Aggregate soil planting method for purple sweet potatoes

Abstract

The invention provides a granular soil planting method for purple sweet potatoes. The granular soil planting method comprises the following steps that S01, grooves are formed; a plurality of grooves with a certain depth are formed in soil of the saline-alkali land through manual or mechanical equipment, the grooves are arranged at intervals in the linear direction or in a plum blossom shape at intervals, and the sections of the grooves are in a regular shape; step S02, forming an impermeable layer; preparing cohesive soil slurry, and uniformly smearing the cohesive soil slurry on the inner wall of the groove so as to form an impermeable layer with a certain thickness on the inner wall of the groove; s03, aggregate soil is laid; granular soil is evenly laid in the grooves, and the granular soil in the grooves forms planting soil; the granular soil planting method for the purple sweet potatoes can well adapt to planting of the purple sweet potatoes, construction is easy, the cost is low, the effect is good, secondary pollution to the soil is avoided, and reworking is convenient.

Description

Technical Field

[0001] This invention relates to the field of granular soil planting technology, and specifically to a method for planting purple sweet potatoes in granular soil. Background Technology

[0002] Soil, as a fundamental condition for plant growth, provides nutrients and water, and its properties directly determine its suitability for plant growth. Lands unsuitable for plant growth, such as saline-alkali land, polluted land, arid land, and deserts, require soil improvement to meet plant needs. Current soil improvement technologies for saline-alkali and polluted land typically employ chemical remediation (neutralization), flood irrigation (flushing), and lowering the groundwater level. There are also articles and case studies on using clay to establish reverse seepage barriers, such as the paper "Research on the Seepage Prevention Performance of Bentonite-Clay Sealing Material in Flexible Vertical Seepage Prevention Technology" published in the *Journal of Environmental Engineering Technology*, Vol. 12, No. 3, May 2022, which discloses a method for establishing vertical seepage barriers using bentonite and clay. While existing technologies can improve soil to some extent, they require significant investment, have low sustainability, and are prone to re-contamination, leading to high costs for remediation and hindering large-scale implementation.

[0003] Granular soil is typically composed of soil particles of varying sizes (sand, silt, clay), forming stable soil aggregates. This aggregate structure helps increase soil porosity. Granular soil has high porosity, usually possessing large macropores and micropores, giving it excellent water retention and aeration. Due to its aggregate structure, granular soil effectively retains moisture, making it suitable for plant growth. Its good aeration also allows for rapid drainage when there is excess water, preventing root hypoxia. For example, patent number CN202311299382.8 discloses an artificial soil with conjugated properties and its preparation method, namely, artificial aggregated soil. This is achieved by adding matrix fines and water to soil, modifying and granulating it in a drum to obtain conjugated artificial soil with a stable aggregate structure. Another example is patent number CN201510576711.8, which discloses an artificial soil aggregate and its preparation method. This artificial soil aggregate is obtained by granulating artificial soil particles, which include inorganic substances, organic substances, and a binder. The inorganic substances, organic substances, and binder are mixed evenly to obtain a mixture. This mixture is then added to a granulator, sprayed with water to granulate, and the water is evaporated to obtain the artificial soil aggregate. Artificial soil aggregates possess the structure of soil aggregates, can replace soil as a plant cultivation substrate, are less prone to substrate loss during irrigation, can coordinate the contradiction between substrate nutrient consumption and accumulation, can regulate the temperature of the cultivation substrate, and can improve the growth and elongation conditions of plant roots.

[0004] While existing technologies have characteristics suitable for plant growth, granular soil cannot be directly planted in areas such as saline-alkali land or polluted land, which limits its applicability. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of this, the present invention provides a method for planting purple sweet potatoes in granular soil, which is particularly suitable for planting purple sweet potatoes in areas such as saline-alkali land. The method is simple to implement, low in cost, effective, and does not cause secondary pollution to the soil, and is easy to repeat.

[0007] (II) Technical Solution

[0008] To solve the aforementioned technical problem, the present invention provides a method for planting purple sweet potatoes in granular soil, comprising the following steps:

[0009] Step S01, digging trenches; multiple trenches of a certain depth are dug in the soil of saline-alkali land by manual labor or mechanical equipment. The trenches are arranged at intervals along a straight line or in a quincunx pattern, and the cross-section of the trenches is a regular shape.

[0010] Step S02: Forming an impermeable layer; preparing a cohesive soil slurry and uniformly applying the cohesive soil slurry to the inner wall of the trench, thereby forming an impermeable layer of a certain thickness on the inner wall of the trench.

[0011] Step S03, Laying granular soil; The granular soil is evenly laid in the trench, and the granular soil in the trench forms planting soil.

[0012] In some embodiments, the cross-sectional shape of the trench is such that the upper dimension is larger and the lower dimension is smaller.

