2680results about "Liquid fertilisers" patented technology

The invention relates to the field of fertilizers, in particular to a macroelement water-soluble fertilizer and a preparation method thereof.The preparation method comprises the steps that a composite biochar material is prepared from biochar, loaded metal modified biochar and an iron metal material, and then the composite biochar material is compounded with tripotassium phosphate, monopotassium phosphate, disodium octoborate tetrahydrate, zinc sulfate monohydrate and the like; the finally prepared fertilizer can realize accurate fertilizer supply, the iron metal organic framework material efficiently converts nitrate nitrogen into ammonium nitrogen and cooperates with a large amount of trace elements such as tripotassium phosphate, the requirements of crops at all stages are met, nutrients in key periods are guaranteed, pores of the composite biochar material adsorb the nutrients, nutrient slow release is realized, root system interpenetration resistance is reduced, stress resistance is enhanced, and the yield of the crops is increased. The soil conditioner has the advantages of simple preparation process, reduction of growth hindrance, optimization of soil aggregates, increase of pores, reduction of volume weight, improvement of ventilation, water permeability and water and fertilizer retention capabilities, substantial agricultural economy energization, substantial yield increase of crops, and wide application prospects.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to enhance the drought-tolerance of the cotton plant. By selectively choosing specific weights of feathers and water, and treating the mixture, though one embodiment does not have water mixed in, to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then applied to the cotton seeds and the soil around the cotton plants. Optionally, the KHP solution can be diluted by water, as taught in the specification, before applying to the seeds and the soil as taught herein.

The invention discloses a soilless culture nutrient solution containing a solid hydrogen supply material and an irrigation method and system. Raw materials of the soilless culture nutrient solution comprise the solid hydrogen supply material, a nutrient solution and a pH regulator. The use amount of the solid hydrogen supply material is 0.05-5 mmol / L; the dosage of the pH regulator is 0.01 to 50 mmol; all the raw materials are mixed, and the soilless culture nutrient solution with the irrigation hydrogen concentration larger than or equal to 500 ppb / L and the pH value of 5-8 is provided. On the basis of applying the soilless culture nutrient solution, the pH value and the hydrogen concentration of the soilless culture nutrient solution are monitored in real time, and the pH value and the hydrogen concentration of the soilless culture nutrient solution are adjusted and controlled by adjusting and controlling at least one of the applying amount of the soilless culture nutrient solution, the applying speed of the soilless culture nutrient solution, the using amount of a solid hydrogen supply material and the using amount of a pH adjusting agent. The hydrogen-rich nutrient solution can be controllably provided for soilless culture plants, stable release of hydrogen and proper adjustment of the pH value and nutritional ingredients are achieved, and the requirements of different crops and different growth stages are met.

The invention belongs to the technical field of agricultural production, and particularly relates to application of Chinese wolfberry-liquorice-based carbon quantum dots MIX to wheat. According to the preparation method, two raw materials including fructus lycii and radix glycyrrhizae are utilized, and the fructus lycii-radix glycyrrhizae-based carbon quantum dots MIX are synthesized through a hydrothermal synthesis method. The raw materials are cheap and easy to obtain, the synthesis method is simple and convenient, the synthesized nanometer material can be used after being simply centrifuged, and then the quality of wheat grains can be effectively improved after the wolfberry-liquorice-based carbon quantum dots MIX are sprayed to the upper middle portion of wheat.

The invention discloses a humic acid liquid fertilizer and a preparation method and application thereof, and belongs to the technical field of liquid fertilizers, organic waste and ferric oxide are ball-milled and mixed, transferred into a muffle furnace, roasted for 2-2.5 h at 280-310 DEG C under nitrogen protection, transferred into a reaction kettle and stirred and mixed with a 10 wt% hydrogen peroxide aqueous solution and potassium hydroxide powder, and the humic acid liquid fertilizer is obtained. The preparation method comprises the following steps: adding potassium humate into a potassium humate solution, extracting for 40-60 minutes under the assistance of ultrasonic waves, filtering to obtain a potassium humate extract and filter residues, transferring the potassium humate extract into a stirring kettle, adding urea, dipotassium phosphate, a composite carbon dot lubricant and a suspension stabilizer into the stirring kettle, and uniformly mixing to obtain the humic acid liquid fertilizer. The suspension stabilizer can reduce the generation of flocculation and crystallization in the liquid fertilizer, and through the antifriction and lubrication effects of the composite carbon dot lubricant, the friction force between indissolvable solids and water outlet holes of the drip irrigation equipment is reduced, and the risk of blockage of the drip irrigation equipment is reduced.

