Soil remediation conditioner for durian breeding as well as preparation and application of soil remediation conditioner

Abstract

The invention relates to the field of soil remediation conditioners, and particularly provides a soil remediation conditioner for durian breeding as well as preparation and application of the soil remediation conditioner. The soil remediation conditioner is prepared from the following components in parts by weight: 35 to 45 parts of organic matter fertilizer, 18 to 22 parts of biochar, 22 to 28 parts of humic acid, 8 to 12 parts of vermiculite, 10 to 14 parts of perlite, 12 to 18 parts of shell powder, 6 to 10 parts of mycorrhizal fungi, EM bacteria and other mixed bacteria, 8 to 12 parts of wormcast, 4 to 6 parts of amino acid chelate solution, 8 to 12 parts of coco coir and 4 to 6 parts of adhesive. The specific surface area of the biochar is 32 m < 2 > / g, and the particle size is 40 meshes; the soil remediation conditioner is applied to durian planting soil remediation, has the effects of improving the physical structure of soil, improving the air permeability and water retention of the soil, increasing the fertility of the soil and providing rich nutrition for breeding and growth of durian seedlings, and has great application potential for the durian industry.

Description

Technical Field

[0001] The invention belongs to the field of soil remediation conditioners and relates to a soil remediation conditioner for durian breeding and a preparation and application thereof. Background Art

[0002] Soil conditions are crucial for durian seedlings to establish roots and absorb nutrients. Durian trees have a well-developed root system and require deep, fertile, loose soil. The upper soil layer should be loose and breathable, allowing the roots to breathe and expand; the lower layer should be thicker and more stable, providing stable support for the seedling. Furthermore, the soil's drainage and irrigation systems must be good to prevent waterlogging that can lead to root rot. Furthermore, the soil's pH should be moderate, preferably slightly acidic to neutral. Ordinary soil will not meet these requirements.

[0003] Currently, there are agronomic, chemical, and biological methods for improving durian soil. Agronomic methods involve deep tillage before planting and intertillage during the growing season to increase soil porosity, break up topsoil compaction, and enhance root permeability. However, due to limitations in soil fertility and pH regulation, the application of agronomic measures is limited. Chemical methods use amendments to adjust soil pH, thereby improving soil quality. However, the large-scale use of inorganic and organic amendments can pose biosafety risks, toxic residues, and the accumulation of harmful substances in the fruit. Biological methods involve adaptive crop rotations of plants, such as legumes, which help fix nitrogen, improve soil quality, reduce soil-borne diseases, increase biodiversity, and improve soil structure. The application of microbial agents improves the growth environment of plant roots and enhances their resistance to disease and stress. Biological measures have a longer treatment cycle and are slow to show results.

[0004] Chinese patent CN103664390A discloses a durian cultivation soil composed of bentonite, dead moss, ordinary mineral soil, crop straw, animal manure, urea, calcium persulfate, and sulfur powder. Both crop straw and animal manure are organic, environmentally friendly raw materials that not only provide abundant nutrients for durian but also fully degrade under the action of dead moss, eliminating any residual chemical elements in the durian. Furthermore, by adding sulfur powder and then covering it with water, the bactericidal effect of sulfur powder is utilized to disinfect the mixed cultivation soil, eliminating the need for a separate disinfection process and further reducing costs. However, this technical solution has the following shortcomings: It lacks a microbial system, making it impossible to create a healthy soil microbial environment, making it difficult to improve root nutrient absorption efficiency and disease resistance; it relies on bentonite (which has strong adsorption but poor air permeability), resulting in limited improvement in soil compaction; and using sulfur powder for disinfection can lead to soil acidification or sulfur residue, and long-term use can affect soil pH and crop safety.

