Vitamin B12 solid fertilizer for promoting healthy development of plants and preparation method of vitamin B12 solid fertilizer

Abstract

The invention relates to the technical field of fertilizers, in particular to a vitamin B12 solid fertilizer for promoting healthy development of plants and a preparation method of the vitamin B12 solid fertilizer. 10 to 30 parts of a phosphorus source; 10 to 20 parts of a potassium source; 0.1 to 0.5 part of vitamin B12; 2 to 10 parts of trace elements; 10 to 20 parts of an adsorbent; 1 to 5 parts of a binder; and 5-10 parts of a composite synergist. Through multiple mechanisms that the orange peel regulates the soil, the proline enhances the stress resistance, the boron nitride promotes the root system and blocks harmful substances, the nitrification inhibitor slows down the nitrogen loss, the modified kaolin is combined with the GO graphene and the chitosan to improve the nutrient adsorption capacity, and the binder forms a stable structure, the healthy development of plants is comprehensively promoted. The process details of raw material pretreatment, mixing sequence, stirring speed control, low-temperature vacuum drying, vibrating screen screening and the like are emphasized in the preparation process, so that uniform and stable components of the fertilizer are ensured, and the problems of single nutritional component, insufficient stress resistance, limited cellular level effect, limited quality improvement and the like are solved.

Description

Technical Field

[0001] The present invention relates to the field of fertilizers, and particularly to a vitamin B12 solid fertilizer for promoting the healthy development of plants and a preparation method thereof. Background Art

[0002] In the agricultural production system, fertilizers always play an irreplaceable and crucial role and are one of the core elements to ensure the healthy growth of plants and achieve high yields and good quality of crops. The growth and development of plants rely on the support of various nutrients, and fertilizers are the main supply source of these nutrients.

[0003] Traditional fertilizers, such as common single-element chemical fertilizers and some simple compound fertilizers, have indeed met the basic requirements of plants for major elements such as nitrogen, phosphorus, and potassium to a certain extent in long-term agricultural practices. They provide the necessary material basis for plant growth, enabling crops to carry out a series of physiological activities such as photosynthesis and respiration normally, thus ensuring basic agricultural production.

[0004] However, with the continuous acceleration of the agricultural modernization process, the agricultural production mode is gradually shifting towards intensification, high efficiency, and sustainability, posing more stringent and diverse requirements for the performance and efficacy of fertilizers. The limitations of traditional fertilizers are becoming increasingly prominent. In promoting the healthy development of plants, traditional fertilizers often only focus on the basic growth needs of plants, while ignoring the coordinated needs of plants for multiple nutrient elements throughout the growth cycle and their ability to cope with environmental stresses. For example, when plants encounter adverse conditions such as drought, high temperature, low temperature, and pest and disease attacks, traditional fertilizers cannot provide sufficient support for plants to enhance their stress resistance, resulting in inhibited plant growth and affected yield and quality.

[0005] In terms of improving plant stress resistance, due to the limitations of their composition and action mechanism, traditional fertilizers are difficult to play an active role at the plant cell level and enhance the immunity and self-repair ability of plants. In the face of the increasingly complex and changeable natural environment and the increasing threats of pests and diseases, relying solely on traditional fertilizers can no longer meet the expectations of modern agricultural production for plant stress resistance.

[0006] In addition, with the continuous improvement of people's requirements for the quality of agricultural products, not only the yield of agricultural products is concerned, but also multiple indicators such as their nutritional components, taste and flavor, and safety are emphasized. Traditional fertilizers have obvious deficiencies in improving the quality of agricultural products, unable to accurately regulate the absorption and metabolism of various nutrient elements by plants and difficult to meet the needs of consumers for high-quality agricultural products. Summary of the Invention

[0007] The present application provides a vitamin B12 solid fertilizer for promoting the healthy development of plants and a preparation method thereof, so as to solve the problems of single nutrient components, insufficient stress resistance, limited effects at the cellular level, and limited quality improvement in the related art.

[0008] To achieve the above object, the technical solution adopted by the present invention is as follows: The present invention provides a vitamin B12 solid fertilizer for promoting the healthy development of plants. The solid fertilizer is composed of the following components in parts by weight: nitrogen source: 10 - 40 parts; phosphorus source: 10 - 30 parts; potassium source: 8 - 22 parts; vitamin B12: 0.1 - 0.5 part; trace elements: 1 - 10 parts; adsorbent: 5 - 25 parts; binder: 1 - 5 parts; composite synergist: 2 - 12 parts.

[0009] Further, the solid fertilizer is composed of the following components in parts by weight: nitrogen source: 20 - 30 parts; phosphorus source: 15 - 25 parts; potassium source: 10 - 20 parts; vitamin B12: 0.2 - 0.4 part; trace elements: 2 - 8 parts; adsorbent: 10 - 20 parts; binder: 2 - 4 parts; composite synergist: 5 - 10 parts.

[0010] Further, the composite synergist is composed of the following components in parts by weight: orange peel: 2 - 4 parts; proline: 1 - 3 parts; boron nitride: 0.5 - 1.5 parts; nitrification inhibitor: 0.5 - 1.5 parts.

