Organic fertilizer containing humic acid as well as preparation method and application of organic fertilizer

Abstract

The invention belongs to the technical field of biological fertilizers, and discloses an organic fertilizer containing humic acid as well as a preparation method and application thereof. The organic fertilizer containing humic acid is prepared from the following preparation raw materials in parts by mass: 30 to 55 parts of humic acid, 15 to 20 parts of peat, 10 to 15 parts of organic substances, 10 to 15 parts of urea, 10 to 15 parts of plant ash, 2 to 6 parts of complex microbial inoculants, 1 to 3 parts of trace elements, 0.3 to 0.5 part of animal fat and 0.5 to 1 part of adhesive, wherein the organic substances comprise straws and animal wastes. The organic fertilizer containing humic acid provided by the invention not only contains a large amount of organic matters, but also contains a large amount of salt capable of quickly playing a role, and can realize the functions of a quick-acting fertilizer and an organic fertilizer at the same time.

Description

Technical Field

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

[0002] With the development of agricultural modernization, the requirements for soil quality and crop yield and quality are increasing day by day. Although traditional chemical fertilizers can provide nutrients for crops in the short term and achieve a certain yield increase effect, long-term and large-scale use will lead to a series of problems such as soil structure destruction, decreased fertility, and environmental pollution. For example, excessive application of nitrogen fertilizers will cause soil compaction, reduce soil aeration and water retention, and affect the growth and development of crop roots; excessive use of phosphate fertilizers will lead to phosphorus accumulation in the soil, causing environmental problems such as eutrophication of water bodies. Therefore, it is urgent to develop a green and environmentally friendly fertilizer that can provide comprehensive nutrients and improve soil quality.

[0003] As a natural organic macromolecule, humic acid has unique advantages in soil improvement and fertilizer efficiency. It can promote the formation of soil aggregate structure, improve the soil's ability to retain water and fertilizer, enhance the soil's buffering properties, and create a good soil environment for crop growth. At the same time, humic acid can also complex and chelate with nutrients in fertilizers, reduce nutrient fixation and loss, and improve fertilizer utilization. However, single humic acid fertilizers are insufficient in terms of comprehensiveness and balance of nutrient supply. At present, there are many kinds of organic fertilizer products on the market, but most products are not scientific and reasonable in formula design, and cannot give full play to the synergistic effect of various components. The humic acid content of some products is too low, which cannot effectively improve the soil structure and improve the utilization rate of fertilizers; the selection and ratio of composite microbial agents in some products are unreasonable, resulting in low microbial activity and poor conversion effect on soil nutrients. Summary of the invention

[0004] The object of the present invention is to provide an organic fertilizer containing humic acid and a preparation method and application thereof, so as to solve the problems existing in the prior art.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The present invention provides an organic fertilizer containing humic acid, comprising the following raw materials in parts by weight:

[0007] Humic acid 30-55 parts, peat 15-20 parts, organic matter 10-15 parts, urea 10-15 parts, plant ash 10-15 parts, composite bacterial agent 2-6 parts, trace elements 1-3 parts, animal fat 0.3-0.5 parts, adhesive 0.5-1 parts;

[0008] The organic matter includes straw and animal manure.

[0009] Preferably, the mass ratio of the straw to the animal manure is 1-3:1-3.

[0010] Preferably, the composite bacterial agent includes Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and Bacillus azotobacter.

[0011] Preferably, the mass ratio of Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and Bacillus azotobacter is 1-3:1-3:1-3:1.2-2:1.2-2:1.5-3.

[0012] Preferably, the trace elements include zinc sulfate, borax and ammonium molybdate;

[0013] Preferably, the mass ratio of the zinc sulfate, borax and ammonium molybdate is 1-3:1-2:1-2.

[0014] The present invention also provides a method for preparing an organic fertilizer containing humic acid, comprising the following steps:

[0015] (1) subjecting peat, straw and animal manure to anaerobic fermentation to obtain a first product;

[0016] (2) mixing the first product, humic acid, urea, wood ash and water, then adding the composite bacterial agent and trace elements, cooling the mixture to 10-15° C., and then granulating the mixture to obtain mixture particles;

[0017] (3) The animal fat is melted and sprayed on the surface of the mixture particles, and then an adhesive is sprayed on the resulting product to obtain an organic fertilizer containing humic acid.

[0018] Preferably, the anaerobic fermentation time in step (1) is 5 to 6 days.

