Medium trace element soil conditioner containing atomic copper

Abstract

The invention relates to the technical field of soil improvement, and particularly discloses a medium trace element soil conditioner containing atomic copper. Transition metals Cu, Fe, Zn and Mn are anchored on defect sites on the surface of a nano silicon dioxide carrier in a monatomic form to obtain monatomic compound powder, the monatomic compound powder and auxiliary components are mixed, crushed, ground, calcined, granulated and dried, and the medium trace element soil conditioner containing atomic copper is obtained. The soil conditioner solves the problems that in the prior art, medium trace elements are difficult to absorb and utilize by plants, the utilization rate is low, and soil cannot be improved for a long time, the cost is reduced, the utilization rate is increased, heavy metal pollution is reduced, meanwhile, a new way is opened up for resource utilization of industrial and agricultural wastes in the field of soil improvement and treatment, and the soil conditioner is worthy of popularization and application. The effects of sterilizing, resisting diseases, regulating crop growth, increasing crop yield and improving crop quality are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of soil improvement, in particular to a medium and trace element soil improver containing atomic copper. Background Art

[0002] At present, in the field of agricultural planting, people apply a large amount of fertilizers, pesticides, herbicides, insecticides and other substances to the soil, resulting in a serious imbalance in the nutrient content of the soil in the agricultural cultivation area. At the same time, soil acidification will accelerate the decline of soil acidity and the leaching of elements, making the soil barren. This will reduce the quality of crop products, and in severe cases may even cause plant poisoning and death, seriously damaging the natural ecological environment and greatly endangering human health.

[0003] With the extensive promotion and use of nitrogen, phosphorus and potassium fertilizers, the lack of trace elements in the soil has become increasingly serious. This situation has caused a series of problems in the field planting process, such as crop deficiency symptoms, poor disease and stress resistance of plants, and obstacles to continuous cropping. At the same time, problems such as soil salinization and compaction will also occur, resulting in a large lack of trace elements and organic matter in the soil, causing the effect of chemical fertilizers to decrease year by year, and the application amount to increase year by year, which has increased the activity of heavy metals in the soil, making the soil permeability worse, heavy metals exceeding the standard, bacterial imbalance, and microbial death. These problems seriously restrict the healthy development of agriculture.

[0004] Existing medium and trace element soil conditioners are generally added to fertilizers in the form of inorganic salts or applied directly to the soil. Due to the antagonism between some elements, chemical reactions between each other, and the interaction of various ions in the soil, most of the added trace elements are fixed in the soil, generating water-insoluble inorganic salts, which are difficult to be absorbed and utilized by crops, and also cause heavy metal pollution in the soil. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a medium and trace element soil conditioner containing atomic copper, in order to solve the problems in the prior art that the medium and trace elements are difficult to be absorbed and utilized by plants, the utilization rate is low, and the soil cannot be improved in a long term, so as to improve the soil structure, achieve the effective utilization of the medium and trace elements while reducing the use cost, reduce heavy metal pollution, improve crop sterilization, regulate crop growth, increase production, and improve crop quality.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A medium and trace element soil conditioner containing atomic copper is prepared from the following raw materials in parts by weight: 50-60 parts of single-atom composite powder, 10-30 parts of silicon-based non-metallic materials, 10-20 parts of oyster shells, 10-20 parts of light-burned magnesium powder, 5-10 parts of bentonite, 6-12 parts of attapulgite powder, 0.5-2 parts of sodium hydroxide, 3-7 parts of sugar ether liquid, and 5-10 parts of water.

