Preparation process of strip-shaped compound fertilizer

Abstract

The invention discloses a preparation process of a strip-shaped compound fertilizer, and relates to the field of compound fertilizer preparation, and the strip-shaped compound fertilizer comprises the following components in parts by weight: 10-15 parts of needle-shaped crystal urea, 0.2-0.8 part of magnesium sulfate, 0.1-1.6 parts of citric acid, 8-12 parts of a phosphorus source, 8-13 parts of a potassium source, 10-20 parts of a filler and 10-20 parts of a compound fermentation product. The filler is strip-shaped and can be used for preparing a strip-shaped compound fertilizer, so that nutritional ingredients contained in the compound fertilizer can be gradually released when the compound fertilizer is applied to soil, the nutritional ingredients are not prone to being greatly lost along with the phenomenon of water and soil loss, and the continuous supply capacity of the nutritional ingredients in the compound fertilizer is improved.

Description

Technical Field

[0001] The invention relates to the field of compound fertilizer preparation, in particular to a process for preparing strip-shaped compound fertilizer. Background Art

[0002] Compound fertilizer refers to chemical fertilizer containing two or more nutrient elements of nitrogen, phosphorus and potassium. Compound fertilizer has the advantages of high nutrient content, few by-components and good physical properties. It plays a very important role in balanced fertilization, improving fertilizer utilization and promoting high and stable yields of crops.

[0003] However, compound fertilizers applied to the soil usually only work for 0.5-1 year, and the nutrients are easily released quickly with soil erosion, and the continuous supply of nutrients is insufficient.

[0004] Therefore, it is necessary to propose a strip compound fertilizer preparation process to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a strip compound fertilizer preparation process to solve the problem that compound fertilizer applied in the soil usually can only act for 0.5-1 year, nutrients are easily released quickly with soil erosion, and the continuous supply capacity of nutrients is insufficient.

[0006] To achieve the above object, the present invention provides the following technical scheme: a process for preparing strip-shaped compound fertilizer, comprising the following components by weight: 10-15 parts of needle-shaped crystalline urea, 0.2-0.8 parts of magnesium sulfate, 0.1-1.6 parts of citric acid, 8-12 parts of phosphorus source, 8-13 parts of potassium source, 10-20 parts of filler, and 10-20 parts of compound fermentation product;

[0007] The strip-shaped compound fertilizer preparation process comprises the following steps:

[0008] S1: preparing material A, mixing needle-shaped crystalline urea, magnesium sulfate, citric acid, a phosphorus source, and a potassium source to form material A;

[0009] S2: Making fillers, preparing soil, water, yeast, and glucose, firstly, fully mixing soil, water, yeast, and glucose, and aerobically fermenting them for 1-2 hours at a temperature of 20-40° C. and a humidity of 60-80%, to form a filler model after fermentation, wherein the inner layer structure of the filler model has a pore structure formed by fermentation, and then drying and shaping the filler model to form a filler;

[0010] S3: preparing a composite fermentation product, crushing and mixing 1.3-2.5 parts by weight of rice straw, 2-3.4 parts by weight of glucose, 1.8-4.2 parts by weight of corn straw and 0.5-1.5 parts by weight of root enzyme bacteria, placing them at a temperature of 20-40° C. and a humidity of 60-80% for 0.5-1 h, then heating them to 30-45° C., adjusting the pH to 5.5-8.5, reacting for 0.5-1 day, cooling them to room temperature and drying them to obtain a composite fermentation product;

[0011] S4: Preparation of strip-shaped compound fertilizer: firstly, material A and the compound fermentation product are fully mixed with water, and then the mixed slurry and the filler are stirred so that the mixed slurry is fully filled or coated in the inner and outer layer structures of the filler to obtain strip-shaped compound fertilizer.

