Microbial agent for soil improvement and preparation method thereof

Abstract

The invention relates to the technical field of soil improvement, and provides a microbial agent for soil improvement and a preparation method thereof. The microbial agent for soil improvement is prepared from the following components in parts by mass: 30 to 50 parts of modified montmorillonite, 10 to 20 parts of zeolite powder, 10 to 15 parts of peat, 10 to 15 parts of animal waste, 10 to 16 parts of complex microbial inoculants and 10 to 15 parts of super absorbent resin, and a modifier of the modified montmorillonite is a chemical substance containing phosphate radicals. According to the technical scheme, the problem that the soil porosity improving effect of a microbial agent for soil improvement in the related technology is poor is solved.

Description

Technical Field

[0001] This invention relates to the field of soil improvement technology, specifically to a microbial agent for soil improvement and its preparation method. Background Technology

[0002] Soil compaction refers to the phenomenon where soil that was originally loose and permeable becomes compacted and hardened on the surface due to improper management and natural factors, resulting in the destruction of its structure. This phenomenon not only affects the soil's aeration and water permeability but can also hinder crop emergence, thereby impacting crop yield and quality. Therefore, improving soil compaction is a crucial issue in soil improvement, and the rational use of soil-improving microbial agents is an effective way to address it. However, currently available soil-improving microbial agents have very limited effects on increasing soil porosity; therefore, there is an urgent need for a soil-improving microbial agent with a superior porosity-enhancing effect. Summary of the Invention

[0003] This invention proposes a microbial agent for soil improvement and its preparation method, which solves the problem that microbial agents for soil improvement have poor effects on increasing soil porosity in related technologies.

[0004] The technical solution of the present invention is as follows: This invention proposes a microbial agent for soil improvement, comprising the following components in parts by weight: 30-50 parts modified montmorillonite, 10-20 parts zeolite powder, 10-15 parts peat, 10-15 parts animal manure, 10-16 parts compound microbial agent, and 10-15 parts superabsorbent resin. The modifier of the modified montmorillonite is a chemical substance containing phosphate.

[0005] As a further technical solution, the phosphate-containing chemical substance includes a first phosphate-containing chemical substance and a second phosphate-containing chemical substance in a mass ratio of 1:9 to 9:1, wherein the first phosphate-containing chemical substance is potassium phosphate and the second phosphate-containing chemical substance is sodium phosphate enol pyruvate.

[0006] This invention further improves soil porosity by specifying potassium phosphate and sodium phosphate enol pyruvate as the modifiers for modified montmorillonite.

[0007] As a further technical solution, the mass ratio of the first phosphate-containing chemical substance and the second phosphate-containing chemical substance is 1:3 to 3:1.

[0008] The present invention further improves soil porosity by limiting the mass ratio of the first phosphate-containing chemical substance to the second phosphate-containing chemical substance to 1:3 to 3:1.

[0009] As a further technical solution, the mass ratio of the modifier to montmorillonite in the modified montmorillonite is 1~5:50.

[0010] As a further technical solution, the animal feces include one or more of chicken feces, duck feces, and pig feces.

[0011] As a further technical solution, the superabsorbent resin is polyacrylate.

[0012] As a further technical solution, the polyacrylate includes one or both of sodium polyacrylate and potassium polyacrylate.

[0013] As a further technical solution, the compound microbial agent includes Bacillus vesiculosus powder, silicate bacteria powder, Bacillus subtilis powder and phosphate-solubilizing bacteria powder in a mass ratio of 1:1:1:1.

[0014] As a further technical solution, the preparation method of the compound microbial agent includes the following steps: Mix Bacillus vesiculosus powder, silicate bacteria powder, Bacillus subtilis powder, and phosphate-solubilizing bacteria powder evenly to obtain a compound bacterial agent.

[0015] As a further technical solution, the preparation method of the modified montmorillonite includes the following steps: The modifier was dissolved in water, montmorillonite was added and mixed evenly, filtered, and dried to obtain modified montmorillonite.

[0016] This invention proposes a method for preparing a microbial inoculant for soil amendment, characterized by comprising the following steps: Modified montmorillonite, zeolite powder, peat, animal manure, compound microbial agent, and superabsorbent resin are mixed evenly to obtain a microbial agent for soil improvement.

