Micro-nano organic fertilizer production and preparation method

Abstract

A production and preparation method of a micro-nano organic fertilizer belongs to the field of nano manufacturing technology extension and the technical field of bio-organic fertilizers, and comprises the following steps: S1, carrying out graded crushing and drying on straw and leaf dry materials, residual wood and branch dry materials, carbohydrate organic matters and cattle and sheep manure, mixing, adding compound bacteria and modified humic acid, and fermenting to obtain a micro-nano organic fermentation material precursor; s2, crushing the mineral substance mixture to obtain mineral substance composite particle powder, and adding water for sanding to obtain mineral substance precursor slurry; s3, heating the micro-nano organic fermentation material precursor to sterilize and remove worm eggs; and S4, adding enzyme bacteria into the sterilized micro-nano organic fermentation material precursor, uniformly stirring, adding the mineral precursor slurry, and mixing to obtain the micro-nano organic fertilizer. According to the micro-nano organic fertilizer prepared by the preparation method disclosed by the invention, the absorption of crops on nutritional ingredients is promoted by utilizing the synergistic effect between the nano zero-valent iron and the enzyme microorganisms, so that the growth and the yield of the crops are promoted.

Description

Technical Field

[0001] This invention belongs to the dual fields of extended application of nanotechnology and bio-organic fertilizer technology, specifically involving a method for producing and preparing micro-nano organic fertilizer. Background Technology

[0002] Resetting the soil decomposition mechanism utilizes micro-nano bio-organic fertilizer to enable plants to rapidly decompose, transform, and absorb the nutrients they need, improving the soil and providing crops with a comprehensive nutrient profile. Over fifty years of continuous application of inorganic nitrogen fertilizers and widespread use of herbicides in Chinese agriculture has resulted in soil compaction, poor aeration, restricted oxidation activity, a harsh environment for microbial survival, and low microbial efficiency. This has led to weak yields, bland vegetables, unsweetened fruits, tasteless grains, and a severe decline in the quality of medicinal herbs.

[0003] Organic fertilizers use organic matter as the main component. They can improve soil structure, balance water, fertilizer, air, and heat in the soil, and enhance soil fertility and land productivity, thus becoming increasingly popular.

[0004] Throughout history, all organic fertilizers have relied on natural weathering and oxidation, with microorganisms and enzymes naturally decomposing particulate matter. The transformation and absorption cycle by plants takes several years to hundreds of years. Even with the cultivation of microbial strains to increase the decomposition of particulate minerals in the soil, the cycle still takes several years or thousands of years. Especially with the widespread use of herbicides, the vitality of these microorganisms is severely damaged, and the conflict between herbicides and pesticides and the interaction between enzymes and microorganisms remains unresolved. Modern agricultural technology has not solved the problem of enabling crops to efficiently convert and absorb organic fertilizers, nor has it addressed the comprehensive natural nutrient allocation for grains, vegetables, fruits, and medicinal herbs, thus failing to fundamentally guarantee the quality of agricultural products.

[0005] Therefore, the problem to be solved is to produce bio-organic fertilizer that can improve the activity and decomposition efficiency of microorganisms while ensuring their activity, thereby improving the soil and providing sufficient natural nutrients for crop growth and metabolism. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] Following the principles of plant growth and the natural laws of material decomposition, a nano-processing method is established to reset the natural decomposition mechanism of fertilizers applied to the soil. This shortens the long decomposition cycle of naturally decomposed fertilizers, enabling more and faster conversion of these substances into fully absorbed nutrients by plants. This provides crops with a large amount of carbon, carbohydrates, proteins, cellulose, lignin, and sufficient macro- and micro-elements such as nitrogen, phosphorus, and potassium, thus achieving increased yields and ensuring the quality of agricultural products.

[0008] To address the shortcomings of existing organic fertilizer production technologies in achieving timely and efficient decomposition, transformation, and absorption of bio-fertilizers, as well as deficiencies and inadequacies in the micronutrient configuration, this invention provides a micro-nano organic fertilizer production process and nutrient configuration scheme. This approach meets the needs of crop growth mechanisms for increased yield and harvest, comprehensive nutrient supply, rapid and continuous decomposition, transformation, and absorption, and improved suitable growth environment.

