Soil conditioning fertilizer and preparation method thereof

Abstract

The invention relates to the technical field of soil conditioners, and particularly provides a soil conditioning fertilizer and a preparation method thereof. The soil conditioning fertilizer comprises the following components in parts by weight: 1-3 parts of a high-entropy nano material, 12-16 parts of humic acid, 40-50 parts of attapulgite ore, 2-4 parts of konjac, 0.4-0.8 part of an amino acid mixture, 1-3 parts of calcium peroxide, 2-4 parts of plant ash and 0.4-0.6 part of alkyl glycoside. The high-entropy nano material can reduce the influence of environmental stress on plants and effectively improve the overall growth condition of the plants, meanwhile, the attapulgite ore is introduced to improve the growth environment of the plants, calcium peroxide releases oxygen when being slowly decomposed in soil, respiration and nutrient absorption of root systems are facilitated, all the components of the conditioning agent coordinate with one another, and the conditioning effect is good. The growth and development of plants are jointly promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of soil conditioners, and particularly relates to a soil conditioning fertilizer and a preparation method thereof. Background Art

[0002] With the continuous development of agricultural production, the problems of soil degradation and fertility decline have become increasingly serious, becoming one of the main bottlenecks restricting the sustainable development of agriculture. Soil degradation includes physical, chemical, and biological degradation, manifested as deteriorated soil structure, nutrient loss, accumulation of harmful substances, etc. In order to improve soil fertility and improve soil structure, scientists have developed various types of soil conditioning fertilizers. Traditional soil conditioning fertilizers mostly use single or a few elements as the main components. Although they can meet the needs of soil improvement to a certain extent, their performance is often limited by the single component, and it is difficult to comprehensively and effectively improve the physical, chemical, and biological properties of the soil.

[0003] At present, the research and application of soil conditioning fertilizers still face many challenges and problems. First, the application of traditional fertilizers is likely to cause problems such as soil acidification and salinization. Long-term use may damage the soil ecological balance, resulting in deteriorated soil structure and hardening. Second, single-component fertilizers often cannot meet the multiple nutrient requirements for plant growth, which may lead to nutrient imbalance and affect the growth and development of crops. In addition, the existing soil conditioning fertilizers have limited effects in improving the soil physical structure and microbial environment, and it is difficult to achieve comprehensive soil improvement. The problems of heavy metal pollution and pesticide residues are also difficult to be effectively controlled by traditional fertilizers, further restricting the sustainable development of agricultural production. Therefore, there is an urgent need for a multi-functional, efficient, and environmentally friendly soil conditioning fertilizer to comprehensively improve soil quality and agricultural production efficiency.

[0004] With the development of materials science, high-entropy nanomaterials have received extensive attention due to their unique structure and multi-functionality. High-entropy nanomaterials refer to alloy or composite nanomaterials composed of multiple (metal or non-metal) elements, characterized by diverse components, stable structure, and excellent performance, providing a new solution for soil improvement. Summary of the Invention

[0005] In view of the above situation, to overcome the defects of the prior art, the present invention provides a soil conditioning fertilizer and a preparation method thereof, adding materials such as high-entropy nanomaterials, attapulgite ore, and calcium peroxide into the soil conditioning fertilizer, significantly promoting the growth and development of plants.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows: The present invention provides a soil-conditioning fertilizer, which comprises the following components in parts by weight: 1-3 parts of high-entropy nanomaterial, 12-16 parts of humic acid, 40-50 parts of attapulgite ore, 2-4 parts of konjac, 0.4-0.8 part of amino acid mixture, 1-3 parts of calcium peroxide, 2-4 parts of plant ash, and 0.4-0.6 part of alkyl polyglycoside.

