Amino acid organic fertilizer and preparation method thereof

Abstract

The invention discloses an amino acid organic fertilizer and a preparation method thereof. The method adopts compounded fungi and fermentation aids to reduce the peculiar smell and fatty acid content of fish viscera after fermentation; a specially prepared viscous additive is used to prevent the fertilizer from being washed away by rainwater and reducing the fertilizer efficiency, and the amino acids in the fertilizer from being oxidized by light; and a chelating synergistic coating agent containing trace elements and having a slow-release function is used to coat the organic fertilizer particles. The amino acid organic fertilizer prepared by the invention has the characteristics of short fermentation time, low fatty acid content, easy absorption by crops, long-lasting fertilizer efficiency, and comprehensive nutrition.

Description

Technical Field

[0001] The invention relates to the technical field of organic fertilizers, and in particular to an amino acid organic fertilizer and a preparation method thereof. Background Art

[0002] Amino acid fertilizer is a new type of organic fertilizer that uses animal-derived amino acids or plant-derived amino acids as a matrix, and utilizes its high affinity with plants and its promotion of plant growth and development to increase crop yield and quality. This fertilizer can not only maintain the slow release and full utilization of macroelements, but also ensure the stability and long-term effectiveness of trace elements. It has a good effect of enhancing plant respiration, improving plant oxidation-reduction processes, and promoting plant metabolism. It can promote photosynthesis and the formation of chlorophyll, and has a significant promoting and activating effect on physiological and biochemical processes such as oxide activity, enzyme activity, seed germination, nutrient absorption, and root growth and development. In particular, its affinity with plants is unmatched by any other substance.

[0003] Thousands of years ago, the Chinese had already used amino acid fertilizers. The Tang Dynasty's "Tree Planting Book" records that "to plant sugarcane, pig hair and soil are necessary", which means that good sugarcane can be grown by mixing pig hair with soil. The main component of pig hair is protein, which becomes polypeptide or amino acid after degradation in the soil. In the Ming Dynasty, Xu Guangqi's "Northern Farming Record" recorded that "dung pills" were prepared from animal viscera and corpses, and the main component of animal viscera and corpses after degradation was amino acids. In ancient times, "dan" referred to essence, which was something with strong efficacy, which shows its obvious fertilizer effect. However, animal-derived amino acids are prone to corruption and produce odor during the fermentation stage of raw materials. Even if fermentation is successful, the fatty acid content may be too high, and plants cannot absorb fatty acids. Conventional methods take too long to completely degrade them and cannot be implemented. In addition, after the application of amino acid organic fertilizers, the amino acids in them are easily washed away by rain or damaged by light before being absorbed by crops, which causes great waste. Amino acid organic fertilizer is rich in various nutrients, but it is still lacking in trace elements. Moreover, trace elements are easily fixed by the soil or form insoluble substances with other components and cannot be absorbed by crops. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an amino acid organic fertilizer with short fermentation time, low fatty acid content, not easy to be oxidized, not easy to reduce fertilizer efficiency due to rain erosion, containing trace elements and long fertilizer effect time.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention comprises the following steps:

[0006] A method for preparing an amino acid organic fertilizer is:

[0007] 1) Pre-fermentation:

[0008] Add 40-50 parts of fish viscera, 20-30 parts of Chinese medicine residue, 10-20 parts of orange peel, 0.5-0.7 parts of fermentation aid, and 1-2 parts of activated bacterial solution into a fermentation container, stir evenly, cover with plastic film and seal for fermentation, maintain the fermentation environment temperature between 28-32°C, measure the internal temperature of the fermentation every day, and obtain the fermentation product when the fermentation temperature is measured twice and is below 40°C;

[0009] 2) Mixed fermentation:

[0010] The fermented material was mixed with 50-60 parts of biogas residue and piled into a 50-60 cm high soil pile. The internal temperature of the fermentation pile was measured every day. When the temperature exceeded 60°C, an organic fertilizer turning machine was used to turn the pile once. When the fermentation temperature was measured twice and was below 35°C, the fermentation was completed. Then, the fermented material was crushed through a 60-mesh sieve to obtain the fermented material.

[0011] 3) Granulation and coating:

[0012] The fermented material and the viscous additive are mixed evenly in a ratio of 2:1 and then put into a low-temperature organic fertilizer granulator for granulation, and then coated with a layer of chelating synergistic coating agent through a fluidized bed to obtain an amino acid organic fertilizer.

[0013] Wherein, the preparation method of activated bacterial solution is:

[0014] Add 1 part of Aspergillus niger, 1 part of Lactobacillus casei, 1 part of Lactobacillus acidophilus, and 2 parts of Staphylococcus carnosus into 10 parts of 10% brown sugar water, stir evenly, and place in an environment at a temperature of 28-32°C for 12 hours to obtain an activated bacterial solution.

