Plant nutrition blending liquid fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of agricultural fertilizers, in particular to a plant nutrition blending liquid fertilizer and a preparation method thereof, and aims to solve the problems that nutrient supply and crop growth period requirements are not matched, the chelating rate of medium trace elements is low, the product stability is poor (layering is easy to occur after standing), the soil adaptability is weak (the pH and fertility of soil cannot be adjusted) and the like in a traditional liquid fertilizer. A basic mother solution in the liquid fertilizer takes IDHA as a chelating agent (the chelating rate is greater than or equal to 90%), and is compounded with a biomass charcoal extract (prepared from wheat straws) and a COemulsion (the carbon release period is 11-15 days), so that basic nutrition and an environment adaptation basis are provided for crops; the growth period targeting sub-agent is customized according to key growth period requirements of different crops; the function strengthening module realizes disease resistance, photosynthesis, quality improvement and the like, and the finally prepared product is suitable for various crops such as corn, rice, azalea, camellia oleifera and wheat and has a wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of agricultural fertilizer, in particular to a plant nutrition blending liquid fertilizer and a preparation method thereof. BACKGROUND

[0002] With the development of agricultural modernization, liquid fertilizer has been widely used in agricultural production due to its advantages of fast absorption, high utilization rate, and convenient application. However, the existing liquid fertilizer has many deficiencies: single amino acid liquid fertilizer has weak targeting, trace elements are easily fixed by soil, and nutrient synergies are poor; traditional trace element fertilizers are mostly in the form of inorganic salts, with low plant absorption and utilization rate, and are prone to antagonistic reactions with other nutrients; at the same time, liquid fertilizer is prone to stratification, precipitation and other stability problems during storage and application, affecting the fertilizer efficiency.

[0003] Amino acids, as a nitrogen source that can be directly absorbed by plants, have chelating function and can form stable chelates with trace elements to promote the absorption and utilization of trace elements. In addition, insufficient carbon source supply will limit the efficiency of plant photosynthesis, and trace elements are essential for the construction of plant antioxidant enzyme system and defense mechanism to improve plant stress resistance.

[0004] Therefore, according to the related technology in the above, it is urgent to develop a plant nutrition blending liquid fertilizer and a preparation method thereof. SUMMARY

[0005] Therefore, the present application aims to provide a plant nutrition blending liquid fertilizer and a preparation method thereof to solve the problem that single amino acid functional liquid fertilizer or single trace element liquid fertilizer cannot meet the nutritional needs of the whole growth period and soil improvement, disease resistance, and other needs in the prior art.

[0006] Based on the above purpose, the present application provides a plant nutrition blending liquid fertilizer and a preparation method thereof.

[0007] A plant nutrition blending liquid fertilizer, comprising the following mass parts of raw materials: 60-85 parts of a basic mother liquor, 10-25 parts of a growth period targeted sub-agent, and 5-15 parts of a functional strengthening module.

[0008] Preferably, the basic mother liquor is prepared from amino acid stock solution, IDHA chelated trace elements, biomass charcoal extract, carbon dioxide emulsion, and water in a mass ratio of 10-20:5-10:8-15:5-10:45-70.

[0009] Preferably, the growth period targeted sub-agent is prepared from the basic mother liquor, amino acid concentrate, high phosphorus potassium stock solution, wood vinegar phenolic substances, and vitamin C.

[0010] Preferably, the functional strengthening module comprises selenium-lanthanum complex chelate and boron-zinc-IDHA chelate.

[0011] Preferably, the concentration of selenium in the selenium-lanthanum complex chelate is 0.1 mg / L, and the concentration of lanthanum is 43.3 mg / L.

[0012] Preferably, the concentration of boron in the boron-zinc-IDHA complex chelate is 0.286 mg / L, and the concentration of zinc is 0.1 mg / L.

[0013] Preferably, the preparation conditions of the trace element in the IDHA chelate are as follows: IDHA and inorganic trace element salts are mixed at a molar ratio of 1:1-1.2, and reacted at a pH of 5.0-6.5 and a temperature of 50-60℃ for 1-2h.

[0014] Preferably, the dilution multiple of the biomass charcoal extract when used is 250-1000 times.

[0015] Preferably, the carbon dioxide emulsion is treated by micro-encapsulation: adding natural phenolic substances in the wood vinegar, the carbon release period is extended to 15 days, and CO2 is prevented from escaping in advance.

[0016] Preferably, the preparation process of the base mother liquor is as follows:

[0017] Step A1. Preparation of amino acid stock solution;

[0018] Step A2. Preparation of IDHA chelated trace elements;

[0019] Step A3. Preparation of biomass charcoal extract;

[0020] Step A4. Preparation of carbon dioxide emulsion;

[0021] Step A5. Compounding and stirring to obtain the base mother liquor.

[0022] Preferably, the preparation process of the amino acid stock solution in step A1 is as follows:

[0023] Step A101. Raw material pretreatment: the pig hair is crushed to 1-2mm particles, and the impurities such as dirt and fibers in the hair are removed;

[0024] Step A102. Alkaline hydrolysis reaction: 10%-15% sodium hydroxide solution is added to the crushed pig hair at a solid-liquid ratio of 1:8-1:10, and heated at 80-90℃ for 2-3h, with the stirring rate controlled at 120-150r / min to ensure complete hydrolysis of the pig hair;

[0025] Step A103. Filtration and purification: after the reaction is completed, a 30μm ceramic filter is used to remove the un-decomposed residues to obtain the crude amino acid solution;

[0026] Step A104. Concentration adjustment: Determine the free amino acid content in the crude solution, dilute with water or concentrate under vacuum at 60℃ and -0.08MPa, and adjust to free amino acids ≥100g / L to obtain the amino acid stock solution.

[0027] Preferably, the preparation process of the trace elements chelated by IDHA in step A2 is as follows:

[0028] Step A201. Raw material ratio: Mix IDHA with trace element inorganic salts at a molar ratio of 1:1 to 1:1.2, wherein the mass ratio of each element in the trace element inorganic salts is Fe 20%-30%, Zn 15%-25%, Mn 15%-20%, Cu 10%-15%, and B 15%-25% to obtain mixed raw materials;

[0029] Step A202. Chelation reaction: Add the mixed raw materials to the reaction vessel, adjust the pH of the system to 5.0-6.5, raise the temperature to 50-60℃, and stir the reaction at 180-200r / min for 1-2h to form a stable chelate;

[0030] Step A203. Cooling and preparation: After the reaction is complete, allow the mixture to cool naturally to room temperature. Detect the chelation rate as ≥90%. If it is not qualified, add IDHA to adjust. After it is qualified, seal and store it to obtain the trace elements chelated by IDHA.

[0031] Preferably, the preparation process of the biochar extract in step A3 is as follows:

[0032] Step A301. Biochar preparation: Wheat straw is thermally decomposed at 450℃ and under oxygen-limited conditions with oxygen content ≤5% for 3-4 hours. After cooling, it is pulverized to 80-100 mesh to obtain wheat straw biochar.

[0033] Step A302. Extraction reaction: Mix wheat straw biochar and wood vinegar at a mass ratio of 1:40, place in a shaker, and extract at 60℃ and 180r / min for 1h.

