Facility vegetable field repairing agent as well as preparation method and application thereof

Abstract

The invention relates to the technical field of agriculture, in particular to a facility vegetable field repairing agent and a preparation method and application thereof. The facility vegetable field repairing agent comprises boric sludge doped kitchen waste biomass charcoal, amino-functionalized diatom mineral powder, a growth-promoting and disease-inhibiting compound and a photosensitive active soil conditioning compound. According to the invention, an environment-friendly concept of treating pollution with waste is adopted, agricultural waste resources such as boric sludge, kitchen garbage, silkworm excrement, kitchen compost and the like are fully utilized, and a scientific formula and a modification process are adopted; the powdery facility vegetable field repairing agent with multiple functions is compounded by doping the boric sludge with the kitchen waste biomass charcoal, the amino-functionalized diatom mineral powder, the growth-promoting and disease-inhibiting compound and the photosensitive active soil-adjusting compound. The test shows that the compound has the positive effects of relieving soil acidification, improving soil fertility, passivating heavy metal cadmium, promoting crop growth, inhibiting growth of fusarium oxysporum, reducing cucumber morbidity and the like, and is beneficial to solving the problems of degradation of facility vegetable fields and cadmium pollution.

Description

Technical Field

[0001] The invention relates to the technical field of agriculture, and in particular to a facility vegetable field repair agent and a preparation method and application thereof. Background Art

[0002] With the continuous advancement of modern agricultural technology, facility agriculture has become an important pillar for improving agricultural production efficiency and ensuring food safety, and its status is becoming increasingly prominent. However, in the long-term intensive cultivation of facility vegetable fields, soil health is facing unprecedented challenges, mainly including soil degradation, heavy metal pollution and frequent soil-borne diseases. These problems have seriously restricted the sustainable development of facility agriculture.

[0003] Soil degradation is particularly prominent in greenhouse vegetable fields, manifested in compacted soil structure, reduced organic matter, decreased fertility, and increased acidification. These changes not only affect the soil's ability to retain water and fertilizer, but also limit the normal growth of crop roots, thereby affecting the yield and quality of vegetables. At the same time, heavy metal pollution is another serious problem. Through the infiltration of pesticides, fertilizers, and industrial waste, it gradually accumulates in the soil, posing a potential threat to the ecological environment and human health.

[0004] In order to meet these challenges, a variety of soil remediation and improvement technologies have been developed and applied. Among them, vegetable field remediation agents have attracted much attention due to their convenience and comprehensive effects. However, vegetable field remediation agents on the market generally have single functions and limited effects, making it difficult to fully solve the complex problems faced by vegetable field soil. Summary of the invention

[0005] In view of this, the present invention proposes an innovative and multifunctional vegetable field repair agent, which aims to achieve effective mitigation of soil acidification, deep passivation of heavy metal pollution, significant improvement of soil nutrients and active prevention and control of soil-borne diseases through scientific formulas and advanced processes. The repair agent can not only comprehensively improve soil quality and promote crop growth, but also effectively eliminate obstacles to continuous cropping and improve the overall production efficiency of vegetable fields. What is particularly important is that in the preparation process of the repair agent, the present invention actively practices the environmental protection concept of "using waste to treat pollution", and cleverly converts wastes such as boric mud, kitchen waste, and silkworm feces into important components of the repair agent. This innovative measure not only realizes the resource utilization of waste and reduces production costs, but also reduces environmental pollution, reflecting the green, circular, and low-carbon sustainable development ideas.

[0006] Specifically, the present invention first provides a facility vegetable field repair agent, including boron mud-doped kitchen waste biochar, amino-functionalized diatom mineral powder, a growth-promoting and disease-inhibiting compound, and a photosensitizing active soil conditioning compound.

[0007] Preferably, the facility vegetable field repair agent contains the following components in parts by weight: 50 to 250 parts of boron mud-doped kitchen waste biochar, 30 to 180 parts of amino-functionalized diatom mineral powder, 10 to 80 parts of a growth-promoting and disease-inhibiting compound, and 5 to 50 parts of a photosensitizing active soil-adjusting compound.

[0008] Preferably, the facility vegetable field repair agent contains the following components in parts by weight: 120-200 parts of boron mud-doped kitchen waste biochar, 60-150 parts of amino-functionalized diatom mineral powder, 30-60 parts of growth-promoting and disease-suppressing compound, and 10-40 parts of photosensitizing active soil conditioning compound.

[0009] More preferably, the facility vegetable field repair agent comprises the following components in parts by weight: 120-180 parts of boron mud-doped kitchen waste biochar, 100-150 parts of amino-functionalized diatom mineral powder, 30-60 parts of a growth-promoting and disease-inhibiting compound, and 20-40 parts of a photosensitizing active soil-adjusting compound.

[0010] Preferably, the method for preparing the boron mud-doped kitchen waste biochar comprises: The kitchen waste (preferably dried) is crushed into kitchen waste particles of 2-5 mm, and then the kitchen waste particles are mixed with boron mud in a mass ratio of (1-15):1 (preferably 5-10:1) to obtain a mixed solid material; and then the mixed solid material is roasted to 400-900° C. at a heating rate of 2-10° C. / min, and kept warm for 0.5-6 h (preferably after being ground through a 40-200 mesh sieve).

[0011] Preferably, the yield of the boron mud-doped kitchen waste biochar is 30.1% to 45.2% based on the mass method.

[0012] Preferably, the pH value of the boron mud-doped kitchen waste biochar is 8.52-10.59; the EC value is 2.69-5.37 mS / cm; the proportions of C, H, O, N, and S elements are 32.81%-38.73%, 1.12%-2.80%, 11.67%-17.99%, 0.98%-2.11%, and 0.53%-0.80%, respectively; the ash content is 37.57%-52.89%; and the specific surface area is 2.26-35.64 m 2 / g, pore volume is 0.001~0.058 cm 3 / g, and the average pore size is 4.30~8.26 nm.

[0013] Preferably, the total solid content of the kitchen waste particles is 10.42% to 15.33%, the volatile solid content is 9.74% to 14.15%, the total sugar content is 50.67% to 60.93%, the reducing sugar content is 10.82% to 14.31%, and the starch content is 39.85% to 46.18%; And / or, the borax mud contains MgO, SiO2, Fe2O3, and B2O3; the contents of MgO, SiO2, Fe2O3, and B2O3 are 28.85%~41.00%, 22.96%~30.11%, 3.79%~9.93%, and 2.07%~3.65%, respectively.

