Water-fertilizer integrated water-soluble fertilizer for cotton and preparation method thereof

Abstract

The invention relates to the technical field of agricultural biology, in particular to water-fertilizer integrated water-soluble fertilizer for cotton and a preparation method. Compound amino acid, a humic acid-fulvic acid compound, a medium trace element chelating system, a zinc-graphene compound, an alginate oligosaccharide-gamma-aminobutyric acid compound, a compound microbial agent, nano titanium dioxide, sodium 2-naphthoxyacetate and a soil conditioner are scientifically proportioned; the water-soluble fertilizer with multiple functions of comprehensive nutrient supply, biological stimulation, soil improvement and the like is prepared. In the preparation process, a spray freeze drying technology is adopted to ensure that the retention rate of active ingredients is greater than or equal to 95%, and then twin-screw extrusion granulation and screening are performed to finally obtain the fertilizer. In this way, the technical problem that in the prior art, the fertilizer only pays attention to providing basic major elements such as nitrogen, phosphorus and potassium, and neglects the important effect of microelements on cotton growth, so that the requirement of modern cotton planting for fertilizer multifunctionality is difficult to meet is solved.

Description

Technical Field

[0001] The present invention relates to the field of agricultural biotechnology, in particular to a water-soluble fertilizer for cotton integrated with water and fertilizer and a preparation method thereof. Background Art

[0002] As one of the world's most important cash crops, cotton's yield and quality are directly linked to the raw material supply for the textile industry and farmers' economic benefits. During cotton cultivation, effective fertilization is a key measure to improve cotton yield and quality. Traditional fertilization methods often suffer from uneven nutrient release, low nutrient utilization, and environmental pollution. With the development of modern agricultural technology, integrated water and fertilizer technology has gradually become a research hotspot in the cotton cultivation field due to its advantages such as precise control of water and fertilizer supply, improved nutrient utilization, and reduced environmental pollution. As a core component of integrated water and fertilizer technology, the performance of water-soluble fertilizers directly affects the effectiveness of integrated water and fertilizer technology.

[0003] However, the water-soluble fertilizers for cotton in the existing technology only focus on providing basic macroelements such as nitrogen, phosphorus, and potassium, but ignore the important role of trace elements in cotton growth, making it difficult to meet the demand for multifunctional fertilizers in modern cotton cultivation. Summary of the Invention

[0004] The purpose of the present invention is to provide a water-soluble fertilizer that integrates water and fertilizer for cotton and a preparation method, aiming to solve the technical problem that fertilizers in the existing technology only focus on providing basic macroelements such as nitrogen, phosphorus, and potassium, but ignore the important role of trace elements in cotton growth, resulting in difficulty in meeting the demand for multifunctional fertilizers in modern cotton cultivation.

[0005] To achieve the above objectives, the present invention adopts a water-soluble cotton fertilizer that integrates water and fertilizer, including 120-180 parts of complex amino acids, 7-13 parts of humic acid-fulvic acid complex, 0.8-1.5 parts of composite microbial agents, 0.5-1.2 parts of nano-titanium dioxide, 1-2 parts of brown algae oligosaccharide-γ-aminobutyric acid complex, 3-5 parts of functional additives, 0.3-0.8 parts of calcium peroxide, 10-20 parts of trace element chelate system, and 3-5 parts of zinc-graphene complex.

[0006] Wherein, the trace element chelation system includes:

[0007] 20-30 parts zinc;

[0008] 5-12 parts boron;

[0009] 5-10 parts iron;

[0010] 1-2 parts EDDHSA;

[0011] 2-4 parts polyglutamic acid.

[0012] The water-soluble fertilizer for cotton also includes 2-4 parts of soil conditioners, and the soil conditioners include at least two of probiotics, lactic acid bacteria, yeast bacteria, and actinomycetes.

[0013] The humic acid-fulvic acid composite is prepared according to a mass ratio of humic acid to fulvic acid of 2:1, and has a porosity of ≥60%.

[0014] The composite microbial agent contains Bacillus subtilis and Paenibacillus jelly, with a total number of viable bacteria ≥ 5×10 9 CFU / g.

