Optimization method of macadamia tree root morphology and targeted micro-irrigation system in yunnan red soil

By using a multi-point source spatial targeted root zone micro-irrigation system, the root morphology of macadamia trees is optimized, solving the problem that traditional irrigation methods cannot meet the needs of the root system. This results in deeper root growth and enhanced drought resistance, thereby improving the growth stability and yield of the fruit trees.

CN118575736BActive Publication Date: 2026-02-17YUNNAN AGRICULTURAL UNIVERSITY
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Patent Information

Application Number
CN202410791596.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-19
Publication Date
2026-02-17
Estimated Expiration
2044-06-19

AI Technical Summary

Technical Problem

Traditional irrigation methods cannot accurately meet the root needs of macadamia trees, resulting in shallow root systems that affect tree growth and yield.

Method used

The multi-point source spatial targeted root zone micro-irrigation system induces differentiated growth of lateral roots and taproots through shallow multi-point targeted water distribution and deep water transport. Combined with flow-adjustable permeable drip irrigation and negative pressure-resistant permeable drip irrigation, it forms an interlaced irrigation point source array, achieving deep root development and enhanced drought resistance.

Benefits of technology

It improves the drought and wind resistance of the root system, enhances nutrient absorption efficiency, and ensures stable growth and high yield of fruit trees in the red soil region of Yunnan.

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Abstract

The application provides a method for optimizing the root system morphology of a macadamia tree in Yunnan red soil and a targeted micro-irrigation system. The method for optimizing the root system morphology of the macadamia tree in the Yunnan red soil first induces the main root of the plant to extend and grow deeply by means of shallow multi-point targeted water distribution under multi-point source spatial targeted root zone micro-irrigation and effective delivery of deep soil moisture under multi-point source spatial targeted root zone micro-irrigation, so as to enhance the anchoring force and drought resistance of the root system. The deep target zone realizes deep rooting of the root system by corresponding target irrigation, so as to improve the drought resistance and wind resistance of the root system. The method for optimizing the root system morphology of the macadamia tree in the Yunnan red soil and the targeted micro-irrigation system provided by the application enable the macadamia tree to survive and grow smoothly under the conditions of the Yunnan red soil and climate, and the method precisely meets the demand of the root system of the macadamia tree, so that the deep growth of the root system is beneficial to improving the survival rate and later yield.
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Description

Technical Field

[0001] This invention relates to the field of macadamia tree cultivation technology in Yunnan red soil, and particularly to a method for optimizing the root morphology of macadamia trees in Yunnan red soil and a targeted micro-irrigation system. Background Technology

[0002] Macadamia nuts, native to Australia, are known as the "King of Nuts." The macadamia tree, belonging to the genus Macadamia in the family Proteaceae, is an evergreen, tall tree. It has become one of the most popular fruit trees introduced and cultivated in southern my country. Currently, Yunnan Province has the largest macadamia nut planting area in the world. The main macadamia nut producing areas are concentrated in Yunnan's tropical regions, such as Lincang, Dehong, and Xishuangbanna. Vigorously developing the macadamia nut industry in Yunnan not only brings economic and ecological benefits but also has significant practical implications for promoting economic development in border areas.

[0003] Yunnan red soil, due to its heavy and sticky texture, makes it difficult for local water to sink. This provides the soil conditions and target objects for multi-point source targeted micro-irrigation. The root system of macadamia trees in Yunnan is very shallow, with many clustered roots but very weak taproots, resulting in poor wind and drought resistance. In addition, Yunnan experiences seasonal drought, and the plateau mountain monsoon climate leads to very strong local winds.

[0004] The red soil region of Yunnan is suitable for planting macadamia trees due to its unique soil and climate conditions. However, traditional irrigation methods such as surface irrigation and sprinkler irrigation cannot accurately meet the needs of macadamia tree roots, resulting in a serious problem of shallow root morphology, which affects the growth and yield of the fruit trees in the later stages.