[0014] Preferably, the mass fractions of organic carbon with molecular weight ≤1 ku, 1-5 ku and ≥5 ku in the kitchen waste particles measured by microfiltration method are 44.39%-80.21%, 6.13%-12.36% and 7.43%-49.48%, respectively.

[0015] Preferably, the borax mud is used after being crushed, ground and dried.

[0016] Preferably, the particle size of the borax is 50-200 μm.

[0017] Preferably, the calcination is carried out in a muffle furnace.

[0018] Preferably, the calcination adopts an oxygen-limited temperature carbonization method.

[0019] Preferably, the preparation method of the amino-functionalized diatom powder comprises: heating the diatom powder to 200-800°C (preferably keeping warm for 0.5-6 h) to obtain heat-modified diatom powder; mixing the heat-modified diatom powder with dilute hydrochloric acid (preferably 1-8 mol / L) at a solid-liquid ratio of 1:(1-10), stirring (preferably stirring for 2-24 h) at 25-80°C (preferably 55-65°C) in a closed environment, (preferably using suction filtration) to separate to obtain an acid-heat-modified diatom powder slurry, then washing until the pH value of the supernatant is 6.8-7.2 (neutral), drying (preferably grinding through a 100-mesh sieve) to obtain an acid-heat-modified diatom powder; mixing the acid-heat-modified diatom powder with ethanol, water, and a silane coupling agent, and stirring (preferably magnetically stirring at 25-80°C for 0.5-5 h), (preferably through a 4500 r / min centrifugation, washing (washing until the EC value is stable), drying at 60°C, and grinding with 100 meshes to obtain the amino-functionalized diatom mineral powder.

[0020] Preferably, the diatom mineral powder contains CaO, SiO2, MgO, and Fe2O3; the contents of CaO, SiO2, MgO, and Fe2O3 are 39.10%~50.39%, 28.77%~36.02%, 5.46%~8.04%, and 0.10%~0.79%, respectively; and / or, the solid-liquid ratio of the acid-heat-modified diatom mineral powder to ethanol is 1:(2~35) (preferably 1:(10~20)); and / or, the amount of water added is 1%~5% of the total volume of the acid-heat-modified diatom mineral powder and ethanol; and / or, the silane coupling agent is at least one of 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, N-2aminoethyl-3-aminopropyltrimethoxysilane, N-2-aminoethyl-3-aminopropyltriethoxysilane, and diethylenetriaminopropyltrimethoxysilane.

[0021] Preferably, the volume percentage of the silane coupling agent is 1% to 10%.

[0022] Preferably, the specific surface area of ​​the amino-functionalized diatom mineral powder is 5.08-20.75 m 2 / g, and the total pore volume is 0.007~0.050 cm 3 / g, the average pore size is 1.44~13.76 nm, and the Zeta potential is 20.13~55.26 mV.

[0023] Preferably, the preparation method of the growth-promoting and disease-suppressing compound comprises: mixing silkworm feces (preferably rinsed with water multiple times and then drained) with a plant essential oil water dilution at a solid-liquid ratio of 1g:5~20mL to obtain a mixture A; mixing the mixture A with solid kitchen compost (preferably the mass fraction of solid kitchen compost in the mixture A is 10%~70%, more preferably 30%~50%) to obtain a mixture B; air-drying or sun-drying the mixture B (preferably spreading it flat in the sunlight outdoors and turning it over regularly) (preferably grinding it to pass through a 0.15mm sieve) to obtain the growth-promoting and disease-suppressing compound.

[0024] Preferably, the silkworm excrement is excrement of 2-4 year old silkworms.

[0025] Preferably, the plant essential oil in the plant essential oil water dilution is at least one of citronella essential oil, datura essential oil, Millettia spatholobi essential oil, lavender essential oil, cinnamon essential oil, lemon essential oil, celery essential oil, laurel essential oil, angelica essential oil, rosemary essential oil, patchouli essential oil, geranium essential oil, tea tree essential oil, chrysanthemum essential oil, and peppermint essential oil (preferably mixed in equal mass ratios).

[0026] In the specific implementation process, the plant essential oil can be purchased from Guangzhou Fuling Xinji Biotechnology Co., Ltd., Guangzhou Fangli Pharmaceutical Technology Co., Ltd., Jiangxi Xuesong Natural Medicinal Oil Co., Ltd., Mingrui Group (Henan) Co., Ltd., Ji'an Jinyu Biotechnology Co., Ltd., Guilin Top Spice Co., Ltd., etc.

[0027] In the specific implementation process, the solid food waste compost is a commercially available product, which can be obtained from the Taihu Lake Organic Waste Treatment and Utilization Demonstration Center or purchased from Hubei Liuyangge Biotechnology Co., Ltd., Beijing Guozhong Biotechnology Co., Ltd., Jiangsu Siweibo Biotechnology Co., Ltd., Nanning Peanut Environmental Protection Technology Co., Ltd., etc.

[0028] Preferably, the concentration of the plant essential oil in the plant essential oil water dilution is 20-300 mg / mL.

[0029] Preferably, the pH value of the growth-promoting and disease-suppressing compound is 7.42-8.89, the conductivity is 1.36-3.27 mS / cm, the total nitrogen content is 16.5-20.1 g / kg, the total phosphorus content is 3.14-5.20 g / kg, the available potassium content is 2.11-4.20 g / kg, and the organic matter content is 550-710 g / kg.

[0030] Preferably, the preparation method of the photosensitizing active soil-adjusting composite comprises: mixing an organic solvent with water at a volume percentage of 2.0-10% to obtain a special solvent for the reaction; mixing melamine, the special solvent for the reaction and multi-walled carbon nanotubes, and then ultrasonically separating to obtain a photosensitizing active substance A; drying the photosensitizing active substance A at 60-100° C. to obtain a photosensitizing active substance B; mixing the photosensitizing active substance B with magnesium chloride and ferric chloride, and then ultrasonically separating to adjust the pH value to 9.8-10.2 to obtain a mixed solution; hydrothermally reacting the mixed solution at 100-200° C. for more than 12 hours to separate and obtain a photosensitizing active substance C, rinsing the photosensitizing active substance C until the pH of the washing solution is stable, and drying to obtain the photosensitizing active soil-adjusting composite.

