Process for improving air permeability of soil by using acetylisovaleryltylosin tartrate finished product liquid composite liquid fertilizer

Abstract

The invention belongs to the field of compound liquid fertilizers, and particularly relates to a process for improving the air permeability of soil by using an acetylisovaleryltylosin tartrate finished product liquid compound liquid fertilizer. Comprising the following steps: diluting dry powder of acetylisovaleryltylosin tartrate according to a mass ratio of 1: (100-500) to obtain finished product liquid of acetylisovaleryltylosin tartrate; performing aerobic culture in a liquid culture medium containing starch, yeast powder, soybean meal, yeast extract and inorganic salt, and controlling the fermentation time to be 36-110 hours to obtain acetylisovaleryltylosin tartrate fermentation liquor; the preparation method comprises the following steps: adding water into a reaction kettle, introducing water vapor, controlling the temperature at 50-60 DEG C, and slowly adding special potassium humate into the reaction kettle while stirring; slowly adding solid acetylisovaleryltylosin tartrate into the reaction kettle while stirring to prepare an acetylisovaleryltylosin tartrate finished product liquid composite liquid fertilizer; according to the acetylisovaleryltylosin tartrate finished product liquid composite liquid fertilizer, the permeability of soil can be improved, and the porosity, especially the proportion of non-capillary gaps in the total porosity, of the soil is continuously increased, so that the air permeability of the soil is enhanced.

Description

Technical Field

[0001] The invention belongs to the field of composite liquid fertilizers, in particular to a process for improving soil air permeability by using tyvalosin finished liquid composite liquid fertilizer. Background Art

[0002] Liquid compound fertilizer (Fluid Fertilizer), also known as fluid compound fertilizer, commonly known as liquid fertilizer, is a liquid product containing two or more nutrients required by crops. These nutrients are dissolved in water as solutes to form a solution or suspended in water with the help of a suspending agent to form a suspended paste. Liquid fertilizers have developed to date and there are many varieties, which can be roughly divided into two categories: liquid nitrogen fertilizer and liquid compound fertilizer. The effective substances of liquid nitrogen fertilizer include ammonium, nitrate and amide nitrogen, such as liquid ammonia, ammonia water, and nitrogen solution. Liquid compound fertilizer contains all the nutrients required for plant growth, such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur and trace elements, etc., and organic substances soluble in water (such as humic acid, amino acids, plant growth regulators, etc.) can also be added. Liquid compound fertilizer can be designed according to the nutritional requirements of crop growth. The fertilizer formula can be adjusted at any time according to the different growth of crops. Scientific formulas can significantly improve fertilizer utilization. The fertilizer efficiency of liquid fertilizers is usually more than 30% higher than that of conventional compound fertilizers. Tylosin, also known as super tylosin, has a chemical name of 3-O-acetyl-4”-O-isovaleryl tylosin. It is an antibiotic specifically for livestock and poultry. Tylosin is a new type of macrolide antibiotic obtained by biotransformation of tylosin by Streptomyces thermotolerans, acetylation at the 3-position and isovalerylation at the 4” position. Due to the change in its chemical structure, it has obvious advantages over tylosin in terms of antibacterial spectrum, antibacterial activity, drug resistance, chemical stability, oral absorbability and blood drug concentration.

[0003] In the prior art, compound liquid fertilizers will become compacted after use, mainly due to the following situations: Single ingredients: The nutrients in the liquid fertilizer may tend to be a certain type, such as nitrogen fertilizer, and lack other necessary nutrients. Long-term partial application of liquid fertilizers will lead to a decrease in the organic matter content in the soil and a deterioration of the soil structure, thereby affecting the activity of microorganisms, causing the soil aggregate structure to be destroyed and the soil to become compacted. Excessive use: If the nutrients in the liquid fertilizer are used excessively, it will lead to the accumulation of salt in the soil, destroy the soil aggregate structure, and cause the soil to become compacted. Soil texture: If the soil texture itself is sticky and the tillage layer is shallow, then after using liquid fertilizer, the capillary pores in the soil are easily blocked, resulting in a crust on the surface of the soil, further aggravating the compaction of the soil. Irrigation method: Unreasonable irrigation methods, such as flooding, will destroy the soil aggregate structure, squeeze out the air in the soil, and cause the soil to become compacted. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art and solve at least one of the technical problems raised in the background technology, such as the compaction of compound liquid fertilizer after use, it is mainly caused by the following situations: Single composition: The nutrients in the liquid fertilizer may tend to a certain category, such as nitrogen fertilizer, and lack other necessary nutrients. Long-term partial application of liquid fertilizer will lead to a decrease in the organic matter content in the soil and deterioration of the soil structure, thereby affecting the activity of microorganisms, causing the soil aggregate structure to be destroyed and the soil to become compacted. Excessive use: If the nutrients in the liquid fertilizer are used excessively, it will cause salt accumulation in the soil, destroy the soil aggregate structure, and cause soil compaction. Soil texture: If the soil texture itself is sticky and the tillage layer is shallow, then after using liquid fertilizer, the capillary pores in the soil are easily blocked, resulting in soil crusting on the surface, further aggravating soil compaction. Irrigation method: Unreasonable irrigation methods, such as flooding, will destroy the soil aggregate structure, squeeze out the air in the soil, and cause the problem of soil compaction.