[0005] Therefore, it is necessary to provide a method for optimizing the root morphology of macadamia trees in Yunnan red soil and a targeted micro-irrigation system to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a method for optimizing the root morphology of macadamia trees in Yunnan red soil and a targeted micro-irrigation system. It solves the problem that traditional irrigation methods, such as surface flooding and sprinkler irrigation, cannot accurately meet the needs of macadamia tree roots, resulting in severely shallow root morphology, which affects the growth and yield of fruit trees in the later stages.

[0007] To solve the above-mentioned technical problems, the method for optimizing the root morphology of macadamia trees in Yunnan red soil provided by the present invention includes the following steps:

[0008] S1: First, by using the shallow multi-point targeted water distribution under the multi-point source spatial targeted root zone micro-irrigation method, the lateral roots of macadamia trees in Yunnan, including the roots of longan, are induced to extend horizontally to fully obtain phosphorus from the shallow soil. Because phosphorus is scarce in Yunnan red soil and is mainly distributed in the shallow soil, the shallow target area is irrigated at the corresponding target points to enable the roots to seek nutrition, that is, to obtain phosphorus.

[0009] S2: Then, by using the effective transport of deep soil water under the multi-point source spatial targeted root zone micro-irrigation method, the main root of the plant is induced to extend and grow vertically, so as to enhance the anchoring force and drought resistance of the root system. That is, the deep target area achieves deep root growth through irrigation at the corresponding target point, so as to improve the drought resistance and wind resistance of the root system.

[0010] S3: For the shallow distribution target area, considering the shallow root system of macadamia trees, the lateral roots are large and the horizontal width is large, so an adjustable flow rate permeable dripper 20 is adopted. The permeable dripper 20 has a porous and horizontal water outlet. For the deep distribution target area, considering the deep root system of macadamia trees to induce the main root to grow deep, as well as the negative pressure clogging problem of the permeable dripper 20, a single-hole vertical water outlet permeable dripper 20 is adopted.

[0011] S4: The distribution of target points is mainly based on a multi-point source spatial pattern, that is, 2-3 targets are arranged in the shallow soil and 2-3 targets are arranged in the deep soil, and the shallow and deep targets are staggered to form a spatial irrigation point source array. Then, it is laid on the greenhouse ground according to the multi-point source spatial targeted root zone micro-irrigation method, thus forming a macadamia tree root targeted micro-irrigation system in Yunnan red soil.

[0012] The macadamia tree grown in the specific soil type of Yunnan red soil demonstrates the regional and crop-specific nature of this invention, thus suggesting its potential for practical application. Furthermore, the optimization of root morphology and the application of targeted micro-irrigation systems are expected to improve the crop's drought resistance and nutrient absorption efficiency, which is of practical significance for agricultural production.

[0013] A targeted micro-irrigation system for macadamia tree roots in Yunnan red soil includes: a base plate, a conveying assembly installed on the top of the base plate, a water tank installed on the top of the base plate, a conveying pipe installed at the output end of the conveying assembly, an elbow fixedly connected to the other end of the conveying pipe, and a control box with a door installed on the top of the base plate.

[0014] The elbow can adjust the conveying direction of the conveying pipe. The conveying component is connected to the water tank, and a lock is installed on the tank door.

[0015] Preferably, a connecting pipe is installed at the other end of the elbow, a solenoid valve is fixedly connected to the other end of the connecting pipe, and a straight ball valve is installed at the other end of the solenoid valve.

[0016] The solenoid valve is an imported 1.0-inch solenoid valve, and the elbow is a PVC 90-degree elbow.

[0017] Preferably, the outer surface of the solenoid valve and the straight ball valve is provided with a circular valve box, and the other end of the straight ball valve is equipped with a fixing pipe;

[0018] The circular valve box has openings on both sides for connecting pipes and fixing pipes to pass through. The circular valve box can be buried in the soil, with only a part of it exposed.

[0019] Preferably, the other end of the fixed tube is fixedly connected to a first four-way connector, and two outlets of the first four-way connector are respectively equipped with three-way connectors.