[0011] Further, the nitrification inhibitor is a mixture of 3,4 - dimethylpyrazole phosphate and N - (n - propyl) - thiophosphoric triamide.

[0012] Further, the nitrogen source is one or more of urea, ammonium nitrate, and ammonium chloride, the phosphorus source is one or more of monoammonium phosphate, diammonium phosphate, and superphosphate, and the potassium source is potassium sulfate.

[0013] Further, the trace elements are at least one of iron, zinc, and manganese elements.

[0014] Further, the adsorbent is modified kaolin, wherein the modified kaolin is a uniform mixture of kaolin, GO graphene, and chitosan in a mass ratio of (10 - 20):(1 - 3):(2 - 5).

[0015] Further, the binder is a mixture of sodium carboxymethyl cellulose and polyvinyl alcohol in a mass ratio of (1 - 3):1.

[0016] The present invention also provides a method for preparing a vitamin B12 solid fertilizer for promoting the healthy development of plants. The preparation method includes: pre-treating the raw materials; slowly dripping an aqueous solution of trace elements into the pre-treated raw materials, while stirring at a speed of 200-400 revolutions per minute for 10-15 minutes to ensure the uniform distribution of trace elements; pre-mixing vitamin B12 with modified kaolin, and then adding it to the above-mentioned materials, and stirring at a speed of 250-450 revolutions per minute for 10-15 minutes; adding a composite synergist to the materials, and stirring at a speed of 300-500 revolutions per minute for 10-15 minutes; adding the mixed binder to the materials, and stirring at a speed of 200-350 revolutions per minute for 5-10 minutes; feeding the uniformly mixed materials into an extrusion granulator for granulation, feeding the granulated fertilizer particles into a low-temperature vacuum drying device, drying for 3-5 hours under the conditions of 50-70 °C and a vacuum degree of -0.08--0.1 MPa, then screening through a vibrating screen to remove the particles with unqualified particle sizes, and hermetically packaging the qualified fertilizer particles to obtain the vitamin B12 solid fertilizer for promoting the healthy development of plants.

[0017] Further, the pre-treatment includes: using a mechanical crushing device to crush the nitrogen source, phosphorus source, and potassium source to 100-200 mesh respectively, accurately weighing the trace elements, preparing a uniform aqueous solution, and sequentially preparing modified kaolin, a composite synergist, and a binder.

