A nutrient solution for transplanting from pristine topsoil, its preparation method, and its application.

Abstract

This application relates to the field of mountain restoration technology, specifically disclosing a nutrient solution for transplanting native topsoil, its preparation method, and its application. The nutrient solution is mainly composed of the following raw materials in parts by weight: 3000 parts water, 40-60 parts calcium nitrate tetrahydrate, 25-35 parts potassium dihydrogen phosphate, 10-20 parts potassium nitrate, 15-25 parts magnesium sulfate heptahydrate, 25-35 parts peptone, 45-55 parts molasses, 90-110 parts glucose, 20-30 parts beef extract, 8-12 parts small molecule peptide powder, 4-6 parts 6-aminopurine, 4-6 parts 3-pyridine hydroxy acid, 3-7 parts plant growth regulator, and 3-7 parts compound trace elements. This nutrient solution, while maintaining the balance of soil microbial communities, provides nutrients to microorganisms, increases their number and enzyme activity, reduces the impact of altered microbial communities on plants, increases seedling survival rate, promotes seedling growth, and facilitates mountain ecological restoration.

Description

Technical Field

[0001] This application relates to the field of mountain restoration technology, and more specifically, it relates to a nutrient solution for transplanting native topsoil, its preparation method, and its application. Background Technology

[0002] With the development of Chinese society and the improvement of living standards, people are paying increasing attention to ecological restoration. Ecological restoration refers to ceasing human interference with ecosystems to reduce their burden. For the restoration of abandoned mountains, it is often necessary to transplant soil and seedlings from other parts of the mountain to complement the ecosystem's self-repair capabilities, allowing the damaged ecosystem to quickly recover its original state. When transplanting soil and seedlings, the soil and seedlings must first be excavated, then transported, and finally planted at the appropriate location on the mountain. However, during the excavation of soil and seedlings, because the soil has already been separated from its original environment and has undergone long-term transportation, it is easy for microorganisms in the soil to die, reducing their numbers and affecting the survival rate of transplanted seedlings. Summary of the Invention

[0003] In order to increase the number of soil microorganisms and improve the survival rate of seedlings after soil transplantation, this application provides a nutrient solution for transplanting in pristine topsoil, its preparation method, and its application.

[0004] Firstly, this application provides a nutrient solution for transplanting in pristine topsoil, employing the following technical solution:

[0005] A nutrient solution for transplanting in pristine topsoil is mainly composed of the following raw materials in parts by weight: 3000 parts water, 40-60 parts calcium nitrate tetrahydrate, 25-35 parts potassium dihydrogen phosphate, 10-20 parts potassium nitrate, 15-25 parts magnesium sulfate heptahydrate, 25-35 parts peptone, 45-55 parts molasses, 90-110 parts glucose, 20-30 parts beef extract, 8-12 parts small molecule peptide powder, 4-6 parts 6-aminopurine, 4-6 parts 3-pyridine hydroxy acid, 3-7 parts plant growth regulator, and 3-7 parts compound trace elements.

[0006] The nutrient solution described in this application, when applied to transplant soil and seedlings, can rapidly restore the number of microorganisms and enzyme activity, with a bacterial count >63×10⁻⁶. 5 cfu / g dry soil, actinomycete count >36×10 5It exhibits high levels of cfu / g dry soil, urease activity >44mg / 10g dry soil·24h, phosphatase activity >1mg / 10g dry soil·24h, and sucrase activity >70mg / 10g dry soil·24h. Furthermore, it increases seedling survival rate and new shoot growth, achieving a seedling survival rate ≥94% and new shoot growth >150cm / plant. This allows plants to quickly adapt to their environment, promotes plant growth, and possesses economic value and promising market application prospects.