[0007] Preferably, the preparation method of the high-entropy nanomaterial comprises the following steps: ① Mix Al(NO3)3·9H2O, Mn(NO3)2⋅9H2O, Cu(NO3)2⋅6H2O, Fe(NO3)3⋅9H2O, and Zn(NO3)2⋅6H2O in an equimolar ratio in ethanol, stir for 30 min to dissolve and mix evenly to obtain a mixed ion solution; ② Place the mixed ion solution prepared in step ① in an oven and dry it at 60-80°C for 2-4 h to remove ethanol, forming a high-entropy oxide precursor; ③ Evacuate the tubular furnace and introduce argon to remove impurities. Place the high-entropy oxide precursor obtained in step ② on one side of the quartz tube, and place the tubular furnace on the other side of the quartz tube. After the tubular furnace is heated to 800-850°C, move the tubular furnace to the side containing the high-entropy oxide precursor, maintain the temperature at 700°C and calcine for 2 h, and cool to room temperature to obtain (AlMnCuFeZn)O high-entropy oxide; ④ Dissolve 1.5-2 mmol of NaBH4 and 0.5-1 mmol of selenium powder in 2 mL of deionized water, then add 30 mL of ethanol and mix evenly. Continue to add 400-600 mg of the (AlMnCuFeZn)O high-entropy oxide prepared in step ③, mix evenly and put it into a high-pressure reaction kettle with a polytetrafluoroethylene inner lining, transfer it to an oven and heat it to 140-150°C for 12 h. After cooling to room temperature, wash the product three times alternately with deionized water and ethanol, and then dry it in a vacuum drying oven at 40-60°C for 6-12 h to obtain the high-entropy nanomaterial.

[0008] Preferably, the dosage ratio of Al(NO3)3·9H2O to ethanol in step ① is 4-6 mmol: 30 mL.

[0009] Preferably, the amino acid mixture comprises the following components in parts by weight: 4-6 parts of glycine, 4-6 parts of alanine, 4-6 parts of glutamic acid, 4-6 parts of aspartic acid, 1-2 parts of lysine, 1-2 parts of histidine, and 1-2 parts of arginine.

[0010] The present invention also provides a preparation method of the soil-conditioning fertilizer, which specifically comprises the following steps: S1. Weigh high entropy nanomaterials, humic acid, attapulgite, konjac, amino acid mixture, calcium peroxide, wood ash and alkyl polyglycoside by weight, add them into a mixer, mix them thoroughly to evenly distribute the ingredients, obtain soil conditioning fertilizer, and package them into sealed bags to avoid moisture.

[0011] The beneficial effects achieved by the present invention are as follows: The present invention prepares a multifunctional, efficient and environmentally friendly soil conditioning fertilizer by introducing high entropy nanomaterials, humic acid, attapulgite, konjac, amino acid mixture, calcium peroxide, plant ash and alkyl glycoside and other ingredients, which has significant beneficial effects. Due to its high surface area and porous structure, the high entropy nanomaterial can effectively improve the physical structure of the soil, increase the porosity and air permeability of the soil, and the various elements in the high entropy nanomaterial can work synergistically to enhance the stress resistance and antioxidant capacity of the plant, reduce the impact of environmental stress on the plant, and effectively improve the overall growth of the plant. The porous structure of the attapulgite ore preferentially adsorbs free heavy metal ions in the soil, and the surface active sites of the high entropy nanomaterial convert the heavy metals into low-mobility forms through redox reactions. Humic acid further stabilizes the heavy metal-high entropy material complex through carboxyl / phenolic hydroxyl chelation, forming an adsorption-catalysis-chelation three-level barrier, and reducing the biological effectiveness of heavy metals. In addition, the humic acid and amino acid mixture provide a rich organic matter and nitrogen source for soil microorganisms, promote the growth of beneficial microorganisms, and enhance the biological activity of the soil. The heavy metal adsorption capacity of attapulgite, the acid-base regulation function of wood ash, and the water-retention performance of konjac further optimize the soil environment, allowing plants to grow in healthier soil, thereby improving the growth of crops. Calcium peroxide releases oxygen when it slowly decomposes in the soil, which helps the respiration and nutrient absorption of the root system, while improving the aeration of the soil and providing calcium to promote plant development. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 is a scanning electron microscope image of the high entropy nanomaterial prepared in Example 1; Figure 2 This is the full XPS spectrum of the high entropy nanomaterial prepared in Example 1; Figure 3 It is the appearance picture of the spinach cultivated by fertilization of Example 1 and Comparative Example 1-2; Figure 4It is a diagram of the roots of spinach cultivated by applying fertilizers in Example 1 and Comparative Examples 1-2. Detailed implementation mode

[0014] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments. However, the present invention is not limited to the following embodiments.

[0015] It should be noted that unless otherwise specified, the chemical reagents involved in the present invention are all purchased through commercial channels.

[0016] Example 1: In this example, a soil-conditioning fertilizer is proposed. The soil-conditioning fertilizer includes the following components in parts by weight: 2 parts of high-entropy nanomaterials, 16 parts of humic acid, 45 parts of attapulgite ore, 4 parts of konjac, 0.6 part of amino acid mixture, 2 parts of calcium peroxide, 4 parts of plant ash, and 0.4 part of alkyl polyglycoside.