[0018] The beneficial effects obtained by the above present invention are as follows: 1. The present invention prepares a vitamin B12 solid fertilizer for promoting the healthy development of plants and its preparation method. In the composite synergist, orange peel creates a good growth environment for plant roots by adjusting the soil pH value and promoting the growth of beneficial microorganisms, and at the same time activates the nutrients in the soil, providing a basic condition for the function of other components. When plants encounter adversity, proline protects plant cells from damage by regulating osmotic pressure and antioxidant effects, enabling plants to better adapt to environmental changes, thus ensuring that other components can also function normally under adverse conditions. Boron nitride can form a nano-level protective film. This protective film has a certain pore structure, which can not only allow water and nutrients to freely enter and exit, but also block the intrusion of some harmful substances and pathogens. At the same time, boron nitride can also interact with the cells on the surface of plant roots, stimulating the division and elongation of root cells, promoting the growth and development of roots, and cooperating with orange peel to improve the soil environment and proline to enhance plant stress resistance to jointly promote the absorption efficiency of plant roots for water and nutrients; 2. Secondly, the nitrification inhibitor used in the present invention is a mixture of 3,4-dimethylpyrazole phosphate and N-propylthiophosphoric triamide. In the soil, ammonium nitrogen will be gradually converted into nitrate nitrogen under the action of nitrifying bacteria. However, nitrate nitrogen is not easily adsorbed by soil particles and is prone to leaching loss with rainwater or irrigation water. At the same time, it may also be converted into nitrogen gas and lost to the atmosphere through denitrification, resulting in a large loss of nitrogen. The nitrification inhibitor can specifically inhibit the activity of nitrifying bacteria and slow down the conversion rate of ammonium nitrogen to nitrate nitrogen. Specifically, in the early stage of the nitrification process, 3,4-dimethylpyrazole phosphate has a specific interaction with ammonia monooxygenase. The pyrazole ring structure in the 3,4-dimethylpyrazole phosphate molecule can be embedded into the active site of ammonia monooxygenase and form non-covalent interactions such as hydrogen bonds and van der Waals forces with the key amino acid residues in the active site, stabilizing the inactive conformation of ammonia monooxygenase. This stabilizing effect makes ammonia monooxygenase unable to normally bind to the substrate ammonium nitrogen, thus blocking the conversion process of ammonium nitrogen to hydroxylamine. In the later stage of the nitrification process, N-propylthiophosphoric triamide mainly acts on hydroxylamine oxidoreductase. Hydroxylamine oxidoreductase is responsible for further oxidizing hydroxylamine to nitrous acid, which is the second key step in the nitrification process. The thiophosphate group in the N-propylthiophosphoric triamide molecule can strongly bind to the active center of hydroxylamine oxidoreductase, thereby changing the structure of the active center of hydroxylamine oxidoreductase and causing a significant decrease in the affinity of the active site of the enzyme for the substrate hydroxylamine. At the same time, the binding of N-propylthiophosphoric triamide to hydroxylamine oxidoreductase may also affect the electron transfer process of the enzyme because hydroxylamine oxidoreductase involves electron transfer in the catalytic reaction process. Due to the interference of N-propylthiophosphoric triamide, the electron transfer is blocked, making hydroxylamine unable to be effectively oxidized to nitrous acid and preventing the further progress of the nitrification process. Through the synergistic effect of 3,4-dimethylpyrazole phosphate and N-propylthiophosphoric triamide, the present invention precisely inhibits the activity of nitrifying bacteria at different stages of the nitrification process, effectively slows down the conversion of ammonium nitrogen to nitrate nitrogen, reduces nitrogen loss, improves the utilization rate of nitrogen fertilizer, provides a more lasting and stable nitrogen source support for plants, and promotes the healthy growth of plants; 3. The present invention prepares modified kaolin as an adsorbent, wherein kaolin provides basic ion exchange adsorption sites, providing a basis for the initial adsorption of a large number of nutrient ions. GO graphene, with its ultra-large specific surface area and rich oxygen-containing functional groups, not only increases the overall adsorption area, but also, through compounding with kaolin, allows its structure to be stacked with the layered structure of kaolin, increasing the overall specific surface area of ​​the adsorbent, providing more adsorption sites for nutrient ions, and enhancing the adsorption capacity for various nutrient ions. At the same time, the functional groups on the surface of GO graphene can react with the amino and hydroxyl groups of chitosan to form a more stable composite structure. Chitosan further improves the adsorption and fixation capacity of nutrients such as trace elements through chelation and flocculation, and cooperates with kaolin and GO graphene to enable the entire adsorbent system to more comprehensively and effectively adsorb various nutrients in fertilizers, so that the modified kaolin adsorbent has a far greater effect than a single component in reducing fertilizer nutrient loss and improving fertilizer utilization, providing a continuous and stable nutrient supply for plant growth; 4. The present invention adds a binder, wherein the carboxymethyl group of sodium carboxymethyl cellulose and the hydroxyl group of polyvinyl alcohol form hydrogen bonds or ion-dipole interactions, so that the molecular chains of the two polymers can be better intertwined with each other to form a more complex and stable network structure. Sodium carboxymethyl cellulose provides initial bonding force for the fertilizer particles through electrostatic attraction and physical entanglement, while the tough film formed by polyvinyl alcohol further enhances the bonding strength and stability. In addition, for some fertilizer particles with uneven surface charge distribution, sodium carboxymethyl cellulose can be preferentially adsorbed on positively charged sites through electrostatic action, while polyvinyl alcohol can form a more uniform coverage on the particle surface through hydrogen bonding. With the evaporation of water and the solidification of the binder, a three-dimensional bonding network is formed between the fertilizer particles, which tightly binds the fertilizer particles together, significantly improving the molding effect and strength of the fertilizer particles; 5. The present invention proposes a method for preparing a vitamin B12 solid fertilizer that promotes healthy plant development. By pretreating the raw materials, the particle size and uniformity of each component are ensured, laying a good foundation for subsequent mixing and reaction. During the mixing process, the components are added in a specific order and stirring speed, so that trace elements, vitamin B12, composite synergists and binders can be evenly dispersed in the fertilizer system, ensuring the uniformity and stability of the fertilizer components. The low-temperature vacuum drying process can effectively remove moisture from the fertilizer particles and avoid the destruction of the active ingredients in the fertilizer by high temperature, thereby improving the quality of the fertilizer. Unqualified particles are removed by screening with a vibrating screen to ensure the consistency and use effect of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where: Figure 1 SEM image of the nitrification inhibitor provided for an embodiment of the present invention; Figure 2 Schematic diagram of the adsorption property provided for Embodiment 4 of the present invention. Detailed Description of the Invention

[0020] The technical solutions of the present invention are described below through specific specific examples. It should be understood that one or more method steps mentioned in the present invention do not exclude the existence of other method steps before and after the combined steps or that other method steps can be inserted between these clearly mentioned steps; it should also be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. Moreover, unless otherwise stated, the numbers of each method step are only convenient tools for identifying each method step, rather than limiting the arrangement order of each method step or the scope in which the present invention can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope in which the present invention can be implemented.

[0021] To better understand the above technical solutions, the exemplary embodiments of the present invention are described in more detail below. Although the exemplary embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be understood more thoroughly and the scope of the present invention can be fully communicated to those skilled in the art.

[0022] The present invention is further described below in conjunction with the following embodiments.

[0023] Embodiment 1 The present invention provides a vitamin B12 solid fertilizer for promoting the healthy development of plants. The solid fertilizer is composed of the following weight parts: nitrogen source: 20 parts; phosphorus source: 15 parts; potassium source: 10 parts; vitamin B12: 0.2 part; trace elements: 2 parts; adsorbent: 10 parts; binder: 2 parts; composite synergist: 5 parts.