[0007] The nutrient solution of this application, through the synergistic effect of its raw materials, not only provides nutrients to plants but also adds plant growth regulators to accelerate the healing of root wounds and promote root growth. The peptone, molasses, glucose, and beef extract in the nutrient solution provide carbon, nitrogen, and energy sources for soil microorganisms, promoting their growth and reproduction, maintaining the balance of the soil microbial community, and thus maintaining a balanced growth environment for the seedlings. Simultaneously, small molecule peptide powder, 6-aminopurine, and 3-pyridine hydroxy acid are added to the nutrient solution's raw materials. All of these can be rapidly absorbed by microorganisms. The small molecule peptide powder, mainly composed of small peptides, promotes enzyme activity; 6-aminopurine participates in DNA and RNA synthesis, promoting rapid cell growth; and 3-pyridine hydroxy acid is an important component of coenzyme I and coenzyme II, participating in microbial oxidation and promoting microbial metabolism. Through the synergistic effect of small molecule peptide powder, 6-aminopurine, and 3-pyridine hydroxy acid, the nutrient solution of this application significantly enhances the reproduction of beneficial microorganisms, increases their quantity and enzyme activity, and improves the survival rate of transplanted seedlings. Meanwhile, the nutrient solution of this application does not contain any exogenous microorganisms. While maintaining the balance of soil microbial community, it provides nutrients for microorganisms, greatly increases microbial activity, reduces the impact of changes in microbial community on plants, increases the survival rate of transplanted seedlings, promotes the vigorous growth of seedlings, and facilitates the ecological restoration of the mountain.

[0008] Optionally, the small molecule peptide powder is one or both of plant peptide powder and animal peptide powder.

[0009] Optionally, the plant peptide powder is one or more of soybean peptide powder, walnut peptide powder, and wheat peptide powder;

[0010] The animal peptide powder is one or more of fish collagen peptide powder, bovine bone collagen peptide powder, and sea cucumber peptide powder.

[0011] By adopting the above technical solution, the small molecule peptide powder is limited, and further limited to plant peptide powder and animal peptide powder, which facilitates the selection of small molecule peptide powder, and the raw materials are abundant and readily available.

[0012] Optionally, the small molecule peptide powder is either plant peptide powder or animal peptide powder, and the weight ratio of plant peptide powder to animal peptide powder is (5-7):(1-3).

[0013] Optionally, the small molecule peptide powder is either soybean peptide powder or fish collagen peptide powder, and the weight ratio of soybean peptide powder to fish collagen peptide powder is (5-7):(1-3).

[0014] By adopting the above technical solutions, the small molecule peptide powder is optimized, and the synergistic effect between soybean peptide powder and fish collagen peptide powder is utilized to further increase the number of soil microorganisms and enzyme activity, so that the nutrient solution exhibits better performance.

[0015] Preferably, the weight ratio of soybean peptide powder to fish collagen peptide powder is 3:1.

[0016] In one implementation, the weight ratio of soybean peptide powder to fish collagen peptide powder is 3:1, but the weight ratio can also be set to 5:1, 5:3, 7:1, 7:3, etc., as needed.

[0017] Optionally, the plant growth regulator is one or both of auxin and cytokinin.

[0018] Optionally, the cytokinin is one or more of 2,4-dichlorophenoxyacetic acid, naphthaleneacetic acid, and indolebutyric acid; the cytokinin is one or more of diphenylurea, p-iodophenoxyacetic acid, and 6-glycosylaminopurine.

[0019] By adopting the above technical solution, plant growth regulators are limited, and auxins and cytokinins are further limited, which facilitates the selection of plant growth regulators. Moreover, the raw materials are abundant and readily available.

[0020] Optionally, the plant growth regulator is either auxin or cytokinin, and the weight ratio of auxin to cytokinin is (7-9):(1-3).

[0021] Optionally, the plant growth regulator is either 2,4-dichlorophenoxyacetic acid or diphenylurea, and the weight ratio of 2,4-dichlorophenoxyacetic acid to diphenylurea is (7-9):(1-3).

