High-performance composite soil conditioner for rapidly improving continuous cropping obstacles of strawberries and preparation method of high-performance composite soil conditioner

Abstract

The invention belongs to the technical field of strawberry planting, and relates to a high-performance composite soil conditioner for rapidly improving continuous cropping obstacles of strawberries and a preparation method of the high-performance composite soil conditioner. The conditioner comprises a humic acid-earthworm mixture, coated modified biochar, a modified mineral material, seaweed residues, oyster shell powder, a calcium magnesium phosphate fertilizer and a natural binder. The humic acid is activated through the earthworm extracting solution, so that the biological activity is improved; beneficial bacteria are deeply loaded in pores of the biochar by adopting a vacuum decompression technology, so that the colonization capability of microorganisms is enhanced; mineral materials are activated by citric acid, so that the adsorption capacity on pathogenic bacteria and heavy metals is improved; and finally, the lasting release of the active ingredients is realized through a coating slow-release technology. The conditioner can effectively improve soil micro-ecology, effectively inhibit soil-borne diseases, regulate soil pH and enhance nutrient supply, has the advantages of high efficiency, safety and durability, and is suitable for rapid treatment of strawberry continuous cropping obstacles and soil health restoration.

Description

Technical Field

[0001] This invention belongs to the field of strawberry cultivation technology and relates to a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles and its preparation method. Background Technology

[0002] Continuous cropping obstacles are a common problem in strawberry cultivation, mainly manifested in the deterioration of soil physical and chemical properties, imbalance of microbial flora, aggravation of soil-borne diseases, accumulation of toxic substances, and imbalance of nutrient supply. Long-term continuous cropping leads to the proliferation of pathogens (such as Fusarium and Rhizoctonia) in the soil, a reduction in beneficial microorganisms, soil acidification and compaction, and a decrease in organic matter content, thus affecting the growth and development of strawberries, resulting in reduced yield and quality, and in severe cases, even crop failure. Currently, methods to improve strawberry continuous cropping obstacles mainly include the following categories: chemical methods, such as applying lime to adjust soil pH and using chemical fumigants for soil disinfection. Although these methods can kill pathogens in the short term, they easily lead to a monoculture of soil microorganisms, disrupting the ecological balance. Residual chemicals may also harm the environment and human health, and long-term use can easily lead to drug resistance in pathogens. Biological control, such as Chinese patent CN114258750B, published on March 14, 2023, discloses the inoculation of beneficial microorganisms. This method has some biological control effect, but the survival rate of the microorganisms is low, their colonization ability is weak, and they are easily affected by factors such as temperature, humidity, and pH in complex soil environments, resulting in unstable effects. Furthermore, a single microbial species is insufficient to comprehensively address multiple soil-borne diseases. The application of organic materials, such as Chinese patent application CN107805142A, published on March 16, 2018, specifically discloses the application of amino acids, chitin, etc. This method can improve soil structure and increase organic matter, but the decomposition rate is slow, nutrient release is uneven, and harmful intermediate products may be generated during decomposition, exacerbating autotoxicity. Physical methods, such as high-temperature fumigation and soil steam sterilization, are costly and energy-intensive, making large-scale promotion difficult. They also indiscriminately kill beneficial microorganisms in the soil, disrupting the microecology. While crop rotation and intercropping are eco-friendly methods, they are difficult to implement in specialized, large-scale strawberry growing areas, and their long cycles and slow results do not meet the needs of efficient agricultural production.

[0003] In summary, the above methods have the following problems: limited effectiveness, with most methods targeting only a specific type of problem (such as pathogens or soil acidification), lacking systematic and comprehensive management; poor sustainability, with chemical and physical methods being effective in the short term, but long-term use easily leading to soil ecological degradation; environmental unfriendliness, with problems such as chemical residues and low survival rates of microbial agents restricting their sustainable application; and high cost and complex operation, with methods such as fumigation and steam disinfection requiring large equipment investments and high technical requirements. Summary of the Invention

[0004] To address the above problems, this invention provides a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles and its preparation method, specifically including the following steps:

[0005] Step 1: Mix live earthworms with water at a mass ratio of 1:(3-4), sonicate at 4-5℃ and 40-50kHz for 10-20 minutes, centrifuge at 8000-10000rpm for 10-15 minutes, and take the supernatant to obtain an earthworm extract rich in enzymes (such as protease and cellulase) and active substances.