[0019] Preferably, after the anaerobic fermentation in step (1) is completed, the method further comprises:

[0020] Drying the product obtained after anaerobic fermentation to obtain a first product;

[0021] The drying temperature is 50-60°C.

[0022] The invention also provides application of an organic fertilizer containing humic acid in crop growth.

[0023] It can be seen from the above technical solution that compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) The humic acid-containing organic fertilizer provided by the present invention comprises humic acid, peat, organic matter, urea, plant ash, composite bacterial agent, trace elements, animal fat and adhesive. The organic fertilizer contains not only a large amount of organic matter but also a large amount of salt that can act quickly, and can realize the functions of quick-acting fertilizer and organic fertilizer at the same time. Among them, humic acid has strong ion exchange and adsorption capacity, can combine with nitrogen in urea, slow down the release rate of nitrogen, reduce nitrogen volatilization and loss, and improve the utilization rate of urea; it can complex with mineral nutrients such as potassium and calcium in plant ash to enhance the stability and effectiveness of these nutrients in the soil; it can also promote the decomposition and transformation of organic matter, making it easier for crops to absorb and utilize; humic acid can also chelate trace elements to prevent them from being fixed by the soil, improve the activity of trace elements, and ensure that crops can absorb various nutrients in a balanced manner; at the same time, humic acid and peat can promote the formation of soil aggregate structure. Humic acid binds soil particles together through its own colloidal properties and bonding effects; peat increases the porosity of the soil due to its porosity and rich organic matter. The two work synergistically to significantly improve the air permeability, water permeability and water retention of the soil, create a good soil environment for the growth of crop roots, and improve the fertility of the soil. Animal fats and adhesives can ensure the survival rate of compound bacterial agents and improve the utilization rate of organic fertilizers. In addition, anaerobic fermentation can convert the nutrients in animal manure and urine into fast-acting nutrients that can be directly absorbed and utilized by plants. At the same time, crop straw and peat prevent the loss of fast-acting nutrients and increase the organic matter content through adsorption after anaerobic fermentation.

[0025] (2) The present invention uses a composite bacterial agent in combination with a humic acid fertilizer. Humic acid can promote the growth and reproduction of composite microorganisms. When Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and Bacillus nitrogen-fixing are selected as composite bacterial agents and applied together with other components of the aforementioned organic fertilizer, the soil activation speed can be accelerated and the soil organic matter content can be increased. The addition of the aforementioned microbial community can promote the formation of soil aggregate structure, thereby improving the soil's air permeability and water and fertilizer retention properties (repairing soil compaction). In addition, the addition of the composite microbial community is beneficial to activating trace elements in the organic fertilizer, accelerating nutrient conversion, increasing soil organic matter content, and regulating soil pH.

[0026] (3) By selecting zinc sulfate, borax and ammonium molybdate as trace elements and adjusting the mass ratio of zinc sulfate, borax and ammonium molybdate, the effect of organic fertilizer can be effectively exerted, and the absorption of organic fertilizer by crops can be promoted, thereby achieving the effect of increasing production. DETAILED DESCRIPTION

[0027] The present invention provides an organic fertilizer containing humic acid, comprising the following raw materials in parts by weight:

[0028] 30-55 parts of humic acid, 15-20 parts of peat, 10-15 parts of organic matter, 10-15 parts of urea, 10-15 parts of wood ash, 2-6 parts of compound bacterial agents, 1-3 parts of trace elements, 0.3-0.5 parts of animal fats and oils, and 0.5-1 parts of adhesives.

[0029] In the present invention, the organic fertilizer comprises humic acid, peat, organic matter, urea, plant ash, composite bacterial agent, trace elements, animal fat and adhesive. The organic fertilizer not only contains a large amount of organic matter, but also has a large amount of salt that can play a role quickly, and can realize the functions of quick-acting fertilizer and organic fertilizer at the same time. Among them, humic acid has strong ion exchange and adsorption capacity, can combine with nitrogen in urea, slow down the release rate of nitrogen, reduce nitrogen volatilization and loss, and improve the utilization rate of urea; it can complex with mineral nutrients such as potassium and calcium in plant ash to enhance the stability and effectiveness of these nutrients in the soil; it can also promote the decomposition and transformation of organic matter, making it easier for crops to absorb and utilize; humic acid can also chelate trace elements to prevent them from being fixed by the soil, improve the activity of trace elements, and ensure that crops can absorb various nutrients in a balanced manner; at the same time, humic acid and peat can promote the formation of soil aggregate structure. Humic acid binds soil particles together through its own colloidal properties and bonding effects; peat increases the porosity of the soil due to its porosity and rich organic matter. The two work synergistically to significantly improve the air permeability, water permeability and water retention of the soil, create a good soil environment for the growth of crop roots, and improve the fertility of the soil. Animal fats and adhesives can ensure the survival rate of compound bacterial agents and improve the utilization rate of organic fertilizers.

