Microbial compound fertilizer for improving soil hardening as well as preparation method and application of microbial compound fertilizer

Abstract

The invention discloses a microbial compound fertilizer for improving soil hardening as well as a preparation method and application thereof, and belongs to the technical field of compound fertilizers. The microbial compound fertilizer for improving soil hardening provided by the invention is prepared from the following raw materials in parts by weight: 40 to 70 parts of ternary inorganic compound fertilizer, 10 to 25 parts of microbial compound bacterial powder, 12 to 20 parts of organic matter and 5 to 15 parts of biological active agent, the microbial compound bacterial powder is prepared by mixing bacillus subtilis bacterial powder, bacillus licheniformis bacterial powder, bacillus megaterium bacterial powder, bacillus mucilaginosus bacterial powder, lactic acid bacteria bacterial powder, nitrogen-fixing bacteria bacterial powder and actinomycetes bacterial powder. According to the invention, the ternary inorganic compound fertilizer, the microbial compound bacterial powder, the organic matter and the biological active agent are taken as raw materials, and a plurality of strains with different functions are compounded to prepare the microbial compound bacterial powder, so that the effect of the microbial compound bacterial powder is ensured, the fertilizer absorbing capacity of crops is further improved, and soil hardening is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of compound fertilizers, and in particular relates to a microbial compound fertilizer for improving soil compaction, and a preparation method and application thereof. Background Art

[0002] Soil compaction refers to the phenomenon that the soil surface lacks organic matter and has a poor structure. Under the influence of external factors such as irrigation or rainfall, the soil material is dispersed and the soil surface becomes hard due to cohesion after drying. Soil compaction will reduce the porosity of the soil, affect the permeability of the soil, and reduce the soil's ability to absorb water, oxygen and nutrients, resulting in poor development of crop roots and affecting the yield and quality of crops. Therefore, improving the soil compaction condition is crucial to increasing the yield and quality of crops.

[0003] The existing technology usually adopts the method of applying organic fertilizer and microbial agents to improve soil compaction, but this method has the following problems: first, the organic fertilizer decomposes slowly and the nutrient supply is not timely, which cannot achieve the purpose of increasing soil organic matter; second, the microbial agents cannot grow and reproduce due to the harsh soil environment and cannot fully play their role.

[0004] Therefore, there is an urgent need to provide a microbial compound fertilizer that can effectively increase soil organic matter and fully exert the effect of microbial agents to improve soil compaction in order to solve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a microbial compound fertilizer for improving soil compaction, and a preparation method and application thereof.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a microbial compound fertilizer for improving soil compaction, comprising the following raw materials in parts by weight: 40-70 parts of ternary inorganic compound fertilizer, 10-25 parts of microbial compound powder, 12-20 parts of organic matter and 5-15 parts of bioactive agent;

[0008] The microbial composite powder is prepared by mixing bacillus subtilis powder, bacillus licheniformis powder, bacillus megaterium powder, jelly-like bacillus powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder.

[0009] Preferably, the mass ratio of the Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus jelly powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder is (10-13): (11-14): (12-15): (8-11): (4-9): (5-8): (3-7).

[0010] Preferably, the ternary inorganic compound fertilizer is formed by mixing inorganic nitrogen fertilizer, inorganic phosphorus fertilizer and inorganic potassium fertilizer in a mass ratio of (1-5):(1-5):(3-5).

[0011] Preferably, the organic matter includes humic acid, amino acids, bean curd residues and fruit residues.

[0012] Preferably, the mass ratio of humic acid, amino acid, bean curd residue and fruit residue is (2-4):(2-4):(3-8):(3-8).

[0013] Preferably, the bioactive agent comprises biochar, brown algae oligosaccharide and montmorillonite.

[0014] Preferably, the mass ratio of the biochar, brown algae oligosaccharide and montmorillonite is (3-7):(5-10):(2-5).

[0015] The present invention provides a method for preparing the microbial compound fertilizer for improving soil compaction as described in the above technical solution, characterized in that it comprises the following steps:

[0016] The microbial composite powder and the bioactive agent are mixed evenly, and then the ternary inorganic composite fertilizer and the organic matter are added and mixed evenly, and the microbial composite fertilizer for improving soil compaction is obtained through granulation.

[0017] The present invention also provides the use of the microbial compound fertilizer for improving soil compaction described in the above technical solution in improving soil compaction.