[0024] Among them, the composite synergist is composed of the following weight parts: orange peel: 2 parts; proline: 1 part; boron nitride: 0.5 part; nitrification inhibitor: 0.5 part.

[0025] Among them, as Figure 1 shown, the nitrification inhibitor is a mixture of 3,4-dimethylpyrazole phosphate and N-propylthiophosphoric triamide.

[0026] Among them, the nitrogen source is one or more of urea, ammonium nitrate, and ammonium chloride; the phosphorus source is one or more of monoammonium phosphate, diammonium phosphate, and superphosphate; the potassium source is potassium sulfate.

[0027] Among them, the trace element is at least one of iron, zinc, and manganese elements.

[0028] Among them, the adsorbent is modified kaolin, and the modified kaolin is a uniform mixture of kaolin, GO graphene, and chitosan in a mass ratio of 10:1:2.

[0029] Among them, the binder is a mixture of sodium carboxymethylcellulose and polyvinyl alcohol in a mass ratio of 1:1.

[0030] The present invention also provides a preparation method of a vitamin B12 solid fertilizer for promoting the healthy development of plants. The preparation method includes: pretreating the raw materials; slowly dropping the trace element aqueous solution into the pretreated raw materials, and at the same time stirring at a speed of 200 - 400 revolutions per minute for 10 - 15 minutes to ensure the uniform distribution of the trace elements; premixing vitamin B12 with the modified kaolin, and then adding it to the above materials, and stirring at a speed of 250 - 450 revolutions per minute for 10 - 15 minutes; adding the composite synergist to the materials, and stirring at a speed of 300 - 500 revolutions per minute for 10 - 15 minutes; adding the mixed binder to the materials, and stirring at a speed of 200 - 350 revolutions per minute for 5 - 10 minutes; feeding the uniformly mixed materials into an extrusion granulator for granulation, feeding the granulated fertilizer particles into a low-temperature vacuum drying device, drying for 3 - 5 hours under the conditions of 50 - 70 °C and a vacuum degree of -0.08 to -0.1 MPa, then screening through a vibrating screen to remove the particles with unqualified particle sizes, and hermetically packaging the qualified fertilizer particles to obtain the vitamin B12 solid fertilizer for promoting the healthy development of plants.

[0031] Among them, the pretreatment includes: using a mechanical crushing device to crush the nitrogen source, phosphorus source, and potassium source to 100 - 200 meshes respectively, accurately weighing the trace elements, preparing a uniform aqueous solution, and successively preparing the modified kaolin, composite synergist, and binder.

[0032] Example 2 The present invention provides a vitamin B12 solid fertilizer for promoting the healthy development of plants. The solid fertilizer is composed of the following weight parts: nitrogen source: 22 parts; phosphorus source: 17 parts; potassium source: 12 parts; vitamin B12: 0.25 part; trace element: 3 parts; adsorbent: 12 parts; binder: 2.5 parts; composite synergist: 6 parts.

[0033] Among them, the composite synergist is composed of the following weight parts: orange peel: 2.5 parts; proline: 1.5 parts; boron nitride: 0.7 part; nitrification inhibitor: 0.7 part.

[0034] Among them, as Figure 1 shown, the nitrification inhibitor is a mixture of 3,4-dimethylpyrazole phosphate and N-propyl thiophosphoric triamide.

[0035] Among them, the nitrogen source is one or more of urea, ammonium nitrate, and ammonium chloride, the phosphorus source is one or more of monoammonium phosphate, diammonium phosphate, and superphosphate, and the potassium source is potassium sulfate.

[0036] Among them, the trace element is at least one of iron, zinc, and manganese elements.

[0037] Among them, the adsorbent is modified kaolin, and among them, the modified kaolin is a uniform mixture of kaolin, GO graphene, and chitosan in a mass ratio of 12:1.5:3.

[0038] Among them, the binder is a mixture of sodium carboxymethyl cellulose and polyvinyl alcohol in a mass ratio of 1.5:1.

[0039] The present invention also provides a preparation method of a vitamin B12 solid fertilizer for promoting the healthy development of plants. The preparation method includes: pretreating the raw materials; slowly dropping an aqueous solution of trace elements into the pretreated raw materials while stirring at a speed of 200-400 revolutions per minute for 10-15 minutes to ensure the uniform distribution of trace elements; premixing vitamin B12 with modified kaolin and then adding it to the above materials and stirring at a speed of 250-450 revolutions per minute for 10-15 minutes; adding a composite synergist to the materials and stirring at a speed of 300-500 revolutions per minute for 10-15 minutes; adding the mixed binder to the materials and stirring at a speed of 200-350 revolutions per minute for 5-10 minutes; feeding the uniformly mixed materials into an extrusion granulator for granulation, feeding the granulated fertilizer particles into a low-temperature vacuum drying device, drying for 3-5 hours under the conditions of 50-70°C and a vacuum degree of -0.08--0.1 MPa, then screening through a vibrating screen to remove particles with unqualified particle sizes, and sealing and packaging the qualified fertilizer particles to obtain a vitamin B12 solid fertilizer for promoting the healthy development of plants.

