Novel saline-alkali soil conditioner as well as preparation method and application thereof

Abstract

The invention discloses a novel saline-alkali soil conditioner as well as a preparation method and application thereof, and relates to the technical field of saline-alkali soil improvement, and the formula of the soil conditioner comprises the following components in parts by weight: 6-10 parts of humic acid mixed liquor, 15-25 parts of organic acid, 20-30 parts of nitrogen-phosphorus-potassium mixture, 1-2 parts of compound enzyme and 0.5-1 part of trace element mixture; the nitrogen-phosphorus-potassium mixture comprises a nitrogen source, a phosphorus source and a potassium source. The activity of the compound enzyme is protected and activated by using the matrix, meanwhile, various groups of the matrix, NPK and trace elements form a polymer, and the action mechanism of the polymer is mainly to regulate dominant populations of soil microorganisms, improve soil fertility through nutrition activation, improve salt elimination through a soil aggregate structure, regulate acidity and activate calcium ions to reduce alkali. The matrix and the compound enzyme can increase the number of soil microorganisms, regulate dominant populations of the soil microorganisms and promote the activity of beneficial microorganisms; the enzyme activity is improved, and the buffer capacity and fertility of soil are improved.

Description

Technical Field

[0001] The invention relates to the technical field of saline-alkali land soil improvement, and in particular to a novel saline-alkali land soil improver and a preparation method and application thereof. Background Art

[0002] Improvement of saline-alkali land is of great significance to the sustainable development of agriculture. By improving saline-alkali land, the cultivated land area can be increased and the land use efficiency can be improved, thus ensuring food security and the stability of agricultural production.

[0003] At present, the soil conditioners for saline-alkali land on the market include synthetic foam with open pores, alkaline silicates, high molecular polymers, etc. These conditioners have limitations, and excessive use will have a certain impact on the soil environment.

[0004] Therefore, it is urgent to develop a soil conditioner with small usage, no residue and high efficiency. Summary of the invention

[0005] In order to solve the above-mentioned technical problem of saline-alkali soil improvement, the present invention provides a new saline-alkali soil conditioner and its preparation method and application. The following technical solution is adopted:

[0006] A novel saline-alkali soil conditioner, the soil conditioner formula raw materials include the following components in parts by weight:

[0007] 6-10 parts of humic acid mixture, 15-25 parts of organic acid, 20-30 parts of nitrogen, phosphorus and potassium mixture, 1-2 parts of complex enzyme and 0.5-1 part of trace element mixture;

[0008] The NPK mixture includes a nitrogen source, a phosphorus source, and a potassium source;

[0009] The complex enzyme includes protease, cellulase, β-glucosidase, pectinase and lipase.

[0010] The trace element blend includes iron, zinc, manganese, copper, molybdenum and boron.

[0011] By adopting the above technical scheme, the matrix is ​​used to protect and activate the activity of the complex enzyme. At the same time, various groups of the matrix form polymers with NPK and trace elements. Its mechanism of action is mainly to regulate the dominant population of soil microorganisms, activate nutrition to improve soil fertility, and improve salt removal through the structure of soil aggregates. Acidity regulates and activates calcium ions to reduce alkalinity. The matrix and complex enzymes can increase the number of soil microorganisms, regulate the dominant population of soil microorganisms, promote the activity of beneficial microorganisms, improve enzyme activity, and improve the buffering capacity and fertility of the soil. The matrix forms polymers with NPK and trace elements, changes the soil aggregate structure, increases soil capillary pores and non-capillary pores, reduces soil bulk density, increases soil aeration, increases saturated water conductivity, retains water, reduces evaporation, and effectively improves precipitation utilization efficiency. Through ion exchange and chemical action, the saturation and salinity of the exchangeable Na+ of the soil are reduced. In addition, humic acid and organic acid can promote plant growth and accelerate plant absorption of nutrients.

[0012] Optionally, 10 g / L concentrated molasses fermentation liquid is added to the humic acid aqueous solution and stirred evenly to obtain a humic acid mixed solution containing 5-8 g / L humic acid.

[0013] Optionally, the concentrated molasses fermentation broth comprises high-concentration mature organic matter, biochemical fulvic acid and amino acids in a weight ratio of 1:2:2.

[0014] By adopting the above technical scheme, the concentrated molasses fermentation liquid can provide organic acids, and the decomposed organic matter, biochemical fulvic acid and amino acids in the concentrated molasses fermentation liquid can promote the release of nutrients in the soil and improve the utilization rate of nutrients by plants.