[0030] According to the present invention, the mass fraction of humic acid is 30 to 35 parts. In the present invention, the appropriate humic acid content can promote the formation of soil aggregate structure, make the soil loose and porous, increase the air permeability and water permeability of the soil, and improve the soil's ability to retain water and fertilizer; at the same time, it can also improve fertilizer utilization and stimulate plant growth. As an example, the mass fraction of humic acid can be 30, 34, 35, 38, 40, 43, 45, 47, 50 parts, etc. In the present invention, if the content of humic acid is too high, because humic acid itself has a certain acidity, it will destroy the acid-base balance of the soil; at the same time, too much humic acid will cause excessive agglomeration of soil particles, resulting in a decrease in soil porosity. Although the soil agglomeration is enhanced, the number of macropores is reduced, and the soil permeability becomes worse. If the humic acid content is too low, soil particles will be difficult to effectively aggregate, reducing the soil's air permeability and water permeability; the soil's ability to retain water and fertilizer will be weakened, and the nutrients in the fertilizer will easily be lost with the water, reducing the fertilizer utilization rate; at the same time, it will also reduce the interaction between humic acid and urea and wood ash.

[0031] According to the present invention, the mass fraction of peat is 15 to 20 parts. In the present invention, the appropriate peat content can be well compatible with various fertilizer components such as humic acid, urea, and wood ash, and will not cause chemical reactions to reduce the effectiveness of the fertilizer. On the contrary, it can promote the interaction between these components to form a stable fertilizer system, so that the various nutrients in the fertilizer can better work together and improve the comprehensive effect of the fertilizer. As an example, the mass fraction of peat can be 15, 16, 17, 18, 19, 20, etc.

[0032] According to the present invention, the mass fraction of organic matter is 10 to 15 parts. In the present invention, the content of suitable organic matter can provide the soil with abundant macroelements such as nitrogen, phosphorus, potassium and various trace elements. As an example, the mass fraction of organic matter can be 10, 11, 12, 13, 14, 15 parts, etc.

[0033] According to the present invention, the mass fraction of urea is 10 to 15 parts. In the present invention, the appropriate urea content can cooperate with other fertilizer components to jointly maintain the balance of soil nutrients. In combination with organic matter, humic acid, etc., under the action of soil microorganisms, the decomposition products of urea can interact with other nutrients to achieve the coordinated supply of nitrogen and other nutrient elements. As an example, the mass fraction of urea can be 10, 11, 12, 13, 14, 15 parts, etc.

[0034] According to the present invention, the mass fraction of plant ash is 10 to 15 parts. In the present invention, if the content of plant ash is too low, it may lead to insufficient supply of certain nutrients, affecting the normal physiological function of crops; if the content is too high, some nutrients may accumulate excessively and have a toxic effect on crops. As an example, the mass fraction of plant ash can be 10, 11, 12, 13, 14, 15, etc.

[0035] According to the present invention, the mass fraction of the composite bacterial agent is 2 to 6. As an example, the mass fraction of the composite bacterial agent can be 2, 2.5, 3, 3.5, 4, 4.5, 5, etc.

[0036] According to the present invention, the mass fraction of the trace element is 1 to 3. As an example, the mass fraction of the trace element can be 1, 1.5, 2, 2.5, 3, etc.

[0037] According to the present invention, the mass fraction of animal fat is 0.3 to 0.5 parts. As an example, the mass fraction of animal fat can be 0.3, 0.35, 0.4, 0.45, 0.5 parts, etc.

[0038] According to the present invention, the weight fraction of the adhesive is 0.5 to 1. As an example, the weight fraction of the adhesive can be 0.5, 0.6, 0.7, 0.8, 0.9, 1, etc.

[0039] In the present invention, the organic matter includes straw and animal excrement.

[0040] In the present invention, the mass ratio of the straw to the animal excrement is 1 to 3: 1 to 3. As an example, the mass ratio of the straw to the animal excrement can be 1: 1, 1: 2, 1: 3, 3: 1, 2: 1, etc.

