Organic fertilizer for improving soil fertility of sand land

Abstract

The invention relates to the technical field of land treatment, in particular to an organic fertilizer for improving the soil fertility of a sand land. Comprising the following raw materials in parts by weight: 3-12 parts of a microbial agent, 20-50 parts of volcanic rock, 5-12 parts of an additive, 32-45 parts of sodium bentonite, 12-18 parts of a functional agent, 5-25 parts of a modifier and 15-32 parts of a water retention material. By increasing organic matters in the soil, the viscosity of the soil is improved, the air permeability, water retention and permeability of the soil are improved, the formation of a soil aggregate structure is promoted, and the water and fertilizer retention capability of the sand soil is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of land management, and more particularly to an organic fertilizer for improving the fertility of sandy land. Background Art

[0002] Sandy soils are characterized by loose, unstructured particles, poor fertility, and poor water and fertilizer retention. These characteristics are as follows: Sandy soil particles are large, but mostly composed of calcium silicate, quartz, and mica minerals, resulting in high hardness and poor hydrophilicity; The soil has large pores, allowing for good water and air permeability, but few small pores, resulting in weak capillary action and poor water retention; Organic matter decomposes rapidly, accumulating little, leading to nutrient leaching and poor fertility; Sandy soils also have poor water and fertilizer retention and unstable temperatures, resulting in a harsh soil microenvironment and a poor habitat for microorganisms.

[0003] In agricultural production, drought can easily occur if water is not replenished promptly. Fertilization in sandy soils is effective quickly, allowing crops to grow quickly and quickly, but this lacks stamina, often leading to nutrient deficiency and premature aging, low fruit set, and weak grains. These soils neither retain nor tolerate fertilizer. Applying too much fertilizer at once not only results in loss and waste, but also causes crops to grow excessively. Therefore, sandy soils require improvement during cultivation.

[0004] In existing technologies, the high temperatures of sandy soils promote the mineralization of organic matter, but nutrients are easily lost with leaching after rainfall or irrigation. Organic fertilizers require microbial decomposition to release nutrients, resulting in a delayed and sluggish effect. Sandy soils have good air permeability and high microbial activity. While this accelerates the decomposition of organic matter, the initial decomposition phase still cannot meet the rapid nutrient demands of crops during the seedling stage, potentially leading to the phenomenon of "small seedlings growing but not old ones." Summary of the Invention

[0005] The present invention provides an organic fertilizer for improving the soil fertility of sandy land. The organic fertilizer increases the organic matter in the soil, improves the viscosity of the soil, improves the air permeability, water retention and permeability of the soil, promotes the formation of soil aggregate structure, and improves the water and fertilizer retention capacity of the sandy soil.

[0006] In a first aspect, the present invention provides an organic fertilizer for improving the fertility of sandy land, comprising the following raw materials in parts by weight: 3-12 parts of microbial agents, 20-50 parts of volcanic rocks, 5-12 parts of additives, 32-45 parts of sodium bentonite, 12-18 parts of functional agents, 5-25 parts of improvers, and 15-32 parts of water-retaining materials.

[0007] Preferably, the microbial agent comprises Bacillus subtilis, Bacillus megaterium, Bacillus mucilaginosus and Azotobacter rotundus mixed in proportion.

[0008] Preferably, the total concentration of the microbial agent is 6.5-7.5×10 9 CFU / mL.

[0009] Preferably, the mass ratio of the Bacillus subtilis, Bacillus megaterium, Bacillus mucilaginosus and Azotobacter rotundus is 2-5:1-3:1-2:1.

[0010] Preferably, the additive is one or more of poultry and livestock manure, biogas residue, decomposed weeds, fermented soybean meal, scutellaria baicalensis residue and tea residue.

[0011] Preferably, the functional agent includes bentonite, straw and wormwood gum, and the mass ratio of the bentonite, straw and wormwood gum is 0.5-2:1:1-3.

[0012] Preferably, the improver comprises humic acid, cellulose, lignin, clay particles and biochar, and the mass ratio of the humic acid, cellulose, lignin, clay particles and biochar is 2-5:1-2:1-3:2-3:0.5-1.

[0013] Preferably, the water-retaining material comprises γ-polyglutamic acid and sodium alginate, and the mass ratio of the γ-polyglutamic acid to sodium alginate is 1-5:1.

[0014] In a second aspect, the present invention provides an application of the organic fertilizer for improving sandy soil fertility in sandy soil improvement.