[0040] Among them, the pretreatment includes: using a mechanical crushing device to crush the nitrogen source, phosphorus source, and potassium source to 100-200 meshes respectively, accurately weighing trace elements, preparing a uniform aqueous solution, and sequentially preparing modified kaolin, a composite synergist, and a binder.

[0041] Example 3 The present invention provides a vitamin B12 solid fertilizer for promoting the healthy development of plants. The solid fertilizer is composed of the following weight parts: nitrogen source: 25 parts; phosphorus source: 20 parts; potassium source: 15 parts; vitamin B12: 0.3 part; trace element: 5 parts; adsorbent: 15 parts; binder: 3 parts; composite synergist: 7 parts.

[0042] Among them, the composite synergist is composed of the following components by weight: orange peel: 3 parts; proline: 2 parts; boron nitride: 1.0 part; nitrification inhibitor: 1.0 part.

[0043] Among them, as Figure 1 shown, the nitrification inhibitor is a mixture of 3,4-dimethylpyrazole phosphate and N-propylthiophosphoric triamide.

[0044] Among them, the nitrogen source is one or more of urea, ammonium nitrate, and ammonium chloride, the phosphorus source is one or more of monoammonium phosphate, diammonium phosphate, and superphosphate, and the potassium source is potassium sulfate.

[0045] Among them, the trace element is at least one of iron, zinc, and manganese elements.

[0046] Among them, the adsorbent is modified kaolin, and the modified kaolin is a uniform mixture of kaolin, GO graphene, and chitosan in a mass ratio of 15:2:3.5.

[0047] Among them, the binder is a mixture of sodium carboxymethyl cellulose and polyvinyl alcohol in a mass ratio of 2:1.

[0048] The present invention also provides a preparation method of a vitamin B12 solid fertilizer for promoting the healthy development of plants. The preparation method includes: pre-treating the raw materials; slowly dropping an aqueous solution of trace elements into the pre-treated raw materials while stirring at a speed of 200 - 400 revolutions per minute for 10 - 15 minutes to ensure the uniform distribution of trace elements; pre-mixing vitamin B12 with modified kaolin and then adding it to the above-mentioned materials and stirring at a speed of 250 - 450 revolutions per minute for 10 - 15 minutes; adding the composite synergist to the materials and stirring at a speed of 300 - 500 revolutions per minute for 10 - 15 minutes; adding the mixed binder to the materials and stirring at a speed of 200 - 350 revolutions per minute for 5 - 10 minutes; feeding the uniformly mixed materials into an extrusion granulator for granulation, feeding the granulated fertilizer particles into a low-temperature vacuum drying device, drying for 3 - 5 hours under the conditions of 50 - 70 °C and a vacuum degree of -0.08 to -0.1 MPa, then screening through a vibrating screen to remove the particles with unqualified particle sizes, and sealing and packaging the qualified fertilizer particles to obtain the vitamin B12 solid fertilizer for promoting the healthy development of plants.

[0049] Among them, the pre-treatment includes: using a mechanical crushing device to crush the nitrogen source, phosphorus source, and potassium source to 100 - 200 meshes respectively, accurately weighing the trace elements, preparing a uniform aqueous solution, and successively preparing modified kaolin, composite synergist, and binder.

[0050] Example 4 The present invention provides a vitamin B12 solid fertilizer for promoting the healthy development of plants. The solid fertilizer is composed of the following components in parts by weight: nitrogen source: 28 parts; phosphorus source: 22 parts; potassium source: 18 parts; vitamin B12: 0.35 part; trace elements: 6 parts; adsorbent: 18 parts; binder: 3.5 parts; composite synergist: 8 parts.

[0051] Among them, the composite synergist is composed of the following components in parts by weight: orange peel: 3.5 parts; proline: 2.5 parts; boron nitride: 1.2 parts; nitrification inhibitor: 1.2 parts.

[0052] Among them, as Figure 1 shown, the nitrification inhibitor is a mixture of 3,4-dimethylpyrazole phosphate and N-propyl thiophosphoric triamide.

[0053] Among them, the nitrogen source is one or more of urea, ammonium nitrate, and ammonium chloride, the phosphorus source is one or more of monoammonium phosphate, diammonium phosphate, and superphosphate, and the potassium source is potassium sulfate.

[0054] Among them, the trace elements are at least one of iron, zinc, and manganese elements.

[0055] Among them, the adsorbent is modified kaolin, and the modified kaolin is a uniform mixture of kaolin, GO graphene, and chitosan in a mass ratio of 18:2.5:4.

[0056] Among them, the binder is a mixture of sodium carboxymethyl cellulose and polyvinyl alcohol in a mass ratio of 2.5:1.

