CN-121974745-A - Double-source fulvic acid organic fertilizer and preparation method thereof

Abstract

The invention belongs to the technical field of organic fertilizers, and in particular relates to a double-source fulvic acid organic fertilizer and a preparation method thereof, wherein the organic fertilizer comprises, by weight, 1-3 parts of mineral source fulvic acid, 3-20 parts of biological source fulvic acid, 1-8 parts of functional auxiliary agents, 0.5 part of dispersing agents and 0.3 part of stabilizers, and the functional auxiliary agents comprise diatomite, biochar, dopamine, beta-cyclodextrin and the like, have porous slow release channels, promote the effective retention and nutrient utilization of the double-source fulvic acid in rhizosphere or leaf surfaces, realize the synergistic complementation of the high efficiency of the mineral source fulvic acid and the high water solubility and stability of the biological source fulvic acid, and have good application prospects.

Inventors

• ZHOU BAODONG
• Zhou Chuanchao
• WANG ZHEN
• Wei Shengya

Assignees

• 山东东泰农化有限公司

Dates

Publication Date

20260505

Application Date

20260127

Claims (6)

1. 1. The double-source fulvic acid organic fertilizer is characterized by comprising, by weight, 1-3 parts of mineral source fulvic acid, 3-20 parts of biological source fulvic acid, 1-8 parts of functional auxiliary agents, 0.5 part of dispersing agents and 0.3 part of stabilizers; the functional auxiliary agent comprises the following raw materials of diatomite, biochar, dopamine, PDMAPS, beta-cyclodextrin and gluconate, and the preparation method of the functional auxiliary agent comprises the following steps: S1, mixing diatomite and biochar, crushing, sieving to obtain mixed powder, and adding PDMAPS, beta-cyclodextrin and gluconate into deionized water together to uniformly mix to obtain a functional solution; S2, mixing and dispersing the mixed powder and the functional solution to obtain mixed slurry, adjusting the pH of the mixed slurry, and adding dopamine into the mixed slurry to obtain slurry; and S3, drying, crushing and sieving the slurry to obtain the functional auxiliary agent.
2. 2. The dual-source fulvic acid organic fertilizer according to claim 1, wherein the mass ratio of diatomite, biochar, dopamine, PDMAPS, beta-cyclodextrin and gluconate is 60:22:0.5:4:11:3.
3. 3. The dual source organic fulvic acid fertilizer according to claim 1, wherein the mineral source fulvic acid is in powder form and is prepared from weathered coal, lignite, peat and oil shale; The biological source fulvic acid is in a powder or liquid form and is prepared from grain-based residues, plant straws, bagasse, wood dust and kitchen waste through microbial fermentation.
4. 4. A dual source fulvic acid organic fertilizer according to claim 3 wherein the dispersant is selected from one or more of silica, starch, EO-PO block copolymer and xanthan gum.
5. 5. A dual source fulvic acid organic fertilizer according to claim 3 wherein said stabilizer is selected from sodium lignosulfonate or potassium sorbate.
6. 6. A process for the preparation of a double source fulvic acid organic fertiliser according to any one of claims 1 to 5, characterised by the specific steps of: step 1, uniformly mixing mineral source fulvic acid, biological source fulvic acid and functional auxiliary agent, and stirring at a controlled temperature to obtain a primary mixture; step 2, adding a dispersing agent and a stabilizing agent into the initial mixture for mixing to obtain a mixture; And 3, sieving or defoaming the mixture, and sub-packaging to obtain the double-source fulvic acid organic fertilizer.

Description

Double-source fulvic acid organic fertilizer and preparation method thereof Technical Field The invention belongs to the technical field of organic fertilizers, and particularly relates to a double-source fulvic acid organic fertilizer and a preparation method thereof. Background Fulvic acid is an active component with smaller molecular weight and better water solubility in humic acid, and has the comprehensive effects of promoting the growth and development of crops and improving the utilization efficiency of fertilizers. In agricultural production, the fulvic acid can stimulate root system growth and flower bud differentiation, enhance the stress resistance and disease resistance of crops, improve the quality and commodity of crops, promote the absorption and utilization of nitrogen, phosphorus, potassium and medium trace elements, and simultaneously promote the formation of soil aggregate structure, buffer soil pH and improve the soil microbial environment, thereby improving the comprehensive fertility of soil. In recent years, the fulvic acid products are increasingly widely applied in the agricultural field, and have good popularization value and application prospect. Fulvic acid is generally classified into mineral-derived fulvic acid and biological-derived fulvic acid according to the source. The mineral source fulvic acid is mainly extracted from weathered coal, lignite, peat or oil shale and the like, has higher aromaticity degree, more functional groups and stronger field efficacy, belongs to non-renewable resources and is easy to flocculate and settle in hard water or a high-ionic strength system to influence the compounding and popularization, and the biological source fulvic acid is mainly prepared from straws, saw dust and the like through microbial fermentation or high-temperature and high-pressure reaction, has smaller molecular weight, stronger hydrophilicity and better water solubility and compatibility stability, and can expand the functional range by introducing sulfo groups, sulfomethyl groups and the like. In order to take account of the high efficiency of the mineral source fulvic acid and the high water solubility and stability of the biological source fulvic acid, the double source fulvic acid is developed and used as a fertilizer synergist to be applied to organic fertilizers and various water-soluble fertilizer systems. Disclosure of Invention Aiming at the situation, the invention provides the double-source fulvic acid organic fertilizer and the preparation method thereof, which take mineral source fulvic acid and biological source fulvic acid as core active components, and through introducing functional auxiliary agents consisting of diatomite, biochar, dopamine, beta-cyclodextrin and the like, the synergistic complementation of the high efficiency of the mineral source fulvic acid and the high water solubility and stability of the biological source fulvic acid is realized, so that the effective utilization rate of the fulvic acid and nutrients is improved, and the growth promotion and stress resistance synergistic effect and application suitability of crops are enhanced. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The invention provides a double-source fulvic acid organic fertilizer which comprises, by weight, 1-3 parts of mineral source fulvic acid, 3-20 parts of biological source fulvic acid, 1-8 parts of a functional auxiliary agent, 0.5 part of a dispersing agent and 0.3 part of a stabilizing agent. Further, the mineral source fulvic acid is in a powder form and is prepared from weathered coal, lignite, peat and oil shale. Further, the biogenic fulvic acid is in a powder or liquid form and is prepared from grain-based residues, plant straws, bagasse, wood chips and kitchen wastes through microbial fermentation. Further, the dispersant is selected from one or more of silica, starch, EO (ethylene oxide) -PO (propylene oxide) block copolymer, and xanthan gum. Further, the stabilizer is sodium lignin sulfonate or potassium sorbate. Further, the functional auxiliary agent comprises the following raw materials of diatomite, biochar, dopamine, PDMAPS (sulfo betaine modified starch), beta-cyclodextrin and gluconate, wherein the mass ratio of the diatomite to the biochar to the dopamine to the PDMAPS to the beta-cyclodextrin to the gluconate is 60:22:0.5:4:11:3. Further, the preparation method of the functional auxiliary agent comprises the following steps: S1, mixing diatomite and biochar, drying, crushing, sieving with a 200-mesh sieve to obtain mixed powder, adding PDMAPS, beta-cyclodextrin and gluconate together into deionized water, stirring and mixing uniformly, wherein PDMAPS provides a strong hydration group which can inhibit flocculation caused by Ca 2+/Mg2+ in a subsequent liquid system, beta-cyclodextrin realizes inclusion of fulvic acid active small molecule fragments, and gluconate improves stable dispersion of the