[0009] (III) Technical Solution

[0010] To achieve the above objectives, the present invention provides the following technical solution:

[0011] A method for producing micro / nano organic fertilizer includes the following steps:

[0012] S1: Preparation of micro-nano organic fermentation material precursor: Mix compound bacteria and water at a weight ratio of 1:50 to obtain diluted bacterial solution. Coarsely decompose straw, leaves, and branches to obtain coarsely chopped material. The coarsely chopped straw and leaves should be ≤5cm, and the coarsely chopped branches should be ≤5cm with a diameter ≤3mm. Perform infinitesimal pulverization on sugary organic matter and mix it with the coarsely chopped straw and branches. Add water at a solid-liquid volume ratio of 4:6 and put it into a wall-breaking machine for rotary slurry pulverization to obtain fine slurry. Take 50% of it and put it into a sand mill for wet micro-nano degranulation to obtain micro-nano bio-organic material. Mix this slurry with the 50% finely chopped slurry that has not undergone micro-nano degranulation to obtain micro-nano bio-organic fertilizer precursor 1. Perform infinitesimal pulverization on cow and sheep manure to obtain micro-nano bio-organic fertilizer precursor 2. Mix precursor 1 and 2 and add diluted bacterial solution and modified humic acid to ferment in a tank to obtain micro-nano organic fermentation material precursor.

[0013] S2: Mineral precursor slurry preparation: The mineral mixture is crushed to obtain mineral composite fine powder, and then water is added and fed into a sand mill at a solid-liquid volume ratio of 35:65 for micro-nano degranulation to obtain micro-nano mineral precursor slurry.

[0014] S3: Micro-nano organic fermentation material precursor deharmonization treatment: Sterilize and remove insect eggs by heating the fermented precursor biomass slurry at 70-75℃ for 30-35 minutes.

[0015] S4: Add the detoxified micro-nano organic fermentation material precursor to the enzyme bacteria and stir evenly. Then add the mineral precursor slurry and mix to obtain micro-nano organic fertilizer.

[0016] Furthermore, the preparation method of the modified humic acid includes the following steps:

[0017] Q1: Dissolve 5-6g of ferrous sulfate heptahydrate solution in 100ml of ethanol aqueous solution, then add 2g of starch and stir for 15-20min to obtain ferrous sulfate dispersion. Add 100ml of 0.2mol / L sodium borohydride solution dropwise to the ferrous sulfate dispersion and continue stirring for 30-40min. Select nano-zero valent iron by magnetic separation, and then wash three times each with deionized water and anhydrous ethanol to obtain nano-zero valent iron.

[0018] Q2: Dissolve 8-10g of polyvinyl alcohol in 100-150ml of water, then add 1-2g of sodium alginate and mix well to obtain a sodium alginate mixture.

[0019] Q3: Take 10-15g of nano zero-valent iron and add it to 1L of sodium alginate mixture. Then, in 1L of 1% calcium chloride solution, crosslink at 20℃ for 6h. Then, add 20-25g of basic humic acid and mix completely to obtain modified humic acid.

[0020] Furthermore, the mass ratio of the organic fermentation precursor to the complex bacteria is (8-9):

[0021] (0.01-0.03).

[0022] Furthermore, the compound bacteria are a mixture of Bacillus subtilis and yeast in a mass ratio of 3:2.

[0023] Furthermore, by weight, the micro-nano organic fertilizer comprises 40-50 parts organic fermentation material, 1-2 parts enzyme bacteria, 20-30 parts mineral composite microparticle powder, 1-3 parts modified humic acid, and 20-25 parts water.

[0024] Furthermore, the particle size of the micro-nano organic fermentation precursor is 0.1-450 μm, wherein the particle size distribution of 0.1-50 μm is ≥50%.

[0025] Furthermore, the mineral mixture is a mixture of phosphate ore, potassium feldspar, and lignite in a mass ratio of 5:3:1.

[0026] Furthermore, the mineral mixture has a particle size of 150–300 μm, the mineral composite fine powder has a particle size distribution of 60–125 μm, and the mineral precursor slurry has a particle size of 0.1–9 μm.

[0027] Furthermore, the mass ratio of straw and leaf dry materials, sugar plant dry materials, residual wood branches and trunks and cow and sheep manure in the micro-nano organic fermentation material precursor is 3:1:2:1.

[0028] Furthermore, the sugar-based dried material is any one of corn cob, soybean meal, and sugarcane residue dried material.

[0029] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0030] 1. Micro-nano organic matter and minerals applied to the soil, under the action of natural decomposition and enzyme microbial decomposition, reduce the undecomposed particulate matter residue by ≥60% compared with traditional farmyard manure. Micro-nano organic fertilizers are rapidly decomposed and have a slow-release decomposition effect. ≥60% of various elements and mineral elements of micro-nano biomass are decomposed and transformed in the soil in the same season, and the plant absorption rate is ≥35%.

[0031] 2. Nano-zero-valent iron possesses a high specific surface area and high reactivity, enabling it to undergo a reduction reaction with organic matter in humic acid. In the soil environment, nano-zero-valent iron can reduce complex organic matter in humic acid into simpler organic compounds, facilitating further decomposition of nutrients by enzyme-producing bacteria and thus providing the necessary nutrients for plants. Furthermore, these enzyme-producing bacteria can secrete various enzymes that can decompose complex organic matter in organic fermentation materials, releasing nutrients that plants can absorb.