[0041] In the present invention, the composite bacterial agent includes Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and Bacillus azotobacillus. The present invention uses the composite bacterial agent in combination with humic acid fertilizer. Humic acid can promote the growth and reproduction of composite microorganisms. When Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and Bacillus azotobacillus are selected as the composite bacterial agent and applied together with other components of the aforementioned organic fertilizer, the soil activation speed can be accelerated, the soil organic matter content can be increased, and the addition of the aforementioned microbial group can promote the formation of soil aggregate structure, thereby improving the performance of soil permeability and water and fertilizer retention (repairing soil compaction). In addition, the addition of the composite microbial group is conducive to activating trace elements in the organic fertilizer, accelerating nutrient conversion, increasing soil organic matter content, regulating soil pH value and other effects.

[0042] In the present invention, the mass ratio of Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and Bacillus azotobacter is preferably 1-3:1-3:1-3:1.2-2:1.2-2:1.5-3.

[0043] In the present invention, the trace elements include zinc sulfate, borax and ammonium molybdate; the mass ratio of the zinc sulfate, borax and ammonium molybdate is 1-3:1-2:1-2. By selecting zinc sulfate, borax and ammonium molybdate as trace elements and adjusting the mass ratio of zinc sulfate, borax and ammonium molybdate within the above range, the effect of organic fertilizer can be effectively exerted, and the absorption of organic fertilizer by crops can be promoted, thereby achieving the effect of increasing production.

[0044] The present invention also provides a method for preparing an organic fertilizer containing humic acid, comprising the following steps:

[0045] (1) subjecting peat, straw and animal manure to anaerobic fermentation to obtain a first product;

[0046] (2) mixing the first product, humic acid, urea, wood ash and water, then adding the composite bacterial agent and trace elements, cooling the mixture to 10-15° C., and then granulating the mixture to obtain mixture particles;

[0047] (3) The animal fat is melted and sprayed on the surface of the mixture particles, and then an adhesive is sprayed on the resulting product to obtain an organic fertilizer containing humic acid.

[0048] In the present invention, the nutrients in animal feces and urine are converted into fast-acting nutrients that can be directly absorbed and utilized by plants through anaerobic fermentation, and crop straw and peat are adsorbed after anaerobic fermentation to prevent the loss of fast-acting nutrients and increase the organic matter content.

[0049] In the present invention, the anaerobic fermentation time in step (1) is 5 to 6 days.

[0050] In the present invention, after the anaerobic fermentation in step (1) is completed, the process further comprises:

[0051] Drying the product obtained after anaerobic fermentation to obtain a first product;

[0052] The drying temperature is 50-60° C. As an example, the drying temperature may be 50, 51, 52, 53, 54, 55, 56, 58, 59, 60° C., etc.

[0053] The invention also provides application of an organic fertilizer containing humic acid in crop growth.

[0054] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] Example 1

[0056] An organic fertilizer containing humic acid comprises the following raw materials in parts by weight:

[0057] Humic acid 30 parts, peat 16 parts, organic matter 10 parts, urea 10 parts, plant ash 11 parts, composite bacterial agent 3 parts, trace elements 2 parts, animal fat 0.5 parts, adhesive 1 part;

[0058] Among them, organic matter includes straw and animal manure, and the mass ratio of straw to animal manure is 1:2;

[0059] The composite bacterial agent includes Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus; the mass ratio of Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus is 2:1:3:2:2:3;

[0060] The trace elements include zinc sulfate, borax and ammonium molybdate; the mass ratio of zinc sulfate, borax and ammonium molybdate is 3:1:1;

[0061] The binder is sugar cane molasses;

[0062] The preparation method of organic fertilizer containing humic acid comprises the following steps:

[0063] (1) subjecting peat, straw and animal manure to anaerobic fermentation for 6 days, and drying the resulting product at 60° C. after the anaerobic fermentation to obtain a first product;

[0064] (2) mixing the first product, humic acid, urea, wood ash and water, then adding the composite bacterial agent and trace elements, cooling the mixture to 15° C., and then granulating the mixture to obtain mixture particles;

[0065] (3) The animal fat is melted and sprayed on the surface of the mixture particles, and then an adhesive is sprayed on the resulting product to obtain an organic fertilizer containing humic acid.

