CN111285731A - Synergistic seaweed fertilizer with effervescence effect and preparation method thereof - Google Patents
Synergistic seaweed fertilizer with effervescence effect and preparation method thereof Download PDFInfo
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- CN111285731A CN111285731A CN202010273529.6A CN202010273529A CN111285731A CN 111285731 A CN111285731 A CN 111285731A CN 202010273529 A CN202010273529 A CN 202010273529A CN 111285731 A CN111285731 A CN 111285731A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention belongs to the technical field of urea fertilizers, and particularly relates to a synergistic seaweed fertilizer with an effervescent effect, which is prepared by adopting 780 parts of nitrogen fertilizer 600-containing materials, 4-8 parts of fermented alginic acid synergistic liquid, 1-2 parts of potassium carbonate, 1-2 parts of an isolating agent, 200 parts of phosphate fertilizer 100-containing materials, 80-120 parts of potassium fertilizer, 30-60 parts of secondary element compounds and 2-10 parts of trace element compounds. The invention also relates to a preparation method of the synergistic seaweed fertilizer with an effervescent function, which comprises the steps of grinding the raw materials into powder and compressing into tablets. The potassium carbonate is added, so that the effervescent fertilizer has an effervescent effect after meeting water, can accelerate the dissolution of the fertilizer, increases the nutrient absorption rate of crops, and has a wider application prospect.
Description
Technical Field
The invention belongs to the technical field of urea fertilizers, and particularly relates to a synergistic seaweed fertilizer with an effervescent function and a preparation method thereof.
Background
In the middle of present crops are planted, nutrition and growth requirements of crops can be guaranteed by fertilizing the crops, after fertilizer is generally fertilized and watered, the fertilizer is naturally and slowly dissolved in water, but the process can be slow, the requirements of the crops on nutrition can not be met when the crops urgently need nutrition, and particularly when the outdoor temperature in the north is low, the normal dissolving speed of the fertilizer can be slower, and the growth of the crops is not facilitated.
Disclosure of Invention
Aiming at various defects in the prior art, the inventor researches and designs a synergistic seaweed fertilizer with an effervescence effect and a preparation method thereof in long-term practice.
In order to achieve the purpose, the invention provides the following technical scheme:
a synergistic seaweed fertilizer with an effervescent effect is prepared from the following raw materials in parts by weight:
780 parts of nitrogen fertilizer 600-containing organic fertilizer, 4-8 parts of fermented alginic acid synergistic liquid, 1-2 parts of potassium carbonate, 1-2 parts of separant, 200 parts of phosphate fertilizer 100-containing organic fertilizer, 80-120 parts of potassium fertilizer, 30-60 parts of medium element compound and 2-10 parts of trace element compound.
Further, the preparation process of the fermented alginic acid synergistic liquid comprises the steps of firstly, selecting wild seaweed, airing until the water content is 35% -45%, crushing to 30-50 meshes by a crusher, and adding 0.8-0.9% of mixed strains; then, mixing the seaweed meal and water according to a weight ratio of 1.5: 1, mixing, uniformly stirring, controlling the temperature to be 70-75 ℃, and fermenting for 8-10 days; after fermentation, adding 3.5-4 times of water into the fermented material, stirring uniformly, and adjusting the pH to 7.5-8.5 by using 35% sodium hydroxide solution; then, the solution is stirred and extracted for 10 to 12 hours at the steam controlled temperature of 60 to 65 ℃, finally, the solution is pressed and filtered by a filter press, the pH of the obtained filtrate is adjusted to 7 by citric acid, and the filtrate is evaporated and concentrated to 10 percent of the volume of the solution, so that fermented alginic acid extracting solution with the solid content of 5 to 10 percent by weight is obtained, and the fermented alginic acid extracting solution is fermented alginic acid synergistic solution with the alginic acid content of 1.3 to 5 percent by weight.
Further, the seaweed fermentation residues are residues obtained by pressure filtration through a pressure filter after the fermented alginic acid synergistic liquid is extracted, the organic matter content of the residues is 75-85%, the water content of the residues is 5-15%, and the residues are crushed to the fineness of 45 meshes.
Further, 3 weight percent of iron-zinc preparation is added into the seaweed fermentation residues, and the iron-zinc preparation consists of 65 weight percent of ferrous sulfate and 35 weight percent of zinc oxide with the purity of 90 percent; the preparation process of the iron-zinc preparation comprises the steps of mixing ferrous sulfate and zinc oxide according to a proportion, adding 50 times of a water solution containing 5% of amino acid by volume, adding phosphoric acid with the volume ratio of 0.9% and the molar concentration of 50%, heating to 150 ℃ under 1.7 atmospheric pressure, and preserving heat for 6 hours.
Further, the mixed strain is a mixture of 55% of bacillus subtilis powder, 27% of saccharomycete powder and 18% of aspergillus niger powder, and the effective spore number of the mixed strain is not less than 2.5 multiplied by 1011cfu。
Further, the algae are natural algae growing in the sea, cryptogam plants of the plant kingdom. They are generally regarded as simple plants, and are mainly characterized by no vascular bundle tissues and no differentiation phenomena of true roots, stems and leaves; no flowering, no fruit and no seeds; the protection tissue without specialization of the reproductive organ usually produces spores or gametes directly from a single cell without the formation of embryos. The seaweed contains lipid 0.1-0.8%, saccharide 40-60% (such as seaweed biological polysaccharide), protein below 20%, and ash 20-40% by weight of seaweed.
Furthermore, the plant source natural regulation synergistic component in the fermented alginic acid synergistic solution comprises 0.002% -0.004% of cytokinin, 0.003% -0.005% of auxin, 0.001% -0.003% of cytokinin, 0.005% -0.007% of mannitol, 0.02% -0.05% of algal polysaccharide, 0.004% -0.006% of amino acid and 0.003% -0.005% of natural urease inhibitor.
The fermented alginic acid synergistic solution contains organic substances such as indoleacetic acid, plant growth hormone, alginic acid and the like, can promote the growth of crop roots, improve the activity of the roots and promote the absorption of the crop roots to nutrients; enhancing photosynthesis; organic substances in the fermented alginic acid synergistic liquid can adsorb and fix ammonium ions to a certain extent, reduce ammonia volatilization loss and have a certain inhibiting effect on soil urease activity.