[0022] By adopting the above technical solutions, plant growth regulators are optimized, and the synergistic effect between 2,4-dichlorophenoxyacetic acid and diphenylurea is utilized to further improve the survival rate of seedlings and the growth of new shoots.

[0023] Preferably, the weight ratio of 2,4-dichlorophenoxyacetic acid to diphenylurea is 4:1.

[0024] In one embodiment, the weight ratio of 2,4-dichlorophenoxyacetic acid to diphenylurea is 4:1, but the weight ratio can also be set to 7:1, 7:3, 9:1, 9:3, etc., as needed.

[0025] Optionally, the composite trace elements are mainly made from the following raw materials in parts by weight: 3-5 parts of iron diethylenetriaminepentaacetate, 0.2-0.4 parts of manganese sulfate, 0.1-0.3 parts of copper sulfate pentahydrate, and 0.4-0.6 parts of boric acid.

[0026] By adopting the above technical solution, the raw materials and proportions of the composite trace elements are limited. Iron, manganese, copper and boron trace elements are added to the nutrient solution to promote the growth of microorganisms and plants, which facilitates the rapid restoration of the mountain.

[0027] Furthermore, the composite trace elements are prepared by the following method: iron diethylenetriaminepentaacetate, manganese sulfate, copper sulfate pentahydrate, and boric acid are mixed to obtain the composite trace elements.

[0028] In several implementation schemes, the composite trace element is mainly composed of the following raw materials in parts by weight: 4 parts ferric diethylenetriaminepentaacetate, 0.3 parts manganese sulfate, 0.2 parts copper sulfate pentahydrate, and 0.5 parts boric acid. Alternatively, the raw materials can be configured as follows: 3 parts ferric diethylenetriaminepentaacetate, 0.4 parts manganese sulfate, 0.3 parts copper sulfate pentahydrate, and 0.6 parts boric acid. Another option is to configure it as follows: 5 parts ferric diethylenetriaminepentaacetate, 0.2 parts manganese sulfate, 0.1 parts copper sulfate pentahydrate, and 0.4 parts boric acid. Finally, a third option is to configure it as follows: 4 parts ferric diethylenetriaminepentaacetate, 0.2 parts manganese sulfate, 0.3 parts copper sulfate pentahydrate, and 0.5 parts boric acid.

[0029] Secondly, this application provides a method for preparing the nutrient solution for transplanting in pristine topsoil as described above, using the following technical solution:

[0030] A method for preparing the nutrient solution for transplanting in pristine topsoil as described above includes the following steps:

[0031] S1. Mix some water, calcium nitrate tetrahydrate, potassium dihydrogen phosphate, potassium nitrate, magnesium sulfate heptahydrate, and complex trace elements to obtain premixed solution A;

[0032] S2. Mix the remaining water, peptone, molasses, glucose, and beef extract, then add small molecule peptide powder, 6-aminopurine, 3-pyridine hydroxy acid, and plant growth regulator to obtain premix solution B.

[0033] S3. Mix premixed solution A and premixed solution B to obtain nutrient solution;

[0034] The weight ratio of some water to the remaining water is (1-3):(1-3).

[0035] By adopting the above technical solution, premixed solution A and premixed solution B are prepared in advance, and then premixed solution A and premixed solution B are mixed to make the raw materials uniform and facilitate the preparation of nutrient solution.

[0036] In several implementation schemes, the weight ratio of partial water to remaining water is 1:3, but the weight ratio can also be set to 1:1, 1:2, 1:3, 2:1, 2:3, 3:1, 3:2, etc., as needed.

[0037] Thirdly, this application provides an application of the nutrient solution described above for transplanting in pristine topsoil, employing the following technical solution:

[0038] An application of the nutrient solution described above for transplanting native topsoil, wherein the nutrient solution is used for soil maintenance after transplantation.

[0039] Furthermore, the amount of nutrient solution used is 80-120g / m³. 2 The maintenance period is 20-40 days. Preferably, the nutrient solution dosage is 90-110g / m³. 2 The curing period is 25-35 days. More preferably, the nutrient solution dosage is 100 mg / m³. 2 The maintenance period is 30 days.