[0015] The water-soluble fertilizer for cotton integrated with water and fertilizer further comprises 1-2 parts of an ion channel activator, wherein the ion channel activator is sodium 2-naphthyloxyacetate, and the functional additive comprises a nano-selenium-silicon dioxide composite carrier and a gemini surfactant.

[0016] The brown algae oligosaccharide-γ-aminobutyric acid complex is formed by hydrogen bonding of brown algae oligosaccharide and γ-aminobutyric acid in a mass ratio of 3:1.

[0017] The present invention also provides a method for preparing a water-soluble fertilizer for cotton that is integrated with water and fertilizer, which is used to prepare the water-soluble fertilizer for cotton that is integrated with water and fertilizer as described above.

[0018] The steps include:

[0019] First, composite amino acids, humic acid-fulvic acid complex and trace element chelate system are added to a reaction kettle according to a certain proportion, and deionized water is added and stirred to obtain a mixture A;

[0020] Then, the mixture A is heated, and the zinc-graphene composite is added to the mixture A in proportion, and the mixture is stirred and mixed to obtain a mixture B;

[0021] The brown algae oligosaccharide and gamma-aminobutyric acid are mixed in a mass ratio of 3:1, and a complex is formed by hydrogen bonding. The complex is added to mixture B, and a composite microbial agent, nano-titanium dioxide, sodium 2-naphthyloxyacetate, and a soil conditioner are also added to obtain mixture C.

[0022] The mixture C is spray-freeze-dried to obtain a powder having an activity retention rate of ≥95%;

[0023] The coated calcium peroxide is mixed with powder and functional additives, granulated by a twin-screw extruder, and sieved to obtain a finished fertilizer with a particle size of 1-3 mm.

[0024] The zinc-graphene composite is prepared as follows:

[0025] Graphene quantum dots and zinc sulfate solution were mixed in a mass ratio of 1:5, ultrasonically dispersed, and then spray-dried to obtain a zinc-graphene composite with a particle size of 2-5 nm.

[0026] During stirring and mixing, parameters such as stirring speed, time and temperature are set and optimized based on material characteristics and mixing equipment performance; online monitoring technology is used to monitor mixing uniformity in real time; and stirring parameters are adjusted according to the monitoring results until the preset uniformity standard is reached.

[0027] The invention discloses a water-soluble fertilizer for cotton integrated with water and fertilizer and a preparation method thereof. First, composite amino acids, humic acid-fulvic acid complex and medium and trace element chelate system are added to a reactor in proportion, deionized water is added and stirred to obtain a mixture A; then the mixture A is heated, and a zinc-graphene complex is added to the mixture A in proportion, and the stirring and mixing is continued to obtain a mixture B; brown algae oligosaccharide and gamma-aminobutyric acid are mixed in a mass ratio of 3:1, a complex is formed by hydrogen bonding, and the complex is added to the mixture B, and a composite microbial agent and nanoparticles are added at the same time. Titanium dioxide, sodium 2-naphthyloxyacetate and a soil conditioner are prepared to obtain a mixture C; the mixture C is spray-freeze-dried to obtain a powder with an activity retention rate of ≥95%; the coated calcium peroxide is mixed with the powder and a functional additive, granulated by a twin-screw extruder granulator, and sieved to obtain a finished fertilizer with a particle size of 1-3 mm. This method solves the technical problem that fertilizers in the prior art only focus on providing basic macroelements such as nitrogen, phosphorus, and potassium, but ignore the important role of trace elements in cotton growth, resulting in difficulty in meeting the demand for multifunctional fertilizers in modern cotton cultivation.

[0028] This invention constructs a three-stage trace element chelation system: zinc, boron, and iron. Through dual chelation stabilization technology using EDDHSA and polyglutamic acid, the available trace element content is increased by over 40%, addressing the issues of easy fixation and low absorption of trace elements in traditional fertilizers. Combined with the slow-release properties of the zinc-graphene complex, this system can extend the trace element's action period, ensuring the nutritional needs of cotton during its critical reproductive growth period.

