85results about How to "High chelation rate" patented technology

The invention discloses a compound water soluble fertilizer used for citrus crops, a preparation method and an application method. The compound water soluble fertilizer used for citrus crops is mainly used in plant nutrition field, and comprises the following components: an amino acid raw material, macroelements P and K, secondary elements Mg and Ca, trace elements Fe, Mn, Zn, B, Mo and Cu, a beneficial element Si, an auxiliary agent, a PH conditioning agent and an aqueous solution. The preparation method is characterized in that composite amino acid chelates Mn, Fe, Cu, Mg, Ca and Zn at normal temperature of 15-35 DEG C and prepares the water soluble fertilizer with six metallic elements, the reasonable fertilizing can be carried out at different growth period of the crops, the balance supplement of a plurality of nutrient elements required by citrus crops can be realized, and the output and quality of the citrus crops can be increased.

The invention discloses a chitosan-fulvic acid compound fertilizer and a preparation method thereof. The compound fertilizer comprises chitosan, fulvic acid, nitric phosphate, urea, urea formaldehyde, diammonium phosphate, potassium sulphate, medium and trace elements and rare earth elements. In the preparation method, the medium and trace elements are chelated by taking chitosan and fulvic acid as chelating agents, and a chelated liquid is taken as a bonding agent for producing and granulating simultaneously. The invention has the advantages that: the chitosan-fulvic acid compound fertilizeris only applied once without additional application in the entire growing period of crops, so that the cost can be lowered, the labor productivity is lowered, the problems of slow fertilizing at an early stage and insufficient fertilizing at a later stage existing in an ordinary fertilizer are solved, mutual help is given in an emergency, and the utilization ratio of the fertilizer is increased; the medium and trace elements are chelated by using the chitosan and the fulvic acid respectively, so that the chelating efficiency of the medium and trace elements is increased, and the absorption and utilization ratio of crops on the medium and trace elements is increased; and the chelated liquid is taken as a granulating bonding agent, so that the granulating rate is high, the production efficiency is high, other bonding agents do not need to be added, and the cost is saved.

The invention provides a preparation method of lignin metal chelate fertilizer, sequentially comprising the following steps of: (1) preparing industrial lignin salts into an aqueous solution of a certain concentration in a dissolving tank; (2) transferring the prepared aqueous solution of industrial lignin to a reaction vessel and regulating a pH value of the solution by using a pH regulator; (3) adding an oxidant and an initiator, starting a stirring device of the reaction vessel, sufficiently and uniformly mixing and then adding inorganic salts containing micro metal elements; and (4) heating to a certain temperature and reacting for specified time. The invention also provides a device for carrying out the method. The modified lignin salt-medium micro metal element chelate fertilizer which is prepared by using the method and the device has the advantages of low cost and strong chelating capability, and can be compounded with various fertilizers and improve the content of micro elements in the fertilizer.

Production of L-aspartyl-calcium is carried out by taking L-asparagic acid and calcium hydroxide as raw materials, furnishing in proportion 3.4-3.8:1, putting it into mixer, adding into water while agitating to obtain soliquoid, heating the soliquoid, inducing into colloid mill and high-pressure fluid nanometer mill to obtain L-aspartyl-calcium liquid, inducing L-aspartyl-calcium into agitating container, adding into 45% alcohol, agitating, laying aside to obtain L-aspartyl-calcium crystal, adding into 55% alcohol, agitating, laying aside, centrifugal separation depositing, vacuum drying deposit and screening to obtain final product. It has short reactive time, higher purity and more yields.