[0012] Preferably, the following components are included in parts by weight: 10 parts of needle-shaped crystalline urea, 0.2 parts of magnesium sulfate, 0.1 parts of citric acid, 8 parts of phosphorus source, 8 parts of potassium source, 10 parts of filler, and 10 parts of composite fermentation product.

[0013] Preferably, the following components are included in parts by weight: 12 parts of needle-shaped crystalline urea, 0.4 parts of magnesium sulfate, 0.8 parts of citric acid, 10 parts of phosphorus source, 9 parts of potassium source, 13 parts of filler, and 13 parts of composite fermentation product.

[0014] Preferably, the following components are included in parts by weight: 14 parts of needle-shaped crystalline urea, 0.7 parts of magnesium sulfate, 1.3 parts of citric acid, 11 parts of phosphorus source, 12 parts of potassium source, 18 parts of filler, and 18 parts of composite fermentation product.

[0015] Preferably, the following components are included in parts by weight: 15 parts of needle-shaped crystalline urea, 0.8 parts of magnesium sulfate, 1.6 parts of citric acid, 12 parts of phosphorus source, 13 parts of potassium source, 20 parts of filler, and 20 parts of composite fermentation product.

[0016] Preferably, the soil is yellow soil.

[0017] Preferably, the ultrasonic wave is generated by an ultrasonic generator, the ultrasonic wave frequency generated by the ultrasonic generator is 30-50kHz, and the power of the ultrasonic generator is 200-300W.

[0018] Preferably, the mixed slurry and the filler are stirred under pressure in S4, and the pressure condition is 0.1-0.8 MPa.

[0019] Preferably, the shape of the filler includes but is not limited to strips and blocks.

[0020] Technical effects and advantages of the present invention:

[0021] 1. The filler is in the shape of strips, which can be used to prepare strip compound fertilizers. When the compound fertilizers are applied to the soil, the nutrients they contain can be gradually released, and they are not easily lost in large quantities due to soil erosion, thus improving the continuous supply capacity of the nutrients in the compound fertilizers.

[0022] 2. The filler prepared in the present invention is mainly used to carry and attach material A and the composite fermentation product, so that the nutrients formed by material A and the composite fermentation product can be fully filled or coated in the inner and outer layer structures of the filler, and the nutrients in the outer layer structure of the filler can be gradually released into the soil. When the nutrients in the outer layer structure of the filler are completely released, the water in the soil enters and exits the inner layer structure of the filler, and the nutrients in the inner layer structure of the filler are gradually transferred to the soil, so that the continuous supply capacity of the nutrients of the strip compound fertilizer is improved, and when it rains, because the nutrients are stored in the inner layer structure of the filler, therefore, on rainy days, only a part of the nutrients in the filler will be lost, reducing the phenomenon of large-scale loss of nutrients;

[0023] 3. Glucose provides yeast with the energy required for fermentation. After fermentation, yeast produces carbon dioxide, thereby forming a pore structure in the soil. When the filler model is formed, it is dried to form a shaped filler, so that the filler layer structure has a pore structure. The pore structure can be used to carry related nutrients such as material A and compound fermentation products, so that the nutrients in the strip compound fertilizer are effectively preserved;

[0024] 4. The composite fermentation product of the present invention is fermented and ultrasonically treated with rice straw, glucose, corn straw and root enzyme bacteria under appropriate conditions. The obtained composite fermentation product is rich in amino acids related to the metabolism of crops and other plants, so that the strip-shaped compound fertilizer has a slow-release property and excellent adsorption capacity. At the same time, it can promote the absorption of nutrients and water by crops and other plants, and improve the cold resistance of crops. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a process diagram for preparing the strip-shaped compound fertilizer of the present invention. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1, the present invention provides as Figure 1The strip compound fertilizer preparation process shown includes the following components by weight: 10 parts of needle-shaped crystalline urea, 0.2 parts of magnesium sulfate, 0.1 parts of citric acid, 8 parts of phosphorus source, 8 parts of potassium source, 10 parts of filler, and 10 parts of compound fermentation product;

[0028] The shape of the filler in the present invention includes but is not limited to strips and blocks. In this embodiment, the filler is in the shape of strips, which can be used to prepare strip-shaped compound fertilizers, so that when the compound fertilizers are applied to the soil, the nutrients contained therein can be gradually released, and they are not easily lost in large quantities due to soil erosion, thereby improving the continuous supply capacity of the nutrients in the compound fertilizers.