[0020] Preferably, one of the outlets of the two three-way connectors is equipped with a second four-way connector, and the other end of the second four-way connector is equipped with a straight-through valve via a connecting pipe;

[0021] The second four-way connector connects to one of the outlets of the two three-way connectors via a pipe; see details below. Figure 3 A straight-through valve can be connected to a pipeline, and the pipeline connected to the straight-through valve also has a structure that fixes the other end of the pipe.

[0022] Preferably, the other outlet of the first four-way connector, the two three-way connectors, and the second four-way connector are all equipped with a cannula, and the bottom end of the cannula is equipped with a permeation drip tube via an installation plate;

[0023] Infiltration drips are inserted into the soil, and the length of the drip tubes varies.

[0024] Preferably, a stirring assembly is installed on the top of the water tank. The stirring assembly includes a protective shell. The front and back of the protective shell are provided with heat dissipation holes. A drive motor is installed inside the protective shell. A rotating rod is installed at the output end of the drive motor. A stirring rod is installed at the bottom end of the rotating rod through a mounting ring. The conveying assembly includes a mounting shell. A conveying pump is installed inside the mounting shell. A suction pipe is installed at the inlet of the conveying pump.

[0025] The rotating rod and stirring rod are located inside the water tank, which can accelerate the dissolution of fertilizer and water. The other end of the suction tube is connected to the water tank.

[0026] Preferably, an externally threaded tube is installed at the bottom of the mounting plate, and an internally threaded tube is threadedly connected to the outer surface of the externally threaded tube.

[0027] The outer surface of the internally threaded pipe is provided with anti-slip texture.

[0028] Preferably, a partition tube is fixedly connected to the bottom end of the internally threaded tube, the bottom end of the partition tube has an insertion port, and a blocking disc is fixedly connected to the inside of the partition tube near the bottom end.

[0029] The outer surface of the separator pipe has holes to facilitate water seepage.

[0030] Compared with related technologies, the method for optimizing the root morphology of macadamia trees in Yunnan red soil and the targeted micro-irrigation system provided by this invention have the following beneficial effects:

[0031] This invention provides a method for optimizing the root morphology of macadamia trees in Yunnan red soil and a targeted micro-irrigation system. Utilizing this method, targeted water supply can be provided to different areas based on the varying physiological needs of the roots, enabling differentiated growth in different root regions. Furthermore, multi-frequency micro-irrigation is employed, changing the traditional intermittent irrigation pattern to a more gradual, targeted approach. Water is supplied in real-time according to the crop's water requirements. Through intelligent units, real-time monitoring of soil moisture and nutrients achieves intelligent, micro-volume, and on-demand irrigation and fertilization. This design allows macadamia trees to survive and grow successfully in the Yunnan red soil and climate conditions. The optimized root morphology method precisely meets the root needs of macadamia trees, allowing for deeper root growth, which improves survival rate and later yield. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the root zone shallow multi-point source targeted micro-irrigation principle provided by the present invention;

[0033] Figure 2 This is a schematic diagram of the first embodiment of the method for optimizing the root morphology of macadamia trees in Yunnan red soil and the targeted micro-irrigation system provided by the present invention.

[0034] Figure 3 Provided for the present invention Figure 2 An enlarged view of point A shown;

[0035] Figure 4 A schematic diagram of the rotating rod is provided for this invention;

[0036] Figure 5 A schematic diagram of the delivery pump is provided for this invention;

[0037] Figure 6 This is a schematic diagram of the second embodiment of the method for optimizing the root morphology of macadamia trees in Yunnan red soil and the targeted micro-irrigation system provided by the present invention.

[0038] Figure 7 A schematic diagram of the blocking disc is provided for the present invention.