The invention relates to a culture method for improving duckweed protein, which comprises the following steps: purifying duckweed in a Hoagland working solution to obtain purified duckweed; mixing the biogas slurry with the Hoagland working solution to prepare a duckweed culture solution; wherein the concentration of the biogas slurry is 1.5%-5%, and the concentration of the Hoagland working solution is 95%-98.5%; after the purified duckweed is put into the duckweed culture solution, the duckweed culture solution is put into an incubator with preset culture conditions to be cultured, and the cultured duckweed is obtained. By adding the biogas slurry into the Hoagland working solution, the protein content of the cultured duckweed can be remarkably increased, the biogas slurry can be efficiently utilized, water resources are saved, an ideal way is provided for wastewater recycling, meanwhile, nitrogen and phosphorus in the biogas slurry can be utilized for promoting synthesis of duckweed protein, the protein synthesis efficiency is improved, and the yield of duckweed is increased. And a good basis is provided for feed research of duckweed.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to increase the grape plant's production yield. By selectively choosing specific weights of feathers and water, and treating the mixture, though one embodiment does not have water mixed in, to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then applied to the leaf surface of grape plants at different growth stages. Optionally, the KHP solution can be diluted by water, as taught in the specification, before applying to the leaf surface of the grape plants.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to improve the efficacy of fertilizer usage and absorption by wheat plants. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then infused to the fertilized soil in which the wheat seeds are planted and grown. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, for applying to the soil around the wheat plants.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to improve the efficacy of fertilizer usage and absorption by corn crops. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then infused to the soil in which the corn crops show better growth and development despite fertilizers use may be reduced. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, for applying to the soil around the corn crops.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to improve the growth of wheat under low temperature conditions. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then infused to the soil containing the wheat seeds. Optionally, the KHP solution can be diluted by water, as disclosed in the specification, for applying to the soil containing the wheat seeds.

The invention relates to the technical field of organic fertilizers, and discloses an agricultural waste two-stage fermentation bio-organic fertilizer and a preparation method thereof.The bio-organic fertilizer comprises 70%-80% of a mixture of livestock and poultry manure and straw subjected to anaerobic fermentation and aerobic fermentation two-stage treatment, 5%-10% of auxiliary organic matter, 3%-5% of a soil improvement material, 2%-4% of a functional additive and 1%-3% of a microbial preparation. The preparation method comprises the following steps: mixing the livestock and poultry manure and the straw according to a carbon-nitrogen ratio of 30: 1, and performing pretreatment; carrying out anaerobic fermentation for 7 days, and collecting biogas; performing solid-liquid separation to obtain a solid material and biogas slurry; concentrating the biogas slurry to prepare a leaf fertilizer; adding a microbial preparation into the solid material, and carrying out aerobic fermentation for 10-15 days; after fermentation is completed, drying, functional component adding, granulating, screening and packaging are conducted, a finished product is obtained, collaborative integration of anaerobic-aerobic fermentation and full-quantitative utilization of agricultural waste are achieved, and the method has the remarkable advantages of being short in fermentation period, small in nutrient loss, high in functionality and the like.

Present invention uses a mixture of feathers and water, and, depending on specific embodiments of the ratio between feathers and water, subject the mixture to a high-temperature and high-pressure treatment process for a fixed amount of time, resulting in a keratin solution containing at least 253 peptides, with their molecular masses between 500 and 4,000 Daltons, and the concentration is in the range of 2.0×105˜4.5×105 ppm. The solution can then be further diluted by water for application to different plants, at specific growth stages, following additional steps or processes of application to increase crops yield.