[0029] In actual operation, the strip compound fertilizer is cylindrical, 1-3CM in length and 0.5-1CM in diameter. The strip compound fertilizer can be buried in the soil by landfill. The nutrients on the strip compound fertilizer will gradually transfer to the soil from the outside to the inside, thereby supplying the growth needs of crops.

[0030] Furthermore, the length and diameter of the strip compound fertilizer can be adjusted according to actual needs, so that the continuous supply capacity of the nutrients in the strip compound fertilizer can be further improved, which can last for up to 3-6 years.

[0031] The strip compound fertilizer preparation process comprises the following steps:

[0032] S1: preparing material A, mixing needle-shaped crystalline urea, magnesium sulfate, citric acid, a phosphorus source, and a potassium source to form material A;

[0033] S2: Making fillers, preparing soil, water, yeast, and glucose, firstly, fully mixing soil, water, yeast, and glucose, and aerobically fermenting them for 1-2 hours at a temperature of 20-40° C. and a humidity of 60-80%, to form a filler model after fermentation, wherein the inner layer structure of the filler model has a pore structure formed by fermentation, and then drying and shaping the filler model to form a filler;

[0034] S3: preparing a composite fermentation product, crushing and mixing 1.3-2.5 parts by weight of rice straw, 2-3.4 parts by weight of glucose, 1.8-4.2 parts by weight of corn straw and 0.5-1.5 parts by weight of root enzyme bacteria respectively, placing them under a temperature condition of 20-40° C. and a humidity condition of 60-80%, ultrasonically pre-treating them for 0.5-1 h, then heating them to 30-45° C., adjusting the pH to 5.5-8.5, reacting them for 0.5-1 day, cooling them to room temperature and drying them to obtain a composite fermentation product, wherein the ultrasonic wave is generated by an ultrasonic generator, the ultrasonic wave frequency generated by the ultrasonic generator is 30-50 kHz, and the power of the ultrasonic generator is 200-300 W;

[0035] S4: Preparation of strip compound fertilizer. First, add water to material A and the compound fermentation product and mix them thoroughly. Then, stir the mixed slurry and the filler so that the mixed slurry is fully filled or coated in the inner and outer layer structures of the filler to obtain strip compound fertilizer. In S4, the mixed slurry and the filler are stirred under pressure at a pressure of 0.1-0.8MPa.

[0036] The filler produced in the present invention is mainly used to carry and attach material A and the composite fermentation product, so that the nutrients formed by material A and the composite fermentation product can be fully filled or coated in the inner and outer layer structures of the filler, and the nutrients in the outer layer structure of the filler can be gradually released into the soil. After the nutrients in the outer layer structure of the filler are released, the moisture in the soil enters and exits the inner layer structure of the filler, and the nutrients in the inner layer structure of the filler are gradually transferred to the soil, so that the continuous supply capacity of the nutrients of the strip compound fertilizer is improved, and when it rains, since the nutrients are stored in the inner layer structure of the filler, therefore, on rainy days, only a part of the nutrients in the filler will be lost, reducing the phenomenon of large-scale loss of nutrients.

[0037] The soil used in the filler of the present invention is yellow soil, which is safe and pollution-free and will not cause other effects on crops when fertilizing.

