Soil conditioner for ash yard of coal-fired power plant as well as preparation method and application of soil conditioner

Abstract

The invention belongs to the technical field of soil conditioners, and particularly relates to a coal-fired power plant ash yard soil conditioner and a preparation method and application thereof. The soil conditioner for the ash yard of the coal-fired power plant is prepared from the following raw materials in parts by weight: 430 to 450 parts of potassium fulvate, 50 to 60 parts of humic acid, 50 to 60 parts of fuliqing, 250 to 270 parts of chelated fertilizer, 500 to 550 parts of organic fertilizer and 160 to 180 parts of biological bacterial fertilizer. The soil conditioner disclosed by the invention has the beneficial effects that the soil conditioner disclosed by the invention can be used for effectively improving the physicochemical characteristics of lime soil of a coal-fired power plant ash yard and improving the transfer absorption rate and the utilization rate of moisture and nutrient elements required by plant growth supplied by the soil, so that the purposes of improving the soil structure, increasing humus, preventing wind and stabilizing sand are achieved; finally, the goals of coal-fired power plant ash yard soil improvement and vegetation recovery are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of soil conditioners, and in particular relates to a soil conditioner for an ash field of a coal-fired power plant, and a preparation method and application thereof. Background Art

[0002] The land used for construction projects such as photovoltaic power generation and wind power generation must have natural conditions such as sufficient solar and thermal sunshine, strong and scorching sunlight, drought and little rain, no long-term cloudy days, and little rain and snow; and must avoid areas where geological disasters frequently occur; there must be no obstructions around it; and the wind speed must be greater than 6.5 meters per second, etc.

[0003] In addition, the selection of land for construction projects such as photovoltaic power generation and wind power generation shall not occupy agricultural land; if inferior land can be used, good land shall not be occupied. It is prohibited to occupy permanent basic farmland and paddy fields in general cultivated land in any way. Therefore, photovoltaic power generation and wind power generation construction in the north can only choose deserts, sandy land, Gobi, saline-alkali land, mines, solid waste storage sites, ash fields and other places with relatively low land prices and low utilization rates. To scientifically and rationally utilize climate resources and promote green development, it is necessary to carry out ecological restoration and protection and utilization of deserts, sandy land, Gobi, saline-alkali land, mines, solid waste sites, ash fields, etc. How to scientifically, orderly, long-term and sustainable ecological comprehensive management of the new energy site environment and carry out supporting soil improvement at the same time, and restore the agricultural and animal husbandry and grassland productivity of the land resources of the new energy site, is the only way for the country's energy development, and it is also an important new research and development field topic in agriculture, animal husbandry, forestry and grassland, ecology and environmental science today. Summary of the invention

[0004] The present application provides a soil conditioner for coal-fired power plant ash fields, a preparation method thereof, and an application thereof, aiming to solve the problems of severe air pollution, severe soil pollution, and inability to grow vegetation in coal-fired power plant ash fields.

[0005] The first aspect of the present application provides a soil conditioner for an ash field of a coal-fired power plant, comprising the following raw materials in parts by weight: 430-450 parts of potassium humate, 50-60 parts of humic acid, 50-60 parts of fungicides, 250-270 parts of chelated fertilizer, 500-550 parts of organic fertilizer and 160-180 parts of biological fertilizer.

[0006] The soil conditioner described in the present application can effectively improve the physical and chemical properties of the ash soil in the ash yard of a coal-fired power plant, increase the transport, absorption and utilization rate of the soil in supplying water and nutrients required for plant growth, thereby achieving the purpose of improving the soil structure, increasing humus and preventing wind and sand, and ultimately achieving the goal of improving the soil and restoring vegetation in the ash yard of a coal-fired power plant.

[0007] According to some embodiments of the coal-fired power plant ash field soil conditioner described in the present application, the following raw materials are included in parts by weight: 430-440 parts of potassium humate, 52-56 parts of humic acid, 52-56 parts of Bacterial Fertilizer, 260-268 parts of chelated fertilizer, 520-535 parts of organic fertilizer and 172-176 parts of biological fertilizer.

[0008] According to some embodiments of the coal-fired power plant ash field soil conditioner described in the present application, the raw materials are included in parts by weight: 435 parts of potassium humate, 55 parts of humic acid, 55 parts of Bacterial Cleaner, 265 parts of chelated fertilizer, 525 parts of organic fertilizer and 175 parts of biological fertilizer.