[0057] The present invention also provides a preparation method of the vitamin B12 solid fertilizer for promoting the healthy development of plants. The preparation method includes: pre-treating the raw materials; slowly dropping an aqueous solution of trace elements into the pre-treated raw materials while stirring at a speed of 200 - 400 revolutions per minute for 10 - 15 minutes to ensure the uniform distribution of the trace elements; pre-mixing vitamin B12 with the modified kaolin, and then adding it to the above-mentioned materials and stirring at a speed of 250 - 450 revolutions per minute for 10 - 15 minutes; adding the composite synergist to the materials and stirring at a speed of 300 - 500 revolutions per minute for 10 - 15 minutes; adding the mixed binder to the materials and stirring at a speed of 200 - 350 revolutions per minute for 5 - 10 minutes; feeding the uniformly mixed materials into an extrusion granulator for granulation, feeding the granulated fertilizer particles into a low-temperature vacuum drying device, drying for 3 - 5 hours under the conditions of 50 - 70°C and a vacuum degree of -0.08 to -0.1 MPa, then screening through a vibrating screen to remove the particles with unqualified particle sizes, and hermetically packaging the qualified fertilizer particles to obtain the vitamin B12 solid fertilizer for promoting the healthy development of plants.

[0058] Among them, the pretreatment includes: using a mechanical crushing device to crush the nitrogen source, phosphorus source, and potassium source to 100-200 mesh respectively, accurately weighing trace elements, preparing a uniform aqueous solution, and sequentially preparing modified kaolin, a composite synergist, and a binder.

[0059] Example 5 The present invention provides a vitamin B12 solid fertilizer for promoting the healthy development of plants. The solid fertilizer is composed of the following weight parts: nitrogen source: 30 parts; phosphorus source: 25 parts; potassium source: 20 parts; vitamin B12: 0.4 part; trace elements: 8 parts; adsorbent: 20 parts; binder: 4 parts; composite synergist: 10 parts.

[0060] Among them, the composite synergist is composed of the following weight parts: orange peel: 4 parts; proline: 3 parts; boron nitride: 1.5 parts; nitrification inhibitor: 1.5 parts.

[0061] Among them, as Figure 1 shown, the nitrification inhibitor is a mixture of 3,4-dimethylpyrazole phosphate and N-propylthiophosphoric triamide.

[0062] Among them, the nitrogen source is one or more of urea, ammonium nitrate, and ammonium chloride, the phosphorus source is one or more of monoammonium phosphate, diammonium phosphate, and superphosphate, and the potassium source is potassium sulfate.

[0063] Among them, the trace elements are at least one of iron, zinc, and manganese elements.

[0064] Among them, the adsorbent is modified kaolin, and the modified kaolin is a uniform mixture of kaolin, GO graphene, and chitosan in a mass ratio of 20:3:5.

[0065] Among them, the binder is a mixture of sodium carboxymethyl cellulose and polyvinyl alcohol in a mass ratio of 3:1.

[0066] The present invention also provides a method for preparing a vitamin B12 solid fertilizer for promoting the healthy development of plants. The preparation method includes: pre-treating the raw materials; slowly dripping an aqueous solution of trace elements into the pre-treated raw materials while stirring at a speed of 200 - 400 revolutions per minute for 10 - 15 minutes to ensure the uniform distribution of trace elements; pre-mixing vitamin B12 with modified kaolin and then adding it to the above-mentioned materials and stirring at a speed of 250 - 450 revolutions per minute for 10 - 15 minutes; adding a composite synergist to the materials and stirring at a speed of 300 - 500 revolutions per minute for 10 - 15 minutes; adding the mixed binder to the materials and stirring at a speed of 200 - 350 revolutions per minute for 5 - 10 minutes; feeding the uniformly mixed materials into an extrusion granulator for granulation, feeding the granulated fertilizer particles into a low-temperature vacuum drying device, drying for 3 - 5 hours under the conditions of 50 - 70°C and a vacuum degree of -0.08 to -0.1 MPa, then screening through a vibrating screen to remove the particles with unqualified particle sizes, and hermetically packaging the qualified fertilizer particles to obtain the vitamin B12 solid fertilizer for promoting the healthy development of plants.

[0067] Among them, the pre-treatment includes: using a mechanical pulverizing device to pulverize the nitrogen source, phosphorus source, and potassium source to 100 - 200 meshes respectively, accurately weighing the trace elements, preparing a uniform aqueous solution, and sequentially preparing modified kaolin, a composite synergist, and a binder.

[0068] Comparative Example 1 A vitamin B12 solid fertilizer for promoting the healthy development of plants, which is different from Example 1 only in that the composite synergist does not contain boron nitride and nitrification inhibitor, and the reduced amounts of boron nitride and nitrification inhibitor are apportioned to proline, and the remaining preparation process is the same as that of Example 1.

[0069] Comparative Example 2 A vitamin B12 solid fertilizer for promoting the healthy development of plants, which is different from Example 1 only in that the component of the adsorbent is directly kaolin, and the remaining preparation process is the same as that of Example 1.