[0006] Step two: Mix humic acid powder, earthworm extract, and enzyme protectant at a mass ratio of 25:(75-85):(3-4), stir at 120-150 rpm for 8-12 minutes, and ferment at 35-45℃ under microaerobic conditions for 5-7 days to obtain a humic acid-earthworm mixture. This process utilizes the enzyme system within earthworms to "bio-cleave" the macromolecular structure of humic acid, producing more small-molecule fulvic acid and active functional groups. Simultaneously, disease-resistant and life-promoting substances from earthworms are loaded into the pores of the humic acid. This step combines bioactivation and physical modification, significantly enhancing the biostimulatory activity of humic acid and its adsorption capacity for harmful substances.

[0007] Preferably, the enzyme protectant is one or more selected from glycerol, L-proline, β-glucan, sodium citrate, and trehalose. Most preferably, the enzyme protectant is glycerol, sodium citrate, and trehalose in a mass ratio of (2-4):(1-3):(4-6).

[0008] Preferably, the micro-oxygen is nitrogen gas containing 4-6% oxygen.

[0009] Step 3: Crush the biochar to 80-100 mesh, then mix it with 8-12% hydrogen peroxide solution at a mass ratio of 1:(4-5), soak at 25-35℃ for 1.5-2.5 hours, filter, remove the filtrate, and mix the filter residue with the composite microbial fermentation broth at a mass ratio of 1:(1-2). Reduce the pressure by (-0.09)-(-0.1) MPa for 25-35 minutes. During this period, a large number of air bubbles in the mixing system are expelled, and the vacuum environment removes the air from the deep pores inside the biochar. When the pressure returns to normal, the atmospheric pressure will act as a driving force to fill the microbial-rich fermentation broth into the micropores of the biochar. This achieves deep loading of microorganisms, rather than just surface adhesion. Then ferment at 30-35℃ for 1.5-2.5 days, filter, remove the fermentation broth, mix the fermentation material with the coating agent at a mass ratio of 1:(4-5), stir at 60-90 rpm for 8-12 minutes, filter, remove the filtrate, and the filter residue is the coated modified biochar.

[0010] Preferably, the composite microbial fermentation broth, based on water, comprises 10-20 g / L soluble starch, 4-6 g / L glucose, 7-9 g / L peptone, 3-5 g / L yeast extract, 1-2 g / L potassium dihydrogen phosphate, 0.4-0.6 g / L magnesium sulfate heptahydrate, 0.1-0.2 g / L calcium chloride, 0.04-0.06 g / L manganese chloride, 0.4-0.6 g / L chitin powder (300 mesh), and 5×10 8 -7×10 8 CFU / mL of Bacillus amyloliquefaciens and 3×10 8 -5×10 8 CFU / mL of Streptomyces flavus.

[0011] Preferably, the coating agent comprises, based on water, 10-20 mL / L of acetic acid, 25-35 g / L of chitosan, 15-25 g / L of sodium alginate and 4-6 g / L of glycerol.

[0012] Step 4: Crush the mineral material to 180-220 mesh and mix it with a 4-6% citric acid solution at a mass ratio of 1:(1-2). Stir at 55-65℃ for 3.5-4.5 hours. This acid activation process not only converts the insoluble mineral salt into a soluble salt that strawberries can absorb, but more importantly, it forms a rich microporous structure on the surface of the mineral material during the reaction and gives it a positive charge, which greatly enhances its ability to adsorb and fix negatively charged pathogens (such as Fusarium) spores and heavy metal cadmium ions in the soil. Filter, remove the filtrate, and microwave the filter residue at 750-850W for 4-6 minutes to obtain the modified mineral material.

[0013] Preferably, the mineral material includes one or more of phosphate rock powder, marble, zeolite, vermiculite, quartz sand, diatomite, and bentonite. Most preferably, the mineral material includes phosphate rock powder, zeolite, quartz sand, and diatomite in a mass ratio of (7-9):(4-6):(6-8):(8-12).