[0008] A medium-trace element soil conditioner containing atomic copper, the preparation process of the medium-trace element soil conditioner containing atomic copper is as follows:

[0009] S1: Weigh 50-60 parts of monatomic composite powder, 10-30 parts of silicon-based non-metallic material, 10-20 parts of oyster shell, 10-20 parts of light-burned magnesium powder, 5-10 parts of bentonite, 6-12 parts of attapulgite powder, 0.5-2 parts of sodium hydroxide, 3-7 parts of sugar ether liquid, and 5-10 parts of water according to weight parts, and set aside;

[0010] S2: Mix and crush the single-atom composite powder, silicon-based non-metallic material, oyster shell, light-burned magnesium powder and bentonite, grind to 120-200 mesh, then sieve, add water to form 8 mm balls and dry to obtain raw material balls;

[0011] S3: adding the raw material balls into a rotary calcining furnace, calcining for 30-50 min at a temperature of 1200-1300° C. and a pressure of 0.9-1 Pa to obtain clinker;

[0012] S4: quenching the clinker with water and drying it to obtain a solid particle product;

[0013] S5: grinding the solid granular product to 100-180 mesh, sieving, and obtaining a powdery mixture;

[0014] S6: Add attapulgite powder, sodium hydroxide, sugar ether liquid and water to the powdery mixture, mix and stir evenly, then add it to a granulator for granulation, and finally dry it through a drum dryer to obtain the medium and trace element soil conditioner containing atomic copper.

[0015] As a further solution of the present invention: the silicon-based non-metallic material is one of quartz, river sand, silicon dioxide, and silicate.

[0016] As a further solution of the present invention: the single-atom composite powder is obtained by anchoring transition metals in the form of single atoms at defect sites on the surface of the nano-silicon dioxide carrier.

[0017] As a further solution of the present invention: the source of the transition metal is an aqueous solution of metal sulfate.

[0018] As a further solution of the present invention: the mass ratio of the transition metal to the nano-silicon dioxide carrier is 1:20-1:250.

[0019] As a further solution of the present invention: the preparation method of the single-atom composite powder comprises the following steps:

[0020] A1: Preparation of nano-silica carrier by chemical precipitation method;

[0021] A2: 20-25 mL of 5-8% ammonia solution was added dropwise to 500 mL of 20 g / L metal sulfate aqueous solution at a rate of 20-25 μL / s, and the mixture was stirred for 3-5 h at a stirring rate of 500-600 r / min. The mixture was heated to 65-70°C within 35-40 min and stirred for 3-5 h. After stirring, the mixture was cooled to room temperature to obtain a metal coordination precursor solution.

[0022] A3: Add the metal coordination precursor solution to the nano-silica carrier, wherein the mass ratio of the transition metal to the nano-silica carrier is 1:20-1:200, and ultrasonically disperse for 30-50 minutes at an ultrasonic dispersion frequency of 100-120kHz, then mix and stir for 10-16 hours at a stirring rate of 500-800r / min, then wash with water until neutral, filter, dry, and ball mill for 0.5-3 hours at a rotation speed of 100-600r / min to obtain a solid powder;

[0023] A4: Heat the solid powder at 600-800°C for 10-20 hours under air flow, then cool to room temperature, and ball mill for 20-60 minutes at a rotation speed of 200-800 r / min to obtain a single-atom composite powder.

[0024] As a further solution of the present invention: the molar ratio of transition metals in the aqueous solution of metal sulfate described in step A2 is Cu:Fe:Zn:Mn=2:1:1:0.5.

[0025] As a further solution of the present invention: the preparation method of the nano-silicon dioxide carrier comprises the following steps:

[0026] B1: Ethanol and water are mixed in a volume ratio of 1:8 to prepare an ethanol aqueous solution, a certain amount of sodium silicate is weighed and dissolved in the ethanol aqueous solution to prepare a sodium silicate solution with a concentration of 0.4 mol / L, and then 0.5 g of a cationic surfactant hexadecyltrimethylammonium bromide is added, and ultrasonic dispersion is performed at an ultrasonic dispersion frequency of 80-100 kHz for 8-10 minutes to obtain a mixed solution;

[0027] B2: Prepare 100 mL of ammonium chloride solution with a concentration of 1.5 mol / L, and drip the mixed solution into the ammonium chloride solution at a speed of 100 μL / s at a temperature of 40-50°C and a stirring rate of 400-500 r / min until the pH reaches 8.5, and then continue stirring for 1.5-2 h to obtain a precipitate;

[0028] B3: The precipitate is centrifuged and washed with an ethanol aqueous solution containing hexadecyltrimethylammonium bromide, and then placed in a drying oven and dried at a temperature of 100-150° C. to obtain a solid powder;

[0029] B4: The solid powder is added into a muffle furnace, calcined at a temperature of 500-800° C. for 4-8 hours, and then ball-milled to a powder particle size of 80-100 nm to obtain the nano-silicon dioxide carrier.