[0009] The second aspect of the present application provides a method for preparing the coal-fired power plant ash field soil conditioner described in the first aspect of the present application, comprising the following steps: mixing potassium humate, humic acid, Bacteria-free, chelated fertilizer, organic fertilizer and biological bacterial fertilizer.

[0010] The third aspect of the present application provides a method for improving the soil in the ash field of a coal-fired power plant, which is improved by using the coal-fired power plant ash field soil conditioner described in the first aspect of the present application or the coal-fired power plant ash field soil conditioner obtained by the preparation method described in the second aspect of the present application.

[0011] According to some embodiments of the method for improving the soil in the ash field of a coal-fired power plant described in the present application, the following steps are included:

[0012] (1) spreading the soil conditioner on the soil to be improved and tilling the soil;

[0013] (2) Planting plants on the tilled soil and spreading the soil conditioner.

[0014] The method for improving the soil in the ash field of a coal-fired power plant described in the present application adopts suitable conditions for the growth of vegetation in the ash field of a coal-fired power plant to restore vegetation, effectively degrades dead branches and leaves of vegetation and increases the organic matter in the ash soil in the ash field. After three years of using the improvement method described in the present application, a 2-3 cm humus layer is formed on the surface of the ash field; the color of the ash field soil changes from gray to black gray and yellow gray, effective micro-aggregates have been formed in the soil structure, the soil porosity is improved and has a good ability to retain moisture and fertilizer, and the nutrient content in the soil is increased.

[0015] According to some embodiments of the method for improving the soil in the ash field of a coal-fired power plant described in the present application, in step (1), the application amount of the soil conditioner is 800-1200 g / m 2 , preferably 1000g / m 2 .

[0016] According to some embodiments of the method for improving the soil in the ash field of a coal-fired power plant described in the present application, the tillage depth is 8-12 cm.

[0017] According to some embodiments of the method for improving the soil in the ash field of a coal-fired power plant described in the present application, the plants include one or more of Agave serrata, Puccinellia tenuifolia, Agropyron crassifolia, Caragana angustifolia, Sophora alopecuroides, and Medicago truncatula.

[0018] According to some embodiments of the method for improving the soil in the ash field of a coal-fired power plant described in the present application, the sowing amount of the plant is 42-48 g / m 2 , the sowing depth of the plants is 1-4 cm.

[0019] According to some embodiments of the method for improving the soil in the ash field of a coal-fired power plant described in the present application, in step (2), the application amount of the soil conditioner is 400-600 g / m 2 , preferably 500g / m 2 . DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below. The examples of the embodiments are exemplary and intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0021] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0022] The embodiment of the present application provides a soil conditioner for an ash field of a coal-fired power plant, comprising the following raw materials in parts by weight: 430-450 parts of potassium humate, 50-60 parts of humic acid, 50-60 parts of fungicides, 250-270 parts of chelated fertilizer, 500-550 parts of organic fertilizer and 160-180 parts of biological fertilizer.

[0023] Potassium humate can activate compacted soil, improve soil aggregate structure, increase soil water and fertilizer retention capacity, adjust pH value, reduce the content of heavy metals in soil, and reduce the harm of salt ions to plant seeds and seedlings. In addition, potassium humate also has the functions of nitrogen fixation, phosphorus dissolution, and potassium activation; it has a good synergistic effect on potassium fertilizer, can strengthen the adhesion and rapid absorption capacity of plant roots, and has a significant effect on physiological diseases caused by the lack of trace elements.

[0024] Humic acid is a macromolecular organic substance widely found in nature and widely used in agriculture, forestry, animal husbandry, petroleum, chemical industry, building materials, medicine and health, environmental protection and other fields. Humic acid fertilizers made by combining humic acid with nitrogen, phosphorus, potassium and other elements have the functions of increasing fertilizer efficiency, improving soil, stimulating crop growth and improving the quality of agricultural products.

[0025] Junliqing is composed of multiple active ingredients, the main ingredient of which is ammonium chloride, a bactericide. It can interact with chemical substances such as bacterial membrane proteins, nucleic acids, sugars, etc. to kill bacteria. It has the advantages of fast bactericidal action and long-lasting effect.

[0026] Chelated fertilizers, also known as chelated trace element fertilizers, are fertilizers made of chelating agents and trace elements necessary for plants (except boron and molybdenum), such as chelated zinc, chelated iron, chelated manganese, chelated copper, etc. Chelated fertilizers are not easily fixed in the soil, are easily soluble in water, and do not dissociate, and can be well absorbed and utilized by plants. They can also be mixed with other solid or liquid fertilizers for application without chemical reaction, and do not reduce the fertilizer efficiency of any fertilizer.