[0014] Step 5: Add the humic acid-earthworm mixture, coated modified biochar, modified mineral materials, seaweed residue, oyster shell powder, and calcium magnesium phosphate fertilizer into a twin-shaft mixer and stir at 150-250 rpm for 10-15 minutes. Add the natural binder and continue stirring for 15-20 minutes to obtain particles with a diameter of 3-5 mm. Dry at 70-80℃ until the moisture content is ≤10%. Then, spray a coating liquid on the surface of the particles, resulting in a particle weight gain of 5-8%. Then, spray a curing agent, using the same amount as the coating liquid. Cure at 40-50℃ for 1.5-2 hours to obtain a composite soil conditioner.

[0015] Preferably, the mass ratio of the humic acid-earthworm mixture, coated modified biochar, modified mineral material, seaweed residue, oyster shell powder, calcium magnesium phosphate fertilizer and natural binder is (15-25):(11-13):(8-12):(5-7):(7-9):(13-17):(11-13).

[0016] Preferably, the natural binder is a starch aqueous solution with a mass fraction of 12-15%, a sodium carboxymethyl cellulose aqueous solution with a mass fraction of 1-2%, a xanthan gum aqueous solution with a mass fraction of 0.5-1.5%, or a seaweed extract aqueous solution with a mass fraction of 25-30%.

[0017] Preferably, the coating liquid is a sodium alginate solution with a mass fraction of 2-3%, and the curing agent is a calcium chloride solution with a mass fraction of 2.5-3.5%.

[0018] The present invention has the following advantages:

[0019] (1) Multiple conditioning methods to systematically improve soil health: This invention achieves comprehensive regulation of soil physicochemical properties, microbial flora, and nutrient supply through the bio-enzymatic activation of humic acid-earthworm mixture, deep microbial loading of coated modified biochar, microporous structure and charge modification of modified mineral materials, and the synergistic effect of multiple functional components such as seaweed residue and oyster shell powder. Compared with existing single methods, this invention can not only effectively inhibit pathogens and degrade toxic substances, but also continuously release nutrients, improve soil aggregate structure, and enhance soil buffering capacity, fundamentally repairing soils with continuous cropping obstacles.

[0020] (2) Highly efficient bioactivation to enhance soil microbial activity: This invention utilizes active substances such as protease and cellulase in earthworm extract to "bio-enzymatically cleave" humic acid under microaerobic fermentation conditions, generating a large amount of small-molecule fulvic acid and active functional groups, significantly enhancing its biostimulatory activity. Simultaneously, by using vacuum decompression technology, beneficial microorganisms such as Bacillus amyloliquefaciens and Streptomyces flavus are deeply loaded into the micropores of biochar, which not only improves the survival rate of the microorganisms but also prolongs their action time, enhancing the colonization and functional expression of microorganisms in the soil and effectively inhibiting the reproduction of soil-borne pathogens such as Fusarium.

[0021] (3) Sustained release and targeted adsorption enhance the sustainability of soil remediation. This invention uses coating technology and solidification treatment to give the conditioner particles slow-release properties, allowing them to slowly release active ingredients into the soil and avoid nutrient loss and secondary pollution. After activation with citric acid and microwave treatment, the modified mineral materials form abundant micropores on their surface and carry a positive charge, which can specifically adsorb negatively charged pathogen spores and heavy metal ions (such as cadmium) in the soil, achieving targeted remediation with a long-lasting and stable effect.

[0022] (4) Environmentally friendly and ecologically safe: This invention uses all natural or bio-based raw materials, such as earthworm extract, seaweed residue, and oyster shell powder, with no risk of chemical residues, meeting the requirements of green agricultural development. Through the combined use of microorganisms and organic-inorganic materials, the soil's self-regulating ability is enhanced, promoting the restoration of ecological balance and avoiding the damage to the soil micro-ecology caused by traditional chemical methods.

[0023] 5) High applicability and simple operation: The conditioner of this invention is in granular form, which facilitates mechanized application and is highly compatible with existing agronomic practices. It requires no complex equipment or highly skilled operation, making it suitable for large-scale strawberry planting areas. Its rapid improvement effect is also superior to traditional crop rotation or organic improvement methods. Detailed Implementation

[0024] The technical solutions in the embodiments of the invention are described clearly and completely below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1

[0026] Raw material preparation:

[0027] The enzyme protectant consists of glycerol, sodium citrate, and trehalose in a mass ratio of 3:2:5.