[0032] 3. The nano-zero-valent iron of this invention can reduce the redox potential of the soil, creating an environment conducive to the growth of enzyme bacteria. In addition, the iron ions generated by the nano-zero-valent iron in the reduction reaction can act as electron donors to promote the metabolic activities of enzyme bacteria, increase their activity, produce more enzymes, further increase the decomposition of organic matter, increase the absorption of nutrients by plants, and promote the growth of crops.

[0033] 4. This invention follows the mechanism of plant absorption and decomposition of soil substances, scientifically allocates natural material elements, ensures timely and sufficient supply of nutrients to crops, and provides material support for increased production and bumper harvest. Detailed Implementation

[0034] The technical solutions of this invention will be clearly and completely described below with reference to the embodiments thereof. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0035] In the examples and comparative examples, the basic humic acid used was weathered coal humic acid.

[0036] Example 1

[0037] A micro-nano organic fertilizer, by weight, comprises 45 parts organic fermentation material, 25 parts mineral composite microparticle powder, 2 parts modified humic acid, and 25 parts water.

[0038] The method for preparing the modified humic acid includes the following steps:

[0039] Q1: Dissolve 5.5g of ferrous sulfate heptahydrate solution in 100ml of ethanol aqueous solution, then add 2g of starch and stir for 20min to obtain ferrous sulfate dispersion. Add 100ml of 0.2mol / L sodium borohydride solution dropwise to the ferrous sulfate dispersion and continue stirring for 35min. Select nano-zero valent iron by magnetic separation, and then wash three times each with deionized water and anhydrous ethanol to obtain nano-zero valent iron.

[0040] Q2: Dissolve 9g of polyvinyl alcohol in 125ml of water, then add 1.5g of sodium alginate and mix well to obtain a sodium alginate mixture.

[0041] Q3: Take 15g of nano zero-valent iron and add it to 1L of sodium alginate mixture. Then, in 1L of 1% calcium chloride solution, crosslink at 20℃ for 6h. Then, add 23g of basic humic acid and mix completely to obtain modified humic acid.

[0042] The mass ratio of the micro-nano organic fermentation material precursor to the compound bacteria is 8.5:0.02.

[0043] This embodiment describes a method for producing micro / nano organic fertilizer, including the following steps:

[0044] S1: Mix the compound bacteria and water at a weight ratio of 1:25 to obtain a diluted bacterial solution. Coarsely break down the straw, leaves, and branches to obtain coarsely broken-down material. The coarsely broken-down material of straw and leaves should be ≤5cm and the coarsely broken-down material of branches should be ≤5cm with a diameter of ≤3mm. Perform infinitesimal pulverization on sugary organic matter and mix it with the coarsely broken-down material of straw and branches. Add water at a solid-liquid volume ratio of 4:6 and put it into a wall-breaking machine for rotary pulverization to obtain a fine slurry. Put 50% of the fine slurry into a sand mill for wet micro-nano degranulation and mix it with the other 50% of the fine slurry to obtain micro-nano bio-organic fertilizer precursor 1. Perform infinitesimal pulverization on dried cow and sheep manure to obtain micro-nano bio-organic fertilizer precursor 2. After mixing precursor 1 and 2, add the diluted bacterial solution and modified humic acid into a tank for fermentation to obtain micro-nano organic fermentation material precursor.

[0045] S2: Mineral precursor slurry preparation: The mineral mixture is finely crushed to obtain mineral composite fine powder, and then water is added and fed into a sand mill at a solid-liquid volume ratio of 35:65 for wet micro-nano degranulation to obtain mineral precursor slurry.

[0046] S3: Micro-nano organic fermentation material precursor deharmonization treatment: Sterilize and remove insect eggs by heating the fermented precursor biomass slurry at 70℃ for 30 minutes.

[0047] S4: Add the detoxified micro-nano organic fermentation material precursor to the enzyme bacteria and stir evenly. Then add the mineral precursor slurry and mix to obtain micro-nano organic fertilizer.

[0048] The mineral mixture is a mixture of phosphate ore, potassium feldspar, and brown minerals in a mass ratio of 5:4:1.

[0049] The mineral mixture has a particle size of 150–300 μm, the mineral composite fine powder has a particle size of 65–125 μm, and the mineral precursor slurry has a particle size of 0.1–8 μm.

[0050] The compound bacteria are a mixture of Bacillus subtilis and yeast in a mass ratio of 3:2.

[0051] The micro-nano organic fermentation precursor has a particle size of 0.1-450 μm, of which the particle size distribution of 0.1-60 μm is ≥50%.