The invention relates to the technical field of organic fertilizers and planting of watermelons and muskmelons, and provides a special fertilizer for milk irrigated watermelons and muskmelons and a double-stubble planting method for sweetness enhancement of milk irrigated watermelons and muskmelons. The special fertilizer for the milk irrigated watermelons and muskmelons comprises black goat manure, sophora alopecuroide, sesame seed meal, bran, organic fresh milk, brown sugar and zymophyte. The black goat manure is pulverized into powder by a pulverizer, the sophora alopecuroide is pulverizedinto 1 cm to 2 cm, and the ratio of the black goat manure, the sophora alopecuroide, the sesame seed meal, the brans, the organic fresh milk, the brown sugar and the zymophyte is 2700-3200: 80: 50: 150: 5: 1. The double-stubble planting method for sweetness enhancement of the milk irrigated watermelons and muskmelons comprises the following steps: selection of a nursery seedling plate and soil, cleaning and germination accelerating of seeds, soil preparation, transplanting, irrigation, topdressing, shaping and forking of watermelon and muskmelon vines and fruit bearing of the watermelons and the muskmelons. The problems that in an existing watermelon and muskmelon planting process, soil nutrients are damaged due to the fact that chemical fertilizers are used for a long time, and the sweetness of melons is reduced are solved.

The invention relates to the field of fertilizers, in particular to a pyroligneous liquor and fulvic acid mixed liquid fertilizer and a preparation method thereof.The pyroligneous liquor and fulvic acid mixed liquid fertilizer is prepared from, by weight, 30-35% of pyroligneous liquor, 25-40% of fulvic acid, 4-6% of amino acid, 5-7% of modified activated carbon and the balance water. The wood vinegar and fulvic acid mixed liquid fertilizer prepared by the invention has good antibacterial performance, and can promote the growth of crops, so that the yield is increased.

The invention discloses a production method of distiller's grain fermentation liquid fertilizer specially applied to roxburgh rose. The distiller's grain fermentation liquid fertilizer is prepared bythe step of evenly mixing 50 to 80 parts of distiller's grain fermentation extracting solution, 0.5 to 1 part of microelement, 5 to 10 parts of seaweed meal, 5 to 10 parts of natural active organism,2 to 5 parts of potassium bicarbonate, 2 to 5 parts of natural active organism and 2 to 5 parts of natural surface active agent. A preparation method of the distiller's grain fermentation extracting solution comprises the steps: evenly stirring 50 to 80 parts of distiller's grain, 50 to 150 parts of rice washing water, 1 to 2 parts of EM microflora fermentation liquid and 0.5 to 1 part of sugar, performing composting fermentation at the room temperature to obtain a distiller's grain fermentation material, stirring and extracting through a sodium carbonate water solution, filtering and performing evaporation and condensation on obtained filtrate until the density is 1.1 to 1.2 to obtain distiller's grain fermentation extracting solution. The distiller's grain fermentation liquid fertilizerdisclosed by the invention has a good use effect, meanwhile can effectively prevent pest and disease damage to the roxburgh rose and is high-efficiency environment-friendly liquid fertilizer.

Present invention teaches the method of using a keratin hydrolysis peptide (“KHP”) solution to improve the growth of tomato under low light conditions. By selectively choosing specific weights of feathers and water, and treating the mixture to a high-temperature high-pressure hydrolysis process, the resulting solution is confirmed to contain at least 253 peptides and then infused to the soil containing the tomato seeds or young seedlings. Optionally, the KHP solution can be diluted by water at different ratios as disclosed in the specification.

The invention discloses a potassium fulvate chelated macroelement water-soluble fertilizer with stress resistance and growth promotion functions, and relates to the technical field of water-soluble fertilizers, the potassium fulvate chelated macroelement water-soluble fertilizer comprises the following raw materials by weight: 167-210 parts of mineral source potassium fulvate, 450-460 parts of potassium nitrate, 300-310 parts of urea, 150-160 parts of potassium dihydrogen phosphate, 30-40 parts of potassium sulfate, 15-25 parts of EDTA-disodium, and 5-15 parts of citric acid. 0.5 to 1.5 parts of brassinolide and 4 to 6 parts of polyaspartic acid; according to the potassium fulvate chelated macroelement water-soluble fertilizer with the stress-resistant and growth-promoting functions, through chelation cooperation of potassium fulvate and nitrogen, phosphorus and potassium, the solubility of the chelated phosphorus element in water is increased, and the chelated phosphorus element can be more uniformly distributed in soil; by adopting an EDTA-disodium and citric acid composite chelating system, volatilization and loss of nitrogen elements are reduced, the problem of precipitation of calcium, magnesium and phosphorus is solved, and the soil conditioner is suitable for hard water areas and especially has outstanding performance in saline-alkali soil and arid areas.