[0034] Step A303. Filtration and dilution: Filter the extract using a 30μm ceramic filter to remove char particles and obtain the stock extract; dilute it 250-1000 times as needed before use and set aside to obtain the biochar extract.

[0035] Preferably, the preparation process of the carbon dioxide emulsion in step A4 is as follows:

[0036] Step A401. CO2 source: Collect high-purity CO2 (purity ≥ 95%) separated during the biogas purification process;

[0037] Step A402. High-pressure emulsification: CO2 is introduced into a high-pressure reactor and mixed with deionized water at a volume ratio of 1:8-1:10. The mixture is continuously micro-mixed and emulsified at a pressure of 0.5-1.0 MPa and a temperature of 25-30℃, with an emulsification speed of 3000-3500 r / min.

[0038] Step A403. Stabilization treatment: Add 0.5% guaiacol from wood vinegar to form a stable emulsion. The carbon release period is tested and found to be 11-15 days. The emulsion is then ready for use to obtain carbon dioxide emulsion.

[0039] Preferably, the compounding and stirring process described in step A5 is as follows:

[0040] Step A501. Feeding sequence: First, add the prescribed amount of water (25-30℃) to the reactor, then add the amino acid stock solution, IDHA chelated trace elements, biochar extract, and carbon dioxide emulsion in sequence. Stir for 10-15 minutes after each component is added to ensure uniform dispersion.

[0041] Step A502. Constant temperature stirring: Adjust the reactor temperature to 25-30℃, stir at a speed of 150-200 r / min, and continue stirring for 30-60 min. During this period, take samples every 15 min to check the mixing uniformity. Measure the total nitrogen content at different sampling points. The deviation should be ≤5%.

[0042] Step A503. pH adjustment: Use 10% hydrochloric acid or 10% sodium hydroxide solution to adjust the pH of the mixture to 4.5-6.5 to suit the root absorption environment of most crops;

[0043] Step A504. Static Filtration: After stirring, let stand at room temperature in the dark for 12-24 hours to allow small impurities to settle naturally. Then filter with a 30μm ceramic filter to remove the settled impurities and obtain a clear base mother liquor.

[0044] Preferably, the preparation process of the reproductive period targeting agent is as follows:

[0045] Step B1. Concentrate the basic mother liquor to 80% of its original volume under vacuum at 60℃ and -0.08MPa. Dilute the basic mother liquor with deionized water to 1.2 times its original volume to avoid excessive concentration inhibiting growth, and obtain amino acid concentrate.

[0046] Step B2. Pretreatment of key nutrients: Mix ammonium dihydrogen phosphate and potassium nitrate at a mass ratio of 3:2 to obtain a high phosphorus and potassium stock solution;

[0047] Step B3. First, add the pretreated base mother liquor (25-30℃) to a 30-50L reactor, then add the key nutrient components in the order of "easily soluble first, then insoluble": first add amino acid concentrate / high phosphorus and potassium stock solution, stir for 10 min, then add IDHA chelated trace elements, stir for 15 min, and finally add diluted biochar extract, stir for 20 min, stir at 25-30℃ and 180-200 r / min for 45-60 min, and adjust with 10% hydrochloric acid or 10% sodium hydroxide according to the soil pH range suitable for the crop growth period.

[0048] Step B4. Add 0.3%-0.5% wood vinegar phenolic substances and 0.2% vitamin C to obtain the reproductive period target agent.

[0049] Preferably, the preparation process of the functional enhancement module is as follows:

[0050] Step C1. Raw material pretreatment: Dissolve Na2SeO3 (0.1 mg / L) and La(NO3)3・6H2O (43.3 mg / L) in deionized water, add IDHA (molar ratio 1:1.2), adjust pH to 5.5-6.0, stir at 25℃ for 30 min, the chelation rate should be ≥90%, to obtain selenium-lanthanum composite chelate. Mix H3BO3 (0.286 mg / L), ZnSO4 (0.1 mg / L) and IDHA at a molar ratio of 1:1, stir at 50-60℃ for 1.5 h, and after cooling, test the chelation rate (≥90%) to obtain boron-zinc-IDHA chelate;

[0051] Step C2. Compound mixing: Selenium-lanthanum composite chelate, natural polyphenols and citric acid are mixed in a mass ratio of 70:20:10 to obtain mixture 1; then boron-zinc-IDHA chelate, vitamin C solution and wood vinegar phenols are mixed in a mass ratio of 65:25:10 to obtain mixture 2; mix mixture 1 and mixture 2 to obtain the functional enhancement module.

[0052] A method for preparing a plant nutrient-blended liquid fertilizer includes the following steps:

[0053] Add the base stock solution, growth period targeted agent and functional enhancement module to a constant temperature stirred reactor, stir at 25-30℃ and 180-200r / min for 45-60min to ensure uniform dispersion of each component, adjust the pH to 4.5-6.5, let stand for 8-12h, filter with a 0.45μm microporous membrane to remove tiny impurities, and obtain plant nutrient blended liquid fertilizer.

[0054] The beneficial effects of this invention are:

[0055] This invention provides a plant nutrient-balanced liquid fertilizer and its preparation method. By combining a base mother liquor, a growth-stage targeted agent, and a functional enhancement module, this invention can achieve precise nutrient supply tailored to the crop's growth stage, significantly improving crop yield and quality. At the same time, the product has strong stability, can improve soil, is environmentally friendly, and has broad application prospects. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0057] Example 1: A method for preparing a plant nutrient-blending liquid fertilizer, comprising the following steps:

[0058] S1. Raw material pretreatment: Crush the pig hair into 1-2mm particles to remove impurities such as mud and fibers from the hair;

[0059] S2. Alkaline hydrolysis reaction: Add 10% sodium hydroxide solution (by mass) to the crushed pig hair at a solid-liquid ratio of 1:8, heat at 80℃ for 2 hours, and control the stirring rate at 120 r / min during the process to ensure that the pig hair is fully hydrolyzed.

[0060] S3. Filtration and purification: After the reaction is completed, filter with a 30μm ceramic filter to remove undecomposed residues and obtain crude amino acid solution;

[0061] S4. Concentration adjustment: Determine the free amino acid content in the crude solution, dilute with water or concentrate under vacuum at 60℃ and -0.08MPa, and adjust to free amino acids ≥100g / L to obtain the amino acid stock solution;

[0062] S5. Raw material ratio: IDHA and trace element inorganic salts are mixed at a molar ratio of 1:1, wherein the mass ratio of each element in the trace element inorganic salts is Fe 20%, Zn 15%, Mn 15%, Cu 10%, and B 15% to obtain mixed raw materials;

[0063] S6. Chelation reaction: Add the mixed raw materials to the reaction vessel, adjust the pH of the system to 5.0, raise the temperature to 50℃, and stir the reaction at 180r / min for 1h to form a stable chelate;

[0064] S7. Cooling and storing: After the reaction is complete, allow it to cool naturally to room temperature. Detect the chelation rate as ≥90%. If it is not qualified, add IDHA to adjust. After it is qualified, seal and store it to obtain the trace elements chelated by IDHA.