[0070] Comparative Example 3 A vitamin B12 solid fertilizer for promoting the healthy development of plants, which is different from Example 1 only in that the composite synergist does not contain boron nitride and nitrification inhibitor, the component of the adsorbent is directly kaolin, and the reduced amounts of boron nitride and nitrification inhibitor are apportioned to proline, and the remaining preparation process is the same as that of Example 1.

[0071] Performance Test The vitamin B12 solid fertilizers prepared in Examples 1 - 5 and Comparative Examples 1 - 3 were respectively used to plant the same crop variety under the same soil conditions, and the isotope tracing method was used to measure the proportions of nitrogen, phosphorus, and potassium elements absorbed and utilized by plants under different fertilizer treatments. The results are shown in Table 1 below.

[0072] Table 1 Element Proportions Nitrogen utilization rate (%) Phosphorus utilization rate (%) Potassium utilization rate (%) Example 1 48 40 39 Example 2 50 42 43 Example 3 53 45 47 Example 4 57 49 51 Example 5 55 47 50 Comparative Example 1 30 28 31 Comparative Example 2 40 35 34 Comparative Example 3 25 25 26 As can be seen from Table 1, in Examples 1 - 5, with the optimization of the proportions of each component in the formulation, the utilization rates of nitrogen, phosphorus, and potassium all showed an overall upward trend. In particular, the addition of components such as modified kaolin adsorbent, compound synergist, and boron nitride significantly improved the nutrient retention and plant absorption efficiency.

[0073] Specifically, Example 4 achieved the highest nitrogen utilization rate of 57%, phosphorus utilization rate of 49%, and potassium utilization rate of 51%, indicating the positive impact of formulation adjustment on nutrient utilization rate. In contrast, in the comparative examples, due to the lack of certain key components or unmodified adsorbents, the nutrient utilization rate decreased significantly. Comparative Example 1 lacked boron nitride and nitrification inhibitor, Comparative Example 2 directly used kaolin without modification, and Comparative Example 3 lacked multiple key components at the same time, and its nitrogen, phosphorus, and potassium utilization rates were the lowest.

[0074] The vitamin B12 solid fertilizers prepared in Examples 1 - 5 and Comparative Examples 1 - 3 were respectively used to fertilize plants. In the same planting environment and time period, the plant height was regularly measured, the plant height growth data from planting to harvest was recorded, and the chlorophyll content in the leaves was determined by the spectrophotometer method. The results are shown in Table 2 below.

[0075] Table 2 Plant Growth Data Plant height increase (cm) Root dry weight (g) Chlorophyll content (mg / g) Example 1 18.5 2.8 39 Example 2 20.2 3.1 43 Example 3 22.0 3.4 47 Example 4 25.1 4.0 51 Example 5 23.5 3.7 50 Comparative Example 1 15.0 2.2 31 Comparative Example 2 12.0 1.8 34 Comparative Example 3 10.0 1.5 26 From Figure 2 and Table 2, it can be seen that in Examples 1 - 5, plants were fertilized with the specifically prepared vitamin B12 solid fertilizer. The results showed that the plant height growth data ranged from 18.5 cm to 25.1 cm, and the average plant height was about 21.86 cm. Among them, the fertilizer effect of Example 4 was the most significant, and the plant height growth reached 25.1 cm. At the same time, the dry root weight data of plants in these examples ranged from 2.8 g to 4.0 g, and the average dry root weight was about 3.4 g. The fertilizer effect of Example 4 was also the best, and the dry root weight reached 4.0 g. In addition, the chlorophyll content data of plant leaves in the examples ranged from 39 mg / g to 51 mg / g, and the average chlorophyll content was about 46 mg / g. The chlorophyll content of Example 4 was the highest, at 51 mg / g, indicating that it is related to factors such as strong adsorbability of the fertilizer, high nutrient utilization rate, and improvement of soil structure.

[0076] In contrast, in Comparative Examples 1-3, fertilizers prepared by different methods were used for fertilization. The results showed that the plant height growth, dry root weight, and chlorophyll content of the plants were significantly lower than the data in the Examples. Specifically, the range of plant height growth data in the comparative examples was between 10.0 cm and 15.0 cm, and the average plant height was about 12.33 cm; the range of dry root weight data was between 1.5 g and 2.2 g, and the average dry root weight was about 1.83 g; the range of chlorophyll content data was between 26 mg / g and 34 mg / g, and the average chlorophyll content was about 30.33 mg / g. The fertilizers in Comparative Examples 1-3 may have weak adsorption, resulting in serious nutrient loss and low utilization rate, which in turn affected the growth performance of the plants.

[0077] Under a simulated drought environment, the vitamin B12 solid fertilizers prepared in Examples 1-5 and Comparative Examples 1-3 were used to impose water restriction treatments on the planted plants, and the survival conditions of the plants were observed and recorded. At the same time, the occurrence of plant diseases and pests was regularly observed and recorded. The test results are shown in Table 3 below.

