Fertilizer for plant growth and preparation method thereof

Abstract

The invention relates to the technical field of fertilizers, in particular to a fertilizer for plant growth and a preparation method thereof, and the fertilizer is prepared from the following components in parts by weight: 20-60 parts of tylosin mushroom dregs; 10 to 40 parts of straw; 5 to 30 parts of livestock and poultry manure; 1 to 20 parts of calcium superphosphate; 1-10 parts of potassium sulfate; and 1-20 parts of modified humic acid. According to the prepared plant growth fertilizer and the preparation method thereof, the activity and water solubility of the fertilizer are improved by means of modifying humic acid, culturing white-rot fungi, adding carbon nanotubes and montmorillonite and the like, and the adsorption and desorption capability of the fertilizer on soil nutrients is enhanced; meanwhile, the raw materials such as the tylosin residues, the straw and the livestock and poultry manure are used for promoting the flourishing of soil microbial communities and continuously improving the soil fertility, so that the problems of insufficient nutrient content, slow release, low pertinence and the like of organic fertilizers and biological fertilizers in related technologies are solved.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizers, and in particular to a fertilizer for plant growth and a preparation method thereof. Background Art

[0002] In modern agricultural production, fertilizer plays a vital role in the growth and development of plants. Although traditional chemical fertilizers can provide a large amount of nutrients to plants in the short term and promote plant growth, long-term and large-scale use will lead to problems such as soil compaction, acidification, and salinization, destroying the soil ecological environment, reducing soil fertility, and thus affecting the yield and quality of crops. At the same time, the production process of chemical fertilizers often consumes a lot of energy and resources, and causes certain pollution to the environment.

[0003] In order to overcome the drawbacks of traditional chemical fertilizers, organic fertilizers and biofertilizers have received widespread attention in recent years. However, some existing organic fertilizers and biofertilizers have problems such as insufficient nutrient content, slow fertilizer release, and lack of targeting, making it difficult to meet the diverse nutrient needs of different plants at different growth stages. Summary of the invention

[0004] The present application provides a fertilizer for plant growth and a preparation method thereof, so as to solve the problems of insufficient nutrient content, slow release and lack of specificity of organic fertilizers and biological fertilizers in related technologies.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is as follows: The present invention provides a fertilizer for plant growth, which is composed of the following components by weight: Tylosin residue: 20-60 parts; Straw: 10-40 parts; Livestock and poultry manure: 5-30 portions; Superphosphate: 1-20 parts; Potassium sulfate: 1-10 parts; Modified humic acid: 1-20 parts.

[0006] Furthermore, the fertilizer consists of the following components by weight: Tylosin residue: 30-50 parts; Straw: 20-30 parts; Livestock and poultry manure: 10-20 portions; Superphosphate: 5-10 parts; Potassium sulfate: 3-8 parts; Modified humic acid: 5-10 parts.

[0007] Furthermore, the modified humic acid consists of the following components in parts by weight: White rot fungi: 35-45 parts; Humic acid: 60-70 parts; Carbon nanotubes: 30-35 parts; Montmorillonite: 15-25 parts.

[0008] Furthermore, the preparation process of the modified humic acid includes inoculating white rot fungi into a culture medium containing humic acid for cultivation, and then mixing with carbon nanotubes and montmorillonite, and stirring at a speed of 800-1200 rpm for 20-30 minutes.

[0009] Furthermore, the humic acid concentration in the culture medium is 10%-20%, the pH value is adjusted to 4.5-5.5, and the culture is carried out for 7-10 days at 25-30° C. and under good ventilation conditions.

[0010] Furthermore, the tylosin residue is pretreated to remove residual antibiotics and impurities, the straw is crushed, and the livestock and poultry manure is composted.

[0011] Furthermore, the pretreatment of the tylosin residue includes one or more of high temperature and high pressure cooking, drying, crushing, chemical oxidation and biodegradation.

[0012] Furthermore, the livestock manure is one or more of pig manure, cow manure, sheep manure, chicken manure and duck manure.

[0013] The present invention also provides a method for preparing a fertilizer for plant growth, comprising the following steps: Step 1: pretreating tylosin residue; Step 2: preparing modified humic acid; Step 3: adding the pretreated tylosin residue, modified humic acid and other raw materials into a mixer, controlling the stirring speed at 300-500 revolutions per minute, stirring time for 40-60 minutes, and then sequentially performing granulation treatment and low-temperature drying to obtain fertilizer for plant growth.