[0065] S8. Biochar preparation: Wheat straw was thermally pyrolyzed at 450℃ and under oxygen-limited conditions of ≤5% for 3 hours. After cooling, it was pulverized to 80-100 mesh to obtain wheat straw biochar.

[0066] S9. Extraction reaction: Mix wheat straw biochar and wood vinegar at a mass ratio of 1:40, place in a shaker, and extract at 60℃ and 180r / min for 1h.

[0067] S10. Filtration and dilution: Filter the extract using a 30μm ceramic filter to remove char particles and obtain the stock extract; dilute 250-1000 times as needed before use and set aside to obtain biochar extract.

[0068] S11. CO2 source: High-purity CO2 (purity ≥ 95%) separated during biogas purification process;

[0069] S12. High-pressure emulsification: CO2 is introduced into a high-pressure reactor and mixed with deionized water at a volume ratio of 1:8. The mixture is continuously micro-mixed and emulsified at a pressure of 0.5 MPa and a temperature of 25°C, with an emulsification speed of 3000 r / min.

[0070] S13. Stabilization treatment: Add 0.5% guaiacol from wood vinegar to form a stable emulsion. The carbon release period is tested and found to be 11-15 days. The emulsion is then ready for use to obtain carbon dioxide emulsion.

[0071] S14. Feeding sequence: First add the prescribed amount of water (25-30℃) to the reactor, then add the amino acid stock solution, IDHA chelated trace elements, biochar extract, and carbon dioxide emulsion in sequence. Stir for 10 minutes after each component is added to ensure uniform dispersion.

[0072] S15. Constant Temperature Stirring: Adjust the reactor temperature to 25℃, stir at 150r / min, and continue stirring for 30min. During this period, take samples every 15min to check the mixing uniformity. Measure the total nitrogen content at different sampling points. The deviation should be ≤5%.

[0073] S16. pH adjustment: Use 10% hydrochloric acid or 10% sodium hydroxide solution to adjust the pH of the mixture to 4.5-6.5 to suit the root absorption environment of most crops;

[0074] S17. Static Filtration: After stirring, let stand at room temperature in the dark for 12 hours to allow small impurities to settle naturally. Then filter with a 30μm ceramic filter to remove the settled impurities and obtain a clear base mother liquor. The mass ratio of amino acid stock solution, IDHA chelated trace elements, biochar extract, carbon dioxide emulsion and water in the base mother liquor is 10:5:8:5:45.

[0075] S18. The basic mother liquor is concentrated to 80% of its original volume under vacuum at 60℃ and -0.08MPa. The basic mother liquor is then diluted with deionized water to 1.2 times its original volume to avoid excessive concentration from inhibiting growth, thus obtaining an amino acid concentrate.

[0076] S19. Pretreatment of key nutrients: Mix ammonium dihydrogen phosphate and potassium nitrate at a mass ratio of 3:2 and dissolve to obtain a high phosphorus and potassium stock solution;

[0077] S20. First, add the pretreated base mother liquor (25-30℃) to a 30-50L reactor, and then add the key nutrient components in the order of "easily soluble first and then difficult to soluble": first add amino acid concentrate / high phosphorus and potassium stock solution, stir for 10 min, then add IDHA chelated trace elements, stir for 15 min, and finally add diluted biochar extract, stir for 20 min, stir at 25℃ and 180 r / min for 45 min, and adjust with 10% hydrochloric acid or 10% sodium hydroxide according to the soil pH range suitable for the crop growth period.

[0078] S21. Add 0.3% wood vinegar phenolic substances and 0.2% vitamin C to obtain a reproductive period targeting agent;

[0079] S22. Raw material pretreatment: Dissolve Na2SeO3 (0.1 mg / L) and La(NO3)3・6H2O (43.3 mg / L) in deionized water, add IDHA (molar ratio 1:1.2), adjust pH to 5.5-6.0, stir at 25℃ for 30 min, the chelation rate should be ≥90%, to obtain selenium-lanthanum composite chelate; mix H3BO3 (0.286 mg / L), ZnSO4 (0.1 mg / L) and IDHA at a molar ratio of 1:1, stir at 50℃ for 1.5 h, and after cooling, test the chelation rate (≥90%) to obtain boron-zinc-IDHA chelate;

[0080] S23. Compound mixing: Selenium-lanthanum composite chelate, natural polyphenols and citric acid are mixed in a mass ratio of 70:20:10 to obtain mixture 1; then boron-zinc-IDHA chelate, vitamin C solution and wood vinegar phenols are mixed in a mass ratio of 65:25:10 to obtain mixture 2; mixture 1 and mixture 2 are mixed to obtain the functional enhancement module;

[0081] S24. The basic mother liquor, growth period target agent and functional enhancement module are mixed at a mass ratio of 60:10:5 and added to a constant temperature stirred reactor. The mixture is stirred at 25℃ and 180r / min for 45min to ensure uniform dispersion of each component. The pH is adjusted to 4.5, and the mixture is allowed to stand for 8h. It is then filtered through a 0.45μm microporous membrane to remove minute impurities, thus obtaining plant nutrient blended liquid fertilizer.

[0082] Example 2: A plant nutrient-blending liquid fertilizer, comprising the following steps:

[0083] A method for preparing a plant nutrient-blended liquid fertilizer includes the following steps:

[0084] S1. Raw material pretreatment: Crush the pig hair into 1-2mm particles to remove impurities such as mud and fibers from the hair;

[0085] S2. Alkaline hydrolysis reaction: Add 12% sodium hydroxide solution (by mass) to the crushed pig hair at a solid-liquid ratio of 1:8.5, heat at 83℃ for 2.5 hours, and control the stirring rate at 130 r / min during the process to ensure that the pig hair is fully hydrolyzed.

[0086] S3. Filtration and purification: After the reaction is completed, filter with a 30μm ceramic filter to remove undecomposed residues and obtain crude amino acid solution;

[0087] S4. Concentration adjustment: Determine the free amino acid content in the crude solution, dilute with water or concentrate under vacuum at 60℃ and -0.08MPa, and adjust to free amino acids ≥100g / L to obtain the amino acid stock solution;

[0088] S5. Raw material ratio: IDHA and trace element inorganic salts are mixed at a molar ratio of 1:1.1, wherein the mass ratio of each element in the trace element inorganic salts is Fe 23%, Zn 18%, Mn 17%, Cu 12%, and B 18% to obtain the mixed raw materials;

[0089] S6. Chelation reaction: Add the mixed raw materials to the reaction vessel, adjust the pH of the system to 5.5, raise the temperature to 53℃, and stir the reaction at 185r / min for 1.5h to form a stable chelate;

[0090] S7. Cooling and storing: After the reaction is complete, allow it to cool naturally to room temperature. Detect the chelation rate as ≥90%. If it is not qualified, add IDHA to adjust. After it is qualified, seal and store it to obtain the trace elements chelated by IDHA.

[0091] S8. Biochar preparation: Wheat straw was thermally decomposed at 450℃ and under oxygen-limited conditions with an oxygen content of ≤5% for 3.5h. After cooling, it was pulverized to 80-100 mesh to obtain wheat straw biochar.

[0092] S9. Extraction reaction: Mix wheat straw biochar and wood vinegar at a mass ratio of 1:40, place in a shaker, and extract at 60℃ and 180r / min for 1h.