[0031] Preferably, the organic solvent is selected from one or more of acetic acid, lactic acid, ethanol, pyridine, hot ethylene glycol, glycerol and acetone; if there are two or more, the solvents are mixed in equal volume ratios.

[0032] Preferably, 0.5-5.0 g of melamine is placed in a beaker, 50-200 mL of a special reaction solvent is added to the beaker, and 0.1-1.1 g of multi-walled carbon nanotubes is added after magnetic stirring for 10-30 min; then, the mixed solution is placed in an ultrasonic instrument at 30-70° C. and an output power density of 0.3-0.7 W / cm³ for 0.4-4 h, and then centrifuged at 4000-8000 r / min for 10-35 min to obtain a photosensitizing active substance A; the photosensitizing active substance A is placed in a 60-100° C. oven for drying, and after being taken out, it is ground and sieved to obtain a photosensitizing active substance B; 0.1-0.5 g of the photosensitizing active substance B is placed in a beaker, and then 20-70 mL, 0.016-0.064 mol of magnesium chloride hexahydrate and 0.008-0.032 mol of ferric chloride hexahydrate are added in sequence; the mixed solution in the beaker is ultrasonically treated for 10-30 min, then potassium hydroxide solution is added dropwise under magnetic stirring to adjust the pH value of the mixed solution to 9.8-10.2 to obtain a mixed solution; the mixed solution is transferred to a polytetrafluoroethylene reactor and placed in a 100-200°C oven for hydrothermal reaction for 12-48 h; the mixture obtained by the hydrothermal reaction is centrifuged at 4000-8000 r / min to obtain a photosensitizing active substance C; the photosensitizing active substance C is repeatedly rinsed with deionized water until the pH of the washing solution is constant, and finally dried in a 60-100°C oven, ground and sieved to obtain a photosensitizing active soil-adjusting composite with a brown-black appearance.

[0033] Furthermore, the present invention provides a method for preparing the facility vegetable field repair agent, comprising: mixing boron mud doped with kitchen waste biochar, amino-functionalized diatom mineral powder, a growth-promoting and disease-inhibiting compound, and a photosensitizing active soil conditioning compound, and then grinding the mixture; Preferably, in the grinding, the mass ratio of grinding balls to materials is 20-100:1, and / or the grinding time is 1-12 hours, and / or the grinding speed is 200-600 rpm.

[0034] Preferably, the grinding balls are 3-8 mm agate grinding balls.

[0035] Furthermore, the present invention provides the use of the facility vegetable field repair agent in at least one of the following aspects: (1) Alleviate soil acidification; (2) Increase soil organic matter and nutrient content; (3) Promote the growth of greenhouse crops and improve the yield and quality of greenhouse crops; (4) Passivate soil heavy metals and alleviate heavy metal stress; (5) Inhibit Fusarium oxysporum; (6) Reduce the incidence of wilt disease in cucumber plants.

[0036] Preferably, the heavy metal is cadmium.

[0037] Preferably, the facility crops are fruits and vegetables; more preferably, cucumbers and Chinese cabbages.

[0038] Compared with the prior art, the present invention has the following beneficial effects: (I) The present invention innovatively uses kitchen waste, compost, boric mud, silkworm feces and other wastes as important components of the facility vegetable field repair agent, and realizes the resource utilization of wastes through scientific proportioning and processing. This measure not only effectively reduces the pressure of environmental pollution, but also promotes the recycling of resources, truly turning waste into treasure, and conforms to the green, circular, low-carbon sustainable development concept.

[0039] (II) This invention breaks the limitation of the single function of traditional vegetable field repair agents. Through the combination of scientific formula and advanced technology, it realizes multiple functions such as alleviating soil acidification, passivating heavy metals, increasing soil nutrient content, promoting crop growth, and preventing soil-borne diseases. This all-round and multi-level soil improvement effect can solve soil problems more comprehensively and create a healthier and more stable soil environment for crop growth.

[0040] (III) The vegetable field repair agent of the present invention adopts common processes and instruments and equipment in the preparation process, which is easy to operate and cost-controlled. This makes the improver highly technically feasible in production and has the potential for large-scale production. Once large-scale production is achieved, it will be able to more effectively meet market demand and promote the popularization and application of soil improvement technology.

[0041] (IV) The vegetable field repair agent of the present invention can be applied in powder form, which is not only convenient for storage and transportation, but also makes the application method simpler and more diverse. Users can apply the improver in various ways such as broadcasting, strip application, layered application, and soil mixing according to actual needs, which greatly improves the convenience and flexibility of use. This humanized design makes the improver more easily accepted and promoted by farmers and agricultural enterprises.

[0042] In summary, the multifunctional facility vegetable field repair agent proposed in the present invention, with its unique innovations, comprehensive functional advantages and significant environmental benefits, provides a new solution to solving soil problems in facility agriculture, and has important market application potential and social value. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a flow chart for the preparation of the facility vegetable field repair agent provided in Example 1.

[0044] Figure 2This is a schematic diagram of the effect of the facility vegetable field repair agent provided in Example 1 on the quality of single white cabbage plants after being applied to the soil; wherein the CK treatment is no application of the repair agent; the T1 treatment is the application of 5 g / kg of the repair agent; and the T2 treatment is the application of 10 g / kg of the repair agent.

[0045] Figure 3 This is a schematic diagram of the effect of the facility vegetable field repair agent provided in Example 1 on the Vc of Chinese cabbage after being applied to the soil; wherein the CK treatment is no application of the repair agent; the T1 treatment is the application of 5 g / kg of the repair agent; and the T2 treatment is the application of 10 g / kg of the repair agent.

[0046] Figure 4 This is a schematic diagram of the effect of the facility vegetable field repair agent provided in Example 1 on the plant height of Chinese cabbage after being applied to the soil; wherein the CK treatment is no application of the repair agent; the T1 treatment is the application of 5 g / kg of the repair agent; and the T2 treatment is the application of 10 g / kg of the repair agent.

[0047] Figure 5 The effect of the facility vegetable field remediation agent provided in Example 1 on the available Cd content in acidic soil contaminated by heavy metal Cd; wherein the CK treatment is no application of the remediation agent; the T1 treatment is the application of 5 g / kg of the remediation agent; and the T2 treatment is the application of 15 g / kg of the remediation agent.

[0048] Figure 6 The effect of the facility vegetable field remediation agent provided in Example 1 on the change of soil Cd storage form in acidic soil contaminated with heavy metal Cd; wherein the CK treatment is no application of the remediation agent; the T1 treatment is the application of 5 g / kg of the remediation agent; and the T2 treatment is the application of 15 g / kg of the remediation agent.