[0052] The mass ratio of straw and leaf dry materials, sugar plant dry materials, residual wood and branches dry materials, and cow and sheep manure in the micro-nano organic fermentation material precursor is 3:1:2:1.

[0053] The dried sugar plant material is corn cob.

[0054] Example 2

[0055] A micro-nano organic fertilizer, by weight, comprises 40 parts organic fermentation material, 1 part enzyme bacteria, 20 parts mineral composite microparticle powder, 1 part modified humic acid, and 20 parts water.

[0056] The method for preparing the modified humic acid includes the following steps:

[0057] Q1: Dissolve 5g of ferrous sulfate heptahydrate solution in 100ml of ethanol aqueous solution, then add 2g of starch and stir for 15min to obtain ferrous sulfate dispersion. Add 100ml of 0.2mol / L sodium borohydride solution dropwise to the ferrous sulfate dispersion and continue stirring for 30min. Select nano-zero valent iron by magnetic separation, and then wash three times each with deionized water and anhydrous ethanol to obtain nano-zero valent iron.

[0058] Q2: Dissolve 8g of polyvinyl alcohol in 100ml of water, then add 1g of sodium alginate and mix well to obtain a sodium alginate mixture.

[0059] Q3: Take 10g of nano zero-valent iron and add it to 1L of sodium alginate mixture. Then, in 1L of 1% calcium chloride solution, crosslink at 20℃ for 6h. Then, add 20g of basic humic acid and mix completely to obtain modified humic acid.

[0060] The mass ratio of the micro-nano organic fermentation material precursor to the compound bacteria is 8:0.01.

[0061] This embodiment describes a method for producing micro / nano organic fertilizer, including the following steps:

[0062] S1: Mix the compound bacteria and water at a weight ratio of 1:5 to obtain a diluted bacterial solution, which is the precursor for micro-nano organic fermentation material preparation; coarsely decompose the straw, leaves and tree branches to obtain coarsely decomposed material, with the straw and leaves coarsely decomposed to ≤5cm and the tree branches coarsely decomposed to ≤5cm and diameter ≤3mm; infinitesimally grind the sugary organic matter and mix it with the coarsely decomposed straw and tree branches, add water at a solid-liquid volume ratio of 4:6 into the cylinder of a wall-breaking machine, and perform cylindrical slurry fine crushing to obtain finely crushed slurry. Put 50% of the finely crushed slurry into a sand mill for wet micro-nano degranulation; mix it with the 50% finely crushed slurry that has not undergone micro-nano degranulation to obtain micro-nano bio-organic fertilizer precursor 1; infinitely grind cow and sheep manure to obtain micro-nano bio-organic fertilizer precursor 2; after mixing precursor 1 and 2, add the diluted bacterial solution and modified humic acid into a tank for fermentation to obtain micro-nano organic fermentation material precursor;

[0063] S2: Mineral precursor slurry preparation: The mineral mixture is crushed to obtain mineral composite fine powder, and then water is added to it. The mixture is put into a sand mill for wet micro-nano degranulation processing at a solid-liquid volume ratio of 35:65 to obtain micro-nano mineral precursor slurry.

[0064] S3: Micro-nano organic fermentation material precursor deharmony treatment: Sterilize and remove insect eggs by heating the fermented precursor biomass slurry at 75℃ for 35 minutes.

[0065] S4: Add the detoxified micro-nano organic fermentation material precursor to the enzyme bacteria and stir evenly. Then add the mineral precursor slurry and mix to obtain micro-nano organic fertilizer.

[0066] The mineral mixture is a mixture of phosphate ore, potassium feldspar, and lignite in a mass ratio of 5:3:1.

[0067] The mineral mixture has a particle size of 150–300 μm, the mineral composite fine powder has a D50 standard particle size of 60–125 μm, and the mineral precursor slurry has a particle size distribution of 0.1–15 μm.

[0068] The compound bacteria are a mixture of Bacillus subtilis and yeast in a mass ratio of 3:2.

[0069] The micro-nano organic fermentation precursor has a particle size of 0.1-450 μm, of which the particle size distribution of 0.1-60 μm is ≥50%.

[0070] The mass ratio of straw and leaf dry materials, sugar plant dry materials, residual wood and branches dry materials, and cow and sheep manure in the micro-nano organic fermentation material precursor is 3:1:2:1.

[0071] The dried sugar plant material is soybean meal.

[0072] Example 3

[0073] A micro-nano organic fertilizer, by weight, comprises 50 parts organic fermentation material, 2 parts enzyme bacteria, 30 parts mineral composite microparticle powder, 3 parts modified humic acid, and 25 parts water.