In addition, the fermented alginic acid synergistic solution can also provide nutrient substances, improve the soil, fertility and improve the product quality, and active substances in the fermented alginic acid synergistic solution can also play roles in resisting drought, salt and alkali permeation, resisting cold, sterilizing and promoting the growth of crops.
Further, the nitrogen fertilizer comprises, by weight, 10-96 parts of ammonium chloride, 0.1-78.8 parts of ammonium sulfate, 0-8 parts of attapulgite powder, 0.01-0.02 part of acetohydroxamic acid, 0.01-1 part of compound amino acid and 0.01-0.2 part of dicyandiamide.
Further, the preparation method of the nitrogen fertilizer comprises the steps of fully mixing ammonium chloride, ammonium sulfate, attapulgite powder (containing water magnesium aluminum silicate), acetohydroxamic acid, compound amino acid and dicyandiamide, spraying a proper amount of water in a disc granulator for granulation, and drying to obtain the nitrogen fertilizer.
Further, the preparation method of the phosphate fertilizer is that firstly, the ingredients with the weight percentage of 13 percent of bacillus subtilis, 10 percent of bacillus licheniformis, 40 percent of cellulose streptomyces and 37 percent of aspergillus versicolor are mixed evenly to form flora; then mixing and stirring uniformly according to the formula of 40% of active organic material, 40% of rice bran, 16% of soybean meal, 2% of milk powder, 1% of sugar and the balance of water by weight percent to obtain a flora secondary culture medium; inoculating flora in a secondary flora culture medium at normal temperature, wherein the temperature of the culture medium is 60 ℃, the pH value is 7.0, the culture time is 5 days, and active bran bacteria of the flora are obtained after the culture is mature, and the viable bacteria content can reach 30 hundred million/g; and finally, uniformly mixing the phosphate rock powder 20 wt%, the active organic material 40 wt% and the active bran bacteria 40 wt%, fermenting at normal temperature for more than 12 days, crushing, and packaging to obtain the phosphate fertilizer.
Further, the preparation method of the potash fertilizer specifically comprises the steps of taking 80 parts by mass of potassium sulfate, 25 parts by mass of treated oyster shell powder and 1 part by mass of plant nutrient conditioner, uniformly mixing the raw materials, and extruding and granulating the mixture by a drum rolling device to obtain the potash fertilizer.
Further, the plant nutrition conditioner comprises 2 parts by weight of gamma-polyglutamic acid, 5 parts by weight of potassium humate, 10 parts by weight of urea, 1 part by weight of zinc sulfate, 0.2 part by weight of manganese sulfate, 3 parts by weight of ferrous sulfate, 0.5 part by weight of boric acid, 0.1 part by weight of sodium molybdate, 1 part by weight of citric acid, 1.5 parts by weight of fulvic acid and the balance of water.
Further, the preparation method of the plant nutrition conditioner comprises the steps of putting potassium humate and half of urea into a reactor filled with a small amount of water, gradually heating to 70-80 ℃, and keeping stirring for later use; meanwhile, dissolving trace elements such as zinc sulfate, manganese sulfate, ferrous sulfate and the like in other reactors, adding the remaining half of urea and citric acid, injecting the mixture into a potassium humate aqueous solution after full reaction, fully stirring, adding gamma-polyglutamic acid and fulvic acid after the temperature is reduced, and filtering to obtain the product.
Further, the separant is one or more of dextrin, starch, cellulose, water-soluble salt and polysaccharide.
Further, the secondary element compound comprises 3-4 parts by weight of calcium nitrate, 1.5-2.5 parts by weight of IDHA-calcium, 3-4 parts by weight of beet molasses, 0.4-1 part by weight of calcium humate, 0.4-1 part by weight of IDHA-magnesium, 20.1-0.3 part by weight of vitamin B, 1-2 parts by weight of anhydrous magnesium sulfate, 2-3 parts by weight of yeast extract and 1-2 parts by weight of diisooctyl maleate sodium sulfonate.
Further, the preparation process of the medium elements comprises the following steps of firstly, preparing calcium nitrate, IDHA-calcium, beet molasses, calcium humate, IDHA-magnesium, vitamin B2, anhydrous magnesium sulfate, yeast extract and sodium diisooctyl maleate sulfonate according to parts by weight; then adding the raw materials and water into a reaction kettle, stirring, heating to 60 ℃, and reacting for 30min to obtain a medium element aqueous solution; and finally, putting the medium element aqueous solution into a drying machine, and drying at the temperature of 70 ℃ to obtain the medium element compound.
Further, the trace element compound comprises, by weight, 4-6 parts of copper sulfate, 5-8 parts of ferric sulfate, 0.5-0.8 part of borax, 0.2-0.4 part of ammonium molybdate, 0.5-0.8 part of EDTA-manganese and 1.2-2 parts of EDTA-zinc, and the raw materials are uniformly mixed according to a proportion to obtain the trace element compound.
The invention also provides a preparation method of the synergistic seaweed fertilizer with an effervescent function, which comprises the following steps:
s1, mixing the nitrogenous fertilizer, the phosphate fertilizer, the potash fertilizer and the seaweed fermentation residues according to the weight ratio to obtain a mixed material, putting the mixed material into a grinder to be ground until the particle fineness is 110 meshes, adding water into the mixed material according to the addition of 7 kg/ton, and uniformly stirring;
s2, adding the fermented alginic acid synergistic solution, the medium element compound and the trace element compound into the slurry prepared in the step according to the weight ratio in a granulation tower with the steam temperature of 100 ℃, spraying the obtained eutectic substance out through a rotating spray head at the top end of the granulation tower, controlling the hot air temperature to be 220 ℃ during the falling process of the eutectic substance for instant drying, slowly falling to the bottom of the tower under the action of the rising air flow resistance, and completing granulation;
s3, taking potassium carbonate and a separant according to the weight ratio, mixing the potassium carbonate and the separant with the granulated fertilizer particles, grinding the mixture into powder of 250-350 microns, uniformly stirring, and compressing the obtained mixed powder into tablets.