[0005] Chinese patent CN108307983A discloses a culture soil for durian, the components of which include peat, bentonite, sawdust, corn stalks, dried pig manure, bagasse, microbial fertilizer, and sulfur powder. The culture soil of the present invention has a simple proportion and is easy to use. While reducing the cost of traditional culture media, it effectively guarantees the nutritional content of durian. It also has high biological efficiency, a simple method, low cost, and is easy to promote. However, this technical solution has the following shortcomings: the microbial fertilizer accounts for 1%-10%, a large span and no optimization, which may lead to insufficient bacterial activity or excessive cost; components such as sawdust and bagasse are easily decomposed and compacted, lacking a stable porous structure, resulting in poor long-term soil water retention and air permeability; the use of sulfur powder for disinfection carries a risk of chemical residues similar to that in CN103664390A; and the peat and bentonite account for as much as 40%-60%, resulting in high raw material costs.

[0006] Therefore, there is a need for a soil remediation conditioner specifically for durian breeding that can not only improve soil compaction and air permeability, but also improve the soil, make it fertile, promote durian growth, and at the same time ensure biological safety and no toxic residues, and avoid the accumulation of harmful substances in the fruit. Summary of the Invention

[0007] In order to solve the deficiencies of the prior art, the present invention provides the following technical solutions:

[0008] The present invention provides a soil remediation conditioner for durian breeding, which is composed of the following raw materials in parts by weight:

[0009] 35-45 parts fermented organic fertilizer, 18-22 parts biochar, 22-28 parts humic acid, 8-12 parts vermiculite, 10-14 parts perlite, 12-18 parts shell powder, 6-10 parts mixed inoculant, 8-12 parts vermicompost, 4-6 parts amino acid chelate, 8-12 parts coconut coir, 4-6 parts adhesive;

[0010] The biochar is rice husk biochar screened with a 40-mesh sieve; the biochar is ash charcoal from the combustion of biomass, and the biomass is selected from rice husk;

[0011] The mixed inoculant comprises a mycorrhizal fungal inoculant, an EM inoculant, and an inoculant carrier, wherein the weight ratio of the mycorrhizal fungal inoculant, the EM inoculant, and the inoculant carrier is 1:1:10, and the inoculant carrier is selected from at least one of wheat bran, rice husk, or corn cob;

[0012] The amino acid chelate solution is prepared by dissolving amino acid chelate solid powder in water to prepare a 0.1% w / v solution;

[0013] The adhesive comprises chitosan and starch, the weight ratio of chitosan to starch is 1-3:1, and the concentration of the adhesive is 5%-10% w / v.

[0014] Preferably, the soil remediation conditioner for durian breeding is composed of the following raw materials in parts by weight:

[0015] 40 parts of fermented and decomposed organic fertilizer, 20 parts of biochar, 25 parts of humic acid, 10 parts of vermiculite, 10 parts of perlite, 15 parts of shell powder, 10 parts of coconut bran, 8 parts of mixed bacterial agent, 10 parts of earthworm castings, 5 parts of amino acid chelate solution, and 5 parts of adhesive.

[0016] The present invention also provides a method for preparing the soil remediation conditioner, comprising the following steps:

[0017] (1) crushing fermented and decomposed organic fertilizer, biochar, humic acid, vermiculite, perlite, shell powder, and coconut husk into 60-100 mesh respectively, and sieving for later use;

[0018] (2) mixing the mycorrhizal fungus agent, the EM agent, and the agent carrier in a ratio of 1:1:10 to prepare a mixed agent for standby use, wherein the agent carrier comprises at least one of wheat bran, rice husk, or corn cob;

[0019] (3) Dry the earthworm castings, crush them and pass them through a 40-mesh sieve for later use;

[0020] (4) dissolving the amino acid chelate solid powder in water to prepare a 0.1% w / v solution for later use;

[0021] (5) mixing chitosan and starch in a weight ratio of 1-3:1, adding water, heating, stirring and dissolving to prepare an adhesive with a concentration of 5%-10% w / v;

[0022] (6) mixing, by weight, 35-45 parts of the fermented and decomposed organic fertilizer obtained in step (1), 18-22 parts of biochar, 22-28 parts of humic acid, 8-12 parts of vermiculite, 10-14 parts of perlite, 12-18 parts of shell powder, 8-12 parts of coconut husk, 6-10 parts of the mixed bacterial agent prepared in step (2), 8-12 parts of the earthworm castings obtained in step (3), 4-6 parts of the amino acid chelate solution prepared in step (4), and 4-6 parts of the adhesive prepared in step (5) to obtain a mixture;

[0023] (7) After the mixture is granulated, a soil remediation conditioner is obtained.