[0017] The working principle and beneficial effects of this invention are as follows: In this invention, montmorillonite is modified using a chemical substance containing phosphate. By utilizing the coordination effect between the hydroxyl groups and phosphate groups of montmorillonite, more anions are introduced into the montmorillonite. This increases the internal specific surface area by increasing the attraction imbalance between cations and anions, making it easier for water molecules to enter the mineral interlayer. This increases the water absorption and swelling capacity of the modified montmorillonite, thereby improving the soil porosity. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] The parameters of the raw materials used in the following examples and comparative examples are as follows: The particle size of montmorillonite is 800 mesh; Zeolite powder: NaY synthetic zeolite, bulk density 0.3 g / mL, relative crystallinity 90%, cell constant 24.64 μm, SiO2 / Al2O3 ratio 5.0, specific surface area 650 m² 2 The particles, with a D50 particle size of 5.2 μm and a pore volume of 0.36 mL / g, were purchased from Zibo Runxin Chemical Technology Co., Ltd. Bacillus vesiculosus powder: 100 billion CFU / g of effective live bacteria; Silicate bacterial powder: 10 billion CFU / g of effective live bacteria; Bacillus subtilis powder: 100 billion CFU / g of effective live bacteria; Phosphate-solubilizing bacteria powder: 20 billion CFU / g of effective live bacteria; Potassium polyacrylate: weight average molecular weight of 10 million; Sodium polyacrylate: weight average molecular weight is 10 million.

[0020] Example 1 A microbial agent for soil amendment, the preparation method of which includes the following steps: S1. Dissolve 5 parts of potassium phosphate in 200 parts of water, add 50 parts of montmorillonite, mix well, filter, and dry to obtain modified montmorillonite; S2. Mix 2.5 parts of Bacillus vesiculosus powder, 2.5 parts of silicate bacteria powder, 2.5 parts of Bacillus subtilis powder and 2.5 parts of phosphate-solubilizing bacteria powder evenly to obtain a compound bacterial agent; S3. Mix 30 parts of modified montmorillonite, 10 parts of zeolite powder, 10 parts of peat, 5 parts of chicken manure, 5 parts of duck manure, 10 parts of compound microbial agent, 5 parts of potassium polyacrylate, and 5 parts of sodium polyacrylate evenly to obtain a microbial agent for soil improvement.

[0021] Example 2 A microbial agent for soil amendment, the preparation method of which includes the following steps: S1. Dissolve 1 part of potassium phosphate in 200 parts of water, add 50 parts of montmorillonite, mix well, filter, and dry to obtain modified montmorillonite; S2. Mix 4 parts of Bacillus vesiculosus powder, 4 parts of silicate bacteria powder, 4 parts of Bacillus subtilis powder and 4 parts of phosphate-solubilizing bacteria powder evenly to obtain a compound bacterial agent; S3. Mix 50 parts of modified montmorillonite, 20 parts of zeolite powder, 15 parts of peat, 5 parts of chicken manure, 5 parts of duck manure, 5 parts of pig manure, 16 parts of compound microbial agent, 5 parts of potassium polyacrylate, and 10 parts of sodium polyacrylate evenly to obtain a microbial agent for soil improvement.

[0022] Example 3 A microbial agent for soil amendment, the preparation method of which includes the following steps: S1. Dissolve 0.5 parts of potassium phosphate and 4.5 parts of sodium phosphoenolpyruvate in 200 parts of water, add 50 parts of montmorillonite, mix well, filter, and dry to obtain modified montmorillonite. S2. Mix 2.5 parts of Bacillus vesiculosus powder, 2.5 parts of silicate bacteria powder, 2.5 parts of Bacillus subtilis powder and 2.5 parts of phosphate-solubilizing bacteria powder evenly to obtain a compound bacterial agent; S3. Mix 30 parts of modified montmorillonite, 10 parts of zeolite powder, 10 parts of peat, 5 parts of chicken manure, 5 parts of duck manure, 10 parts of compound microbial agent, 5 parts of potassium polyacrylate, and 5 parts of sodium polyacrylate evenly to obtain a microbial agent for soil improvement.

[0023] Example 4 The only difference from Example 1 is that potassium phosphate is replaced with an equal amount of sodium phosphoenolpyruvate.

[0024] Example 5 The only difference from Example 3 is that: 4.5 parts potassium phosphate and 0.5 parts sodium phosphoenolpyruvate.

[0025] Example 6 The only difference from Example 3 is that: 1.25 parts potassium phosphate and 3.75 parts sodium phosphoenolpyruvate.

[0026] Example 7 The only difference from Example 3 is that: 3.75 parts potassium phosphate and 1.25 parts sodium phosphoenolpyruvate.