The invention has the beneficial effects that:
1) by adding potassium carbonate and alginic acid into the fertilizer, after fertilization and watering, acid-base reaction can occur to generate carbon dioxide which can be used as a raw material for plant photosynthesis and can enhance the plant photosynthesis effect.
2) Because the potassium carbonate is added into the fertilizer, the effervescent fertilizer has an effervescent effect after meeting water, can accelerate the dissolution of the fertilizer, can shorten the dissolution time of the fertilizer in a place with low temperature in the north, and increases the nutrient absorption rate of crops.
3) The fertilizer contains fermented alginic acid synergistic liquid, and the fermented alginic acid is micromolecular alginic acid, has a natural ammonia volatilization inhibition effect, namely a urease inhibition effect, can inhibit urea decomposition, and has a controlled release effect.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be further described with reference to the following preferred embodiments.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. Although methods and materials similar or equivalent to those described herein can be used in experimental or practical applications, the materials and methods are described below. In case of conflict, the present specification, including definitions, will control, and the materials, methods, and examples are illustrative only and not intended to be limiting.
Example 1:
600 parts of nitrogenous fertilizer, 4 parts of fermented alginic acid synergistic solution, 1 part of potassium carbonate, 1 part of separant, 200 parts of phosphate fertilizer, 120 parts of potash fertilizer, 60 parts of medium element compound and 10 parts of trace element compound.
The preparation process of the fermented alginic acid synergistic liquid comprises the following steps of firstly, selecting wild seaweed, airing until the water content is 35%, crushing the wild seaweed into 30 meshes by a crusher, and adding 0.8% of mixed strains; then, mixing the seaweed meal and water according to a weight ratio of 1.5: 1, mixing, uniformly stirring, controlling the temperature to be 70 ℃, and fermenting for 8 days; after fermentation, adding 3.5 times of water into the fermentation material, uniformly stirring, and adjusting the pH to 7.5 by using 35% sodium hydroxide solution; then, the solution is stirred and extracted for 10 hours at the steam controlled temperature of 60 ℃, and finally, the solution is subjected to filter pressing by a filter press, the pH of the obtained filtrate is adjusted to 7 by citric acid, and the filtrate is evaporated and concentrated to 10 percent of the volume of the solution, so that fermented alginic acid extracting solution with the solid content of 5 percent by weight is obtained, and the fermented alginic acid extracting solution is fermented alginic acid synergistic solution with the alginic acid content of 1.3 to 5 percent by weight.
The seaweed fermentation residues are residues obtained by pressure filtration through a pressure filter after the fermentation alginic acid synergistic liquid is extracted, the organic matter content of the residues is 75%, the water content of the residues is 5%, and the residues are crushed to the fineness of 45 meshes.
The seaweed fermentation residues are added with 3 weight percent of iron-zinc preparation, and the iron-zinc preparation consists of 65 weight percent of ferrous sulfate and 35 weight percent of zinc oxide with the purity of 90 percent; the preparation process of the iron-zinc preparation comprises the steps of mixing ferrous sulfate and zinc oxide according to a proportion, adding 50 times of a water solution containing 5% of amino acid by volume, adding phosphoric acid with the volume ratio of 0.9% and the molar concentration of 50%, heating to 150 ℃ under 1.7 atmospheric pressure, and preserving heat for 6 hours.
The mixed strain is a mixture consisting of 55% of Bacillus subtilis powder, 27% of saccharomycete powder and 18% of Aspergillus niger powder, and the effective spore number of the mixed strain is not less than 2.5 × 1011cfu。
The nitrogen fertilizer comprises, by weight, 10 parts of ammonium chloride, 0.1 part of ammonium sulfate, 0.01 part of acetohydroxamic acid, 0.01 part of compound amino acid and 0.01 part of dicyandiamide. The preparation method of the nitrogen fertilizer specifically comprises the steps of fully mixing ammonium chloride, ammonium sulfate, acetohydroxamic acid, compound amino acid and dicyandiamide, spraying a proper amount of water in a disc granulator for granulation, and drying to obtain the nitrogen fertilizer.
The preparation method of the phosphate fertilizer comprises the following steps of firstly, uniformly mixing a formula which comprises 13% of bacillus subtilis, 10% of bacillus licheniformis, 40% of cellulose streptomyces and 37% of aspergillus versicolor by weight percent to form a flora; then mixing and stirring uniformly according to the formula of 40% of active organic material, 40% of rice bran, 16% of soybean meal, 2% of milk powder, 1% of sugar and the balance of water by weight percent to obtain a flora secondary culture medium; inoculating flora in a secondary flora culture medium at normal temperature, wherein the temperature of the culture medium is 60 ℃, the pH value is 7.0, the culture time is 5 days, and active bran bacteria of the flora are obtained after the culture is mature, and the viable bacteria content can reach 30 hundred million/g; and finally, uniformly mixing the phosphate rock powder 20 wt%, the active organic material 40 wt% and the active bran bacteria 40 wt%, fermenting at normal temperature for more than 12 days, crushing, and packaging to obtain the phosphate fertilizer.
The preparation method of the potash fertilizer comprises the following steps of taking 80 parts by weight of potassium sulfate, 25 parts by weight of treated oyster shell powder and 1 part by weight of plant nutrition conditioner, uniformly mixing the raw materials, and extruding and granulating the mixture by a drum rolling device to obtain the potash fertilizer.
The plant nutrition conditioner comprises, by weight, 2 parts of gamma-polyglutamic acid, 5 parts of potassium humate, 10 parts of urea, 1 part of zinc sulfate, 0.2 part of manganese sulfate, 3 parts of ferrous sulfate, 0.5 part of boric acid, 0.1 part of sodium molybdate, 1 part of citric acid, 1.5 parts of fulvic acid and the balance of water.
The preparation method of the plant nutrition conditioner comprises the steps of putting potassium humate and half of urea into a reactor filled with a small amount of water, gradually heating to 70 ℃, and keeping stirring for later use; meanwhile, dissolving trace elements such as zinc sulfate, manganese sulfate, ferrous sulfate and the like in other reactors, adding the remaining half of urea and citric acid, injecting the mixture into a potassium humate aqueous solution after full reaction, fully stirring, adding gamma-polyglutamic acid and fulvic acid after the temperature is reduced, and filtering to obtain the product.