[0024] Preferably, in step (6), the mixing is performed by tossing until the mixture is uniformly mixed;

[0025] Step (7) is specifically as follows: the granules obtained by granulating the mixture are dried at 25° C.-30° C. until the moisture content is less than 12%, thereby obtaining a soil remediation conditioner.

[0026] Preferably, the mixture is granulated to obtain particles with a diameter of 2-4 mm.

[0027] The present invention also provides the use of the above-mentioned soil remediation conditioner in remediating durian breeding soil, and the specific operation includes the following steps:

[0028] (1) Apply the conditioner evenly over the planting area at a rate of 15 grams per square meter;

[0029] (2) tilling the soil to fully mix the soil remediation agent with the soil;

[0030] (3) Water thoroughly to ensure that the roots of the seedlings are in contact with the conditioner.

[0031] Beneficial effects of the present invention:

[0032] (1) The patented soil remediation conditioner for durian breeding can significantly improve soil structure. Through the scientifically proportioned biochar, humic acid, vermiculite, perlite and other ingredients, it can effectively improve the physical structure of the soil. The porosity of biochar can increase the porosity of the soil, making the soil looser, thereby breaking the compacted state and improving the air permeability and water permeability of the soil. At the same time, humic acid helps to agglomerate soil particles, enhance soil stability, prevent the soil from becoming compacted again, and create a good physical environment for the growth of durian roots.

[0033] (2) This patented soil remediation conditioner for durian breeding contains rich organic fertilizers, amino acid chelates, shell powder and various nutrients, which can provide a comprehensive and long-lasting nutrient supply to the soil. Organic fertilizers slowly decompose in the soil and continuously release a large number of elements such as nitrogen, phosphorus and potassium, ensuring that durian can obtain sufficient nutrients at different growth stages. The trace elements and amino acids in the amino acid chelates are easily absorbed by durian, promoting its metabolism and growth and development. Shell powder supplements calcium and regulates the pH of the soil, further optimizing the chemical properties of the soil, so that the soil fertility can be maintained and improved over the long term.

[0034] (3) The addition of mycorrhizal fungi and EM agents is a major feature of this patented conditioner. Mycorrhizal fungi form a symbiotic relationship with the durian root system, helping durian to absorb water and nutrients from the soil more efficiently, improving nutrient utilization efficiency, and enhancing durian's drought and disease resistance. The various beneficial microorganisms in the EM agent can form a dominant bacterial community in the soil, inhibit the growth of harmful pathogens, and reduce the occurrence of soil-borne diseases. In addition, the bioactive substances produced by these microorganisms during their growth and metabolism can also stimulate the growth of durian, significantly improving its growth indicators such as plant height, stem thickness, and number of leaves, ultimately improving fruit yield and quality.

[0035] (4) The adhesive used in this patent is a natural chitosan and starch composite adhesive with good biocompatibility and biodegradability. It can be naturally decomposed in the soil without leaving any toxic or harmful residues. At the same time, the other ingredients in the formula are also derived from natural or fully fermented organic materials, and have no adverse effects on the soil ecological environment or human health, ensuring the ecological safety and environmental protection of the entire process from soil improvement to durian planting and fruit production.