[0013] In some embodiments, the cross-sectional shape of the trench is an inverted trapezoid or a semi-circle.

[0014] In some embodiments, the depth of the trench is determined according to the plants to be planted; when the plants are vegetables, the depth of the trench is 20-50cm; when the plants are shrubs or trees, the depth of the trench is 50-150cm.

[0015] In some embodiments, the clay slurry is formed by mixing clay, additives, and water, wherein the additives are one or more of bentonite, gypsum, and plant fibers.

[0016] In some embodiments, the amount of bentonite added is less than 20%, and the amount of gypsum added is less than 10%.

[0017] In some embodiments, the thickness of the adhesive slurry coating is 2-10 mm.

[0018] In some embodiments, in step S01, ditching operations are performed using agricultural ditching machinery.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, the beneficial effects that at least one technical solution adopted in the embodiments of this specification can achieve include at least:

[0021] 1) Spraying a clay slurry into the trench creates a smooth, ceramic-like surface, effectively preventing seepage. Combined with the structural characteristics of granular soil (typically round or elliptical), the granular soil maintains point contact with the reverse osmosis layer within the trench. The low contact area between the granular structure and the reverse osmosis layer makes it difficult for the granular soil to directly and extensively infiltrate even if the reverse osmosis layer partially cracks or experiences minor seepage. Furthermore, the properties of granular soil are completely different from those of clay soil, creating a physical barrier that effectively separates saline-alkali or polluted soil from the planting soil. Granular soil possesses growth-friendly characteristics, ensuring both seepage prevention and planting effectiveness, making it suitable for large-scale planting in saline-alkali or polluted soils.

[0022] 2) This planting method is simple to construct, low in cost, and effective, and will not cause secondary pollution to the soil. When it is necessary to repeat the work after planting, it is only necessary to dig trenches, spray and cover with soil again, which is relatively easy to operate. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a simplified schematic diagram of the inverted trapezoidal structure of the trench in this invention;

[0025] Figure 2 This is a simplified schematic diagram of the semi-circular structure of the groove in this invention;

[0026] Figure 3 This is a simplified flowchart illustrating a method for planting purple sweet potatoes in granular soil according to the present invention.

[0027] The corresponding component names for each attached figure are: 1. Trench; 2. Impermeable layer; 3. Aggregate soil. Detailed Implementation

[0028] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0029] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0031] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0032] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0033] Combination Figures 1-3 As shown, the present invention provides a method for planting purple sweet potatoes in granular soil, comprising the following steps:

[0034] Step S01, trench 1 is dug; multiple trenches 1 with a certain depth are dug in the soil of saline-alkali land by manual labor or mechanical equipment. The multiple trenches 1 are arranged at intervals along a straight line or in a quincunx pattern. The cross-section of the trench 1 is a regular shape.

[0035] Step S02, forming the seepage barrier layer 2; prepare cohesive soil slurry on site, and apply the cohesive soil slurry evenly to the inner wall of the trench 1, thereby forming a seepage barrier layer 2 with a certain thickness on the inner wall of the trench 1.

[0036] Step S03, Laying granular soil 3; The granular soil 3 is evenly laid in the trench 1, and the granular soil 3 in the trench 1 forms the planting soil.

[0037] In some embodiments, such as Figure 1 and Figure 2 As shown, the cross-sectional shape of trench 1 is larger at the top and smaller at the bottom, such as an inverted trapezoid or semi-circle. The depth of trench 1 is determined by the type of plant to be grown; when planting vegetables, the depth of trench 1 is 20-50cm; when planting shrubs or trees, the depth of trench 1 is 50-150cm. This granular soil planting method is mainly suitable for planting purple sweet potatoes, i.e., the depth of trench 1 is 20-50cm. Purple sweet potato cultivation has core advantages such as high nutritional value, strong functionality, significant economic benefits, great income potential, eco-friendliness, and mature planting technology. This granular soil planting method, when used in conjunction with purple sweet potato cultivation, can achieve good planting results.

[0038] In some embodiments, the clay slurry is formed by mixing clay, additives, and water. The additives are one or more of bentonite, gypsum, and plant fibers, thereby improving impermeability and crack resistance. The amount of bentonite added should be less than 20%, and the amount of gypsum added should be less than 10%.

[0039] Bentonite can expand to 8-15 times its original volume after absorbing water, forming a gel-like substance. Mixing bentonite with clay can enhance its expansion properties. Furthermore, bentonite has high adsorption capacity, capable of adsorbing moisture, oils, toxins, and heavy metals. However, a higher proportion of bentonite in clay is not necessarily better; typically, the addition ratio is below 20%. For example, the article "Research on the Seepage Prevention Performance of Bentonite-Clay Sealing Material in Flexible Vertical Seepage Prevention Technology" in Volume 12, Issue 3, May 2022 of the *Journal of Environmental Engineering Technology* points out that a 0%-5% addition ratio provides good seepage prevention improvement, but the improvement slows down when the addition exceeds 12%.

