阅读说明：本技术 一种设施栽培水肥一体化系统及施肥方法 (Facility cultivation water and fertilizer integrated system and fertilizer application method ) 是由 杨磊 高璐阳 陈宏坤 武良 钱成洋 赵旭剑 于 2021-09-07 设计创作，主要内容包括：本发明提供一种设施栽培水肥一体化系统及施肥方法,属于农作物肥料技术领域,将水溶肥通过滴灌管网进行施肥,其中,所述水溶肥的制备方法是以农林有机质废弃物为原料,通过调节水分、pH、C/N并加入作为发酵调节剂得到发酵原料,再通过依次接种第一复合菌种和第二复合菌种并分别进行好氧发酵得到发酵液,将所述发酵液进行曝气后加入第三复合菌种并培养3-5天,制得水溶肥；所述水溶肥具有高的有机底物利用率和发酵液固含,适于通过滴灌管网进行施用。(The invention provides a facility cultivation water-fertilizer integrated system and a fertilizing method, belonging to the technical field of crop fertilizers, and a water-soluble fertilizer is fertilized through a drip irrigation pipe network, wherein the water-soluble fertilizer is prepared by taking agriculture and forestry organic waste as a raw material, obtaining a fermentation raw material by adjusting water, pH and C/N and adding the fermentation raw material as a fermentation regulator, sequentially inoculating a first composite strain and a second composite strain and respectively carrying out aerobic fermentation to obtain fermentation liquor, aerating the fermentation liquor, adding a third composite strain and culturing for 3-5 days to obtain the water-soluble fertilizer; the water soluble fertilizer has high organic substrate utilization rate and fermentation liquor solid content, and is suitable for being applied through a drip irrigation pipe network.)

1. A facility cultivation water and fertilizer integrated fertilization method is characterized in that water soluble fertilizer is fertilized through a drip irrigation pipe network, wherein the preparation method of the water soluble fertilizer comprises the following steps:

s1, crushing the agricultural and forestry organic waste to a particle size of not more than 2mm, adding water to adjust the solid content to 10-20%, adjusting the pH value to 6-9, and adjusting the C/N ratio to (20-30): 1, adding a fermentation regulator, uniformly stirring and standing to obtain a fermentation raw material;

s2, adding a first compound strain into the fermentation raw material, and carrying out first aerobic fermentation under the condition of air supply, wherein the fermentation temperature is 60-70 ℃, and the fermentation time is 10-15 days, so as to obtain a first fermentation solution;

wherein, the first composite strain is prepared from (4-5): 2: 1: 1, the composite bacteria or EM microbial inoculum is formed by combining saccharomycetes, actinomycetes, rhizopus and photosynthetic bacteria;

s3, adding a second compound strain into the first fermentation liquid, carrying out secondary aerobic fermentation under the condition of air supply, wherein the fermentation temperature is 50-55 ℃, the fermentation time is 5-8 days, so as to obtain a second fermentation liquid, and carrying out solid-liquid separation so as to obtain a fermentation liquid;

wherein, the second composite strain is prepared by mixing the following components in proportion of 2: 1: 1: (0.1-0.2): (0.1-0.2) a combination bacterium composed of bacillus, pseudomonas, mould, yeast and actinomycetes;

s4, aerating the fermentation liquor, adding a third composite strain, and culturing for 3-5 days to obtain the water-soluble fertilizer;

the fermentation regulator comprises straw biochar, and the preparation method of the straw biochar comprises the following steps:

peeling and cutting the corn, sorghum, rape or cotton straws into small segments, washing the obtained straw segments with deionized water and ethanol for several times, drying, ball-milling and crushing, adding the crushed straw segments into a saturated pyridine diamine solution, stirring overnight, filtering, drying, putting the straw segments into a high-temperature atmosphere tube furnace, heating to 1000-1200 ℃ under the mixed atmosphere of 100-110sccm argon and 10-20scm hydrogen, preserving heat and carbonizing for 60-100min, keeping the mixed atmosphere and removing a heat source, switching the atmosphere into the mixed atmosphere of 100-110 nitrogen and 10-20sccm steam when the temperature is reduced to 600-800 ℃, switching the atmosphere into argon when the temperature is reduced to below 500 ℃, cooling to room temperature to obtain a carbonized product, immersing the carbon product into 1-2mol/L hydrochloric acid solution to remove impurities, washing with deionized water to neutrality, drying to obtain the straw biochar.