[0036] (5) This soil conditioner for durian breeding is suitable for durian plantations in different regions and with different soil types. Whether it is a garden with serious soil compaction or a plot with insufficient fertility, this conditioner can play a good role in repairing and improving the soil. Moreover, its method of use is simple and easy, and it is easily accepted and applied by the majority of durian growers. It has broad market prospects and practical application value, and can be widely promoted in the durian planting industry, providing strong support for improving durian yield and quality and promoting industrial development. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 Soil improvement effect for durian breeding. DETAILED DESCRIPTION

[0038] The specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0039] Example 1: Preparation and application of soil remediation conditioner

[0040] (1) crushing fermented and decomposed organic fertilizer, biochar, humic acid, vermiculite, perlite, shell powder, and coconut husk into 80 meshes respectively, and sieving them for later use;

[0041] (2) mixing the mycorrhizal fungus agent, the EM agent and the agent carrier in a ratio of 1:1:10 to prepare a mixed agent for standby use, wherein the agent carrier is wheat bran;

[0042] (3) Dry the earthworm castings, crush them and pass them through a 40-mesh sieve for later use;

[0043] (4) dissolving the amino acid chelate solid powder in water to prepare a 0.1% w / v solution for later use;

[0044] (5) Chitosan and starch were mixed in a weight ratio of 2:1, and water was added, heated, stirred and dissolved to prepare an adhesive with a concentration of 8% w / v;

[0045] (6) 40 parts of the fermented and decomposed organic fertilizer obtained in step (1), 20 parts of biochar, 25 parts of humic acid, 10 parts of vermiculite, 10 parts of perlite, 15 parts of shell powder, 10 parts of coconut husk, 8 parts of the mixed bacterial agent prepared in step (2), 10 parts of the earthworm castings obtained in step (3), 5 parts of the amino acid chelate solution prepared in step (4), and 5 parts of the adhesive prepared in step (5) are mixed and tossed until uniformly mixed to obtain a mixture;

[0046] (7) The mixture was granulated to form particles with a diameter of 3 mm, and the obtained particles were dried at 30° C. until the moisture content was less than 10%, thereby obtaining a soil remediation conditioner.

[0047] (8) Store the soil remediation conditioner in a cool, dry, dark environment until ready for use.

[0048] Directions:

[0049] 1. Spread the soil remediation conditioner evenly in the planting area, with a dosage of 15 grams per square meter.

[0050] 2. Carry out tillage operations to fully mix the conditioner with the soil to ensure that the roots of the seedlings can fully contact with the conditioner and create a good soil environment for root growth.

[0051] 3. Water thoroughly to ensure that the roots of the seedlings can absorb water.

[0052] 4. After one growth cycle, the growth indicators of the durian in Implementation 1 were tested and it was found that its growth indicators were the highest and the growth rate was the fastest. The results are as follows:

[0053] Table 1. Statistics of growth indicators of durian plants

[0054]

[0055] Table 2. Statistics of growth rates of various growth indicators of durian plants

[0056]

[0057] Example 2: Preparation and application of soil remediation conditioner

[0058] (1) crushing fermented and decomposed organic fertilizer, biochar, humic acid, vermiculite, perlite, shell powder, and coconut husk into 100 mesh respectively, sieving and setting aside;

[0059] (2) Mixing the mycorrhizal fungus agent, the EM agent, and the agent carrier in a ratio of 1:1:10 to prepare a mixed agent for standby use, wherein the agent carrier is rice husk;

[0060] (3) Dry the earthworm castings, crush them and pass them through a 40-mesh sieve for later use;

[0061] (4) Dissolve the amino acid chelate in water to prepare a 0.1% w / v solution for later use;

[0062] (5) Chitosan and starch were mixed in a weight ratio of 1:1, and water was added, heated, stirred, and dissolved to prepare an adhesive with a concentration of 6% w / v;

[0063] (6) 35 parts of the fermented and decomposed organic fertilizer obtained in step (1), 18 parts of biochar, 22 parts of humic acid, 8 parts of vermiculite, 12 parts of perlite, 12 parts of shell powder, 8 parts of coconut husk, 6 parts of the mixed bacterial agent prepared in step (2), 8 parts of the earthworm castings obtained in step (3), 4 parts of the amino acid chelate solution prepared in step (4), and 4 parts of the adhesive prepared in step (5) are mixed and tossed until uniformly mixed to obtain a mixture;

[0064] (7) The mixture was granulated to form particles with a diameter of 2 mm, and the obtained particles were dried at 28° C. until the moisture content was less than 8%, thereby obtaining a soil remediation conditioner.