The invention discloses a preparation method and application of a small peptide chelated zinc compound. The preparation method comprises the following steps: preparing a nutrient solution from a protein raw material, a carbon source and water and carrying out sterilization; inoculating bacillus and protease into the sterilized nutrient solution and then carrying out fermentation enzymolysis or enzymolysis fermentation so as to obtain small peptide fermentation liquor; continuing to add a water-soluble zinc salt and carrying out a chelation reaction under the conditions of a reaction temperature of 55 to 65 DEG C and a pH value of 5 to 6; and drying a reactant so as to obtain the small peptide chelated zinc compound. According to the invention, the preparation method for the small peptide chelated zinc compound has a high chelation rate, as high as more than 94%; the prepared small peptide chelated zinc compound has good stability in the stomach of an animal, contains a plurality of bioactive components and has more comprehensive nutrients, so the small peptide chelated zinc compound can be used as a feed additive to supplement trace elements for daily ration and improve immune functions of animals.

The invention relates to resource utilization of chrome leather solid wastes, in particular to a method for preparing an amino acid chelated fertilizer by using chrome leather solid wastes. According to the invention, the method comprises the following steps of: using the chrome leather wastes as raw materials, dechroming and hydrolyzing the chrome leather wastes so as to generate an amino acid, and then chelating trace elements so as to prepare the amino acid chelated fertilizer. The method for preparing the amino acid chelated fertilizer by using the chrome leather solid wastes, provided by the invention, has the advantages of simple process and easiness in operation; collagens in the chrome leather solid wastes are completely hydrolyzed to be chelated with the trace elements so as to prepare the chelated fertilizer; the chrome content of the chelated fertilizer is less than national standard; and the chelating rate of the collagens and the trace elements is more than 95%. The chelated fertilizer prepared by using the method provided by the invention can be used for leaf surface spraying, seed soaking and root pouring and has an obvious effect on yield increase of crops.

The invention discloses a preparation process for a zinc fish-skin collagen polypeptide chelate to overcome the problems of difficultly controllable chelating process, a low chelating rate, low chelate yield and long chelating time in conventional preparation processes for the zinc fish-skin collagen polypeptide chelate. The process provided by the invention optimizes chelation reaction conditions, adds a NaHCO3 solution in chelating process at the same time so as to maintain stability of the pH value of a reaction system, cooperatively uses ultrasonic treatment to improve chelating efficiency and chelate yield and introduces air in chelating process air to maintain stability of chelation reaction temperature. The preparation process in the invention has the advantages of simple steps, capacity of effectively controlling the chelating process and allowing the chelating process to be more stable, short chelating time, a high chelating rate and high chelate yield.

The invention discloses a defatted soybean protein small peptide zinc chelate and a preparation method thereof. Most small peptides of the chelated zinc are dipeptides and tripeptides; the content ofthe small peptides with the molecular weight of 440 Da or below is 80 percent; the molecular weight of 100 percent of the small peptides is 1,000 Da or below; and the chelation rate of zinc is 98 percent or above. The preparation method comprises enzymolysis, chelation and drying. The preparation process disclosed by the invention is simple; the raw materials are low in cost and easy to obtain; the drying is performed by adopting a spray drying method, so that the production period is greatly shortened, and the time cost and the production cost are reduced; and the defatted soybean protein small peptide zinc chelate is suitable for large-scale production. Protein small peptides prepared by the preparation method are enzymolyzed by adopting compound protease, so that the enzymolysis is thorough; and the chelation rate of the prepared small peptide zinc chelate is more than or equal to 98 percent. When the defatted soybean protein small peptide zinc chelate prepared by the preparation method disclosed by the invention is used in an animal feed additive, the effect is obviously better than the effects of zinc sulfate and amino acid zinc chelate; and the defatted soybean protein smallpeptide zinc chelate is high in stability, high in absorption rate and high in utilization rate, and reduces pollution caused by animal metabolism to the environment.

