Sandy soil root system domestication layered structure improvement method

Abstract

The invention provides a sandy soil root domestication layered structure improvement method which comprises the steps that a surface guide layer, a channel induction layer and a deep resource layer are sequentially arranged on the earth surface from top to bottom, in-situ sandy soil is buried in the surface guide layer, a loose channel is constructed in the channel induction layer, and the loose channel is communicated with the deep resource layer; the deep resource layer comprises a water locking substance, a water retention substance, an adsorption substance and a supporting substance; when it is detected that the EC value of the joint of the surface guide layer and the channel induction layer is larger than the preset multiple of the EC value of the joint of the channel induction layer and the deep resource layer, a drip irrigation system is started to conduct drip irrigation on the surface guide layer according to the preset water pressure and water flow so as to guide nutrients in the surface guide layer to be collected towards the deep resource layer; according to the method, replacement of soil dressing is not needed, deep pricking and field planting of plant roots are guided through water and fertilizer stress and nutrition induction mechanisms, the drought resistance and stress resistance of plants are improved, the quality of crop products is optimized, a stable water and fertilizer environment is created for growth of plants in sandy soil, and the economical efficiency and effectiveness of the improvement technology are improved.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural soil improvement, in particular to a method for improving the root system acclimation and layered structure of sandy soil. Background Art

[0002] Soil improvement technology refers to a complete set of technical systems that use physical, chemical, biological or integrated methods to regulate or improve the physical and chemical properties, biological activity and structure of the soil, making it more suitable for plant growth, farming management and the performance of ecological functions. Among them, water and fertilizer stress technology and nutrient induction technology both optimize plant growth by optimizing the distribution of water and nutrients in the soil and intervening in plant physiological mechanisms.

[0003] Existing technologies for improving sandy soils have problems such as high replacement costs for imported soil (i.e., non-native soil that is manually transported or replaced), water retention time of less than 3 days for single-material improvement, and leaching rate of over 60% for conventional deep fertilization. As a result, in the process of improving sandy soils, there is pressure from excessive economic costs, and it is impossible to achieve long-term retention of soil moisture and efficient use of fertilizers, making it difficult to meet the needs of plant growth for a stable water and fertilizer environment. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a method for improving the layered structure of sandy soil root acclimation, which can effectively solve the above problems.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: The present invention provides a method for improving the layered structure of sandy soil root acclimation, comprising: arranging a surface guide layer, a channel induction layer, and a deep resource layer in order from top to bottom on the surface, wherein the surface guide layer is filled with in-situ sand, the channel induction layer is constructed with loose channels, and the deep resource layer includes a water-locking substance, a water-retaining substance, an adsorbent substance, and a supporting substance; When it is detected that the EC value at the intersection of the surface guide layer and the channel induction layer is greater than a preset multiple of the EC value at the intersection of the channel induction layer and the deep resource layer, a nutrient induction operation is performed, wherein the nutrient induction operation is to start the drip irrigation system to drip irrigate the surface guide layer according to the preset water pressure and water flow, so as to guide the nutrients in the surface guide layer to converge into the deep resource layer; Furthermore, when it is detected that the soil tension of the surface guide layer is less than a preset value, a water and fertilizer stress operation is performed, wherein the water and fertilizer stress operation is to shut down the drip irrigation system and continue for several days to guide the plant roots to search for nutrients deep down.

[0006] As a further improvement, the method further includes: when it is detected that the water tension value of the deep resource layer is lower than a preset threshold, shutting down the drip irrigation system and continuing for several days.

[0007] As a further improvement, the surface guide layer is used to maintain a barren environment of sandy soil.

[0008] As a further improvement, the channel inducing layer is configured with loose channels for plant root growth.

[0009] As a further improvement, the deep resource layer is configured with an area for retaining moisture and fixing nutrients.

[0010] As a further improvement, the combination of various substances in the deep resource layer is calculated by volume percentage: water-locking substances account for 35% to 45%, water-retaining substances account for 12% to 18%, adsorption substances account for 4% to 6%, and supporting substances account for 35% to 45%.

[0011] As a further improvement, the water-locking substance is a fine particle material with a particle diameter of ≤0.05mm; the water-retaining substance is an organic fiber with a water absorption rate of ≥300%; the adsorbent is a material with a specific surface area of ​​≥400m 2 / g porous material; the supporting material is coarse aggregate with a particle size of 0.5mm to 2mm.