[0039] The diagram is labeled as follows: 1. Base plate, 2. Control box, 3. Box door, 4. Water tank, 5. Stirring assembly, 501. Protective shell, 502. Heat dissipation hole, 503. Drive motor, 504. Mounting ring, 505. Stirring rod, 506. Rotating rod, 6. Conveying assembly, 601. Conveying pump, 602. Mounting shell, 603. Suction pipe, 7. Conveying pipe, 8. Elbow, 9. Connecting pipe, 10. Circular valve box, 11. Fixed pipe, 12. Straight ball valve, 13. Solenoid valve, 14. First four-way connector, 15. T-connector, 16. Second four-way connector, 17. Connecting pipe, 18. Straight valve, 19. Mounting plate, 20. Permeation drip tube, 21. Inserted tube, 22. Internally threaded pipe, 23. Separating pipe, 24. Blocking plate, 25. Socket, 26. Externally threaded pipe. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] First Embodiment

[0042] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 This is a schematic diagram of the root zone shallow multi-point source targeted micro-irrigation principle provided by the present invention; Figure 2 This is a schematic diagram of the first embodiment of the method for optimizing the root morphology of macadamia trees in Yunnan red soil and the targeted micro-irrigation system provided by the present invention. Figure 3 Provided for the present invention Figure 2 An enlarged view of point A shown; Figure 4 A schematic diagram of the rotating rod is provided for this invention; Figure 5 This invention provides a schematic diagram of the delivery pump. The method for optimizing the root morphology of macadamia trees in Yunnan red soil includes the following steps:

[0043] S1: First, by using the shallow multi-point targeted water distribution under the multi-point source spatial targeted root zone micro-irrigation method, the lateral roots of macadamia trees in Yunnan, including the roots of longan, are induced to extend horizontally to fully obtain phosphorus from the shallow soil. Because phosphorus is scarce in Yunnan red soil and is mainly distributed in the shallow soil, the shallow target area is irrigated at the corresponding target points to enable the roots to seek nutrition, that is, to obtain phosphorus.

[0044] S2: Then, by using the effective transport of deep soil water under the multi-point source spatial targeted root zone micro-irrigation method, the main root of the plant is induced to extend and grow vertically, so as to enhance the anchoring force and drought resistance of the root system. That is, the deep target area achieves deep root growth through irrigation at the corresponding target point, so as to improve the drought resistance and wind resistance of the root system.

[0045] S3: For the shallow distribution target area, considering the shallow root system of macadamia trees, the lateral roots are large and the horizontal width is large, so an adjustable flow rate permeable dripper 20 is adopted. The permeable dripper 20 with a porous and horizontal water outlet is adopted. For the deep distribution target area, considering the deep root system of macadamia trees to induce the main root to grow deep, a negative pressure resistant permeable dripper 20 with a single hole vertical water outlet is adopted.

[0046] S4: The distribution of target points is mainly based on a multi-point source spatial pattern, that is, 2-3 targets are arranged in the shallow soil and 2-3 targets are arranged in the deep soil, and the shallow and deep targets are staggered to form a spatial irrigation point source array. Then, it is laid on the greenhouse ground according to the multi-point source spatial targeted root zone micro-irrigation method, thus forming a macadamia tree root targeted micro-irrigation system in Yunnan red soil.

[0047] The macadamia tree grown in the specific soil type of Yunnan red soil demonstrates the regional and crop-specific nature of this invention, thus suggesting its potential practical application value. Furthermore, the optimization of root morphology and the application of targeted micro-irrigation systems are expected to improve the crop's drought resistance and nutrient absorption efficiency, which is of practical significance for agricultural production. The scope of protection for the optimization of macadamia tree root morphology and the application of targeted micro-irrigation systems in Yunnan red soil helps ensure the patent's uniqueness and commercial value, while avoiding conflicts with existing technologies or previous patents.

[0048] A targeted micro-irrigation system for macadamia tree roots in Yunnan red soil includes: a base plate 1, a conveying assembly 6 installed on the top of the base plate 1, a water tank 4 installed on the top of the base plate 1, a conveying pipe 7 installed at the output end of the conveying assembly 6, an elbow 8 fixedly connected to the other end of the conveying pipe 7, and a control box 2 with a door 3 installed on the top of the base plate 1.

[0049] The elbow 8 can adjust the conveying direction of the conveying pipe 7. The conveying component 6 is connected to the water tank 4. A lock is installed on the tank door 3. An electric switch is installed inside the control box 2.