The invention provides a chelated calcium fertilizer prepared by utilizing shells as well as a preparation method and an application thereof. The chelated calcium fertilizer is mainly prepared from 1.3-2.2 parts by weight of shell powder, 1 part by weight of glacial acetic acid and 0.19-0.66 part by weight of sugar alcohol through the steps of pretreatment, acidolysis, chelating and fine filtering, wherein the sugar alcohol is composed of 1 part by weight of propanetriol, 4 parts by weight of glucose and 9 parts by weight of sorbitol. According to the chelated calcium fertilizer prepared by utilizing shells as well as the preparation method and application thereof, the calcium resource of the shells is fully utilized, and the environment-friendly effect is facilitated; the product has the advantages of being free of heavy metals, high in calcium content, rich in nutrients, easy to absorb and the like, can be used for crops, traditional Chinese medicine materials, and fruit trees for a long term, and does not generate any adverse effects on plants and human bodies.

The invention discloses a preparation method and application of a small peptide chelated manganese compound. The preparation method comprises the following steps: inoculating bacillus into a nutrient solution, carrying out shake cultivation at a temperature of 30 to 37 DEG C for 18 to 30 h, adding protease and continuing cultivation for 6 to 12 h so as to obtain small peptide fermentation liquor, or adding protease into the nutrient solution, carrying out enzymatic hydrolysis for 6 to 12 h, inoculating bacillus and then carrying out shake cultivation at a temperature of 30 to 37 DEG C for 18 to 30 h so as to obtain the small peptide fermentation liquor; continuing to add a water-soluble manganese salt and carrying out a chelation reaction under the conditions of a temperature of 55 to 65 DEG C and a pH value of 5 to 6; and drying a reactant so as to obtain the small peptide chelated manganese compound. According to the invention, the preparation method for the small peptide chelated manganese compound has a high chelation rate, as high as more than 95%; the prepared small peptide chelated manganese compound has good stability in the stomach of an animal, contains a plurality of bioactive components and has more comprehensive nutrients, so the small peptide chelated manganese compound can be used as a feed additive to supplement trace elements for daily ration and improve immune functions of animals.

The invention discloses a preparation method and application of a small peptide chelated iron compound. The preparation method comprises the following steps: preparing a nutrient solution from a protein raw material, a carbon source and water and carrying out sterilization; inoculating bacillus and protease into the nutrient solution and then carrying out fermentation enzymolysis or enzymolysis fermentation so as to obtain small peptide fermentation liquor; continuing to add a water-soluble ferric salt and carrying out a chelation reaction under the conditions of a reaction temperature of 55 to 65 DEG C and a pH value of 5 to 6; and drying a reactant so as to obtain the small peptide chelated iron compound. According to the invention, the preparation method for the small peptide chelated iron compound has a high chelation rate, as high as more than 95%; the prepared small peptide chelated iron compound has good stability in the stomach of an animal, contains a plurality of bioactive components and has more comprehensive nutrients, so the small peptide chelated iron compound can be used as a feed additive to supplement trace elements for daily ration and improve immune functions of animals.

The invention belongs to the technical field of animal feed and in particular discloses a preparation method of a composite premix feed and the obtained composite premix feed. The preparation method comprises the following steps: evenly mixing humic acid, one or more of divalent metal salts of iron, zinc, copper and manganese and water, then using the obtained mixture to performing a chelation reaction and obtain the composite premix feed. The preparation method does not use any organic microelement chelate and uses the humic acid and the divalent metal salt as raw material to prepare the composite premix feed, the operation is easy, the cost is low; the nutritional components of the prepared composite premix feed are unopposed, does not damage vitamins, has good stability, and can increase the growing and reproduction performances of animals, improve the quality of meat and eggs of animals and reduce the adverse effect of animal production to the environment.

The invention relates to a preparation method of an alanine metal chelate. The preparation method comprises the following steps: adding a metal salt solution into an alanine solution, carrying out a chelation reaction under acidic conditions, and concentrating, precipitating, separating and drying the obtained reaction solution to obtain the alanine metal chelate. The method is high in chelating rate, simple and convenient to operate, capable of remarkably shortening production period and remarkably reducing the production cost, and suitable for large-scale industrial production.