[0005] The technical solution adopted by the present invention to solve the technical problem is: the process of improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer described in the present invention comprises the following steps: Step 1: diluting the tyvalosin dry powder at a mass ratio of 1:100-500 to obtain a tyvalosin finished liquid; Step 2: aeration culture is carried out in a liquid culture medium containing starch, yeast powder, soybean powder, yeast paste and inorganic salts. During the fermentation process of tylosin, the pH value will rise to about 7.5 at the initial stage of fermentation. First, an appropriate amount of acetic acid is added to adjust the pH value. When the pH value drops to 7.3, a mixture of substrate tylosin dry powder and an inducer is added. After the mixture is added, the pH value begins to rise. An appropriate amount of glucose solution needs to be added to adjust the pH value of the fermentation process so that the pH value is always controlled at 7.00-7.30. The fermentation time is controlled at 36-110 hours to obtain a tylosin fermentation liquid. Step 3: adding water to the reaction kettle, introducing water vapor, controlling the temperature between 50-60° C., slowly adding potassium dihydrogen phosphate to the reaction kettle, and mixing and stirring until the potassium dihydrogen phosphate is basically dissolved; Slowly adding the specially prepared potassium humate into the reactor under stirring; The solid tyvalosin is slowly added into the reaction kettle under stirring to prepare the tyvalosin finished liquid composite liquid fertilizer.

[0006] As a further solution of the present invention: tylosin dry powder: L-leucine: L-valine = 10:2:1 (w:w:w).

[0007] As a further solution of the present invention: Step 2, further comprising the following post-processing steps: Acidification: Use acetic acid to adjust the pH value of the tyvalosin fermentation liquid to 4.6, let it stand for 20 minutes, continue to add acetic acid to adjust the pH to 2.0, let it stand for 45 minutes, then adjust it back to 4.0 with sodium hydroxide and let it stand for 45 minutes.

[0008] As a further solution of the present invention: post-processing also includes the following steps: Plate and frame filtration and refiltration: The temperature is raised to 32°C and plate and frame filtration is performed. The filter cloth used for plate and frame filtration is polypropylene. The filtrate obtained is cooled to 25°C, and after the pH is adjusted to 6.0 with sodium bicarbonate, nanofiltration is performed to obtain the nanofiltrate, in which the pore size of the nanomembrane is 2nm.

[0009] As a further solution of the present invention: post-processing also includes the following steps: Crystallization: cool the nanofiltrate to 20° C., control the stirring speed to 15 r / min, adjust the pH value to 8.5, and precipitate solid tyvalocin.

[0010] As a further solution of the present invention: in step 3: slowly adding potassium hydroxide into the reaction kettle under stirring; Urea was slowly added into the reactor under stirring.

[0011] As a further solution of the present invention: in step 3: slowly adding borax into the reaction kettle under stirring; Rare earth nitrate is slowly added into the reaction kettle under stirring.

[0012] As a further solution of the present invention, the weight ratio of the water, the potassium dihydrogen phosphate, the potassium hydroxide, the urea, the borax, the rare earth nitrate, the specially prepared potassium humate and the solid tyvalosin is 700: 350-400: 100-200: 100-150: 20-50: 5-10: 50-100: 20-60.

[0013] As a further solution of the present invention: a method for preparing special potassium humate, specifically comprising: The raw material containing humic acid is crushed into at least 20 meshes, and 2 molar sulfuric acid is added under stirring with water to make the pH value reach 3.0-3.2; potassium permanganate is added under stirring, and the temperature is raised to 55-60°C; after stirring and reacting for at least 2 hours, 35% potassium hydroxide liquid is added, and the temperature is raised to 70-80°C to make the pH value reach 8.5-9.5; after reacting for at least 0.5 hour, the upper clear layer of the reactant is taken out and dried to obtain the special potassium humate.