[0018] Preferably, the application amount of the microbial compound fertilizer for improving soil compaction is 40-80 kg / mu.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] The invention uses ternary inorganic compound fertilizer, microbial compound powder, organic matter and bioactive agent as raw materials, and prepares the microbial compound powder by compounding a plurality of strains with different functions, thereby avoiding the phenomenon of competition and rejection among strains and enabling each strain to give full play to its unique efficacy. The ternary inorganic compound fertilizer can provide carbon source and nitrogen source for microorganisms, thereby prompting the microorganisms to give full play to their functions, improving the fertilizer absorption capacity of crops and reducing the degree of soil compaction; the organic matter can increase the organic matter content in the soil, improve the soil structure, promote the activity of microorganisms and enable them to give full play to their functions; the bioactive agent can provide additional nutrition and environmental conditions for the strains in the microbial compound powder, thereby ensuring the effect and stability of the microbial compound powder.

[0021] The present invention adopts ternary inorganic compound fertilizer, organic matter and bioactive agent in combination with microbial compound powder, thereby ensuring the effect of the microbial compound powder, thereby improving the fertilizer absorption capacity of crops and improving soil compaction.

[0022] The microbial compound fertilizer for improving soil compaction provided by the present invention can increase soil organic matter, improve soil nutrient utilization rate, and improve soil compaction. DETAILED DESCRIPTION

[0023] 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.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with specific implementation methods.

[0025] The embodiment of the present invention provides a microbial compound fertilizer for improving soil compaction, comprising the following raw materials in parts by weight: 40-70 parts of ternary inorganic compound fertilizer, 10-25 parts of microbial compound powder, 12-20 parts of organic matter and 5-15 parts of bioactive agent;

[0026] The microbial composite powder is prepared by mixing bacillus subtilis powder, bacillus licheniformis powder, bacillus megaterium powder, jelly-like bacillus powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder.

[0027] In a preferred embodiment, the microbial compound fertilizer for improving soil compaction includes 40-70 parts of ternary inorganic compound fertilizer, preferably 45-60 parts by weight. The ternary inorganic compound fertilizer in the present invention can provide the nutrients needed for the growth of crops on the one hand, and can provide carbon and nitrogen sources for microorganisms on the other hand, so as to enable the microorganisms to fully exert their functions, improve the fertilizer absorption capacity of crops, and reduce the degree of soil compaction.

[0028] In a preferred embodiment, the ternary inorganic compound fertilizer is formed by mixing inorganic nitrogen fertilizer, inorganic phosphorus fertilizer and inorganic potassium fertilizer in a mass ratio of (1-5):(1-5):(3-5).

[0029] In a preferred embodiment, the inorganic nitrogen fertilizer includes one or more of urea, ammonium bicarbonate and ammonium nitrate; the inorganic phosphorus fertilizer includes one or more of potassium phosphate, potassium dihydrogen phosphate, diammonium phosphate, monoammonium phosphate and superphosphate; the inorganic potassium fertilizer includes one or more of potassium chloride, potassium nitrate, potassium sulfate and potassium dihydrogen sulfate.

[0030] In a preferred embodiment, the microbial compound fertilizer for improving soil compaction includes 10-25 parts of microbial compound powder, preferably 15-25 parts by weight. The microbial compound powder in the present invention is used to promote the absorption of inorganic fertilizers by crops, thereby improving soil compaction.

[0031] In a preferred embodiment, the microbial composite powder is a mixture of Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus jelly powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder; the mass ratio of the Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus jelly powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder is (10-13): (11-14): (12-15): (8-11): (4-9): (5-8): (3-7). The present invention compounds a variety of strains with different functions into a microbial composite powder, which not only avoids competition and rejection between strains, but also enables each strain to give full play to its unique efficacy, improve the fertilizer absorption capacity of crops, and reduce the degree of soil compaction.

[0032] In a preferred embodiment, the bacterial count of each bacterial powder in the microbial composite powder is ≥ 2.0×10 9 cfu / g.

[0033] In a preferred embodiment, the microbial compound fertilizer for improving soil compaction includes 12-20 parts of organic matter, preferably 15-18 parts by weight. The use of organic matter in the present invention can increase the organic matter content in the soil, improve the soil structure, promote microbial activity, and make it fully play its role.

[0034] In a preferred embodiment, the organic matter includes humic acid, amino acids, bean curd residue and fruit residue; the mass ratio of humic acid, amino acids, bean curd residue and fruit residue is (2-4):(2-4):(3-8):(3-8), preferably (3-4):(3-4):(4-8):(4-8).

[0035] In a preferred embodiment, the microbial compound fertilizer for improving soil compaction includes 5-15 parts by weight, preferably 8-13 parts by weight of a bioactive agent. The bioactive agent in the present invention can provide additional nutrition and environmental conditions for the strains in the microbial composite bacterial powder, thereby ensuring the effect and stability of the microbial composite bacterial powder.