[0012] As a further improvement, the water-locking substance is one or more of pond mud, clay, bentonite, and diatomaceous earth; the water-retaining material is one or more of decomposed straw, coconut husk, peat, and sawdust; the adsorption material is one or more of biochar, activated carbon, zeolite, and vermiculite; and the supporting material is one or more of in-situ sand, coarse sand, perlite, and ceramsite.

[0013] As a further improvement, the surface guide layer is configured at a depth of 0cm to 25cm from the ground, the channel induction layer is configured at a depth of 25cm to 45cm from the ground, and the deep resource layer is configured at a depth of 45cm to 70cm from the ground.

[0014] The beneficial effects of the present invention are: The present invention does not need to adopt the expensive foreign soil replacement method. By using in-situ sand to construct the surface guide layer, the cost investment of soil transportation and replacement is greatly reduced, and the problem of excessive economic pressure in traditional sandy soil improvement is solved; secondly, the combination of four types of substances set in the deep resource layer forms a "resource trap" effect, and through the synergistic effect of water-locking substances and water-retaining substances, the soil water holding time is significantly prolonged, avoiding the defect that the water holding time of a single material improvement is less than 3 days; at the same time, the adsorption substance can effectively absorb nutrients, reduce the leaching rate of conventional deep fertilization by more than 60%, and improve the utilization rate of fertilizer; the poor environment of the surface guide layer forces the roots to move The loose channels of the channel induction layer guide the roots to penetrate downward, and the persistent water and fertilizer advantage areas of the deep resource layer attract the roots to take root deeply, forming a root acclimation path of "downward-penetration-settlement", so that plants can obtain a more stable growth foundation in sandy soil; combined with the drip irrigation system, soil EC meter and soil tensiometer, it can realize the precise supply and regulation of water and fertilizer, create a suitable and stable environment for plant growth, further improve the planting adaptability of sandy soil, and guide the plant roots to take root deep in the soil by utilizing the instinctive nature of plant roots to move towards water and fertilizer, thereby improving the drought resistance and stress resistance of plants and optimizing plant varieties. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 The present invention is a schematic structural diagram of a method for improving the root system acclimation and layered structure of sandy soil.

[0017] In the figure: 1-surface guide layer, 2-channel induction layer, 3-deep resource layer, 4-drip irrigation system. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention for which protection is sought, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0020] Reference Figure 1 As shown, a method for improving the layered structure of sandy soil root acclimation includes: arranging a surface guide layer, a channel induction layer and a deep resource layer in sequence from top to bottom on the surface, wherein the surface guide layer is filled with in-situ sand, the channel induction layer is constructed with loose channels, and the deep resource layer includes water-locking substances, water-retaining substances, adsorbing substances and supporting substances; when it is detected that the EC value at the intersection of the surface guide layer and the channel induction layer is greater than a preset multiple of the EC value at the intersection of the channel induction layer and the deep resource layer, a nutrient induction operation is performed, wherein the nutrient induction operation is The drip irrigation system is turned on to drip-irrigate the surface guide layer according to the preset water pressure and water flow, so as to guide the nutrients in the surface guide layer to gather towards the deep resource layer; and when it is detected that the soil tension of the surface guide layer is less than the preset value, a water and fertilizer stress operation is performed, wherein the water and fertilizer stress operation is to turn off the drip irrigation system and continue for several days to guide the plant roots to search for nutrients in depth; there is no need to replace the foreign soil, and the water can be maintained for a long time to improve the utilization rate of fertilizer. On the basis of utilizing the natural tendency of the plant roots to move towards water and fertilizer, a stable water and fertilizer environment is created for the growth of plants in sandy soil, thereby improving the economy and effectiveness of the improvement technology.

[0021] In this embodiment, it is preferred to set a deep resource layer with a setting range of 45cm to 70cm underground. If the deep resource layer is shallower than 45cm, it will be disturbed by rainfall, resulting in easy loss of water and fertilizer. If the deep resource layer is deeper than 70cm, it will exceed the optimal growth range of most plant roots and cannot be effectively utilized by the roots. The channel induction layer is set within a range of 25cm to 45cm underground. Controlling the depth of the channel induction layer within this range is conducive to providing a transition zone for plant roots to adapt to environmental changes. If the depth range is too large, it may increase the penetration resistance and energy consumption of plant roots. If the depth range is too small, the roots may need to quickly enter the deep resource layer before forming a stable downward growth inertia just after escaping the barren pressure of the surface guide layer, resulting in a disorderly distribution of the roots and inability to achieve directional domestication; the surface guide layer is set within the range of 0cm to 25cm underground. If the depth range is too large, it will lead to excessive energy consumption of the plant roots and insufficient nutrient supply, resulting in growth stagnation. If the depth range is too small, the duration and intensity of the adverse pressure will be insufficient, resulting in a large-scale lateral spread of the roots in the surface guide layer, and the inability to achieve the directional deep-rooted domestication effect.