[0049] Figure 7 This is a diagram showing the inhibitory effect of the greenhouse vegetable field repair agent provided in Example 1 on the growth of the cucumber-specific type of Fusarium oxysporum in a plate test in a dish; wherein the CK treatment represents the inoculation of the Fusarium oxysporum strain alone, and the T1, T2, and T3 treatments represent the application of the greenhouse vegetable field repair agent prepared with sterile water at a soil-water ratio of 1%, 3%, and 5%, respectively.

[0050] Figure 8 The results of the effect of the facility vegetable field repair agent provided in Example 1 on the disease occurrence of cucumber after being applied to farmland soil; wherein CK was inoculated with FOC bacterial solution alone; T1 was inoculated with FOC bacterial solution and then 3% of the soil weight of the facility vegetable field repair agent was applied; T2 was inoculated with FOC bacterial solution and then 3% of the soil weight of boron mud doped with kitchen waste biochar was applied; T3 was inoculated with FOC bacterial solution and then 3% of the soil weight of amino-functionalized diatom mineral powder was applied; T4 was inoculated with FOC bacterial solution and then 3% of the soil weight of a growth-promoting and disease-inhibiting compound was applied; T5 was inoculated with FOC bacterial solution and then 3% of the soil weight of a photosensitizing active soil conditioning compound was applied. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are 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.

[0052] If no specific techniques or conditions are specified in the examples, all are carried out according to conventional methods or the techniques or conditions described in the literature in the field, or according to the product instructions. If no manufacturer is specified for the reagents and instruments used, all are conventional products that can be purchased through regular channels.

[0053] Example 1

[0054] The present embodiment provides a facility vegetable field repair agent, comprising the following components in parts by weight: 150 parts of boron mud-doped kitchen waste biochar, 120 parts of amino-functionalized diatom mineral powder, 45 parts of a growth-promoting and disease-inhibiting compound, and 30 parts of a photosensitizing active soil conditioning compound.

[0055] Among them, the boron mud-doped kitchen waste biochar is prepared by the following method: (1) Kitchen waste was collected from a student cafeteria of China Agricultural University, and was manually sorted to remove large debris such as bones, fish bones, shells, chopsticks, etc. before being air-dried and crushed. The dried kitchen waste was crushed into 2 mm kitchen waste particles using a grinder, and the particles were sealed and stored as raw material A. The total solid content of the kitchen waste particles was 15.33%, the volatile solid content was 13.79%, the total sugar content was 54.67%, the reducing sugar content was 12.82%, and the starch content was 43.18%. The mass fractions of organic carbon with molecular weight ≤1 ku, 1-5 ku, and ≥5 ku in the kitchen waste particles were measured by microfiltration method and were 62.32%, 12.36%, and 25.32%, respectively. (2) Taking 10 g as the basic mass, weigh the boron mud (boron mud was taken from a boron mud storage site in Dashiqiao City, Liaoning Province. After being taken back, it was crushed, ground and dried before use. Its particle size was 50-200 μm, and the contents of MgO, SiO2, Fe2O3 and B2O3 were 35.32%, 26.52%, 6.43% and 2.75% respectively) and raw material A, mix the boron mud into the kitchen waste particles at a mass ratio of 1:7, and use a mechanical mixer to fully mix the solid materials to obtain raw material B; (3) The mixed solid material raw material B is placed in a crucible and then moved into a muffle furnace for calcination. The solid material is calcined to 500°C at a controlled heating rate of 10°C / min using an oxygen-limited carbonization method, and kept at this temperature for 3 h. After naturally cooling to room temperature, the solid material is taken out to obtain product A. (4) Grinding product A with an agate mortar, passing through a 100-mesh sieve to obtain boron mud-doped kitchen waste biochar, which was then stored in a brown bottle for later use; The yield of boron mud-doped kitchen waste biochar based on mass method was 43.2%; the pH value of boron mud-doped kitchen waste biochar was 9.52; the EC value was 5.37 mS / cm; the proportions of C, H, O, N, and S elements were 36.19%, 2.04%, 15.34%, 1.51%, and 0.67%, respectively; the ash content was 44.32%; the specific surface area was 32.61 m 2 / g, pore volume 0.029 cm 3 / g, and the average pore size is 6.62 nm.

[0056] Wherein, the amino-functionalized diatom mineral powder is prepared by the following method: (1) Place diatom mineral powder (diatom mineral powder purchased from Liaoning Yimushen Agricultural Technology Co., Ltd., with CaO, SiO2, MgO, and Fe2O3 contents of 45.39%, 33.77%, 7.46%, and 0.70%, respectively) in a muffle furnace, control the heating rate to 5°C / min, roast to 500°C, keep warm for 2 h, and take out after naturally cooling to room temperature to obtain thermally modified diatom mineral powder; (2) Accurately measure analytical pure concentrated hydrochloric acid to prepare 3 mol / L dilute hydrochloric acid. Take 5 g as the base mass and add the thermally modified diatom mineral powder into a beaker containing dilute hydrochloric acid at a solid-liquid ratio of 1:10 (g:mL). Then seal the beaker with a sealing film and stir at 60°C using a heated magnetic stirrer for 10 h. (3) Separating the acid-heat-modified diatom mineral slurry by suction filtration, and then washing it with deionized water for multiple times until the pH value of the supernatant is neutral, and then drying the obtained slurry in a 70°C oven, grinding it through a 100-mesh sieve to obtain the acid-heat-modified diatom mineral powder; (4) Weigh a certain amount of acid-heat modified diatom powder and place it in a three-necked flask. Pour anhydrous ethanol into the flask at a solid-liquid ratio of 1:15, add 1.2% deionized water, and then add 3% 3-aminopropyltriethoxysilane. Stir magnetically at 50 °C for 5 h, then centrifuge (4500 r / min), wash with deionized water (wash until the EC value is stable), dry (60 °C), and grind (100 mesh) to obtain amino-functionalized diatom powder. The specific surface area of ​​the amino-functionalized diatom powder is 12.08 m 2 / g, and the total pore volume is 0.037 cm 3 / g, the average pore size is 7.44 nm, and the Zeta potential is 30.13 mV.