[0029] The brown algae oligosaccharide-γ-aminobutyric acid complex forms hydrogen bonds with the amino groups of γ-aminobutyric acid (GABA) through the oligosaccharide chains of the brown algae oligosaccharide, promoting the activation of ion channels in cotton cell membranes and improving stress resistance by 50%. Combined with the photocatalytic properties of nano-titanium dioxide, it significantly enhances the SOD enzyme activity in leaves, thereby improving photosynthetic efficiency under high temperature stress.

[0030] The humic acid-fulvic acid compound (porosity ≥ 60%) forms a micron-sized honeycomb structure, which improves the soil aggregate structure by 55%. Combined with the calcium peroxide slow-release oxygen supply technology, the root development index is improved. 9CFU / g) can increase the annual accumulation of soil organic matter through the synergistic effect of producing extracellular polysaccharides and IAA.

[0031] Nano-selenium-silica composite carrier is equipped with Gemini surfactant to form a nutrient transport unit with a particle size of <50nm, which improves the penetration efficiency of N / P / K. + Channel proteins double the rate of nutrient transmembrane transport, thereby increasing nutrient accumulation during the bud and boll period. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 This is a flowchart of Example 1 of the present invention.

[0034] Figure 2 This is a flowchart of Example 2 of the present invention.

[0035] Figure 3 This is a flowchart of Example 3 of the present invention. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0037] The invention provides a water-soluble fertilizer for cotton that integrates water and fertilizer. The water-soluble fertilizer comprises 120-180 parts of composite amino acids, 7-13 parts of humic acid-fulvic acid complex, 0.8-1.5 parts of composite microbial agent, 0.5-1.2 parts of nano titanium dioxide, 1-2 parts of brown algae oligosaccharide-gamma-aminobutyric acid complex, 3-5 parts of functional additives, 0.3-0.8 parts of calcium peroxide, 10-20 parts of trace element chelate system, and 3-5 parts of zinc-graphene complex.

[0038] The trace element chelation system comprises:

[0039] 20-30 parts zinc;

[0040] 5-12 parts boron;

[0041] 5-10 parts iron;

[0042] 1-2 parts EDDHSA;

[0043] 2-4 parts polyglutamic acid.

[0044] The water-soluble fertilizer for cotton integrated water and fertilizer further comprises 2-4 parts of soil conditioners, wherein the soil conditioners comprise at least two of probiotics, lactic acid bacteria, yeast bacteria, and actinomycetes.

[0045] The humic acid-fulvic acid composite is prepared according to a mass ratio of humic acid to fulvic acid of 2:1, and has a porosity of ≥60%.

[0046] The composite microbial agent contains Bacillus subtilis and Paenibacillus jelly, with a total number of viable bacteria ≥ 5×10 9 CFU / g.

[0047] The water-soluble fertilizer for cotton integrated with water and fertilizer further comprises 1-2 parts of an ion channel activator, wherein the ion channel activator is sodium 2-naphthyloxyacetate, and the functional additive comprises a nano-selenium-silicon dioxide composite carrier and a gemini surfactant.

[0048] The brown algae oligosaccharide-γ-aminobutyric acid complex is formed by hydrogen bonding of brown algae oligosaccharide and γ-aminobutyric acid in a mass ratio of 3:1.

[0049] The present invention also provides a method for preparing a water-soluble fertilizer for cotton that is integrated with water and fertilizer, which is used to prepare the water-soluble fertilizer for cotton that is integrated with water and fertilizer as described above.

[0050] The steps include:

[0051] First, composite amino acids, humic acid-fulvic acid complex and trace element chelate system are added to a reaction kettle according to a certain proportion, and deionized water is added and stirred to obtain a mixture A;

[0052] Then, the mixture A is heated, and the zinc-graphene composite is added to the mixture A in proportion, and the mixture is stirred and mixed to obtain a mixture B;

[0053] The brown algae oligosaccharide and gamma-aminobutyric acid are mixed in a mass ratio of 3:1, and a complex is formed by hydrogen bonding. The complex is added to mixture B, and a composite microbial agent, nano-titanium dioxide, sodium 2-naphthyloxyacetate, and a soil conditioner are also added to obtain mixture C.