[0022] Furthermore, to encourage plant roots to grow deeper into the sandy soil, a surface guide layer is constructed. This layer is backfilled with in-situ sand—that is, the sand in the plant's environment is directly used, without the need for replacement soil. No fertilizer or organic matter is added to the surface guide layer to maintain the inherent low fertility of the sand. By maintaining the barren environment of the planting site, the surface guide layer forces plant roots to abandon surface growth and actively extend deeper into the soil. To facilitate control of the drip irrigation system, a soil EC meter and soil tensiometer are also installed in the surface guide layer. The backfilled sand is screened to remove gravel, plant debris, and impurities with a particle size of 5mm or more. This ensures a uniform sand particle size, loose soil structure, and prevents the surface guide layer structure from hindering the downward movement of plant roots.

[0023] A drip irrigation system is laid on the surface guide layer along the direction of the planting row. The drip irrigation system includes a main line, branch pipes, drip irrigation pipes, drippers and control devices. The main line is laid parallel to the planting row. The main line can be laid on the ground and fixed by fixings or buried in the surface guide layer. The branch pipe extends perpendicular to the main line to various plants. The other end of the branch pipe is connected to the drip irrigation pipe. There are multiple holes on the drip irrigation pipe, and drippers are provided on the holes. The dripper outlet is facing the center of the plant planting position to ensure that water directly acts on the surface guide layer near the root system. The dripper adopts a pressure-compensated dripper to ensure uniform water discharge when the terrain is slightly undulating or the water pressure fluctuates. The control device includes a controller, a solenoid valve and a flow meter. The control device is connected to the soil EC meter and tension The data transmitted by the meter is automatically started and stopped. When the soil EC meter monitors that the "EC value of the surface guide layer / EC value of the channel induction layer" of a certain planting position is ≥ the preset threshold, the controller automatically opens the solenoid valve in the corresponding area, and the drip irrigation system is started to replenish a certain amount of water to the surface guide layer of the corresponding planting position. After a period of time, the soil EC count value of the planting position is monitored again. If the above conditions are still met, the planting position will continue to be replenished with a certain amount of water until the conditions are no longer met. The single water supply can be adjusted according to the growth period of different plants, measured by the flow meter, and automatically shut down after reaching the preset water volume. When the soil tension meter displays "water tension < preset value", the controller suspends the drip irrigation operation until the conditions are no longer met, then the drip irrigation operation is resumed.

[0024] The EC value reflects the concentration of soluble salts in the soil solution. The higher the EC value, the more nutrient-rich the area. Therefore, in this embodiment, the soil EC meter is respectively set in the surface guide layer and the channel induction layer, and the preset threshold is set to 1.5 times. Specifically, it is set at the junction of the surface guide layer and the channel induction layer, that is, at a depth of about 25 cm. By detecting this position, it can be reflected whether nutrient accumulation is formed in the surface guide layer, resulting in the root system possibly staying in the surface guide layer instead of extending to the deep resource layer, unable to take advantage of the poor environment, forcing the plant roots to abandon surface growth and actively extend to the deep soil; and it is set at the junction of the channel induction layer and the deep resource layer, that is, at a depth of about 45 cm. This position is the entrance to the deep resource layer, and the deep resource layer needs to maintain a relatively high level to maintain the "resource trap" effect. Because sandy soils have poor water retention and rapid evaporation, salt easily rises with the water and accumulates on the surface, creating a "salt upward shift" phenomenon. This causes the EC value of the surface guidance layer to far exceed that of the deeper resource layer. This results in the root system being primarily distributed in the high salt concentration area 20 to 40 cm above the ground. This inhibits root absorption of water and fertilizer, unbalances soil nutrient distribution, and affects crop growth and development. Therefore, by leveraging drip irrigation operations and the permeability of sandy soils, and using the leaching effect of water flow, nutrients accumulated in the surface guidance layer are pushed downward to the channel induction layer and deeper resource layer. The preset threshold is set to 1.5 times. This is a precise control threshold determined based on the characteristics of sandy soil, the functional coordination requirements of the three-layer structure, and experimental verification. It aims to balance the "surface barren pressure" and the "deep resource attraction" to achieve efficient root domestication. When performing drip irrigation operations, water is injected at a pressure of 0.15MPa and the injection volume is 5m³ / ha. Setting the pressure value at 0.15MPa is conducive to allowing water to slowly penetrate the salt in the surface guide layer into the deep resource layer. If the pressure is too low, it may lead to insufficient water penetration capacity. If the pressure is too high, it may damage the soil structure and cause sand loss. Controlling the water injection volume at 5m³ / ha is based on leaching needs. If the water volume is too large, it is easy to cause water to infiltrate beyond the deep resource layer, resulting in salt loss or nutrient leaching. If the water volume is too small, it cannot effectively dilute the surface salt and the leaching effect is insufficient.