The invention provides an oyster activated peptide-zinc chelate and a preparation method and application thereof. The preparation method for the oyster activated peptide-zinc chelate comprises the following steps: preparing a peptide solution from oyster activated peptide, and then performing chelating reaction on the peptide solution and a zinc source to prepare chelated reaction liquid; performing sedimentation on the chelated reaction liquid by an organic solvent to prepare the oyster activated peptide-zinc chelate. Particularly, the mass percentage of components with the molecular weight smaller than 1,000 Da in the oyster activated peptide is over 90 percent. The contents of proteins and peptides in the oyster activated peptide are high, and the molecular weight of the peptides is relatively lower; the oyster activated peptide is low in sensitization, low in bitterness score and good in taste; when the oyster activated peptide is chelated with zinc, the chelating rate is high; the prepared oyster activated peptide-zinc chelate is easy to absorb and use; zinc supplementation can be realized, and various physiological efficacies of the oyster activated peptide can be comprehensively enhanced; the oyster activated peptide-zinc chelate has a good application prospect.

The invention discloses a preparation method for a whitmania pigra Whitman polypeptide zinc chelate possessing antibacterial activity. The method comprises the following main steps: (1) degreasing whitmania pigra Whitman tissue; (2) performing enzymolysis on whitmania pigra Whitman protein; (3) separating whitmania pigra Whitman polypeptide; (4) performing chelation reaction on whitmania pigra Whitman polypeptide subjected to enzymolysis and zinc sulfate heptahydrate; and (5) performing alcohol precipitation separating and washing on the chelation reaction product. The prepared whitmania pigra Whitman polypeptide zinc chelate possesses relatively high yield and chelation rate, and oxford-cup-method bacteriostasis detection test proves that the whitmania pigra Whitman polypeptide zinc chelate possesses obvious antibiosis biological activity on escherichia coli and bacillus subtilis, and possesses great application prospect in the field of food and medicines.

The invention relates to a preparation method of amino acid chelated calcium. The preparation method comprises the following steps: preparing a mixture by mixing a calcium-containing compound and an amino acid ligand according to a specific ratio, adding a right amount of water into the mixture, performing primary filtration on the material to obtain a first suspension having a solid particle size less than 20 mu m, regulating the pH value, performing homogenization treatment to enable the solid particle size to reach the nano level, performing secondary filtration after the homogenization treatment filtration a second suspension having a solid particle size less than 100 nm, and finally performing chelation reaction on the second suspension at specific temperature and pressure. Thus, the chelation rate and the reaction efficiency of the chelation reaction are greatly improved, the reaction time is short, and the reaction is complete. The amino acid chelated calcium is high in yield; the mass percent of the calcium element in the amino acid chelated calcium is up to 12.9%; and the amino acid chelated calcium prepared by the method can be absorbed by a human body very easily, and the absorptivity is up to 95% or above.

The invention discloses a preparation method of inonotus obliquus polysaccharide chelated zinc, which comprises the following steps:1) selecting inonotus obliquus by a pulverizer; 2) weighing the polysaccharide, and extracting in a water bath; 3) cooling and centrifuging; 4) taking supernatant, concentrating, and degreasing; 5) removing protein, removing organic solvent, and adding absolute ethylalcohol; 6) precipitating with alcohol, centrifuging, and freeze-drying to obtain inonotus obliquus polysaccharide; 7) weighing the inonotus obliquus polysaccharide and zinc sulfate heptahydrate in acontainer, wherein the mass ratio of the inonotus obliquus polysaccharide to zinc ions is 4-6:1, the initial concentration of the zinc ions is 4-6; magnetic stirring at room temperature for 6-10h at the stirring speed of 120-180r / min; 8) adding anhydrous ethanol, carrying out alcohol precipitation and centrifugation, taking a precipitate, and lyophilizing to obtain the inonotus obliquus polysaccharide chelated zinc; the chelation rate of the method is high, and the oxidation resistance of the obtained Zn-IOP chelate is remarkably increased.