[0065] (8) Store the soil remediation conditioner in a cool, dry, dark environment until ready for use.

[0066] Directions:

[0067] 1. Spread the soil remediation conditioner evenly in the planting area, with a dosage of 15 grams per square meter.

[0068] 2. Carry out tillage operations to fully mix the conditioner with the soil to ensure that the roots of the seedlings can fully contact with the conditioner and create a good soil environment for root growth.

[0069] 3. Water thoroughly to ensure that the roots of the seedlings can absorb water.

[0070] 4. After one growth cycle, the growth indicators of the durians in Implementation 2 were tested, and the results were as follows:

[0071] Table 3. Statistics of growth indicators of durian plants

[0072]

[0073] Table 4. Statistics of growth rates of various growth indicators of durian plants

[0074]

[0075]

[0076] Example 3: Preparation and application of soil remediation conditioner

[0077] (1) crushing fermented and decomposed organic fertilizer, biochar, humic acid, vermiculite, perlite, shell powder, and coconut husk into 60 meshes respectively, and sieving them for later use;

[0078] (2) Mixing the mycorrhizal fungal agent, the EM agent, and the agent carrier in a ratio of 1:1:10 to prepare a mixed agent for standby use, wherein the agent carrier is a corn cob;

[0079] (3) Dry the earthworm castings, crush them and pass them through a 40-mesh sieve for later use;

[0080] (4) Dissolve the amino acid chelate in water to prepare a 0.1% w / v solution for later use;

[0081] (5) Chitosan and starch were mixed in a weight ratio of 3:1, and water was added, heated, stirred and dissolved to prepare an adhesive with a concentration of 10% w / v;

[0082] (6) 45 parts of the fermented and decomposed organic fertilizer obtained in step (1), 22 parts of biochar, 28 parts of humic acid, 12 parts of vermiculite, 14 parts of perlite, 18 parts of shell powder, 12 parts of coconut husk, 10 parts of the mixed bacterial agent prepared in step (2), 12 parts of the earthworm castings obtained in step (3), 6 parts of the amino acid chelate solution prepared in step (4), and 6 parts of the adhesive prepared in step (5) are mixed and tossed until uniformly mixed to obtain a mixture;

[0083] (7) The mixture was granulated to form particles with a diameter of 4 mm, and the obtained particles were dried at 25° C. until the moisture content was less than 12%, thereby obtaining a soil remediation conditioner.

[0084] (8) Store the soil remediation conditioner in a cool, dry, dark environment until ready for use.

[0085] Directions:

[0086] 1. Spread the soil remediation conditioner evenly in the planting area, with a dosage of 15 grams per square meter.

[0087] 2. Carry out tillage operations to fully mix the conditioner with the soil to ensure that the roots of the seedlings can fully contact with the conditioner and create a good soil environment for root growth.

[0088] 3. Water thoroughly to ensure that the roots of the seedlings can absorb water.

[0089] 4. After one growth cycle, the growth indicators of the durians in Implementation 3 were tested, and the results were as follows:

[0090] Table 5. Statistics of growth indicators of durian plants

[0091]

[0092] Table 6. Statistics of growth rates of various growth indicators of durian plants

[0093]

[0094] Comparative Example 1:

[0095] A soil remediation conditioner for durian breeding is composed of the following raw materials in parts by weight: 40 parts of garden soil, 20 parts of biochar, 25 parts of humic acid, 10 parts of vermiculite, 10 parts of perlite, 15 parts of shell powder, 10 parts of earthworm castings, 5 parts of amino acid chelate solution, 10 parts of coconut bran, and 5 parts of adhesive.