[0030] Beneficial effects of the present invention:

[0031] The medium and trace element soil improver containing atomic copper of the present invention is prepared by preparing a single-atom composite powder and other auxiliary components. The single-atom composite powder is prepared by adopting single-atom technology, and is obtained by anchoring an aqueous solution of metal sulfate in the form of single atoms on the surface defect sites of a nano-silicon dioxide carrier. The trace elements of Cu, Fe, Zn and Mn contained in the aqueous solution of the metal sulfate finally exist in a monomer atomic state, and compared with the copper sulfate, iron sulfate, zinc sulfate and manganese sulfate contained in the traditional medium and trace element soil improver, no ion clusters and lattices are caused after mixing, and full utilization of Cu, Fe, Zn and Mn is achieved, the cost is reduced and the utilization rate is increased, and the heavy metal pollution of the soil is reduced while providing industrial and agricultural services in the field of soil improvement and management. The resource utilization of waste opens up a new way and also fully provides the necessary elements for the growth and development of crops. Among them, the main ingredient of the single-atom composite powder, single-atom copper, has a smaller particle size and is evenly dispersed, which gives the medium and trace element soil conditioner a good bactericidal effect, and has a better coverage rate than traditional copper preparations. In addition, the auxiliary ingredient oyster shell contains rich calcium, which is also a medium and trace element necessary for crop growth. Not only does it not need to be mined, but it also realizes resource recycling. The medium and trace element soil conditioner containing atomic copper of the present invention has cheap and easy-to-obtain raw materials, a simple preparation method, low use cost and high utilization rate, can effectively improve soil structure, has bactericidal and disease-resistant effects, regulates crop growth, increases crop yield, and improves crop quality, and has great prospects for promotion and application. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] This embodiment is a medium and trace element soil conditioner containing atomic copper in granular form, which specifically includes the following steps:

[0035] S1: Ethanol and water are mixed in a volume ratio of 1:8 to prepare an ethanol aqueous solution, a certain amount of sodium silicate is weighed and dissolved in the ethanol aqueous solution to prepare a sodium silicate solution with a concentration of 0.4 mol / L, and then 0.5 g of a cationic surfactant hexadecyltrimethylammonium bromide is added, and ultrasonic dispersion is performed at an ultrasonic dispersion frequency of 80 kHz for 8 minutes to obtain a mixed solution;

[0036] S2: Prepare 100 mL of ammonium chloride solution with a concentration of 1.5 mol / L, and drip the mixed solution into the ammonium chloride solution at a speed of 100 μL / s at a temperature of 40°C and a stirring rate of 400 r / min until the pH reaches 8.5, and then continue stirring for 1.5 h to obtain a precipitate;

[0037] S3: The precipitate is centrifuged and washed with an ethanol aqueous solution containing hexadecyltrimethylammonium bromide, and then placed in a drying oven and dried at 100° C. to obtain a solid powder;

[0038] S4: adding the solid powder into a muffle furnace, calcining at 500° C. for 4 h, and then ball-milling the powder to a particle size of 80 nm to obtain a nano-silica carrier;

[0039] S5: 20 mL of 5% ammonia solution was added dropwise to 500 mL of 20 g / L metal sulfate aqueous solution at a rate of 20 μL / s, and the mixture was stirred for 3 h at a stirring rate of 500 r / min. The mixture was then heated to 65° C. within 35 min and stirred for 3 h. After stirring, the mixture was cooled to room temperature to obtain a metal coordination precursor solution.