[0014] As a further solution of the present invention: the weight ratio of the humic acid-containing raw material, the potassium permanganate and the water is 100:8-10:500-600.

[0015] The beneficial effects of the present invention are as follows: The invention dilutes the tylosin dry powder according to a mass ratio of 1:100-500 to obtain a tylosin finished liquid; aerates and cultures the liquid medium containing starch, yeast powder, soybean powder, yeast extract and inorganic salts; during the fermentation process of tylosin, the pH value rises to about 7.5 at the initial stage of fermentation; firstly, an appropriate amount of acetic acid is added to adjust the pH value; when the pH value drops to 7.3, a mixture of the substrate tylosin dry powder and the inducer is added; after the mixture is added, the pH value begins to rise; and an appropriate amount of glucose solution is added to adjust the pH value. liquid, adjusting the pH value of the fermentation process to be always controlled at 7.00-7.30, and controlling the fermentation time at 36-110 hours to obtain the tyvalosin fermentation liquid; adding water to the reactor, introducing water vapor, controlling the temperature at 50-60° C., slowly adding potassium dihydrogen phosphate to the reactor, mixing and stirring until the potassium dihydrogen phosphate is basically dissolved; slowly adding the special potassium humate to the reactor under stirring; slowly adding the solid tyvalosin to the reactor under stirring to prepare the tyvalosin finished liquid composite liquid fertilizer; Among them, tylosin, also known as acetylisovaleryl tylosin tartrate, helps maintain the patency of the respiratory tract and improve the efficiency of gas exchange by inhibiting respiratory pathogens and changing the intracellular environment. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0017] Embodiment 1 The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to an embodiment of the present invention comprises the following steps: Step 1: diluting the tyvalosin dry powder at a mass ratio of 1:100 to obtain a tyvalosin finished liquid; Step 2: aeration culture is carried out in a liquid culture medium containing starch, yeast powder, soybean powder, yeast paste and inorganic salts. During the fermentation process of tylosin, the pH value will rise to about 7.5 at the initial stage of fermentation. First, an appropriate amount of acetic acid is added to adjust the pH value. When the pH value drops to 7.3, a mixture of substrate tylosin dry powder (800 μg / ml) and inducer (L-leucine and L-valine) is added. After the mixture is added, the pH value begins to rise. An appropriate amount of glucose solution needs to be added to adjust the pH value of the fermentation process so that the pH value is always controlled at 7.00-7.30. The fermentation time is controlled at 36-110 hours to obtain a tylosin fermentation liquid. Among them, tylosin dry powder: L-leucine: L-valine = 10:2:1 (w:w:w); Post-processing steps: Acidification: Use acetic acid to adjust the pH value of the tyvalosin fermentation liquid to 4.6, let it stand for 20 minutes, continue to add acetic acid to adjust the pH to 2.0, let it stand for 45 minutes, then adjust it back to 4.0 with sodium hydroxide and let it stand for 45 minutes; Plate and frame filtration, refiltration: the temperature was raised to 32°C, plate and frame filtration was performed, the filter cloth used for plate and frame filtration was polypropylene, the filtrate obtained was cooled to 25°C, the pH was adjusted to 6.0 with sodium bicarbonate, and nanofiltration was performed to obtain nanofiltrate, wherein the pore size of the nanomembrane was 2nm; Crystallization: cooling the nanofiltrate to 20° C., controlling the stirring speed to 15 r / min, adjusting the pH value to 8.5, and precipitating solid tyvalosin; Step 3: adding water to the reaction kettle, introducing water vapor, controlling the temperature between 50-60° C., slowly adding potassium dihydrogen phosphate to the reaction kettle, and mixing and stirring until the potassium dihydrogen phosphate is basically dissolved; Slowly adding potassium hydroxide into the reactor under stirring; Slowly adding urea into the reactor under stirring; Slowly adding borax into the reactor under stirring; Slowly adding rare earth nitrate into the reactor under stirring; Slowly adding the specially prepared potassium humate into the reactor under stirring; Slowly adding solid tyvalosin into the reactor under stirring to prepare tyvalosin finished liquid composite liquid fertilizer; The weight ratio of the water, the potassium dihydrogen phosphate, the potassium hydroxide, the urea, the borax, the rare earth nitrate, the specially prepared potassium humate and the solid tyvalosin is 700:350:100:100:20:5:50:20. The preparation method of special potassium humate specifically comprises: The raw material containing humic acid is crushed to at least 20 meshes, and 2 molar sulfuric acid is added under stirring with water to make the pH value reach 3.0-3.2; potassium permanganate is added under stirring and the temperature is raised to 55-60°C; after stirring and reacting for at least 2 hours, 35% potassium hydroxide liquid is added and the temperature is raised to 70-80°C to make the pH value reach 8.5-9.5; after reacting for at least 0.5 hour, the upper layer of the reactant is taken out and dried to obtain the special potassium humate; in the preparation method of the special potassium humate, the weight ratio between the raw material containing humic acid, the potassium permanganate and the water is: 100:8:500.