[0017] The preparation method of the high-entropy nanomaterials includes the following steps: ①. Weigh 5 mmol of Al(NO3)3·9H2O, Mn(NO3)2⋅9H2O, Cu(NO3)2⋅6H2O, Fe(NO3)3⋅9H2O, and Zn(NO3)2⋅6H2O respectively and mix them in 30 mL of ethanol. Stir for 30 min to dissolve and mix evenly to obtain a mixed ion solution. ②. Place the mixed ion solution prepared in step ① in an oven and dry it at 80°C for 2 h to remove ethanol, forming a high-entropy oxide precursor. ③. Evacuate the tubular furnace and introduce argon to eliminate impurities. Place the high-entropy oxide precursor obtained in step ② on one side of the quartz tube, and place the tubular furnace on the other side of the quartz tube. After the tubular furnace is heated to 800°C, move the tubular furnace to the side containing the high-entropy oxide precursor, and calcine at 700°C for 2 h. After cooling to room temperature, obtain (AlMnCuFeZn)O high-entropy oxide. ④. Dissolve 2 mmol of NaBH4 and 1 mmol of selenium powder in 2 mL of deionized water, then add 30 mL of ethanol and mix evenly. Continue to add 500 mg of the (AlMnCuFeZn)O high-entropy oxide prepared in step ③, mix evenly and put it into a high-pressure reaction kettle with a polytetrafluoroethylene inner lining, transfer it to an oven and heat it to 140°C and keep it for 12 h. After cooling to room temperature, wash the product three times alternately with deionized water and ethanol, and then dry it in a vacuum drying oven at 60°C for 6 h to obtain high-entropy nanomaterials.

[0018] The amino acid mixture includes the following components in parts by weight: 4 parts of glycine, 6 parts of alanine, 6 parts of glutamic acid, 4 parts of aspartic acid, 1 part of lysine, 2 parts of histidine, and 2 parts of arginine.

[0019] This embodiment also provides a method for preparing a soil conditioning fertilizer, which specifically comprises the following steps: S1. Weigh high entropy nanomaterials, humic acid, attapulgite, konjac, amino acid mixture, calcium peroxide, wood ash and alkyl polyglycoside by weight, add them into a mixer, mix them thoroughly to evenly distribute the ingredients, obtain soil conditioning fertilizer, and package them into sealed bags to avoid moisture.

[0020] Example 2: This example proposes a soil conditioning fertilizer, which includes the following components in parts by weight: 1 part of high-entropy nanomaterial, 12 parts of humic acid, 50 parts of attapulgite ore, 3 parts of konjac, 0.8 parts of amino acid mixture, 3 parts of calcium peroxide, 2 parts of wood ash and 0.5 parts of alkyl glycoside.

[0021] The method for preparing the high entropy nanomaterial comprises the following steps: ①, weigh 4 mmol of Al(NO3)3·9H2O, Mn(NO3)2⋅9H2O, Cu(NO3)2⋅6H2O, Fe(NO3)3⋅9H2O and Zn(NO3)2⋅6H2O, mix them in 30 mL of ethanol, stir for 30 min to dissolve and mix evenly, and obtain a mixed ion solution; ②, placing the mixed ion solution prepared in step ① in an oven at 70°C for 3 h to remove ethanol, thereby forming a high entropy oxide precursor; ③, evacuate the tube furnace, introduce argon gas to eliminate impurities, place the high entropy oxide precursor obtained in step ② on one side of the quartz tube, and place the tube furnace on the other side of the quartz tube. After the tube furnace is heated to 850°C, move the tube furnace to the side containing the high entropy oxide precursor, keep the temperature at 700°C and calcine for 2 h, and cool to room temperature to obtain (AlMnCuFeZn)O high entropy oxide; ④. Dissolve 1.5 mmol NaBH4 and 0.5 mmol selenium powder in 2 mL deionized water, then add 30 mL ethanol and mix well. Continue to add 600 mg of (AlMnCuFeZn)O high entropy oxide prepared in step ③, mix well and put into a high-pressure reactor with a polytetrafluoroethylene liner, transfer to an oven and heat to 150°C for 12 h. After cooling to room temperature, wash the product alternately with deionized water and ethanol three times, and then dry it in a vacuum drying oven at 50°C for 8 h to obtain a high entropy nanomaterial.

[0022] The amino acid mixture comprises the following components in parts by weight: 6 parts of glycine, 5 parts of alanine, 5 parts of glutamic acid, 6 parts of aspartic acid, 2 parts of lysine, 2 parts of histidine, and 2 parts of arginine.