[0074] The method for preparing the modified humic acid includes the following steps:

[0075] Q1: Dissolve 6g of ferrous sulfate heptahydrate solution in 100ml of ethanol aqueous solution, then add 2g of starch and stir for 20min to obtain ferrous sulfate dispersion. Add 100ml of 0.2mol / L sodium borohydride solution dropwise to the ferrous sulfate dispersion and continue stirring for 40min. Select nano-zero valent iron by magnetic separation, and then wash three times each with deionized water and anhydrous ethanol to obtain nano-zero valent iron.

[0076] Q2: Dissolve 10g of polyvinyl alcohol in 150ml of water, then add 2g of sodium alginate and mix well to obtain a sodium alginate mixture.

[0077] Q3: Take 15g of nano zero-valent iron and add it to 1L of sodium alginate mixture. Then, in 1L of 1% calcium chloride solution, crosslink at 20℃ for 6h. Then, add 25g of basic humic acid and mix completely to obtain modified humic acid.

[0078] The mass ratio of the micro-nano organic fermentation material precursor to the compound bacteria is 9:0.03.

[0079] This embodiment describes a method for producing micro / nano organic fertilizer, including the following steps:

[0080] S1: Mix the compound bacteria and water at a weight ratio of 1:50 to obtain a diluted bacterial solution. Coarsely break down the straw, leaves, and branches to obtain coarsely broken down material. The coarsely broken down straw and leaves should be ≤5cm, and the coarsely broken down branches should be ≤5cm with a diameter of ≤3mm. Add sugary organic matter through infinitesimal pulverization and mix it with the coarsely broken down straw and branches into the cylinder of a wall-breaking machine. Add the coarsely broken down material at a solid-liquid volume ratio of 4:6 to obtain a fine slurry. Put 50% of the finely broken slurry into a sand mill for wet micro-nano degranulation to obtain micro-nano organic slurry. Mix it with the 50% finely broken slurry that has not undergone micro-nano degranulation to obtain micro-nano bio-organic fertilizer precursor 1. Add cow and sheep manure through infinitesimal pulverization to obtain micro-nano bio-organic fertilizer precursor 2. After mixing organic precursor 1 and 2, add the diluted bacterial solution and modified humic acid into a tank for fermentation to obtain micro-nano organic fermentation material precursor.

[0081] S2: Mineral precursor slurry preparation: The mineral mixture is crushed to obtain mineral composite fine powder, and then water is added to it. The mixture is put into a sand mill for wet micro-nano degranulation processing at a solid-liquid volume ratio of 35:65 to obtain micro-nano mineral mixture slurry.

[0082] S3: Micro-nano organic fermentation material precursor deharmonization treatment: Sterilize and remove insect eggs by heating the fermented precursor biomass slurry at 70℃ for 30 minutes.

[0083] S4: Add the detoxified micro-nano organic fermentation material precursor to the enzyme bacteria and stir evenly. Then add the mineral precursor slurry and mix to obtain micro-nano organic fertilizer.

[0084] The mineral mixture is a mixture of phosphate ore, potassium feldspar, and lignite in a mass ratio of 5:3:1.

[0085] The mineral mixture has a particle size of 150–300 μm, the mineral composite fine powder has a particle size of 65–125 μm, and the mineral precursor slurry has a particle size of 0.1–10 μm.

[0086] The compound bacteria are a mixture of Bacillus subtilis and yeast in a mass ratio of 3:2.

[0087] The micro / nano organic fermentation precursor has a particle size of 0.1-450 μm, of which ≥50% are 1-50 μm in size.

[0088] The mass ratio of straw and leaf dry materials, sugar plant dry materials, residual wood and branches dry materials, and cow and sheep manure in the micro-nano organic fermentation material precursor is 3:1:2:1.

[0089] The sugar plant dry material is sugarcane residue dry material.

[0090] Example 4

[0091] A micro-nano organic fertilizer, by weight, comprises 42 parts organic fermentation material, 22 parts mineral composite microparticle powder, 1.5 parts modified humic acid, and 22 parts water.

[0092] The method for preparing the modified humic acid includes the following steps:

[0093] Q1: Dissolve 5.2g of ferrous sulfate heptahydrate solution in 100ml of ethanol aqueous solution, then add 2g of starch and stir for 16min to obtain ferrous sulfate dispersion. Add 100ml of 0.2mol / L sodium borohydride solution dropwise to the ferrous sulfate dispersion and continue stirring for 33min. Select nano-zero valent iron by magnetic separation, and then wash three times each with deionized water and anhydrous ethanol to obtain nano-zero valent iron.

[0094] Q2: Dissolve 8.5g of polyvinyl alcohol in 110ml of water, then add 1.2g of sodium alginate and mix well to obtain a sodium alginate mixture.