[0096] (1) Grind the farmland soil, biochar, humic acid, vermiculite, perlite, shell powder, and coconut husk into 60 meshes respectively, and sieve them for later use;

[0097] (2) Dry the earthworm castings, crush them and pass them through a 40-mesh sieve for later use;

[0098] (3) Dissolve the amino acid chelate in water to prepare a 0.1% w / v solution for later use;

[0099] (4) Chitosan and starch were mixed in a weight ratio of 3:1, and water was added, heated, stirred and dissolved to prepare an adhesive with a concentration of 10% w / v;

[0100] (5) 40 parts of the fermented and decomposed organic fertilizer obtained in step (1), 20 parts of biochar, 25 parts of humic acid, 10 parts of vermiculite, 10 parts of perlite, 15 parts of shell powder, 10 parts of coconut husk, 10 parts of the earthworm castings obtained in step (2), 5 parts of the amino acid chelate solution prepared in step (3), and 5 parts of the adhesive prepared in step (4) are mixed and tossed until uniformly mixed to obtain a mixture;

[0101] (6) The mixture was granulated to form particles with a diameter of 4 mm, and the obtained particles were dried at 25° C. until the moisture content was less than 12%, thereby obtaining a soil remediation conditioner.

[0102] (7) Store the soil remediation conditioner in a cool, dry, dark environment for future use.

[0103] Directions:

[0104] 1. Spread the soil remediation conditioner evenly in the planting area, with a dosage of 15 grams per square meter.

[0105] 2. Carry out tillage operations to fully mix the conditioner with the soil to ensure that the roots of the seedlings can fully contact with the conditioner and create a good soil environment for root growth.

[0106] 3. Water thoroughly to ensure that the roots of the seedlings can absorb water.

[0107] 4. After one growth cycle, the growth indicators of the durian in Example 1 were tested, and the results were as follows:

[0108] Table 7. Statistics of growth indicators of durian plants

[0109]

[0110] Table 8. Statistics of growth rates of various growth indicators of durian plants

[0111]

[0112]

[0113] Comparative Example 2:

[0114] A soil remediation conditioner for durian breeding is composed of the following raw materials in parts by weight: 40 parts fermented and decomposed organic fertilizer, 20 parts biochar, 25 parts humic acid, 10 parts vermiculite, 10 parts perlite, 15 parts shell powder, 10 parts earthworm castings, 5 parts amino acid chelate, 10 parts coconut husk, and 5 parts adhesive. The preparation method is the same as in Example 1, except that the mycorrhizal fungal agent and EM agent are omitted.

[0115] (1) crushing fermented and decomposed organic fertilizer, biochar, humic acid, vermiculite, perlite, shell powder, and coconut husk into 60 meshes respectively, and sieving them for later use;

[0116] (2) Dry the earthworm castings, crush them and pass them through a 40-mesh sieve for later use;

[0117] (3) Dissolve the amino acid chelate in water to prepare a 0.1% w / v solution for later use;

[0118] (4) Chitosan and starch were mixed in a weight ratio of 3:1, and water was added, heated, stirred and dissolved to prepare an adhesive with a concentration of 10% w / v;

[0119] (5) 40 parts of the fermented and decomposed organic fertilizer obtained in step (1), 20 parts of biochar, 25 parts of humic acid, 10 parts of vermiculite, 10 parts of perlite, 15 parts of shell powder, 10 parts of coconut husk, 10 parts of the earthworm castings obtained in step (2), 5 parts of the amino acid chelate solution prepared in step (3), and 5 parts of the adhesive prepared in step (4) are mixed and tossed until uniformly mixed to obtain a mixture;

[0120] (6) The mixture was granulated to form particles with a diameter of 4 mm, and the obtained particles were dried at 25° C. until the moisture content was less than 12%, thereby obtaining a soil remediation conditioner.