[0027] Organic fertilizers are all organic materials (compounds containing carbon) used as fertilizers. Most of the nutrients contained in organic fertilizers are in an organic state, which is difficult for crops to use directly. Through the action of microorganisms, they slowly release a variety of nutrients and continuously supply nutrients to crops. The application of organic fertilizers can improve soil structure, coordinate water, fertilizer, air, and heat in the soil, and improve soil fertility and land productivity.

[0028] Biological fertilizer generally refers to microbial fertilizer. Microbial fertilizer contains more than ten kinds of highly efficient and active beneficial microorganisms, which are suitable for various crops, can activate nutrients, improve nutrient utilization, and are widely used. It breaks the inherent weaknesses of "specificity", "limitation" and "special fertilizer" of ordinary biological fertilizers, which is unmatched by other biological fertilizers. It can be applied to various types of soil. Generally speaking, any land where plants grow can be applied with microbial fertilizer to improve the soil and reduce the use of chemical fertilizers to promote crop growth. It helps to return the soil to its natural state and balance the pH value of the soil to the level required by the crops.

[0029] The soil conditioner described in the present application can effectively improve the physical and chemical properties of the ash soil in the ash yard of a coal-fired power plant, increase the transport, absorption and utilization rate of the soil in supplying water and nutrients required for plant growth, thereby achieving the purpose of improving the soil structure, increasing humus and preventing wind and sand, and ultimately achieving the goal of improving the soil and restoring vegetation in the ash yard of a coal-fired power plant.

[0030] In some embodiments of the present application, the following raw materials are included in parts by weight: 430-440 parts of potassium humate, 52-56 parts of humic acid, 52-56 parts of Bacterial Fertilizer, 260-268 parts of chelated fertilizer, 520-535 parts of organic fertilizer and 172-176 parts of biological fertilizer.

[0031] In some embodiments of the present application, the following raw materials are included in parts by weight: 435 parts of potassium humate, 55 parts of humic acid, 55 parts of Bacterial Cleaner, 265 parts of chelated fertilizer, 525 parts of organic fertilizer and 175 parts of biological fertilizer.

[0032] An embodiment of the present application also provides a method for preparing the coal-fired power plant ash field soil conditioner described in the first aspect of the present application, comprising the following steps: mixing potassium humate, humic acid, BacteriaClear, chelated fertilizer, organic fertilizer and biological bacterial fertilizer.

[0033] An embodiment of the present application also provides a method for improving the soil in the ash field of a coal-fired power plant, using the coal-fired power plant ash field soil conditioner described in the first aspect of the present application or the coal-fired power plant ash field soil conditioner obtained by the preparation method described in the second aspect of the present application for improvement.

[0034] In some embodiments of the present application, the method for improving the soil in the ash field of a coal-fired power plant comprises the following steps:

[0035] (1) spreading the soil conditioner on the soil to be improved and tilling the soil;

[0036] (2) Planting plants on the tilled soil and spreading the soil conditioner.

[0037] The soil conditioner can be spread on the soil to be improved and then plowed. The soil conditioner can be swirled into the soil so that the deep soil layer comes into contact with the soil conditioner, causing physical and chemical acid-base neutralization, thereby achieving the purpose of supplementing the nutrients of the cultivated layer of soil.

[0038] In some embodiments of the present application, in step (1), the application rate of the soil conditioner is 800-1200 g / m 2 , for example 800g / m 2 , 850g / m 2 , 900g / m 2 , 980g / m 2 1000g / m 2 , 1100g / m 2 , 1200g / m 2 etc., preferably 1000g / m 2 .

[0039] In some embodiments of the present application, the tillage depth is 8-12 cm, such as 8 cm, 9 cm, 10 cm, 11 cm, 12 cm, etc. A tillage depth of 8-12 cm is conducive to breaking up soil compaction and forming a salt-isolating layer.

[0040] In some embodiments of the present application, the plant includes one or more of Agave serrata, Puccinellia tenuifolia, Agropyron spicata, Caragana angustifolia, and Medicago spathulata. The plant species selected in the present application are drought-resistant, salt-tolerant, trample-tolerant, and stress-resistant, and have good adaptability.

[0041] In some embodiments of the present application, the sowing rate of the plant is 42-48 g / m 2 , for example 42g / m 2 , 45g / m 2 , 46g / m 2 , 48g / m 2 The sowing depth of the plant is 1-4 cm, such as 1 cm, 2 cm, 3 cm, 4 cm, etc. There is no spacing between rows and plants during sowing, and the sowing is uniform.