[0057] The growth-promoting and disease-suppressing compound is prepared by the following method: The purchased 2-year-old silkworm excrement was rinsed with water for multiple times, and the water was drained. A 25 mg / mL peppermint essential oil aqueous dilution was added to the washed silkworm excrement at a material-liquid ratio of 1:10 (g:mL), and a glass rod was used to fully stir and mix them evenly to obtain a mixture A; a commercially available solid kitchen compost product (purchased from Beijing Guozhong Biotechnology Co., Ltd.) was added to the mixture A at a mass fraction of 40%, and the mixture was fully stirred to obtain a mixture B; the mixture B was spread out in the sun outdoors, turned over regularly to accelerate sun / air drying, and then ground and crushed and passed through a 0.15 mm sieve to obtain a growth-promoting and disease-inhibiting compound; the growth-promoting and disease-inhibiting compound had a pH value of 8.15, a conductivity of 2.47 mS / cm, a total nitrogen content of 19.5 g / kg, a total phosphorus content of 4.20 g / kg, a quick-acting potassium content of 3.11 g / kg, and an organic matter content of 640 g / kg.

[0058] The photosensitive active soil conditioning compound is prepared by the following method: (1) Add 10% by volume of ethanol to deionized water and stir to obtain a special solvent for the reaction. Place 3 g of melamine in a beaker, add 100 mL of the special solvent for the reaction to the beaker, stir magnetically for 20 min, and then add 0.3 g of multi-walled carbon nanotubes; (2) The mixed solution was placed in an ultrasonic apparatus at 60°C and an output power density of 0.5 W / cm³ for 2 h, and then centrifuged at 4500 r / min for 15 min to obtain photosensitizing active substance A; the photosensitizing active substance A was placed in an oven at 60°C for drying, and then taken out and ground and sieved to obtain photosensitizing active substance B; (3) Take 0.5 g of photosensitizing active substance B and place it in a beaker, then add 30 mL, 0.032 mol of magnesium chloride hexahydrate and 0.016 mol of ferric chloride hexahydrate in sequence; ultrasonically treat the mixture in the beaker for 20 min, then add potassium hydroxide solution dropwise under magnetic stirring to adjust the pH value of the mixture to 10; (4) The mixture obtained in step (3) is transferred into a polytetrafluoroethylene reactor, and placed in a 120°C oven for hydrothermal reaction for 36 h; the mixture obtained by the hydrothermal reaction is centrifuged at 4500 r / min for 20 min to obtain a photosensitizing active substance C; the photosensitizing active substance C is repeatedly rinsed with deionized water until the pH of the washing liquid is constant, and finally dried in a 60°C oven, ground and sieved to obtain a photosensitizing active soil-adjusting composite with a brown-black appearance.

[0059] The preparation method of the above-mentioned facility vegetable field repair agent is as follows: (1) Weigh corresponding portions of solid raw materials in sequence and mix them evenly to obtain pseudo-ball milled materials; (2) Dry grinding was performed using a planetary ball mill. The mass ratio of 6 mm agate grinding balls to the quasi-ball milled material was 30:1. The ball milling time was 9 h and the ball milling speed was 400 rpm. The vegetable field repair agent was prepared. The preparation process is as follows: Figure 1 shown.

[0060] Example 2

[0061] This example uses the facility vegetable field repair agent in Example 1 to conduct a potted plant experiment, aiming to explore the multiple functions of the repair agent in alleviating acidification, improving fertility, and promoting crop growth.

[0062] The acidic soil in Qingyuan City, Guangdong Province was selected as the test soil, and Chinese cabbage (Jingcui 60) was used as the test crop. The pot experiment method was used to deeply explore the effects of the facility vegetable field repair agent on the physical and chemical properties of the soil and the growth effect of Chinese cabbage. A total of three treatment groups were set up in the experiment, namely the control group (CK, no facility vegetable field repair agent was added), treatment group 1 (T1, the repair agent was added at a dosage of 5 g / kg) and treatment group 2 (T2, the repair agent was added at a dosage of 10 g / kg).

[0063] Before the experiment, the collected soil samples were air-dried, ground, and sieved through a 2 mm sieve to ensure that the samples were fully mixed, and then stored in wide-mouth bottles or plastic bottles. Chinese cabbage seeds were grown in plug trays and transplanted into pots after two leaves and one heart (15 days). One week before transplanting, the soil and repair agent were mixed and placed in plastic planting pots with an inner diameter of 14.5 cm and a height of 14 cm. 1000 g of soil was added to each pot. Each group was treated 4 times in parallel. Plant samples and soil samples were collected after 30 days of cultivation.

[0064] After the experiment, soil samples were collected for air drying, grinding, sieving and mixing. Subsequently, 2 g of soil sample was weighed into a 50 mL centrifuge tube, 10 mL of deionized water was added at a soil-water ratio of 1:5, the tube was capped, and placed on a reciprocating horizontal constant temperature oscillator for 15 min at 25°C ± 1°C. After the oscillation, the centrifuge tube was placed in the rotor of the Zhongke Zhongjia SC-3612 low-speed centrifuge, ensuring that the even number was placed symmetrically, the door cover was closed, and the centrifugation conditions were set to 4000 rpm and 4 min before centrifugation. After the centrifugation, the pH value was measured using a Leiji series PHS-3E pH meter, and the conductivity was measured using a DDS-307A conductivity meter. NY / T 85-1988 was used to determine the soil organic matter content; the alkaline hydrolysis diffusion method was used to determine the alkaline hydrolysis nitrogen content; the NaHCO3 extraction-molybdenum antimony colorimetric method was used to determine the available phosphorus content; the ammonium acetate extraction-atomic absorption spectrometer TAS 990 was used to determine the available potassium content; the 2,6-dichlorophenol indophenol titration method was used to determine the vitamin C (Vc) content; and the KCl leaching method was used to determine the soil exchangeable acid content. The test results are shown in Table 1.