[0095] Q3: Take 12g of nano zero-valent iron and add it to 1L of sodium alginate mixture. Then, in 1L of 1% calcium chloride solution, crosslink at 20℃ for 6h. Then, add 22g of basic humic acid and mix completely to obtain modified humic acid.

[0096] The mass ratio of the micro-nano organic fermentation material precursor to the compound bacteria is 8.2:0.15.

[0097] This embodiment describes a method for producing micro / nano organic fertilizer, including the following steps:

[0098] S1: Mix the compound bacteria and water at a weight ratio of 1:10 to obtain a diluted bacterial solution. Coarsely break down the straw, leaves, and branches to obtain coarsely broken-down material. The straw and leaves are coarsely broken down to 2cm, and the branches are coarsely broken down to 2cm with a diameter of 1mm. The sugary organic matter is continuously pulverized and mixed with the straw and branches coarsely broken-down material. Water is added at a solid-liquid volume ratio of 4:6 and the mixture is put into a wall-breaking machine for rotary pulverization to obtain fine slurry. 50% of the fine slurry is put into a sand mill for micro-nano degranulation. It is mixed with the fine slurry that has not undergone micro-nano degranulation to obtain precursor 1. The dried cow and sheep manure is continuously pulverized to obtain inorganic precursor 2. After mixing precursor 1 and 2, the diluted bacterial solution and modified humic acid are added to the mixture and fermented in a tank to obtain micro-nano organic fermentation material precursor.

[0099] S2: Preparation of mineral precursor slurry: The mineral mixture is crushed to obtain mineral composite fine powder, and then water is added to it. The mixture is put into a sand mill for wet micro-nano degranulation processing at a solid-liquid volume ratio of 35:65 to obtain mineral precursor slurry.

[0100] S3: Micro-nano organic fermentation material precursor deharmony treatment: Sterilize and remove insect eggs by heating the fermented precursor biomass slurry at 72℃ for 32 minutes.

[0101] S4: Add the detoxified micro-nano organic fermentation material precursor to the enzyme bacteria and stir evenly. Then add the mineral precursor slurry and mix to obtain micro-nano organic fertilizer.

[0102] The solid-liquid volume ratio of the micro-nano organic fertilizer is 30:70.

[0103] The mineral mixture is a mixture of phosphate ore, potassium feldspar, and lignite in a mass ratio of 5:3:1.

[0104] The mineral mixture particles are 150-300 μm in size, the mineral composite fine powder particles are 60-125 μm in size, and the mineral precursor slurry particles are 0.1-15 μm in size.

[0105] The compound bacteria are a mixture of Bacillus subtilis and yeast in a mass ratio of 3:2.

[0106] The micro-nano organic fermentation precursor has a particle size of 0.1-450 μm, of which ≥50% are 10-90 μm in size.

[0107] The mass ratio of straw and leaf dry materials, sugar plant dry materials, residual wood and branches dry materials, and cow and sheep manure in the micro-nano organic fermentation material precursor is 3:1:2:1.

[0108] The dried sugar plant material is corn cob.

[0109] Example 5

[0110] A micro-nano organic fertilizer, by weight, comprises 48 parts organic fermentation material, 1.8 parts enzyme bacteria, 28 parts mineral composite microparticle powder, 2.5 parts modified humic acid, and 24 parts water.

[0111] The method for preparing the modified humic acid includes the following steps:

[0112] Q1: Dissolve 5.8g of ferrous sulfate heptahydrate solution in 100ml of ethanol aqueous solution, then add 2g of starch and stir for 19min to obtain ferrous sulfate dispersion. Add 100ml of 0.2mol / L sodium borohydride solution dropwise to the ferrous sulfate dispersion and continue stirring for 37min. Select nano-zero valent iron by magnetic separation, and then wash three times each with deionized water and anhydrous ethanol to obtain nano-zero valent iron.

[0113] Q2: Dissolve 9.5g of polyvinyl alcohol in 1450ml of water, then add 1.82g of sodium alginate and mix well to obtain a sodium alginate mixture.

[0114] Q3: Take 14g of nano zero-valent iron and add it to 1L of sodium alginate mixture. Then, in 1L of 1% calcium chloride solution, crosslink at 20℃ for 6h. Then, add 24g of basic humic acid and mix completely to obtain modified humic acid.

[0115] The mass ratio of the micro-nano organic fermentation material precursor to the composite bacteria is 8.8:0.25.