[0042] In some embodiments of the present application, in step (2), the application rate of the soil conditioner is 400-600 g / m 2 , for example 400g / m 2 , 500g / m 2 , 550g / m 2 , 600g / m 2 etc., preferably 500g / m 2 Fertilizing after sowing plant seeds is beneficial to the growth of plants, and the fertilizer provides nutrients for plant growth.

[0043] In some embodiments of the present application, the management and care of plants is also included. Watering is carried out after sowing and fertilization, and then watering is carried out once every 4-5 days to accelerate germination and promote rooting, and then watering is carried out once every 6-7 days to slow down the seedlings. The slow-growing water needs to be watered three times, and the slow-growing period is about 20 days. After slowing down the seedlings, water once every 12-16 days. When the seedling height is 18-24cm, water the tillering and branching water once, and then irrigate and water 1-2 times in time according to the plant moisture content. By the end of October, depending on the weather conditions, irrigate the wintering water. In the second year, in mid-February, depending on the weather conditions, water the green water, water it once every 5 days, and water it three times in total, and then look at the seedlings and soil moisture conditions and topdress and water them in time.

[0044] The plant disease and insect pest control described in this application mainly adopts chemical control methods. Because the diseases generally spread in the ash yard of coal-fired power plants include gray mold, sooty mold, rust, seedling blight, etc., the latest developed comprehensive disease treatment agent Junliqing (low toxicity) 900-1000 times diluted spray can be used for prevention and control, spraying once a week for two consecutive weeks.

[0045] Pests include locusts, aphids, noctuids, loopers, middle-flowered beetles, flower maggots, etc. The newly developed 2.5% highly effective chloranthrin (low toxicity) 700-800 times solution can be sprayed for prevention and control, once a week for two consecutive weeks. If insect marks and lesions are found, the insect population density is high. The newly developed 2.5% highly effective chloranthrin (low toxicity) 500-600 times solution can be sprayed for prevention and control, once a week for three consecutive weeks. If the lesions are visible to the naked eye, the newly developed comprehensive disease treatment agent Junliqing (low toxicity) 600-700 times solution can be sprayed for prevention and control, once a week for three consecutive weeks. From mid-August to mid-October, seeds can be harvested manually when the panicles and pods turn light yellow-brown.

[0046] Potassium humate used in the examples of this application: the brand is Jiayou. The implementation standard is HG / T3276-2012, and the humic acid content is ≥ 20%. The manufacturer is Shandong Quanlin Jiayou Fertilizer Co., Ltd.

[0047] Humic acid: The brand is Fengle, and the humic acid content is ≥30%. Purchased from: Hubei Fengle Ecological Fertilizer Co., Ltd.

[0048] Junliqing: Brand is Nongkang. Dosage form: powder. Purchased from: Shandong Zhonggu Nongkang Fertilizer Co., Ltd.

[0049] Chelated fertilizer: Brand: Ju Nong Tian Yuan. Implementation standard: HG / T4214-2011. Purchased from: PetroChina Northwest Chemical Sales Company.

[0050] Organic fertilizer: The brand is Daxing No. 1, with an organic matter content of ≥ 60%. Purchased from Henan Huahuaniu Group Co., Ltd.

[0051] Biofertilizer: Brand: Tianjin. Implementation standard: NY884-2012, effective live bacteria count: 20 billion / kg. Purchased from: Henan Huahuaniu Group Co., Ltd.

[0052] Example 1

[0053] A soil conditioner for an ash field of a coal-fired power plant comprises the following raw materials in parts by weight: 430 g of potassium humate, 50 g of humic acid, 50 g of Junliqing, 250 g of chelated fertilizer, 500 g of organic fertilizer and 160 g of biological bacterial fertilizer.

[0054] The preparation method of the coal-fired power plant ash field soil conditioner described in Example 1 comprises the following steps: mixing potassium humate, humic acid, Bacteria-free Cleaner, chelated fertilizer, organic fertilizer and biological bacterial fertilizer.

[0055] The soil conditioner described in Example 1 of the present application was spread on the soil to be improved, and the amount of the soil conditioner spread was 800 g / m 2After spreading, the soil was tilled to a depth of 8 cm, and then the soil was sown with plants. The plant sown in this embodiment was flat spike wheatgrass, and the sowing rate of flat spike wheatgrass was 42 g / m 2 , sowing depth is 2cm, then spread soil conditioner, the application rate of soil conditioner is 400g / m 2 .