[0038] The specific principle of the pore structure formed by fermentation in the internal layer structure of the filler model is: based on the mutual mixing of soil, water, yeast and glucose, fermentation is carried out under suitable conditions. Glucose provides the yeast with the energy required for fermentation. The yeast produces carbon dioxide after fermentation, thereby forming a pore structure in the soil. When the filler model is formed and then dried, a shaped filler can be formed, so that the layer structure of the filler has a pore structure. The pore structure can be used to carry related nutrients such as material A and compound fermentation products, so that the nutrients in the strip compound fertilizer are effectively preserved.

[0039] The composite fermentation product of the present invention is fermented and ultrasonically treated with rice straw, glucose, corn straw and root enzyme bacteria under appropriate conditions, and the obtained composite fermentation product is rich in amino acids related to the metabolism of crops and other plants, so that the strip-shaped composite fertilizer has a slow-release performance and excellent adsorption capacity, and can also promote the absorption of nutrients and water by crops and other plants, thereby improving the cold resistance of crops.

[0040] Embodiment 2, the present invention provides as Figure 1 The strip compound fertilizer preparation process shown includes the following components by weight: 12 parts of needle-shaped crystalline urea, 0.4 parts of magnesium sulfate, 0.8 parts of citric acid, 10 parts of phosphorus source, 9 parts of potassium source, 13 parts of filler, and 13 parts of compound fermentation product;

[0041] The shape of the filler in the present invention includes but is not limited to strips and blocks. In this embodiment, the filler is in the shape of strips, which can be used to prepare strip-shaped compound fertilizers, so that when the compound fertilizers are applied to the soil, the nutrients contained therein can be gradually released, and they are not easily lost in large quantities due to soil erosion, thereby improving the continuous supply capacity of the nutrients in the compound fertilizers.

[0042] In actual operation, the strip compound fertilizer is cylindrical, 1-3CM in length and 0.5-1CM in diameter. The strip compound fertilizer can be buried in the soil by landfill. The nutrients on the strip compound fertilizer will gradually transfer to the soil from the outside to the inside, thereby supplying the growth needs of crops.

[0043] Furthermore, the length and diameter of the strip compound fertilizer can be adjusted according to actual needs, so that the continuous supply capacity of the nutrients in the strip compound fertilizer can be further improved, which can last for up to 3-6 years.

[0044] The strip compound fertilizer preparation process comprises the following steps:

[0045] S1: preparing material A, mixing needle-shaped crystalline urea, magnesium sulfate, citric acid, a phosphorus source, and a potassium source to form material A;

[0046] S2: Making fillers, preparing soil, water, yeast, and glucose, firstly, fully mixing soil, water, yeast, and glucose, and aerobically fermenting them for 1-2 hours at a temperature of 20-40° C. and a humidity of 60-80%, to form a filler model after fermentation, wherein the inner layer structure of the filler model has a pore structure formed by fermentation, and then drying and shaping the filler model to form a filler;

[0047] S3: preparing a composite fermentation product, crushing and mixing 1.3-2.5 parts by weight of rice straw, 2-3.4 parts by weight of glucose, 1.8-4.2 parts by weight of corn straw and 0.5-1.5 parts by weight of root enzyme bacteria respectively, placing them under a temperature condition of 20-40° C. and a humidity condition of 60-80%, ultrasonically pre-treating them for 0.5-1 h, then heating them to 30-45° C., adjusting the pH to 5.5-8.5, reacting them for 0.5-1 day, cooling them to room temperature and drying them to obtain a composite fermentation product, wherein the ultrasonic wave is generated by an ultrasonic generator, the ultrasonic wave frequency generated by the ultrasonic generator is 30-50 kHz, and the power of the ultrasonic generator is 200-300 W;

[0048] S4: Preparation of strip compound fertilizer. First, add water to material A and the compound fermentation product and mix them thoroughly. Then, stir the mixed slurry and the filler so that the mixed slurry is fully filled or coated in the inner and outer layer structures of the filler to obtain strip compound fertilizer. In S4, the mixed slurry and the filler are stirred under pressure at a pressure of 0.1-0.8MPa.