[0116] This embodiment describes a method for producing micro / nano organic fertilizer, including the following steps:

[0117] S1: Mix the compound bacteria with water at a weight ratio of 1:45 to obtain a diluted bacterial solution. Coarsely break down the straw, leaves, and branches to obtain coarsely broken material. The coarsely broken straw and leaves should be ≤4cm, and the coarsely broken branches should be ≤4cm with a diameter of ≤2.5mm. Perform stepless grinding of sugary organic matter and mix it with the straw and branches coarsely broken material. Add water at a solid-liquid volume ratio of 4:6 and put it into a wall-breaking machine for blade grinding to obtain a fine slurry. Take 50% of the fine slurry and put it into a sand mill for micro-nano degranulation to obtain micro-nano organic slurry. Mix it with the fine slurry that has not undergone micro-nano degranulation to obtain micro-nano organic precursor 1. Perform stepless grinding of dried cow and sheep manure to obtain organic precursor 2. After mixing organic precursor 1 and 2, add the diluted bacterial solution and modified humic acid into a tank for fermentation to obtain micro-nano organic fermentation material precursor.

[0118] S2: Preparation of mineral precursor slurry: The mineral mixture is crushed to obtain mineral composite fine powder, and then water is added to it. The mixture is put into a sand mill for wet micro-nano degranulation processing at a solid-liquid volume ratio of 35:65 to obtain mineral precursor slurry.

[0119] S3: Micro-nano organic fermentation material precursor deharmonization treatment: Sterilize and remove insect eggs by heating the fermented precursor biomass slurry at 74℃ for 34 minutes.

[0120] S4: Add the detoxified micro-nano organic fermentation material precursor to the enzyme bacteria and stir evenly. Then add the mineral precursor slurry and mix to obtain micro-nano organic fertilizer.

[0121] The solid-liquid volume ratio of the micro-nano organic fertilizer is 30:70.

[0122] The particle size of the micro-nano organic fermentation precursor is 0.1-450 μm, of which ≥50% are 10-90 μm in diameter.

[0123] The mineral mixture is a mixture of phosphate ore, potassium feldspar, and lignite in a mass ratio of 5:3:1.

[0124] The mineral mixture particles are 150-300 μm in size, the mineral composite microparticles are 60-125 μm in size, and the mineral precursor slurry particles are 1-10 μm in size.

[0125] The compound bacteria are a mixture of Bacillus subtilis and yeast in a mass ratio of 3:2.

[0126] The mass ratio of dried straw and leaves, dried sugar plants, and dried wood and branches in the micro-nano organic fermentation precursor is 3:1:2.

[0127] The dried sugar plant material is corn cob.

[0128] Unlike Example 1, Comparative Example 1 did not add enzyme bacteria in the preparation of the micro-nano organic fertilizer.

[0129] The difference between Comparative Example 2 and Example 1 is that no nano-zero-valent iron was added during the preparation of the modified humic acid.

[0130] The difference between Comparative Example 3 and Example 1 is that no enzyme bacteria were added, and no nano-zero valent iron was added during the preparation of modified humic acid.

[0131] The bio-organic fertilizers prepared in the above examples and comparative examples were used on potatoes, and their yield and effects on potato growth were measured.

[0132] The experiment adopted a randomized block design, setting up 8 identical experimental fields. Zhongshu No. 2 was selected, and the plant height and diameter were measured when the seedlings were cultivated. Then, the same amount of fertilizer was applied to each experimental field according to the fertilizer prepared in the example and comparative example. After the potatoes matured, the average plant height and average diameter of each experimental field were measured again.

[0133] Table 1

[0134]

[0135] Based on Examples 1-5 and Table 1, the micro-nano organic fertilizer prepared by the technical solution of this invention can effectively promote the growth of crops such as grains and vegetables, significantly improving the yield and taste quality of apples, green beans, peppers, and potatoes. Apples with a fruit size of 120cm or more have a ≥70% fruit rate and a sweet taste; the fruit cycle of green beans, peppers, and other fruits and vegetables is extended by nearly one month, with a 30% increase in fruit setting rate; the rate of large potatoes is increased by 30%, and the yield is increased by 35-45%.

[0136] Based on the data from Example 1, Comparative Example 1, and Table 1, it can be seen that the addition of enzyme-producing bacteria can promote the absorption of nutrients by potato plants and increase potato yield.

[0137] Based on the data from Example 1, Comparative Example 2, and Table 1, it can be seen that the addition of nano-zero valent iron in the preparation of modified humic acid can promote the absorption of nutrients by potato plants and increase potato yield.

[0138] Based on the data from Example 1, Comparative Example 1, Comparative Example 2, and Comparative Example 3, and Table 1, it can be seen that, firstly, the average plant height, average diameter, and potato yield of the plants in Comparative Example 1, Comparative Example 2, and Comparative Example 3 are all lower than those in Example 1. Furthermore, the decrease in the average plant height, average diameter, and potato yield of the plants in Comparative Example 3 is significantly greater than that of the plants in Comparative Example 1 and Comparative Example 2. This proves that the nano-zero valent iron and enzyme bacteria in the technical solution of this invention can synergistically promote the growth of potato plants and synergistically increase potato yield.

