CN-122010633-A - Instant full-nutrition water-soluble fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of fertilizers, in particular to an instant full-nutrition water-soluble fertilizer and a preparation method thereof. The fertilizer comprises a synergistic modified total nutrient water-soluble fertilizer matrix, organic micromolecular function regulator quercetin, polyaspartic acid, potassium fulvate, sodium lignin sulfonate, sodium alginate and disodium ethylenediamine tetraacetate. The synergistic modified total nutrient water-soluble fertilizer matrix takes a total nutrient water-soluble fertilizer matrix composed of potassium nitrate, potassium dihydrogen phosphate, urea and magnesium sulfate as a main material, and a polyphenol-metal coordination structure, a dynamic borate structure, a silicon-oxygen bridging structure and a host-guest inclusion structure are sequentially constructed on the particle surface of the total nutrient water-soluble fertilizer matrix, so that a multi-network synergistic modified interface layer is formed. Through the structural design, the fertilizer can improve the stability of a particle structure and regulate and control nutrient release behaviors while keeping good instant performance, so that the utilization efficiency of the fertilizer is improved and the growth of crops is promoted.

Inventors

• DAI LIJUAN
• LI SHUYAN
• LI WENZHENG

Assignees

• 青岛益佰农肥业有限公司

Dates

Publication Date

20260512

Application Date

20260311

Claims (10)

1. 1. The instant full-nutrition water-soluble fertilizer is characterized by comprising, by weight, 60-95 parts of a full-nutrition water-soluble fertilizer matrix subjected to synergistic modification, 0.2-4 parts of an organic micromolecule function regulator, 0.2-3 parts of polyaspartic acid, 0.5-4 parts of potassium fulvate, 0.5-4 parts of sodium lignin sulfonate, 0.2-3 parts of sodium alginate and 0.2-2 parts of disodium ethylenediamine tetraacetate, wherein the organic micromolecule function regulator is quercetin, the full-nutrition water-soluble fertilizer matrix subjected to synergistic modification is a full-nutrition water-soluble fertilizer matrix formed by potassium nitrate, potassium dihydrogen phosphate, urea and magnesium sulfate, a polyphenol-quinomine interface layer is sequentially formed on the particle surface of the full-nutrition water-soluble fertilizer matrix, metal-polyphenol coordination curing is performed by ferric trichloride, a dynamic boric acid ester bond is formed by catechol and 4-vinylphenylboronic acid in situ, a silicon-oxygen bridge network is formed by hydrolysis polycondensation of N- (2-aminoethyl) -3-aminopropyl triethoxysilane, and a beta-cyclodextrin and a main-cyclodextrin locking structure is simultaneously utilized to form a multi-guest network subjected to synergistic modification.
2. 2. The instant full-nutrition water-soluble fertilizer according to claim 1, wherein the synergistic modified full-nutrition water-soluble fertilizer matrix comprises, by weight, 25-45 parts of potassium nitrate, 15-30 parts of monopotassium phosphate, 10-25 parts of urea, 5-15 parts of magnesium sulfate, 0.5-5 parts of tannic acid, 0.2-3 parts of dopamine, 0.1-2 parts of ferric trichloride, 0.5-4 parts of catechol, 0.5-4 parts of 4-vinylphenylboronic acid, 0.5-5 parts of N- (2-aminoethyl) -3-aminopropyl triethoxysilane, 0.5-5 parts of beta-cyclodextrin and 0.2-3 parts of amantadine.
3. 3. An instant total nutrient water-soluble fertilizer according to claim 1 or 2, characterized in that the method for preparing the synergistically modified total nutrient water-soluble fertilizer matrix comprises the following steps: (1) Mixing potassium nitrate, monopotassium phosphate, urea and magnesium sulfate, and granulating to obtain full-nutrition water-soluble fertilizer matrix particles; (2) Mixing tannic acid, dopamine and ferric trichloride to form metal-polyphenol coordination interface modification liquid, and adding the total nutrient water-soluble fertilizer matrix particles into the metal-polyphenol coordination interface modification liquid to perform interface modification treatment to obtain modified matrix particles with metal-polyphenol coordination structures on the surfaces; (3) Catechol, 4-vinylphenylboronic acid, N- (2-aminoethyl) -3-aminopropyl triethoxysilane, beta-cyclodextrin and amantadine are mixed to form a composite modified liquid, and modified substrate particles are added into the composite modified liquid for treatment, so that the synergistic modified full-nutrition water-soluble fertilizer substrate is obtained.
4. 4. The instant total nutrient water-soluble fertilizer as claimed in claim 3, wherein the reaction condition of the step (1) is mixing at 40-70 ℃, and the total nutrient water-soluble fertilizer matrix particles are obtained by spray granulation.
5. 5. The instant total nutrient water-soluble fertilizer according to claim 3, wherein the reaction condition of the step (2) is stirring reaction for 10-60 min under the condition of pH 7.5-9.0, and the total nutrient water-soluble fertilizer matrix particles are immersed for 0.5-3 h.
6. 6. The instant total nutrient water-soluble fertilizer according to claim 3, wherein the reaction condition of the step (3) is stirring reaction for 0.5-4 hours at 30-80 ℃, and the modified particles are treated for 0.5-3 hours and then subjected to solid-liquid separation and drying treatment.
7. 7. The preparation method of the instant total nutrient water-soluble fertilizer is characterized by comprising the following steps of: s1, crushing or granulating the synergetic modified total nutrient water-soluble fertilizer matrix to ensure that the particle size is uniform; S2, adding quercetin, polyaspartic acid, potassium fulvate, sodium lignin sulfonate, sodium alginate and disodium ethylenediamine tetraacetate into the synergistic modified total nutrient water-soluble fertilizer matrix, and carrying out mixing treatment to obtain a uniform fertilizer mixture; s3, granulating or spray-drying the fertilizer mixture to obtain the instant full-nutrition water-soluble fertilizer.
8. 8. The method for preparing the instant total nutrient water-soluble fertilizer according to claim 7, wherein the reaction condition of the step S1 is that the crushing treatment is carried out at 20-40 ℃ and the particle size is controlled to be 0.2-1.5 mm.
9. 9. The method for preparing the instant total nutrient water-soluble fertilizer according to claim 7, wherein the reaction condition of the step S2 is that the mixture is stirred and mixed for 20-60 min at 200-600 r/min under the condition of 20-50 ℃.
10. 10. The method for preparing the instant total nutrient water-soluble fertilizer according to claim 7, wherein the reaction condition of the step S3 is spray granulation or fluidized bed granulation, and drying is performed for 10-60 min at 50-90 ℃.