[0049] The filler produced in the present invention is mainly used to carry and attach material A and the composite fermentation product, so that the nutrients formed by material A and the composite fermentation product can be fully filled or coated in the inner and outer layer structures of the filler, and the nutrients in the outer layer structure of the filler can be gradually released into the soil. After the nutrients in the outer layer structure of the filler are released, the moisture in the soil enters and exits the inner layer structure of the filler, and the nutrients in the inner layer structure of the filler are gradually transferred to the soil, so that the continuous supply capacity of the nutrients of the strip compound fertilizer is improved, and when it rains, since the nutrients are stored in the inner layer structure of the filler, therefore, on rainy days, only a part of the nutrients in the filler will be lost, reducing the phenomenon of large-scale loss of nutrients.

[0050] The soil used in the filler of the present invention is yellow soil, which is safe and pollution-free and will not cause other effects on crops when fertilizing.

[0051] The specific principle of the pore structure formed by fermentation in the internal layer structure of the filler model is: based on the mutual mixing of soil, water, yeast and glucose, fermentation is carried out under suitable conditions. Glucose provides the yeast with the energy required for fermentation. The yeast produces carbon dioxide after fermentation, thereby forming a pore structure in the soil. When the filler model is formed and then dried, a shaped filler can be formed, so that the layer structure of the filler has a pore structure. The pore structure can be used to carry related nutrients such as material A and compound fermentation products, so that the nutrients in the strip compound fertilizer are effectively preserved.

[0052] The composite fermentation product of the present invention is fermented and ultrasonically treated with rice straw, glucose, corn straw and root enzyme bacteria under appropriate conditions, and the obtained composite fermentation product is rich in amino acids related to the metabolism of crops and other plants, so that the strip-shaped composite fertilizer has a slow-release performance and excellent adsorption capacity, and can also promote the absorption of nutrients and water by crops and other plants, thereby improving the cold resistance of crops.

[0053] Embodiment 3, the present invention provides as Figure 1 The strip compound fertilizer preparation process shown includes the following components by weight: 14 parts of needle-shaped crystalline urea, 0.7 parts of magnesium sulfate, 1.3 parts of citric acid, 11 parts of phosphorus source, 12 parts of potassium source, 18 parts of filler, and 18 parts of compound fermentation product;

[0054] The shape of the filler in the present invention includes but is not limited to strips and blocks. In this embodiment, the filler is in the shape of strips, which can be used to prepare strip-shaped compound fertilizers, so that when the compound fertilizers are applied to the soil, the nutrients contained therein can be gradually released, and they are not easily lost in large quantities due to soil erosion, thereby improving the continuous supply capacity of the nutrients in the compound fertilizers.

[0055] In actual operation, the strip compound fertilizer is cylindrical, 1-3CM in length and 0.5-1CM in diameter. The strip compound fertilizer can be buried in the soil by landfill. The nutrients on the strip compound fertilizer will gradually transfer to the soil from the outside to the inside, thereby supplying the growth needs of crops.

[0056] Furthermore, the length and diameter of the strip compound fertilizer can be adjusted according to actual needs, so that the continuous supply capacity of the nutrients in the strip compound fertilizer can be further improved, which can last for up to 3-6 years.

[0057] The strip compound fertilizer preparation process comprises the following steps:

[0058] S1: preparing material A, mixing needle-shaped crystalline urea, magnesium sulfate, citric acid, a phosphorus source, and a potassium source to form material A;

[0059] S2: Making fillers, preparing soil, water, yeast, and glucose, firstly, fully mixing soil, water, yeast, and glucose, and aerobically fermenting them for 1-2 hours at a temperature of 20-40° C. and a humidity of 60-80%, to form a filler model after fermentation, wherein the inner layer structure of the filler model has a pore structure formed by fermentation, and then drying and shaping the filler model to form a filler;

