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CN-121974754-A - High-absorptivity glycoside compound synergistic water-soluble fertilizer and preparation method thereof

CN121974754ACN 121974754 ACN121974754 ACN 121974754ACN-121974754-A

Abstract

The application relates to a high-absorptivity glycoside compound synergistic water-soluble fertilizer and a preparation method thereof. The water-soluble fertilizer comprises a nitrogen source, a phosphorus source, a potassium source, a chelated trace element, a water-soluble organic matter, an auxiliary agent, a structure stabilizer and an absorption promoting component in parts by weight, wherein the absorption promoting component consists of cyclodextrin inclusion glycoside compounds, sodium alginate oligosaccharides and sodium polyaspartate, and the structure stabilizer is chitosan quaternary ammonium salt. The cyclodextrin is used for clathrating the glycoside compounds, so that the stability and the availability of the glycoside compounds in a water-soluble system are improved, and the polysaccharide oligomer and the polyamino acid are combined to synergistically promote root absorption and in-vivo transportation. The absorption promoting mother solution, the nutrient salt mother solution and the compound preparation are prepared step by step, so that the components are uniformly dispersed and the system is stable. Test results show that the water-soluble fertilizer can improve the accumulation level of the glycoside target object in plants, synchronously promote mineral nutrition absorption and yield and quality improvement, and is suitable for water-fertilizer integrated application of various crops.

Inventors

  • SONG XINXIN
  • DONG TINGTING
  • ZHU YAHUI

Assignees

  • 湖北渤海化肥集团有限公司

Dates

Publication Date
20260505
Application Date
20260407

Claims (10)