[0139] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for producing and preparing micro-nano organic fertilizer, characterized in that, It comprises the following steps: S1: micro-nano organic fermentation material precursor preparation; the composite bacteria and water are mixed uniformly according to a weight ratio of 1:50 to obtain a diluted bacterial solution, straw leaf dry material, residual wood branch dry material are coarsely dissolved to obtain coarsely dissolved material, the straw leaf is coarsely dissolved to be ≤5 cm, the residual wood branch is coarsely dissolved to be ≤5 cm and the diameter is ≤3 mm, the sugar organic matter and the sheep and goat manure are steplessly crushed and dried; 50% of the coarsely dissolved material is added with water, mixed according to a solid-liquid volume ratio of 4:6 and then crushed to obtain fine crushed slurry, and the other 50% of the coarsely dissolved material is sand-milled to obtain micro-nano dissolved particles; the fine crushed slurry and the micro-nano dissolved particles and the dried and crushed sheep and goat manure sugar organic matter are mixed, then the diluted bacterial solution and the modified humic acid are added in a tank for fermentation to obtain the micro-nano organic fermentation material precursor; S2: mineral substance precursor slurry preparation: the mineral substance mixed material is crushed to obtain mineral substance composite particle powder, then water is added and input into a sand mill for micro-nano dissolved particle processing according to a solid-liquid volume ratio of 35:65 to obtain the mineral substance precursor slurry; S3: micro-nano organic fermentation material precursor harm removal treatment: the fermented precursor biomass slurry is heated at 70-75 ℃ for 30-35 min for sterilization and insect egg removal; S4: the micro-nano organic fermentation material precursor after the harm removal is added with enzyme bacteria and stirred uniformly, then the mineral substance precursor slurry is added and mixed for compounding to obtain the micro-nano organic fertilizer.

2. The method according to claim 1, characterized in that, The preparation method of the modified humic acid comprises the following steps: Q1: 5-6 g of ferrous sulfate heptahydrate solution is dissolved in 100 ml of ethanol aqueous solution, then 2 g of starch is added and stirred for 15-20 min to obtain a ferrous sulfate dispersion liquid, 100 ml of 0.2 mol / L sodium borohydride solution is added dropwise into the ferrous sulfate dispersion liquid and continues to be stirred for 30-40 min, nano zero-valent iron is selected by magnetic selection method, then deionized water and anhydrous ethanol are sequentially used for washing three times to obtain the nano zero-valent iron; Q2: 8-10 g of polyvinyl alcohol is dissolved in 100-150 ml of water, then 1-2 g of sodium alginate is added and mixed uniformly to obtain a sodium alginate mixed solution; Q3: 10-15 g of nano zero-valent iron is added into 1 L of the sodium alginate mixed solution, then 1 L of 1% calcium chloride solution is added, crosslinking is carried out at 20 ℃ for 6 h, then 20-25 g of basic humic acid is added and mixed completely to obtain the modified humic acid. The mass ratio of the micro-nano organic fermentation material precursor to the composite bacteria is (8-9):(0.01-0.03).

3. The method according to claim 1, characterized in that, The composite bacteria are mixed bacteria of bacillus subtilis and yeast bacteria according to a mass ratio of 3:

2.

4. The method according to claim 1, characterized in that, The micro-nano organic fertilizer comprises 25-30 parts of organic fermentation material, 1-2 parts of enzyme bacteria, 7-8 parts of mineral substance composite, 1-3 parts of modified humic acid and 60 parts of water in terms of weight.

5. The method for producing micro-nano organic fertilizer according to any one of claims 1-4, characterized in that: The particle size of the micro-nano organic fermentation material precursor is 0.1-450 um, and the particle size distribution of 0.1-50 um is ≥50%.

6. The method according to claim 1, characterized in that: The mineral substance mixed material is a mixture of phosphate ore, potassium feldspar and lignite according to a mass ratio of 5:3:

1.

7. The method according to claim 1, characterized in that: ​ 8. The method according to claim 7, characterized in that: The mineral mixture particle size is 40-80 mesh, the mineral composite microparticle powder particle size is <= 70 mu m, and the mineral precursor slurry particle size is 0.1-9 mu m.

9. The method according to claim 6, characterized in that: The mass ratio of the straw leaf dry material, the sugar plant dry material, the residual wood branch dry material and the cow and sheep manure in the micro-nano organic fermentation material precursor is 3:1:2:

1.

10. The method according to claim 9, characterized in that: The sugar plant dry material is any one of corn cob core, soybean meal and sugar residue dry material.

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