[0018] Embodiment 2 The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to an embodiment of the present invention comprises the following steps: Step 1: diluting the tyvalosin dry powder at a mass ratio of 1:300 to obtain a tyvalosin finished liquid; Step 2: aeration culture is carried out in a liquid culture medium containing starch, yeast powder, soybean powder, yeast paste and inorganic salts. During the fermentation process of tylosin, the pH value will rise to about 7.5 at the initial stage of fermentation. First, an appropriate amount of acetic acid is added to adjust the pH value. When the pH value drops to 7.3, a mixture of substrate tylosin dry powder (800 μg / ml) and inducer (L-leucine and L-valine) is added. After the mixture is added, the pH value begins to rise. An appropriate amount of glucose solution needs to be added to adjust the pH value of the fermentation process so that the pH value is always controlled at 7.00-7.30. The fermentation time is controlled at 36-110 hours to obtain a tylosin fermentation liquid. Among them, tylosin dry powder: L-leucine: L-valine = 10:2:1 (w:w:w); Post-processing steps: Acidification: Use acetic acid to adjust the pH value of the tyvalosin fermentation liquid to 4.6, let it stand for 20 minutes, continue to add acetic acid to adjust the pH to 2.0, let it stand for 45 minutes, then adjust it back to 4.0 with sodium hydroxide and let it stand for 45 minutes; Plate and frame filtration, refiltration: the temperature was raised to 32°C, plate and frame filtration was performed, the filter cloth used for plate and frame filtration was polypropylene, the filtrate obtained was cooled to 25°C, the pH was adjusted to 6.0 with sodium bicarbonate, and nanofiltration was performed to obtain nanofiltrate, wherein the pore size of the nanomembrane was 2nm; Crystallization: cooling the nanofiltrate to 20° C., controlling the stirring speed to 15 r / min, adjusting the pH value to 8.5, and precipitating solid tyvalosin; Step 3: adding water to the reaction kettle, introducing water vapor, controlling the temperature between 50-60° C., slowly adding potassium dihydrogen phosphate to the reaction kettle, and mixing and stirring until the potassium dihydrogen phosphate is basically dissolved; Slowly adding potassium hydroxide into the reactor under stirring; Slowly adding urea into the reactor under stirring; Slowly adding borax into the reactor under stirring; Slowly adding rare earth nitrate into the reactor under stirring; Slowly adding the specially prepared potassium humate into the reactor under stirring; Slowly adding solid tyvalosin into the reactor under stirring to prepare tyvalosin finished liquid composite liquid fertilizer; The weight ratio of the water, the potassium dihydrogen phosphate, the potassium hydroxide, the urea, the borax, the rare earth nitrate, the specially prepared potassium humate and the solid tyvalosin is 700:380:150:120:30:8:70:40. The preparation method of special potassium humate specifically comprises: The raw material containing humic acid is crushed to at least 20 meshes, and 2 molar sulfuric acid is added under stirring with water to make the pH value reach 3.0-3.2; potassium permanganate is added under stirring and the temperature is raised to 55-60°C; after stirring and reacting for at least 2 hours, 35% potassium hydroxide liquid is added and the temperature is raised to 70-80°C to make the pH value reach 8.5-9.5; after reacting for at least 0.5 hour, the upper layer of the reactant is taken out and dried to obtain the special potassium humate; in the preparation method of the special potassium humate, the weight ratio between the raw material containing humic acid, the potassium permanganate and the water is: 100:9:550.