The separant is a mixture of dextrin and starch. The medium element compound comprises 3 parts of calcium nitrate, 1.5 parts of IDHA-calcium, 3 parts of beet molasses, 0.4 part of calcium humate, 0.4 part of IDHA-magnesium, 20.1 parts of vitamin B, 1 part of anhydrous magnesium sulfate, 2 parts of yeast extract and 1 part of sodium diisooctyl maleate sulfonate by weight ratio.
The preparation process of the medium elements comprises the following steps of firstly, preparing calcium nitrate, IDHA-calcium, beet molasses, calcium humate, IDHA-magnesium, vitamin B2, anhydrous magnesium sulfate, yeast extract and sodium diisooctyl maleate sulfonate according to mass percentage; then adding the raw materials and water into a reaction kettle, stirring, heating to 60 ℃, and reacting for 30min to obtain a medium element aqueous solution; and finally, putting the medium element aqueous solution into a drying machine, and drying at the temperature of 70 ℃ to obtain the medium element compound.
The trace element compound comprises 4 parts of copper sulfate, 5 parts of ferric sulfate, 0.5 part of borax, 0.2 part of ammonium molybdate, 0.5 part of EDTA-manganese and 1.2 parts of EDTA-zinc by weight ratio, and the raw materials are uniformly mixed according to the proportion to obtain the trace element compound.
A preparation method of a synergistic seaweed fertilizer with an effervescent function comprises the following steps:
s1, mixing the nitrogenous fertilizer, the phosphate fertilizer, the potash fertilizer and the seaweed fermentation residues according to the weight ratio to obtain a mixed material, putting the mixed material into a grinder to be ground until the particle fineness is 110 meshes, adding water into the mixed material according to the addition of 7 kg/ton, and uniformly stirring;
s2, adding the fermented alginic acid synergistic solution, the medium element compound and the trace element compound into the slurry prepared in the step according to the weight ratio in a granulation tower with the steam temperature of 100 ℃, spraying the obtained eutectic substance out through a rotating spray head at the top end of the granulation tower, controlling the hot air temperature to be 220 ℃ during the falling process of the eutectic substance for instant drying, slowly falling to the bottom of the tower under the action of the rising air flow resistance, and completing granulation;
s3, taking potassium carbonate and a separant according to the weight ratio, mixing the potassium carbonate and the separant with the granulated fertilizer particles, grinding the mixture into powder of 250 microns, uniformly stirring, and compressing the obtained mixed powder into tablets.
Example 2:
780 parts of nitrogenous fertilizer, 8 parts of fermented alginic acid synergistic solution, 2 parts of potassium carbonate, 2 parts of separant, 100 parts of phosphate fertilizer, 80 parts of potash fertilizer, 30 parts of secondary element compound and 2 parts of trace element compound.
The preparation process of the fermented alginic acid synergistic liquid comprises the following steps of firstly, selecting wild seaweed, airing until the water content is 45%, crushing the wild seaweed into 50 meshes by a crusher, and adding 0.9% of mixed strains; then, mixing the seaweed meal and water according to a weight ratio of 1.5: 1, mixing, uniformly stirring, controlling the temperature to be 75 ℃, and fermenting for 10 days; after the fermentation is finished, adding 4 times of water into the fermentation material, uniformly stirring, and adjusting the pH to 8.5 by using 35% sodium hydroxide solution; then, the solution is stirred and extracted for 12 hours by steam at the temperature of 65 ℃, finally, the solution is pressed and filtered by a filter press, the pH of the obtained filtrate is adjusted to 7 by citric acid, and the filtrate is evaporated and concentrated to 10 percent of the volume of the solution, so that fermented alginic acid extracting solution with the solid content of 10 percent by weight is obtained, and the fermented alginic acid extracting solution is fermented alginic acid synergistic solution with the alginic acid content of 5 percent by weight.
The seaweed fermentation residues are residues obtained by pressure filtration through a pressure filter after the fermentation alginic acid synergistic liquid is extracted, the organic matter content of the residues is 85 percent, the water content of the residues is 15 percent, and the residues are crushed to the fineness of 45 meshes.
The seaweed fermentation residues are added with 3 weight percent of iron-zinc preparation, and the iron-zinc preparation consists of 65 weight percent of ferrous sulfate and 35 weight percent of zinc oxide with the purity of 90 percent; the preparation process of the iron-zinc preparation comprises the steps of mixing ferrous sulfate and zinc oxide according to a proportion, adding 50 times of a water solution containing 5% of amino acid by volume, adding phosphoric acid with the volume ratio of 0.9% and the molar concentration of 50%, heating to 150 ℃ under 1.7 atmospheric pressure, and preserving heat for 6 hours.
The mixed strain is a mixture consisting of 55% of Bacillus subtilis powder, 27% of saccharomycete powder and 18% of Aspergillus niger powder, and the effective spore number of the mixed strain is not less than 2.5 × 1011cfu。
The nitrogen fertilizer comprises 96 parts by weight of ammonium chloride, 78.8 parts by weight of ammonium sulfate, 8 parts by weight of attapulgite powder, 0.02 part by weight of acetohydroxamic acid, 1 part by weight of compound amino acid and 0.2 part by weight of dicyandiamide. The preparation method of the nitrogen fertilizer specifically comprises the steps of fully mixing ammonium chloride, ammonium sulfate, attapulgite powder (containing magnesium aluminum silicate), acetohydroxamic acid, compound amino acid and dicyandiamide, spraying a proper amount of water in a disc granulator for granulation, and drying to obtain the nitrogen fertilizer.
The preparation method of the phosphate fertilizer comprises the following steps of firstly, uniformly mixing a formula which comprises 13% of bacillus subtilis, 10% of bacillus licheniformis, 40% of cellulose streptomyces and 37% of aspergillus versicolor by weight percent to form a flora; then mixing and stirring uniformly according to the formula of 40% of active organic material, 40% of rice bran, 16% of soybean meal, 2% of milk powder, 1% of sugar and the balance of water by weight percent to obtain a flora secondary culture medium; inoculating flora in a secondary flora culture medium at normal temperature, wherein the temperature of the culture medium is 60 ℃, the pH value is 7.0, the culture time is 5 days, and active bran bacteria of the flora are obtained after the culture is mature, and the viable bacteria content can reach 30 hundred million/g; and finally, uniformly mixing the phosphate rock powder 20 wt%, the active organic material 40 wt% and the active bran bacteria 40 wt%, fermenting at normal temperature for more than 12 days, crushing, and packaging to obtain the phosphate fertilizer.