[0025] Soil tension reflects the ability of soil particles to absorb water and the availability of water within the soil. In this embodiment, the soil tensiometer is placed at a depth of 20 cm from the ground. A soil tension value of less than -30 kPa indicates low soil moisture in that layer, requiring more energy for plant roots to absorb water. Alternatively, the soil tensiometer can be placed in the surface guiding layer, a man-made "barren environment." Monitoring its tension directly reflects the degree of water stress in the surface guiding layer. When the tension is less than -30 kPa, irrigation is stopped, inducing roots to move downward in search of water. The surface guiding layer is significantly affected by evaporation and is sensitive to soil tension changes. Deeper layers, however, retain water, making soil tension relatively stable and eliminating the need for real-time monitoring. When installing the soil tensiometer, the probe must be inserted vertically 20 cm. This position is close to the junction of the surface guiding layer and the channel induction layer. Since sandy soils experience greater evaporation the closer they are to the surface, placing the soil tensiometer close to the ground is ineffective. Furthermore, a balance must be maintained between the barren environment of the surface guiding layer and its EC value.

[0026] Furthermore, in order to reduce the penetration resistance of plant roots when growing deep into sandy soil, a channel induction layer is constructed. A plurality of loose channels are provided in the channel induction layer. Fertilizer or organic matter needs to be added to the channel induction layer to better guide the plant roots to penetrate. In this embodiment, organic fertilizer, rice husks, and superphosphate are added to the channel induction layer. After the channel induction layer is constructed, a steel bar with a diameter of 10 mm is used. It is placed at a position 1 m from the ground and released so that it keeps falling in a free fall manner without adding other external forces. The insertion depth of the steel bar is detected to see whether it exceeds 25 cm. This detection method can intuitively quantify the looseness of the channel induction layer. If the steel bar insertion depth is ≥ 25 cm, it indicates that the soil structure looseness and porosity of the channel induction layer are appropriate. This loose soil environment can reduce the resistance to the downward growth of the roots, provide a physical channel for the penetration of the roots, help the roots extend from the surface guide layer to the deep resource layer, and avoid the roots from bending, stagnating or shallowing due to soil compaction during the downward growth process.

[0027] Furthermore, in order to enable the plant roots to take root deeply, a deep resource layer is constructed. The deep resource layer is provided with water-locking substances, water-retaining substances, adsorption substances and supporting substances, and the volume ratio of each substance is 35% to 45% for water-locking substances, 12% to 18% for water-retaining substances, 4% to 6% for adsorption substances, and 35% to 45% for supporting substances. The deep resource layer is the core functional area that provides long-term water and fertilizer supply for the plant roots. Through the ratio of specific materials and structured filling, an advantageous environment is formed to attract roots to take root deeply. The water-locking substance adopts fine-grained materials with a particle size of less than 0.05mm, such as bentonite, kaolin, pond mud, etc. In this embodiment, pond mud is preferably used. Pond mud is a fine-grained material with a particle size of ≤0.05mm, which can efficiently fill the pores of the deep resource layer. The original pores of sandy soil are large and permeable. The fine-grained characteristics of pond mud can reduce the water penetration rate, avoid the rapid leaching of water and fertilizer due to the high permeability of sandy soil, and provide a continuous water supply environment for the roots in the deep layer. Secondly, pond mud can play a synergistic fertilizer retention effect. Pond mud can fix some water-soluble nutrients through physical adsorption, reduce the probability of nutrients being lost with water, and work together with the adsorbent to improve the nutrient retention capacity of the deep resource layer, and at the same time work with the supporting material to maintain the stability of the structure within the layer.