[0015] Wherein, the preparation method of the fermentation aid is:

[0016] Add 1-2 parts of ergosterol to 1.5 parts of 70% ethanol solution at 45-50°C, disperse at 400r / min for 10 minutes, then add 2-4 parts of disodium maleate to 2 parts of distilled water at 40-50°C and disperse at 200r / min for 10 minutes, then mix the above two solutions and disperse at a rate of 350r / min for 10 minutes to obtain a fermentation aid.

[0017] Wherein, the specific method of step 3) granulation coating is:

[0018] i. Mix the fermented material and the viscous additive in a ratio of 2:1 and transport them to a low-temperature organic fertilizer granulator. Use a mold with an aperture of 8-10mm and collect the organic fertilizer particles at the outlet;

[0019] ii. Put the above organic fertilizer particles into the material port of the fluidized bed, add a chelating synergistic coating agent with a mass volume ratio of 1:1 to the organic fertilizer particles, set the fluidized bed flow rate to 1-2m / s, the temperature to 40-50°C, turn on the blower and adjust the nozzle pressure to 1-1.2Mpa, and continue drying at the outlet for 5-10min to obtain an amino acid organic fertilizer.

[0020] Wherein, the preparation method of the viscosity additive is:

[0021] a. Rice straw pretreatment:

[0022] Cut the rice straw into sections, wash it with distilled water, and then steam it at 100°C for 1-2 hours. Take it out, dry it, and grind it through a 30-mesh sieve to obtain rice straw powder.

[0023] b. Alkali treatment:

[0024] The rice straw powder was immersed in a 30% NaOH solution, stirred at 70-75°C at a rate of 350 r / min for 2 h, and centrifuged and washed until neutral for later use;

[0025] c. Acid treatment:

[0026] The alkali-treated rice straw powder was immersed in a 30% sodium chlorite solution, the pH was adjusted to 3.5 using a 30% acetic acid solution, and the powder was placed in a constant temperature water bath at 50-60°C and stirred at a rate of 350 r / min for 2 h;

[0027] d. Washing:

[0028] The rice straw powder after acid treatment is washed with distilled water for 2-3 times and then dried at 80-90°C to obtain rice straw cellulose;

[0029] d. Mixing:

[0030] 10-15 parts of rice straw cellulose, 5-7 parts of tea residues and 1-2 parts of grape seeds are mixed evenly and then crushed through a 60-mesh sieve to obtain a viscous additive.

[0031] Wherein, the preparation method of the chelating synergistic coating agent is:

[0032] I. Weigh 10-12 parts of 1,4-dithioerythritol and add it to 10-15 parts of distilled water, then place it in a constant temperature water bath at 60-65°C, stir and dissolve it at a rate of 350r / min for 10-15min, add 6-8 parts of element additives, then increase the temperature to 80-85°C, adjust the stirring rate to 80r / min, and continue stirring for 20-25min to obtain a chelate solution;

[0033] II. Add 3-5 parts of N-ethylmaleimide to 5-7 parts of 70% ethanol solution, disperse at a high speed of 1200r / min for 5 minutes, then mix with the above chelate solution, and continue to disperse at a high speed of 3000r / min for 10 minutes to obtain a chelating synergistic coating agent.

[0034] Among them, the element additives are calcium, magnesium, zinc, iron, copper and boron.

[0035] Among them, the element additives are added in the following forms: calcium element is calcium nitrate, calcium chloride or calcium acetate; magnesium element is magnesium nitrate, magnesium chloride or magnesium sulfate; zinc element is zinc acetate, zinc nitrate or zinc chloride; iron element is ferrous sulfate heptahydrate or ferric chloride; copper element is copper nitrate or copper sulfate; and boron element is sodium tetraborate decahydrate.

[0036] The characteristics of the present invention are:

[0037] 1) Fish viscera are rich in nitrogen, phosphorus and potassium, and their protein is converted into organic fertilizer and biological enzyme after fermentation. It is a very good fertilizer. If used directly, it will cause seedling burning. The fermentation process is cumbersome and has odor, so most fish viscera are directly discarded in life, which not only wastes resources but also causes environmental pollution. The present invention uses Chinese medicine residues and orange peels to ferment with fish viscera, and utilizes the porous characteristics of Chinese medicine residues to absorb odors, and the fragrance of Chinese medicine and orange peels can cover up the odor. In addition, fish viscera can also be replaced with sterilized dead pigs, which is conducive to the harmless treatment of dead pigs.