[0093] S10. Filtration and dilution: Filter the extract using a 30μm ceramic filter to remove char particles and obtain the stock extract; dilute 250-1000 times as needed before use and set aside to obtain biochar extract.

[0094] S11. CO2 source: High-purity CO2 (purity ≥ 95%) separated during biogas purification process;

[0095] S12. High-pressure emulsification: CO2 is introduced into a high-pressure reactor and mixed with deionized water at a volume ratio of 1:9. The mixture is continuously micro-mixed and emulsified at a pressure of 0.7 MPa and a temperature of 27 °C, with an emulsification speed of 3200 r / min.

[0096] S13. Stabilization treatment: Add 0.5% guaiacol from wood vinegar to form a stable emulsion. The carbon release period is tested and found to be 11-15 days. The emulsion is then ready for use to obtain carbon dioxide emulsion.

[0097] S14. Feeding sequence: First add the prescribed amount of water (25-30℃) to the reactor, then add the amino acid stock solution, IDHA chelated trace elements, biochar extract, and carbon dioxide emulsion in sequence. Stir for 12 minutes after each component is added to ensure uniform dispersion.

[0098] S15. Constant Temperature Stirring: Adjust the reactor temperature to 27℃, stir at 170r / min, and continue stirring for 40min. During this period, take samples every 15min to check the mixing uniformity. Measure the total nitrogen content at different sampling points. The deviation should be ≤5%.

[0099] S16. pH adjustment: Use 10% hydrochloric acid or 10% sodium hydroxide solution to adjust the pH of the mixture to 4.5-6.5 to suit the root absorption environment of most crops;

[0100] S17. Static Filtration: After stirring, let stand at room temperature in the dark for 16 hours to allow small impurities to settle naturally. Then filter with a 30μm ceramic filter to remove the settled impurities and obtain a clear base mother liquor. The mass ratio of amino acid stock solution, IDHA chelated trace elements, biochar extract, carbon dioxide emulsion and water in the base mother liquor is 13:7:10:7:55.

[0101] S18. The basic mother liquor is concentrated to 80% of its original volume under vacuum at 60℃ and -0.08MPa. The basic mother liquor is then diluted with deionized water to 1.2 times its original volume to avoid excessive concentration from inhibiting growth, thus obtaining an amino acid concentrate.

[0102] S19. Pretreatment of key nutrients: Mix ammonium dihydrogen phosphate and potassium nitrate at a mass ratio of 3:2 and dissolve to obtain a high phosphorus and potassium stock solution;

[0103] S20. First, add the pretreated base mother liquor (25-30℃) to a 30-50L reactor, and then add the key nutrient components in the order of "easily soluble first and then difficult to soluble": first add amino acid concentrate / high phosphorus and potassium stock solution, stir for 10 min, then add IDHA chelated trace elements, stir for 15 min, and finally add diluted biochar extract, stir for 20 min, stir at 27℃ and 185r / min for 50 min, and adjust with 10% hydrochloric acid or 10% sodium hydroxide according to the soil pH range suitable for the crop growth period.

[0104] S21. Add 0.35% wood vinegar phenolic substances and 0.2% vitamin C to obtain a reproductive period targeting agent;

[0105] S22. Raw material pretreatment: Dissolve Na2SeO3 (0.1 mg / L) and La(NO3)3・6H2O (43.3 mg / L) in deionized water, add IDHA (molar ratio 1:1.2), adjust pH to 5.5-6.0, stir at 25℃ for 30 min, the chelation rate should be ≥90%, to obtain selenium-lanthanum composite chelate; mix H3BO3 (0.286 mg / L), ZnSO4 (0.1 mg / L) and IDHA at a molar ratio of 1:1, stir at 53℃ for 1.5 h, and after cooling, test the chelation rate (≥90%) to obtain boron-zinc-IDHA chelate;

[0106] S23. Compound mixing: Selenium-lanthanum composite chelate, natural polyphenols and citric acid are mixed in a mass ratio of 70:20:10 to obtain mixture 1; then boron-zinc-IDHA chelate, vitamin C solution and wood vinegar phenols are mixed in a mass ratio of 65:25:10 to obtain mixture 2; mixture 1 and mixture 2 are mixed to obtain the functional enhancement module;

[0107] S24. The basic mother liquor, growth period target agent and functional enhancement module are mixed at a mass ratio of 70:15:9 and added to a constant temperature stirred reactor. The mixture is stirred at 27℃ and 190r / min for 50min to ensure uniform dispersion of each component. The pH is adjusted to 5.5, and the mixture is allowed to stand for 9h. It is then filtered through a 0.45μm microporous membrane to remove minute impurities, thus obtaining plant nutrient blended liquid fertilizer.

[0108] Example 3: A method for preparing a plant nutrient-blending liquid fertilizer, comprising the following steps:

[0109] S1. Raw material pretreatment: Crush the pig hair into 1-2mm particles to remove impurities such as mud and fibers from the hair;

[0110] S2. Alkaline hydrolysis reaction: Add 14% sodium hydroxide solution (by mass) to the crushed pig hair at a solid-liquid ratio of 1:9, heat at 86℃ for 3 hours, and control the stirring rate at 140 r / min during the process to ensure that the pig hair is fully hydrolyzed.

[0111] S3. Filtration and purification: After the reaction is completed, filter with a 30μm ceramic filter to remove undecomposed residues and obtain crude amino acid solution;

[0112] S4. Concentration adjustment: Determine the free amino acid content in the crude solution, dilute with water or concentrate under vacuum at 60℃ and -0.08MPa, and adjust to free amino acids ≥100g / L to obtain the amino acid stock solution;

[0113] S5. Raw material ratio: IDHA and trace element inorganic salts are mixed at a molar ratio of 1:1.15, wherein the mass ratio of each element in the trace element inorganic salts is Fe 26%, Zn 20%, Mn 19%, Cu 14%, and B 22% to obtain mixed raw materials;

[0114] S6. Chelation reaction: Add the mixed raw materials to the reaction vessel, adjust the pH of the system to 6.0, raise the temperature to 56℃, and stir the reaction at 190r / min for 2h to form a stable chelate;

[0115] S7. Cooling and storing: After the reaction is complete, allow it to cool naturally to room temperature. Detect the chelation rate as ≥90%. If it is not qualified, add IDHA to adjust. After it is qualified, seal and store it to obtain the trace elements chelated by IDHA.

[0116] S8. Biochar preparation: Wheat straw was thermally pyrolyzed at 450℃ and under oxygen-limited conditions of ≤5% for 4 hours. After cooling, it was pulverized to 80-100 mesh to obtain wheat straw biochar.

[0117] S9. Extraction reaction: Mix wheat straw biochar and wood vinegar at a mass ratio of 1:40, place in a shaker, and extract at 60℃ and 180r / min for 1h.

[0118] S10. Filtration and dilution: Filter the extract using a 30μm ceramic filter to remove char particles and obtain the stock extract; dilute 250-1000 times as needed before use and set aside to obtain biochar extract.