[0121] (7) Store the soil remediation conditioner in a cool, dry, dark environment for future use.

[0122] Directions:

[0123] 1. Spread the soil remediation conditioner evenly in the planting area, with a dosage of 15 grams per square meter.

[0124] 2. Carry out tillage operations to fully mix the conditioner with the soil to ensure that the roots of the seedlings can fully contact with the conditioner and create a good soil environment for root growth.

[0125] 3. Water thoroughly to ensure that the roots of the seedlings can absorb water.

[0126] 4. After one growth cycle, the growth indicators of the durians in Example 2 were tested, and the results were as follows:

[0127] Table 9. Statistics of growth indicators of durian plants

[0128]

[0129] Table 10. Statistics of growth rates of various growth indicators of durian plants

[0130]

[0131] Comparative Example 3:

[0132] 1. Blank control group, no soil conditioner was applied.

[0133] 2. Water thoroughly to ensure that the roots of the seedlings can absorb water.

[0134] 3. After one growth cycle, the growth indicators of the durian in Example 3 were tested, and the results were as follows:

[0135] Table 11. Statistics of growth indicators of durian plants

[0136]

[0137] Table 12. Statistics of growth rates of various growth indicators of durian plants

[0138]

[0139] Through Examples 1-3 and Comparative Examples 1-3, it can be seen that the conditioner provided by the present invention significantly improves the growth indicators of durian by optimizing the ratio of microbial agents and the carrier type (wheat bran / rice husk / corn cob): Example 1 has the best comprehensive effect, with the growth rates of plant height, stem diameter, and leaf number reaching 37.76%, 80%, and 93.75% in 6 months, respectively; Examples 1-3 are significantly better than commercially available conditioners and sterile agent controls, proving the repair effectiveness of the microbial agents in synergy with natural ingredients.

[0140] The growth rate of plant height, stem diameter and leaf number in the comparative example 1 in 6 months was 17%, 37.5% and 48.57%, which were significantly lower than those in the example 1. The reason for this is that the common conditioner lacked the composite microbial system of mycorrhizal fungi and EM bacteria.

[0141] In the second comparative example, plant height increased by only 14.85% over the past six months, stem diameter increased by 26.4%, and leaf number increased by 41.67%. The growth rates of these indicators decreased by more than 50% compared with those in Example 1, confirming that the inoculum is a key factor in promoting growth. This is due to the lack of the root symbiotic network of mycorrhizal fungi and the pathogen inhibition of EM bacteria, which results in a limited absorption range of the durian root system (relying solely on the root system itself) and the uninhibited reproduction of pathogens in the soil, indirectly affecting growth.

[0142] In comparative example 3, plant height increased by 16.16%, stem diameter increased by 29.66%, and leaf number increased by 44.12% in 6 months, reflecting that problems such as soil compaction and insufficient fertility under natural conditions significantly restrict durian growth, indicating that the conditioner of the present invention is necessary for soil remediation.

[0143] In summary, the present invention forms a system by combining mycorrhizal fungi (building a root symbiotic system) with EM bacterial agents (optimizing soil microecology), combined with physical improvement ingredients such as biochar and vermiculite, and nutrients such as shell powder and amino acid chelates, which is more efficient than single ingredients or commercially available products.

[0144] Natural chitosan adhesive (biodegradable) and all-organic raw materials (such as earthworm castings and coconut bran) ensure no toxic residues. Comparative verification shows that no heavy metal or chemical agent enrichment was detected in durian fruits treated with this conditioner, which meets the requirements of green agriculture.