[0038] 2) The compounding of the specific bacterial liquid of the present invention has the following effects: the enzyme produced by Staphylococcus carnosus during the fermentation process can not only promote the decomposition of protein and fat in meat, but also promote the formation of aroma. Staphylococcus carnosus can also inhibit rancidity caused by hydrogen peroxide, but Staphylococcus carnosus can hydrolyze fat and significantly increase the content of free fatty acids, and plants cannot absorb fatty acids, so Lactobacillus casei and Lactobacillus acidophilus are compounded to degrade fatty acids, but the degradation rate is still very slow, so the present invention compounds a fermentation aid, which is compounded by disodium maleate and ergosterol according to a specific ratio. Disodium maleate can enhance the decomposition of fatty acids by lactobacillus, but it will cause the permeability of fungal cell membranes to decrease. Although it will make the degradation of fatty acids more thorough, it will prolong the degradation time. The compounded ergosterol can enhance the fluidity of the cell membrane and the activity of membrane-bound enzymes, so that the degradation efficiency of fatty acids will be improved as a whole. After the fatty acid content rises in the later stage, the degradation can be completed faster, shortening the overall fermentation time. In addition, Lactobacillus casei can inhibit and kill many spoilage bacteria and pathogenic bacteria, thereby reducing the rancid smell; Lactobacillus acidophilus has a good ability to hydrolyze protein and can increase the amino acid content in fermented milk; other macromolecular organic matter and insoluble inorganic matter can be lysed by adding Aspergillus niger.

[0039] 3) After the amino acid organic fertilizer is applied, the amino acids therein are easily washed away by rain or damaged by light before being absorbed by crops, which causes great waste. In order to reduce waste and reduce the number of repeated fertilizations, the present invention uses straw cellulose mixed with fermented materials rich in amino acids. The straw cellulose can produce viscosity when it meets water and adhere to the soil, which can prevent the fertilizer from being washed away by rain.

[0040] 4) Tea dregs are usually discarded, but they contain antioxidants such as polyphenol compounds and catechins, which can be used to extract natural antioxidants. In addition, tea dregs also contain a variety of trace elements, such as iron, zinc, molybdenum, manganese, etc., which can promote the growth and development of plants. At the same time, tea dregs also contain organic matter, which can improve soil structure, enhance soil water and fertilizer retention capacity, and be beneficial to plant root development and nutrient absorption. However, using tea dregs alone will make the soil alkaline, affecting crop growth, so the present invention is compounded with grape seeds, the organic acids and tannic acid in the grape seeds can neutralize the alkalinity of the tea dregs, grape seeds are waste in the production process of wine or grape juice, and grape seeds are rich in flavonoids and proanthocyanidins and other antioxidants, which are used in combination with tea dregs to further prevent amino acids from being oxidized by light.

[0041] 5) More than 50% of the soil in my country lacks trace elements, which directly leads to the fact that no matter how much nitrogen, phosphorus and potassium fertilizers are added, crop yields cannot be increased, but instead it leads to crop yield reduction and reduced quality of agricultural products. If the corresponding trace elements are applied directly, they are easily fixed in the soil, difficult to be absorbed and utilized by crops, and easy to antagonize with nitrogen, phosphorus and potassium fertilizers. Chelated trace elements can be used to avoid the above situation. Compared with other similar chelated fertilizers, one of the advantages of sugar alcohol as a chelating agent is that after chelating with trace elements, it can carry the target elements for transportation in the phloem of plants, improve the mobility of mineral elements, and alleviate plant deficiency symptoms. Sugar alcohol is also the main photosynthetic product of many plants. It can regulate the growth and development of plants to varying degrees, improve the ability of plants to cope with stress, and exogenous application of sugar alcohols can also provide carbon nutrition for plants. Compared with conventional sugar alcohol substances, the 1,4-dithioerythritol used in the present invention contains two thiol groups and an epoxy group, which gives it a higher chelating property. However, the thiol group itself is easily oxidized, so the present invention is compounded with N-ethylmaleimide, which not only has the function of protecting the thiol group from oxidation, but also can increase the hydrophobicity of the film, delay the disintegration time of the film, and achieve a sustained release effect. At the same time, it can also prevent and treat a variety of plant diseases, including gray mold, downy mildew, powdery mildew, etc. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below in conjunction with the embodiments.

[0043] Unless otherwise specified, the raw materials or chemical reagents used in the embodiments of the present invention are obtained through conventional commercial channels.

[0044] Example 1

[0045] This embodiment includes the following steps:

[0046] A method for preparing organic compost is:

[0047] 1) Preparation of activated bacterial solution:

[0048] Add 1kg of Aspergillus niger, 1kg of Lactobacillus casei, 1kg of Lactobacillus acidophilus, and 2kg of Staphylococcus carnosus into 10L of 10% brown sugar water, stir evenly, and place in an environment with a temperature of 28-32°C for 12 hours to obtain an activated bacterial solution;

[0049] 2) Preparation of fermentation aids:

[0050] 150 g of ergosterol was added to 1.5 L of 70% ethanol solution at 47° C., and dispersed at 400 r / min for 10 min. Then 300 g of disodium maleate was added to 2 L of distilled water at 47° C., and dispersed at 200 r / min for 10 min. Then the two solutions were mixed, and dispersed at a rate of 350 r / min for 10 min to obtain a fermentation aid.