[0040] S6: adding the metal coordination precursor solution to the nano-silica carrier, wherein the mass ratio of the transition metal to the nano-silica carrier is 1:20, ultrasonically dispersing for 30 minutes at an ultrasonic dispersion frequency of 100 kHz, then mixing and stirring for 10 hours at a stirring rate of 500 r / min, then washing with water until neutral, filtering, drying, and ball milling for 0.5 hours at a rotation speed of 100 r / min to obtain a solid powder;

[0041] S7: heating the solid powder at 600°C for 10 h under the condition of passing air, cooling it to room temperature, and ball milling it at a speed of 200 r / min for 20 min to obtain a single-atom composite powder;

[0042] S8: Weigh 50 parts of monatomic composite powder, 10 parts of silicon-based non-metallic material, 10 parts of oyster shell, 10 parts of light-burned magnesium powder, 5 parts of bentonite, 6 parts of attapulgite powder, 0.5 parts of sodium hydroxide, 3 parts of sugar ether liquid, and 5 parts of water according to weight parts, and set aside;

[0043] S9: Mixing and crushing the single-atom composite powder, silicon-based non-metallic material, oyster shell, light-burned magnesium powder, and bentonite, grinding to 120 mesh, then sieving, adding water to form 8 mm balls, and drying to obtain raw material balls;

[0044] S10: adding the raw material balls into a rotary calcining furnace, and calcining them at a temperature of 1200° C. and a pressure of 0.9 Pa for 30 min to obtain clinker;

[0045] S11: quenching and drying the clinker to obtain a solid particle product;

[0046] S12: Grind the solid particle product to 100 mesh, sieve, and obtain a powdery mixture;

[0047] S13: Add attapulgite powder, sodium hydroxide, sugar ether liquid and water to the powdery mixture, mix and stir evenly, then add to a granulator for granulation, and finally dry through a drum dryer to obtain the granular medium and trace element soil conditioner containing atomic copper.

[0048] Embodiment 2:

[0049] This embodiment is a medium and trace element soil conditioner containing atomic copper in granular form, which specifically includes the following steps:

[0050] S1: Ethanol and water are mixed in a volume ratio of 1:8 to prepare an ethanol aqueous solution, a certain amount of sodium silicate is weighed and dissolved in the ethanol aqueous solution to prepare a sodium silicate solution with a concentration of 0.4 mol / L, and then 0.5 g of a cationic surfactant hexadecyltrimethylammonium bromide is added, and ultrasonic dispersion is performed at an ultrasonic dispersion frequency of 85 kHz for 9 minutes to obtain a mixed solution;

[0051] S2: Prepare 100 mL of ammonium chloride solution with a concentration of 1.5 mol / L, and drip the mixed solution into the ammonium chloride solution at a speed of 100 μL / s at a temperature of 45°C and a stirring rate of 430 r / min until the pH reaches 8.5, and then continue stirring for 1.6 h to obtain a precipitate;

[0052] S3: The precipitate is centrifuged and washed with an ethanol aqueous solution containing hexadecyltrimethylammonium bromide, and then placed in a drying oven and dried at 120° C. to obtain a solid powder;

[0053] S4: The solid powder is then added into a muffle furnace, calcined at 600° C. for 5 h, and then ball-milled to a powder particle size of 85 nm to obtain a nano-silica carrier;

[0054] S5: 22 mL of 6% ammonia solution was added dropwise to 500 mL of 20 g / L metal sulfate aqueous solution at a rate of 22 μL / s, and the mixture was stirred at a stirring rate of 530 r / min for 3.5 h. The mixture was then heated to 66° C. within 36 min and stirred for 3.5 h. After stirring, the mixture was cooled to room temperature to obtain a metal coordination precursor solution.