[0023] This embodiment also provides a method for preparing a soil conditioning fertilizer, which specifically comprises the following steps: S1. Weigh high entropy nanomaterials, humic acid, attapulgite, konjac, amino acid mixture, calcium peroxide, wood ash and alkyl polyglycoside by weight, add them into a mixer, mix them thoroughly to evenly distribute the ingredients, obtain soil conditioning fertilizer, and package them into sealed bags to avoid moisture.

[0024] Example 3: This example proposes a soil conditioning fertilizer, which includes the following components in parts by weight: 3 parts of high-entropy nanomaterials, 14 parts of humic acid, 40 parts of attapulgite ore, 2 parts of konjac, 0.4 parts of amino acid mixture, 1 part of calcium peroxide, 3 parts of wood ash and 0.6 parts of alkyl glycoside.

[0025] The method for preparing the high entropy nanomaterial comprises the following steps: ①, weigh 6 mmol of Al(NO3)3·9H2O, Mn(NO3)2⋅9H2O, Cu(NO3)2⋅6H2O, Fe(NO3)3⋅9H2O and Zn(NO3)2⋅6H2O, mix them in 30 mL of ethanol, stir for 30 min to dissolve and mix evenly, and obtain a mixed ion solution; ②, placing the mixed ion solution prepared in step ① in an oven at 60°C for 4 h to remove ethanol, thereby forming a high entropy oxide precursor; ③, the tube furnace is evacuated, and argon gas is introduced to eliminate impurities, the high entropy oxide precursor obtained in step ② is placed on one side of the quartz tube, and the tube furnace is placed on the other side of the quartz tube. After the tube furnace is heated to 820°C, the tube furnace is moved to the side containing the high entropy oxide precursor, and the temperature is maintained at 700°C for calcination for 2 h. After cooling to room temperature, (AlMnCuFeZn)O high entropy oxide is obtained; ④. Dissolve 1.8 mmol NaBH4 and 0.8 mmol selenium powder in 2 mL deionized water, then add 30 mL ethanol and mix well. Continue to add 400 mg of (AlMnCuFeZn)O high entropy oxide prepared in step ③, mix well and put into a high-pressure reactor with a polytetrafluoroethylene liner, transfer to an oven and heat to 146 °C for 12 h. After cooling to room temperature, wash the product alternately with deionized water and ethanol three times, and then dry it in a vacuum drying oven at 40 °C for 12 h to obtain a high entropy nanomaterial.

[0026] The amino acid mixture comprises the following components in parts by weight: 5 parts of glycine, 4 parts of alanine, 4 parts of glutamic acid, 5 parts of aspartic acid, 2 parts of lysine, 1 part of histidine and 1 part of arginine.

[0027] This embodiment also provides a method for preparing a soil conditioning fertilizer, which specifically comprises the following steps: S1. Weigh the high-entropy nanomaterials, humic acid, attapulgite ore, konjac, amino acid mixture, calcium peroxide, plant ash, and alkyl polyglycoside by weight parts, add them to a mixer, and mix well to make the components evenly distributed, obtaining a soil conditioner fertilizer. Then pack it into a sealed bag to avoid moisture absorption.

[0028] Comparative Example 1: A soil conditioner fertilizer is proposed in this comparative example. The difference from Example 1 is only that attapulgite ore and calcium peroxide are not added, and the other components, component contents, and experimental steps are the same as those in Example 1.

[0029] Comparative Example 2: A soil conditioner fertilizer is proposed in this comparative example. The difference from Example 1 is only that high-entropy nanomaterials are not added, and the other components, component contents, and experimental steps are the same as those in Example 1.

[0030] Experimental Example 1: Observe the microscopic morphology of the high-entropy nanomaterials prepared in Example 1 using a scanning electron microscope, and further analyze the elemental composition of the high-entropy nanomaterials using X-ray photoelectron spectroscopy.

[0031] Figure 1 This is the scanning electron microscope image of the high-entropy nanomaterials prepared in Example 1. As shown in the figure, the high-entropy nanomaterials are spherical in shape with a diameter of about 500 nm. Figure 2 This is the full XPS spectrum of the high-entropy nanomaterials prepared in Example 1. As shown in the figure, the high-entropy nanomaterials contain Zn, Cu, Fe, Mn, Al, and Se elements, indicating the successful preparation of the high-entropy nanomaterials.