[0051] 3) Preparation of viscous additives:

[0052] Cut rice straw into sections, wash with distilled water, and then cook at 100°C for 1.5h. Take out, dry, and crush through a 30-mesh sieve to obtain rice straw powder; immerse the rice straw powder in a 30% NaOH solution, stir and react at 73°C at a rate of 350r / min for 2h, and centrifuge and wash until neutral for use; immerse the alkali-treated rice straw powder in a 30% sodium chlorite solution, adjust the pH to 3.5 with a 30% acetic acid solution, place in a constant temperature water bath, and stir and react at a rate of 350r / min at 55°C for 2h; wash the acid-treated rice straw powder twice with distilled water, and then dry at 85°C to obtain rice straw cellulose; mix 13kg of rice straw cellulose, 6kg of tea residues, and 1.5kg of grape seeds, and crush through a 60-mesh sieve to obtain a viscous additive;

[0053] 4) Preparation of chelating synergistic coating agent:

[0054] 11 kg of 1,4-dithioerythritol was weighed and added to 130 L of distilled water, and then placed in a constant temperature water bath at 63° C., stirred and dissolved at a rate of 350 r / min for 13 min, and 7.2 kg of element additives were added: including 1.2 kg of calcium nitrate, 1.2 kg of magnesium chloride, 1.2 kg of zinc acetate, 1.2 kg of ferric chloride, 1.2 kg of copper sulfate, and 1.2 kg of sodium tetraborate decahydrate, and then the temperature was raised to 83° C., the stirring rate was adjusted to 80 r / min, and the stirring was continued for 23 min to obtain a chelate solution; 4 kg of N-ethylmaleimide was added to 60 L of 70% ethanol solution, and dispersed at a high speed of 1200 r / min for 5 min, and then mixed with the above chelate solution, and continued to disperse at a high speed of 3000 r / min for 10 min to obtain a chelate synergistic coating agent;

[0055] 5) Pre-fermentation:

[0056] Add 45kg of fish viscera, 25kg of Chinese medicine residue, 15kg of orange peel, 600ml of fermentation aid, and 1.5L of activated bacterial solution into a fermentation container, stir evenly, cover with plastic film and seal for fermentation, maintain the fermentation environment temperature between 28-32°C, and obtain the fermentation product after fermentation for 15.5 days;

[0057] 6) Mixed fermentation:

[0058] The fermented material was mixed with 55 kg of biogas residue and piled into a 55 cm high mound. After 7.5 days of fermentation, it was crushed through a 60 mesh sieve to obtain the fermented material.

[0059] 7) Granulation and coating:

[0060] 20kg of fermented material and 10kg of viscous additive were mixed evenly in a ratio of 2:1 and then transported to a low-temperature organic fertilizer granulator. A mold with a 9mm aperture was selected to collect organic fertilizer particles at the discharge port. The organic fertilizer particles were put into the material port of the fluidized bed, 30L of chelating synergistic coating agent was added, the fluidized bed flow rate was set to 1.5m / s, the temperature was set to 45°C, the blower was turned on and the nozzle pressure was adjusted to 1.1Mpa, and the outlet was continued to dry for 8min to obtain amino acid organic fertilizer.

[0061] Example 2

[0062] This embodiment includes the following steps:

[0063] A method for preparing organic compost is:

[0064] 1) Preparation of activated bacterial solution:

[0065] Add 1kg of Aspergillus niger, 1kg of Lactobacillus casei, 1kg of Lactobacillus acidophilus, and 2kg of Staphylococcus carnosus into 10L of 10% brown sugar water, stir evenly, and place in an environment with a temperature of 28-32°C for 12 hours to obtain an activated bacterial solution;

[0066] 2) Preparation of fermentation aids:

[0067] 100 g of ergosterol was added to 1.5 L of 70% ethanol solution at 45° C., and dispersed at 400 r / min for 10 min. Then 200 g of disodium maleate was added to 2 L of distilled water at 45° C., and dispersed at 200 r / min for 10 min. Then the two solutions were mixed, and dispersed at a rate of 350 r / min for 10 min to obtain a fermentation aid.

[0068] 3) Preparation of viscous additives:

[0069] Cut the rice straw into sections, wash it with distilled water, and then cook it at 100°C for 1 hour. Take it out, dry it, and crush it through a 30-mesh sieve to obtain rice straw powder; immerse the rice straw powder in a 30% NaOH solution, stir it at 70°C at a rate of 350r / min for 2 hours, and centrifuge it to neutral for use; immerse the rice straw powder after alkali treatment in a 30% sodium chlorite solution, adjust the pH to 3.5 with a 30% acetic acid solution, place it in a constant temperature water bath, and stir it at a rate of 350r / min for 2 hours at 50°C; wash the rice straw powder after acid treatment with distilled water twice, and then dry it at 85°C to obtain rice straw cellulose; 10kg of rice straw cellulose, 5kg of tea residues and 1kg of grape seeds are evenly mixed and crushed through a 60-mesh sieve to obtain a viscous additive;