[0055] S6: adding the metal coordination precursor solution to the nano-silica carrier, wherein the mass ratio of the transition metal to the nano-silica carrier is 1:80, ultrasonically dispersing for 40 minutes at an ultrasonic dispersion frequency of 110 kHz, then mixing and stirring for 12 hours at a stirring rate of 600 r / min, then washing with water until neutral, filtering, drying, and ball milling for 1 hour at a rotation speed of 200 r / min to obtain a solid powder;

[0056] S7: The solid powder was heated at 680°C for 14 h under the condition of passing air, then cooled to room temperature, and ball-milled at a rotation speed of 400 r / min for 35 min to obtain a single-atom composite powder;

[0057] S8: Weigh 54 parts of monatomic composite powder, 16 parts of silicon-based non-metallic material, 14 parts of oyster shell, 14 parts of light-burned magnesium powder, 6 parts of bentonite, 8 parts of attapulgite powder, 1 part of sodium hydroxide, 4.5 parts of sugar ether liquid, and 6.5 parts of water according to weight parts, and set aside;

[0058] S9: Mixing and crushing the single-atom composite powder, silicon-based non-metallic material, oyster shell, light-burned magnesium powder, and bentonite, grinding to 160 mesh, then sieving, adding water to form 8 mm balls, and drying to obtain raw material balls;

[0059] S10: adding the raw material balls into a rotary calcining furnace, and calcining for 35 minutes at a temperature of 1240° C. and a pressure of 0.95 Pa to obtain clinker;

[0060] S11: quenching and drying the clinker to obtain a solid particle product;

[0061] S12: grinding the solid particle product to 140 mesh, sieving, and obtaining a powdery mixture;

[0062] S13: Add attapulgite powder, sodium hydroxide, sugar ether liquid and water to the powdery mixture, mix and stir evenly, then add to a granulator for granulation, and finally dry through a drum dryer to obtain the granular medium and trace element soil conditioner containing atomic copper.

[0063] Embodiment 3:

[0064] This embodiment is a medium and trace element soil conditioner containing atomic copper in granular form, which specifically includes the following steps:

[0065] S1: ethanol and water are mixed in a volume ratio of 1:8 to prepare an ethanol aqueous solution, a certain amount of sodium silicate is weighed and dissolved in the ethanol aqueous solution to prepare a sodium silicate solution with a concentration of 0.4 mol / L, and then 0.5 g of a cationic surfactant hexadecyltrimethylammonium bromide is added, and ultrasonic dispersion is performed at an ultrasonic dispersion frequency of 90 kHz for 10 min to obtain a mixed solution;

[0066] S2: Prepare 100 mL of ammonium chloride solution with a concentration of 1.5 mol / L, and drip the mixed solution into the ammonium chloride solution at a speed of 100 μL / s at a temperature of 48°C and a stirring rate of 460 r / min until the pH reaches 8.5, and then continue stirring for 1.8 h to obtain a precipitate;

[0067] S3: The precipitate is centrifuged and washed with an ethanol aqueous solution containing hexadecyltrimethylammonium bromide, and then placed in a drying oven and dried at 140° C. to obtain a solid powder;

[0068] S4: adding the solid powder into a muffle furnace, calcining at 700° C. for 6 h, and then ball-milling the powder to a particle size of 90 nm to obtain a nano-silica carrier;

[0069] S5: 24 mL of 7% ammonia solution was added dropwise to 500 mL of 20 g / L metal sulfate aqueous solution at a rate of 24 μL / s, and the mixture was stirred for 4 h at a stirring rate of 560 r / min. The mixture was then heated to 68° C. within 38 min and stirred for 4 h. After stirring, the mixture was cooled to room temperature to obtain a metal coordination precursor solution.

[0070] S6: adding the metal coordination precursor solution to the nano-silica carrier, wherein the mass ratio of the transition metal to the nano-silica carrier is 1:140, ultrasonically dispersing for 45 minutes at an ultrasonic dispersion frequency of 115kHz, then mixing and stirring for 14 hours at a stirring rate of 700r / min, then washing with water until neutral, filtering, drying, and ball milling for 2 hours at a rotation speed of 400r / min to obtain a solid powder;

[0071] S7: The solid powder was heated at 750°C for 16 h under the condition of passing air, then cooled to room temperature, and ball-milled at a rotation speed of 600 r / min for 45 min to obtain a single-atom composite powder;

[0072] S8: Weigh 56 parts of monatomic composite powder, 24 parts of silicon-based non-metallic material, 16 parts of oyster shell, 16 parts of light-burned magnesium powder, 8 parts of bentonite, 10 parts of attapulgite powder, 1.5 parts of sodium hydroxide, 5.5 parts of sugar ether liquid, and 8 parts of water according to weight parts, and set aside;