The preparation method of the potash fertilizer comprises the following steps of taking 80 parts by weight of potassium sulfate, 25 parts by weight of treated oyster shell powder and 1 part by weight of plant nutrition conditioner, uniformly mixing the raw materials, and extruding and granulating the mixture by a drum rolling device to obtain the potash fertilizer.
The plant nutrition conditioner comprises 2 parts of gamma-polyglutamic acid, 5 parts of potassium humate, 10 parts of urea, 1 part of zinc sulfate, 0.2 part of manganese sulfate, 3 parts of ferrous sulfate, 0.5 part of boric acid, 0.1 part of sodium molybdate, 1 part of citric acid, 1.5 parts of fulvic acid and the balance of water by weight.
The preparation method of the plant nutrition conditioner comprises the steps of putting potassium humate and half of urea into a reactor filled with a small amount of water, gradually heating to 70-80 ℃, and keeping stirring for later use; meanwhile, dissolving trace elements such as zinc sulfate, manganese sulfate, ferrous sulfate and the like in other reactors, adding the remaining half of urea and citric acid, injecting the mixture into a potassium humate aqueous solution after full reaction, fully stirring, adding gamma-polyglutamic acid and fulvic acid after the temperature is reduced, and filtering to obtain the product.
The release agent is a mixture of cellulose and polysaccharide. The medium element compound comprises 4 parts of calcium nitrate, 2.5 parts of IDHA-calcium, 4 parts of beet molasses, 1 part of calcium humate, 1 part of IDHA-magnesium, 20.3 parts of vitamin B, 2 parts of anhydrous magnesium sulfate, 3 parts of yeast extract and 2 parts of diisooctyl maleate sodium sulfonate according to weight ratio.
The preparation process of the medium elements comprises the following steps of firstly, preparing calcium nitrate, IDHA-calcium, beet molasses, calcium humate, IDHA-magnesium, vitamin B2, anhydrous magnesium sulfate, yeast extract and sodium diisooctyl maleate sulfonate according to mass percentage; then adding the raw materials and water into a reaction kettle, stirring, heating to 60 ℃, and reacting for 30min to obtain a medium element aqueous solution; and finally, putting the medium element aqueous solution into a drying machine, and drying at the temperature of 70 ℃ to obtain the medium element compound.
The trace element compound comprises 6 parts of copper sulfate, 8 parts of ferric sulfate, 0.8 part of borax, 0.4 part of ammonium molybdate, 0.8 part of EDTA-manganese and 2 parts of EDTA-zinc by weight ratio, and the raw materials are uniformly mixed according to the proportion to obtain the trace element compound.
A preparation method of a synergistic seaweed fertilizer with an effervescent function comprises the following steps:
s1, mixing the nitrogenous fertilizer, the phosphate fertilizer, the potash fertilizer and the seaweed fermentation residues according to the weight ratio to obtain a mixed material, putting the mixed material into a grinder to be ground until the particle fineness is 110 meshes, adding water into the mixed material according to the addition of 7 kg/ton, and uniformly stirring;
s2, adding the fermented alginic acid synergistic solution, the medium element compound and the trace element compound into the slurry prepared in the step according to the weight ratio in a granulation tower with the steam temperature of 100 ℃, spraying the obtained eutectic substance out through a rotating spray head at the top end of the granulation tower, controlling the hot air temperature to be 220 ℃ during the falling process of the eutectic substance for instant drying, slowly falling to the bottom of the tower under the action of the rising air flow resistance, and completing granulation;
s3, taking potassium carbonate and a separant according to the weight ratio, mixing the potassium carbonate and the separant with the granulated fertilizer particles, grinding the mixture into 350-micron powder, uniformly stirring, and compressing the obtained mixed powder into tablets.
Example 3:
700 parts of nitrogenous fertilizer, 6 parts of fermented alginic acid synergistic solution, 2 parts of potassium carbonate, 2 parts of separant, 150 parts of phosphate fertilizer, 100 parts of potash fertilizer, 45 parts of secondary element compound and 6 parts of trace element compound.
The preparation process of the fermented alginic acid synergistic liquid comprises the following steps of firstly, selecting wild seaweed, airing until the water content is 40%, crushing the wild seaweed into 40 meshes by a crusher, and adding 0.9% of mixed strains; then, mixing the seaweed meal and water according to a weight ratio of 1.5: 1, mixing, uniformly stirring, controlling the temperature to be 75 ℃, and fermenting for 9 days; after the fermentation is finished, adding 4 times of water into the fermentation material, uniformly stirring, and adjusting the pH to 8 by using 35% sodium hydroxide solution; then, the solution is stirred and extracted for 11 hours by steam at the temperature of 63 ℃, finally, the solution is pressed and filtered by a filter press, the pH of the obtained filtrate is adjusted to 7 by citric acid, and the filtrate is evaporated and concentrated to 10 percent of the volume of the solution, so that fermented alginic acid extracting solution with the solid content of 7 percent by weight is obtained, and the fermented alginic acid extracting solution is fermented alginic acid synergistic solution with the alginic acid content of 3.3 percent by weight.
The seaweed fermentation residues are residues obtained by pressure filtration through a pressure filter after the fermentation alginic acid synergistic liquid is extracted, the organic matter content of the residues is 80%, the water content of the residues is 10%, and the residues are crushed to the fineness of 45 meshes.
The seaweed fermentation residues are added with 3 weight percent of iron-zinc preparation, and the iron-zinc preparation consists of 65 weight percent of ferrous sulfate and 35 weight percent of zinc oxide with the purity of 90 percent; the preparation process of the iron-zinc preparation comprises the steps of mixing ferrous sulfate and zinc oxide according to a proportion, adding 50 times of a water solution containing 5% of amino acid by volume, adding phosphoric acid with the volume ratio of 0.9% and the molar concentration of 50%, heating to 150 ℃ under 1.7 atmospheric pressure, and preserving heat for 6 hours.