[0060] S3: preparing a composite fermentation product, crushing and mixing 1.3-2.5 parts by weight of rice straw, 2-3.4 parts by weight of glucose, 1.8-4.2 parts by weight of corn straw and 0.5-1.5 parts by weight of root enzyme bacteria respectively, placing them under a temperature condition of 20-40° C. and a humidity condition of 60-80%, ultrasonically pre-treating them for 0.5-1 h, then heating them to 30-45° C., adjusting the pH to 5.5-8.5, reacting them for 0.5-1 day, cooling them to room temperature and drying them to obtain a composite fermentation product, wherein the ultrasonic wave is generated by an ultrasonic generator, the ultrasonic wave frequency generated by the ultrasonic generator is 30-50 kHz, and the power of the ultrasonic generator is 200-300 W;

[0061] S4: Preparation of strip compound fertilizer. First, add water to material A and the compound fermentation product and mix them thoroughly. Then, stir the mixed slurry and the filler so that the mixed slurry is fully filled or coated in the inner and outer layer structures of the filler to obtain strip compound fertilizer. In S4, the mixed slurry and the filler are stirred under pressure at a pressure of 0.1-0.8MPa.

[0062] The filler produced in the present invention is mainly used to carry and attach material A and the composite fermentation product, so that the nutrients formed by material A and the composite fermentation product can be fully filled or coated in the inner and outer layer structures of the filler, and the nutrients in the outer layer structure of the filler can be gradually released into the soil. After the nutrients in the outer layer structure of the filler are released, the moisture in the soil enters and exits the inner layer structure of the filler, and the nutrients in the inner layer structure of the filler are gradually transferred to the soil, so that the continuous supply capacity of the nutrients of the strip compound fertilizer is improved, and when it rains, since the nutrients are stored in the inner layer structure of the filler, therefore, on rainy days, only a part of the nutrients in the filler will be lost, reducing the phenomenon of large-scale loss of nutrients.

[0063] The soil used in the filler of the present invention is yellow soil, which is safe and pollution-free and will not cause other effects on crops when fertilizing.

[0064] The specific principle of the pore structure formed by fermentation in the internal layer structure of the filler model is: based on the mutual mixing of soil, water, yeast and glucose, fermentation is carried out under suitable conditions. Glucose provides the yeast with the energy required for fermentation. The yeast produces carbon dioxide after fermentation, thereby forming a pore structure in the soil. When the filler model is formed and then dried, a shaped filler can be formed, so that the layer structure of the filler has a pore structure. The pore structure can be used to carry related nutrients such as material A and compound fermentation products, so that the nutrients in the strip compound fertilizer are effectively preserved.

[0065] The composite fermentation product of the present invention is fermented and ultrasonically treated with rice straw, glucose, corn straw and root enzyme bacteria under appropriate conditions, and the obtained composite fermentation product is rich in amino acids related to the metabolism of crops and other plants, so that the strip-shaped composite fertilizer has a slow-release performance and excellent adsorption capacity, and can also promote the absorption of nutrients and water by crops and other plants, thereby improving the cold resistance of crops.

[0066] Embodiment 4, the present invention provides as Figure 1 The strip compound fertilizer preparation process shown includes the following components by weight: 15 parts of needle-shaped crystalline urea, 0.8 parts of magnesium sulfate, 1.6 parts of citric acid, 12 parts of phosphorus source, 13 parts of potassium source, 20 parts of filler, and 20 parts of compound fermentation product;

[0067] The shape of the filler in the present invention includes but is not limited to strips and blocks. In this embodiment, the filler is in the shape of strips, which can be used to prepare strip-shaped compound fertilizers, so that when the compound fertilizers are applied to the soil, the nutrients contained therein can be gradually released, and they are not easily lost in large quantities due to soil erosion, thereby improving the continuous supply capacity of the nutrients in the compound fertilizers.

[0068] In actual operation, the strip compound fertilizer is cylindrical, 1-3CM in length and 0.5-1CM in diameter. The strip compound fertilizer can be buried in the soil by landfill. The nutrients on the strip compound fertilizer will gradually transfer to the soil from the outside to the inside, thereby supplying the growth needs of crops.