[0015] Optionally, the nitrogen, phosphorus and potassium mixture includes the following components in parts by weight: 12-16 parts of nitrogen source, 5-7 parts of phosphorus source, and 3-5 parts of potassium source.

[0016] Optionally, the nitrogen source is urea, the phosphorus source is monoammonium phosphate, and the potassium source is a mixture of potassium hydroxide and potassium nitrate in a weight ratio of 1:1.

[0017] By adopting the above technical solution, nitrogen, phosphorus and potassium provide plants with a large amount of elements required for growth, which is beneficial to the growth and development of plants.

[0018] Optionally, the complex enzyme includes the following components in parts by weight:

[0019] 25-30 parts of protease, 15-20 parts of cellulase, 5-10 parts of beta-glucosidase, 5-10 parts of pectinase, 5-10 parts of lipase.

[0020] By adopting the above technical solutions, the matrix and compound enzyme can increase the number of soil microorganisms, regulate the dominant population of soil microorganisms, promote the activities of beneficial microorganisms, improve enzyme activity, and improve the buffering capacity and fertility of the soil. The matrix forms aggregates with NPK and trace elements, changes the soil aggregate structure, increases soil capillary pores and non-capillary pores, reduces soil bulk density, increases soil aeration, increases saturated hydraulic conductivity, retains water, reduces evaporation, and effectively improves precipitation utilization efficiency.

[0021] Optionally, the trace element mixture includes the following components in parts by weight:

[0022] 5-10 parts of iron, 5-10 parts of zinc, 5-10 parts of manganese, 1-2 parts of copper, 0.5-1 part of molybdenum and 0.5-1 part of boron.

[0023] By adopting the above technical solution, the trace elements required for plant growth can be supplemented and physiological diseases caused by trace element deficiency can be prevented.

[0024] A novel method for preparing a saline-alkali soil conditioner is used to prepare a novel saline-alkali soil conditioner, comprising the following steps:

[0025] Step 1, dissolving 6-10 g of humic acid in about 990 ml of water, stirring evenly to obtain a humic acid aqueous solution;

[0026] Step 2, preparing 10 g / L concentrated molasses fermentation liquid with high concentration of mature organic matter, biochemical fulvic acid and amino acid in a weight ratio of 1:2:2, adding 10 g / L concentrated molasses fermentation liquid to the humic acid aqueous solution, and continuing to stir evenly to obtain a humic acid mixed solution;

[0027] Step 3, add 15 parts of urea, 6 parts of monoammonium phosphate, 2 parts of potassium hydroxide and 2 parts of potassium nitrate, and stir evenly;

[0028] Step 4, add 2 parts of compound enzyme and continue stirring;

[0029] Step 5, add 1 part of trace elements and stir evenly, and after all ingredients are fully mixed, a soil conditioner is obtained.

[0030] Optionally, a stainless steel mesh slow-release device is used to release the soil conditioner, comprising the following steps:

[0031] Step 1, pouring the soil conditioner prepared in step 5 into a plurality of slow-release pots of a stainless steel mesh slow-release device;

[0032] Step 2, using engineering equipment to press the skirt at the bottom of the stainless steel mesh slow-release device into the soil, so that the stainless steel mesh slow-release device is buried in the soil;

[0033] Step 3, the slow-release ports of the multiple slow-release pots continuously seep out the soil conditioner;

[0034] Step 4, after the set time is reached, the stainless steel mesh slow-release device is taken out by using engineering equipment.

[0035] Optionally, the stainless steel mesh slow-release device comprises a basic stainless steel mesh, a liquid injection integrated block and a plurality of slow-release pots, wherein the bottom and top of the basic stainless steel mesh are respectively provided with skirts, the plurality of slow-release pots are respectively installed at the nodes of the basic stainless steel mesh, the bottom and surrounding of the slow-release pot are provided with a plurality of slow-release ports, the top is provided with a liquid injection port, the liquid injection integrated block is installed on the top skirt of the basic stainless steel mesh, the liquid injection integrated block is provided with a liquid inlet and a plurality of liquid outlets, and the plurality of liquid outlets are respectively connected with the liquid injection ports of the plurality of slow-release pots through pipelines;

[0036] The liquid inlet of the liquid injection integrated block is also used to connect to an air source to blow out the residual soil conditioner in a plurality of slow-release pots.