[0056] After sowing and fertilizing, water the plants, and then water them once every 4 days to promote germination and rooting, and then water them once every 6 days to slow down the growth of seedlings. Water the plants three times for a slow growth period of about 20 days. After the growth of seedlings, water them once every 12 days. When the seedlings are 18 cm tall, water them once for tillering and branching, and then irrigate and water them once according to the soil moisture of the plants. At the end of October, water the plants for wintering, depending on the weather conditions. In the second year, in mid-February, water the plants for greening, and water them once every 5 days for a total of three times. Then, apply fertilizer and water them in time according to the seedling conditions and soil moisture conditions. In the later stage, pesticides can be sprayed according to the pest situation. Pests include locusts, aphids, armyworms, loopers, middle beetles, flower maggots, etc. The newly developed 2.5% highly effective chloranthrin (low toxicity) 700 times solution can be sprayed for prevention and control, once a week for two consecutive weeks. If insect marks and lesions are found, the newly developed 2.5% highly effective chloranthrin (low toxicity) 500 times solution can be sprayed for prevention and control, once a week for three consecutive weeks. If lesions are visible to the naked eye, the newly developed comprehensive disease treatment agent Junliqing (low toxicity) 600 times solution can be sprayed for prevention and control, once a week for three consecutive weeks. From mid-August to mid-October, seeds can be harvested manually.

[0057] Example 2

[0058] A soil conditioner for an ash field of a coal-fired power plant comprises the following raw materials in parts by weight: 435 g of potassium humate, 55 g of humic acid, 55 g of Junliqing, 265 g of chelated fertilizer, 525 g of organic fertilizer and 175 g of biological bacterial fertilizer.

[0059] The preparation method of the coal-fired power plant ash field soil conditioner described in Example 2 includes the following steps: mixing potassium humate, humic acid, Bacteria-free Cleaner, chelated fertilizer, organic fertilizer and biological bacterial fertilizer.

[0060] The soil conditioner described in Example 2 of the present application was spread on the soil to be improved, and the amount of the soil conditioner spread was 1000 g / m 2 After spreading, the soil was tilled to a depth of 10 cm, and then the soil was sown with plants. The plant sown in this embodiment was Saladinium sphaerocephalum, and the sowing rate of Saladinium sphaerocephalum was 45 g / m 2 , sowing depth is 2cm, then spread soil conditioner, the application rate of soil conditioner is 500g / m 2 .

[0061] After sowing and fertilizing, water the plants, and then water them once every 5 days to promote germination and rooting, and then water them once every 6 days to slow down the growth of seedlings. Water the seedlings three times, and the slow growth period is about 20 days. Water the seedlings once every 13 days after the slow growth of seedlings. When the seedlings are 20 cm tall, water them once for tillering and branching, and then irrigate and water them twice according to the moisture content of the plants. At the end of October, depending on the weather conditions, water the plants for wintering. In the second year, in mid-February, depending on the weather conditions, water the plants for greening, and water them once every 5 days for a total of three times. After that, topdress and water them according to the seedling conditions and soil moisture conditions. In the later stage, pesticides can be sprayed according to the pest situation. Pests include locusts, aphids, armyworms, loopers, middle beetles, flower maggots, etc. The newly developed 2.5% highly effective chloranthrin (low toxicity) 700 times solution can be sprayed for prevention and control, once a week for two consecutive weeks. If insect marks and lesions are found, the newly developed 2.5% highly effective chloranthrin (low toxicity) 500 times solution can be sprayed for prevention and control, once a week for three consecutive weeks. If lesions are visible to the naked eye, the newly developed comprehensive disease treatment agent Junliqing (low toxicity) 600 times solution can be sprayed for prevention and control, once a week for three consecutive weeks. From mid-August to mid-October, seeds can be harvested manually.

[0062] Example 3

[0063] A soil conditioner for an ash field of a coal-fired power plant comprises the following raw materials in parts by weight: 450 g of potassium humate, 60 g of humic acid, 60 g of Junliqing, 270 g of chelated fertilizer, 550 g of organic fertilizer and 180 g of biological bacterial fertilizer.

[0064] The preparation method of the coal-fired power plant ash field soil conditioner described in Example 3 includes the following steps: mixing potassium humate, humic acid, Bacteria-free Cleaner, chelated fertilizer, organic fertilizer and biological bacterial fertilizer.