[0028] Compound microbial fermentation broth: Based on water, it includes 15 g / L soluble starch, 5 g / L glucose, 8 g / L peptone, 4 g / L yeast extract, 1.5 g / L potassium dihydrogen phosphate, 0.5 g / L magnesium sulfate heptahydrate, 0.15 g / L calcium chloride, 0.05 g / L manganese chloride, 0.5 g / L chitin powder (300 mesh), and 6 × 10 8 CFU / mL of Bacillus amyloliquefaciens (purchased from Shandong Yihao Biotechnology Co., Ltd.) and 4×10 8 CFU / mL of Streptomyces flavus (purchased from Shandong Qilu Chemical Technology Co., Ltd.)

[0029] Coating agent: Based on water, it consists of 15 mL / L acetic acid, 30 g / L chitosan, 20 g / L sodium alginate, and 5 g / L glycerol.

[0030] Mineral materials: phosphate rock powder, zeolite, quartz sand and diatomaceous earth, in a mass ratio of 8:5:7:10.

[0031] The composition of calcium magnesium phosphate fertilizer: effective P2O5 mass fraction ≥15%, SiO2 mass fraction ≥12%, MgO mass fraction ≥10%.

[0032] Step 1: Mix live earthworms with water at a mass ratio of 1:3.5, sonicate at 4.5℃ and 45kHz for 15 minutes, centrifuge at 9000rpm for 13 minutes, and collect the supernatant to obtain earthworm extract.

[0033] Step 2: Mix humic acid powder, earthworm extract and enzyme protectant at a mass ratio of 25:80:3.5, stir at 130 rpm for 10 min, and ferment at 40℃ with micro-aerobic fermentation (introducing nitrogen gas containing 5% oxygen) for 6 days to obtain humic acid-earthworm mixture.

[0034] Step 3: Crush the biochar to 90 mesh, then mix it with a 10% hydrogen peroxide solution at a mass ratio of 1:4.5, soak at 30℃ for 2 hours, filter, remove the filtrate, mix the filter residue with the composite microbial fermentation broth at a mass ratio of 1:1.5, reduce the pressure to -0.095 MPa for 30 minutes, then ferment at 32℃ for 2 days, filter, remove the fermentation broth, mix the fermentation material with the coating agent at a mass ratio of 1:4.5, stir at 80 rpm for 10 minutes, filter, remove the filtrate, and the filter residue is the coated modified biochar.

[0035] Step 4: Crush the mineral material to 200 mesh, mix it with a 5% citric acid solution at a mass ratio of 1:1.5, stir at 60℃ for 4 hours, filter, remove the filtrate, microwave the filter residue at 800W for 5 minutes to obtain the modified mineral material.

[0036] Step 5: Add the humic acid-earthworm mixture, coated modified biochar, modified mineral materials, seaweed residue, oyster shell powder, and calcium magnesium phosphate fertilizer into a twin-shaft mixer and stir at 200 rpm for 13 minutes. Add a 1.5% sodium carboxymethyl cellulose aqueous solution and continue stirring for 18 minutes to obtain particles with a diameter of 3-5 mm. Dry at 75℃ until the moisture content is ≤10%. Then, spray a 2.5% sodium alginate solution onto the surface of the particles, resulting in a particle weight gain of 6-7%. Then, spray a 3% calcium chloride solution, using the same amount as the sodium alginate solution. Cure at 45℃ for 1.8 hours to obtain a composite soil conditioner.

[0037] The mass ratio of the humic acid-earthworm mixture, coated modified biochar, modified mineral materials, seaweed residue, oyster shell powder, calcium magnesium phosphate fertilizer, and sodium carboxymethyl cellulose aqueous solution is 20:12:10:6:8:14:12.

[0038] Experimental Example 1

[0039] The samples were collected from soils with continuous cropping obstacles (pH 5.2, organic matter 12.5 g / kg, and high number of pathogens) where strawberries had been continuously grown for more than 3 years.