[0065] Table 1 Effects of greenhouse vegetable field repair agents on soil physical and chemical properties

[0066] Analysis of Table 1 shows that compared with CK, the application of 5 g / kg of greenhouse vegetable field repair agent in the T1 treatment group increased the soil pH value by 1.19 units and the EC value by 0.62 times, while the application of 10 g / kg of greenhouse vegetable field repair agent increased the soil pH value by 1.63 units and the EC value by 0.76 times, which shows that the application of greenhouse vegetable field repair agent alleviates the problem of soil acidification, and at the same time increases the inorganic nutrients in the soil that can be used by crops; compared with CK, the organic matter content of T1 treatment increased by 20.43%, and that of T2 treatment increased by 36.97%, which increased the content of soil organic nutrients; the contents of alkaline nitrogen, available phosphorus, and available potassium in T1 treatment increased by 17.91%, 9.35%, and 18.10%, respectively, and in T2 treatment increased by 23.88%, 17.27%, and 29.31%, respectively, which improved soil fertility and nutrients; compared with CK, the application of greenhouse vegetable field repair agent reduced the total amount of exchangeable acid in the soil, with a decrease of 28.73% and 52.36%, respectively, which improved soil acidification. Figure 2 As shown in the figure, the weight of each plant of Chinese cabbage increased by 22.05% and 28.15% respectively, which increased the biomass of the crop and promoted its growth. Figure 3 It can be seen that compared with CK, the Vc content of Chinese cabbage in T1 treatment and T2 treatment increased by 96.18% and 128.99%, respectively. From the results, it can be seen that adding repair agent treatment can improve the quality of Chinese cabbage. Figure 4The plant height of Chinese cabbage under different treatments, including CK for 26.15cm, T1 for 27.23cm, and T2 for 27.91cm. The application of greenhouse vegetable field repair agent can increase the plant height of Chinese cabbage.

[0067] In summary, the application of this facility vegetable field repair agent can alleviate soil acidification, increase soil organic matter content, increase cabbage biomass, promote cabbage plant growth, help increase crop yields and improve crop quality.

[0068] Example 3

[0069] This example uses the facility vegetable field repair agent in Example 1 to conduct a potted plant experiment, aiming to explore the multiple functions of the repair agent in passivating heavy metal Cd, alleviating acidification, improving soil fertility, and increasing nutrient content.

[0070] The Cd-contaminated acidic soil in Bijie City, Guizhou Province was selected as the test soil, and Chinese cabbage (Jingcui 60) was used as the test crop. The pot experiment method was used to deeply explore the effects of the facility vegetable field remediation agent on soil physical and chemical properties and enzyme activity, heavy metal Cd content and form, and nutrient content. A total of three treatment groups were set up in the experiment, namely the control group (CK, no facility vegetable field remediation agent was added), treatment group 1 (T1, the amount of remediation agent added was 5 g / kg), and treatment group 2 (T2, the amount of remediation agent added was 15 g / kg).

[0071] Before the experiment, the collected soil samples were air-dried, ground, and sieved through a 2 mm sieve to ensure sample homogeneity. Chinese cabbage seeds were grown in plug trays and transplanted into pots after two leaves and one heart (15 days). One week before transplanting, the soil and soil amendment were mixed and placed in plastic planting pots with an inner diameter of 14.5 cm and a height of 14 cm. 1000 g of soil was added to each pot. Each group was treated 4 times in parallel. Plant samples and soil samples were collected after 30 days of cultivation.

[0072] After the experiment, soil samples were collected for air drying, grinding and sieving. Subsequently, 2 g of soil sample was weighed into a 50 mL centrifuge tube, 10 mL of deionized water was added at a soil-water ratio of 1:5, the tube was capped, and placed on a reciprocating horizontal constant temperature oscillator for 15 min at 25 °C ± 1 °C. After the oscillation was completed, the centrifuge tube was placed in the rotor of the Zhongke Zhongjia SC-3612 low-speed centrifuge, ensuring that the even number was placed symmetrically, the door cover was closed, and the centrifugation conditions were set to 4000 rpm and 4 min before centrifugation. After the centrifugation was completed, the conductivity was measured using a DDS-307A conductivity meter, and the pH value was measured using a Leiji series PHS-3E pH meter. The national standard method GB / T 23739-2009 was used to determine the available Cd content in soil; NY / T 85-1988 was used to determine the organic matter content in soil; the alkaline diffusion method was used to determine the available nitrogen content; the NaHCO3 extraction-molybdenum antimony colorimetric method was used to determine the available phosphorus content; the ammonium acetate extraction-atomic absorption spectrometer TAS 990 was used to determine the available potassium content; and DB61 / T 902.1-2013 was used to determine the Cd content in plant samples. The determination of each chemical form of Cd in soil was determined by the improved BCR continuous extraction method; and the enzyme kit was used to determine the soil enzyme activity. The test results are shown in Tables 2 and 3.

[0073] Table 2 Effects of greenhouse vegetable field repair agents on soil physical and chemical properties and crop growth

[0074] Analysis of Table 2 shows that compared with CK, the application of 5 g / kg of vegetable field repair agent in the T1 treatment group increased the soil pH value by 1.58 units and the EC value by 5.76 times. The application of 15 g / kg of vegetable field repair agent in the T2 treatment group increased the soil pH value by 2.39 units and the EC value by 6.52 times, which alleviated the soil acidification problem and increased the inorganic nutrients in the surface soil that can be quickly used by plants. The effect of high addition was more obvious; the organic matter content increased by 46.29% and 62.48% respectively, which increased the soil organic nutrient content; analysis Figure 5 It can be seen that the content of effective Cd decreased by 18.26% and 28.57%, respectively, which reduced the bioavailability of Cd in the soil and played a passivation role; the contents of effective nitrogen, effective phosphorus and quick-acting potassium increased by 23.22%~36.45%, 40.50%~48.34%, and 16.74%~30.44%, respectively, which improved soil fertility and nutrients; the fresh weight of the aboveground part of Chinese cabbage increased by 28.11% and 49.79%, respectively, which effectively increased biomass and promoted crop growth; the Cd content of plants decreased by 19.73% and 32.39%, respectively, which reduced the migration of Cd to crops.

[0075] Table 3 Soil enzyme activities in different treatment groups

[0076] Analysis of Table 3 shows that the activities of soil catalase, urease, dehydrogenase and alkaline phosphatase all increased with the use of greenhouse vegetable field repair agents, with increases of 413.76%~71.03%, 52.87%~91.49%, 1.58%~2.37% and 95.4%~145.3% respectively. This shows that soil fertility is enhanced and microbial activity is improved. Figure 6 It can be seen that compared with the control group CK, the proportion of residual Cd in treatment groups T1 and T2 increased by 7.31% and 31.71%, respectively, reducing their biological toxicity and environmental risks.

[0077] In summary, the application of this facility's vegetable field repair agent can alleviate soil acidification, passivate soil heavy metals, fix Cd in the soil and prevent crops from absorbing Cd, increase soil organic matter and nutrient content, promote the growth of cabbage plants, increase biomass, and help increase crop yields.