[0073] S9: Mixing and crushing the single-atom composite powder, silicon-based non-metallic material, oyster shell, light-burned magnesium powder, and bentonite, grinding to 180 mesh, then sieving, adding water to form 8 mm balls, and drying to obtain raw material balls;

[0074] S10: adding the raw material balls into a rotary calcining furnace, and calcining for 40 minutes at a temperature of 1270° C. and a pressure of 0.95 Pa to obtain clinker;

[0075] S11: quenching and drying the clinker to obtain a solid particle product;

[0076] S12: grinding the solid particle product to 160 mesh, sieving, and obtaining a powdery mixture;

[0077] S13: Add attapulgite powder, sodium hydroxide, sugar ether liquid and water to the powdery mixture, mix and stir evenly, then add to a granulator for granulation, and finally dry through a drum dryer to obtain the granular medium and trace element soil conditioner containing atomic copper.

[0078] Embodiment 4:

[0079] This embodiment is a medium and trace element soil conditioner containing atomic copper in granular form, which specifically includes the following steps:

[0080] S1: ethanol and water are mixed in a volume ratio of 1:8 to prepare an ethanol aqueous solution, a certain amount of sodium silicate is weighed and dissolved in the ethanol aqueous solution to prepare a sodium silicate solution with a concentration of 0.4 mol / L, and then 0.5 g of a cationic surfactant hexadecyltrimethylammonium bromide is added, and ultrasonic dispersion is performed for 10 min under the condition of an ultrasonic dispersion frequency of 100 kHz to obtain a mixed solution;

[0081] S2: Prepare 100 mL of ammonium chloride solution with a concentration of 1.5 mol / L, and drip the mixed solution into the ammonium chloride solution at a speed of 100 μL / s at a temperature of 50°C and a stirring rate of 500 r / min until the pH reaches 8.5, and then continue stirring for 2 h to obtain a precipitate;

[0082] S3: The precipitate is centrifuged and washed with an ethanol aqueous solution containing hexadecyltrimethylammonium bromide, and then placed in a drying oven and dried at 150° C. to obtain a solid powder;

[0083] S4: adding the solid powder into a muffle furnace, calcining at 800° C. for 8 h, and then ball-milling the powder to a particle size of 100 nm to obtain a nano-silica carrier;

[0084] S5: 25 mL of 8% ammonia solution was added dropwise to 500 mL of 20 g / L metal sulfate aqueous solution at a rate of 25 μL / s, and the mixture was stirred for 5 h at a stirring rate of 600 r / min. The mixture was then heated to 70° C. within 40 min and stirred for 5 h. After stirring, the mixture was cooled to room temperature to obtain a metal coordination precursor solution.

[0085] S6: adding the metal coordination precursor solution to the nano-silica carrier, wherein the mass ratio of the transition metal to the nano-silica carrier is 1:200, ultrasonically dispersing for 50 min at an ultrasonic dispersion frequency of 120 kHz, then mixing and stirring for 16 h at a stirring rate of 800 r / min, then washing with water until neutral, filtering, drying, and ball milling for 3 h at a rotation speed of 600 r / min to obtain a solid powder;

[0086] S7: heating the solid powder at 800°C for 20 h under the condition of passing air, cooling it to room temperature, and ball milling it at a speed of 800 r / min for 60 min to obtain a single-atom composite powder;

[0087] S8: Weigh 60 parts of monatomic composite powder, 30 parts of silicon-based non-metallic material, 20 parts of oyster shell, 20 parts of light-burned magnesium powder, 10 parts of bentonite, 12 parts of attapulgite powder, 2 parts of sodium hydroxide, 7 parts of sugar ether liquid, and 10 parts of water according to weight parts, and set aside;

[0088] S9: Mixing and crushing the single-atom composite powder, silicon-based non-metallic material, oyster shell, light-burned magnesium powder, and bentonite, grinding to 200 mesh, then sieving, adding water to form 8 mm balls, and drying to obtain raw material balls;