[0040] Strawberry variety: "Hongyan" strawberry seedlings (healthy and disease-free, seedlings of uniform age).

[0041] Experimental group: The composite soil conditioner (100g / m³) prepared in Example 1 of this invention 2 ).

[0042] Control group 1: No conditioning agents were applied (blank control).

[0043] Control group 2: Application of conventional soil conditioner (lime 50g / m³) 2 +200g / m³ well-rotted organic fertilizer 2 ).

[0044] Experimental design: randomized block design, with 3 replicates per treatment group, for a total of 9 plots, each plot having an area of ​​10 m². 2 .

[0045] Experimental procedure: Mix the soil from the continuous cropping obstacle evenly, remove stones and plant debris, and distribute it into each plot at a soil depth of 20cm.

[0046] Before the experiment began (day 0), initial soil samples were collected to determine basic parameters (pH, organic matter, pathogen count, and beneficial microorganism count). After the conditioner was applied, it was thoroughly mixed with the soil.

[0047] All treatment groups were irrigated once to bring the soil moisture content to 60% of field capacity.

[0048] Strawberry cultivation: Seven days after the conditioner was applied, strawberry seedlings were planted in each plot with a spacing of 20cm×30cm. All treatment groups adopted the same field management measures (refer to "High-Efficiency Strawberry Cultivation", edited by Yang Lei and Yang Li) to avoid interference from other factors.

[0049] Data Collection and Monitoring: Soil samples were collected from the 0-20 cm soil layer at 30, 60, and 90 days after conditioner application for analysis of soil physicochemical properties and microbial abundance. Soil pH was determined using the potentiostatic method (soil-to-water ratio 1:2.5). Soil organic matter was analyzed using the potassium dichromate oxidation method. Soil microbial abundance was determined using the dilution plate method. Pathogens: Fusarium and Rhizoctonia solani were analyzed using selective culture media (PDA medium + antibiotics). Beneficial microorganisms: Bacillus amyloliquefaciens and Streptomyces flavus were analyzed using specific culture media.

[0050] Strawberry growth indicators: 60 days and 90 days after planting, 10 strawberry plants were randomly selected from each plot, and plant height, root length, above-ground fresh weight and underground fresh weight were measured.

[0051] Yield and quality: At harvest time (90 days after planting), the number of fruits per plant, the weight of a single fruit and the total yield of each plot were recorded, and the soluble solids content of the fruit was measured (using a handheld refractometer).

[0052] Table 1 Changes in soil physicochemical properties

[0053]

[0054] Table 2. Changes in soil microbial abundance (10) 5 CFU / g)

[0055]

[0056] Table 3. Strawberry growth indicators (90 days after planting)

[0057] Plant height (cm) Root length (cm) Fresh weight of above-ground parts (g / plant) Fresh weight of underground parts (g / plant) Control group 1 15.2 12.5 25.3 8.5 Control group 2 17.8 14.2 30.5 10.2 experimental group 22.5 18.0 45.8 15.6

[0058] Table 4. Strawberry Yield and Quality (Harvest Period)

[0059] Number of fruits per plant Single fruit weight (g) <![CDATA[Output (kg / m 2 )]]> Soluble solids content (%) Control group 1 8.5 15.2 1.29 8.5 Control group 2 10.2 16.8 1.71 9.0 experimental group 15.6 18.5 2.89 10.5

[0060] As shown in Tables 1-4, the composite soil conditioner prepared in this invention can rapidly improve the physicochemical properties of soils affected by continuous strawberry cropping obstacles, significantly increasing soil pH and organic matter content. The experimental group effectively inhibited the reproduction of soil pathogens (Fusarium and Rhizoctonia) while promoting the growth of beneficial microorganisms (Bacillus amyloliquefaciens and Streptomyces flavus). The experimental group significantly promoted the growth of strawberry plants, including plant height, root length, and biomass. The experimental group significantly improved strawberry yield and fruit quality, with significantly higher numbers of fruits per plant, single fruit weight, yield, and soluble solids content compared to the control group.