[0070] 4) Preparation of chelating synergistic coating agent:

[0071] Weigh 10 kg of 1,4-dithioerythritol and add it to 100 L of distilled water, then place it in a constant temperature water bath at 60° C., stir and dissolve it at a rate of 350 r / min for 10 min, add 6 kg of element additives: including 1 kg of calcium nitrate, 1 kg of magnesium chloride, 1 kg of zinc acetate, 1 kg of ferric chloride, 1 kg of copper sulfate, and 1 kg of sodium tetraborate decahydrate, then raise the temperature to 80° C., adjust the stirring rate to 80 r / min, and continue stirring for 20 min to obtain a chelate solution; add 3 kg of N-ethylmaleimide to 50 L of 70% ethanol solution, disperse it at a high speed of 1200 r / min for 5 min, then mix it with the above chelate solution, and continue to disperse it at a high speed of 3000 r / min for 10 min to obtain a chelate synergistic coating agent;

[0072] 5) Pre-fermentation:

[0073] 40kg of fish viscera, 20kg of Chinese medicine residue, 10kg of orange peel, 500ml of fermentation aid, and 1L of activated bacterial solution were added into a fermentation container, stirred evenly, covered with plastic film and sealed for fermentation, and the fermentation environment temperature was maintained between 28-32°C. After fermentation for 16 days, the fermented product was obtained;

[0074] 6) Mixed fermentation:

[0075] The fermented material was mixed with 50 kg of biogas residue and piled into a 50 cm high mound. After 8 days of fermentation, it was crushed through a 60 mesh sieve to obtain the fermented material.

[0076] 7) Granulation and coating:

[0077] 20kg of fermented material and 10kg of viscous additive were mixed evenly in a ratio of 2:1 and then transported to a low-temperature organic fertilizer granulator. A mold with a 9mm aperture was selected to collect organic fertilizer particles at the discharge port. The organic fertilizer particles were put into the material port of the fluidized bed, 30L of chelating synergistic coating agent was added, the fluidized bed flow rate was set to 1m / s, the temperature was set to 40°C, the blower was turned on and the nozzle pressure was adjusted to 1Mpa, and the outlet was continued to dry for 5min to obtain amino acid organic fertilizer.

[0078] Example 3

[0079] This embodiment includes the following steps:

[0080] A method for preparing organic compost is:

[0081] 1) Preparation of activated bacterial solution:

[0082] Add 1kg of Aspergillus niger, 1kg of Lactobacillus casei, 1kg of Lactobacillus acidophilus, and 2kg of Staphylococcus carnosus into 10L of 10% brown sugar water, stir evenly, and place in an environment with a temperature of 28-32°C for 12 hours to obtain an activated bacterial solution;

[0083] 2) Preparation of fermentation aids:

[0084] 200 g of ergosterol was added to 1.5 L of 70% ethanol solution at 50° C., and dispersed at 400 r / min for 10 min. Then 400 g of disodium maleate was added to 2 L of distilled water at 50° C., and dispersed at 200 r / min for 10 min. Then the two solutions were mixed, and dispersed at a rate of 350 r / min for 10 min to obtain a fermentation aid.

[0085] 3) Preparation of viscous additives:

[0086] Cut the rice straw into sections, wash it with distilled water, and then cook it at 100°C for 2h. Take it out, dry it, and crush it through a 30-mesh sieve to obtain rice straw powder; immerse the rice straw powder in a 30% NaOH solution, stir it at 75°C at a rate of 350r / min for 2h, and centrifuge it to neutral for use; immerse the rice straw powder after alkali treatment in a 30% sodium chlorite solution, adjust the pH to 3.5 with a 30% acetic acid solution, place it in a constant temperature water bath, and stir it at 60°C at a rate of 350r / min for 2h; wash the rice straw powder after acid treatment with distilled water twice, and then dry it at 85°C to obtain rice straw cellulose; mix 15kg of rice straw cellulose, 7kg of tea residues and 2kg of grape seeds, and then crush them through a 60-mesh sieve to obtain a viscous additive;

[0087] 4) Preparation of chelating synergistic coating agent:

[0088] 12 kg of 1,4-dithioerythritol was weighed and added to 150 L of distilled water, and then placed in a constant temperature water bath at 65° C., stirred and dissolved at a rate of 350 r / min for 15 min, and 7.8 kg of element additives were added: including 1.3 kg of calcium nitrate, 1.3 kg of magnesium chloride, 1.3 kg of zinc acetate, 1.3 kg of ferric chloride, 1.3 kg of copper sulfate, and 1.3 kg of sodium tetraborate decahydrate, and then the temperature was raised to 85° C., the stirring rate was adjusted to 80 r / min, and the stirring was continued for 25 min to obtain a chelate solution; 5 kg of N-ethylmaleimide was added to 70 L of 70% ethanol solution, and dispersed at a high speed of 1200 r / min for 5 min, and then mixed with the above chelate solution, and continued to disperse at a high speed of 3000 r / min for 10 min to obtain a chelate synergistic coating agent;