[0032] Experimental Example 2: To verify the regulation of the soil conditioner on the soil and crops, a planting experiment was carried out in a test field in Dongpo District, Meishan City. Dongpo District belongs to the subtropical humid climate zone, with no severe cold in winter, no intense heat in summer, few frosts and snows, distinct seasons, abundant rainfall, and rich light and temperature resources. The average annual temperature is 17.2 °C, the frost-free period is 318 days, the average annual rainfall is 1057.5 mm, and the average annual sunshine hours are 1193.8 hours. Spinach grown locally in Meishan was used as the test object. The land was prepared, weeded, and plowed from December 1st to December 18th in winter. On December 19th, the base fertilizer was applied to the test field (the experimental example 1 and comparative examples 1-2 were applied separately). Spinach was sown on December 20th and harvested on April 7th of the following year. The growth status of spinach was analyzed, and the traits such as plant height, root length, plant weight, and root weight of spinach were measured. The test data are shown in Table 1. Table 1 Test Data

[0033] Figure 3 This is the appearance diagram of the spinach cultivated by applying the fertilizers in Example 1 and Comparative Examples 1-2. Figure 4 This is the root diagram of the spinach cultivated by applying the fertilizers in Example 1 and Comparative Examples 1-2. According to Figure 3-4As shown in Table 1, the spinach cultivated in Example 1 grew well, with a large number of leaves, plump and healthy leaves, well-developed roots, long and thick roots, showing a good growth state; the spinach plants cultivated in Comparative Example 1 grew poorly, with a small number of leaves, sparse and small leaves, fewer roots, long and thin roots, showing a poor growth state. The growth of the spinach plants cultivated in Comparative Example 2 was between that of Example 1 and Comparative Example 1, indicating that the high-entropy nanomaterials can effectively promote plant growth, and attapulgite ore and calcium peroxide can further promote plant development and improve the growth conditions of plants.

[0034] The above description of the present invention and its implementation manners is not restrictive, and the actual application is not limited thereto. In general, if those of ordinary skill in the art are inspired by it and design similar ways and embodiments to this technical solution without creative efforts without departing from the purpose of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. A soil regulating fertilizer, characterized in that, The soil conditioning fertilizer comprises the following components in parts by weight: 1-3 parts of high entropy nanomaterials, 12-16 parts of humic acid, 40-50 parts of attapulgite, 2-4 parts of konjac, 0.4-0.8 parts of amino acid mixture, 1-3 parts of calcium peroxide, 2-4 parts of wood ash and 0.4-0.6 parts of alkyl glycoside.

2. The soil-conditioning fertilizer according to claim 1, wherein The method for preparing the high entropy nanomaterial comprises the following steps: ①, Al(NO3)3·9H2O, Mn(NO3)2⋅9H2O, Cu(NO3)2⋅6H2O, Fe(NO3)3⋅9H2O and Zn(NO3)2⋅6H2O are mixed in ethanol in equal molar proportions, stirred to dissolve and mix evenly to obtain a mixed ion solution; ②, drying the mixed ion solution prepared in step ① to remove ethanol, thereby forming a high entropy oxide precursor; ③, evacuate the tube furnace, introduce argon gas to eliminate impurities, place the high entropy oxide precursor obtained in step ② on one side of the quartz tube, and place the tube furnace on the other side of the quartz tube. After the tube furnace is heated to 800-850°C, move the tube furnace to the side containing the high entropy oxide precursor, keep the temperature at 700°C and calcine for 2 h, and cool to room temperature to obtain (AlMnCuFeZn)O high entropy oxide; ④. Dissolve NaBH4 and selenium powder in deionized water, then add ethanol and mix well, continue to add the (AlMnCuFeZn)O high entropy oxide prepared in step ③, mix well and put into a high-pressure reactor with a polytetrafluoroethylene liner, heat to 140-150℃ and keep for 12 h, cool to room temperature, wash the product, and dry to obtain a high entropy nanomaterial.

3. The soil conditioning fertilizer according to claim 2, wherein The amino acid mixture comprises the following components in parts by weight: 4-6 parts of glycine, 4-6 parts of alanine, 4-6 parts of glutamic acid, 4-6 parts of aspartic acid, 1-2 parts of lysine, 1-2 parts of histidine, and 1-2 parts of arginine.

4. A preparation method of the soil conditioning fertilizer according to any one of claims 1-3, characterized in that, The specific steps include: S1. Weigh high entropy nanomaterials, humic acid, attapulgite, konjac, amino acid mixture, calcium peroxide, wood ash and alkyl polyglycoside by weight, add them into a mixer, mix them thoroughly to evenly distribute the ingredients, obtain soil conditioning fertilizer, and package them into sealed bags to avoid moisture.

Images