[0119] S11. CO2 source: High-purity CO2 (purity ≥ 95%) separated during biogas purification process;

[0120] S12. High-pressure emulsification: CO2 is introduced into a high-pressure reactor and mixed with deionized water at a volume ratio of 1:9.5. The mixture is continuously micro-mixed and emulsified at a pressure of 0.9 MPa and a temperature of 29°C, with an emulsification speed of 3400 r / min.

[0121] S13. Stabilization treatment: Add 0.5% guaiacol from wood vinegar to form a stable emulsion. The carbon release period is tested and found to be 11-15 days. The emulsion is then ready for use to obtain carbon dioxide emulsion.

[0122] S14. Feeding sequence: First add the prescribed amount of water (25-30℃) to the reactor, then add the amino acid stock solution, IDHA chelated trace elements, biochar extract, and carbon dioxide emulsion in sequence. Stir for 14 minutes after each component is added to ensure uniform dispersion.

[0123] S15. Constant Temperature Stirring: Adjust the reactor temperature to 29℃, stir at 190r / min, and continue stirring for 50min. During this period, take samples every 15min to check the mixing uniformity. Measure the total nitrogen content at different sampling points. The deviation should be ≤5%.

[0124] S16. pH adjustment: Use 10% hydrochloric acid or 10% sodium hydroxide solution to adjust the pH of the mixture to 4.5-6.5 to suit the root absorption environment of most crops;

[0125] S17. Static Filtration: After stirring, let stand at room temperature in the dark for 20 hours to allow small impurities to settle naturally. Then filter with a 30μm ceramic filter to remove the settled impurities and obtain a clear base mother liquor. The mass ratio of amino acid stock solution, IDHA chelated trace elements, biochar extract, carbon dioxide emulsion and water in the base mother liquor is 16:9:12:9:65.

[0126] S18. The basic mother liquor is concentrated to 80% of its original volume under vacuum at 60℃ and -0.08MPa. The basic mother liquor is then diluted with deionized water to 1.2 times its original volume to avoid excessive concentration from inhibiting growth, thus obtaining an amino acid concentrate.

[0127] S19. Pretreatment of key nutrients: Mix ammonium dihydrogen phosphate and potassium nitrate at a mass ratio of 3:2 and dissolve to obtain a high phosphorus and potassium stock solution;

[0128] S20. First, add the pretreated base mother liquor (25-30℃) to a 30-50L reactor, then add the key nutrient components in the order of "easily soluble first, then insoluble": first add amino acid concentrate / high phosphorus and potassium stock solution, stir for 10 min, then add IDHA chelated trace elements, stir for 15 min, and finally add diluted biochar extract, stir for 20 min, stir at 29℃ and 190 r / min for 55 min, and adjust with 10% hydrochloric acid or 10% sodium hydroxide according to the soil pH range suitable for the crop growth period.

[0129] S21. Add 0.4% wood vinegar phenolic substances and 0.2% vitamin C to obtain a reproductive period targeting agent;

[0130] S22. Raw material pretreatment: Dissolve Na2SeO3 (0.1 mg / L) and La(NO3)3・6H2O (43.3 mg / L) in deionized water, add IDHA (molar ratio 1:1.2), adjust pH to 5.5-6.0, stir at 25℃ for 30 min, the chelation rate should be ≥90%, to obtain selenium-lanthanum composite chelate; mix H3BO3 (0.286 mg / L), ZnSO4 (0.1 mg / L) and IDHA at a molar ratio of 1:1, stir at 56℃ for 1.5 h, and after cooling, test the chelation rate (≥90%) to obtain boron-zinc-IDHA chelate;

[0131] S23. Compound mixing: Selenium-lanthanum composite chelate, natural polyphenols and citric acid are mixed in a mass ratio of 70:20:10 to obtain mixture 1; then boron-zinc-IDHA chelate, vitamin C solution and wood vinegar phenols are mixed in a mass ratio of 65:25:10 to obtain mixture 2; mixture 1 and mixture 2 are mixed to obtain the functional enhancement module;

[0132] S24. The basic mother liquor, growth period target agent and functional enhancement module are mixed at a mass ratio of 80:20:12 and added to a constant temperature stirred reactor. The mixture is stirred at 29℃ and 195r / min for 55min to ensure uniform dispersion of each component. The pH is adjusted to 6.0, and the mixture is allowed to stand for 10h. It is then filtered through a 0.45μm microporous membrane to remove minute impurities, thus obtaining plant nutrient blended liquid fertilizer.

[0133] Example 4: A method for preparing a plant nutrient-blending liquid fertilizer, comprising the following steps:

[0134] S1. Raw material pretreatment: Crush the pig hair into 1-2mm particles to remove impurities such as mud and fibers from the hair;

[0135] S2. Alkaline hydrolysis reaction: Add 15% sodium hydroxide solution (by mass) to the crushed pig hair at a solid-liquid ratio of 1:10, heat at 90℃ for 3 hours, and control the stirring rate at 150 r / min during the process to ensure that the pig hair is fully hydrolyzed.

[0136] S3. Filtration and purification: After the reaction is completed, filter with a 30μm ceramic filter to remove undecomposed residues and obtain crude amino acid solution;

[0137] S4. Concentration adjustment: Determine the free amino acid content in the crude solution, dilute with water or concentrate under vacuum at 60℃ and -0.08MPa, and adjust to free amino acids ≥100g / L to obtain the amino acid stock solution;

[0138] S5. Raw material ratio: IDHA and trace element inorganic salts are mixed at a molar ratio of 1:1.2, wherein the mass ratio of each element in the trace element inorganic salts is Fe 30%, Zn 25%, Mn 20%, Cu 15%, B 25%, to obtain the mixed raw material;

[0139] S6. Chelation reaction: Add the mixed raw materials to the reaction vessel, adjust the pH of the system to 6.5, raise the temperature to 60℃, and stir the reaction at 200r / min for 2h to form a stable chelate;

[0140] S7. Cooling and storing: After the reaction is complete, allow it to cool naturally to room temperature. Detect the chelation rate as ≥90%. If it is not qualified, add IDHA to adjust. After it is qualified, seal and store it to obtain the trace elements chelated by IDHA.

[0141] S8. Biochar preparation: Wheat straw was thermally pyrolyzed at 450℃ and under oxygen-limited conditions of ≤5% for 4 hours. After cooling, it was pulverized to 80-100 mesh to obtain wheat straw biochar.

[0142] S9. Extraction reaction: Mix wheat straw biochar and wood vinegar at a mass ratio of 1:40, place in a shaker, and extract at 60℃ and 180r / min for 1h.

[0143] S10. Filtration and dilution: Filter the extract using a 30μm ceramic filter to remove char particles and obtain the stock extract; dilute 250-1000 times as needed before use and set aside to obtain biochar extract.

[0144] S11. CO2 source: High-purity CO2 (purity ≥ 95%) separated during biogas purification process;

[0145] S12. High-pressure emulsification: CO2 is introduced into a high-pressure reactor and mixed with deionized water at a volume ratio of 1:10. The mixture is continuously micro-mixed and emulsified at a pressure of 1.0 MPa and a temperature of 30°C, with an emulsification speed of 3500 r / min.

[0146] S13. Stabilization treatment: Add 0.5% guaiacol from wood vinegar to form a stable emulsion. The carbon release period is tested and found to be 11-15 days. The emulsion is then ready for use to obtain carbon dioxide emulsion.