The mixed strain is a mixture consisting of 55% of Bacillus subtilis powder, 27% of saccharomycete powder and 18% of Aspergillus niger powder, and the effective spore number of the mixed strain is not less than 2.5 × 1011cfu。
The nitrogen fertilizer comprises 75 parts by weight of ammonium chloride, 55 parts by weight of ammonium sulfate, 4 parts by weight of attapulgite powder, 0.02 part by weight of acetohydroxamic acid, 0.6 part by weight of compound amino acid and 0.15 part by weight of dicyandiamide. The preparation method of the nitrogen fertilizer specifically comprises the steps of fully mixing ammonium chloride, ammonium sulfate, attapulgite powder (containing magnesium aluminum silicate), acetohydroxamic acid, compound amino acid and dicyandiamide, spraying a proper amount of water in a disc granulator for granulation, and drying to obtain the nitrogen fertilizer.
The preparation method of the phosphate fertilizer comprises the following steps of firstly, uniformly mixing a formula which comprises 13% of bacillus subtilis, 10% of bacillus licheniformis, 40% of cellulose streptomyces and 37% of aspergillus versicolor by weight percent to form a flora; then mixing and stirring uniformly according to the formula of 40% of active organic material, 40% of rice bran, 16% of soybean meal, 2% of milk powder, 1% of sugar and the balance of water by weight percent to obtain a flora secondary culture medium; inoculating flora in a secondary flora culture medium at normal temperature, wherein the temperature of the culture medium is 60 ℃, the pH value is 7.0, the culture time is 5 days, and active bran bacteria of the flora are obtained after the culture is mature, and the viable bacteria content can reach 30 hundred million/g; and finally, uniformly mixing the phosphate rock powder 20 wt%, the active organic material 40 wt% and the active bran bacteria 40 wt%, fermenting at normal temperature for more than 12 days, crushing, and packaging to obtain the phosphate fertilizer.
The preparation method of the potash fertilizer comprises the following steps of taking 80 parts by weight of potassium sulfate, 25 parts by weight of treated oyster shell powder and 1 part by weight of plant nutrition conditioner, uniformly mixing the raw materials, and extruding and granulating the mixture by a drum rolling device to obtain the potash fertilizer.
The plant nutrition conditioner comprises 2 parts of gamma-polyglutamic acid, 5 parts of potassium humate, 10 parts of urea, 1 part of zinc sulfate, 0.2 part of manganese sulfate, 3 parts of ferrous sulfate, 0.5 part of boric acid, 0.1 part of sodium molybdate, 1 part of citric acid, 1.5 parts of fulvic acid and the balance of water by weight.
The preparation method of the plant nutrition conditioner comprises the steps of putting potassium humate and half of urea into a reactor filled with a small amount of water, gradually heating to 70-80 ℃, and keeping stirring for later use; meanwhile, dissolving trace elements such as zinc sulfate, manganese sulfate, ferrous sulfate and the like in other reactors, adding the remaining half of urea and citric acid, injecting the mixture into a potassium humate aqueous solution after full reaction, fully stirring, adding gamma-polyglutamic acid and fulvic acid after the temperature is reduced, and filtering to obtain the product.
The release agent is a water-soluble salt. The medium element compound comprises 4 parts of calcium nitrate, 2 parts of IDHA-calcium, 4 parts of beet molasses, 0.8 part of calcium humate, 0.8 part of IDHA-magnesium, 20.2 parts of vitamin B, 2 parts of anhydrous magnesium sulfate, 3 parts of yeast extract and 2 parts of sodium diisooctyl maleate sulfonate according to weight ratio.
The preparation process of the medium elements comprises the following steps of firstly, preparing calcium nitrate, IDHA-calcium, beet molasses, calcium humate, IDHA-magnesium, vitamin B2, anhydrous magnesium sulfate, yeast extract and sodium diisooctyl maleate sulfonate according to mass percentage; then adding the raw materials and water into a reaction kettle, stirring, heating to 60 ℃, and reacting for 30min to obtain a medium element aqueous solution; and finally, putting the medium element aqueous solution into a drying machine, and drying at the temperature of 70 ℃ to obtain the medium element compound.
The trace element compound comprises, by weight, 5 parts of copper sulfate, 7 parts of ferric sulfate, 0.7 part of borax, 0.3 part of ammonium molybdate, 0.6 part of EDTA-manganese and 1.8 parts of EDTA-zinc, and the raw materials are uniformly mixed according to a proportion to obtain the trace element compound.
A preparation method of a synergistic seaweed fertilizer with an effervescent function comprises the following steps:
s1, mixing the nitrogenous fertilizer, the phosphate fertilizer, the potash fertilizer and the seaweed fermentation residues according to the weight ratio to obtain a mixed material, putting the mixed material into a grinder to be ground until the particle fineness is 110 meshes, adding water into the mixed material according to the addition of 7 kg/ton, and uniformly stirring;
s2, adding the fermented alginic acid synergistic solution, the medium element compound and the trace element compound into the slurry prepared in the step according to the weight ratio in a granulation tower with the steam temperature of 100 ℃, spraying the obtained eutectic substance out through a rotating spray head at the top end of the granulation tower, controlling the hot air temperature to be 220 ℃ during the falling process of the eutectic substance for instant drying, slowly falling to the bottom of the tower under the action of the rising air flow resistance, and completing granulation;
s3, taking potassium carbonate and a separant according to the weight ratio, mixing the potassium carbonate and the separant with the granulated fertilizer particles, grinding the mixture into powder of 300 microns, uniformly stirring, and compressing the obtained mixed powder into tablets.
Example 4
Application test
Test site: the test is carried out in a base net room at a test base in Qingdao city, Shandong province. The region belongs to a warm-temperate zone semi-humid monsoon climate, the soil matrix is yellow river drift, the soil type is moist soil, the plough layer is light, and the fertility index of the foundation soil is organic matter10.50g/kg, 53.5mg/kg available nitrogen, fast-acting phosphorus (P)2O5)14.6mg/kg, quick acting potassium (K)2O)70mg/kg, belongs to medium and high fertility soil, and has wide representativeness in summer corn planting areas in China.