[0069] Furthermore, the length and diameter of the strip compound fertilizer can be adjusted according to actual needs, so that the continuous supply capacity of the nutrients in the strip compound fertilizer can be further improved, which can last for up to 3-6 years.

[0070] The strip compound fertilizer preparation process comprises the following steps:

[0071] S1: preparing material A, mixing needle-shaped crystalline urea, magnesium sulfate, citric acid, a phosphorus source, and a potassium source to form material A;

[0072] S2: Making fillers, preparing soil, water, yeast, and glucose, firstly, fully mixing soil, water, yeast, and glucose, and aerobically fermenting them for 1-2 hours at a temperature of 20-40° C. and a humidity of 60-80%, to form a filler model after fermentation, wherein the inner layer structure of the filler model has a pore structure formed by fermentation, and then drying and shaping the filler model to form a filler;

[0073] S3: preparing a composite fermentation product, crushing and mixing 1.3-2.5 parts by weight of rice straw, 2-3.4 parts by weight of glucose, 1.8-4.2 parts by weight of corn straw and 0.5-1.5 parts by weight of root enzyme bacteria respectively, placing them under a temperature condition of 20-40° C. and a humidity condition of 60-80%, ultrasonically pre-treating them for 0.5-1 h, then heating them to 30-45° C., adjusting the pH to 5.5-8.5, reacting them for 0.5-1 day, cooling them to room temperature and drying them to obtain a composite fermentation product, wherein the ultrasonic wave is generated by an ultrasonic generator, the ultrasonic wave frequency generated by the ultrasonic generator is 30-50 kHz, and the power of the ultrasonic generator is 200-300 W;

[0074] S4: Preparation of strip compound fertilizer. First, add water to material A and the compound fermentation product and mix them thoroughly. Then, stir the mixed slurry and the filler so that the mixed slurry is fully filled or coated in the inner and outer layer structures of the filler to obtain strip compound fertilizer. In S4, the mixed slurry and the filler are stirred under pressure at a pressure of 0.1-0.8MPa.

[0075] The filler produced in the present invention is mainly used to carry and attach material A and the composite fermentation product, so that the nutrients formed by material A and the composite fermentation product can be fully filled or coated in the inner and outer layer structures of the filler, and the nutrients in the outer layer structure of the filler can be gradually released into the soil. After the nutrients in the outer layer structure of the filler are released, the moisture in the soil enters and exits the inner layer structure of the filler, and the nutrients in the inner layer structure of the filler are gradually transferred to the soil, so that the continuous supply capacity of the nutrients of the strip compound fertilizer is improved, and when it rains, since the nutrients are stored in the inner layer structure of the filler, therefore, on rainy days, only a part of the nutrients in the filler will be lost, reducing the phenomenon of large-scale loss of nutrients.

[0076] The soil used in the filler of the present invention is yellow soil, which is safe and pollution-free and will not cause other effects on crops when fertilizing.

[0077] The specific principle of the pore structure formed by fermentation in the internal layer structure of the filler model is: based on the mutual mixing of soil, water, yeast and glucose, fermentation is carried out under suitable conditions. Glucose provides the yeast with the energy required for fermentation. The yeast produces carbon dioxide after fermentation, thereby forming a pore structure in the soil. When the filler model is formed and then dried, a shaped filler can be formed, so that the layer structure of the filler has a pore structure. The pore structure can be used to carry related nutrients such as material A and compound fermentation products, so that the nutrients in the strip compound fertilizer are effectively preserved.

[0078] The composite fermentation product of the present invention is fermented and ultrasonically treated with rice straw, glucose, corn straw and root enzyme bacteria under appropriate conditions, and the obtained composite fermentation product is rich in amino acids related to the metabolism of crops and other plants, so that the strip-shaped composite fertilizer has a slow-release performance and excellent adsorption capacity, and can also promote the absorption of nutrients and water by crops and other plants, thereby improving the cold resistance of crops.