[0050] The other end of the elbow 8 is equipped with a connecting pipe 9, and the other end of the connecting pipe 9 is fixedly connected to a solenoid valve 13. The other end of the solenoid valve 13 is equipped with a straight ball valve 12.

[0051] Solenoid valve 13 is an imported 1.0-inch solenoid valve, elbow 8 is a PVC 90-degree elbow, and straight ball valve 12 is a PVC straight ball valve.

[0052] A circular valve box 10 is provided on the outer surface of the solenoid valve 13 and the straight ball valve 12, and a fixed pipe 11 is installed at the other end of the straight ball valve 12.

[0053] The circular valve box 10 has openings on both sides for the connecting pipe 9 and the fixing pipe 11 to pass through. The circular valve box 10 can be buried in the soil, with only a part of it exposed.

[0054] The other end of the fixed tube 11 is fixedly connected to a first four-way connector 14, and two outlets of the first four-way connector 14 are respectively equipped with three-way connectors 15.

[0055] The tee connector 15 is connected to the first four-way connector 14 via a pipe.

[0056] One of the outlets of the two three-way connectors 15 is equipped with a second four-way connector 16, and the other end of the second four-way connector 16 is equipped with a straight-through valve 18 via a connecting pipe 17;

[0057] The second four-way connector 16 connects to one of the outlets of the two three-way connectors 15 via a pipe, see details. Figure 3 The straight-through valve 18 can be connected to a pipeline, and the pipeline connected to the straight-through valve 18 is also equipped with a structure at the other end of the fixed pipe 11.

[0058] The other outlet of the first four-way connector 14, the two three-way connectors 15, and the second four-way connector 16 are all equipped with a cannula 21, and the bottom end of the cannula 21 is equipped with a permeation drip tube 20 through the mounting plate 19.

[0059] The permeation drip tube 20 is inserted into the soil. The length of the insertion tube 21 varies, allowing the permeation drip tube 20 to be inserted into the soil at different depths.

[0060] The top of the water tank 4 is equipped with a stirring assembly 5, which includes a protective shell 501. The protective shell 501 has heat dissipation holes 502 on both the front and back. The protective shell 501 is equipped with a drive motor 503. The output end of the drive motor 503 is equipped with a rotating rod 506. The bottom end of the rotating rod 506 is equipped with a stirring rod 505 through a mounting ring 504. The conveying assembly 6 includes a mounting shell 602. The mounting shell 602 is equipped with a conveying pump 601. The inlet of the conveying pump 601 is equipped with a suction pipe 603.

[0061] The rotating rod 506 and the stirring rod 505 are inside the water tank 4, which can accelerate the dissolution of fertilizer and water. The other end of the suction pipe 603 is connected to the water tank 4, and the outlet of the delivery pump 601 is connected to the delivery pipe 7.

[0062] The working principle of the method for optimizing the root morphology of macadamia trees in Yunnan red soil and the targeted micro-irrigation system provided by this invention is as follows:

[0063] To ensure stable root growth in macadamia trees, a multi-point, spatially targeted root zone micro-irrigation method was first used to induce shallow, multi-point targeted water distribution, including that of longan trees, to extend horizontally and fully access shallow soil phosphorus. Then, the effective transport of deep soil water through the same method induced vertical growth of the taproot, enhancing root anchorage and drought resistance. Specifically, the deep target zone achieved deep root growth through targeted irrigation, improving drought and wind resistance. Considering the shallow root system of macadamia trees, with its large lateral roots and wide horizontal reach, a 20mm adjustable-flow permeable drip irrigation system was used in the shallow distribution target zone. The permeable drip irrigation system 20 with horizontal water discharge is designed to induce deep root growth in macadamia trees. Therefore, a single-hole vertical water discharge system is used in the target area, designed to withstand negative pressure. The target points are distributed in a multi-point source spatial pattern, with 2-3 points in the shallow soil and 2-3 points in the deep soil, staggered to form a spatial irrigation point source array. This design allows macadamia trees to survive and grow successfully in the red soil and climate conditions of Yunnan. By utilizing the root morphology optimization method for macadamia trees in Yunnan red soil, the needs of the macadamia tree root system are precisely met, allowing for deep root growth, which is beneficial for improving survival rate and later yield.