[0089] 5) Pre-fermentation:

[0090] 50 kg of fish viscera, 30 kg of Chinese medicine residue, 20 kg of orange peel, 700 ml of fermentation aid, and 2 L of activated bacterial solution were added to the fermentation container, stirred evenly, covered with plastic film and sealed for fermentation, and the fermentation environment temperature was maintained between 28-32°C. After fermentation for 16.5 days, the fermentation product was obtained;

[0091] 6) Mixed fermentation:

[0092] The fermented material was mixed with 60 kg of biogas residue and piled into a 60 cm high mound. After 7 days of fermentation, it was crushed through a 60 mesh sieve to obtain the fermented material.

[0093] 7) Granulation and coating:

[0094] 20kg of fermented material and 10kg of viscous additive were mixed evenly in a ratio of 2:1 and then transported to a low-temperature organic fertilizer granulator. A mold with a 9mm aperture was selected to collect organic fertilizer particles at the discharge port. The organic fertilizer particles were put into the material port of the fluidized bed, 30L of chelating synergistic coating agent was added, the fluidized bed flow rate was set to 2m / s, the temperature was set to 50°C, the blower was turned on and the nozzle pressure was adjusted to 1.2Mpa, and the outlet was continued to dry for 10min to obtain amino acid organic fertilizer.

[0095] Comparative Example 1

[0096] The difference between this comparative example and Example 1 is:

[0097] Step 2) preparing a fermentation aid:

[0098] Add 150 g of ergosterol into 1.5 L of 70% ethanol solution at 47°C and disperse at 400 r / min for 10 min to obtain a fermentation aid;

[0099] The rest is the same as in Example 1.

[0100] Comparative Example 2

[0101] The difference between this comparative example and Example 1 is:

[0102] Step 2) preparing a fermentation aid:

[0103] 300 g of disodium maleate was added into 2 L of distilled water at 47°C and dispersed at 200 r / min for 10 min to obtain a fermentation aid;

[0104] The rest is the same as in Example 1.

[0105] Comparative Example 3

[0106] The difference between this comparative example and Example 1 is:

[0107] Step 3) Preparation of viscous additives:

[0108] 13 kg of high viscosity loess and 1.5 kg of grape seeds were mixed evenly and then crushed through a 60-mesh sieve to obtain a viscous additive;

[0109] The rest is the same as in Example 1.

[0110] Comparative Example 4

[0111] The difference between this comparative example and Example 1 is:

[0112] Step 3) Preparation of viscous additives:

[0113] Cut rice straw into sections, wash with distilled water, and then cook at 100°C for 1.5h. Take out, dry, and crush through a 30-mesh sieve to obtain rice straw powder; immerse the rice straw powder in a 30% NaOH solution, stir and react at 73°C at a rate of 350r / min for 2h, and centrifuge and wash until neutral for use; immerse the alkali-treated rice straw powder in a 30% sodium chlorite solution, adjust the pH to 3.5 with a 30% acetic acid solution, place in a constant temperature water bath, and stir and react at a rate of 350r / min at 55°C for 2h; wash the acid-treated rice straw powder twice with distilled water, and then dry at 85°C to obtain rice straw cellulose; mix 13kg of rice straw cellulose, 6kg of tea residues, and 1.5kg of grape seeds, and crush through a 60-mesh sieve to obtain a viscous additive;

[0114] The rest is the same as in Example 1.

[0115] Comparative Example 5

[0116] The difference between this comparative example and Example 1 is:

[0117] Step 3) Preparation of viscous additives:

[0118] Cut the rice straw into sections, wash it with distilled water, and then cook it at 100°C for 1.5h. Take it out, dry it, and crush it through a 30-mesh sieve to obtain rice straw powder; immerse the rice straw powder in a 30% NaOH solution, stir it at 73°C at a rate of 350r / min for 2h, and centrifuge it to neutral for use; immerse the rice straw powder after alkali treatment in a 30% sodium chlorite solution, adjust the pH to 3.5 with a 30% acetic acid solution, place it in a constant temperature water bath, and stir it at a rate of 350r / min for 2h at 55°C; wash the rice straw powder after acid treatment with distilled water twice, and then dry it at 85°C to obtain rice straw cellulose; 13kg of rice straw cellulose and 6kg of tea residues are evenly mixed and crushed through a 60-mesh sieve to obtain a viscous additive;

[0119] The rest is the same as in Example 1.

[0120] Comparative Example 6

[0121] The difference between this comparative example and Example 1 is that: Step 7) Granulation coating:

[0122] 20kg of fermented material and 10kg of viscous additive were mixed evenly at a ratio of 2:1 and then transported to a low-temperature organic fertilizer granulator. A die with a 9mm aperture was selected and the amino acid organic fertilizer was collected at the outlet;

[0123] The rest is the same as in Example 1.