[0040] In summary, this application has at least the following beneficial effects:

[0041] The nutrient solution of this application, with the addition of peptone, molasses, glucose, and beef extract, provides carbon, nitrogen, and energy sources for soil microorganisms; the addition of small molecule peptide powder promotes enzyme activity; the addition of 6-aminopurine, which participates in DNA and RNA synthesis and promotes rapid cell growth; the addition of 3-pyridine hydroxy acid, an important component of coenzyme I and coenzyme II, which participates in microbial oxidation and promotes microbial metabolism, and the synergistic effect between small molecule peptide powder, 6-aminopurine, and 3-pyridine hydroxy acid greatly increases the number of microorganisms and enzyme activity; and the addition of plant growth regulators accelerates the healing of seedling root wounds and promotes seedling root growth. This nutrient solution, without the addition of exogenous microorganisms, provides nutrients to microorganisms while maintaining the balance of the soil microbial community, greatly increasing microbial activity, reducing the impact of microbial community changes on plants, increasing seedling transplant survival rate, promoting seedling growth, and facilitating the ecological restoration of the mountain. Detailed Implementation

[0042] To make this application easier to understand, the following detailed description will be provided with reference to embodiments. These embodiments are for illustrative purposes only and are not intended to limit the scope of application of this application. Unless otherwise specified, the raw materials or components used in this application can be obtained commercially or by conventional methods.

[0043] Preparation Example

[0044] A composite trace element comprises the following raw materials: 4 kg of ferric diethylenetriaminepentaacetate, 0.3 kg of manganese sulfate, 0.2 kg of copper sulfate pentahydrate, and 0.5 kg of boric acid. Manganese sulfate, copper sulfate pentahydrate, and boric acid are added to ferric diethylenetriaminepentaacetate, and the mixture is stirred for 5 minutes to obtain the composite trace element.

[0045] Example

[0046] Table 1. Raw materials and proportions of nutrient solution (unit: g)

[0047]

[0048]

[0049] Example 1

[0050] A nutrient solution for transplanting native topsoil is shown in Table 1, with its raw materials and proportions as described.

[0051] Among them, the peptone is soybean peptone, and is selected from Shandong Weiduofeng Biotechnology Co., Ltd.; the molasses is selected from Shandong Xinxu Chemical Co., Ltd.; the beef extract is selected from Shandong Weiduofeng Biotechnology Co., Ltd.; the small molecule peptide powder is soybean peptide powder, and is selected from Dezhou Lanli Biotechnology Co., Ltd.; the plant growth regulator is auxin, and the auxin is 2,4-dichlorophenoxyacetic acid; the complex trace elements are prepared using the method of the preparation example.

[0052] A method for preparing a nutrient solution for transplanting in pristine topsoil includes the following steps:

[0053] S1. Add calcium nitrate tetrahydrate, potassium dihydrogen phosphate, potassium nitrate, magnesium sulfate heptahydrate, and complex trace elements to a portion of water, stir for 10 minutes, and obtain a premixed solution.

[0054] Of this, 25 wt% of the total water usage is accounted for.

[0055] S2. Add peptone, molasses, glucose, and beef extract to the remaining water and stir for 10 minutes. Then add small molecule peptide powder, 6-aminopurine, 3-pyridine hydroxy acid, and plant growth regulator, and stir for 10 minutes to obtain premixed solution B.

[0056] S3. Add premixed solution A to premixed solution B and stir for 10 minutes to obtain nutrient solution.

[0057] Example 2

[0058] A nutrient solution for transplanting native topsoil differs from Example 1 in that the raw material ratio of the nutrient solution is different, as shown in Table 1.

[0059] Example 3

[0060] A nutrient solution for transplanting native topsoil differs from Example 1 in that the raw material ratio of the nutrient solution is different, as shown in Table 1.