[0037] By adopting the above technical solution, a stainless steel mesh slow-release device is used to release the soil conditioner, which can release the soil conditioner into the saline-alkali soil more evenly and smoothly. The basic stainless steel mesh will not affect the soil and can be recovered and reused after the release of the conditioner is completed. Before recovery, an air source is used to blow air to the liquid inlet of the liquid injection integrated block to blow out the residual soil conditioner in multiple slow-release pots to avoid waste of the soil conditioner.

[0038] The invention discloses an application of a novel saline-alkali land soil conditioner, wherein a novel saline-alkali land soil conditioner preparation method is used to prepare the soil conditioner and the soil conditioner is applied to saline-alkali land soil improvement.

[0039] In summary, the present invention includes at least one of the following beneficial technical effects:

[0040] The present invention can provide a novel saline-alkali soil conditioner and its preparation method and application, which utilizes the matrix to protect and activate the activity of the complex enzyme. At the same time, various groups of the matrix form polymers with NPK and trace elements. Its mechanism of action is mainly to regulate the dominant population of soil microorganisms, activate nutrition to improve soil fertility, and improve salt excretion through the soil aggregate structure, and regulate acidity to activate calcium ions to reduce alkali. The matrix and the complex enzyme can increase the number of soil microorganisms, regulate the dominant population of soil microorganisms, promote the activities of beneficial microorganisms, increase enzyme activity, and improve the buffering capacity and fertility of the soil. The matrix forms polymers with NPK and trace elements, changes the soil aggregate structure, increases soil capillary pores and non-capillary pores, reduces soil bulk density, increases soil aeration, increases saturated water conductivity, retains water, reduces evaporation, and effectively improves precipitation utilization efficiency. Through ion exchange and chemical action, the saturation and salinity of the exchangeable Na+ of the soil are reduced. In addition, humic acid and organic acid can promote plant growth and accelerate plant absorption of nutrients;

[0041] The use of a stainless steel mesh slow-release device to release soil conditioners can release the soil conditioners more evenly and smoothly into saline-alkali soil. The basic stainless steel mesh will not affect the soil and can be recovered and reused after the release of the conditioner is completed. Before recovery, an air source is used to blow air into the liquid inlet of the injection integrated block to blow out the residual soil conditioner in multiple slow-release pots to avoid waste of soil conditioners. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic flow chart of a method for preparing a novel saline-alkali soil conditioner of the present invention;

[0043] Figure 2 It is a schematic diagram of the structural principle of a stainless steel mesh slow-release device used in a method for preparing a novel saline-alkali soil conditioner of the present invention;

[0044] Figure 3 It is a schematic diagram of the structure of a slow-release pot of a stainless steel mesh slow-release device;

[0045] Explanation of the reference numerals: 1. basic stainless steel mesh; 11. skirt; 2. liquid injection integrated block; 3. sustained-release pot; 31. sustained-release port; 32. liquid injection port. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0047] The embodiment of the invention discloses a novel saline-alkali soil conditioner and a preparation method and application thereof.

[0048] Reference Figure 1 - Figure 3 , Example 1, a novel saline-alkali soil conditioner, the soil conditioner formula raw materials include the following components in parts by weight:

[0049] 6-10 parts of humic acid mixture, 15-25 parts of organic acid, 20-30 parts of nitrogen, phosphorus and potassium mixture, 1-2 parts of complex enzyme and 0.5-1 part of trace element mixture;

[0050] The NPK mixture includes a nitrogen source, a phosphorus source, and a potassium source;

[0051] The complex enzyme includes protease, cellulase, β-glucosidase, pectinase and lipase.

[0052] The trace element blend includes iron, zinc, manganese, copper, molybdenum and boron.

[0053] The matrix is ​​used to protect and activate the activity of the complex enzyme. At the same time, various groups of the matrix form polymers with NPK and trace elements. Its mechanism of action is mainly to regulate the dominant population of soil microorganisms, activate nutrients to improve soil fertility, and improve salt removal through the structure of soil aggregates. Acidity regulation activates calcium ions to reduce alkalinity. The matrix and complex enzymes can increase the number of soil microorganisms, regulate the dominant population of soil microorganisms, promote the activity of beneficial microorganisms, improve enzyme activity, and improve the buffering capacity and fertility of the soil. The matrix forms polymers with NPK and trace elements, changes the soil aggregate structure, increases soil capillary pores and non-capillary pores, reduces soil bulk density, increases soil aeration, increases saturated water conductivity, retains water, reduces evaporation, and effectively improves precipitation utilization efficiency. Through ion exchange and chemical action, the saturation and salinity of the exchangeable Na+ of the soil are reduced. In addition, humic acid and organic acid can promote plant growth and accelerate plant absorption of nutrients.