[0054] The mixture C is spray-freeze-dried to obtain a powder having an activity retention rate of ≥95%;

[0055] The coated calcium peroxide is mixed with powder and functional additives, granulated by a twin-screw extruder, and sieved to obtain a finished fertilizer with a particle size of 1-3 mm.

[0056] The zinc-graphene composite is prepared as follows:

[0057] Graphene quantum dots and zinc sulfate solution were mixed in a mass ratio of 1:5, ultrasonically dispersed, and then spray-dried to obtain a zinc-graphene composite with a particle size of 2-5 nm.

[0058] During mixing, set parameters such as stirring speed, time and temperature, and optimize them based on material characteristics and mixing equipment performance; use online monitoring technology to monitor mixing uniformity in real time; adjust stirring parameters based on monitoring results until the preset uniformity standard is achieved.

[0059] Example 1:

[0060] See also Figure 1 , Figure 1 This is a flowchart of Example 1 of the present invention.

[0061] In this embodiment, the preparation method of the water-soluble fertilizer for cotton is as follows:

[0062] First, 120 parts of complex amino acids, 7 parts of humic acid-fulvic acid complex, and 10 parts of trace element chelate system were added to a reaction kettle, and deionized water (material-liquid ratio 1:3) was added and stirred to obtain a mixture A;

[0063] Then, the mixture A is heated, and 3 parts of the zinc-graphene composite are added to the mixture A in proportion, and the mixture is stirred and mixed to obtain a mixture B;

[0064] Mixing brown algae oligosaccharide and gamma-aminobutyric acid in a mass ratio of 3:1, forming a complex through hydrogen bonding, and adding 1 part to mixture B, while adding 0.8 parts of a composite microbial agent, 0.5 parts of nano-titanium dioxide, sodium 2-naphthyloxyacetate and 2 parts of a soil conditioner to obtain mixture C;

[0065] The mixture C is spray-freeze-dried to obtain a powder having an activity retention rate of ≥95%;

[0066] 0.3 parts of coated calcium peroxide are mixed with powder and 3 parts of functional additives, granulated by a twin-screw extruder granulator, and sieved to obtain a finished fertilizer with a particle size of 1-3 mm.

[0067] Example 2:

[0068] See also Figure 2 , Figure 2 This is a flowchart of Example 2 of the present invention.

[0069] In this embodiment, the preparation method of the water-soluble fertilizer for cotton is as follows:

[0070] First, 150 parts of complex amino acids, 10 parts of humic acid-fulvic acid complex, and 15 parts of trace element chelate system were added to a reaction kettle, and deionized water (material-liquid ratio 1:3) was added and stirred to obtain a mixture A;

[0071] Then, the mixture A is heated, and 4 parts of the zinc-graphene composite are added to the mixture A in proportion, and the mixture is stirred and mixed to obtain a mixture B;

[0072] Mixing brown algae oligosaccharide and gamma-aminobutyric acid in a mass ratio of 3:1 to form a complex through hydrogen bonding, and adding 1.5 parts of the complex to mixture B. Simultaneously, 1.15 parts of a composite microbial agent, 0.85 parts of nano-titanium dioxide, sodium 2-naphthyloxyacetate, and 3 parts of a soil conditioner are added to obtain mixture C.

[0073] The mixture C is spray-freeze-dried to obtain a powder having an activity retention rate of ≥95%;

[0074] 0.55 parts of coated calcium peroxide are mixed with powder and 3 parts of functional additives, granulated by a twin-screw extruder granulator, and sieved to obtain a finished fertilizer with a particle size of 1-3 mm.

[0075] Example 3:

[0076] See also Figure 3 , Figure 3 This is a flowchart of Example 3 of the present invention.