Claims

1. A process for preparing strip-shaped compound fertilizer, characterized in that: The following components are included in parts by weight: 10-15 parts of needle-shaped crystalline urea, 0.2-0.8 parts of magnesium sulfate, 0.1-1.6 parts of citric acid, 8-12 parts of phosphorus source, 8-13 parts of potassium source, 10-20 parts of filler, and 10-20 parts of composite fermentation product; The strip-shaped compound fertilizer preparation process comprises the following steps: S1: preparing material A, mixing needle-shaped crystalline urea, magnesium sulfate, citric acid, a phosphorus source, and a potassium source to form material A; S2: Making fillers, preparing soil, water, yeast, and glucose, firstly, fully mixing soil, water, yeast, and glucose, and aerobically fermenting them for 1-2 hours at a temperature of 20-40° C. and a humidity of 60-80%, to form a filler model after fermentation, wherein the inner layer structure of the filler model has a pore structure formed by fermentation, and then drying and shaping the filler model to form a filler; S3: preparing a composite fermentation product, crushing and mixing 1.3-2.5 parts by weight of rice straw, 2-3.4 parts by weight of glucose, 1.8-4.2 parts by weight of corn straw and 0.5-1.5 parts by weight of root enzyme bacteria, placing them at a temperature of 20-40° C. and a humidity of 60-80% for 0.5-1 h, then heating them to 30-45° C., adjusting the pH to 5.5-8.5, reacting for 0.5-1 day, cooling them to room temperature and drying them to obtain a composite fermentation product; S4: Preparation of strip-shaped compound fertilizer: firstly, material A and the compound fermentation product are fully mixed with water, and then the mixed slurry and the filler are stirred so that the mixed slurry is fully filled or coated in the inner and outer layer structures of the filler to obtain strip-shaped compound fertilizer.

2. The process for preparing strip-shaped compound fertilizer according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 10 parts of needle-shaped crystalline urea, 0.2 parts of magnesium sulfate, 0.1 parts of citric acid, 8 parts of phosphorus source, 8 parts of potassium source, 10 parts of filler and 10 parts of composite fermentation product.

3. The process for preparing the strip-shaped compound fertilizer according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 12 parts of needle-shaped crystalline urea, 0.4 parts of magnesium sulfate, 0.8 parts of citric acid, 10 parts of phosphorus source, 9 parts of potassium source, 13 parts of filler and 13 parts of composite fermentation product.

4. The process for preparing the strip-shaped compound fertilizer according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 14 parts of needle-shaped crystalline urea, 0.7 parts of magnesium sulfate, 1.3 parts of citric acid, 11 parts of phosphorus source, 12 parts of potassium source, 18 parts of filler and 18 parts of composite fermentation product.

5. The process for preparing the strip-shaped compound fertilizer according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 15 parts of needle-shaped crystalline urea, 0.8 parts of magnesium sulfate, 1.6 parts of citric acid, 12 parts of phosphorus source, 13 parts of potassium source, 20 parts of filler and 20 parts of composite fermentation product.

6. The process for preparing strip-shaped compound fertilizer according to claim 1, characterized in that: The soil is yellow soil.

7. The process for preparing strip-shaped compound fertilizer according to claim 1, characterized in that: The ultrasonic wave is generated by an ultrasonic generator, the ultrasonic wave frequency generated by the ultrasonic generator is 30-50kHz, and the power of the ultrasonic generator is 200-300W.

8. The process for preparing strip-shaped compound fertilizer according to claim 1, characterized in that: The mixed slurry and the filler are stirred under pressure in S4, and the pressure condition is 0.1-0.8MPa.

9. The process for preparing strip-shaped compound fertilizer according to claim 1, characterized in that: The shape of the filler includes but is not limited to strips and blocks.

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