[0054] Example 2: 10 g / L concentrated molasses fermentation liquid is added to the humic acid aqueous solution, and stirred evenly to obtain a humic acid mixed solution containing 5-8 g / L humic acid.

[0055] Example 3: The concentrated molasses fermentation broth comprises high-concentration mature organic matter, biochemical fulvic acid and amino acids in a weight ratio of 1:2:2.

[0056] Concentrated molasses fermentation liquid can provide organic acids. The decomposed organic matter, biochemical fulvic acid and amino acids in the concentrated molasses fermentation liquid can promote the release of nutrients in the soil and improve the utilization rate of nutrients by plants.

[0057] Example 4, the nitrogen, phosphorus and potassium mixture includes the following components in parts by weight: 12-16 parts of nitrogen source, 5-7 parts of phosphorus source, and 3-5 parts of potassium source.

[0058] In Example 5, the nitrogen source is urea, the phosphorus source is monoammonium phosphate, and the potassium source is a mixture of potassium hydroxide and potassium nitrate in a weight ratio of 1:1.

[0059] Nitrogen, phosphorus and potassium provide plants with a large amount of elements needed for growth, which is beneficial to the growth and development of plants.

[0060] Embodiment 6, complex enzyme comprises the following components by weight:

[0061] 25-30 parts of protease, 15-20 parts of cellulase, 5-10 parts of beta-glucosidase, 5-10 parts of pectinase, 5-10 parts of lipase.

[0062] The matrix and complex enzymes can increase the number of soil microorganisms, regulate the dominant population of soil microorganisms, promote the activities of beneficial microorganisms, increase enzyme activity, and improve the buffering capacity and fertility of the soil. The matrix forms aggregates with NPK and trace elements, changes the soil aggregate structure, increases soil capillary pores and non-capillary pores, reduces soil bulk density, increases soil aeration, increases saturated hydraulic conductivity, retains water, reduces evaporation, and effectively improves the utilization efficiency of precipitation.

[0063] Embodiment 7, the trace element mixture comprises the following components in parts by weight:

[0064] 5-10 parts of iron, 5-10 parts of zinc, 5-10 parts of manganese, 1-2 parts of copper, 0.5-1 part of molybdenum and 0.5-1 part of boron.

[0065] Supplement the trace elements needed for plant growth and prevent physiological diseases caused by trace element deficiency.

[0066] Example 8, a method for preparing a novel saline-alkali soil conditioner, for preparing a novel saline-alkali soil conditioner, comprising the following steps:

[0067] Step 1, dissolving 6-10 g of humic acid in about 990 ml of water, stirring evenly to obtain a humic acid aqueous solution;

[0068] Step 2, preparing 10 g / L concentrated molasses fermentation liquid with high concentration of mature organic matter, biochemical fulvic acid and amino acid in a weight ratio of 1:2:2, adding 10 g / L concentrated molasses fermentation liquid to the humic acid aqueous solution, and continuing to stir evenly to obtain a humic acid mixed solution;

[0069] Step 3, add 15 parts of urea, 6 parts of monoammonium phosphate, 2 parts of potassium hydroxide and 2 parts of potassium nitrate, and stir evenly;

[0070] Step 4, add 2 parts of compound enzyme and continue stirring;

[0071] Step 5, add 1 part of trace elements and stir evenly, and after all ingredients are fully mixed, a soil conditioner is obtained.

[0072] Example 9, using a stainless steel mesh slow-release device to release a soil conditioner, comprises the following steps:

[0073] Step 1, pouring the soil conditioner prepared in step 5 into a plurality of slow-release pots 3 of a stainless steel mesh slow-release device;

[0074] Step 2, using engineering equipment to press the skirt 11 at the bottom of the stainless steel mesh slow-release device into the soil, so that the stainless steel mesh slow-release device is buried in the soil;

[0075] Step 3, the slow-release ports of the multiple slow-release pots 3 continuously seep out the soil conditioner;

[0076] Step 4, after the set time is reached, the stainless steel mesh slow-release device is taken out by using engineering equipment.

