present invention can effectively increase the content of available phosphorus in the soil and improve the utilization rate of phosphate fertilizer, and has good application prospects.
[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A method of preparing a phosphorus-activated formulation, characterized by: The preparation method of the phosphorus activated preparation comprises the following steps: S11, adding the hydrotalcite into the deionized water and performing ultrasonic treatment to obtain a suspension; S12, after setting an initial rotating speed, adding the modified humic acid-citric acid compound powder into the suspension, and after the addition is completed, increasing the rotating speed for stirring to obtain a mixed solution; S13, controlling temperature and stirring the mixed solution, and performing spray drying to obtain the compound powder; S14, mixing and stirring the compound powder, the Paenibacillus mucilaginosus, the seaweed extract, the polycaprolactone and the hydrophobic nano-silicon dioxide, and discharging to obtain the phosphorus activated preparation.
2. A method of preparing a phospho-activated formulation according to claim 1, characterised in that: The mass ratio of the hydrotalcite to the deionized water in step S11 is 1:15-20; the ultrasonic treatment refers to setting the ultrasonic frequency to 30-50 kHz, the ultrasonic power to 550-650 W, and performing ultrasonic treatment for 25-35 min.
3. A method of preparing a phospho-activated formulation according to claim 1, characterised in that: The mass ratio of the modified humic acid-citric acid compound powder to the suspension in step S12 is 1:4.2-6.8; the initial rotating speed is 7500-8500 rpm; the increasing rotating speed stirring refers to increasing the rotating speed to 9000-11000 rpm for stirring for 1.2-1.8 h.
4. A method of preparing a phospho-activated formulation according to claim 1, characterised in that: The preparation method of the modified humic acid-citric acid compound powder in step S12 comprises the following steps: S21, uniformly mixing the humic acid powder and the citric acid powder to obtain a mixed dry material; S22, activating the mixed dry material by using a hydrogen peroxide solution, and then performing spray drying to obtain the modified humic acid-citric acid compound powder.
5. A method of preparing a phospho-activated formulation according to claim 4, characterised in that: The mass ratio of the humic acid powder to the citric acid powder in step S21 is 1:0.3-0.4; the mass ratio of the mixed dry material to the hydrogen peroxide solution in step S22 is 1:5.5-7.5; the mass concentration of hydrogen peroxide in the hydrogen peroxide solution is 0.6-1 wt%; and the activation refers to stirring at 200-300 rpm and at 60-70 ℃ for 4-6 h.
6. A method of preparing a phospho-activated formulation according to claim 1, characterised in that: The temperature control and stirring in step S13 refers to stirring at 60-70 ℃ for 7-9 h.
7. A method of preparing a phospho-activated formulation according to claim 1, characterized in that: The mass ratio of the compound powder, the Paenibacillus mucilaginosus, the seaweed extract, the polycaprolactone and the hydrophobic nano-silicon dioxide in step S14 is 12.5-13.5:2.5-3.5:2.5-3.5:0.75-0.85:0.15-0.25; and the mixing and stirring refers to stirring at 10-20 rpm for 30-60 min.
8. A phosphorus activated preparation prepared by the preparation method in claims 1-7.
9. Use of a phosphorus-activated preparation as claimed in claim 8, characterized in that: The phosphorus activated preparation is applied to chemical fertilizers.
10. Use of a phospho-activated formulation according to claim 9, characterized in that: The addition amount of the phosphorus activated preparation in the chemical fertilizer is 0.5-1 wt% of the mass of the chemical fertilizer.