[0147] S14. Feeding sequence: First add the prescribed amount of water (25-30℃) to the reactor, then add the amino acid stock solution, IDHA chelated trace elements, biochar extract, and carbon dioxide emulsion in sequence. Stir for 15 minutes after each component is added to ensure uniform dispersion.

[0148] S15. Constant Temperature Stirring: Adjust the reactor temperature to 30℃, stir at a stirring rate of 200r / min, and continue stirring for 60min. During this period, take samples every 15min to check the mixing uniformity. Measure the total nitrogen content at different sampling points. The deviation should be ≤5%.

[0149] S16. pH adjustment: Use 10% hydrochloric acid or 10% sodium hydroxide solution to adjust the pH of the mixture to 4.5-6.5 to suit the root absorption environment of most crops;

[0150] S17. Static Filtration: After stirring, let stand at room temperature in the dark for 24 hours to allow small impurities to settle naturally. Then filter with a 30μm ceramic filter to remove the settled impurities and obtain a clear base mother liquor. The mass ratio of amino acid stock solution, IDHA chelated trace elements, biochar extract, carbon dioxide emulsion and water in the base mother liquor is 20:10:15:10:70.

[0151] S18. The basic mother liquor is concentrated to 80% of its original volume under vacuum at 60℃ and -0.08MPa. The basic mother liquor is then diluted with deionized water to 1.2 times its original volume to avoid excessive concentration from inhibiting growth, thus obtaining an amino acid concentrate.

[0152] S19. Pretreatment of key nutrients: Mix ammonium dihydrogen phosphate and potassium nitrate at a mass ratio of 3:2 and dissolve to obtain a high phosphorus and potassium stock solution;

[0153] S20. First, add the pretreated base mother liquor (25-30℃) to a 30-50L reactor, and then add the key nutrient components in the order of "easily soluble first and then difficult to soluble": first add amino acid concentrate / high phosphorus and potassium stock solution, stir for 10 min, then add IDHA chelated trace elements, stir for 15 min, and finally add diluted biochar extract, stir for 20 min, stir at 30℃ and 200 r / min for 60 min, and adjust with 10% hydrochloric acid or 10% sodium hydroxide according to the soil pH range suitable for the crop growth period.

[0154] S21. Add 0.5% wood vinegar phenolic substances and 0.2% vitamin C to obtain a reproductive period targeting agent;

[0155] S22. Raw material pretreatment: Dissolve Na2SeO3 (0.1 mg / L) and La(NO3)3・6H2O (43.3 mg / L) in deionized water, add IDHA (molar ratio 1:1.2), adjust pH to 5.5-6.0, stir at 25℃ for 30 min, the chelation rate should be ≥90%, to obtain selenium-lanthanum composite chelate; mix H3BO3 (0.286 mg / L), ZnSO4 (0.1 mg / L) and IDHA at a molar ratio of 1:1, stir at 60℃ for 1.5 h, and after cooling, test the chelation rate (≥90%) to obtain boron-zinc-IDHA chelate;

[0156] S23. Compound mixing: Selenium-lanthanum composite chelate, natural polyphenols and citric acid are mixed in a mass ratio of 70:20:10 to obtain mixture 1; then boron-zinc-IDHA chelate, vitamin C solution and wood vinegar phenols are mixed in a mass ratio of 65:25:10 to obtain mixture 2; mixture 1 and mixture 2 are mixed to obtain the functional enhancement module;

[0157] S24. The basic mother liquor, growth period target agent and functional enhancement module are mixed at a mass ratio of 85:25:15 and added to a constant temperature stirred reactor. The mixture is stirred at 30℃ and 200r / min for 60min to ensure uniform dispersion of each component. The pH is adjusted to 6.5, and the mixture is allowed to stand for 12h. The mixture is then filtered through a 0.45μm microporous membrane to remove minute impurities, thus obtaining a plant nutrient blended liquid fertilizer.

[0158] Comparative Example 1:

[0159] Compared with Example 2, this comparative example did not add growth period targeting agents and functional enhancement modules during the preparation of plant nutrient-balanced liquid fertilizer. All other steps and parameters were the same, and will not be repeated here. The final product was plant nutrient-balanced liquid fertilizer.

[0160] Comparative Example 2:

[0161] Compared with Example 1, this comparative example only replaces "IDHA chelates trace elements in the basic mother liquor" with "EDTA". All other steps and parameters are the same, and will not be repeated here. The final product is a plant nutrient-balanced liquid fertilizer.

[0162] Comparative Example 3:

[0163] Compared with Example 3, this comparative example only removes the biochar extract from the basic mother liquor. All other steps and parameters are the same, and will not be repeated here. The final product is a plant nutrient-balanced liquid fertilizer.

[0164] Comparative Example 4:

[0165] Compared with Example 2, this comparative example only removes the CO2 emulsion from the base mother liquor. All other steps and parameters are the same, and will not be repeated here. The final product is a plant nutrient-balanced liquid fertilizer.

[0166] Comparative Example 5:

[0167] This comparative example uses commercially available traditional compound liquid fertilizer (without modular design, EDTA chelation, and biochar / CO2 emulsion).

[0168] Performance testing:

[0169] The products prepared in Examples 1-3 and Comparative Examples 1-5 were subjected to the following performance tests:

[0170] Properties of liquid fertilizer itself:

[0171] 1. Chelation rate of trace elements: titration method;

[0172] 2. Stability (stratification rate): After standing at 25℃ for 72 hours and storing at 4℃ for 7 days, the percentage of stratified volume was measured.

[0173] 3. CO2 carbon release period: Total carbon release period measured by a TOC meter;

[0174] Crop growth indicators:

[0175] 1. Photosynthetic rate: measured using an AM 200 area meter;

[0176] 2. Seed setting rate / thousand-grain weight / inflorescence quantity: Actual yield measurement (camellia seed setting rate / thousand-grain weight of wheat), visual statistics (rhododendron inflorescence quantity);

[0177] Crop quality indicators:

[0178] 1. Grain protein content: determined using the Coomassie Brilliant Blue G-250 method;

[0179] 2. Leaf chlorophyll content: extracted using acetone.