[0077] The stainless steel mesh slow-release device comprises a basic stainless steel mesh 1, a liquid injection integrated block 2 and a plurality of slow-release pots 3, wherein the bottom and the top of the basic stainless steel mesh 1 are respectively provided with skirts 11, the plurality of slow-release pots 3 are respectively installed at the nodes of the basic stainless steel mesh 1, the bottom and the surrounding of the slow-release pots 3 are provided with a plurality of slow-release ports 31, and the top is provided with a liquid injection port 32, the liquid injection integrated block 2 is installed on the top skirt 11 of the basic stainless steel mesh 1, the liquid injection integrated block 2 is provided with a liquid inlet and a plurality of liquid outlets, and the plurality of liquid outlets are respectively connected with the liquid injection ports 32 of the plurality of slow-release pots 3 through pipelines;

[0078] The liquid inlet of the liquid injection integrated block 2 is also used to connect to an air source to blow out the residual soil conditioner in the plurality of slow-release pots 3 .

[0079] The use of a stainless steel mesh slow-release device to release soil conditioners can release the soil conditioners more evenly and steadily into saline-alkali soil. The basic stainless steel mesh 1 will not affect the soil and can be recycled and reused after the release of the conditioner is completed. Before recycling, an air source is used to blow air to the liquid inlet of the liquid injection integrated block 2 to blow out the residual soil conditioners in the multiple slow-release pots 3 to avoid waste of soil conditioners. In order to facilitate insertion and removal, the slow-release pot 3 can be designed in a flat shape.

[0080] Example 10, application of a new saline-alkali land soil conditioner, using a new saline-alkali land soil conditioner preparation method to prepare the soil conditioner and apply it to saline-alkali land soil improvement.

[0081] The following specific examples are used to illustrate the implementation principle of a novel saline-alkali soil conditioner and its preparation method and application: Specific embodiment 1:

[0083] Mix soil conditioners with conventional compound fertilizers. In 2023, a test was conducted on autumn rice at an agricultural science institute in a certain province and city. The test variety was white rice 1, and the soil conditioner application rate was 7.5 kg / hectare; the compound fertilizer application rate was 600 kg / hectare. The conventional compound fertilizer selected had a total nitrogen, phosphorus and potassium content of 33% (17-6-10), which was used as a base fertilizer once. The test results are shown in Table 1 (the price of rice is calculated at 2.4 yuan / kg, and the price of soil conditioner is calculated at 40 yuan / kg):

[0084] Table 1 Test results of white rice 1

[0085] Specific embodiment 2:

[0087] Soil conditioners are drip-irrigated together with conventional compound fertilizers. In 2023, the test was conducted on corn in Hotan, Xinjiang. The test variety was Zhengdan 958, and the soil conditioner fertilizer application rate was 7.5 kg / hectare; the conventional compound fertilizer selected had a total nitrogen, phosphorus and potassium content of 45% (15-15-15), and the fertilizer application rate was 750 kg / hectare. The test results are shown in Table 2 (the price of corn is calculated at 2.2 yuan / kg, and the price of soil conditioners is calculated at 40 yuan / kg).

[0088] Table 2 Test results of Zhengdan 958

[0089] Specific embodiment 3:

[0091] The soil conditioner is slowly released together with conventional compound fertilizers using a stainless steel mesh slow-release device. In 2023, the test was conducted on corn in Hotan, Xinjiang. The test variety was Zhengdan 958, and the soil conditioner fertilizer application rate was 7.5 kg / hectare; the conventional compound fertilizer selected had a total nitrogen, phosphorus and potassium content of 45% (15-15-15), and the fertilizer application rate was 750 kg / hectare. The test results are shown in Table 3 (the price of corn is calculated at 2.2 yuan / kg, and the price of soil conditioner is calculated at 40 yuan / kg).

[0092] Table 3 Slow-release test results of the stainless steel mesh slow-release device of Zhengdan 958

[0093]

[0094] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel saline-alkali soil conditioner, characterized in that: The raw materials of the soil conditioner formula include the following components in parts by weight: 6-10 parts of humic acid mixture, 15-25 parts of organic acid, 20-30 parts of nitrogen, phosphorus and potassium mixture, 1-2 parts of complex enzyme and 0.5-1 part of trace element mixture; The NPK mixture includes a nitrogen source, a phosphorus source, and a potassium source; The complex enzyme includes protease, cellulase, β-glucosidase, pectinase and lipase. The trace element blend includes iron, zinc, manganese, copper, molybdenum and boron.