2. The facility cultivation water and fertilizer integrated fertilization method as claimed in claim 1, wherein the agriculture and forestry organic waste is straw, wood chips, bagasse or livestock manure, and the straw is stem and leaf parts of corn, sorghum, wheat, rice, rape and cotton.

3. The method for integrated fertilization of facility cultivation water and fertilizer as claimed in claim 1, wherein the fermentation regulator further comprises one or more of molasses fermentation liquor, potassium dihydrogen phosphate, magnesium sulfate, potassium chloride and ferrous sulfate.

4. The method for integrated fertilization of facility cultivation with water and fertilizer as claimed in claim 1, wherein the third complex bacterial species comprises one or more of azotobacter, phosphate solubilizing bacteria, lactic acid bacteria, silicate bacteria, bacillus and actinomycetes.

5. The facility cultivation water and fertilizer integrated fertilization method as claimed in claim 1, wherein the straw biochar is added in an amount of 0.1-2% of the mass of the agriculture and forestry organic matter waste.

6. A water and fertilizer integrated system for facility cultivation applying the fertilizing method of claim 1, which is characterized by comprising a water supply device, a fermentation device and an irrigation device, wherein the water supply device, the fermentation device and the irrigation device are respectively connected with a Venturi suction device; the water supply device comprises a water pump, an adjusting tank, a filtering device and a purifying device which are connected in sequence through pipelines; the fermentation device comprises a fermentation tank and a fertilization tank which are sequentially connected through a pipeline; the irrigation device comprises a flow meter, a pressurizing device and a drip irrigation pipe belt which are sequentially connected through a pipeline.

7. The facility cultivation water and fertilizer integrated fertilizer system as claimed in claim 6, wherein the adjusting tank is used for adjusting the soluble ionic component and pH value of the water source.

8. The facility cultivation water and fertilizer integrated fertilization system of claim 6, wherein the water supply device further comprises a temperature control device.

9. The water and fertilizer integrated fertilizer system for facility cultivation according to claim 6, wherein a catalytic bactericide is placed in the purification device, and the preparation method of the catalytic bactericide comprises the following steps:

a1, adding 1% by volume of polyethylene glycol into graphene oxide dispersion liquid according to volume fraction, performing ultrasonic dispersion treatment, centrifuging at 3000rpm for 10min after ultrasonic treatment, removing precipitate, taking supernatant, adding ammonium molybdate with the final concentration of 0.05-0.1mol/L, fully stirring and mixing, adding acetic acid solution of thioacetamide to ensure that the final concentration of thioacetamide is 0.1-0.2mol/L, fully stirring and mixing, transferring the moderating solution into a reaction kettle with a polytetrafluoroethylene lining, performing heat preservation reaction for 24h under the autogenous pressure of 180 ℃ and 200 ℃, filtering out a precipitate product, washing with absolute ethyl alcohol and deionized water in sequence, and drying to obtain a product A;

wherein the concentration of the graphene oxide dispersion liquid is 5-10 mg/mL;

a2, adding deionized water and the product A into a polyurethane prepolymer, stirring and mixing uniformly to obtain a suspension emulsion, adding a cross-linking agent and an initiator, carrying out polymerization, cross-linking and curing to obtain a gel product, and cutting the gel product into a proper size as required to obtain the catalytic bactericide;

the mass ratio of the polyurethane prepolymer to deionized water, the product A, the cross-linking agent and the initiator is 3: (4-5): (1-2): (1-1.2): (0.1-0.2).

Technical Field

The invention relates to the technical field of crop fertilizers, in particular to a facility cultivation water and fertilizer integrated system and a fertilizing method.