The invention provides a new simpler method for synthesizing copper glycinate, which comprises the following steps: stirring to chelate cupric subcarbonate powder and glycine solution in a mol ratio of 1:4.5 in a water bath at 65-70 DEG C for 30 minutes, adding ethanol, cooling to crystallize, and centrifuging to obtain the copper glycinate solid.

The invention discloses a microelement chelating fertilizer and a preparation method thereof. The microelement chelating fertilizer is prepared from the following raw materials in parts by weight: 40 to 50 parts of amino acid, 5 to 10 parts of soluble magnesium salt, 3 to 6 parts of soluble ferric salt, 5 to 8 parts of soluble zinc salt, 10 to 15 parts of soluble calcium salt, 3 to 6 parts of soluble manganese salt, 5 to 8 parts of carboxymethylcellulose, 5 to 12 parts of urea, 4 to 7 parts of pectin, and 1 to 2 parts of citric acid. Through selecting the carboxymethylcellulose, the pectin, the urea and the citric acid with specific matching ratio for cooperative use, the stability and the chelating rate of the microelement chelating fertilizer are improved, meanwhile, a slow-release property is realized, the persistence of the fertilizer is improved, and the crop yield is increased. Therefore, the microelement chelating fertilizer can be widely applied in crop production.

The invention provides full-nutrition brown alga fermentation liquid-based biological organic liquid-state fertilizer, which is characterized in that firstly, complex enzyme is used for performing enzymolysis on brown algae to obtain brown algae enzymolysis liquid; then, the brown algae enzymolysis liquid is subjected to biological fermentation; after brown algae fermentation liquid is obtained, glycine is used as a chelating agent to prepare iron, calcium and copper chelates; finally, the brown algae fermentation liquid is used as base liquid; nitrogen phosphorus and potassium, iron, calciumand copper chelates and other auxiliary agents required by crops are added; mixing and uniform stirring are performed; the full-nutrition brown alga fermentation liquid-based biological organic liquid-state fertilizer is obtained. The biological organic liquid-state fertilizer uses the brown algae fermentation liquid as the base liquid, and contains rich microbial bacterial agents and mycoprotein;the nutrition is comprehensive; the crop absorption is easy; the effects of promoting crop growth and development, increasing the production and the yield, improving the quality, effectively improving the crop root system microbial population, and favorably improving the crop resistance are achieved.

The invention discloses a method for preparing Hypsizygus marmoreus polysaccharide chelated selenium. The method comprises the steps of adding sodium selenite into distilled water for complete dissolution, so as to prepare a sodium selenite solution having an initial mass concentration of 6-7 mg / mL, adding Hypsizygus marmoreus polysaccharide according to a mass ratio of the Hypsizygus marmoreus polysaccharide to sodium selenite being (5.5-6):1, adjusting the pH to 4.5-6, conducting chelation for 5.5-7 hours at room temperature, and then adding absolute ethanol solution with an amount being 3 times of volume of the chelation system, conducting standing still for precipitation, then conducting centrifugation to take a precipitate, and finally conducting drying to obtain the Hypsizygus marmoreus polysaccharide chelated selenium. The chelation rate of the method of the invention is high (up to 10.07%); and compared with Hypsizygus marmoreus polysaccharide, rhe ability of the Hypsizygus marmoreus polysaccharide chelated selenium to scavenge DPPH free radicals and hydroxyl radicals is enhanced.

The invention relates to a preparation method based on wood frog bone and flesh collagen polypeptide chelated calcium. Wood frog bone and flesh chelated calcium is researched by the aid of a lot of wood frog bone and flesh, bones are reasonably treated, waste of resources is avoided, environmental pressure is reduced, and economic and ecological benefits are improved. The method includes the steps: wood frog bone and flesh powder roughcasting; wood frog bone and flesh powder enzymolysis; enzymolysis liquid ultra-filtration; chelating of enzymolysis liquid and calcium chloride. The preparationmethod has the advantages that polypeptide is prepared by a method of trypsin enzymolysis, small molecular weight polypeptide is prepared by a nano-filtration method, and the collagen polypeptide liquid with small molecular weight is acquired. The collagen polypeptide liquid and calcium ions are chelated by the method to obtain the polypeptide chelated calcium, absorption rate in human bodies is increased, calcium supplement effects are good, the method is simple to operate, chelating can be achieved without freeze-drying preparation powder, the method is high in efficiency, easy to control, and prepared collagen polypeptide chelated calcium is high in chelation rate. The prepared wood frog bone and flesh collagen polypeptide chelated calcium can be used for development of common foods andhealth care products or used for the field of medicines.