[0180] Soil compatibility index:

[0181] 1. Soil pH changes: The soil-to-water ratio (1:5) potential method was used;

[0182] 2. Soil organic matter content: determined using the potassium dichromate external heating method;

[0183] The results are shown in Tables 1-4 below:

[0184] Table 1. Performance test data of liquid fertilizer

[0185] Item Chelation rate / % 72h standing delamination rate / % 4℃ storage for 7 days stability CO2carbon release period / day Example 1 92.3 0.8 No delamination 14 Example 2 91.7 0.6 No delamination 13 Example 3 93.1 0.7 No delamination 12 Comparative Example 1 91.5 0.9 No delamination 13 Comparative Example 2 70.2 5.3 Slight delamination 13 Comparative Example 3 92.0 1.2 No delamination 12 Comparative Example 4 91.8 0.7 No delamination - Comparative Example 5 68.5 8.7 Obvious delamination -

[0186] Table 2 Crop growth index test data

[0187] Item Crop Photosynthetic rate / μmol / m²・s Seed setting rate / 1,000-grain weight / inflorescence amount Example 1 Camellia oleifera 18.6 Seed setting rate 89.2% Example 2 Wheat 16.3 1,000-grain weight 45.2g Example 3 Rhododendron simsii 15.7 Total inflorescence amount 68.5 / plant Comparative Example 1 Wheat 14.1 1,000-grain weight 41.5g Comparative Example 2 Camellia oleifera 16.2 Seed setting rate 81.5% Comparative Example 3 Rhododendron simsii 13.9 Total inflorescence amount 45.2 / plant Comparative Example 4 Wheat 13.8 1,000-grain weight 40.8g Comparative Example 5 Camellia oleifera 15.3 Seed setting rate 78.3% Comparative Example 5 Wheat 13.5 1,000-grain weight 40.2g Comparative Example 5 Rhododendron simsii 12.8 Total inflorescence amount 42.8 / plant

[0188] Table 3 Crop quality index test data

[0189] Item Crop Grain protein content / % Leaf chlorophyll content / g / kg Example 1 Camellia oleifera - 2.59 Example 2 Wheat 14.8 2.47 Example 3 Rhododendron simsii - 2.63 Comparative Example 1 Wheat 12.3 2.21 Comparative Example 2 Camellia oleifera - 2.35 Comparative Example 3 Rhododendron simsii - 2.31 Comparative Example 4 Wheat 11.9 2.18 Comparative Example 5 Camellia oleifera - 2.05 Comparative Example 5 Wheat 11.5 2.10 Comparative Example 5 Rhododendron simsii - 2.20

[0190] Table 4 Soil compatibility test data (Rhododendron / Camellia oleifera)

[0191] Item Crop Soil initial pH Soil pH after fertilization Soil organic matter content / g / kg Example 1 Camellia oleifera 6.8 6.2 24.06 Example 3 Rhododendron simsii 6.7 5.0 26.9 Example 3 Rhododendron simsii 6.7 6.1 19.35 Comparative Example 5 Camellia oleifera 6.8 6.6 20.2 Comparative Example 5 Rhododendron simsii 6.7 6.4 18.9

[0192] Data Analysis:

[0193] As can be seen from Tables 1-4, Comparative Example 1, lacking the "growth period targeted agent + functional enhancement module" and using only the basic mother liquor, showed significantly lower key wheat indicators compared to Example 2.

[0194] The photosynthetic rate decreased by 13.5% (14.1 vs 16.3 μmol / m²・s) due to the lack of B-Mo seed agent during the grain-filling period, which affected the activity of photosynthetic enzymes.

[0195] The thousand-grain weight decreased by 8.2% (41.5 vs 45.2g), and the protein content decreased by 17.1% (12.3% vs 14.8%). This was because the chelated Mo in the functional enhancement module could not be replenished, thus limiting protein synthesis.

[0196] Comparative Example 2, which replaced IDHA with EDTA, exposed the shortcomings of traditional chelating agents:

[0197] The chelation rate dropped from 92.3% to 70.2% because EDTA easily combines with Ca²⁺ and precipitates in alkaline soil, resulting in the inability of tea oil tea to absorb trace elements;

[0198] The stratification rate increased from 0.8% to 5.3% after 72 hours, indicating stratification during low-temperature storage due to the poor stability of EDTA chelates.

[0199] The fruit setting rate of camellia oleifera decreased by 8.6% (81.5% vs 89.2%) due to insufficient supply of effective nutrients.

[0200] Comparative Example 3: After removal of biochar extract, the growth of rhododendrons and soil indicators deteriorated significantly.

[0201] The soil pH only decreased from 6.7 to 6.1 (in Example 3 it decreased to 5.0), which was not suitable for the acidic requirements of azaleas, resulting in obstructed root absorption;

[0202] The total number of inflorescences decreased by 34.0% (45.2 vs 68.5 per plant), and the soil organic matter content decreased by 28.1% (19.35 vs 26.9 g / kg). This is because the porous structure of biochar can adsorb nutrients and improve soil aeration.

[0203] Comparative Example 4: After removing the CO2 emulsion, wheat photosynthetic and yield indicators decreased.

[0204] The photosynthetic rate decreased by 15.3% (13.8 vs 16.3 μmol / m²・s) because CO2 is a photosynthetic substrate, and its absence limited the dark reaction.

[0205] The thousand-grain weight decreased by 9.7% (40.8 vs 45.2g) and the protein content decreased by 19.6% (11.9% vs 14.8%) due to insufficient dry matter accumulation.

[0206] Commercially available traditional liquid fertilizers (Comparative Example 5) are inferior to the embodiments of the present invention in all dimensions:

[0207] The chelation rate was low at 23.8%-24.6% (68.5% vs 91.7%-93.1%), and the stability was poor (separation rate 8.7% vs <1%).

[0208] Significant differences were found in crop yield and quality: Camellia oleifera had a 12.2% lower seed setting rate, wheat had a 22.3% lower protein content, and rhododendron had a 37.5% lower inflorescence quantity.

[0209] The soil has a weak ability to improve soil quality: the pH of the Camellia oleifera soil decreased by only 0.2 units (vs. 0.6 in Example 1), and the organic matter content was 16.1% lower.

[0210] The product provided by this invention, through a modular design of "basic mother liquor + growth period targeted agent + functional enhancement module", combined with core technologies such as IDHA chelation, biochar extract, and CO2 emulsion, is significantly superior to comparative ratios lacking key components and traditional commercially available products in terms of fertilizer efficiency (crop yield +8%-12%, quality +10%-17%), stability (stratification rate <1%), and soil compatibility (pH adjustment of 0.8-1.7 units). It has outstanding technological innovation and application value.

[0211] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.

[0212] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A plant nutrient cocktail liquid fertilizer, characterized by, The base mother liquor is prepared from amino acid stock solution, IDHA chelated trace elements, biomass charcoal extract, carbon dioxide emulsion and water in a mass ratio of 10-20:5-10:8-15:5-10:45-70. The base mother liquor is prepared from amino acid stock solution, IDHA chelated trace elements, biomass charcoal extract, carbon dioxide emulsion and water in a mass ratio of 10-20:5-10:8-15:5-10:45-70. The growth period targeting sub-agent is prepared from the base mother liquor, amino acid concentrate, high-phosphorus potassium stock solution, wood vinegar phenolic substances and vitamin C. The functional enhancement module comprises selenium-lanthanum complex chelate and boron-zinc-IDHA chelate. The concentration of selenium in the selenium-lanthanum complex chelate is 0.1 mg / L, and the concentration of lanthanum is 43.3 mg / L. The concentration of boron in the boron-zinc-IDHA chelate is 0.286 mg / L, and the concentration of zinc is 0.1 mg / L.

2. The plant nutrient cocktail liquid fertilizer according to claim 1, wherein, The preparation conditions of the IDHA chelated trace elements are as follows: IDHA and inorganic trace element salts are mixed in a molar ratio of 1:1-1.2, and the reaction is carried out at a pH of 5.0-6.5 and a temperature of 50-60℃ for 1-2h. The dilution multiple of the biomass charcoal extract when used is 250-1000 times. The preparation process of the base mother liquor is as follows: Step A1. Preparation of amino acid stock solution; Step A2. Preparation of IDHA chelated trace elements; Step A3. Preparation of biomass charcoal extract; Step A4. Preparation of carbon dioxide emulsion; Step A5. Compounding and stirring to obtain the base mother liquor.