[0027] Comparative Example 1 A microbial agent for soil amendment, the preparation method of which includes the following steps: S1. Mix 2.5 parts of Bacillus vesiculosus powder, 2.5 parts of silicate bacteria powder, 2.5 parts of Bacillus subtilis powder and 2.5 parts of phosphate-solubilizing bacteria powder evenly to obtain a compound bacterial agent; S2. Mix 30 parts montmorillonite, 10 parts zeolite powder, 10 parts peat, 5 parts chicken manure, 5 parts duck manure, 10 parts compound microbial agent, 5 parts potassium polyacrylate, and 5 parts sodium polyacrylate evenly to obtain a soil amendment microbial agent.

[0028] Test case The soil improvement microbial agents prepared in Examples 1-7 and Comparative Example 1 were applied at a rate of 60 kg / mu to the soil. After 10 days, the total porosity of the soil before and after improvement was measured using the ring cutter method. The growth rate of total soil porosity is calculated using the following formula: Growth rate (%) = (Total porosity of improved soil - Total porosity of unimproved soil) ÷ Total porosity of unimproved soil × 100; The results are shown in Table 1.

[0029] Table 1. Results of soil amendment microbial agents used in Examples 1-7 and Comparative Example 1 on the improvement of total soil porosity.

[0030] Compared with Comparative Example 1, montmorillonite modified with phosphate-containing chemicals was added in Examples 1 and 3-7. As a result, the soil amendment microbial agents prepared in Examples 1 and 3-7 improved the total porosity of the soil to a greater extent than those in Comparative Example 1, indicating that montmorillonite improved soil porosity after being modified with phosphate-containing chemicals.

[0031] The soil amendment microbial agents prepared in Examples 3 and 5-7 improved the total porosity of the soil to a greater extent than those in Examples 1 and 4. This indicates that the combination of the first phosphate-containing chemical substance and the second phosphate-containing chemical substance, and the limitation that the first phosphate-containing chemical substance is potassium phosphate and the second phosphate-containing chemical substance is sodium phosphate-enol pyruvate, further improved the soil porosity.

[0032] The soil amendment microbial agents prepared in Examples 6 and 7 improved the total porosity of the soil to a greater extent than those in Examples 3 and 5, indicating that by limiting the mass ratio of potassium phosphate to sodium phosphate enol pyruvate to 1:3 to 3:1, the soil porosity was further improved.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A microbial agent for soil improvement, characterized in that: The invention comprises the following components in parts by weight: 30-50 parts of modified montmorillonite, 10-20 parts of zeolite powder, 10-15 parts of peat, 10-15 parts of animal feces, 10-16 parts of composite bacterial agent and 10-15 parts of highly absorbent resin. The modifier of the modified montmorillonite is a chemical substance containing phosphate.

2. A soil improvement microbial agent according to claim 1, characterized in that: The phosphate-containing chemical substance comprises a first phosphate-containing chemical substance and a second phosphate-containing chemical substance in a mass ratio of 1:9 to 9:1, the first phosphate-containing chemical substance is potassium phosphate, and the second phosphate-containing chemical substance is sodium phosphoenolpyruvate.

3. A soil improvement microbial agent according to claim 2, characterized in that: The mass ratio of the first chemical substance containing phosphate to the second chemical substance containing phosphate is 1:3-3:

1.

4. The microbial agent for soil improvement according to claim 1, characterized in that: The mass ratio of the modifier to the montmorillonite in the modified montmorillonite is 1-5:

50.

5. The soil improving microbial agent according to claim 1, characterized in that: The highly water-absorbent resin is polyacrylate.

6. A soil improvement microbial agent according to claim 5, characterized in that: The polyacrylate includes one or both of sodium polyacrylate and potassium polyacrylate.

7. The soil improving microbial agent according to claim 1, characterized in that: The composite bacterial agent comprises Bacillus velez powder, silicate bacteria powder, Bacillus subtilis powder and phosphate-solubilizing bacteria powder in a mass ratio of 1:1:1:

1.

8. The soil improving microbial agent according to any one of claims 1 to 7, characterized in that: The preparation method of the composite bacterial agent comprises the following steps: The Bacillus Velez powder, silicate bacteria powder, Bacillus subtilis powder and phosphate-solubilizing bacteria powder are uniformly mixed to obtain a composite bacterial agent.

9. A soil improving microbial agent according to any one of claims 1 to 8, characterized in that: The preparation method of the modified montmorillonite comprises the following steps: The modifier is dissolved in water, montmorillonite is added and mixed evenly, filtered, and dried to obtain the modified montmorillonite.

10. The method for preparing a soil improving microbial agent according to any one of claims 1 to 9, characterized in that: The following steps are involved: The modified montmorillonite, zeolite powder, peat, animal excrement, composite bacterial agent and highly absorbent resin are uniformly mixed to obtain a microbial agent for soil improvement.

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