[0014] Furthermore, the granulation diameter is 2-5 mm, and the low temperature is 40-60°C.

[0015] The beneficial effects achieved by adopting the above-mentioned present invention are as follows: 1. The present invention prepares a fertilizer for plant growth, and prepares modified humic acid, wherein the humic acid component has a large number of functional groups such as carboxyl and phenolic hydroxyl groups, which can undergo ion exchange reactions with nutrient ions in the soil. Specifically, after the carboxyl groups of humic acid are deprotonated to form carboxylates, they combine with free calcium ions in the soil to achieve adsorption and fixation of calcium ions, while releasing other nutrient ions originally combined with calcium ions, such as ammonium ions, to increase the concentration of effective nutrients in the soil. When the ammonium ion concentration around the plant roots decreases, the ammonium ions adsorbed on the humic acid can be desorbed for absorption and utilization by the plants; 2. Secondly, when white rot fungi are inoculated into humic acid-containing culture medium, they use humic acid as a carbon and nitrogen source and secrete a variety of extracellular enzymes, such as lignin degradation enzymes and cellulases. These enzymes act on the molecular structure of humic acid, breaking its original relatively stable chemical chain, exposing more active sites of humic acid molecules, thereby increasing its activity and water solubility. At the same time, humic acid provides growth matrix and nutrition for white rot fungi; 3. Carbon nanotubes and montmorillonite are added. Carbon nanotubes have strong adsorption capacity due to their unique nanostructure and large specific surface area. They can adsorb nutrient ions in soil solution to form the so-called "secondary adsorption". When the concentration of nutrient ions in the soil solution decreases, the nutrient ions adsorbed on the carbon nanotubes and humic acid will be desorbed and released, maintaining the dynamic balance of nutrients in the soil solution and meeting the needs of plant roots to continuously absorb nutrients; montmorillonite has a layered or flaky structure, which can expand rapidly after absorbing water and form a "sponge"-like structure in the soil. On the one hand, it directly absorbs moisture in the soil, and on the other hand, its surface carries a negative charge and can adsorb nutrient ions in cationic form, such as ammonium ions and potassium ions. These nutrient ions are adsorbed and fixed on the surface of montmorillonite to form a stable complex. Moreover, due to the presence of humic acid and carbon nanotubes, they can react chemically with the surface of montmorillonite to adjust the rate and degree of adsorption and desorption of nutrient ions by montmorillonite, so that it can accurately provide the required water and nutrients to plants according to the different growth stages of plants, and optimize the soil microenvironment for plant growth; 4. In the process of composting or pretreatment of raw materials such as tylosin residue, straw, and livestock and poultry manure in the present invention, organic macromolecules such as cellulose and protein are gradually decomposed into small molecular sugars, amino acids, etc. under the action of microorganisms. These small molecular substances can not only be directly absorbed and utilized by plant roots, but also provide rich "food" for microorganisms in the soil, promote the prosperity of soil microbial communities, and microorganisms further participate in the material cycle and energy conversion in the soil, continuously improve the soil fertility, and continuously provide power for plant growth; 5. The present invention provides a method for preparing fertilizer for plant growth. The preparation method is simple, low-cost, and can be put into production and used in large quantities. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 This is a scanning electron microscope image of modified humic acid provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is described below through specific examples. It should be understood that the one or more method steps mentioned in the present invention do not exclude the existence of other method steps before and after the combination step or the insertion of other method steps between these explicitly mentioned steps; it should also be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or to limit the scope of the present invention. The change or adjustment of the relative relationship thereof shall also be regarded as the scope of the present invention without substantially changing the technical content.

[0018] In order to better understand the above technical scheme, the exemplary embodiments of the present invention are described in more detail below. Although 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 in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0019] The present invention will be further described below in conjunction with the following examples.

[0020] Example 1 The present invention provides a fertilizer for plant growth, the fertilizer comprising the following raw materials in the following mass proportions: Tylosin residue: 30 parts; Straw: 20 parts; Livestock and poultry manure: 10 parts; Superphosphate: 5 parts; Potassium sulfate: 3 parts; Modified humic acid: 5 parts.

[0021] In the embodiments of the present application, Figure 1 As shown, the modified humic acid consists of the following components by weight: White rot fungi: 35 copies; Humic acid: 60 parts; Carbon nanotubes: 30 parts; Montmorillonite: 15 parts.

[0022] In the embodiment of the present application, the preparation process of modified humic acid includes inoculating white rot fungi into a culture medium containing humic acid, and then mixing and stirring with carbon nanotubes and montmorillonite at a speed of 800-1200 rpm for 20-30 minutes.