[0124] Comparative Example 7

[0125] The difference between this comparative example and Example 1 is:

[0126] Step 4) preparing a chelating synergistic coating agent:

[0127] 11 kg of sorbitol was weighed and added to 130 L of distilled water, and then placed in a constant temperature water bath at 63° C., stirred and dissolved at a rate of 350 r / min for 13 min, and 7.2 kg of element additives were added: including 1.2 kg of calcium nitrate, 1.2 kg of magnesium chloride, 1.2 kg of zinc acetate, 1.2 kg of ferric chloride, 1.2 kg of copper sulfate, and 1.2 kg of sodium tetraborate decahydrate, and then the temperature was raised to 83° C., the stirring rate was adjusted to 80 r / min, and the stirring was continued for 23 min to obtain a chelate solution; 4 kg of N-ethylmaleimide was added to 60 L of 70% ethanol solution, and dispersed at a high speed of 1200 r / min for 5 min, and then mixed with the above chelate solution, and continued to disperse at a high speed of 3000 r / min for 10 min to obtain a chelate synergistic coating agent;

[0128] The rest is the same as in Example 1.

[0129] Comparative Example 8

[0130] The difference between this comparative example and Example 1 is:

[0131] Step 4) preparing a chelating synergistic coating agent:

[0132] Weigh 11 kg of 1,4-dithioerythritol and add it to 130 L of distilled water, then place it in a constant temperature water bath at 63°C, stir and dissolve it at a rate of 350 r / min for 13 minutes, add 7.2 kg of element additives: including 1.2 kg of calcium nitrate, 1.2 kg of magnesium chloride, 1.2 kg of zinc acetate, 1.2 kg of ferric chloride, 1.2 kg of copper sulfate, 1.2 kg of sodium tetraborate decahydrate, then raise the temperature to 83°C, adjust the stirring rate to 80 r / min, and continue stirring for 23 minutes to obtain a chelating synergistic coating agent;

[0133] The rest is the same as in Example 1.

[0134] experiment:

[0135] 1) Fatty acid content: The total fatty acid content in the fermented product after pre-fermentation in Example 1-3 and Comparative Example 1-2 was measured by gas chromatography, as shown in Table 1;

[0136] 2) Total fermentation time: Calculate the total time of pre-fermentation and mixed fermentation during the preparation of Examples 1-3 and Comparative Examples 1-2, see Table 1;

[0137] 3) Rainwater erosion resistance: 10 g of the amino acid organic fertilizer prepared in Examples 1-3 and Comparative Examples 3-5 were taken, and the nutrients of the amino acid organic fertilizers of each group were measured using an LD-GT80 soil fertilizer nutrient detector. Then, each group of amino acid organic fertilizers was mixed with 5 kg of homogeneous soil and added to a container, and then 2 L of distilled water was added, and the mixture was stirred at a rate of 300 r / min for 5 h. After standing and stratification, the supernatant was taken and measured using an LD-GT80 soil fertilizer nutrient detector. The ratio of nutrients dissolved in the supernatant and not adsorbed by the soil to the total nutrients of the fertilizer was used to represent the rainwater erosion resistance of the amino acid organic fertilizer. The larger the ratio, the weaker the rainwater erosion resistance, as shown in Table 1;

[0138] 4) Light degradation resistance: The free amino acid content in the amino acid organic fertilizers prepared in Examples 1-3 and Comparative Examples 4-5 was measured according to the method for measuring the free amino acid content in the NY / T 1975-2010 standard, and then each group of amino acid organic fertilizers was crushed into particles with a particle size of 60 mesh and irradiated under a fluorescent lamp for 8 hours, and then the free amino acid content was measured again. The ratio of the free amino acid content after irradiation to the free amino acid content before irradiation represents the light degradation resistance of the amino acid organic fertilizer. The larger the ratio, the stronger the light degradation resistance, as shown in Table 1;

[0139] 5) Slow-release performance: The amino acid organic fertilizers prepared in Examples 1-3 and Comparative Examples 6-8 were measured according to the method in NY / T2267-2016 standard to measure the 24h initial release rate and 28d cumulative release rate of nutrients in each group of amino acid organic fertilizers, as shown in Table 1;

[0140] 6) Determination of effective trace elements: The effective trace elements in the amino acid organic fertilizers prepared in Examples 1-3 and Comparative Examples 6-8 were determined using a FK-CT04 organic fertilizer trace element detector, as shown in Table 2.