The invention provides a method for preparing carbon quantum dot reinforced subcritical artificial humic acid and applying the carbon quantum dot reinforced subcritical artificial humic acid to a rice field, which comprises the following steps: collecting organic wastes, and drying, grinding and sieving the organic wastes to obtain pretreated raw materials; the preparation method comprises the following steps: mixing pretreated raw materials with water, reacting in a hydrothermal carbonization system at 200-280 DEG C for 1-3 hours, modifying through acid-base pretreatment, adjusting a reaction medium or an additive, and naturally cooling to obtain a natural substance subjected to hydrothermal carbonization; carrying out solid-liquid separation on the natural substance subjected to hydrothermal carbonization by using a 100-mesh coarse filter screen to obtain solid-phase hydrothermal carbon and liquid-phase artificial humic acid; carrying out purification treatment on the liquid-phase artificial humic acid for 48 hours by using a dialysis bag to obtain carbon quantum dots and characterizing the carbon quantum dots; the carbon quantum dot reinforced subcritical artificial humic acid is applied to a rice field, and is additionally applied in a fertilization period. Compared with a traditional composting technology, the scheme has the advantages that the carbon conversion rate is increased by 2-3 times, the soil fertility can be improved, and the rice yield is increased.

The invention relates to the field of preparation of amino acid water-soluble fertilizers, and discloses a method for preparing an amino acid-containing water-soluble fertilizer by using slaughtering blood of bred livestock and poultry, which comprises the following steps: collecting the blood of the bred livestock and poultry in a slaughter house through a blood collection container, and adding an anticoagulant to obtain an anticoagulant raw material; the preparation method comprises the following steps: heating and disinfecting an anticoagulant raw material, and then adding bacillus subtilis and monopotassium phosphate to carry out enzymolysis treatment, so as to obtain a feed liquid after enzymolysis; then filtering, complexing treatment, ultraviolet sterilization treatment and sterilization are carried out in sequence; carrying out amino acid detection on the sterilized material liquid subjected to enzymolysis, and adding other nutrients to form an organic liquid fertilizer containing amino acid; and finally, carrying out preservative treatment, packaging and warehousing, and storing in a shade place to complete the preparation process of the amino acid water-soluble fertilizer. The invention solves the problems that the existing amino acid water-soluble fertilizer preparation raw materials are less, the amino acid water-soluble fertilizer preparation process is longer, and the environment is polluted due to the discharge of livestock and poultry slaughtering blood waste.

The invention provides a method for preparing a nitrogen-rich liquid fertilizer and a soil conditioner from agricultural biomass wastes, and belongs to the technical field of humic acid synthesis. According to the agricultural biomass waste treatment method, nano-bubble nitrogen sources are coupled with agricultural biomass waste for a hydrothermal reaction, and the nitrogen sources in the method serve as additives to provide nitrogen elements to improve the quality of humic acid and serve as catalysts to improve the yield; by adopting a nano bubble solution system, the contact area of a nitrogen source, agricultural biomass waste and water is increased, and the yield and quality of a product are improved. According to the method disclosed by the invention, the quality and yield of humic acid and hydrothermal carbon are improved, the content of nutrient elements such as nitrogen element in the product is increased, the problems of low nitrogen fertilizer utilization rate, single returning nutrient of fulvic acid, humic acid or hydrothermal carbon and the like are solved, and a new thought is provided for resource utilization of agricultural biomass wastes such as straws and the like.

A method of formulating novel humic material is disclosed comprising mixing one or more portions of Dimethylphenylpiperazinium (DMPP) with one or more portions of N-(N-butyl) thiophosphoric triamide (NBPT) with one or more portions of Isobutylidene-diurea (IBDU) with one or more portions of Polyaspartic Acid with one or more portions of Chitosan and a portion of Mycorrhizae and Rhizobia to form a portion of biostimulant material; obtaining a portion of seaweed harvest and crushing and drying said portion of seaweed to form a portion of seaweed powder; Obtaining a portion of leonardite and crushing said portion of leonardite to form a portion of humic raw material; mixing one or more portion of animal manure with one or more portion of stover with one or more portion of organic waste to form a portion of compositing mix and composting said compositing mix to form a portion of composted material; obtaining a portion of plant waste and subjecting said portion of plant waste through an anaerobic combustion to form a portion of bio char; mixing said portion of bio char with said portion of composted material with said portion of humic material to form a portion of humic processed material; adding a portion of artificial taggant to said humic processed material to form tagged humic material; mixing said tagged humic material with said portion of biostimulant material to form a portion of biostimulant humic material; adding a taggant to said portion of biostimulant humic material to form a portion of tagged biostimulant humic material; mixing one or more portion of phosphorus with a portion of potassium and a portion of nitrogen and a portion of trace minerals to form portion of raw fertilizer; mixing said portion of raw fertilizer with said portion of tagged biostimulant humic material to form a portion of tagged fertilized biostimulant humic material.