Background

The water and fertilizer integration technology is a new agricultural technology which integrates irrigation and fertilization by utilizing an irrigation system, and is a new agricultural technology which realizes that crops absorb moisture and nutrients by injecting fertilizer solution into an irrigation water conveying pipeline under the action of pressure. The irrigation water with dissolved fertilizer is used for forming drip irrigation by a fertilizer solution through a pipeline and a water dropper through an irrigation emitter (a spray head, a micro spray head, a water dropper and the like), so that the root development and growth area of crops can be uniformly, regularly and quantitatively infiltrated. And the soil moisture and nutrients can be accurately regulated and controlled according to the soil properties, the crop growth and the water and fertilizer demand rule, and the method has the advantages of water conservation, energy conservation, labor conservation, production and income increase, convenience for large-scale management and standardized production and the like.

An organic crop production system is one of the modes of modern agricultural sustainable development, and organic fertilizers are used as purely natural, multifunctional, high-fertilizer-efficiency and environment-friendly fertilizers and have the characteristics of easy absorption and utilization by crops, no pollution, simple application, convenient transportation and the like compared with the traditional fertilizers. In the prior art, most of organic fertilizers are prepared by reasonably proportioning organic materials and then fermenting the organic materials by a solid fermentation method under the action of a microbial agent, and the organic fertilizers have obvious effects on the aspects of activating soil, maintaining soil fertility, inhibiting diseases, improving crop yield and quality and the like.

Because the flow channel of the drip irrigation emitter is small, the solubility of the fertilizer needs to be considered when the drip irrigation system is used for fertilizing, and the water-soluble and soluble substance content in the solid fermented organic fertilizer is low, so in the prior art, the fertilizer used for water and fertilizer integration is mainly soluble chemical mineral fertilizer, the utilization rate of the organic fertilizer applied by the drip irrigation system is not high, and the drip irrigation emitter is not suitable for an organic crop cultivation system.

Disclosure of Invention

Aiming at the problems of low fermentation degree and low content of soluble substances of organic fertilizers, the invention provides a facility cultivation water-fertilizer integrated system and a fertilizing method.

The purpose of the invention is realized by adopting the following technical scheme:

a water and fertilizer integrated fertilization method for facility cultivation specifically comprises the step of fertilizing water soluble fertilizer through a drip irrigation pipe network, wherein the preparation method of the water soluble fertilizer comprises the following steps:

s1, crushing the agricultural and forestry organic waste to a particle size of not more than 2mm, adding water to adjust the solid content to 10-20%, adjusting the pH value to 6-9, and adjusting the C/N ratio to (20-30): 1, adding a fermentation regulator, uniformly stirring and standing to obtain a fermentation raw material;

s2, adding a first compound strain into the fermentation raw material, and carrying out first aerobic fermentation under the condition of air supply, wherein the fermentation temperature is 60-70 ℃, and the fermentation time is 10-15 days, so as to obtain a first fermentation solution;

wherein, the first composite strain is prepared from (4-5): 2: 1: 1, the composite bacteria or EM microbial inoculum is formed by combining saccharomycetes, actinomycetes, rhizopus and photosynthetic bacteria;

s3, adding a second compound strain into the first fermentation liquid, carrying out secondary aerobic fermentation under the condition of air supply, wherein the fermentation temperature is 50-55 ℃, the fermentation time is 5-8 days, so as to obtain a second fermentation liquid, and carrying out solid-liquid separation so as to obtain a fermentation liquid;

wherein, the second composite strain is prepared by mixing the following components in proportion of 2: 1: 1: (0.1-0.2): (0.1-0.2) a combination bacterium composed of bacillus, pseudomonas, mould, yeast and actinomycetes;

s4, aerating the fermentation liquor, adding a third composite strain, and culturing for 3-5 days to obtain the water-soluble fertilizer;

the fermentation regulator comprises straw biochar, and the preparation method of the straw biochar comprises the following steps:

peeling and cutting the corn, sorghum, rape or cotton straws into small segments, washing the obtained straw segments with deionized water and ethanol for several times, drying, ball-milling and crushing, adding the crushed straw segments into a saturated pyridine diamine solution, stirring overnight, filtering, drying, putting the straw segments into a high-temperature atmosphere tube furnace, heating to 1000-1200 ℃ under the mixed atmosphere of 100-110sccm argon and 10-20scm hydrogen, preserving heat and carbonizing for 60-100min, keeping the mixed atmosphere and removing a heat source, switching the atmosphere into the mixed atmosphere of 100-110 nitrogen and 10-20sccm steam when the temperature is reduced to 600-800 ℃, switching the atmosphere into argon when the temperature is reduced to below 500 ℃, cooling to room temperature to obtain a carbonized product, immersing the carbon product into 1-2mol/L hydrochloric acid solution to remove impurities, washing with deionized water to neutrality, drying to obtain the straw biochar.

Preferably, the agricultural and forestry organic waste is straw, wood chips, bagasse or livestock manure, and the straw is stem and leaf parts of corn, sorghum, wheat, rice, rape and cotton.

Preferably, the fermentation regulator further comprises one or more of molasses fermentation liquor, potassium dihydrogen phosphate, magnesium sulfate, potassium chloride and ferrous sulfate.

Preferably, the third composite bacterial strain comprises one or more of azotobacter, phosphate solubilizing bacteria, lactic acid bacteria, silicate bacteria, bacillus and actinomycetes.

Preferably, the adding amount of the straw biochar is 0.1-2% of the mass of the agricultural and forestry organic matter waste.

The invention also aims to provide a water and fertilizer integrated system for facility cultivation applying the fertilizing method, which comprises a water supply device, a fermentation device and an irrigation device, wherein the water supply device, the fermentation device and the irrigation device are respectively connected with a Venturi suction device; the water supply device comprises a water pump, an adjusting tank, a filtering device and a purifying device which are connected in sequence through pipelines; the fermentation device comprises a fermentation tank and a fertilization tank which are sequentially connected through a pipeline; the irrigation device comprises a flow meter, a pressurizing device and a drip irrigation pipe belt which are sequentially connected through a pipeline.

Preferably, the adjusting tank is used for adjusting the soluble ion component and the pH value in the water source.

Preferably, the water supply device further comprises a temperature control device.

Preferably, a catalytic bactericide is arranged in the purification device, and the preparation method of the catalytic bactericide comprises the following steps:

a1, adding 1% by volume of polyethylene glycol into graphene oxide dispersion liquid according to volume fraction, performing ultrasonic dispersion treatment, centrifuging at 3000rpm for 10min after ultrasonic treatment, removing precipitate, taking supernatant, adding ammonium molybdate with the final concentration of 0.05-0.1mol/L, fully stirring and mixing, adding acetic acid solution of thioacetamide to ensure that the final concentration of thioacetamide is 0.1-0.2mol/L, fully stirring and mixing, transferring the moderating solution into a reaction kettle with a polytetrafluoroethylene lining, performing heat preservation reaction for 24h under the autogenous pressure of 180 ℃ and 200 ℃, filtering out a precipitate product, washing with absolute ethyl alcohol and deionized water in sequence, and drying to obtain a product A;

wherein the concentration of the graphene oxide dispersion liquid is 5-10 mg/mL;

a2, adding deionized water and the product A into a polyurethane prepolymer, stirring and mixing uniformly to obtain a suspension emulsion, adding a cross-linking agent and an initiator, carrying out polymerization, cross-linking and curing to obtain a gel product, and cutting the gel product into a proper size as required to obtain the catalytic bactericide;

the mass ratio of the polyurethane prepolymer to deionized water, the product A, the cross-linking agent and the initiator is 3: (4-5): (1-2): (1-1.2): (0.1-0.2).