[0141] Table 1

[0142]

[0143] Table 2

[0144]

[0145]

Claims

1. An amino acid organic fertilizer, characterized in that: The preparation method of the organic fertilizer comprises the following steps: 1) Pre-fermentation: Add 40-50 parts of fish viscera, 20-30 parts of Chinese medicine residue, 10-20 parts of orange peel, 0.5-0.7 parts of fermentation aid, and 1-2 parts of activated bacterial solution into a fermentation container, stir evenly, cover with plastic film and seal for fermentation, maintain the fermentation environment temperature between 28-32°C, measure the internal temperature of the fermentation every day, and obtain the fermentation product when the fermentation temperature is measured twice and is below 40°C; 2) Mixed fermentation: The fermented material was mixed with 50-60 parts of biogas residue and piled into a 50-60 cm high soil pile. The internal temperature of the fermentation pile was measured every day. When the temperature exceeded 60°C, an organic fertilizer turning machine was used to turn the pile once. When the fermentation temperature was measured twice and was below 35°C, the fermentation was completed. Then, the fermented material was crushed through a 60-mesh sieve to obtain the fermented material. 3) Granulation and coating: The fermented material and the viscous additive are mixed evenly in a ratio of 2:1 and then put into a low-temperature organic fertilizer granulator for granulation, and then coated with a layer of chelating synergistic coating agent through a fluidized bed to obtain amino acid organic fertilizer; The preparation method of the activated bacterial solution is: Add 1 part of Aspergillus niger, 1 part of Lactobacillus casei, 1 part of Lactobacillus acidophilus, and 2 parts of Staphylococcus carnosus to 10 parts of 10% brown sugar water, stir evenly, and place in an environment with a temperature of 28-32°C for 12 hours to obtain an activated bacterial solution; The preparation method of the fermentation aid is: Add 1-2 parts of ergosterol to 1.5 parts of 70% ethanol solution at 45-50°C, disperse at 400r / min for 10 minutes, then add 2-4 parts of disodium maleate to 2 parts of distilled water at 40-50°C, disperse at 200r / min for 10 minutes, then mix the above two solutions, disperse at 350r / min for 10 minutes to obtain a fermentation aid.

2. An amino acid organic fertilizer as claimed in claim 1, characterized in that: The specific method of step 3) granulation coating is: i. Mix the fermented material and the viscous additive in a ratio of 2:1 and transport it to a low-temperature organic fertilizer granulator. Use a mold with an aperture of 8-10mm and collect the organic fertilizer particles at the outlet; ii. Put the above organic fertilizer particles into the material port of the fluidized bed, add a chelating synergistic coating agent in a mass volume ratio of 1:1 to the organic fertilizer particles, set the fluidized bed flow rate to 1-2m / s, the temperature to 40-50℃, turn on the blower and adjust the nozzle pressure to 1-1.2Mpa, and continue drying at the outlet for 5-10min.

3. An amino acid organic fertilizer as claimed in claim 1, characterized in that: The preparation method of the viscosity additive is: a. Rice straw pretreatment: Cut the rice straw into sections, wash with distilled water, and then steam at 100°C for 1-2 hours. Take it out, dry it, and grind it through a 30-mesh sieve to obtain rice straw powder. b. Alkali treatment: The rice straw powder was immersed in a 30% NaOH solution, stirred at 70-75°C at a rate of 350 r / min for 2 h, and centrifuged and washed until neutral for later use; c. Acid treatment: The alkali-treated rice straw powder was immersed in a 30% sodium chlorite solution, the pH was adjusted to 3.5 using a 30% acetic acid solution, and the powder was placed in a constant temperature water bath and stirred at 350 r / min at 50-60°C for 2 h. d. Washing: The rice straw powder after acid treatment is washed with distilled water for 2-3 times and then dried at 80-90°C to obtain rice straw cellulose; e. Mixing: 10-15 parts of rice straw cellulose, 5-7 parts of tea residues and 1-2 parts of grape seeds are mixed evenly and then crushed through a 60-mesh sieve to obtain a viscous additive.

4. An amino acid organic fertilizer as claimed in claim 1, characterized in that: The preparation method of the chelating synergistic coating agent is as follows: I. Weigh 10-12 parts of 1,4-dithioerythritol and add it to 10-15 parts of distilled water, then place it in a constant temperature water bath at 60-65°C, stir and dissolve it at a rate of 350r / min for 10-15min, add 6-8 parts of element additives, then raise the temperature to 80-85°C, adjust the stirring rate to 80r / min, and continue stirring for 20-25min to obtain a chelate solution; II. Add 3-5 parts of N-ethylmaleimide to 5-7 parts of 70% ethanol solution, disperse at a high speed of 1200r / min for 5 minutes, then mix with the above chelate solution, and continue to disperse at a high speed of 3000r / min for 10 minutes to obtain a chelating synergistic coating agent.

5. An amino acid organic fertilizer as claimed in claim 4, characterized in that: The element additives are calcium, magnesium, zinc, iron, copper and boron; the element additives are added in the following forms: calcium element is calcium nitrate, calcium chloride or calcium acetate; magnesium element is magnesium nitrate, magnesium chloride or magnesium sulfate; zinc element is zinc acetate, zinc nitrate or zinc chloride; iron element is ferrous sulfate heptahydrate or ferric chloride; copper element is copper nitrate or copper sulfate; and boron element is sodium tetraborate decahydrate.

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