[0036] In a preferred embodiment, the bioactive agent includes biochar, brown algae oligosaccharide and montmorillonite; the mass ratio of the biochar, brown algae oligosaccharide and montmorillonite is (3-7): (5-10): (2-5), preferably (4-6): (6-9): (3-5).

[0037] The present invention provides a method for preparing the microbial compound fertilizer for improving soil compaction as described in the above technical solution, characterized in that it comprises the following steps:

[0038] The microbial composite powder and the bioactive agent are mixed evenly, and then the ternary inorganic composite fertilizer and the organic matter are added and mixed evenly, and the microbial composite fertilizer for improving soil compaction is obtained through granulation.

[0039] The present invention also provides the use of the microbial compound fertilizer for improving soil compaction described in the above technical solution in improving soil compaction.

[0040] In a preferred embodiment, the application amount of the microbial compound fertilizer for improving soil compaction is 40-80 kg / mu.

[0041] Unless otherwise specified, parts in the embodiments of the present invention represent “parts by weight”.

[0042] In the following examples, Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus jelly powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycetes powder are all common commercial products, and the number of viable bacteria in each of the microbial composite powders is ≥2.0×10 9 cfu / g.

[0043] In the following examples, both the bean curd residue and the fruit residue were decomposed and dried.

[0044] Unless otherwise specified, the raw materials in the examples of the present invention were purchased from commercial sources.

[0045] Example 1

[0046] A microbial compound fertilizer for improving soil compaction, comprising the following raw materials in parts by weight: 40 parts of ternary inorganic compound fertilizer, 15 parts of microbial compound powder, 12 parts of organic matter and 8 parts of bioactive agent;

[0047] Among them, the ternary inorganic compound fertilizer is composed of urea, potassium dihydrogen phosphate and potassium nitrate in a mass ratio of 3:3:5; the microbial composite powder is composed of Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus gelatinous powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder in a mass ratio of 11:11:13:9:5:5:3; the organic matter is composed of humic acid, amino acids, tofu residue and fruit residue in a mass ratio of 2:2:4:6; the bioactive agent is composed of biochar, brown algae oligosaccharide and montmorillonite in a mass ratio of 4:7:3.

[0048] The preparation method of the microbial compound fertilizer for improving soil compaction is as follows:

[0049] The microbial composite powder and the bioactive agent are stirred and mixed evenly, and then the ternary inorganic composite fertilizer and the organic matter are added and stirred continuously. After being mixed evenly, the microbial composite fertilizer for improving soil compaction is obtained by granulation.

[0050] Example 2

[0051] A microbial compound fertilizer for improving soil compaction, comprising the following raw materials in parts by weight: 55 parts of ternary inorganic compound fertilizer, 10 parts of microbial compound powder, 17 parts of organic matter and 10 parts of bioactive agent;

[0052] The ternary inorganic compound fertilizer is composed of ammonium nitrate, monoammonium phosphate and potassium chloride in a mass ratio of 2:2:4; the microbial composite powder is composed of Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus gelatinus powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder in a mass ratio of 10:12:15:8:4:7:6; the organic matter is composed of humic acid, amino acids, tofu residue and fruit residue in a mass ratio of 3:2:5:7; the bioactive agent is composed of biochar, brown algae oligosaccharide and montmorillonite in a mass ratio of 3:8:2;

[0053] The preparation method of the microbial compound fertilizer for improving soil compaction is the same as that in Example 1.

[0054] Example 3

[0055] A microbial compound fertilizer for improving soil compaction, comprising the following raw materials in parts by weight: 48 parts of ternary inorganic compound fertilizer, 21 parts of microbial compound powder, 14 parts of organic matter and 5 parts of bioactive agent;

[0056] The ternary inorganic compound fertilizer is composed of ammonium bicarbonate, potassium phosphate and potassium sulfate in a mass ratio of 4:3:4; the microbial composite powder is composed of Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus gelatinus powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder in a mass ratio of 13:11:14:9:7:6:5; the organic matter is composed of humic acid, amino acids, tofu residue and fruit residue in a mass ratio of 2:2:7:7; the bioactive agent is composed of biochar, brown algae oligosaccharide and montmorillonite in a mass ratio of 6:5:4;

[0057] The preparation method of the microbial compound fertilizer for improving soil compaction is the same as that in Example 1.