The invention has the beneficial effects that:

(1) based on the problems of low fermentation degree and low water dissolution of organic fertilizers in the prior art, the invention adopts multi-strain compounding, improves the fermentation degree of the agricultural and forestry organic wastes through secondary fermentation, improves the water dissolution amount of the agricultural and forestry organic wastes, further promotes the fermentation process by adding a fermentation regulator, concretely, takes corn, sorghum, rape or cotton straws with high oxygen content as raw materials, utilizes the good adsorbability of the straws to adsorb and fix pyridine diamine in the straws to obtain straws with high nitrogen content, obtains nitrogen-doped porous biochar through high-temperature carbonization under the protection and reduction atmosphere of high nitrogen content, obtains the nitrogen-oxygen-doped porous biochar through steam treatment, on one hand, the nitrogen-oxygen-doped biochar enhances the adsorption of oxygen and can promote the aerobic fermentation, on the other hand, the nitrogen-oxygen doped charcoal can be used for locally enriching zymophyte, improving the fermentation environment, increasing the utilization rate of organic substrates and further increasing the solid content of fermentation liquor.

(2) According to the water and fertilizer integrated system, the fermentation device is additionally arranged, the agriculture and forestry organic waste can be fermented in situ, and fermentation liquor is input into the field along with the fertilization system through the Venturi suction device; the flow control device is added to realize accurate control according to requirements; by adding the pressurizing device, the problems that the traditional water and fertilizer integrated system is unbalanced in pressure, large in water pressure on one side and small in water pressure on one side, and uneven in fertilization are solved; by arranging the adjusting tank device, various ions and impurities such as calcium magnesium ions, sulfate ions, carbonate ions, bicarbonate ions and the like in irrigation water can be removed or reduced, and meanwhile, the pH value of the irrigation water can be adjusted, so that the condition that the effectiveness of the fertilizer is reduced or a filter is blocked by precipitation due to the reaction of the irrigation water and related ions in the fertilizer is avoided; by arranging the temperature control device, the irrigation water temperature can be ensured to basically accord with the proper water temperature (16-30 ℃) for normal growth of general crops, and the phenomenon that the growth of the crops is influenced by overhigh or overlow water temperature is avoided.

(3) The number of coliform groups in each liter of water is less than 1 ten thousand specified by the national irrigation water standard, and for microbial fertilizers, the microbes in the water can also inhibit beneficial functional bacteria in microbial fertilizers, so that the water for drip irrigation needs to be sterilized before entering a drip irrigation system, but the high-temperature sterilization efficiency is high, but the energy consumption is large, and the added bactericide has broad-spectrum killing effect on beneficial microbes in organic bacterial fertilizers, therefore, the invention kills the bacteria in the water by an out-of-phase photocatalysis method through arranging a purification device with a catalytic bactericide, and particularly utilizes the visible light catalytic activity of molybdenum disulfide, the invention can improve the separation efficiency of electron hole pairs by a nano composite structure through a one-step hydrothermal method based on well-dispersed graphene oxide dispersion liquid and taking thioacetamide as a sulfur source to generate the molybdenum disulfide on the graphene oxide in situ, the composite product can be used as a catalyst for water sterilization under visible light, has better disinfection and sterilization efficiency than titanium dioxide under the excitation of a solar light source, and can be used for simply separating catalytic bactericide from water without influencing beneficial microorganisms in organic bacterial manure by using insoluble hydrophilic hydrogel as an out-phase photocatalytic carrier.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

FIG. 1 is a schematic view of a pipeline connection structure of a facility cultivation water and fertilizer integrated system.

Reference numerals: 1-a water supply device; 2-a fermentation device; 3-irrigation equipment.

Detailed Description

The invention is further described with reference to the following examples.

Example 1

The embodiment relates to a water and fertilizer integrated fertilization method for facility cultivation, in particular to fertilization of a water soluble fertilizer through a drip irrigation pipe network, wherein the preparation method of the water soluble fertilizer comprises the following steps:

s1, drying the straws, bagasse and livestock manure, then crushing the dried straws, bagasse and livestock manure to obtain particles with the particle size not larger than 2mm, adding water to adjust the solid content to be 15-16%, adjusting the pH value to be 7-8, and adjusting the C/N ratio to be 25: 1, adding a fermentation regulator, uniformly stirring and standing to obtain a fermentation raw material;

s2, adding a first compound strain into the fermentation raw material, and carrying out first aerobic fermentation under the condition of air supply, wherein the fermentation temperature is 60-70 ℃, and the fermentation time is 10-15 days, so as to obtain a first fermentation solution;