[0023] In the examples of the present application, the humic acid concentration in the culture medium is 10%-20%, the pH value is adjusted to 4.5-5.5, and the culture is carried out at 25-30° C. and under well-ventilated conditions for 7-10 days.

[0024] In the embodiment of the present application, the tylosin residue is pretreated to remove residual antibiotics and impurities, the straw is crushed, and the livestock and poultry manure is composted.

[0025] In the embodiments of the present application, the pretreatment of tylosin residue includes one or more of high temperature and high pressure cooking, drying, crushing, chemical oxidation and biodegradation.

[0026] In the embodiment of the present application, the livestock manure is one or more of pig manure, cow manure, sheep manure, chicken manure, and duck manure.

[0027] The present invention also provides a method for preparing a fertilizer for plant growth, comprising the following steps: Step 1: pretreating tylosin residue; Step 2: preparing modified humic acid; Step 3: adding the pretreated tylosin residue, modified humic acid and other raw materials into a mixer, controlling the stirring speed at 300-500 revolutions per minute, stirring time for 40-60 minutes, and then sequentially performing granulation treatment and low-temperature drying to obtain fertilizer for plant growth.

[0028] In the embodiment of the present application, the granulation diameter is 2-5 mm and the low temperature is 40-60°C.

[0029] Example 2 The present invention provides a fertilizer for plant growth, the fertilizer comprising the following raw materials in the following mass proportions: Tylosin residue: 35 parts; Straw: 22 parts; Livestock and poultry manure: 12 parts; Superphosphate: 6 parts; Potassium sulfate: 4 parts; Modified humic acid: 6 parts.

[0030] In the examples of the present application, the modified humic acid is composed of the following components by weight: White rot fungi: 37 copies; Humic acid: 62 parts; Carbon nanotubes: 31 parts; Montmorillonite: 17 parts.

[0031] In the embodiment of the present application, the preparation process of modified humic acid includes inoculating white rot fungi into a culture medium containing humic acid, and then mixing and stirring with carbon nanotubes and montmorillonite at a speed of 800-1200 rpm for 20-30 minutes.

[0032] In the examples of the present application, the humic acid concentration in the culture medium is 10%-20%, the pH value is adjusted to 4.5-5.5, and the culture is carried out at 25-30° C. and under well-ventilated conditions for 7-10 days.

[0033] In the embodiment of the present application, the tylosin residue is pretreated to remove residual antibiotics and impurities, the straw is crushed, and the livestock and poultry manure is composted.

[0034] In the embodiments of the present application, the pretreatment of tylosin residue includes one or more of high temperature and high pressure cooking, drying, crushing, chemical oxidation and biodegradation.

[0035] In the embodiment of the present application, the livestock manure is one or more of pig manure, cow manure, sheep manure, chicken manure, and duck manure.

[0036] The present invention also provides a method for preparing a fertilizer for plant growth, comprising the following steps: Step 1: pretreating tylosin residue; Step 2: preparing modified humic acid; Step 3: adding the pretreated tylosin residue, modified humic acid and other raw materials into a mixer, controlling the stirring speed at 300-500 revolutions per minute, stirring time for 40-60 minutes, and then sequentially performing granulation treatment and low-temperature drying to obtain fertilizer for plant growth.

[0037] In the embodiment of the present application, the granulation diameter is 2-5 mm and the low temperature is 40-60°C.

[0038] Example 3 The present invention provides a fertilizer for plant growth, the fertilizer comprising the following raw materials in the following mass proportions: Tylosin residue: 40 parts; Straw: 24 parts; Livestock and poultry manure: 14 parts; Superphosphate: 7 parts; Potassium sulfate: 5 parts; Modified humic acid: 7 parts.

[0039] In the examples of the present application, the modified humic acid is composed of the following components by weight: White rot fungi: 39; Humic acid: 64 parts; Carbon nanotubes: 32 parts; Montmorillonite: 19 parts.

[0040] In the embodiment of the present application, the preparation process of modified humic acid includes inoculating white rot fungi into a culture medium containing humic acid, and then mixing and stirring with carbon nanotubes and montmorillonite at a speed of 800-1200 rpm for 20-30 minutes.

[0041] In the examples of the present application, the humic acid concentration in the culture medium is 10%-20%, the pH value is adjusted to 4.5-5.5, and the culture is carried out at 25-30° C. and under well-ventilated conditions for 7-10 days.