Test time: 3 months in 2019-7 months in 2019
And (3) test crops: rice (Oryza sativa L.) with improved resistance to stress
Test protocol: the fertilizers used in the tests consisted of two large treatment groups of the seaweed fertilizer produced in example 1, example 2, example 3 of the present invention and a control (a commercial common fertilizer sample).
A total of 4 small treatment groups were designed for this trial, numbered respectively as treatment 1 (using the seaweed fertilizer sample prepared in inventive example 1), treatment 2 (using the seaweed fertilizer sample prepared in inventive example 2), treatment 3 (using the seaweed fertilizer sample prepared in inventive example 3), and treatment 4 (using an equivalent amount of a commercially available conventional fertilizer sample for the control). Sowing in 3, 2 and 2019, and mechanically transplanting in 3, 16 and 2019. The test results are shown in table 1.
TABLE 1 comparison of seaweed fertilizers of the invention with commercial conventional fertilizers
The results in Table 1 show that the seaweed fertilizer of the present invention increases the yield of rice to some extent as compared with the control. Wherein, the yield increase effect of the embodiment 1 is the most remarkable, the yield per mu is increased by 85.5kg, the yield is increased by 14.1 percent, and the embodiment 2 is followed. Meanwhile, the seaweed fertilizer sample provided by the invention obviously improves the effective spike number of rice, and the effective spike numbers of the examples 1, 2 and 3 are respectively 14.1%, 11.7% and 9.2% higher than those of the comparative example. The seaweed fertilizer sample of the invention obviously improves the thousand-grain weight of rice, and the thousand-grain weight of the examples 1, 2 and 3 is respectively 7.7 percent, 7.2 percent and 4.4 percent higher than that of the comparative example. Therefore, the seaweed fertilizer sample provided by the invention promotes the vegetative growth and reproductive growth of rice, and improves the effective spike number and thousand kernel weight of the rice, thereby improving the yield and quality of the rice.
Example 5
Effect of applying the seaweed fertilizers prepared in example 1 and example 2 on the growth of Chinese cabbage
Purpose of the experiment: the seaweed fertilizers prepared in the embodiment 1 and the embodiment 2 are used for planting Chinese cabbages, and the using effect of high yield and high quality is achieved by measuring the related agronomic characters of the Chinese cabbages.
The test varieties are: when the field is cultivated with a vegetable variety, Chinese cabbage.
Fertilizer to be tested: the seaweed fertilizer prepared in example 1;
the seaweed fertilizer prepared in example 2;
a conventional compound fertilizer.
Exemplarily, selecting: selecting the land blocks with uniform fertility and good illumination and irrigation conditions.
The test method comprises the following steps: selecting Chinese cabbage as a main planting crop in the current region, sowing the Chinese cabbage in 2019 in 12 th and 17 th days, and harvesting the Chinese cabbage in 2020 in 1 st and 30 th days. The seaweed fertilizers of example 1 and example 2 were used as demonstration 1 and demonstration 2, respectively, and the conventional fertilization treatment was used as a control. Each treatment was repeated 3 times, during which the remaining field management measures were consistent. Set 6 cells with the area of 30.2m2。
And (3) result statistics and analysis:
TABLE 2 influence of different fertilization treatments on the agronomic traits and yield of cabbage
| Treatment of | Plant height (cm) | Leaf length (cm) | Leaf width (cm) | Chlorophyll content | Yield (kg/mu) |
| Control | 22.21 | 16.80 | 7.98 | 34.56 | 1730.20 |
| Demonstration 1 | 28.10 | 19.25 | 8.78 | 36.78 | 2815.34 |
| Demonstration 2 | 28.32 | 19.63 | 8.67 | 36.66 | 2831.21 |
From the results of table 2, it can be seen that: the growth vigor of the cabbages treated in the demonstration 1 area and the demonstration 2 area is better than that of the cabbages treated in the control area, and the yield of the cabbages applied with the seaweed fertilizer of the embodiment 1 is increased by 62.7 percent compared with that of the cabbages treated in the control area; the yield of the chinese cabbage to which the algal fertilizer of example 2 was applied was increased by 63.6% compared to the control-treated chinese cabbage. The results of the Chinese cabbages processed by the comprehensive control area and the demonstration area can be known as follows: under the condition that other conditions are not similar, the plant height and the leaf length of the demonstration area are superior to those of the comparison area, and the biomass is far higher than that of the comparison area.
The above detailed description is only for the preferred embodiment of the present invention, and the present invention should not be limited to the embodiment, i.e. all equivalent changes and modifications should be made within the scope of the present invention.
Claims (10)
1. The synergistic seaweed fertilizer with the effervescent function is characterized by being prepared from the following raw materials in parts by weight: 780 parts of nitrogen fertilizer 600-containing organic fertilizer, 4-8 parts of fermented alginic acid synergistic liquid, 1-2 parts of potassium carbonate, 1-2 parts of separant, 200 parts of phosphate fertilizer 100-containing organic fertilizer, 80-120 parts of potassium fertilizer, 30-60 parts of medium element compound and 2-10 parts of trace element compound.
2. The synergistic seaweed fertilizer with effervescent effect as claimed in claim 1, wherein the preparation process of the fermented alginic acid synergistic solution comprises the steps of firstly selecting wild seaweed, airing until the water content is 35% -45%, pulverizing to 30-50 meshes by a pulverizer, and adding 0.8-0.9% of mixed strains; then, mixing the seaweed meal and water according to a weight ratio of 1.5: 1, mixing, uniformly stirring, controlling the temperature to be 70-75 ℃, and fermenting for 8-10 days; after fermentation, adding 3.5-4 times of water into the fermented material, stirring uniformly, and adjusting the pH to 7.5-8.5 by using 35% sodium hydroxide solution; then, the solution is stirred and extracted for 10 to 12 hours at the steam controlled temperature of 60 to 65 ℃, finally, the solution is pressed and filtered by a filter press, the pH of the obtained filtrate is adjusted to 7 by citric acid, and the filtrate is evaporated and concentrated to 10 percent of the volume of the solution, so that fermented alginic acid extracting solution with the solid content of 5 to 10 percent by weight is obtained, and the fermented alginic acid extracting solution is fermented alginic acid synergistic solution with the alginic acid content of 1.3 to 5 percent by weight.