[0058] Example 4

[0059] A microbial compound fertilizer for improving soil compaction, comprising the following raw materials in parts by weight: 62 parts of ternary inorganic compound fertilizer, 18 parts of microbial compound powder, 13 parts of organic matter and 15 parts of bioactive agent;

[0060] The ternary inorganic compound fertilizer is composed of urea, superphosphate and potassium nitrate in a mass ratio of 1:3:3; the microbial composite powder is composed of Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus gelatinus powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder in a mass ratio of 10:14:12:11:8:7:6; the organic matter is composed of humic acid, amino acids, tofu residue and fruit residue in a mass ratio of 3:4:7:5; the bioactive agent is composed of biochar, brown algae oligosaccharide and montmorillonite in a mass ratio of 7:10:3;

[0061] The preparation method of the microbial compound fertilizer for improving soil compaction is the same as that in Example 1.

[0062] Example 5

[0063] A microbial compound fertilizer for improving soil compaction, comprising the following raw materials in parts by weight: 70 parts of ternary inorganic compound fertilizer, 25 parts of microbial compound powder, 20 parts of organic matter and 10 parts of bioactive agent;

[0064] The ternary inorganic compound fertilizer is composed of ammonium nitrate, potassium dihydrogen phosphate and potassium nitrate in a mass ratio of 4:3:5; the microbial composite powder is composed of Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus gelatinus powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder in a mass ratio of 13:14:14:11:5:7:7; the organic matter is composed of humic acid, amino acids, tofu residue and fruit residue in a mass ratio of 2:2:6:7; the bioactive agent is composed of biochar, brown algae oligosaccharide and montmorillonite in a mass ratio of 5:8:4;

[0065] The preparation method of the microbial compound fertilizer for improving soil compaction is the same as that in Example 1.

[0066] Comparative Example 1

[0067] The difference from Example 1 is that the microbial composite powder is omitted, and the other aspects are the same.

[0068] Comparative Example 2

[0069] The difference from Example 1 is that the bioactive agent is omitted, and the other aspects are the same.

[0070] Comparative Example 3

[0071] The difference from Example 1 is that the organic matter is omitted, and the other contents are the same.

[0072] Comparative Example 4

[0073] The difference from Example 1 is that the composite microbial powder is prepared by mixing Bacillus subtilis powder, Bacillus licheniformis powder, lactic acid bacteria powder and actinomycetes powder in a mass ratio of 11:11:5:3, and the rest are the same.

[0074] Comparative Example 5

[0075] The difference from Example 1 is that the organic matter is composed of humic acid and pomace in a mass ratio of 2:6, and the other contents are the same.

[0076] Comparative Example 6

[0077] The difference from Example 1 is that the bioactive agent is composed of biochar and brown algae oligosaccharide in a mass ratio of 4:7, and the rest are the same.

[0078] Comparative Example 7

[0079] The difference from Example 1 is that the amount of the composite microbial powder is 30 parts, and the others are the same.

[0080] Comparative Example 8

[0081] The difference from Example 1 is that the amount of the bioactive agent used is 3 parts, and the other parts are the same.

[0082] Field trials

[0083] The experiment was carried out in an experimental field in Daqing City, Heilongjiang Province from 2023 to 2024. The soil type is saline-alkali soil, and the basic physical and chemical properties of the soil are: pH 8.5, organic matter 8.43g / kg, total nitrogen 4.82g / kg, total phosphorus 3.28g / kg, and total potassium 12.06g / kg.

[0084] Corn was selected as the test object and planted in mid-April. The area of ​​each test plot was 5m×5m, and the plots were randomly arranged. Fertilization was carried out at the seedling stage, the large bell stage and the filling stage, and the total fertilizer application rate was 50kg / mu. After the corn matured, the corn yield of each plot was measured, and the results are shown in Table 1.

[0085] Table 1 Effects of different fertilizer treatments on corn yield

[0086] Fertilization type Yield (kg / mu) 100-grain weight (g) Seed yield rate (%) No fertilizer 523 25.33 70.2 Example 1 741 31.93 87.3 Example 2 734 30.12 87.8 Example 3 762 32.77 88.1 Example 4 769 34.06 89.7 Example 5 783 35.47 90.5 Comparative Example 1 611 26.42 78.3 Comparative Example 2 638 27.04 79.2 Comparative Example 3 651 27.84 80.5 Comparative Example 4 672 28.84 81.9 Comparative Example 5 693 29.67 83.3 Comparative Example 6 684 29.01 82.7 Comparative Example 7 702 29.25 84.1 Comparative Example 8 669 28.39 81.5

[0087] As can be seen from Table 1, the application of the microbial compound fertilizer for improving soil compaction provided by the present invention can significantly increase corn yield. Compared with no fertilization, the corn yield is increased by 211-260 kg / mu, and the seed rate is increased by 17.1-20.3%. At the same time, by comparing Example 1 with Comparative Examples 1-6 and Comparative Example 8, it can be seen that changing the composition of the microbial compound fertilizer for improving soil compaction, the amount of the bioactive agent, and the composition of the microbial composite powder, organic matter and the bioactive agent will affect the corn yield and seed rate; by comparing Example 1 with Comparative Example 7, it can be seen that increasing the amount of the microbial composite powder in the microbial compound fertilizer cannot achieve the purpose of further increasing the corn yield and seed rate, indicating that too much microbial composite powder has no positive effect on increasing the yield of corn.