wherein, the first composite strain is prepared by mixing the following components in proportion of 4: 2: 1: 1, the composite bacteria or EM microbial inoculum is formed by combining saccharomycetes, actinomycetes, rhizopus and photosynthetic bacteria;

s3, adding a second compound strain into the first fermentation liquid, carrying out secondary aerobic fermentation under the condition of air supply, wherein the fermentation temperature is 50-55 ℃, the fermentation time is 5-8 days, so as to obtain a second fermentation liquid, and carrying out solid-liquid separation so as to obtain a fermentation liquid, wherein the solid content of the fermentation liquid is 6.5%;

wherein, the second composite strain is prepared by mixing the following components in proportion of 2: 1: 1: 0.1: 0.1 of bacillus, pseudomonas, mould, saccharomycete and actinomycete;

s4, aerating the fermentation liquor, adding a third composite strain, and culturing for 3-5 days to obtain the water-soluble fertilizer;

the third composite strain comprises azotobacter, phosphorus-solubilizing bacteria, lactic acid bacteria, silicate bacteria, bacillus and actinomycetes;

the fermentation regulator comprises straw biochar, the addition amount of the straw biochar is 1% of the solid content of the fermentation raw material, and the preparation method comprises the following steps:

peeling and cutting the corn, sorghum, rape or cotton straws into small segments, washing the obtained straw segments with deionized water and ethanol for several times, drying, ball-milling and crushing, adding the crushed straw segments into a saturated pyridine diamine solution, stirring overnight, filtering, drying, putting the straw segments into a high-temperature atmosphere tube furnace, heating to 1000-1200 ℃ under the mixed atmosphere of 100-110sccm argon and 10-20scm hydrogen, preserving heat and carbonizing for 60-100min, keeping the mixed atmosphere and removing a heat source, switching the atmosphere into the mixed atmosphere of 100-110 nitrogen and 10-20sccm steam when the temperature is reduced to 600-800 ℃, switching the atmosphere into argon when the temperature is reduced to below 500 ℃, cooling to room temperature to obtain a carbonized product, immersing the carbon product into 1-2mol/L hydrochloric acid solution to remove impurities, washing with deionized water to neutrality, drying to obtain the straw biochar.

Example 2

A water and fertilizer integrated fertilization method for facility cultivation specifically comprises the step of fertilizing water soluble fertilizer through a drip irrigation pipe network, wherein the preparation method of the water soluble fertilizer comprises the following steps:

s1, drying the straws, bagasse and livestock manure, then crushing the dried straws, bagasse and livestock manure to obtain particles with the particle size not larger than 2mm, adding water to adjust the solid content to be 15-16%, adjusting the pH value to be 7-8, and adjusting the C/N ratio to be 25: 1, adding a fermentation regulator, uniformly stirring and standing to obtain a fermentation raw material;

s2, adding a first compound strain into the fermentation raw material, and carrying out first aerobic fermentation under the condition of air supply, wherein the fermentation temperature is 60-70 ℃, and the fermentation time is 10-15 days, so as to obtain a first fermentation solution;

wherein, the first composite strain is prepared by mixing the following components in proportion of 4: 2: 1: 1, the composite bacteria or EM microbial inoculum is formed by combining saccharomycetes, actinomycetes, rhizopus and photosynthetic bacteria;

s3, adding a second compound strain into the first fermentation liquid, carrying out secondary aerobic fermentation under the condition of air supply, wherein the fermentation temperature is 50-55 ℃, the fermentation time is 5-8 days, so as to obtain a second fermentation liquid, and carrying out solid-liquid separation so as to obtain a fermentation liquid, wherein the solid content of the fermentation liquid is 2.2%;

wherein, the second composite strain is prepared by mixing the following components in proportion of 2: 1: 1: 0.1: 0.1 of bacillus, pseudomonas, mould, saccharomycete and actinomycete;

s4, aerating the fermentation liquor, adding a third composite strain, and culturing for 3-5 days to obtain the water-soluble fertilizer;

the third composite strain comprises azotobacter, phosphorus-solubilizing bacteria, lactic acid bacteria, silicate bacteria, bacillus and actinomycetes.