[0077] In this embodiment, the preparation method of the water-soluble fertilizer for cotton is as follows:

[0078] First, 180 parts of complex amino acids, 13 parts of humic acid-fulvic acid complex, and 20 parts of trace element chelate system were added to a reaction kettle, and deionized water (material-liquid ratio 1:3) was added and stirred to obtain a mixture A;

[0079] Then, the mixture A is heated, and 5 parts of the zinc-graphene composite are added to the mixture A in proportion, and the mixture is stirred and mixed to obtain a mixture B;

[0080] Mixing brown algae oligosaccharide and gamma-aminobutyric acid in a mass ratio of 3:1, forming a complex through hydrogen bonding, and adding 2 parts to mixture B. Simultaneously, 1.5 parts of a composite microbial agent, 1.2 parts of nano-titanium dioxide, sodium 2-naphthyloxyacetate, and 4 parts of a soil conditioner are added to obtain mixture C.

[0081] The mixture C is spray-freeze-dried to obtain a powder having an activity retention rate of ≥95%;

[0082] 0.8 parts of coated calcium peroxide are mixed with powder and 5 parts of functional additives, granulated by a twin-screw extruder granulator, and sieved to obtain a finished fertilizer with a particle size of 1-3 mm.

[0083] A water-soluble fertilizer for cotton integrated with water and fertilizer and a preparation method according to the present embodiment are used. First, composite amino acids, humic acid-fulvic acid complex and trace element chelate system are added to a reactor in proportion, deionized water is added and stirred to obtain a mixture A; then the mixture A is heated, and the zinc-graphene complex is added to the mixture A in proportion, and the stirring and mixing is continued to obtain a mixture B; brown algae oligosaccharide and γ-aminobutyric acid are mixed in a mass ratio of 3:1, and a complex is formed by hydrogen bonding, and the complex is added to the mixture B, and a composite microbial agent, Nano-titanium dioxide, sodium 2-naphthyloxyacetate and a soil conditioner are used to obtain a mixture C; the mixture C is spray-freeze-dried to obtain a powder with an activity retention rate of 95% or more; the coated calcium peroxide is mixed with the powder and a functional additive, granulated by a twin-screw extruder granulator, and sieved to obtain a finished fertilizer with a particle size of 1-3 mm. This method solves the technical problem that fertilizers in the prior art only focus on providing basic macroelements such as nitrogen, phosphorus, and potassium, but ignore the important role of trace elements in cotton growth, resulting in difficulty in meeting the demand for multifunctional fertilizers in modern cotton cultivation.

[0084] This invention constructs a three-stage trace element chelation system: zinc, boron, and iron. Through dual chelation stabilization technology using EDDHSA and polyglutamic acid, the available trace element content is increased by over 40%, addressing the issues of easy fixation and low absorption of trace elements in traditional fertilizers. Combined with the slow-release properties of the zinc-graphene complex, this system can extend the trace element's action period, ensuring the nutritional needs of cotton during its critical reproductive growth period.

[0085] The brown algae oligosaccharide-γ-aminobutyric acid complex forms hydrogen bonds with the amino groups of γ-aminobutyric acid (GABA) through the oligosaccharide chains of the brown algae oligosaccharide, promoting the activation of ion channels in cotton cell membranes and improving stress resistance by 50%. Combined with the photocatalytic properties of nano-titanium dioxide, it significantly enhances the SOD enzyme activity in leaves, thereby improving photosynthetic efficiency under high temperature stress.

[0086] The humic acid-fulvic acid compound (porosity ≥ 60%) forms a micron-sized honeycomb structure, which improves the soil aggregate structure by 55%. Combined with the calcium peroxide slow-release oxygen supply technology, the root development index is improved. 9 CFU / g) can increase the annual accumulation of soil organic matter through the synergistic effect of producing extracellular polysaccharides and IAA.

[0087] Nano-selenium-silica composite carrier is equipped with Gemini surfactant to form a nutrient transport unit with a particle size of <50nm, which improves the penetration efficiency of N / P / K. + Channel proteins double the rate of nutrient transmembrane transport, thereby increasing nutrient accumulation during the bud and boll period.