[0089] S10: adding the raw material balls into a rotary calcining furnace, and calcining them at a temperature of 1300° C. and a pressure of 1 Pa for 50 min to obtain clinker;

[0090] S11: quenching and drying the clinker to obtain a solid particle product;

[0091] S12: grinding the solid particle product to 180 mesh, sieving, and obtaining a powdery mixture;

[0092] S13: Add attapulgite powder, sodium hydroxide, sugar ether liquid and water to the powdery mixture, mix and stir evenly, then add to a granulator for granulation, and finally dry through a drum dryer to obtain the granular medium and trace element soil conditioner containing atomic copper.

[0093] Experimental Example 1

[0094] Use period: cucumber seed germination period;

[0095] Dosage: 500 g of the granular medium and trace element soil conditioner containing atomic copper obtained in Example 1 was applied to a 30 m 2 On the cucumber field;

[0096] Effect of use: The germination speed of cucumber seeds is increased, from the normal 7 days to 4 days, the germination speed is increased by 43%, and the germination rate is significantly improved, and the cucumber seedlings grow in an orderly manner.

[0097] Experimental Example 2

[0098] Use period: before transplanting tomato seedlings;

[0099] Dosage: 5 kg of the granular medium and trace element soil conditioner containing atomic copper obtained in Example 2 was applied to a 320 m 2 On the tomato field;

[0100] Effect: The tomato seedlings grew well, with the normal 10 days for seedling hardening being shortened to 6 days, the speed of seedling hardening increased by 40%, and the tomato seedling death rate reduced by 50%.

[0101] Experimental Example 3

[0102] Use period: wheat growing period;

[0103] Dosage: 10 kg of the granular medium and trace element soil conditioner containing atomic copper obtained in Example 3 was applied to 666.7 m 2On the wheat fields;

[0104] Effect of use: The wheat growth rate is faster than that without use, the plant height increases by an average of 10cm, the number of tillers per wheat plant increases by an average of 2-3, and the yield increases by 25%.

[0105] Experimental Example 4

[0106] Use period: Wogan flowering period

[0107] Dosage: 10 kg of the granular medium and trace element soil conditioner containing atomic copper obtained in Example 4 was applied to 666.7 m 2 On the land where the Wogan oranges are grown;

[0108] Effect of use: The flowering speed of Wogan increased by 20%, 87% of the fruits matured at the same time during the fruit harvest period, the fruit commercial rate reached more than 90%, and the yield increased by 15%.

[0109] In summary, the use of the granular medium and trace element soil conditioner containing atomic copper prepared by the present invention improves the structure and quality of the soil, so that the germination speed of crops is fast; sterilization and disease resistance, seedling mortality rate is reduced; root growth and seedlings are strengthened, growth rate is accelerated, and crop yield is increased; flowering and fruiting are promoted, and the quality of crops is improved. It can be seen that the use effect of the medium and trace element soil conditioner containing atomic copper of the present invention is good.

[0110] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means 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 representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0111] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A medium and trace element soil conditioner containing atomic copper, characterized in that: The medium and trace element soil conditioner containing atomic copper is prepared by the following steps: S1: Weigh 50-60 parts of monatomic composite powder, 10-30 parts of silicon-based non-metallic material, 10-20 parts of oyster shell, 10-20 parts of light-burned magnesium powder, 5-10 parts of bentonite, 6-12 parts of attapulgite powder, 0.5-2 parts of sodium hydroxide, 3-7 parts of sugar ether liquid, and 5-10 parts of water according to weight parts, and set aside; S2: Mix and crush the single-atom composite powder, silicon-based non-metallic material, oyster shell, light-burned magnesium powder and bentonite, grind to 120-200 mesh, then sieve, add water to form 8 mm balls and dry to obtain raw material balls; S3: adding the raw material balls into a rotary calcining furnace, calcining for 30-50 min at a temperature of 1200-1300° C. and a pressure of 0.9-1 Pa to obtain clinker; S4: quenching the clinker with water and drying it to obtain a solid particle product; S5: grinding the solid particle product to 100-180 mesh, sieving, and obtaining a powdery mixture; S6: Add attapulgite powder, sodium hydroxide, sugar ether liquid and water to the powdery mixture, mix and stir evenly, then add it to a granulator for granulation, and finally dry it through a drum dryer to obtain the medium and trace element soil conditioner containing atomic copper.