The invention provides a chelated calcium fertilizer prepared from oyster shell, and a preparation method and application thereof. The chelated calcium fertilizer is mainly prepared by carrying out pretreatment, acid hydrolysis, chelation, refined filtration and the like on the following components in parts by weight: 1.5-2 parts of oyster shell powder, 2.7-5 parts of concentrated hydrochloric acid and 0.2-0.6 part of sugar alcohol. The mass percent of the concentrated hydrochloric acid is 20-37%. The weight ratio of the solute in the concentrated hydrochloric acid to the oyster shell powder is 1:(1.5-2). The sugar alcohol is composed of the following components in parts by weight: 1 part of glycerol, 4 parts of glucose and 9 parts of sorbitol. The chelated calcium fertilizer can fully utilize the calcium agent resource of the oyster shell, is beneficial to environment friendliness, has the advantages of no heavy metal, high calcium content, rich nutrients and the like, can be easily absorbed, can be used on crops, traditional Chinese medicinal materials and fruit trees for a long time, and can not generate any adverse effect on the plant and human body.

The invention relates to the technical field of deep processing of ginseng, and in particular discloses a preparation method of ginseng chelating peptide. The preparation method at least comprises thefollowing steps: a. slicing ginseng, adding water and boiling, cooling to 55-58 DEG C, then adding amylase and saccharifying enzyme for carrying out desaccharification and enzymatic hydrolysis; b. adding bacillus subtilis neutral protease and bromelain into enzymatic hydrolysate for carrying out enzymolysis; after the enzymolysis is finished, carrying out enzyme deactivation to obtain hydrolysate, wherein the enzymatic hydrolysis conditions are as follows: the enzymatic hydrolysis temperature is 55-58 DEG C, and the enzymatic hydrolysis time is 3-4h; c. separating and purifying the hydrolyzate, then adding soybean peptide, and carrying out chelation at 45-50 DEG C to obtain a chelating solution; d. concentrating and drying the chelating solution to obtain the ginseng chelating peptide. The extraction rate of the ginseng chelating peptide prepared by the method is high; the obtained ginseng chelating peptide is small in molecular weight, narrow in distribution and high in chelating yield with trace elements, vitamins and polysaccharides.

The invention relates to a method for preparing a crop nutrient solution from low molecular weight chitosan oligosaccharide chelate ferrous ions and zinc ions. The method comprises the following steps: dissolving chitosan in an acid solution, adding a small amount of rhamnose and ammonium sulfate, performing anaerobic fermentation for 7-10 days, adding acid into supernate to adjust the pH value to 1-4, adding a ferrite solution, heating to 55-70 DEG C, keeping the temperature for 2 hours, adding a proper amount of calcium carbonate to adjust the pH value to 4-6, adding a zinc solution, heating to 65-75 DEG C, keeping the temperature for 1 hour, leaving to sand to layer the solution, and repeatedly filtering the supernate, thereby obtaining the crop nutrient solution. By adopting the crop nutrient solution, elements of iron and zinc essential for crops can be effectively supplemented, little leaves and chlorotic disorder can be prevented and relieved, the content of heavy metals in fruits and vegetables can be reduced, the quality can be improved, and the yield can be increased.