[0061] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles, characterized in that, Includes the following steps: Step 1: Mix live earthworms with water at a mass ratio of 1:(3-4), ultrasonically crush at 4-5℃, centrifuge, and take the supernatant to obtain earthworm extract; Step 2: Mix humic acid powder, earthworm extract and enzyme protectant at a mass ratio of 25:(75-85):(3-4) and stir. Perform micro-aerobic fermentation to obtain humic acid-earthworm mixture. Step 3: After crushing the biochar, mix it with hydrogen peroxide solution at a mass ratio of 1:(4-5) and soak it. Filter and remove the filtrate. Mix the filter residue with the compound microbial fermentation broth at a mass ratio of 1:(1-2). Reduce the pressure by (-0.09)-(-0.1) MPa for 25-35 minutes, and then ferment at 30-35℃ for 1.5-2.5 days. Filter and remove the fermentation broth. Mix the fermentation material with the coating agent at a mass ratio of 1:(4-5), stir, filter, remove the filtrate, and the filter residue is the coated modified biochar. Step 4: After crushing the mineral material, mix it with citric acid solution at a mass ratio of 1:(1-2), filter, remove the filtrate, and microwave the filter residue to obtain the modified mineral material. Step 5: Mix the humic acid-earthworm mixture, coated modified biochar, modified mineral materials, seaweed residue, oyster shell powder, calcium magnesium phosphate fertilizer and natural binder evenly in the mass ratio of (15-25):(11-13):(8-12):(5-7):(7-9):(13-17):(11-13) to obtain preliminary granules. Dry them until the moisture content is ≤10%. Then spray the coating liquid on the surface of the granules. The granule weight gain rate is 5-8%. Then spray the curing agent. The amount of curing agent is the same as that of the coating liquid. After curing, the composite soil conditioner is obtained.

2. The preparation method of a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles according to claim 1, characterized in that, The enzyme protectant mentioned in step two is one or more of glycerol, L-proline, β-glucan, sodium citrate, and trehalose.

3. The preparation method of a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles according to claim 2, characterized in that, The enzyme protectant is glycerol, sodium citrate and trehalose in a mass ratio of (2-4):(1-3):(4-6).

4. The preparation method of a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles according to claim 1, characterized in that, The composite microbial fermentation broth described in step three, based on water, comprises 10-20 g / L soluble starch, 4-6 g / L glucose, 7-9 g / L peptone, 3-5 g / L yeast extract, 1-2 g / L potassium dihydrogen phosphate, 0.4-0.6 g / L magnesium sulfate heptahydrate, 0.1-0.2 g / L calcium chloride, 0.04-0.06 g / L manganese chloride, 0.4-0.6 g / L chitin powder, and 5 × 10 8 -7×10 8 CFU / mL of Bacillus amyloliquefaciens and 3×10 8 -5×10 8 CFU / mL of Streptomyces flavus.

5. The preparation method of a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles according to claim 1, characterized in that, The coating agent described in step three, based on water, comprises 10-20 mL / L of acetic acid, 25-35 g / L of chitosan, 15-25 g / L of sodium alginate, and 4-6 g / L of glycerol.

6. The method for preparing a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles according to claim 1, characterized in that, The mineral materials mentioned in step four include one or more of the following: phosphate rock powder, marble, zeolite, vermiculite, quartz sand, diatomite, and bentonite.

7. The preparation method of a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles according to claim 6, characterized in that, The mineral materials include phosphate rock powder, zeolite, quartz sand and diatomaceous earth, in a mass ratio of (7-9):(4-6):(6-8):(8-12).

8. The preparation method of a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles according to claim 1, characterized in that, The natural binder mentioned in step five is a starch aqueous solution with a mass fraction of 12-15%, a sodium carboxymethyl cellulose aqueous solution with a mass fraction of 1-2%, a xanthan gum aqueous solution with a mass fraction of 0.5-1.5%, or a seaweed extract aqueous solution with a mass fraction of 25-30%.

9. The method for preparing a high-performance composite soil conditioner for rapidly improving strawberry continuous cropping obstacles according to claim 1, characterized in that, The coating solution mentioned in step five is a sodium alginate solution with a mass fraction of 2-3%, and the curing agent is a calcium chloride solution with a mass fraction of 2.5-3.5%.

10. The composite soil conditioner prepared by the method according to any one of claims 1-9.

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