3. The synergistic seaweed fertilizer with an effervescent function as claimed in claim 1, wherein the nitrogen fertilizer comprises, by weight, 10-96 parts of ammonium chloride, 0.1-78.8 parts of ammonium sulfate, 0-8 parts of attapulgite powder, 0.01-0.02 part of acetohydroxamic acid, 0.01-1 part of compound amino acid and 0.01-0.2 part of dicyandiamide;
the preparation method of the nitrogen fertilizer specifically comprises the steps of fully mixing ammonium chloride, ammonium sulfate, attapulgite powder (containing magnesium aluminum silicate), acetohydroxamic acid, compound amino acid and dicyandiamide, spraying a proper amount of water in a disc granulator for granulation, and drying to obtain the nitrogen fertilizer.
4. The synergistic seaweed fertilizer with effervescence as claimed in claim 1, wherein the preparation method of the phosphate fertilizer is characterized in that firstly, the ingredients with the weight percentage of 13 percent of bacillus subtilis, 10 percent of bacillus licheniformis, 40 percent of cellulose streptomyces and 37 percent of aspergillus versicolor are mixed evenly to form flora; then mixing and stirring uniformly according to the formula of 40% of active organic material, 40% of rice bran, 16% of soybean meal, 2% of milk powder, 1% of sugar and the balance of water by weight percent to obtain a flora secondary culture medium; inoculating flora in a secondary flora culture medium at normal temperature, wherein the temperature of the culture medium is 60 ℃, the pH value is 7.0, the culture time is 5 days, and active bran bacteria of the flora are obtained after the culture is mature, and the viable bacteria content can reach 30 hundred million/g; and finally, uniformly mixing the phosphate rock powder 20 wt%, the active organic material 40 wt% and the active bran bacteria 40 wt%, fermenting at normal temperature for more than 12 days, crushing, and packaging to obtain the phosphate fertilizer.
5. The synergistic seaweed fertilizer with an effervescent function as claimed in claim 1, wherein the isolating agent is one or more of dextrin, starch, cellulose, water-soluble salt and polysaccharide.
6. The synergistic seaweed fertilizer with the effervescent function is characterized in that the preparation method of the potash fertilizer is specifically that 80 parts by weight of potassium sulfate, 25 parts by weight of processed oyster shell powder and 1 part by weight of plant nutrient conditioner are taken, and all the raw materials are uniformly mixed and extruded and granulated by a drum rolling device to obtain the potash fertilizer;
the plant nutrition conditioner comprises 2 parts of gamma-polyglutamic acid, 5 parts of potassium humate, 10 parts of urea, 1 part of zinc sulfate, 0.2 part of manganese sulfate, 3 parts of ferrous sulfate, 0.5 part of boric acid, 0.1 part of sodium molybdate, 1 part of citric acid, 1.5 parts of fulvic acid and the balance of water by weight;
the preparation method of the plant nutrition conditioner comprises the steps of putting potassium humate and half of urea into a reactor filled with a small amount of water, gradually heating to 70-80 ℃, and keeping stirring for later use; meanwhile, dissolving trace elements such as zinc sulfate, manganese sulfate, ferrous sulfate and the like in other reactors, adding the remaining half of urea and citric acid, injecting the mixture into a potassium humate aqueous solution after reaction, stirring, adding gamma-polyglutamic acid and fulvic acid after the temperature is reduced, and filtering to obtain the product.
7. The synergistic seaweed fertilizer with effervescence as claimed in claim 1, wherein the medium element compounds comprise 3-4 parts by weight of calcium nitrate, 1.5-2.5 parts by weight of IDHA-calcium, 3-4 parts by weight of beet molasses, 0.4-1 part by weight of calcium humate, 0.4-1 part by weight of IDHA-magnesium, 20.1-0.3 part by weight of vitamin B, 1-2 parts by weight of anhydrous magnesium sulfate, 2-3 parts by weight of yeast extract and 1-2 parts by weight of sodium diisooctyl maleate sulfonate.
8. The synergistic seaweed fertilizer with effervescence as claimed in claim 7, wherein the medium elements are prepared by preparing calcium nitrate, IDHA-calcium, beet molasses, calcium humate, IDHA-magnesium, vitamin B2, anhydrous magnesium sulfate, yeast extract and sodium diisooctyl maleate sulfonate in parts by weight; then adding the raw materials and water into a reaction kettle, stirring, heating to 60 ℃, and reacting for 30min to obtain a medium element aqueous solution; and finally, putting the medium element aqueous solution into a drying machine, and drying at the temperature of 70 ℃ to obtain the medium element compound.
9. The synergistic seaweed fertilizer with effervescence as claimed in claim 1, wherein the trace element compound comprises, by weight, 4-6 parts of copper sulfate, 5-8 parts of ferric sulfate, 0.5-0.8 part of borax, 0.2-0.4 part of ammonium molybdate, 0.5-0.8 part of EDTA-manganese and 1.2-2 parts of EDTA-zinc, and the raw materials are uniformly mixed in proportion to obtain the trace element compound.
10. A preparation method of a synergistic seaweed fertilizer with an effervescent function is characterized by comprising the following steps:
s1, mixing the nitrogenous fertilizer, the phosphate fertilizer, the potash fertilizer and the seaweed fermentation residues according to the weight ratio to obtain a mixed material, putting the mixed material into a grinder to be ground until the particle fineness is 110 meshes, adding water into the mixed material according to the addition of 7 kg/ton, and uniformly stirring;
s2, adding the fermented alginic acid synergistic solution, the medium element compound and the trace element compound into the slurry prepared in the step according to the weight ratio in a granulation tower with the steam temperature of 100 ℃, spraying the obtained eutectic substance out through a rotating spray head at the top end of the granulation tower, controlling the hot air temperature to be 220 ℃ during the falling process of the eutectic substance for instant drying, slowly falling to the bottom of the tower under the action of the rising air flow resistance, and completing granulation;
s3, taking potassium carbonate and a separant according to the weight ratio, mixing the potassium carbonate and the separant with the granulated fertilizer particles, grinding the mixture into powder of 250-350 microns, uniformly stirring, and compressing the obtained mixed powder into tablets.
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