[0061] Example 4

[0062] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that the source of the small molecule peptide powder in the nutrient solution is different; the small molecule peptide powder is fish collagen peptide powder, selected from Dezhou Lanli Biotechnology Co., Ltd.

[0063] Example 5

[0064] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that the source of the small molecule peptide powder in the nutrient solution is different. The small molecule peptide powder is made of two kinds: soybean peptide powder and fish collagen peptide powder, and the weight ratio of soybean peptide powder to fish collagen peptide powder is 3:1. Both soybean peptide powder and fish collagen peptide powder are selected from Dezhou Lanli Biotechnology Co., Ltd.

[0065] Example 6

[0066] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that the plant growth regulator in the nutrient solution has a different source; the plant growth regulator is cytokinin, and the cytokinin is diphenylurea.

[0067] Example 7

[0068] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that the plant growth regulators in the nutrient solution are from different sources. The plant growth regulators are auxin and cytokinin, and the weight ratio of auxin to cytokinin is 4:1. The auxin is 2,4-dichlorophenoxyacetic acid, and the cytokinin is diphenylurea.

[0069] Comparative Example

[0070] Comparative Example 1

[0071] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that the nutrient solution does not contain peptone, molasses, glucose, beef extract, small molecule peptide powder, 6-aminopurine, 3-pyridine hydroxy acid, or plant growth regulators.

[0072] Comparative Example 2

[0073] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that the nutrient solution does not contain small molecule peptide powder, 6-aminopurine, or 3-pyridine hydroxy acid.

[0074] Comparative Example 3

[0075] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that an equal amount of small molecule peptide powder replaces 6-aminopurine and 3-pyridine hydroxy acid in the raw materials of the nutrient solution.

[0076] Comparative Example 4

[0077] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that an equal amount of 6-aminopurine replaces small molecule peptide powder and 3-pyridine hydroxy acid in the raw materials of the nutrient solution.

[0078] Comparative Example 5

[0079] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that an equal amount of 3-pyridine hydroxy acid replaces small molecule peptide powder and 6-aminopurine in the raw materials of the nutrient solution.

[0080] Comparative Example 6

[0081] A nutrient solution for transplanting in pristine topsoil differs from Example 1 in that no plant growth regulators are added to the raw materials of the nutrient solution.

[0082] Application examples

[0083] Application Example 1

[0084] An application of a nutrient solution for transplanting native topsoil includes the following steps: After soil transplantation, the nutrient solution is poured into the soil, and a 30-day maintenance treatment is performed. The dosage of the nutrient solution is 100g / m³. 2 The nutrient solution was prepared using the method described in Example 1.

[0085] Application Example 2-7

[0086] An application of a nutrient solution for transplanting native topsoil differs from Application Example 1 in that the source of the nutrient solution is different, and the nutrient solutions of Application Examples 2-7 are prepared sequentially using the methods of Examples 2-7.

[0087] Application of comparative examples

[0088] Application Comparative Examples 1-6

[0089] An application of a nutrient solution for transplanting native topsoil differs from Application Example 1 in that the source of the nutrient solution is different, and the nutrient solutions of Comparative Examples 1-6 are prepared sequentially using the methods of Comparative Examples 1-6.

[0090] Performance testing

[0091] (1) Nutrient solutions obtained in Examples 1-7 and Comparative Examples 1-6 were used to maintain the transplanted soil for 1 day. The number of bacteria and actinomycetes in the soil after maintenance was detected by plate dilution counting method. The urease activity, phosphatase activity and sucrase activity in the soil after maintenance were detected by "Soil Microbiology Analysis Method". The test results are shown in Table 2.

[0092] The number of bacteria in the soil before curing was 30.2 × 10⁻⁶. 5 The cfu / g dry soil concentration and the number of actinomycetes were 16.5 × 10⁻⁶. 5 The cfu / g dry soil concentration, urease activity was 21.43 mg / 10g dry soil·24h, phosphatase activity was 0.33 mg / 10g dry soil·24h, and sucrase activity was 22.54 mg / 10g dry soil·24h.