2. The novel saline-alkali soil conditioner according to claim 1, characterized in that: Add 10 g / L concentrated molasses fermentation liquid into the humic acid aqueous solution, stir evenly, and obtain a humic acid mixed solution containing 5-8 g / L humic acid.

3. The novel saline-alkali soil conditioner according to claim 2, characterized in that: The concentrated molasses fermentation liquid comprises high-concentration decomposed organic matter, biochemical fulvic acid and amino acids in a weight ratio of 1:2:

2.

4. A novel saline-alkali soil conditioner according to claim 1, characterized in that: The nitrogen, phosphorus and potassium mixture comprises the following components in parts by weight: 12-16 parts of a nitrogen source, 5-7 parts of a phosphorus source, and 3-5 parts of a potassium source; The nitrogen source is urea, the phosphorus source is monoammonium phosphate, and the potassium source is a mixture of potassium hydroxide and potassium nitrate in a weight ratio of 1:

1.

5. The novel saline-alkali soil conditioner according to claim 1, characterized in that: The complex enzyme comprises the following components in parts by weight: 25-30 parts of protease, 15-20 parts of cellulase, 5-10 parts of beta-glucosidase, 5-10 parts of pectinase, 5-10 parts of lipase.

6. The novel saline-alkali soil conditioner according to claim 1, characterized in that: The trace element mixture includes the following components in parts by weight: 5-10 parts of iron, 5-10 parts of zinc, 5-10 parts of manganese, 1-2 parts of copper, 0.5-1 part of molybdenum and 0.5-1 part of boron.

7. A method for preparing a novel saline-alkali soil conditioner, characterized in that: The method for preparing the novel saline-alkali soil conditioner according to claims 1 to 6 comprises the following steps: Step 1, dissolving 6-10 g of humic acid in about 990 ml of water, stirring evenly to obtain a humic acid aqueous solution; Step 2, preparing 10 g / L concentrated molasses fermentation liquid with high concentration of mature organic matter, biochemical fulvic acid and amino acid in a weight ratio of 1:2:2, adding 10 g / L concentrated molasses fermentation liquid to the humic acid aqueous solution, and continuing to stir evenly to obtain a humic acid mixed solution; Step 3, add 15 parts of urea, 6 parts of monoammonium phosphate, 2 parts of potassium hydroxide and 2 parts of potassium nitrate, and stir evenly; Step 4, add 2 parts of compound enzyme and continue stirring; Step 5, add 1 part of trace elements and stir evenly, and after all ingredients are fully mixed, a soil conditioner is obtained.

8. The method for preparing a novel saline-alkali soil conditioner according to claim 7, characterized in that: The release of soil conditioner using a stainless steel mesh slow-release device includes the following steps: Step 1, pouring the soil conditioner prepared in step 5 into a plurality of slow-release pots (3) of a stainless steel mesh slow-release device; Step 2, using engineering equipment to press the skirt (11) at the bottom of the stainless steel mesh slow-release device into the soil, so that the stainless steel mesh slow-release device is buried in the soil; Step 3, the slow-release openings of the plurality of slow-release pots (3) continuously seep out the soil conditioner; Step 4, after the set time is reached, the stainless steel mesh slow-release device is taken out by using engineering equipment.

9. The method for preparing a novel saline-alkali soil conditioner according to claim 8, characterized in that: The stainless steel mesh slow-release device comprises a basic stainless steel mesh (1), a liquid injection integrated block (2) and a plurality of slow-release pots (3); the bottom and top of the basic stainless steel mesh (1) are respectively provided with skirts (11); the plurality of slow-release pots (3) are respectively installed at the nodes of the basic stainless steel mesh (1); the bottom and surrounding of the slow-release pots (3) are provided with a plurality of slow-release ports (31); the top is provided with a liquid injection port (32); the liquid injection integrated block (2) is installed on the top skirt (11) of the basic stainless steel mesh (1); the liquid injection integrated block (2) is provided with a liquid inlet and a plurality of liquid outlets; the plurality of liquid outlets are respectively connected to the liquid injection ports (32) of the plurality of slow-release pots (3) through pipelines; The liquid inlet of the liquid injection integrated block (2) is also used to connect to an air source to blow out the residual soil improver in the plurality of slow-release pots (3).

10. Application of a novel saline-alkali soil conditioner, characterized in that: The soil conditioner is prepared by the novel saline-alkali land soil conditioner preparation method described in claim 9 and is applied to saline-alkali land soil improvement.

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