2. The medium and trace element soil conditioner containing atomic copper according to claim 1, characterized in that: The silicon-based non-metallic material is one of quartz, river sand, silicon dioxide and silicate.

3. The medium and trace element soil conditioner containing atomic copper according to claim 1, characterized in that: The single-atom composite powder is obtained by anchoring transition metals in the form of single atoms on defect sites on the surface of a nano-silicon dioxide carrier.

4. The medium and trace element soil conditioner containing atomic copper according to claim 3, characterized in that: The source of the transition metal is an aqueous solution of metal sulfate.

5. The medium and trace element soil conditioner containing atomic copper according to claim 3, characterized in that: The mass ratio of the transition metal to the nano-silicon dioxide carrier is 1:20-1:

250.

6. The medium and trace element soil conditioner containing atomic copper according to claim 1, characterized in that: The preparation method of the single-atom composite powder comprises the following steps: A1: Preparation of nano-silica carrier by chemical precipitation method; A2: 20-25 mL of 5-8% ammonia solution was added dropwise to 500 mL of 20 g / L metal sulfate aqueous solution at a rate of 20-25 μL / s, and the mixture was stirred at a stirring rate of 500-600 r / min for 3-5 h. The mixture was then heated to 65-70°C within 35-40 min and stirred for 3-5 h. After stirring, the mixture was cooled to room temperature to obtain a metal coordination precursor solution. A3: Add the metal coordination precursor solution to the nano-silica carrier, wherein the mass ratio of the transition metal to the nano-silica carrier is 1:20-1:200, and ultrasonically disperse for 30-50 minutes at an ultrasonic dispersion frequency of 100-120kHz, then mix and stir for 10-16 hours at a stirring rate of 500-800r / min, then wash with water until neutral, filter, dry, and ball mill for 0.5-3 hours at a rotation speed of 100-600r / min to obtain a solid powder; A4: Heat the solid powder at 600-800°C for 10-20 hours under air flow, then cool to room temperature, and ball mill for 20-60 minutes at a rotation speed of 200-800 r / min to obtain a single-atom composite powder.

7. The medium and trace element soil conditioner containing atomic copper according to claim 6, characterized in that: The molar ratio of transition metals in the aqueous solution of metal sulfate described in step A2 is Cu:Fe:Zn:Mn=2:1:1:0.

5.

8. The medium and trace element soil conditioner containing atomic copper according to claim 6, characterized in that: The preparation method of the nano-silicon dioxide carrier comprises the following steps: B1: Ethanol and water are mixed in a volume ratio of 1:8 to prepare an ethanol aqueous solution, a certain amount of sodium silicate is weighed and dissolved in the ethanol aqueous solution to prepare a sodium silicate solution with a concentration of 0.4 mol / L, and then 0.5 g of a cationic surfactant hexadecyltrimethylammonium bromide is added, and ultrasonic dispersion is performed for 8-10 min at an ultrasonic dispersion frequency of 80-100 kHz to obtain a mixed solution; B2: Prepare 100 mL of 1.5 mol / L ammonium chloride solution, add the mixed solution to the ammonium chloride solution at a rate of 100 μL / s at a temperature of 40-50°C and a stirring rate of 400-500 r / min until the pH reaches 8.5, and then continue stirring for 1.5-2 h to obtain a precipitate; B3: The precipitate is centrifuged and washed with an ethanol aqueous solution containing hexadecyltrimethylammonium bromide, and then placed in a drying oven and dried at a temperature of 100-150° C. to obtain a solid powder; B4: The solid powder is added into a muffle furnace, calcined at a temperature of 500-800° C. for 4-8 hours, and then ball-milled to a powder particle size of 80-100 nm to obtain the nano-silicon dioxide carrier.