[0015] In summary, the present invention has the following beneficial effects:

[0016] 1. The polysaccharides, organic acids, and other metabolites secreted by the microorganisms in the microbial agent of this invention act as a binder, promoting sand agglomeration. As a synergistic component of organic fertilizer, the microbial agent significantly improves sandy land improvement through multi-dimensional synergistic effects. Bacillus subtilis, Bacillus megaterium, Bacillus mucilaginosus, and Azotobacter rotundus play a significant role in improving soil structure, promoting plant growth, and increasing soil fertility.

[0017] 2. The functional agent of the present invention includes bentonite, straw and artemisia glue. Bentonite can absorb water and swell, change the ratio of solid, liquid and gas in the soil, loosen the soil structure, and improve the air permeability and water permeability of the soil. Bentonite has a strong water retention capacity, which can increase the water holding capacity of the soil, reduce water loss, and at the same time increase the cation exchange capacity of the soil, and enhance the soil's ability to adsorb and retain nutrients. Straw, as a source of organic fertilizer, can provide rich organic matter, and the adsorption and viscosity of bentonite contribute to the stabilization of organic matter and promote its conversion into humus. Artemisia glue enhances the fixation and retention of organic matter in the soil through its colloidal properties. The synergistic effect of artemisia glue, straw organic fertilizer and bentonite increases the content of soil organic matter, improves soil structure, enhances water and fertilizer retention capacity, promotes microbial activity, regulates soil physical and chemical properties and promotes nutrient circulation.

[0018] 3. The present invention improves soil viscosity, soil air permeability, water retention and permeability by increasing organic matter in the soil, promoting the formation of soil aggregate structure, and improving the water and fertilizer retention capacity of sandy soil.

[0019] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the scope of protection of the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the examples. It is particularly noted that if no specific conditions are specified in the following examples, the reactions were carried out according to conventional conditions or the conditions recommended by the manufacturer. Unless otherwise specified, the raw materials used in the following examples can be obtained from common commercial sources.

[0021] Example

[0022] Example 1

[0023] An organic fertilizer for improving sandy soil fertility comprises the following raw materials in parts by weight: 3 parts of microbial agents, 20 parts of volcanic rocks, 5 parts of additives, 32 parts of sodium bentonite, 12 parts of functional agents, 5 parts of improvers, and 15 parts of water-retaining materials.

[0024] The microbial agent includes Bacillus subtilis, Bacillus megaterium, Bacillus mucilaginosus and Azotobacter rotundus, which are mixed in proportion. The mass ratio of Bacillus subtilis, Bacillus megaterium, Bacillus mucilaginosus and Azotobacter rotundus is 2:1:1:1, and the total concentration of the microbial agent is 6.5×10 9 CFU / mL.

[0025] The additive is scutellaria baicalensis residue; the functional agents include bentonite, straw and wormwood gum, and the mass ratio of bentonite, straw and wormwood gum is 0.5:1:1.

[0026] The modifiers include humic acid, cellulose, lignin, clay particles and biochar, and the mass ratio of humic acid, cellulose, lignin, clay particles and biochar is 2:1:1:2:0.5.

[0027] The water-retaining material includes gamma-polyglutamic acid and sodium alginate in a mass ratio of 1:1.

[0028] Example 2

[0029] An organic fertilizer for improving sandy soil fertility comprises the following raw materials in parts by weight: 8 parts of microbial agents, 30 parts of volcanic rocks, 9 parts of additives, 38 parts of sodium bentonite, 15 parts of functional agents, 18 parts of improvers, and 25 parts of water-retaining materials.

[0030] The microbial agent includes Bacillus subtilis, Bacillus megaterium, Bacillus colloids and Azotobacter rotundus, which are mixed in proportion. The mass ratio of Bacillus subtilis, Bacillus megaterium, Bacillus colloids and Azotobacter rotundus is 3:2:1:1, and the total concentration of the microbial agent is 7.0×10 9 CFU / mL.

[0031] The additive is scutellaria baicalensis residue; the functional agents include bentonite, straw and wormwood gum, and the mass ratio of bentonite, straw and wormwood gum is 1:1:2.

[0032] The modifiers include humic acid, cellulose, lignin, clay particles and biochar, and the mass ratio of humic acid, cellulose, lignin, clay particles and biochar is 3:2:2:2:1.

[0033] The water-retaining material includes gamma-polyglutamic acid and sodium alginate in a mass ratio of 3:1.

[0034] Example 3

[0035] An organic fertilizer for improving sandy soil fertility comprises the following raw materials in parts by weight: 12 parts of microbial agent, 50 parts of volcanic rock, 12 parts of additive, 45 parts of sodium bentonite, 18 parts of functional agent, 25 parts of improver, and 32 parts of water-retaining material.