[0066] Example 2

[0067] An organic fertilizer containing humic acid comprises the following raw materials in parts by weight:

[0068] Humic acid 35 parts, peat 20 parts, organic matter 15 parts, urea 15 parts, plant ash 15 parts, composite bacterial agent 2 parts, trace elements 2 parts, animal fat 0.4 parts, adhesive 1 part;

[0069] Among them, organic matter includes straw and animal manure, and the mass ratio of straw to animal manure is 3:2;

[0070] The composite bacterial agent includes Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus; the mass ratio of Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus is 3:3:1.5:2:1.2:1.5;

[0071] The trace elements include zinc sulfate, borax and ammonium molybdate; the mass ratio of zinc sulfate, borax and ammonium molybdate is 3:1:1;

[0072] The binder is sugar cane molasses;

[0073] The preparation method of organic fertilizer containing humic acid comprises the following steps:

[0074] (1) subjecting peat, straw and animal manure to anaerobic fermentation for 6 days, and drying the resulting product at 60° C. after the anaerobic fermentation to obtain a first product;

[0075] (2) mixing the first product, humic acid, urea, wood ash and water, then adding the composite bacterial agent and trace elements, cooling the mixture to 15° C., and then granulating the mixture to obtain mixture particles;

[0076] (3) The animal fat is melted and sprayed on the surface of the mixture particles, and then an adhesive is sprayed on the resulting product to obtain an organic fertilizer containing humic acid.

[0077] Example 3

[0078] An organic fertilizer containing humic acid comprises the following raw materials in parts by weight:

[0079] Humic acid 40 parts, peat 18 parts, organic matter 14 parts, urea 13 parts, plant ash 10-15 parts, composite bacterial agent 4 parts, trace elements 1 part, animal fat 0.4 parts, adhesive 0.5 parts;

[0080] Among them, organic matter includes straw and animal manure, and the mass ratio of straw to animal manure is 2:3;

[0081] The composite bacterial agent includes Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus; the mass ratio of Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus is 3:2:2:2:1.2:1.5;

[0082] The trace elements include zinc sulfate, borax and ammonium molybdate; the mass ratio of zinc sulfate, borax and ammonium molybdate is 3:2:2;

[0083] The binder is sugar cane molasses;

[0084] The preparation method of organic fertilizer containing humic acid comprises the following steps:

[0085] (1) subjecting peat, straw and animal manure to anaerobic fermentation for 6 days, and drying the resulting product at 60° C. after the anaerobic fermentation to obtain a first product;

[0086] (2) mixing the first product, humic acid, urea, wood ash and water, then adding the composite bacterial agent and trace elements, cooling the mixture to 15° C., and then granulating the mixture to obtain mixture particles;

[0087] (3) The animal fat is melted and sprayed on the surface of the mixture particles, and then an adhesive is sprayed on the resulting product to obtain an organic fertilizer containing humic acid.

[0088] Example 4

[0089] An organic fertilizer containing humic acid comprises the following raw materials in parts by weight:

[0090] Humic acid 45 parts, peat 17 parts, organic matter 13 parts, urea 14 parts, plant ash 13 parts, composite bacterial agent 6 parts, trace elements 3 parts, animal fat 0.5 parts, adhesive 0.5 parts;

[0091] Among them, organic matter includes straw and animal manure, and the mass ratio of straw to animal manure is 3:1;

[0092] The composite bacterial agent includes Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus; the mass ratio of Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus is 3:1:1:2:1.2:1.5;

[0093] The trace elements include zinc sulfate, borax and ammonium molybdate; the mass ratio of zinc sulfate, borax and ammonium molybdate is 3:1:1;

[0094] The binder is sugar cane molasses;

[0095] The preparation method of organic fertilizer containing humic acid comprises the following steps:

[0096] (1) subjecting peat, straw and animal manure to anaerobic fermentation for 6 days, and drying the resulting product at 60° C. after the anaerobic fermentation to obtain a first product;

[0097] (2) mixing the first product, humic acid, urea, wood ash and water, then adding the composite bacterial agent and trace elements, cooling the mixture to 15° C., and then granulating the mixture to obtain mixture particles;

[0098] (3) The animal fat is melted and sprayed on the surface of the mixture particles, and then an adhesive is sprayed on the resulting product to obtain an organic fertilizer containing humic acid.