[0093] (2) Using the nutrient solutions obtained in Examples 1-7 and Comparative Examples 1-6, 50 transplanted seedlings were maintained. The transplanted seedlings were paper mulberry seedlings. The maintenance period was 6 months, with nutrient solution being added once a month at a dosage of 100g / m² each time. 2 Then, the survival rate of the seedlings and the growth of new shoots were tested, and the test results are shown in Table 2.

[0094] Table 2 Detection Results

[0095]

[0096] As shown in Table 2, the nutrient solution of this application, when applied to transplanted soil and seedlings, exhibits high bacterial and actinomycete counts, as well as high urease, phosphatase, and sucrase activities, with a bacterial count of 63.6 × 10⁻⁶. 5 -68.3×10 5 The cfu / g dry soil concentration and actinomycete count were 36.1 × 10⁻⁶. 5 -40.2×10 5The soil exhibits high levels of microbial quantity, activity, and fertility, with cfu / g dry soil, urease activity of 44.25-47.93 mg / 10g dry soil·24h, phosphatase activity of 1.06-1.21 mg / 10g dry soil·24h, and sucrase activity of 70.31-77.68 mg / 10g dry soil·24h. Furthermore, it demonstrates high seedling survival rate and rapid shoot growth, with a survival rate of 94-98% and shoot growth of 150.3-163.2 cm / plant. This facilitates rapid plant adaptation to the environment, promotes plant growth, and possesses economic value and promising market application prospects.

[0097] Example 1 and Comparative Example 1 were compared. The nutrient solution of Comparative Example 1 contained water, calcium nitrate tetrahydrate, potassium dihydrogen phosphate, potassium nitrate, magnesium sulfate heptahydrate, and complex trace elements. Compared to Comparative Example 1, Example 1 added peptone, molasses, glucose, beef extract, small molecule peptide powder, 6-aminopurine, 3-pyridine hydroxy acid, and plant growth regulators to the nutrient solution. This demonstrates that adding peptone, molasses, glucose, beef extract, small molecule peptide powder, 6-aminopurine, 3-pyridine hydroxy acid, and plant growth regulators to the nutrient solution can increase the number of microorganisms and enzyme activity, thereby increasing seedling survival rate and the amount of new shoot growth.

[0098] Example 1 was compared with Comparative Examples 2-5. The nutrient solution of Comparative Example 2 contained water, calcium nitrate tetrahydrate, potassium dihydrogen phosphate, potassium nitrate, magnesium sulfate heptahydrate, peptone, molasses, glucose, beef extract, plant growth regulators, and complex trace elements. Compared to Comparative Example 2, Comparative Example 3 added small molecule peptide powder to its nutrient solution. Compared to Comparative Example 2, Comparative Example 4 added 6-aminopurine to its nutrient solution. Compared to Comparative Example 2, Comparative Example 5 added 3-pyridine hydroxy acid to its nutrient solution. Compared to Comparative Example 2, Example 1 added small molecule peptide powder, 6-aminopurine, and 3-pyridine hydroxy acid to its nutrient solution. This demonstrates that simultaneously adding small molecule peptide powder, 6-aminopurine, and 3-pyridine hydroxy acid to the nutrient solution, and utilizing their synergistic effect, significantly increases the number of soil microorganisms and enzyme activity, rapidly restores soil microbial balance, improves seedling survival rate, and promotes rapid seedling growth and reproduction.