[0088] After corn harvest, 150 g of soil from each plot was randomly weighed and air-dried. The weight of each aggregate component of the soil was tested using a water-stable aggregate analyzer. The mean weight diameter (MWD, calculated as follows) was calculated based on the weight ratio of different aggregate components to measure aggregate stability. The larger the value, the better the stability of the aggregate. The results are shown in Table 2.

[0089] MWD=ΣX i ·W i

[0090] In the formula, x i is the average diameter of agglomerates in any particle size range, w i It is the ratio of the weight of agglomerates in any particle size range to the total weight of agglomerates.

[0091] Table 2 Effects of different fertilizer treatments on soil properties

[0092] Fertilization type Mean weight diameter MWD No fertilizer 1.05 Example 1 1.40 Example 2 1.37 Example 3 1.46 Example 4 1.51 Example 5 1.58 Comparative Example 1 1.13 Comparative Example 2 1.16 Comparative Example 3 1.18 Comparative Example 4 1.23 Comparative Example 5 1.28 Comparative Example 6 1.25 Comparative Example 7 1.30 Comparative Example 8 1.21

[0093] It can be seen from Table 2 that the MWD values ​​of the soils treated in Examples 1 to 5 are significantly higher than those of the soils not fertilized and treated in Comparative Examples 1 to 8, indicating that the application of the microbial compound fertilizer for improving soil compaction of the present invention effectively improves the compaction condition of the soil.

[0094] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A microbial compound fertilizer for improving soil compaction, characterized in that: The raw materials include the following parts by weight: 40-70 parts of ternary inorganic compound fertilizer, 10-25 parts of microbial compound powder, 12-20 parts of organic matter and 5-15 parts of bioactive agent; The microbial composite powder is prepared by mixing bacillus subtilis powder, bacillus licheniformis powder, bacillus megaterium powder, jelly-like bacillus powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder.

2. The microbial compound fertilizer for improving soil compaction according to claim 1, characterized in that: The mass ratio of the Bacillus subtilis powder, Bacillus licheniformis powder, Bacillus megaterium powder, Bacillus jelly powder, lactic acid bacteria powder, nitrogen-fixing bacteria powder and actinomycete powder is (10-13): (11-14): (12-15): (8-11): (4-9): (5-8): (3-7).

3. The microbial compound fertilizer for improving soil compaction according to claim 1, characterized in that: The ternary inorganic compound fertilizer is prepared by mixing inorganic nitrogen fertilizer, inorganic phosphorus fertilizer and inorganic potassium fertilizer in a mass ratio of (1-5):(1-5):(3-5).

4. The microbial compound fertilizer for improving soil compaction according to claim 1, characterized in that: The organic matter includes humic acid, amino acid, bean curd residue and fruit residue.

5. The microbial compound fertilizer for improving soil compaction according to claim 4, characterized in that: The mass ratio of humic acid, amino acid, bean curd residue and fruit residue is (2-4): (2-4): (3-8): (3-8).

6. The microbial compound fertilizer for improving soil compaction according to claim 1, characterized in that: The bioactive agents include biochar, brown algae oligosaccharide and montmorillonite.

7. The microbial compound fertilizer for improving soil compaction according to claim 6, characterized in that: The mass ratio of the biochar, brown algae oligosaccharide and montmorillonite is (3-7): (5-10): (2-5).

8. The method for preparing the microbial compound fertilizer for improving soil compaction according to any one of claims 1 to 7, characterized in that: The following steps are involved: The microbial composite powder and the bioactive agent are mixed evenly, and then the ternary inorganic composite fertilizer and the organic matter are added and mixed evenly, and the microbial composite fertilizer for improving soil compaction is obtained through granulation.

9. Use of the microbial compound fertilizer for improving soil compaction as described in any one of claims 1 to 7 in improving soil compaction.

10. The use according to claim 9, characterized in that: The application amount of the microbial compound fertilizer for improving soil compaction is 40-80kg / mu.