3. The plant nutrient cocktail liquid fertilizer of claim 1, wherein, The preparation process of the amino acid stock solution in step A1 is as follows: Step A101. Raw material pretreatment: the pig hair is pulverized to 1-2 mm particles to obtain pulverized pig hair; Step A102. Alkaline hydrolysis reaction: 10%-15% sodium hydroxide solution is added to the pulverized pig hair in a solid-liquid ratio of 1:8-1:10, and the mixture is heated at 80-90℃ for 2-3h with the stirring speed controlled at 120-150 r / min; Step A103. Filtration and purification: after the reaction is completed, the crude amino acid solution is obtained by filtering with a 30 μm ceramic filter; Step A104. Concentration adjustment: the free amino acid content in the crude solution is determined, and the solution is diluted with water or concentrated under vacuum at 60℃ and -0.08 MPa to adjust the free amino acid content to ≥100 g / L to obtain the amino acid stock solution.

4. The plant nutrient cocktail liquid fertilizer of claim 1, wherein, The preparation process of the IDHA chelated trace elements in step A2 is as follows: Step A201. Raw material proportioning: IDHA and inorganic trace element salts are mixed in a molar ratio of 1:1-1:1.2, and the mass ratio of each element in the inorganic trace element salts is Fe 20%-30%, Zn 15%-25%, Mn 15%-20%, Cu 10%-15% and B 15%-25% to obtain the mixed raw materials; Step A202. Chelation reaction: the mixed raw materials are added to a reaction kettle, the pH of the system is adjusted to 5.0-6.5, the temperature is raised to 50-60℃, and the mixture is stirred at 180-200 r / min for 1-2h to form stable chelates; Step A203. Cooling standby: After the reaction is completed, it is naturally cooled to room temperature, and the chelation rate is detected to be ≥90%. If it is unqualified, IDHA is added to adjust it. After passing the test, it is sealed and stored to obtain trace elements chelated by IDHA.

5. The plant nutrient cocktail liquid fertilizer of claim 1, wherein, The preparation process of the biomass charcoal extract in step A3 is as follows: Step A301. Preparation of biomass charcoal: wheat straw is pyrolyzed under limited oxygen conditions with oxygen content ≤5% at 450°C for 3-4h, and then crushed to 80-100 mesh after cooling to obtain wheat straw biomass charcoal; Step A302. Extraction reaction: mix the wheat straw biomass charcoal and vinegar liquid at a mass ratio of 1:40, place it in a shaking bed, and extract it at 60°C and 180r / min for 1h; Step A303. Filtration and dilution: filter the extraction liquid with a 30μm ceramic filter, and dilute it 250-1000 times as needed before use to obtain the biomass charcoal extract.

6. The plant nutrient cocktail liquid fertilizer of claim 1, wherein, The preparation process of the carbon dioxide emulsion in step A4 is as follows: Step A401. CO2 source: collect high-purity CO2 separated in the biogas purification process; Step A402. High-pressure emulsification: introduce CO2 into a high-pressure reaction kettle, mix it with deionized water at a volume ratio of 1:8-1:10, and continuously micro-mix emulsify it at a pressure of 0.5-1.0 MPa and a temperature of 25-30°C, with an emulsification speed of 3000-3500r / min; Step A403. Stable treatment: add 0.5% guaiacol in vinegar to form a stable emulsion, and detect that the carbon release period reaches 11-15 days, standby, to obtain the carbon dioxide emulsion.

7. The plant nutrient cocktail liquid fertilizer of claim 1, wherein, The process of the compound stirring in step A5 is as follows: Step A501. Feeding sequence: first add the formula amount of water to the reaction kettle, then add the amino acid stock solution, IDHA chelated trace elements, biomass charcoal extract, and carbon dioxide emulsion in sequence, and stir for 10-15min after adding each component to ensure uniform dispersion; Step A502. Constant temperature stirring: adjust the temperature of the reaction kettle to 25-30°C, and stir at a speed of 150-200r / min for 30-60min, and take samples every 15min to detect the uniformity of the mixture. The total nitrogen content at different sampling points is measured, and the deviation should be ≤5%; Step A503. pH adjustment: adjust the pH of the mixture to 4.5-6.5 with 10% hydrochloric acid or 10% sodium hydroxide solution; Step A504. Standing and filtration: after stirring, stand at room temperature in the dark for 12-24h, and then filter with a 30μm ceramic filter to obtain a clear base mother liquor.

8. The plant nutrient cocktail liquid fertilizer of claim 1, wherein, The preparation process of the growth period targeted sub-agent is as follows: Step B1. Concentrate the base mother liquor at 60°C and -0.08MPa vacuum to 80% of the original volume, and dilute the base mother liquor with deionized water to 1.2 times the original volume to obtain an amino acid concentrate; Step B2. Pretreatment of key nutrient components: mix ammonium dihydrogen phosphate and potassium nitrate at a mass ratio of 3:2 to obtain a high-phosphorus potassium stock solution; Step B3. First, add the pretreated base mother liquor to the reaction kettle, then add the amino acid concentrate and high-phosphorus potassium stock solution, stir for 10 min, then add the IDHA chelated trace elements, stir for 15 min, and finally add the diluted biomass charcoal extract, stir for 20 min, and stir at 25-30℃, 180-200r / min for 45-60 min. Adjust with 10% hydrochloric acid or 10% sodium hydroxide; Step B4. Add 0.3%-0.5% wood vinegar phenolic substances and 0.2% vitamin C to obtain the growth period targeted sub-agent.

9. The plant nutrient cocktail liquid fertilizer of claim 1, wherein, The preparation process of the functional enhancement module is as follows: Step C1. Raw material pretreatment: Dissolve Na2SeO3 and La(NO3)3・6H2O in deionized water, add IDHA, adjust the pH to 5.5-6.0, and stir at 25℃ for 30 min to obtain a selenium-lanthanum complex chelate. Mix H3BO3, ZnSO4 and IDHA at a molar ratio of 1:1, stir at 50-60℃ for 1.5h to obtain a boron-zinc-IDHA chelate; Step C2. Compound mixing: Mix the selenium-lanthanum complex chelate, natural polyphenol and citric acid at a mass ratio of 70:20:10 to obtain a mixed solution 1; mix the boron-zinc-IDHA chelate, vitamin C solution and wood vinegar phenols at a mass ratio of 65:25:10 to obtain a mixed solution 2; mix the mixed solution 1 and the mixed solution 2 to obtain the functional enhancement module.

10. The method of preparing a plant nutrient cocktail liquid fertilizer according to any one of claims 1-9, characterized in that, The following steps are included: Add the base mother liquor, growth period targeted sub-agent and functional enhancement module to the constant temperature stirring reaction kettle, stir at 25-30℃, 180-200r / min for 45-60 min to ensure uniform dispersion of each component, adjust the pH to 4.5-6.5, stand for 8-12h, filter with a 0.45μm microporous filter to remove small impurities, and obtain the plant nutrient blended liquid fertilizer.