Example 3

In the same way as in example 1, the preparation method of the straw biochar comprises the following steps:

peeling and cutting the corn, sorghum, rape or cotton straws into small sections, washing the obtained straw sections for a plurality of times by using deionized water and ethanol, drying, ball-milling and crushing, then putting into a high-temperature atmosphere tube furnace, heating to 1000-1200 ℃ under protective atmosphere, preserving heat and carbonizing for 60-100min, cooling to room temperature to obtain a carbonized product, immersing the carbonized product into 1-2mol/L hydrochloric acid solution to remove impurities, washing with deionized water to be neutral, and drying to obtain the straw biochar.

The solids content of the fermentation liquor described in this example was found to be 4.1%.

Example 4

The embodiment relates to a facility cultivation water and fertilizer integrated system, which comprises a water supply device 1, a fermentation device 2 and an irrigation device 3, wherein the water supply device 1, the fermentation device 2 and the irrigation device 3 are respectively connected with a venturi suction device; the water supply device 1 comprises a water pump, an adjusting tank, a filtering device, a temperature control device and a purifying device which are sequentially connected through pipelines; the fermentation device 2 comprises a fermentation tank and a fertilization tank which are sequentially connected through a pipeline; the irrigation device 3 comprises a flow meter, a pressurizing device and a drip irrigation pipe belt which are sequentially connected through a pipeline; the adjusting tank is used for adjusting soluble ion components and pH value in a water source;

the purification device is internally provided with a catalytic bactericide, and the preparation method of the catalytic bactericide comprises the following steps:

a1, adding 1% by volume of polyethylene glycol into 5mg/mL graphene oxide dispersion liquid according to volume fraction, performing ultrasonic dispersion treatment, centrifuging at 3000rpm for 10min after ultrasonic treatment, removing precipitate, taking supernatant, adding ammonium molybdate with the final concentration of 0.1mol/L, fully stirring and mixing, adding acetic acid solution of thioacetamide to ensure that the final concentration of the thioacetamide is 0.2mol/L, fully stirring and mixing, transferring the moderated solution into a reaction kettle with a polytetrafluoroethylene lining, performing heat preservation reaction for 24h under the autogenous pressure of 180 ℃ and 200 ℃, filtering out a precipitate, washing with absolute ethyl alcohol and deionized water in sequence, and drying to obtain a product A;

a2, adding 40 parts by weight of deionized water and 20 parts by weight of the product A into 30 parts by weight of polyurethane prepolymer, stirring and mixing uniformly to obtain a suspension emulsion, adding 10 parts by weight of polyethylene glycol dimethacrylate and 1 part by weight of tetramethylethylenediamine, carrying out polymerization crosslinking and curing to obtain a gel product, and cutting the gel product into a proper size as required to obtain the catalytic bactericide.

Comparative example 1

In the same way as in example 4, the preparation method of the catalytic bactericide comprises the following steps:

adding 40 parts by weight of deionized water and 20 parts by weight of molybdenum disulfide into 30 parts by weight of polyurethane prepolymer, stirring and mixing uniformly to obtain a suspension emulsion, adding 10 parts by weight of polyethylene glycol dimethacrylate and 1 part by weight of tetramethylethylenediamine, carrying out polymerization crosslinking and curing to obtain a gel product, and cutting the gel product into a proper size as required to obtain the catalytic bactericide.

Comparative example 2

In the same way as in example 4, the preparation method of the catalytic bactericide comprises the following steps:

adding 40 parts by weight of deionized water, 5 parts by weight of graphene oxide and 15 parts by weight of molybdenum disulfide into 30 parts by weight of polyurethane prepolymer, stirring and mixing uniformly to obtain a suspension emulsion, adding 10 parts by weight of polyethylene glycol dimethacrylate and 1 part by weight of tetramethylethylenediamine, carrying out polymerization crosslinking curing to obtain a gel product, and cutting the gel product into a proper size as required to obtain the catalytic bactericide.

The disinfection efficiency of the purification device in example 4 and comparative examples 1-2 to the water body was measured under sunlight, and the details are as follows:

finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.