[0078] Example 4

[0079] This example aims to explore the antibacterial effect of the greenhouse vegetable field repair agent of Example 1 on the cucumber wilt pathogen Fusarium oxysporum, and evaluate the potential efficacy of inhibiting the cucumber wilt pathogen. In order to explore the antibacterial effect of the repair agent, an antibacterial test was first carried out, and its antibacterial effect was verified by an in-dish test. Test pathogenic fungus: Fusarium oxysporum cucumber-specific type Fusarium oxysporum f. sp. Cucumerinum , FOC, this strain is a strong pathogenic strain. The culture medium is PDA medium (potato dextrose agar medium) and sterile culture dishes (diameter 90 mm).

[0080] The first step is material preparation. First, prepare a culture medium for inoculation of pathogens: inoculate Fusarium oxysporum on PDA culture medium, place it in a constant temperature incubator at 28°C for 7 days, and set it aside after the colony grows fully. Then prepare the repair agent suspension: crush and sieve the facility vegetable field repair agent, select soil conditioner particles with a particle size of less than 1 mm, and use sterile water to prepare a facility vegetable field repair agent solution with a soil-water ratio of 1%, 3%, and 5%. And the CK treatment inoculated with FOC alone. The experimental treatments are: CK, T1, T2, and T3.

[0081] The specific steps of the antibacterial test are as follows: absorb 200 μL of the facility vegetable field repair agent solution and evenly apply it to the surface of the PDA culture medium, set up 3 replicates, and then use a hole puncher to take a 5 mm diameter bacterial cake from the cultured pathogenic bacteria strain, turn it upside down in the center of the PDA culture medium, put 1 bacterial cake in each culture dish, and place all the inoculated culture dishes in a constant temperature incubator at 28°C to observe the growth of the colonies, record the changes in the colony diameter every day, and observe for 7 consecutive days.

[0082] In the plate test, this example verifies the antibacterial effect of different concentrations of the facility vegetable field repair agent solution on Fusarium oxysporum. After culturing in a constant temperature incubator at 28°C for 7 days, the culture medium was taken out, the colony diameter was measured by the cross method, and the inhibition rate of mycelial growth was calculated (the specific calculation method is: inhibition rate (%) = (control colony diameter - treatment colony diameter / control colony diameter - bacterial cake diameter) × 100%. The test results are shown in Table 4 and Figure 7 shown.

[0083] Table 4 Inhibition rate of different treatments on cucumber wilt pathogens

[0084] The test results show that the application of the repair agent in the greenhouse vegetable field at different concentrations can inhibit the growth of the cucumber-specific type of Fusarium oxysporum, and within the application range set in the test, the application of the repair agent at a concentration of 1% and 5% has a poor inhibitory effect on the pathogen, while the application of the repair agent at a concentration of 3% has the best effect. That is, the T2 treatment, that is, the 3% application amount of the repair agent, has the best inhibitory effect on Fusarium oxysporum.

[0085] Example 5

[0086] This example aims to further explore and verify the disease suppression function of the facility vegetable field repair agent prepared in Example 1 after being applied to farmland soil. Farmland soil from a certain place in Zhuzhou City, Hunan Province was selected as the test soil, taken from the 0~20 cm soil layer, and ground through a 4 mm sieve after manually selecting and removing larger lumps of soil, stones and plant residues. After sieving, spread it flat on the ground for drying. After air drying, take the mixed soil sample and measure the basic physical and chemical properties of the soil according to the relevant test methods for soil agrochemical analysis (third edition) (ISBN 978-7-109-06644-1). The results of the determination of the basic physical and chemical properties of the soil (CK) are shown in Table 5.

[0087] Table 5 Effects of greenhouse vegetable field repair agents on soil physical and chemical properties

[0088] In this example, cucumber "Jinyan No. 4" was selected as the test crop, and the cucumber seeds were purchased from Tianjin Hongfeng Vegetable Research Co., Ltd. The experiment was carried out in the greenhouse of the West Campus of China Agricultural University. A plastic pot with a diameter of 14 cm, a bottom diameter of 10 cm, and a height of 16 cm was selected. A filter paper was placed at the bottom of the plastic pot, and the sieved soil sample was mixed evenly and then potted. Five treatment groups were set up in the experiment; CK was inoculated with FOC bacterial solution alone; T1 was inoculated with FOC bacterial solution and then 3% of the soil weight of the facility vegetable field repair agent was applied. T2 was inoculated with FOC bacterial solution and then 3% of the soil weight of boron mud doped with kitchen waste biomass charcoal (prepared in Example 1) was applied. T3 was inoculated with FOC bacterial solution and then 3% of the soil weight of amino-functionalized diatom mineral powder (prepared in Example 1) was applied. T4 was inoculated with FOC bacterial solution and then 3% of the soil weight of the growth-promoting and disease-inhibiting compound (prepared in Example 1) was applied. T5 was inoculated with FOC bacterial solution and then 3% of the soil weight of the photosensitive active soil conditioning compound (prepared in Example 1) was applied.

[0089] The specific steps are as follows: The cucumber seeds were disinfected with 2% sodium hypochlorite, soaked for 10 min, and then thoroughly washed with sterilized water to remove the sodium hypochlorite attached to the surface of the seeds. The sterilized cucumber seeds were placed in a high-temperature incubator and cultured in the dark at 25°C to germinate. After 24 hours, the germinated seeds were sown in sterilized soil, and the cucumber seedlings were used for potted experiments when they grew to two leaves and one heart. Before transplanting, except for the CK treatment, each additive was mixed at a mass ratio of 3% to soil. The soil weight was inoculated with a 30% solution of Fusarium oxysporum. The seedlings were transplanted 3 days after the inoculation of the solution, and the plant height and disease index were recorded 10 days after planting.

[0090] The test results are as follows Figure 8 As shown, the disease was most serious when Fusarium oxysporum CK was added alone, and the treatment group with the repair agent reduced the incidence of cucumber plant wilt to a certain extent.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A facility vegetable field repair agent, characterized in that: It includes boron mud-doped kitchen waste biochar, amino-functionalized diatom mineral powder, growth-promoting and disease-inhibiting compounds, and photosensitizing active soil-adjusting compounds.