[0065] The soil conditioner described in Example 3 of the present application was spread on the soil to be improved, and the amount of the soil conditioner spread was 1200 g / m 2 After spreading, the soil was tilled to a depth of 12 cm, and then the plant was sown on the tilled soil. The plant sown in this embodiment was Caragana angustifolia, and the sowing rate of Caragana angustifolia was 48 g / m 2 , sowing depth is 4cm, then spread soil conditioner, the application rate of soil conditioner is 600g / m 2 .

[0066] After sowing and fertilizing, water the plants, and then water them once every 5 days to promote germination and rooting, and then water them once every 7 days to slow down the growth of seedlings. Water the seedlings three times, and the slow growth period is about 20 days. After the slow growth of seedlings, water them once every 16 days. When the seedlings are 24 cm tall, water them once for tillering and branching, and then irrigate and water them twice according to the moisture content of the plants. At the end of October, water the plants for wintering, depending on the weather conditions. In the second year, in mid-February, water the plants for greening, and water them once every 5 days for a total of three times. After that, topdress and water them according to the seedling conditions and soil moisture conditions. In the later stage, pesticides can be sprayed according to the pest situation. Pests include locusts, aphids, armyworms, loopers, middle beetles, flower maggots, etc. The newly developed 2.5% highly effective chloranthrin (low toxicity) 700 times solution can be sprayed for prevention and control, once a week for two consecutive weeks. If insect marks and lesions are found, the newly developed 2.5% highly effective chloranthrin (low toxicity) 500 times solution can be sprayed for prevention and control, once a week for three consecutive weeks. If lesions are visible to the naked eye, the newly developed comprehensive disease treatment agent Junliqing (low toxicity) 600 times solution can be sprayed for prevention and control, once a week for three consecutive weeks. From mid-August to mid-October, seeds can be harvested manually.

[0067] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A soil conditioner for coal-fired power plant ash field, characterized in that: The invention comprises the following raw materials in parts by weight: 430-450 parts of potassium humate, 50-60 parts of humic acid, 50-60 parts of Junliqing, 250-270 parts of chelated fertilizer, 500-550 parts of organic fertilizer and 160-180 parts of biological bacterial fertilizer.

2. The coal-fired power plant ash field soil conditioner according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 430-440 parts of potassium humate, 52-56 parts of humic acid, 52-56 parts of Junliqing, 260-268 parts of chelated fertilizer, 520-535 parts of organic fertilizer and 172-176 parts of biological bacterial fertilizer.

3. The coal-fired power plant ash field soil conditioner according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 435 parts of potassium humate, 55 parts of humic acid, 55 parts of Junliqing, 265 parts of chelated fertilizer, 525 parts of organic fertilizer and 175 parts of biological bacterial fertilizer.

4. The method for preparing the soil conditioner for coal-fired power plant ash field according to any one of claims 1 to 3, characterized in that: The following steps are involved: Mix potassium humate, humic acid, BacteriaClear, chelated fertilizer, organic fertilizer and biological fertilizer.

5. A method for improving the soil in the ash field of a coal-fired power plant, characterized in that: The improvement is carried out by using the coal-fired power plant ash field soil conditioner according to any one of claims 1 to 3 or the coal-fired power plant ash field soil conditioner obtained by the preparation method according to claim 4.

6. The method for improving the soil in the ash field of a coal-fired power plant according to claim 5, characterized in that: The following steps are involved: (1) spreading the soil conditioner on the soil to be improved and tilling the soil; (2) Planting plants on the tilled soil and spreading the soil conditioner.

7. The method for improving the soil in the ash field of a coal-fired power plant according to claim 6, characterized in that: In step (1), the application amount of the soil conditioner is 800-1200g / m 2 , preferably 1000g / m 2 ; And / or, the tillage depth is 8-12 cm.

8. The method for improving the soil in the ash field of a coal-fired power plant according to claim 6, characterized in that: The plants include one or more of Agave serrata, Puccinellia tenuifolia, Agropyron truncatum, Caragana angustifolia, Sophora alopecuroides, and Medicago truncatula.

9. The method for improving the soil in the ash field of a coal-fired power plant according to claim 6, characterized in that: The sowing rate of the plant is 42-48g / m 2 , the sowing depth of the plants is 1-4 cm.

10. The method for improving the soil in the ash field of a coal-fired power plant according to claim 6, characterized in that: In step (2), the application rate of the soil conditioner is 400-600g / m 2 , preferably 500g / m 2 .