[0042] In the embodiment of the present application, the tylosin residue is pretreated to remove residual antibiotics and impurities, the straw is crushed, and the livestock and poultry manure is composted.

[0043] In the embodiments of the present application, the pretreatment of tylosin residue includes one or more of high temperature and high pressure cooking, drying, crushing, chemical oxidation and biodegradation.

[0044] In the embodiment of the present application, the livestock manure is one or more of pig manure, cow manure, sheep manure, chicken manure, and duck manure.

[0045] The present invention also provides a method for preparing a fertilizer for plant growth, comprising the following steps: Step 1: pretreating tylosin residue; Step 2: preparing modified humic acid; Step 3: adding the pretreated tylosin residue, modified humic acid and other raw materials into a mixer, controlling the stirring speed at 300-500 revolutions per minute, stirring time for 40-60 minutes, and then sequentially performing granulation treatment and low-temperature drying to obtain fertilizer for plant growth.

[0046] In the embodiment of the present application, the granulation diameter is 2-5 mm and the low temperature is 40-60°C.

[0047] Example 4 The present invention provides a fertilizer for plant growth, the fertilizer comprising the following raw materials in the following mass proportions: Tylosin residue: 45 parts; Straw: 27 parts; Livestock and poultry manure: 17 parts; Superphosphate: 8 parts; Potassium sulfate: 6 parts; Modified humic acid: 8 parts.

[0048] In the examples of the present application, the modified humic acid is composed of the following components by weight: White rot fungi: 41; Humic acid: 68 parts; Carbon nanotubes: 34 parts; Montmorillonite: 23 parts.

[0049] In the embodiment of the present application, the preparation process of modified humic acid includes inoculating white rot fungi into a culture medium containing humic acid, and then mixing and stirring with carbon nanotubes and montmorillonite at a speed of 800-1200 rpm for 20-30 minutes.

[0050] In the examples of the present application, the humic acid concentration in the culture medium is 10%-20%, the pH value is adjusted to 4.5-5.5, and the culture is carried out at 25-30° C. and under well-ventilated conditions for 7-10 days.

[0051] In the embodiment of the present application, the tylosin residue is pretreated to remove residual antibiotics and impurities, the straw is crushed, and the livestock and poultry manure is composted.

[0052] In the embodiments of the present application, the pretreatment of tylosin residue includes one or more of high temperature and high pressure cooking, drying, crushing, chemical oxidation and biodegradation.

[0053] In the embodiment of the present application, the livestock manure is one or more of pig manure, cow manure, sheep manure, chicken manure, and duck manure.

[0054] The present invention also provides a method for preparing a fertilizer for plant growth, comprising the following steps: Step 1: pretreating tylosin residue; Step 2: preparing modified humic acid; Step 3: adding the pretreated tylosin residue, modified humic acid and other raw materials into a mixer, controlling the stirring speed at 300-500 revolutions per minute, stirring time for 40-60 minutes, and then sequentially performing granulation treatment and low-temperature drying to obtain fertilizer for plant growth.

[0055] In the embodiment of the present application, the granulation diameter is 2-5 mm and the low temperature is 40-60°C.

[0056] Example 5 The present invention provides a fertilizer for plant growth, the fertilizer comprising the following raw materials in the following mass proportions: Tylosin residue: 50 parts; Straw: 30 parts; Livestock and poultry manure: 20 parts; Superphosphate: 10 parts; Potassium sulfate: 8 parts; Modified humic acid: 10 parts.

[0057] In the examples of the present application, the modified humic acid is composed of the following components by weight: White rot fungi: 45; Humic acid: 70 parts; Carbon nanotubes: 35 parts; Montmorillonite: 25 parts.

[0058] In the embodiment of the present application, the preparation process of modified humic acid includes inoculating white rot fungi into a culture medium containing humic acid, and then mixing and stirring with carbon nanotubes and montmorillonite at a speed of 800-1200 rpm for 20-30 minutes.

[0059] In the examples of the present application, the humic acid concentration in the culture medium is 10%-20%, the pH value is adjusted to 4.5-5.5, and the culture is carried out at 25-30° C. and under well-ventilated conditions for 7-10 days.

[0060] In the embodiment of the present application, the tylosin residue is pretreated to remove residual antibiotics and impurities, the straw is crushed, and the livestock and poultry manure is composted.

[0061] In the embodiments of the present application, the pretreatment of tylosin residue includes one or more of high temperature and high pressure cooking, drying, crushing, chemical oxidation and biodegradation.