2. The facility vegetable field repair agent according to claim 1, characterized in that: The method for preparing boron mud-doped kitchen waste biochar comprises: The kitchen waste is crushed into kitchen waste particles of 2-5 mm, and then the kitchen waste particles are mixed with boron mud in a mass ratio of (1-15):1 to obtain a mixed solid material; and then the mixed solid material is roasted to 400-900°C at a heating rate of 2-10°C / min and kept warm for 0.5-6h to obtain the mixed solid material.

3. The greenhouse vegetable field repair agent according to claim 2, characterized in that: The kitchen waste particles have a total solid content of 10.42% to 15.33%, a volatile solid content of 9.74% to 14.15%, a total sugar content of 50.67% to 60.93%, a reducing sugar content of 10.82% to 14.31%, and a starch content of 39.85% to 46.18%; And / or, the mass fractions of organic carbon with molecular weight ≤1 ku, 1-5 ku and ≥5 ku in the kitchen waste particles measured by microfiltration method are 44.39%-80.21%, 6.13%-12.36% and 7.43%-49.48% respectively; And / or, the borax mud contains MgO, SiO2, Fe2O3, and B2O3; the contents of MgO, SiO2, Fe2O3, and B2O3 are 28.85% to 41.00%, 22.96% to 30.11%, 3.79% to 9.93%, and 2.07% to 3.65%, respectively; And / or, the pH value of the boron mud-doped kitchen waste biochar is 8.52-10.59; the EC value is 2.69-5.37 mS / cm; the proportions of C, H, O, N, and S elements are 32.81%-38.73%, 1.12%-2.80%, 11.67%-17.99%, 0.98%-2.11%, and 0.53%-0.80%, respectively; the ash content is 37.57%-52.89%; the specific surface area is 2.26-35.64 m 2 / g, pore volume is 0.001~0.058 cm 3 / g, and the average pore size is 4.30~8.26 nm.

4. The greenhouse vegetable field repair agent according to claim 1, characterized in that: The preparation method of the amino-functionalized diatom mineral powder comprises: heating the diatom mineral powder to 200-800° C. to obtain heat-modified diatom mineral powder; mixing the heat-modified diatom mineral powder with dilute hydrochloric acid at a solid-liquid ratio of 1:(1-10) and stirring at 25-80° C. to separate and obtain acid-heat-modified diatom mineral powder slurry, then washing until the pH value of the supernatant is 6.8-7.2, and drying to obtain acid-heat-modified diatom mineral powder; mixing the acid-heat-modified diatom mineral powder with ethanol, water and a silane coupling agent and stirring to obtain the amino-functionalized diatom mineral powder.

5. The greenhouse vegetable field repair agent according to claim 4, characterized in that: The diatom mineral powder contains CaO, SiO2, MgO, and Fe2O3; the contents of CaO, SiO2, MgO, and Fe2O3 are 39.10%~50.39%, 28.77%~36.02%, 5.46%~8.04%, and 0.10%~0.79%, respectively; and / or, the solid-liquid ratio of the acid-heat-modified diatom mineral powder to ethanol is 1:(2~35); and / or, the amount of water added is 1%~5% of the total volume of the acid-heat-modified diatom mineral powder and ethanol; and / or, the silane coupling agent is at least one of 3-aminopropyltriethoxysilane, 3-aminopropyltrimethoxysilane, N-2aminoethyl-3-aminopropyltrimethoxysilane, N-2-aminoethyl-3-aminopropyltriethoxysilane, and diethylenetriaminopropyltrimethoxysilane.

6. The greenhouse vegetable field repair agent according to claim 1, characterized in that: The specific surface area of ​​the amino-functionalized diatom powder is 5.08-20.75 m 2 / g, and the total pore volume is 0.007~0.050 cm 3 / g, the average pore size is 1.44~13.76 nm, and the Zeta potential is 20.13~55.26 mV.

7. The greenhouse vegetable field repair agent according to claim 1, characterized in that: The preparation method of the growth-promoting and disease-suppressing compound comprises: mixing silkworm excrement with a plant essential oil water dilution solution at a material-liquid ratio of 1 g:5-20 mL to obtain a mixture A; mixing the mixture A with solid kitchen compost to obtain a mixture B; and air-drying or sun-drying the mixture B to obtain the growth-promoting and disease-suppressing compound; Preferably, the pH value of the growth-promoting and disease-suppressing compound is 7.42-8.89, the conductivity is 1.36-3.27 mS / cm, the total nitrogen content is 16.5-20.1 g / kg, the total phosphorus content is 3.14-5.20 g / kg, the available potassium content is 2.11-4.20 g / kg, and the organic matter content is 550-710 g / kg.

8. The greenhouse vegetable field repair agent according to claim 1, characterized in that: The preparation method of the photosensitive active soil-adjusting composite comprises: mixing an organic solvent with water at a volume percentage of 2.0-10% to obtain a special solvent for reaction; mixing melamine, the special solvent for reaction and multi-walled carbon nanotubes, and then ultrasonically separating to obtain a photosensitive active substance A; drying the photosensitive active substance A at 60-100° C. to obtain a photosensitive active substance B; mixing the photosensitive active substance B with magnesium chloride and ferric chloride, and then ultrasonically adjusting the pH value to 9.8-10.2 to obtain a mixed solution; subjecting the mixed solution to a hydrothermal reaction at 100-200° C. for more than 12 hours to separate to obtain a photosensitive active substance C, washing the photosensitive active substance C until the pH value of the washing solution is stable, and drying to obtain the photosensitive active soil-adjusting composite.

9. The method for preparing the greenhouse vegetable field repair agent according to any one of claims 1 to 8, characterized in that: include: The boron mud is mixed with kitchen waste biochar, amino-functionalized diatom powder, growth-promoting and disease-inhibiting compound and photosensitizing active soil conditioning compound, and then ground into a mixture; Preferably, in the grinding, the mass ratio of grinding balls to materials is 20-100:1, and / or the grinding time is 1-12 h, and / or the grinding speed is 200-600 rpm.

10. Use of the vegetable field repair agent according to any one of claims 1 to 8 in at least one of the following aspects: (1) Alleviate soil acidification; (2) Increase soil organic matter and nutrient content; (3) Promote the growth of greenhouse crops and improve the yield and quality of greenhouse crops; (4) Passivate soil heavy metals and alleviate heavy metal stress; (5) Inhibit Fusarium oxysporum; (6) Reduce the incidence of wilt disease in cucumber plants.

Images