Claims

1. A soil remediation conditioner for durian breeding, characterized in that, It is composed of the following raw materials in parts by weight: 35-45 parts fermented and decomposed organic fertilizer, 18-22 parts biochar, 22-28 parts humic acid, 8-12 parts vermiculite, 10-14 parts perlite, 12-18 parts shell powder, 6-10 parts mixed bacterial agent, 8-12 parts vermicompost, 4-6 parts amino acid chelate solution, 8-12 parts coconut coir, and 4-6 parts adhesive; The biochar is rice husk biochar screened with a 40-mesh sieve; the biochar is ash charcoal from the combustion of biomass, and the biomass is rice husk; The mixed inoculant comprises a mycorrhizal fungal inoculant, an EM inoculant, and an inoculant carrier, wherein the weight ratio of the mycorrhizal fungal inoculant, the EM inoculant, and the inoculant carrier is 1:1:10, and the inoculant carrier is selected from at least one of wheat bran, rice husk, or corn cob; The amino acid chelate solution is prepared by dissolving amino acid chelate solid powder in water to prepare a 0.1% w / v solution; The adhesive comprises chitosan and starch, the weight ratio of chitosan to starch is 1-3:1, and the concentration of the adhesive is 5%-10% w / v.

2. a kind of durian breeding soil remediation conditioner according to claim 1, is characterized in that, It is composed of the following raw materials in parts by weight: 40 parts of fermented and decomposed organic fertilizer, 20 parts of biochar, 25 parts of humic acid, 10 parts of vermiculite, 10 parts of perlite, 15 parts of shell powder, 10 parts of coconut bran, 8 parts of mixed bacterial agent, 10 parts of earthworm castings, 5 parts of amino acid chelate solution, and 5 parts of adhesive.

3. The method for preparing the soil remediation conditioner according to claim 1, characterized in that: The following steps are involved: (1) crushing fermented and decomposed organic fertilizer, biochar, humic acid, vermiculite, perlite, shell powder, and coconut husk into 60-100 mesh respectively, and sieving for later use; (2) mixing the mycorrhizal fungus agent, the EM agent, and the agent carrier in a ratio of 1:1:10 to prepare a mixed agent for standby use, wherein the agent carrier comprises at least one of wheat bran, rice husk, or corn cob; (3) Dry the earthworm castings, crush them and pass them through a 40-mesh sieve for later use; (4) dissolving the amino acid chelate solid powder in water to prepare a 0.1% w / v solution for later use; (5) mixing chitosan and starch in a weight ratio of 1-3:1, adding water, heating, stirring and dissolving to prepare an adhesive with a concentration of 5%-10% w / v; (6) mixing, by weight, 35-45 parts of the fermented and decomposed organic fertilizer obtained in step (1), 18-22 parts of biochar, 22-28 parts of humic acid, 8-12 parts of vermiculite, 10-14 parts of perlite, 12-18 parts of shell powder, 8-12 parts of coconut husk, 6-10 parts of the mixed bacterial agent prepared in step (2), 8-12 parts of the earthworm castings obtained in step (3), 4-6 parts of the amino acid chelate solution prepared in step (4), and 4-6 parts of the adhesive prepared in step (5) to obtain a mixture; (7) After the mixture is granulated, a soil remediation conditioner is obtained.

4. The preparation method according to claim 3, characterized in that In step (6), the mixing is performed by tossing until the mixture is uniformly mixed; Step (7) is specifically as follows: the granules obtained by granulating the mixture are dried at 25° C.-30° C. until the moisture content is less than 12%, thereby obtaining a soil remediation conditioner.

5. The preparation method according to claim 4, characterized in that The mixture is granulated to obtain particles with a diameter of 2-4 mm.

6. Use of the soil remediation conditioner according to any one of claims 1 to 2 in remediating soil for durian breeding.

7. The use according to claim 6, characterized in that The following steps are involved: (1) Apply the conditioner evenly over the planting area at a rate of 15 grams per square meter; (2) tilling the soil to fully mix the soil remediation agent with the soil; (3) Water thoroughly to ensure that the roots of the seedlings are in contact with the conditioner.

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