[0062] In the embodiment of the present application, the livestock manure is one or more of pig manure, cow manure, sheep manure, chicken manure, and duck manure.

[0063] The present invention also provides a method for preparing a fertilizer for plant growth, comprising the following steps: Step 1: pretreating tylosin residue; Step 2: preparing modified humic acid; Step 3: adding the pretreated tylosin residue, modified humic acid and other raw materials into a mixer, controlling the stirring speed at 300-500 revolutions per minute, stirring time for 40-60 minutes, and then sequentially performing granulation treatment and low-temperature drying to obtain fertilizer for plant growth.

[0064] In the embodiment of the present application, the granulation diameter is 2-5 mm and the low temperature is 40-60°C.

[0065] Comparative Example 1 A fertilizer for plant growth, which differs from Example 1 only in that the components do not contain white rot fungi, and the reduced amount of white rot fungi is distributed to humic acid. The remaining components, component contents, and preparation methods are the same as those of Example 1.

[0066] Comparative Example 2 A fertilizer for plant growth, which differs from Example 1 only in that the components do not contain carbon nanotubes and montmorillonite, and the reduced amount of carbon nanotubes and montmorillonite is distributed to humic acid. The remaining components, component contents, and preparation methods are the same as those of Example 1.

[0067] Comparative Example 3 A fertilizer for plant growth, which differs from Example 1 only in that the components do not contain white rot fungi, carbon nanotubes and montmorillonite, and the reduced amounts of white rot fungi, carbon nanotubes and montmorillonite are distributed to humic acid, and the remaining components, component contents and preparation methods are the same as those of Example 1.

[0068] Performance Testing 10 g of the fertilizers prepared in Examples 1-5 and Comparative Examples 1-3 were weighed, placed in a conical flask containing 200 ml of simulated soil solution, and oscillated in a constant temperature oscillator (25°C, 150 rpm). 5 ml of the solution was taken at regular intervals, and the concentration of the main nutrient ions in the solution was determined by ion chromatography.

[0069] Example 1: On the first day, the ammonium nitrogen release concentration was 23 mg / L, nitrate nitrogen was 16 mg / L, phosphorus was 4 mg / L, and potassium was 6 mg / L; on the seventh day, the ammonium nitrogen concentration was maintained at 15 mg / L, nitrate nitrogen rose to 21 mg / L, phosphorus was 4 mg / L, and potassium was 5 mg / L; on the 21st day, the ammonium nitrogen was still 8 mg / L, nitrate nitrogen was 12 mg / L, phosphorus was 2 mg / L, and potassium was 3 mg / L.

[0070] Embodiment 2: on the 1st day, ammonium nitrogen release concentration was 24 mg / L, nitrate nitrogen was 17 mg / L, phosphorus was 5 mg / L, and potassium was 7 mg / L; on the 7th day, ammonium nitrogen was 16 mg / L, nitrate nitrogen was 22 mg / L, phosphorus was 5 mg / L, and potassium was 6 mg / L; on the 21st day, ammonium nitrogen was 9 mg / L, nitrate nitrogen was 13 mg / L, phosphorus was 2 mg / L, and potassium was 3 mg / L.

[0071] Embodiment 3: start the 1st day, ammonium nitrogen 25 milligrams per liter, nitrate nitrogen 19 milligrams per liter, phosphorus 6 milligrams per liter, potassium 8 milligrams per liter; the 7th day, ammonium nitrogen 17 milligrams per liter, nitrate nitrogen 23 milligrams per liter, phosphorus 6 milligrams per liter, potassium 7 milligrams per liter; the 21st day, ammonium nitrogen 10 milligrams per liter, nitrate nitrogen 14 milligrams per liter, phosphorus 3 milligrams per liter, potassium 4 milligrams per liter.

[0072] Embodiment 4: on the 1st day, ammonium nitrogen 26 milligrams per liter, nitrate nitrogen 20 milligrams per liter, phosphorus 7 milligrams per liter, potassium 9 milligrams per liter; on the 7th day, ammonium nitrogen 19 milligrams per liter, nitrate nitrogen 24 milligrams per liter, phosphorus 7 milligrams per liter, potassium 8 milligrams per liter; on the 21st day, ammonium nitrogen 11 milligrams per liter, nitrate nitrogen 15 milligrams per liter, phosphorus 3 milligrams per liter, potassium 4 milligrams per liter.