[0028] The water-retaining material adopts an organic fiber material with a water absorption rate of more than 300%, such as coconut shell fiber, wood cellulose, straw, etc., and forms a transmission channel for water and nutrients. In this embodiment, straw is preferably used. Straw can quickly absorb and store water. Secondly, after the straw is crushed and decomposed, a criss-cross fiber network is formed in the deep resource layer, which can absorb and carry nutrients dissolved in water, and guide the nutrients from the channel induction layer to the root distribution area of ​​the deep resource layer, solving the problem of nutrients in sandy soil being easily lost with water and unevenly distributed, and synergizing with the adsorbent to enhance the nutrient retention effect. Secondly, elastic filling can be formed in the gaps between the coarse aggregate of the supporting material to avoid pore blockage caused by excessive compaction of the water-locking material. Its own fiber gaps can retain a certain amount of air, providing a breathable environment for the deep roots, balancing the contradiction between "water retention" and "breathability", and the decomposed straw slowly decomposes under the action of microorganisms, releasing a small amount of organic matter, which can improve the microecological environment of the deep resource layer, promote the reproduction of beneficial microorganisms, and indirectly improve the root system's absorption efficiency of nutrients. At the same time, the humus produced during its decomposition process can further enhance the water and fertilizer retention capacity of soil colloids, forming functional complementarity with the other three types of substances to jointly maintain the "resource trap" effect. Straw, as a water-retaining substance, is not only a storage part of water, but also a transmission pipeline for water and fertilizer, and a regulator of structural optimization. It is indispensable in the functional coordination of the deep resource layer and directly supports the construction of a "lasting water and fertilizer advantage area."

[0029] The adsorbent material uses a specific surface area of ​​400m 2 / g or more porous materials, such as activated carbon, zeolite, biochar, etc. Biochar is preferably used in this embodiment. Biochar can efficiently capture water-soluble nutrients in soil solution through physical adsorption, ion exchange, etc. Biochar can "lock" free nutrients in deep resource layers, reduce the proportion of loss to deep layers or surface layers with water, and provide a continuous nutrient supply source for the root system. Secondly, the adsorption effect of biochar is reversible. When the nutrient concentration in the surrounding soil solution decreases, the adsorbed nutrients can be slowly released to avoid the "sudden high and sudden low" fluctuation of nutrients in sandy soil. Biochar itself is alkaline and can neutralize sand. The potential acidity of the soil and the pH environment of the deep resource layer are optimized. At the same time, the porous structure of biochar provides a habitat for soil microorganisms, promotes microbial reproduction, indirectly enhances the root system's ability to absorb and transform nutrients, and improves the biological activity of the deep soil together with the organic matter produced by straw decomposition. Biochar, as an adsorption material, solves the pain point of easy leaching of nutrients in sandy soil through the adsorption-slow release mechanism, and optimizes the microenvironment at the same time, providing a stable nutrient basis for deep root colonization. Through multiple experiments, the depth of plant roots can be 58cm to 66cm, which is one of the core guarantees for achieving "lasting water and fertilizer advantage areas".

[0030] The supporting material uses coarse aggregate with a particle size of 0.5mm to 2mm, such as quartz sand, crushed expanded clay, sand, etc. In this embodiment, sand is preferably used. The coarse particle characteristics of sand can resist the pressure of the upper soil and the extrusion caused by root growth, avoid pore blockage caused by excessive filling of water-locking substances, and reserve necessary space for water infiltration, gas exchange and root penetration. Sand is used as a supporting material. Its particle characteristics are highly compatible with the upper and lower soil layers, which can reduce the physical resistance of the interlayer interface, so that the roots can pass through the channel induction layer and enter the deep resource layer smoothly, and extend and grow in the gaps of the sand skeleton. Sand is the "physical cornerstone" of the deep resource layer. By maintaining structural stability, coordinating water flow channels, and connecting interlayer transitions, it provides a platform for the functions of locking, retaining water, and adsorbing substances, ensuring that deep roots can obtain sufficient water and fertilizer in the "resource trap" and can grow and colonize smoothly. It is an important support for the three-layer structural coordination mechanism.