Description

Instant full-nutrition water-soluble fertilizer and preparation method thereof Technical Field The invention belongs to the technical field of fertilizers, and particularly relates to an instant full-nutrition water-soluble fertilizer and a preparation method thereof. Background The water-soluble fertilizer is a type of fertilizer which can be completely or basically dissolved in water and can be applied by means of spray irrigation, drip irrigation and the like, has the advantages of high nutrient utilization rate, convenient application, quick response and the like, and is widely applied to the fields of facility agriculture, economic crop planting and modern precise agriculture. The total nutrient water-soluble fertilizer is prepared from nitrogen, phosphorus, potassium and medium trace elements according to a certain proportion, and can provide comprehensive nutrients for crops in a short time, so that the total nutrient water-soluble fertilizer is widely applied to fruit and vegetable planting, flower cultivation and economic crop production. However, most of the existing instant total nutrient water-soluble fertilizers are simple physical mixed systems of various inorganic nutrient salts, and after the instant total nutrient water-soluble fertilizers are applied to soil, nutrients are easy to dissolve out and migrate, so that the utilization rate of the nutrients is reduced, and meanwhile, the problems of soil salt accumulation, nutrient leaching and the like are possibly caused. The traditional water-soluble fertilizer system generally lacks of structural regulation and control on the surface of fertilizer particles, so that the fertilizer is difficult to form a stable microstructure in a water-soluble environment, and effective regulation and control on nutrient release behaviors are difficult to realize. In order to solve the problems, the prior art generally carries out modification treatment on the fertilizer through a coating, a slow-release material or an inorganic carrier, but the method often reduces the dissolution rate of the fertilizer, and is difficult to combine the quick-solubility and the stable release performance of the nutrient. Meanwhile, the partial modification mode has a single structure, the interface regulation and control capability on the fertilizer matrix is limited, and the comprehensive performance of the fertilizer is difficult to be obviously improved. Therefore, the instant full-nutrition water-soluble fertilizer which can improve the nutrient utilization rate and the fertilizer stability by constructing a stable interface structure to carry out synergistic modification on the full-nutrition water-soluble fertilizer matrix while maintaining the instant characteristic is developed, and has important research significance and application value. Disclosure of Invention The invention aims to solve the technical problems that in the prior art, the instant full-nutrition water-soluble fertilizer is too fast in nutrient release, low in utilization rate and single in fertilizer particle interface structure, and stable regulation and control of nutrients are difficult to realize. The invention builds a polyphenol-quinolamine interface layer on the surface of the all-nutrition water-soluble fertilizer matrix particles and cures the all-nutrition water-soluble fertilizer by a metal-polyphenol coordination structure, simultaneously further introduces a dynamic boric acid ester bond structure, a silica bridge network structure and a host-guest inclusion structure to carry out multi-network collaborative modification, and combines quercetin as an organic micromolecule function regulator to enable the all-nutrition water-soluble fertilizer matrix to form a stable interface collaborative modification structure system, thereby obtaining the water-soluble fertilizer with good instant property and stable nutrient release characteristic. According to the invention, a multi-network synergistic interface modification structure is constructed, so that the stable regulation and control of nutrient release behavior are realized while the quick dissolution characteristic of the fertilizer is maintained, and the fertilizer utilization efficiency is improved. The aim of the invention can be achieved by the following technical scheme: The instant full-nutrition water-soluble fertilizer comprises, by weight, 60-95 parts of a full-nutrition water-soluble fertilizer matrix subjected to synergistic modification, 0.2-4 parts of an organic small molecule function regulator, 0.2-3 parts of polyaspartic acid, 0.5-4 parts of potassium fulvate, 0.5-4 parts of sodium lignin sulfonate, 0.2-3 parts of sodium alginate and 0.2-2 parts of disodium ethylenediamine tetraacetate, wherein the organic small molecule function regulator is quercetin, the full-nutrition water-soluble fertilizer matrix subjected to synergistic modification is prepared from a full-nutrition water-soluble fertilizer matrix consisting of pot