  1. 1. The high-absorptivity glycoside compound synergistic water-soluble fertilizer is characterized by comprising the following components in parts by weight: 80-220 parts of nitrogen source, 20-120 parts of phosphorus source calculated by P 2 O 5 , 60-260 parts of potassium source calculated by K 2 O, 2-30 parts of chelated trace elements, 10-120 parts of water-soluble organic matters, 1-15 parts of auxiliary agents, 0.5-10 parts of structure stabilizers, 200-800 parts of deionized water and 50-85 parts of absorption promoting components; The absorption promoting component comprises, by weight, 30-50 parts of cyclodextrin inclusion glycoside compounds, 15-25 parts of sodium alginate oligosaccharides and 5-10 parts of sodium polyaspartate; The structure stabilizer is chitosan quaternary ammonium salt.
  2. 2. The high-absorptivity glycoside compound synergistic water-soluble fertilizer according to claim 1, wherein the nitrogen source is one or more of urea, ammonium nitrate, calcium nitrate, ammonium sulfate and monoammonium phosphate, the phosphorus source is one or more of monoammonium phosphate, diammonium phosphate, monopotassium phosphate and polyphosphate, the potassium source is one or more of potassium nitrate, potassium sulfate, potassium chloride and monopotassium phosphate, and the polyphosphate is sodium hexametaphosphate and/or sodium tripolyphosphate.
  3. 3. The high absorptivity glycoside compound synergistic water soluble fertilizer of claim 1, wherein the chelating trace elements include one or more of Fe, zn, mn, cu, B, mo and are present in the form of EDTA chelate, DTPA chelate, gluconate or citrate.
  4. 4. The high-absorptivity glycoside compound synergistic water-soluble fertilizer according to claim 1, wherein the cyclodextrin inclusion glycoside compound is prepared from cyclodextrin and glycoside compounds, the cyclodextrin is beta-cyclodextrin or hydroxypropyl-beta-cyclodextrin, and the glycoside compound is one or a combination of more of daidzin, hesperidin or rutin.
  5. 5. The high-absorptivity glycoside compound synergistic water-soluble fertilizer according to claim 4, wherein the preparation method of the cyclodextrin inclusion glycoside compound comprises the following steps: (1) Dissolving the glycoside compound in an ethanol water solution with the mass fraction of 60% -70% to prepare a glycoside compound solution with the concentration of 50 mg/mL-80 mg/mL, and stirring for 10 min-30 min until the glycoside compound is clarified or uniformly dispersed; (2) Adding the cyclodextrin into hot water at 60-70 ℃ to prepare saturated or nearly saturated beta-cyclodextrin aqueous solution, and stirring for 10-40 min; (3) Slowly dropwise adding the glycoside compound solution obtained in the step (1) into the cyclodextrin aqueous solution obtained in the step (2) at the dropwise adding rate of 0.5 mL/min-3 mL/min under the condition of 50-60 ℃ and continuous stirring, continuously preserving heat and stirring for 2-3 h after the dropwise adding is finished, and controlling the molar ratio of the glycoside compound to the beta-cyclodextrin to be 1 (1-1.2); (4) And (3) cooling the mixed system obtained in the step (3) to room temperature at a rate of 0.5-2 ℃ per minute, standing and crystallizing at4 ℃ for 12-24 hours, filtering, washing the precipitate with deionized water for 1-3 times, and vacuum drying at 40-50 ℃ to constant weight to obtain the cyclodextrin inclusion glycoside compound.
  6. 6. The high-absorptivity glycoside compound synergistic water-soluble fertilizer according to claim 1, wherein the number average molecular weight of the sodium alginate oligosaccharide is 0.5 kDa-5 kDa.
  7. 7. The high-absorptivity glycoside compound synergistic water-soluble fertilizer according to claim 1, wherein the weight average molecular weight of the sodium polyaspartate is 1 kDa-20 kDa.
  8. 8. The high-absorptivity glycoside compound synergistic water-soluble fertilizer according to claim 1, wherein the water-soluble organic matter is one or more of polyglutamic acid, betaine, glycine, proline or seaweed extract, and the seaweed extract is powder or liquid, and the alginic acid content of the seaweed extract is 1% -20% on a dry basis.
  9. 9. The high-absorptivity glycoside compound synergistic water-soluble fertilizer according to claim 1, wherein the auxiliary agent comprises a composition of a dispersing agent, a defoaming agent and a leveling agent, wherein the mass ratio of the dispersing agent to the defoaming agent to the leveling agent is A, B is C, A=1, B=0.05-0.2 and C=0.1-0.6.
  10. 10. A method for preparing the high absorptivity glycoside compound synergistic water-soluble fertilizer according to any one of claims 1 to 9, which is characterized by comprising the following steps: S1, adding the weight parts of sodium alginate oligosaccharides and sodium polyaspartate into deionized water, stirring at 200-800 rpm at 25-45 ℃ for 20-60 min to fully dissolve, then adding the weight parts of cyclodextrin inclusion glycoside compounds, and continuously stirring at 300-1000 rpm for 30-90 min to form uniform absorption promotion mother liquor; S2, weighing the nitrogen source, the phosphorus source and the potassium source in parts by weight, adding the nitrogen source, the phosphorus source and the potassium source into the rest parts of deionized water, and stirring at 100 rpm-500 rpm for 20 min-80 min at the temperature of 20-50 ℃ to obtain nutrient salt mother liquor; S3, adding the chelated trace elements and the water-soluble organic matters into the nutrient salt mother solution obtained in the step S2, and stirring for 10 min-40 min at a rotating speed of 200 rpm-600 rpm, and then adding the chitosan quaternary ammonium salt in parts by weight and stirring for 10 min-30 min at a rotating speed of 150 rpm-500 rpm to obtain a trace and organic matter compound solution; S4, slowly adding the uniform absorption promoting mother solution obtained in the step S1 into the micro-amount and organic matter compound solution obtained in the step S3, stirring at a speed of 180-400 rpm for 20-60 min at a temperature of 20-40 ℃, adding the auxiliary agent in parts by weight, stirring for 5-20 min, and adjusting the pH to 4.5-7.5; And S5, filtering the mixture obtained in the step S4 through a filter screen with 80-200 meshes to remove coarse particles and gel aggregates, and obtaining the high-absorptivity glycoside compound synergistic water-soluble fertilizer.