[0031] Furthermore, the specific embodiments of the present invention are as follows: Before planting, it is necessary to select a planting base with good drainage or build a good drainage system. Before planting the plant varieties, the plant roots should be pretreated with a diluted microbial agent, and a deep resource layer, a channel induction layer and a surface guide layer should be constructed in sequence at the plant planting pits. The treated plant varieties should be planted in the surface guide layer, and the surface guide layer and the channel induction layer should be measured using a soil EC meter. If the ratio of the EC value of the surface guide layer to the EC value of the channel induction layer at a certain plant location reaches the preset requirement, the drip irrigation system at the corresponding location will be started. The soil water tension at the plant planting location should be measured using a soil tensiometer. If the measured value is lower than the preset requirement, the irrigation operation at the corresponding plant planting location will be suspended for several days.

[0032] In this embodiment, a 500-fold dilution of an AM microbial agent and a 1000-fold dilution of mineral-derived potassium fulvic acid are used to immerse the plant roots. The immersion time is controlled within 30 to 50 minutes, and the bacterial strain infection rate is ensured to be more than 70%, thereby improving resource utilization efficiency, enhancing water acquisition capacity, and improving the root microenvironment. When the "EC value at a depth of 25 cm / EC value at a depth of 45 cm" of a certain plant is ≥1.5 times, the drip irrigation system at the corresponding location is started, and the drip irrigation system injects 5 m³ / ha of water at a pressure of 0.15 MPa. When the soil tensiometer at the location of a certain plant shows that the soil tension is less than -30 kPa, the drip irrigation system at the corresponding location is stopped for 4 to 6 days.

[0033] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A method for improving the root acclimation and layered structure of sandy soil, characterized in that: include: A surface guide layer, a channel induction layer, and a deep resource layer are sequentially arranged on the surface from top to bottom, wherein the surface guide layer is filled with in-situ sand, the channel induction layer is constructed with loose channels, and the deep resource layer includes water-locking substances, water-retaining substances, adsorbing substances, and supporting substances; When it is detected that the EC value at the intersection of the surface guide layer and the channel induction layer is greater than a preset multiple of the EC value at the intersection of the channel induction layer and the deep resource layer, a nutrient induction operation is performed, wherein the nutrient induction operation is to start the drip irrigation system to drip irrigate the surface guide layer according to the preset water pressure and water flow, so as to guide the nutrients in the surface guide layer to converge into the deep resource layer; Furthermore, when it is detected that the soil tension of the surface guide layer is less than a preset value, a water and fertilizer stress operation is performed, wherein the water and fertilizer stress operation is to shut down the drip irrigation system and continue for several days to guide the plant roots to search for nutrients deep down.

2. The method for improving the root acclimation and layered structure of sandy soil according to claim 1, characterized in that: The surface guide layer is used to maintain the barren environment of sandy soil.

3. The method for improving the root acclimation and layered structure of sandy soil according to claim 1, characterized in that: The channel inducing layer is provided with loose channels for the growth of plant roots.

4. The method for improving the root acclimation and layered structure of sandy soil according to claim 1, wherein: The deep resource layer is configured with areas for retaining water and fixing nutrients.

5. The method for improving the root acclimation and layered structure of sandy soil according to claim 1, characterized in that: The composition of various substances in the deep resource layer is calculated by volume percentage: water-locking substances account for 35% to 45%, water-retaining substances account for 12% to 18%, adsorbent substances account for 4% to 6%, and supporting substances account for 35% to 45%.

6. The method for improving the root acclimation and layered structure of sandy soil according to claim 5, characterized in that: The water-locking material is a fine particle material with a particle size of ≤0.05mm; the water-retaining material is an organic fiber with a water absorption rate of ≥300%; the adsorbent is a material with a specific surface area of ​​≥400m 2 / g porous material; the supporting material is coarse aggregate with a particle size of 0.5mm to 2mm.

7. The method for improving the root acclimation and layered structure of sandy soil according to claim 6, characterized in that: The water-locking substance is one or more of pond mud, clay, bentonite, and diatomaceous earth; the water-retaining material is one or more of decomposed straw, coconut husk, peat, and sawdust; the adsorption material is one or more of biochar, activated carbon, zeolite, and vermiculite; the supporting material is one or more of in-situ sand, coarse sand, perlite, and ceramsite.

8. The method for improving the root acclimation and layered structure of sandy soil according to claim 1, characterized in that: The surface guide layer is arranged at a depth of 0 cm to 25 cm from the ground, the channel induction layer is arranged at a depth of 25 cm to 45 cm from the ground, and the deep resource layer is arranged at a depth of 45 cm to 70 cm from the ground.

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