[0040] Adding gypsum powder to clay soils allows gypsum to reduce swelling and shrinkage, increase strength, and improve impermeability. Gypsum also possesses excellent properties such as replacing sodium with calcium ions and reducing alkalinity, making it particularly effective in improving saline-alkali soils. Gypsum is typically added at a concentration below 10%, with good impermeability at concentrations between 0% and 5%. Conversely, concentrations above 5% exhibit high strengthening properties.

[0041] Adding a small amount of plant fiber to clay soil can increase its crack resistance.

[0042] In some embodiments, the thickness of the clay slurry coating is 2-10 mm.

[0043] In some embodiments, in step S01, agricultural trenching machinery is used to perform trenching operations in order to improve trenching efficiency.

[0044] In step S03, granular soil refers to soil with a granular structure, typically formed into small spherical soil particles through artificial granulation. It possesses a certain degree of compressive strength. Granular soil can be the soil described in "An Artificial Soil with Conjugate Properties and Its Preparation Method" published in patent number CN202311299382.8, or it can be formed by adding plant fibers to the planting soil and granulating clay soil according to planting requirements. The properties and structure of granular soil have been described in detail in the background section and will not be repeated here.

[0045] In step S03, the granulated soil can be poured in after the cohesive soil slurry in the trench has dried, or it can be poured in directly after the cohesive soil slurry has been sprayed. Although the undried cohesive soil slurry will adhere to some of the granulated soil, the granulated soil is composed of multiple independent small clumps, so it does not affect the seepage prevention effect or the structure of the granulated soil.

[0046] Spraying a clay slurry into the trench creates a smooth, ceramic-like surface, effectively preventing seepage. Combined with the structural characteristics of granular soil (typically round or elliptical), the granular soil maintains point contact with the reverse osmosis layer within the trench. The low contact area between the granular structure and the reverse osmosis layer prevents direct and extensive infiltration of the granular soil even if the reverse osmosis layer partially cracks or experiences minor seepage. Furthermore, the properties of granular soil are completely different from those of clay soil, creating a physical barrier that effectively separates saline-alkali or contaminated soil from the planting soil. Granular soil possesses growth-friendly characteristics, ensuring both seepage prevention and planting success, making it suitable for large-scale planting in saline-alkali or contaminated soils.

[0047] This planting method is simple to implement, low in cost, and effective, and it will not cause secondary pollution to the soil. When it is necessary to repeat the work after planting, it is only necessary to dig trenches, spray and cover with soil again, which is easy to operate.

[0048] In this specification, the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the descriptions of the embodiments described later are relatively simple, and relevant parts can be referred to the descriptions of the foregoing embodiments.

[0049] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for planting purple sweet potatoes in granular soil, characterized in that, Includes the following steps: Step S01, digging trenches (1); multiple trenches (1) with a certain depth are dug in the soil of saline-alkali land by manual or mechanical equipment. The multiple trenches (1) are arranged at intervals along a straight line or in a quincunx pattern. The cross-section of the trenches (1) is a regular shape. Step S02, forming an impermeable layer (2); preparing a cohesive soil slurry and uniformly applying the cohesive soil slurry to the inner wall of the trench (1), thereby forming an impermeable layer (2) of a certain thickness on the inner wall of the trench (1); Step S03, lay granular soil (3); spread the granular soil (3) evenly in the trench (1), and the granular soil (3) in the trench (1) forms planting soil.

2. The method for planting purple sweet potatoes in granular soil according to claim 1, characterized in that: The cross-sectional shape of the groove (1) is that the upper dimension is large and the lower dimension is small.

3. The method for planting purple sweet potatoes in granular soil according to claim 1, characterized in that: The cross-sectional shape of the groove (1) is an inverted trapezoid or a semi-circle.

4. The method for planting purple sweet potatoes in granular soil according to claim 1, characterized in that: The depth of the trench (1) is determined according to the plants to be planted; when the plants are vegetables, the depth of the trench (1) is 20-50cm; when the plants are shrubs or trees, the depth of the trench (1) is 50-150cm.

5. The method for planting purple sweet potatoes in granular soil according to claim 1, characterized in that: The clay slurry is formed by mixing clay, additives and water, wherein the additives are one or more of bentonite, gypsum and plant fiber.

6. The method for planting purple sweet potatoes in granular soil according to claim 5, characterized in that: The amount of bentonite added is less than 20%, and the amount of gypsum added is less than 10%.

7. The method for planting purple sweet potatoes in granular soil according to claim 1, characterized in that: The thickness of the clay slurry coating is 2-10 mm.

8. The method for planting purple sweet potatoes in granular soil according to claim 1, characterized in that: In step S01, agricultural trenching machinery is used to perform trenching operations.

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