[0073] Embodiment 5: initially on the 1st day, ammonium nitrogen was 24 milligrams per liter, nitrate nitrogen was 18 milligrams per liter, phosphorus was 5 milligrams per liter, and potassium was 8 milligrams per liter; on the 7th day, ammonium nitrogen was 18 milligrams per liter, nitrate nitrogen was 23 milligrams per liter, phosphorus was 5 milligrams per liter, and potassium was 7 milligrams per liter; on the 21st day, ammonium nitrogen was 10 milligrams per liter, nitrate nitrogen was 14 milligrams per liter, phosphorus was 2 milligrams per liter, and potassium was 3 milligrams per liter.

[0074] Comparative Example 1: Due to the absence of white rot fungi, on the first day, the concentration of ammonium nitrogen released was only 18 mg / L, nitrate nitrogen was 12 mg / L, and potassium was 6 mg / L; subsequently, as time passed, the nutrient release rate slowed down, and on the 21st day, the ammonium nitrogen was 3 mg / L, nitrate nitrogen was 5 mg / L, phosphorus was 1 mg / L, and potassium was 2 mg / L.

[0075] Comparative Example 2: lacking carbon nanotubes and montmorillonite, on the first day, the release concentration of ammonium nitrogen was 20 mg / L, nitrate nitrogen was 14 mg / L, phosphorus was 4 mg / L, and potassium was 7 mg / L; on the 21st day, the release concentration of ammonium nitrogen was 4 mg / L, nitrate nitrogen was 6 mg / L, phosphorus was 1 mg / L, and potassium was 2 mg / L.

[0076] Comparative Example 3: Due to the lack of white rot fungi, carbon nanotubes and montmorillonite, on the first day, the ammonium nitrogen was 16 mg / L, the nitrate nitrogen was 10 mg / L, the phosphorus was 3 mg / L, and the potassium was 6 mg / L; on the 21st day, the ammonium nitrogen was 2 mg / L, the nitrate nitrogen was 4 mg / L, the phosphorus was 1 mg / L, and the potassium was 2 mg / L.

[0077] Soil water and fertilizer retention performance: Example 1: On the first day after watering, the soil moisture retention rate reached 83%, the ammonium nitrogen content in the leachate was 0.4 mg / L, the nitrate nitrogen content was 0.2 mg / L, and the phosphorus content was 0.1 mg / L; on the 10th day, the soil moisture retention rate was still 70%, the ammonium nitrogen content in the leachate was 0.2 mg / L, the nitrate nitrogen content was 0.1 mg / L, and the phosphorus content was 0.05 mg / L.

[0078] Example 2: On the first day after watering, the soil moisture retention rate was 84%, and the leachate contained 0.5 mg / L of ammonium nitrogen, 0.25 mg / L of nitrate nitrogen, and 0.1 mg / L of phosphorus; on the tenth day, the soil moisture retention rate was 68%, and the leachate contained 0.2 mg / L of ammonium nitrogen, 0.1 mg / L of nitrate nitrogen, and 0.05 mg / L of phosphorus.

[0079] Example 3: On the first day after watering, the soil moisture retention rate was 85%, and the ammonium nitrogen in the leachate was 0.6 mg / L, the nitrate nitrogen in the leachate was 0.3 mg / L, and the phosphorus in the leachate was 0.1 mg / L; on the 10th day, the soil moisture retention rate was 70%, and the ammonium nitrogen in the leachate was 0.2 mg / L, the nitrate nitrogen in the leachate was 0.1 mg / L, and the phosphorus in the leachate was 0.05 mg / L.

[0080] Example 4: On the first day after watering, the soil moisture retention rate was 86%, and the ammonium nitrogen in the leachate was 0.7 mg / L, the nitrate nitrogen in the leachate was 0.4 mg / L, and the phosphorus in the leachate was 0.1 mg / L; on the 10th day, the soil moisture retention rate was 69%, and the ammonium nitrogen in the leachate was 0.2 mg / L, the nitrate nitrogen in the leachate was 0.1 mg / L, and the phosphorus in the leachate was 0.05 mg / L.

[0081] Example 5: On the first day after watering, the soil moisture retention rate was 85%, and the leachate contained 0.6 mg / L of ammonium nitrogen, 0.3 mg / L of nitrate nitrogen, and 0.1 mg / L of phosphorus; on the tenth day, the soil moisture retention rate was 71%, and the leachate contained 0.2 mg / L of ammonium nitrogen, 0.1 mg / L of nitrate nitrogen, and 0.05 mg / L of phosphorus.