[0019] Embodiment 3 The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to an embodiment of the present invention comprises the following steps: Step 1: diluting the tyvalosin dry powder at a mass ratio of 1:500 to obtain a tyvalosin finished liquid; Step 2: aeration culture is carried out in a liquid culture medium containing starch, yeast powder, soybean powder, yeast paste and inorganic salts. During the fermentation process of tylosin, the pH value will rise to about 7.5 at the initial stage of fermentation. First, an appropriate amount of acetic acid is added to adjust the pH value. When the pH value drops to 7.3, a mixture of substrate tylosin dry powder (800 μg / ml) and inducer (L-leucine and L-valine) is added. After the mixture is added, the pH value begins to rise. An appropriate amount of glucose solution needs to be added to adjust the pH value of the fermentation process so that the pH value is always controlled at 7.00-7.30. The fermentation time is controlled at 36-110 hours to obtain a tylosin fermentation liquid. Among them, tylosin dry powder: L-leucine: L-valine = 10:2:1 (w:w:w); Post-processing steps: Acidification: Use acetic acid to adjust the pH value of the tyvalosin fermentation liquid to 4.6, let it stand for 20 minutes, continue to add acetic acid to adjust the pH to 2.0, let it stand for 45 minutes, then adjust it back to 4.0 with sodium hydroxide and let it stand for 45 minutes; Plate and frame filtration, refiltration: the temperature was raised to 32°C, plate and frame filtration was performed, the filter cloth used for plate and frame filtration was polypropylene, the filtrate obtained was cooled to 25°C, the pH was adjusted to 6.0 with sodium bicarbonate, and nanofiltration was performed to obtain nanofiltrate, wherein the pore size of the nanomembrane was 2nm; Crystallization: cooling the nanofiltrate to 20° C., controlling the stirring speed to 15 r / min, adjusting the pH value to 8.5, and precipitating solid tyvalosin; Step 3: adding water to the reaction kettle, introducing water vapor, controlling the temperature between 50-60° C., slowly adding potassium dihydrogen phosphate to the reaction kettle, and mixing and stirring until the potassium dihydrogen phosphate is basically dissolved; Slowly adding potassium hydroxide into the reactor under stirring; Slowly adding urea into the reactor under stirring; Slowly adding borax into the reactor under stirring; Slowly adding rare earth nitrate into the reactor under stirring; Slowly adding the specially prepared potassium humate into the reactor under stirring; Slowly adding solid tyvalosin into the reactor under stirring to prepare tyvalosin finished liquid composite liquid fertilizer; The weight ratio of the water, the potassium dihydrogen phosphate, the potassium hydroxide, the urea, the borax, the rare earth nitrate, the specially prepared potassium humate and the solid tyvalosin is 700:400:200:150:50:10:100:60. The preparation method of special potassium humate specifically comprises: The raw material containing humic acid is crushed to at least 20 meshes, and 2 molar sulfuric acid is added under stirring with water to make the pH value reach 3.0-3.2; potassium permanganate is added under stirring and the temperature is raised to 55-60°C; after stirring and reacting for at least 2 hours, 35% potassium hydroxide liquid is added and the temperature is raised to 70-80°C to make the pH value reach 8.5-9.5; after reacting for at least 0.5 hour, the upper layer of the reactant is taken out and dried to obtain the special potassium humate; in the preparation method of the special potassium humate, the weight ratio between the raw material containing humic acid, the potassium permanganate and the water is: 100:10:600.

[0020] Comparative Example 1 Comparative Example 1 adopts the preparation process of a composite liquid fertilizer, comprising the following steps: Add water to the reaction kettle, introduce water vapor, control the temperature between 50-60° C., slowly add potassium dihydrogen phosphate to the reaction kettle, and mix and stir until the potassium dihydrogen phosphate is basically dissolved; Slowly adding potassium hydroxide into the reactor under stirring; Slowly adding urea into the reactor under stirring; Slowly adding borax into the reactor under stirring; Slowly adding rare earth nitrate into the reactor under stirring; Slowly adding the specially prepared potassium humate into the reactor under stirring; Slowly adding solid tyvalosin into the reactor under stirring to prepare tyvalosin finished liquid composite liquid fertilizer; Wherein, the weight ratio among the water, the potassium dihydrogen phosphate, the potassium hydroxide, the urea, the borax, the rare earth nitrate and the special potassium humate is 700:400:200:100:50:10:100.