[0099] Comparing Example 1 and Comparative Example 6, no plant growth regulators were added to the nutrient solution of Comparative Example 6; however, Example 1, compared to Comparative Example 6, included plant growth regulators in its nutrient solution ingredients. This demonstrates that adding plant growth regulators to the nutrient solution ingredients has little impact on microbial numbers and enzyme activity, but it significantly increases seedling survival rate and new shoot growth. Furthermore, comparing Examples 6 and 7, Example 1, compared to Comparative Example 6, included auxin in its nutrient solution ingredients; Example 6, compared to Comparative Example 6, included cytokinin; and Example 7, compared to Comparative Example 6, included both auxin and cytokinin in its nutrient solution ingredients. This shows that simultaneously adding auxin and cytokinin to the nutrient solution ingredients, and utilizing their synergistic effect, can result in a superior nutrient solution performance.

[0100] It should be noted that the embodiments described above are only for explaining this application and do not constitute any limitation on this application. This application has been described with reference to typical embodiments, but it should be understood that the terms used therein are descriptive and explanatory terms, not limiting terms. Modifications can be made to this application within the scope of the claims, and revisions can be made to the invention without departing from the scope and spirit of this application. Although the application described herein relates to specific methods, materials, and embodiments, it does not mean that this application is limited to the specific examples disclosed herein; on the contrary, this application can be extended to all other methods and applications with the same function.

Claims

1. A nutrient solution for transplanting in pristine topsoil, characterized in that: It is made from the following raw materials in parts by weight: 3000 parts water, 40-60 parts calcium nitrate tetrahydrate, 25-35 parts potassium dihydrogen phosphate, 10-20 parts potassium nitrate, 15-25 parts magnesium sulfate heptahydrate, 25-35 parts peptone, 45-55 parts molasses, 90-110 parts glucose, 20-30 parts beef extract, 8-12 parts small molecule peptide powder, 4-6 parts 6-aminopurine, 4-6 parts 3-pyridine hydroxy acid, 3-7 parts plant growth regulator, and 3-7 parts compound trace elements; the small molecule peptide powder is of two types: soybean peptide powder and fish collagen peptide powder, and the weight ratio of soybean peptide powder to fish collagen peptide powder is (5-7):(1-3).

2. The nutrient solution for transplanting in pristine topsoil according to claim 1, characterized in that: The plant growth regulator is one or both of auxins and cytokinins.

3. The nutrient solution for transplanting in pristine topsoil according to claim 2, characterized in that: The cytokinin is one or more of 2,4-dichlorophenoxyacetic acid, naphthaleneacetic acid, and indolebutyric acid. The cytokinin is one or more of diphenylurea, p-iodophenoxyacetic acid, and 6-glycosylaminopurine.

4. The nutrient solution for transplanting in pristine topsoil according to claim 3, characterized in that: The plant growth regulators are 2,4-dichlorophenoxyacetic acid and diphenylurea, and the weight ratio of 2,4-dichlorophenoxyacetic acid and diphenylurea is (7-9):(1-3).

5. The nutrient solution for transplanting in pristine topsoil according to claim 1, characterized in that: The composite trace elements are mainly made from the following raw materials in parts by weight: 3-5 parts of ferric diethylenetriaminepentaacetate, 0.2-0.4 parts of manganese sulfate, 0.1-0.3 parts of copper sulfate pentahydrate, and 0.4-0.6 parts of boric acid.

6. A method for preparing a nutrient solution for transplanting native topsoil as described in any one of claims 1-5, characterized in that: Includes the following steps: S1. Mix some water, calcium nitrate tetrahydrate, potassium dihydrogen phosphate, potassium nitrate, magnesium sulfate heptahydrate, and complex trace elements to obtain premixed solution A; S2. Mix the remaining water, peptone, molasses, glucose, and beef extract, then add small molecule peptide powder, 6-aminopurine, 3-pyridine hydroxy acid, and plant growth regulator to obtain premix solution B. S3. Mix premixed solution A and premixed solution B to obtain nutrient solution; The weight ratio of some water to the remaining water is (1-3):(1-3).

7. The application of a nutrient solution for transplanting native topsoil as described in any one of claims 1-5, characterized in that: After soil transplantation, nutrient solution is used for soil maintenance.

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