[0082] Comparative Example 1: On the first day after watering, the soil moisture retention rate was 80%, and the ammonium nitrogen in the leachate was 0.8 mg / L, the nitrate nitrogen in the leachate was 0.5 mg / L, and the phosphorus in the leachate was 0.2 mg / L; on the tenth day, the soil moisture retention rate was 60%, and the ammonium nitrogen in the leachate was 0.2 mg / L, the nitrate nitrogen in the leachate was 0.1 mg / L, and the phosphorus in the leachate was 0.05 mg / L.

[0083] Comparative Example 2: On the first day after watering, the soil moisture retention rate was 78%, and the ammonium nitrogen in the leachate was 1 mg / L, the nitrate nitrogen was 0.6 mg / L, and the phosphorus was 0.2 mg / L; on the 10th day, the soil moisture retention rate was 55%, and the ammonium nitrogen in the leachate was 1.0 mg / L, the nitrate nitrogen was 0.1 mg / L, and the phosphorus was 0.05 mg / L.

[0084] Comparative Example 3: On the first day after watering, the soil moisture retention rate was 75%, and the ammonium nitrogen in the leachate was 1.2 mg / L, the nitrate nitrogen in the leachate was 0.7 mg / L, and the phosphorus in the leachate was 0.2 mg / L; on the tenth day, the soil moisture retention rate was 50%, and the ammonium nitrogen in the leachate was 1.2 mg / L, the nitrate nitrogen in the leachate was 0.1 mg / L, and the phosphorus in the leachate was 0.05 mg / L.

[0085] Plant growth promoting effect: Example 1: On the 30th day after sowing, the average plant height of Chinese cabbage reached 22 cm, the stem thickness was 0.35 cm, the number of leaves was 10, and the fresh weight was 12 g per plant.

[0086] Example 2: On the 30th day after sowing, the average plant height of Chinese cabbage was 23 cm, the stem thickness was 0.38 cm, the number of leaves was 11, and the fresh weight was 13 g per plant.

[0087] Example 3: On the 30th day after sowing, the average plant height of Chinese cabbage was 24 cm, the stem thickness was 0.40 cm, the number of leaves was 12, and the fresh weight was 14 g per plant.

[0088] Example 4: On the 30th day after sowing, the average plant height of Chinese cabbage was 25 cm, the stem thickness was 0.42 cm, the number of leaves was 13, and the fresh weight was 15 g per plant.

[0089] Example 5: On the 30th day after sowing, the average plant height of Chinese cabbage was 24 cm, the stem thickness was 0.4 cm, the number of leaves was 12, and the fresh weight was 15 g per plant.

[0090] Comparative Example 1: On the 30th day after sowing, the average plant height of Chinese cabbage was 19 cm, the stem thickness was 0.33 cm, the number of leaves was 9, and the fresh weight was 9 g per plant.

[0091] Comparative Example 2: On the 30th day after sowing, the average plant height of Chinese cabbage was 18 cm, the stem thickness was 0.32 cm, the number of leaves was 8, and the fresh weight was 8 g per plant.

[0092] Comparative Example 3: On the 30th day after sowing, the average plant height of Chinese cabbage was 15 cm, the stem thickness was 0.2 cm, the number of leaves was 6, and the fresh weight was 5 g per plant.

[0093] In summary, in terms of nutrient release characteristics, the embodiments can quickly release considerable concentrations of nutrient ions such as ammonium nitrogen, nitrate nitrogen, phosphorus and potassium in the initial stage, providing sufficient nutrition for the initial stage of plant growth. As time progresses to the 7th day and the 21st day, although the release rate of each nutrient changes, it can always maintain a certain effective concentration, showing a good slow-release effect, ensuring that the nutrient needs of the plant throughout the growth process are continuously met. In contrast, taking the comparative example 1 lacking white rot fungi as an example, the concentration of each nutrient released on the first day is significantly lower than that of the embodiment, and the subsequent nutrient release decays rapidly. By the 21st day, the ammonium nitrogen is only 3 mg per liter, which is difficult to support the vigorous growth of the plant in the later stage.