[0099] Example 5

[0100] An organic fertilizer containing humic acid comprises the following raw materials in parts by weight:

[0101] Humic acid 52 parts, peat 15 parts, organic matter 12 parts, urea 15 parts, plant ash 10 parts, composite bacterial agent 6 parts, trace elements 3 parts, animal fat 0.5 parts, adhesive 1 part;

[0102] Among them, organic matter includes straw and animal manure, and the mass ratio of straw to animal manure is 1:1;

[0103] The composite bacterial agent includes Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus; the mass ratio of Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and nitrogen-fixing Bacillus is 1:1:1:1.2:1.2:1.5;

[0104] The trace elements include zinc sulfate, borax and ammonium molybdate; the mass ratio of zinc sulfate, borax and ammonium molybdate is 1:1:1;

[0105] The binder is sugar cane molasses;

[0106] The preparation method of organic fertilizer containing humic acid comprises the following steps:

[0107] (1) subjecting peat, straw and animal manure to anaerobic fermentation for 6 days, and drying the resulting product at 60° C. after the anaerobic fermentation to obtain a first product;

[0108] (2) mixing the first product, humic acid, urea, wood ash and water, then adding the composite bacterial agent and trace elements, cooling the mixture to 15° C., and then granulating the mixture to obtain mixture particles;

[0109] (3) The animal fat is melted and sprayed on the surface of the mixture particles, and then an adhesive is sprayed on the resulting product to obtain an organic fertilizer containing humic acid.

[0110] Comparative Example 1

[0111] A humic acid-containing organic fertilizer is consistent with Example 1, except that it does not contain humic acid.

[0112] Comparative Example 2

[0113] An organic fertilizer containing humic acid is consistent with Example 1, except that it does not contain a composite bacterial agent.

[0114] Comparative Example 3

[0115] An organic fertilizer containing humic acid, which is consistent with Example 1, except that it does not contain peat

[0116] Comparative Example 4

[0117] A humic acid-containing organic fertilizer is consistent with Example 1, except that it does not contain urea.

[0118] Performance Testing

[0119] The experimenter divided the Chinese cabbage test field with the same fertility, sunshine and water source into 9 parts, applied 200kg of fertilizer per mu, and used the same planting method during the crop growth period. The experimental results are as follows:

[0120] Yield (kg / mu) Example 1 6900 Example 2 6850 Example 3 6974 Example 4 7100 Example 5 7156 Comparative Example 1 6030 Comparative Example 2 6274 Comparative Example 3 6181 Comparative Example 4 6345

[0121] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An organic fertilizer containing humic acid, characterized in that: The preparation comprises the following raw materials in parts by weight: 30-55 parts of humic acid, 15-20 parts of peat, 10-15 parts of organic matter, 10-15 parts of urea, 10-15 parts of plant ash, 2-6 parts of compound bacterial agent, 1-3 parts of trace elements, 0.3-0.5 parts of animal fats and oils, and 0.5-1 parts of adhesives; The organic matter includes straw and animal manure.

2. The organic fertilizer containing humic acid according to claim 1, characterized in that, The mass ratio of the straw to the animal excrement is 1-3:1-3.

3. The organic fertilizer containing humic acid according to claim 1, characterized in that, The composite bacterial agent comprises Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and Bacillus azotobacter.

4. The organic fertilizer containing humic acid according to claim 3, characterized in that, The mass ratio of Aspergillus niger, Trichoderma koningii, Trichoderma viride, Bacillus subtilis, Pseudomonas and Bacillus azotobacter is 1-3:1-3:1-3:1.2-2:1.2-2:1.5-3.

5. The organic fertilizer containing humic acid according to claim 1, characterized in that, The trace elements include zinc sulfate, borax and ammonium molybdate; And / or, the mass ratio of the zinc sulfate, borax and ammonium molybdate is 1-3:1-2:1-2.

6. The method for preparing the humic acid-containing organic fertilizer according to any one of claims 1 to 5, characterized in that: The following steps are involved: (1) subjecting peat, straw and animal manure to anaerobic fermentation to obtain a first product; (2) mixing the first product, humic acid, urea, wood ash and water, then adding the composite bacterial agent and trace elements, cooling the mixture to 10-15° C., and then granulating the mixture to obtain mixture particles; (3) The animal fat is melted and sprayed on the surface of the mixture particles, and then an adhesive is sprayed on the resulting product to obtain an organic fertilizer containing humic acid.

7. The method for preparing an organic fertilizer containing humic acid according to claim 5, characterized in that: The anaerobic fermentation time in step (1) is 5 to 6 days.

8. The method for preparing an organic fertilizer containing humic acid according to claim 5, characterized in that: After the anaerobic fermentation in step (1) is completed, it also includes; Drying the product obtained after anaerobic fermentation to obtain a first product; The drying temperature is 50-60°C.

9. Use of the humic acid-containing organic fertilizer according to any one of claims 1 to 5 in crop growth.