The present invention discloses a preparation method of an amino acid chelate. Soybean proteins are hydrolyzed, amino acids are extracted as a chelating ligand, and the mixed amino acid and metal ionminerals subjected to a chelating reaction in conditions of a stabilizer, and an appropriate pH value, temperature and solution isoelectric point to prepare the chelate. The preparation method is simple and good in chelation property. The prepared amino acid chelate is high in chelation rate, has better physiological activity than a compound formed by chelation of a traditional single amino acid,and can promote absorption and utilization of mineral metal ions by living organisms.

A compound amino acid chelated liquid fertilizer based on earthworm enzymolysis is characterized by comprising the steps: firstly, cleaning earthworms, defecating, spitting mud and freeze-drying to obtain dry earthworms; then carrying out Soxhlet extraction, deestering and deodorization of the dried earthworms with anhydrous ethanol and acetone, crushing and grinding to prepare a slurry, and carrying out enzymolysis to obtain an earthworm amino acid solution; and finally, taking the earthworm amino acid solution as a chelating agent, chelating with iron, zinc, manganese and copper trace elements, and supplementing macroelements needed by crops, to obtain the compound amino acid chelated liquid fertilizer based on earthworm enzymolysis. The earthworm enzymolysis solution is added in the liquid fertilizer, and the liquid fertilizer is rich in a variety of amino acids, is a natural chelating agent, has the advantages of high chelation rate and stable chelate compound, is easily absorbed by the crops, promotes crop growth and development, increases both production and income, and improves the quality.

The invention discloses a preparation method of a cod steak protein peptide ferrous chelate. The preparation method comprises the following steps: (1) enzymatic hydrolysis: cleaning a cod steak, removing residual internal organs and fish skins, boiling the cod steak at a high temperature of 121 DEG C under a high pressure for 30 minutes, homogenizing the cod steak, adding water into solids obtained by homogenizing to form uniform cod slurry, adjusting the pH of the uniform cod slurry to a proper value, adding protease, carrying out sufficient enzymatic hydrolysis, and stopping enzymatic hydrolysis to obtain a cod steak protein peptide solution; (2) chelating: adjusting the pH of the cod steak protein peptide solution, and adding a ferrous salt solution to carry out chelating reactions; and(3) drying: centrifuging the product obtained in the step (2), saving the supernate, and drying the supernate to obtain a finished product. The purity of prepared cod steak protein peptide ferrous chelate is high, the chelating rate between the cod steak protein peptide ferrous chelate and ferrous ions is high, the stability is good, the cod steak protein peptide ferrous chelate can improve the anemia state of newly weaned newborn mice; moreover, the preparation method and technology are simple, the raw materials are easily available, the cost is low, and the preparation method is suitable for industrial production.

The invention discloses a multi-element chelated fertilizer and a preparation method thereof. The multi-element chelated fertilizer is prepared from the following raw materials in parts by weight: 40-50 parts of amino acid, 5-10 parts of soluble magnesium salt, 3-6 parts of soluble ferric salt, 5-8 parts of soluble zinc salt, 10-15 parts of soluble calcium salt, 3-6 parts of soluble manganese salt, 5-8 parts of carboxymethylcellulose, 5-12 parts of urea and 4-7 parts of pectin. By matching carboxymethylcellulose, pectin and urea in a special proportion in use, the stability and chelating rate of the multi-element chelated fertilizer are improved, and meanwhile, the fertilizer also has slow release property, the durability of fertilizer efficiency is improved and the output of crops is increased. Therefore, the fertilizer can be widely applied to crop production.

The invention discloses a preparation method of small fish protein peptide chelated zinc. The preparation method comprises the following steps: dissolution of small fish protein peptide, ultrasonic chelation, concentration and spray drying. With the adoption of the process, the problems that the chelating process is not easy to control, the chelating time is long and the chelating rate is low during preparation of chelated zinc with an existing process are solved. The process of a chelating reaction is optimized, and the chelating rate is increased through ultrasonic treatment; the preparation method adopts a simple preparation process step, can effectively control the chelating process and is short in chelating time and easy to operate.