[0094] In terms of soil water and fertilizer retention performance, the soil moisture retention rate can generally reach 83%-86% on the first day after watering, and the nutrient content in the leaching solution is extremely low. For example, the leaching solution of Example 4 contains 0.7 mg / L of ammonium nitrogen, 0.4 mg / L of nitrate nitrogen, and 0.1 mg / L of phosphorus, indicating that fertilizer can help the soil lock water efficiently, while firmly absorbing nutrients and reducing loss and waste. Comparative Examples 1-3 are in sharp contrast. For example, the soil moisture retention rate of Comparative Example 3 is only 75% on the first day, and the nutrient content in the leaching solution is high. By the 10th day, the soil moisture is seriously lost, and the water and fertilizer retention capacity is far less than that of the embodiment, and it is impossible to create a stable and lasting soil microenvironment for plants.

[0095] From the perspective of plant growth promotion effect, on the 30th day after sowing, the height of the Chinese cabbage was 22-25 cm, the stem diameter was 0.35-0.42 cm, the number of leaves was 10-13, and the fresh weight was 12-15 grams per plant, and each growth index far exceeded the comparative example. Due to the lack of key components, the comprehensive performance of the fertilizer in comparative examples 1-3 was poor, resulting in slow growth and stunted development of the Chinese cabbage. For example, the height of comparative example 3 was only 15 cm, the stem diameter was 0.2 cm, the number of leaves was 6, and the fresh weight was 5 grams per plant, which was significantly different from the embodiment.

[0096] The present invention provides a fertilizer for plant growth and a preparation method thereof, wherein humic acid is modified to enhance its exchange capacity with soil nutrients, the secretion enzyme of white rot fungi is used to improve the activity and water solubility of humic acid, and carbon nanotubes and montmorillonite are added to adjust the dynamic balance of soil nutrients and water management. At the same time, organic wastes such as tylosin residue, straw, and livestock and poultry manure are used as raw materials, and small molecule nutrients are provided after microbial decomposition, promoting the prosperity of soil microbial communities, thereby continuously improving soil fertility. Thus, the problems of insufficient nutrient content, slow release, and poor pertinence of organic fertilizers and biological fertilizers in the related art are solved.

[0097] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fertilizer for plant growth, characterized in that: The fertilizer is composed of the following components by weight: Tylosin residue: 20-60 parts; Straw: 10-40 parts; Livestock and poultry manure: 5-30 portions; Superphosphate: 1-20 parts; Potassium sulfate: 1-10 parts; Modified humic acid: 1-20 parts.

2. A fertilizer for plant growth according to claim 1, characterized in that: The fertilizer is composed of the following components by weight: Tylosin residue: 30-50 parts; Straw: 20-30 parts; Livestock and poultry manure: 10-20 portions; Superphosphate: 5-10 parts; Potassium sulfate: 3-8 parts; Modified humic acid: 5-10 parts.

3. A fertilizer for plant growth according to claim 2, characterized in that: The modified humic acid is composed of the following components by weight: White rot fungi: 35-45 parts; Humic acid: 60-70 parts; Carbon nanotubes: 30-35 parts; Montmorillonite: 15-25 parts.

4. A fertilizer for plant growth according to claim 3, characterized in that: The preparation process of the modified humic acid comprises inoculating white rot fungi into a culture medium containing humic acid for cultivation, and then mixing and stirring with carbon nanotubes and montmorillonite at a speed of 800-1200 rpm for 20-30 minutes.

5. A fertilizer for plant growth according to claim 4, characterized in that: The humic acid concentration in the culture medium is 10%-20%, the pH value is adjusted to 4.5-5.5, and the culture is carried out for 7-10 days at 25-30° C. and under good ventilation conditions.

6. A fertilizer for plant growth according to claim 1, characterized in that: The tylosin residue is pretreated to remove residual antibiotics and impurities, the straw is crushed, and the livestock and poultry manure is composted.

7. A fertilizer for plant growth according to claim 5, characterized in that: The pretreatment of the tylosin residue includes one or more of high temperature and high pressure cooking, drying, crushing, chemical oxidation and biodegradation.

8. A fertilizer for plant growth according to claim 1, characterized in that: The livestock manure is one or more of pig manure, cow manure, sheep manure, chicken manure and duck manure.

9. A fertilizer for plant growth according to claim 1, characterized in that: The preparation method comprises the following steps: Step 1: pre-treating the tylosin residue; Step 2: preparing modified humic acid; Step 3: adding the pretreated tylosin residue, modified humic acid and other raw materials into a mixer, controlling the stirring speed at 300-500 rpm for 40-60 minutes, and then sequentially performing granulation and low-temperature drying to obtain fertilizer for plant growth.

10. The method for preparing a fertilizer for plant growth according to claim 9, characterized in that: The granulation diameter is 2-5 mm, and the low temperature is 40-60°C.

Images