Description

High-absorptivity glycoside compound synergistic water-soluble fertilizer and preparation method thereof Technical Field The invention belongs to the technical field of water-soluble fertilizers, and particularly relates to a high-absorptivity glycoside compound synergistic water-soluble fertilizer and a preparation method thereof. Background With the development of modern agriculture to high efficiency, green and functionalization, functional fertilizers containing bioactive components are receiving attention. Among them, glycoside compounds have been tried to be introduced into fertilizer systems to achieve crop yield and synergy due to their effects of regulating plant metabolism, enhancing stress resistance, improving quality, etc. However, many glycoside compounds have the characteristics of limited water solubility, easy degradation or easy aggregation and inactivation, and the like, and have insufficient stability and lower actual absorption and utilization rate in the traditional water-soluble fertilizer system. In the prior art, chinese patent application document with publication number of CN114149286A discloses a medium element water-soluble fertilizer, which is prepared by heating and foaming phosphoric acid and urea to prepare ammonium polyphosphate as a high-phosphorus basic raw material, and chelating systems such as EDTA and the like, a stabilizer and a surfactant are matched to realize that metal ions are chelated under the high-phosphorus condition so as to reduce sediment generation and improve the solubility and application stability of the fertilizer. The Chinese patent application document with publication number of CN113214012A discloses a novel water-soluble fertilizer and a preparation method thereof, wherein in the intermediate element water-soluble fertilizer, ammonium polyphosphate is firstly prepared by heating and foaming phosphoric acid and urea to serve as a high-phosphorus basic component, and then a chelating system such as EDTA and the like, a sugar alcohol stabilizer and a surfactant are matched, so that metal ions are not easy to precipitate under the high-phosphorus condition, and the water solubility and the use stability of the fertilizer are improved. Therefore, in the prior art, the problems of metal ion precipitation and formula stability in the high-phosphorus or medium-element water-soluble fertilizer system are mainly solved by the part of the water-soluble fertilizer, the solubility is improved and the agglomeration or precipitation risk is reduced by introducing EDTA chelating system, stabilizer, surfactant and other means, but the technical scheme is mainly characterized by nutrient dissolution, and the design of inclusion protection and absorption delivery of functional micromolecules such as glycosides is lacked, so that the stable loading of glycoside components, effective delivery and compatibility of the system are difficult to realize at the same time. In addition, the conventional water-soluble fertilizer is easy to precipitate, agglomerate or delaminate in the process of high-concentration use or long-term storage, and the application uniformity and the effect stability are affected. Therefore, it is needed to provide a synergistic water-soluble fertilizer which can stably load glycoside compounds in a water-soluble system, synergistically improve the root absorption and in-vivo transportation efficiency, and simultaneously combine the formula stability and the preparation feasibility, so as to meet the actual requirements of efficient fertilization and function regulation of crops. Disclosure of Invention Aiming at the defects, the application provides a high-absorptivity glycoside compound synergistic water-soluble fertilizer and a preparation method thereof. Aiming at the problems that the existing water-soluble fertilizer technology is mainly used for improving the dissolution stability and inhibiting the precipitation of a high-phosphorus or medium-element system, but the stable loading and absorption delivery of functional micromolecules such as glycosides are lack of special design, the application provides the high-absorptivity glycoside compound synergistic water-soluble fertilizer and the preparation method thereof, and the cyclodextrin inclusion and absorption promoting component is matched with the structure stabilizer, so that the stability of the fertilizer formula is ensured, and the stable loading and absorption utilization efficiency of glycoside active ingredients are improved. The invention provides a high-absorptivity glycoside compound synergistic water-soluble fertilizer which comprises the following components in parts by weight: 80-220 parts of nitrogen source, 20-120 parts of phosphorus source calculated by P 2O5, 60-260 parts of potassium source calculated by K 2 O, 2-30 parts of chelated trace elements, 10-120 parts of water-soluble organic matters, 1-15 parts of auxiliary agents, 0.5-10 parts of structure stabilizers, 200-8