The invention discloses a method for preparing a complex microbial inoculant for degrading enteromorpha polysaccharide and optimizing culture conditions of the complex microbial inoculant, the complex microbial inoculant for degrading enteromorpha polysaccharide is prepared through antagonism detection and strain combination screening, and the complex microbial inoculant for degrading enteromorpha polysaccharide is obtained through methods such as a single factor test, a pramipt-Berman test, a steepest climbing test and response surface analysis. According to the method, the enteromorpha polysaccharide degradation strain is used as a raw material to prepare the complex microbial inoculant, and compared with a single strain, the complex microbial inoculant can combine the functions of various strains in one preparation, so that the specificity of a degradation product can be improved; the complex microbial inoculant does not generate harmful by-products in the degradation process, the pollution of degradation products to the environment is reduced, theoretical support and practical basis are provided for enteromorpha degradation and research and development of biological fertilizers, and a new thought is provided for degradation and efficient utilization of enteromorpha resources.

A lipopeptide amino acid water-soluble fertilizer and a preparation method thereof of the present invention belong to fertilizers. The lipopeptide amino acid water-soluble fertilizer is made of 5 to 12 parts of lipopeptide surfactant stock solution, 10 to 20 parts of chelated medium and trace element mother solution, 15 to 20 parts of composite amino acid solution, 5 to 10 parts of urea solution, 0.1 to 0.5 parts of pollen polysaccharide, and 37.5 to 64.9 parts of water, by weight. The preparation method is to dissolve a total of 15 parts of composite amino acids in 40 parts of water to obtain a composite amino acid solution, dissolve 10 parts of urea in 20 parts of water to obtain a urea solution, and then add lipopeptide surfactant stock solution and pollen polysaccharide after mixing the composite amino acid solution, medium and trace element mother solution, and urea solution, and then add water to make up the volume after mixing evenly, and filter to remove non-water-soluble impurities after stirring until dissolved, so as to obtain lipopeptide amino acid water-soluble fertilizer. The lipopeptide surfactant stock solution added in the present invention can improve the fertilizer absorption efficiency, and the surfactant can be directly absorbed and utilized by plants as nutrients; pollen polysaccharide can improve fertilizer efficiency, so as to achieve the purpose of saving fertilizer and increasing efficiency.

The invention relates to the technical field of compound fertilizers, in particular to a selenium-rich water-soluble compound fertilizer. The selenium-rich water-soluble compound fertilizer comprises the following components in parts by weight: 10-15 parts of selenium sustained-release microspheres, 8-12 parts of a natural compound extract, 1-2 parts of potassium chloride, 1-3 parts of monoammonium phosphate, 0.1-0.2 part of EDTA chelated zinc, 0.05-0.08 part of borax and 300-500 parts of deionized water, and the selenium-rich water-soluble compound fertilizer prepared by the invention can slowly release selenium elements and effectively improve the selenium content of plants.

The invention relates to a plant nutrient solution capable of efficiently promoting growth. The plant nutrient solution capable of efficiently promoting growth is prepared from the following components in parts by mass: 10 to 20 parts of modified diatomite, 5 to 10 parts of nutrient substances, 0.5 to 3 parts of auxin, 1 to 3 parts of organic acid, 1 to 5 parts of auxiliaries and 50 to 100 parts of water, wherein the modified diatomite is sodium alginate and humic acid modified diatomite. The nutrient solution is obtained by compounding the modified diatomite, the nutrient substances, the auxin, the organic acid and the like, can improve the soil structure, regulate the plant growth and promote the yield and income increase of crops, is higher in stability, solves the problems in the prior art, and has a good application prospect.

The present invention relates to the cultivation (preferably indoor) of Hydrangea species for increased production of phyllodulcin and the provision of a plant material, preferably a dried plant material, having an increased content of phyllodulcin.