[0021] Performance Test: The soil air permeability of the composite liquid fertilizers prepared in Examples 1-3 and Comparative Example 1 was tested; The test method is as follows: add the corresponding substances of the control group and the experimental group to the soil, and the weight of the added substances is 5% of the weight of the soil, then stir evenly, and place them naturally for 12 months in the same indoor environment (constant temperature 20℃, relative humidity 40%RH), and then measure the permeability of the soil. The results are shown in the table below:

[0022] It can be seen from the above table that the Tylvalosin finished liquid composite liquid fertilizer of the present invention can improve the permeability of the soil, and its porosity, especially the proportion of non-capillary voids in the total porosity, continues to increase, thereby enhancing the air permeability of the soil.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A process for improving soil air permeability by using tylvalosin finished liquid composite liquid fertilizer, characterized in that: The following steps are involved: Step 1: diluting the tyvalosin dry powder at a mass ratio of 1:100-500 to obtain a tyvalosin finished liquid; Step 2: aeration culture is carried out in a liquid culture medium containing starch, yeast powder, soybean powder, yeast paste and inorganic salts. During the fermentation process of tylosin, the pH value will rise to about 7.5 at the initial stage of fermentation. First, an appropriate amount of acetic acid is added to adjust the pH value. When the pH value drops to 7.3, a mixture of substrate tylosin dry powder and an inducer is added. After the mixture is added, the pH value begins to rise. An appropriate amount of glucose solution needs to be added to adjust the pH value of the fermentation process so that the pH value is always controlled at 7.00-7.

30. The fermentation time is controlled at 36-110 hours to obtain a tylosin fermentation liquid. Step 3: adding water to the reaction kettle, introducing water vapor, controlling the temperature between 50-60° C., slowly adding potassium dihydrogen phosphate to the reaction kettle, and mixing and stirring until the potassium dihydrogen phosphate is basically dissolved; Slowly adding the specially prepared potassium humate into the reactor under stirring; The solid tyvalosin is slowly added into the reaction kettle under stirring to prepare the tyvalosin finished liquid composite liquid fertilizer.

2. The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to claim 1, characterized in that: Tylosin dry powder: L-leucine: L-valine = 10:2:1 (w:w:w).

3. The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to claim 2, characterized in that: Step 2 also includes the following post-processing steps: Acidification: Use acetic acid to adjust the pH value of the tyvalosin fermentation liquid to 4.6, let it stand for 20 minutes, continue to add acetic acid to adjust the pH to 2.0, let it stand for 45 minutes, then adjust it back to 4.0 with sodium hydroxide and let it stand for 45 minutes.

4. The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to claim 3, characterized in that: Post-processing also includes the following steps: Plate and frame filtration and refiltration: The temperature is raised to 32°C and plate and frame filtration is performed. The filter cloth used for plate and frame filtration is polypropylene. The filtrate obtained is cooled to 25°C, and after the pH is adjusted to 6.0 with sodium bicarbonate, nanofiltration is performed to obtain the nanofiltrate, in which the pore size of the nanomembrane is 2nm.

5. The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to claim 4, characterized in that: Post-processing also includes the following steps: Crystallization: cool the nanofiltrate to 20° C., control the stirring speed to 15 r / min, adjust the pH value to 8.5, and precipitate solid tyvalocin.

6. The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to claim 5, characterized in that: In step 3: slowly adding potassium hydroxide into the reactor under stirring; Urea was slowly added into the reactor under stirring.

7. The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to claim 6, characterized in that: In step 3: slowly adding borax into the reaction kettle under stirring; Rare earth nitrate is slowly added into the reaction kettle under stirring.

8. The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to claim 7, characterized in that: The weight ratio of the water, the potassium dihydrogen phosphate, the potassium hydroxide, the urea, the borax, the rare earth nitrate, the special potassium humate and the solid tyvalosin is 700: 350-400: 100-200: 100-150: 20-50: 5-10: 50-100: 20-60.

9. The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to claim 8, characterized in that: The preparation method of special potassium humate specifically comprises: The raw material containing humic acid is crushed into at least 20 meshes, and 2 molar sulfuric acid is added under stirring with water to make the pH value reach 3.0-3.2; potassium permanganate is added under stirring, and the temperature is raised to 55-60°C; after stirring and reacting for at least 2 hours, 35% potassium hydroxide liquid is added, and the temperature is raised to 70-80°C to make the pH value reach 8.5-9.5; after reacting for at least 0.5 hour, the upper clear layer of the reactant is taken out and dried to obtain the special potassium humate.

10. The process for improving soil air permeability by using a tyvalosin finished liquid composite liquid fertilizer according to claim 9, characterized in that: The weight ratio of the humic acid-containing raw material, the potassium permanganate and the water is 100:8-10:500-600.

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