[0036] The microbial agent includes Bacillus subtilis, Bacillus megaterium, Bacillus colloids and Azotobacter rotundus, which are mixed in proportion. The mass ratio of Bacillus subtilis, Bacillus megaterium, Bacillus colloids and Azotobacter rotundus is 5:3:2:1, and the total concentration of the microbial agent is 7.5×10 9 CFU / mL.

[0037] The additive is scutellaria baicalensis residue; the functional agents include bentonite, straw and wormwood gum, and the mass ratio of bentonite, straw and wormwood gum is 2:1:3.

[0038] The modifiers include humic acid, cellulose, lignin, clay particles and biochar, and the mass ratio of humic acid, cellulose, lignin, clay particles and biochar is 5:2:3:3:1.

[0039] The water-retaining material includes γ-polyglutamic acid and sodium alginate with a mass ratio of 5:1.

[0040] Comparative Example 1

[0041] The difference from Example 1 is that no functional agent is added.

[0042] Comparative Example 2

[0043] The difference from Example 1 is that no modifier is added.

[0044] Test example

[0045] Soil properties of the test site: aeolian sandy soil.

[0046] Ten plots of land with the same sandy soil properties were selected, and the organic fertilizers for improving sandy soil fertility prepared in Examples 1-3 and Comparative Examples 1-2 were applied respectively.

[0047] The application amount is: 3 tons / mu.

[0048] Application method: Evenly spread on the soil surface and then till the soil to a depth of 30 cm.

[0049] Application time: 3 days before the Grain in Ear solar term.

[0050] After application, corn crops were planted and conventional field management methods were adopted. After the corn was harvested, the fields that used organic fertilizers to improve sandy soil fertility were tested and compared.

[0051] Moisture content detection

[0052] Testing method: Sample equal volumes of soil from the 10-30 cm layer. The mass of the soil after sampling is weighed (m1). The mass of the soil after drying is weighed (m2). The moisture content is calculated as: moisture content = (m1 - m2) / m2. The test results are shown in Table 1.

[0053] Table 1

[0054] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Moisture content (%) 8.55 8.28 8.46 5.12 3.16

[0055] As can be seen from Table 1, the organic fertilizer for improving sandy soil fertility prepared in Example 1 has a greater impact on the water content of the sandy soil, which shows that by increasing the organic matter in the soil, the viscosity of the soil is improved and the water retention of the soil is improved.

[0056] The foregoing description is merely an exemplary embodiment of the present invention, and the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An organic fertilizer for improving sandy soil fertility, characterized in that: The invention comprises the following raw materials in parts by weight: 3-12 parts of microbial agent, 20-50 parts of volcanic rock, 5-12 parts of additive, 32-45 parts of sodium bentonite, 12-18 parts of functional agent, 5-25 parts of improver and 15-32 parts of water-retaining material.

2. The organic fertilizer for improving sandy soil fertility according to claim 1, wherein The microbial agent comprises Bacillus subtilis, Bacillus megaterium, Bacillus colloids and Azotobacter rotundus, which are mixed in proportion.

3. The organic fertilizer for improving sandy soil fertility according to claim 1, wherein The total concentration of the microbial agent is 6.5-7.5×10 9 CFU / mL.

4. The organic fertilizer for improving sandy soil fertility according to claim 1, wherein The mass ratio of the Bacillus subtilis, Bacillus megaterium, Bacillus mucilaginosus and Azotobacter rotundus is 2-5:1-3:1-2:

1.

5. The organic fertilizer for improving sandy soil fertility according to claim 1, wherein The additive is one or more of poultry and livestock dry manure, biogas residue, decomposed weeds, fermented soybean meal, scutellaria baicalensis residue and tea residue.

6. The organic fertilizer for improving sandy soil fertility according to claim 1, wherein The functional agent comprises bentonite, straw and wormwood gum, and the mass ratio of the bentonite, straw and wormwood gum is 0.5-2:1:1-3.

7. The organic fertilizer for improving sandy soil fertility according to claim 1, wherein The improver comprises humic acid, cellulose, lignin, clay particles and biochar, and the mass ratio of the humic acid, cellulose, lignin, clay particles and biochar is 2-5:1-2:1-3:2-3:0.5-1.

8. The organic fertilizer for improving sandy soil fertility according to claim 1, wherein The water-retaining material comprises gamma-polyglutamic acid and sodium alginate, and the mass ratio of the gamma-polyglutamic acid to the sodium alginate is 1-5:

1.

9. Use of the organic fertilizer for improving sandy soil fertility as claimed in claim 8 in improving sandy soil.