[0078] Table 3 Growth Survival Rate Drought stress survival rate (%) Incidence of pests and diseases (%) Example 1 90 12 Example 2 92 10 Example 3 95 8 Example 4 98 5 Example 5 97 6 Comparative Example 1 75 18 Comparative Example 2 65 22 Comparative Example 3 55 28 As can be seen from Table 3, the vitamin B12 solid fertilizers prepared in Examples 1-5 significantly improved the survival rate of plants and reduced the incidence of diseases and pests under a simulated drought environment. Their performance was superior to that of Comparative Examples 1-3, showing their potential value in agricultural applications.

[0079] In summary, the embodiments of the present application provide a vitamin B12 solid fertilizer for promoting the healthy development of plants. Through multiple mechanisms such as regulating the soil with orange peels, enhancing stress resistance with proline, promoting root growth and blocking harmful substances with boron nitride, slowing down nitrogen loss with nitrification inhibitors, improving nutrient adsorption capacity by combining modified kaolin with GO graphene and chitosan, and forming a stable structure with binders, it comprehensively promotes the healthy development of plants. During the preparation process, attention is paid to process details such as raw material pretreatment, mixing order, stirring speed control, low-temperature vacuum drying, and vibrating screen screening to ensure the uniform and stable composition of the fertilizer, and problems such as single nutrient composition, insufficient stress resistance, limited cell-level effects, and limited quality improvement are solved.

[0080] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A vitamin B12 solid fertilizer for promoting healthy plant development, characterized in that: The solid fertilizer is composed of the following weight proportions: Nitrogen source: 10-40 parts; Phosphorus source: 10-30 parts; Potassium source: 8-22 parts; Vitamin B12: 0.1-0.5 parts; Trace elements: 1-10 parts; Adsorbent: 5-25 parts; Binder: 1-5 parts; Composite synergist: 2-12 parts.

2. A vitamin B12 solid fertilizer for promoting healthy plant development according to claim 1, characterized in that: The solid fertilizer is composed of the following weight proportions: Nitrogen source: 20-30 parts; Phosphorus source: 15-25 parts; Potassium source: 10-20 parts; Vitamin B12: 0.2-0.4 parts; Trace elements: 2-8 parts; Adsorbent: 10-20 parts; Binder: 2-4 parts; Composite synergist: 5-10 parts.

3. A vitamin B12 solid fertilizer for promoting healthy plant development according to claim 2, characterized in that: The composite synergist is composed of the following weight ratios: Orange peel: 2-4 parts; Proline: 1-3 parts; Boron nitride: 0.5-1.5 parts; Nitrification inhibitor: 0.5-1.5 parts.

4. A vitamin B12 solid fertilizer for promoting healthy plant development according to claim 3, characterized in that: The nitrification inhibitor is a mixture of 3,4-dimethylpyrazole phosphate and n-propyl-thiophosphate triamide.

5. A vitamin B12 solid fertilizer for promoting healthy plant development according to claim 2, characterized in that: The nitrogen source is one or more of urea, ammonium nitrate, and ammonium chloride; the phosphorus source is one or more of monoammonium phosphate, diammonium phosphate, and superphosphate; and the potassium source is potassium sulfate.

6. A vitamin B12 solid fertilizer for promoting healthy plant development according to claim 5, characterized in that: The trace element is at least one of iron, zinc and manganese.

7. A vitamin B12 solid fertilizer for promoting healthy plant development according to claim 1, characterized in that: The adsorbent is modified kaolin, wherein the modified kaolin is kaolin, GO graphene, and chitosan uniformly mixed in a mass ratio of (10-20):(1-3):(2-5).

8. A vitamin B12 solid fertilizer for promoting healthy plant development according to claim 1, characterized in that: The binder is a mixture of sodium carboxymethyl cellulose and polyvinyl alcohol in a mass ratio of (1-3):

1.

9. A method for preparing a vitamin B12 solid fertilizer for promoting healthy plant development as claimed in any one of claims 1 to 8, characterized in that: The preparation method comprises: Pretreatment of raw materials; Slowly dripping the trace element aqueous solution into the pretreated raw material, stirring at 200-400 rpm for 10-15 minutes to ensure uniform distribution of the trace elements; premixing vitamin B12 with modified kaolin, then adding to the above materials, stirring at 250-450 rpm for 10-15 minutes; adding the composite synergist to the materials, stirring at 300-500 rpm for 10-15 minutes; adding the mixed binder to the materials, stirring at 200-350 rpm for 5-10 minutes; The evenly mixed material is sent to an extrusion granulator for granulation, and the granulated fertilizer particles are sent to a low-temperature vacuum drying device, dried for 3-5 hours at 50-70°C and a vacuum degree of -0.08-0.1MPa, and then sieved through a vibrating screen to remove particles with particle sizes that do not meet the requirements, and the qualified fertilizer particles are sealed and packaged to obtain vitamin B12 solid fertilizer that promotes the healthy development of plants.

10. The method for preparing a vitamin B12 solid fertilizer for promoting healthy plant development according to claim 9, characterized in that: The pretreatment comprises: using mechanical pulverizing equipment to pulverize nitrogen source, phosphorus source and potassium source to 100-200 meshes respectively, accurately weighing trace elements, preparing uniform aqueous solution, and sequentially preparing modified kaolin, composite synergist and binder.

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