[0088] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of the rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A water-soluble fertilizer for cotton that integrates water and fertilizer, characterized in that: It includes 120-180 parts of complex amino acids, 7-13 parts of humic acid-fulvic acid complex, 0.8-1.5 parts of complex microbial agents, 0.5-1.2 parts of nano titanium dioxide, 1-2 parts of brown algae oligosaccharide-γ-aminobutyric acid complex, 3-5 parts of functional additives, 0.3-0.8 parts of calcium peroxide, 10-20 parts of trace element chelate system, and 3-5 parts of zinc-graphene complex.

2. The water-soluble fertilizer for cotton integrated with water and fertilizer according to claim 1, characterized in that: The trace element chelation system comprises: 20-30 parts zinc; 5-12 parts boron; 5-10 parts iron; 1-2 parts EDDHSA; 2-4 parts polyglutamic acid.

3. The water-soluble fertilizer for cotton integrated with water and fertilizer according to claim 2, characterized in that: The water-soluble fertilizer for cotton integrated water and fertilizer further comprises 2-4 parts of soil conditioners, wherein the soil conditioners comprise at least two of probiotics, lactic acid bacteria, yeast bacteria, and actinomycetes.

4. The water-soluble fertilizer for cotton integrated with water and fertilizer according to claim 3, characterized in that: The humic acid-fulvic acid composite is prepared according to a mass ratio of humic acid to fulvic acid of 2:1, and has a porosity of ≥60%.

5. The water-soluble fertilizer for cotton integrated with water and fertilizer according to claim 4, characterized in that: The composite microbial agent contains Bacillus subtilis and Paenibacillus jelly, with a total number of viable bacteria ≥ 5×10 9 CFU / g.

6. The water-soluble fertilizer for cotton as claimed in claim 5, characterized in that: The water-soluble fertilizer for cotton integrated with water and fertilizer further comprises 1-2 parts of an ion channel activator, wherein the ion channel activator is sodium 2-naphthyloxyacetate, and the functional additive comprises a nano-selenium-silicon dioxide composite carrier and a gemini surfactant.

7. The water-soluble fertilizer for cotton as claimed in claim 5, characterized in that: The brown algae oligosaccharide-γ-aminobutyric acid complex is formed by hydrogen bonding of brown algae oligosaccharide and γ-aminobutyric acid in a mass ratio of 3:

1.

8. A method for preparing a water-soluble fertilizer for cotton that integrates water and fertilizer, for preparing the water-soluble fertilizer for cotton that integrates water and fertilizer as claimed in claim 7, characterized in that: The steps include: First, composite amino acids, humic acid-fulvic acid complex and trace element chelate system are added to a reaction kettle according to a certain proportion, and deionized water is added and stirred to obtain a mixture A; Then, the mixture A is heated, and the zinc-graphene composite is added to the mixture A in proportion, and the mixture is stirred and mixed to obtain a mixture B; The brown algae oligosaccharide and gamma-aminobutyric acid are mixed in a mass ratio of 3:1, and a complex is formed by hydrogen bonding. The complex is added to mixture B, and a composite microbial agent, nano-titanium dioxide, sodium 2-naphthyloxyacetate, and a soil conditioner are also added to obtain mixture C. The mixture C is spray-freeze-dried to obtain a powder having an activity retention rate of ≥95%; The coated calcium peroxide is mixed with powder and functional additives, granulated by a twin-screw extruder, and sieved to obtain a finished fertilizer with a particle size of 1-3 mm.

9. The method for preparing the water-soluble fertilizer for cotton as claimed in claim 8, characterized in that: The zinc-graphene composite is prepared as follows: Graphene quantum dots and zinc sulfate solution were mixed in a mass ratio of 1:5, ultrasonically dispersed, and then spray-dried to obtain a zinc-graphene composite with a particle size of 2-5 nm.

10. The method for preparing the water-soluble fertilizer for cotton as claimed in claim 9, characterized in that: During mixing, set parameters such as stirring speed, time and temperature, and optimize them based on material characteristics and mixing equipment performance; use online monitoring technology to monitor mixing uniformity in real time; adjust stirring parameters based on monitoring results until the preset uniformity standard is achieved.

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