The invention provides a treatment method for promoting germination of Cinnamomum tamala seeds, and relates to the technical field of artificial breeding of Cinnamomum tamala. The treatment method mainly comprises the following steps: carrying out ice-water ultrasonic treatment on fresh Cinnamomum camphora fruits, removing fake peels to obtain seeds, carrying out shock cooling variable-temperature pretreatment on the seeds, preparing a nutrient solution from gibberellin, tocopheryl acetate, N-acetylglucosamine, compound vitamins and compound amino acids, wetting paper by using the nutrient solution, wrapping the seeds, carrying out sowing management and the like. According to the method, the defects in the prior art are overcome, the germination rate of fresh camellia oleifera seed sowing is effectively increased, growth of early germination seedlings of camellia oleifera is promoted, and a good guiding effect is provided for artificial breeding and planting of camellia oleifera.

The invention relates to the technical field of fertilizers, in particular to an environment-friendly water-soluble fertilizer containing a seaweed extract and polyglutamic acid. The water-soluble fertilizer is prepared by preparing seaweed oligosaccharide and double-grafted poly-L-gamma-sodium glutamate and compounding and complexing the seaweed oligosaccharide and the double-grafted poly-L-gamma-sodium glutamate, has the characteristics of low salting-out, high stability, no precipitation, good slow release performance and the like, and can continuously release nutrients and keep a solution clear and transparent under a low-salt condition; and because the polyglutamic acid and seaweed extract compound drip irrigation agent has the chelation and water retention characteristics of the polyglutamic acid and the natural growth promoting effect of the seaweed extract, the crop rhizosphere nutrient absorption efficiency and stress resistance are remarkably improved, the compound drip irrigation agent is suitable for drip irrigation and water and fertilizer integrated application of greenhouse vegetables, fruit trees and field crops, and the comprehensive effects of high efficiency, low salt load and environment friendliness are achieved.

The invention discloses a method for preparing a liquid fertilizer and co-producing a medium element fertilizer by using raffinate acid, and relates to the technical field of preparation of fertilizers by using raffinate acid. Comprising the following steps: S1, carrying out filter pressing on raffinate acid: adding a modified filter aid into the raffinate acid, uniformly mixing, pumping into a plate-and-frame filter press, and carrying out filter pressing to obtain a raffinate acid clear liquid and filter residues; s2, preparing a liquid fertilizer from the raffinate acid clear liquid: sequentially adding desalted water, nutrient elements, synergistic factors and the raffinate acid clear liquid into a reaction kettle, and completely dissolving to obtain an acidic liquid fertilizer; s3, preparing the medium element fertilizer from the filter residues: uniformly stirring and mixing the filter residues, phosphate tailings and a modified synergistic granulating agent, granulating, drying, screening and cooling to obtain the medium element fertilizer. The technological process is simple and easy to operate, raffinate acid is only subjected to filter pressing, the treatment cost is low, the fertilizer efficiency is improved through synergistic factors in the acid liquid fertilizer, the particle strength is improved after filter residues are granulated through the modified synergistic granulating agent, and meanwhile the medium element fertilizer is endowed with the biological stimulation effect.

The invention discloses a monodisperse nano calcium carbonate based foliar calcium fertilizer, which is mainly prepared from the following raw materials: 1 to 20 parts of monodisperse nano calcium carbonate filter cake, 0.05 to 0.9 part of ethyoxyl modified polytrisiloxane, 0.01 to 0.8 part of modified casein, 0.01 to 0.8 part of enzyme, 0.05 to 0.9 part of sugar alcohol and 10 to 180 parts of water. The raw materials are mixed in two steps according to a certain sequence, stirred and dispersed to obtain the novel monodisperse nano calcium carbonate based foliar calcium fertilizer, and the novel monodisperse nano calcium carbonate based foliar calcium fertilizer is diluted with water until the solid content of calcium carbonate is 0.5%-2% and then used for foliar calcium supplement of various crops and fruit and vegetable crops. The novel foliar calcium fertilizer is safe and non-toxic, can be directly sprayed to the foliar surfaces and fruit surfaces of crops, fruits and vegetables, is used for planting grain crops such as rice, wheat and sorghum and non-grain crops such as cassava, sugarcane, fruits and vegetables, effectively guarantees calcium absorption and utilization of the crops, and achieves the effect of increasing both production and income; the yield of fruits and vegetables can be increased to a certain extent, and certain insect-repelling and disease-preventing effects are achieved.