[0064] Compared with related technologies, the method for optimizing the root morphology of macadamia trees in Yunnan red soil and the targeted micro-irrigation system provided by this invention have the following beneficial effects:

[0065] By utilizing a root system morphology optimization method for macadamia trees in Yunnan red soil, targeted irrigation can be provided in zones according to the different physiological needs of the root system, thereby achieving differentiated growth in different parts of the root system. In addition, multi-frequency micro-irrigation is adopted, changing the traditional intermittent irrigation pattern to achieve slow and steady watering. Water is supplied in real time according to the crop's water requirements. Through intelligent units, intelligent, micro-volume, and on-demand irrigation and fertilization are achieved based on real-time monitoring of soil moisture and nutrients. This design allows macadamia trees to survive and grow successfully in the Yunnan red soil and climate conditions. The root system morphology optimization method for macadamia trees in Yunnan red soil precisely meets the needs of the macadamia tree root system, allowing the roots to grow deep, which is conducive to improving the survival rate and later yield.

[0066] Second Embodiment

[0067] Please refer to the following: Figures 6-7 , Figure 6 This is a schematic diagram of the second embodiment of the method for optimizing the root morphology of macadamia trees in Yunnan red soil and the targeted micro-irrigation system provided by the present invention. Figure 7This invention provides a schematic diagram of the blocking disc structure. Based on the first embodiment of this application, which provides a method for optimizing the root morphology of macadamia trees in Yunnan red soil and a targeted micro-irrigation system, the second embodiment of this application proposes another method for optimizing the root morphology of macadamia trees in Yunnan red soil and a targeted micro-irrigation system. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0068] Specifically, the difference between the root morphology optimization method for macadamia trees in Yunnan red soil provided in the second embodiment of this application and the targeted micro-irrigation system is that an external threaded pipe 26 is installed at the bottom of the mounting plate 19, and an internal threaded pipe 22 is threadedly connected to the outer surface of the external threaded pipe 26.

[0069] The outer surface of the internally threaded tube 22 is provided with anti-slip texture, and the bottom of the mounting plate 19 is equipped with a permeation drip tube 20.

[0070] The bottom end of the internally threaded tube 22 is fixedly connected to a partition tube 23, and the bottom end of the partition tube 23 is provided with a socket 25. A blocking disc 24 is fixedly connected inside the partition tube 23 near the bottom end.

[0071] The outer surface of the separator 23 has holes to facilitate water seepage. The position of the baffle plate 24 is referenced. Figure 6 The bottom of the blocking disc 24 has a hole.

[0072] Compared with related technologies, the method for optimizing the root morphology of macadamia trees in Yunnan red soil and the targeted micro-irrigation system provided by this invention have the following beneficial effects:

[0073] To prevent the outlet of the permeable dripper 20 from being blocked by soil after being inserted into the soil, an externally threaded pipe 26 is welded to the bottom of the mounting plate 19, and the permeable dripper 20 passes through the inside of the externally threaded pipe 26. Then, the externally threaded pipe 26 and the internally threaded pipe 22 are connected by threads. A separator pipe 23 with a hole on its outer surface is installed at the bottom of the internally threaded pipe 22. A baffle plate 24 is installed near the bottom of the separator pipe 23. To facilitate the insertion of the separator pipe 23 into the soil, an insertion port 25 is provided at the bottom of the separator pipe 23, which can reduce the resistance when inserted into the soil. After preparation, the permeable dripper 20 with the separator pipe 23 installed is simply inserted into the soil. This structure can use the separator pipe 23 to separate the soil and prevent the soil from blocking the outlet of the permeable dripper 20. The outer surface of the separator pipe 23 has holes that allow water to permeate out. Since there is a certain distance between the separator pipe 23 and the permeable dripper 20, the permeable dripper 20 is prevented from becoming blocked after being inserted into the soil.

[0074] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for optimizing the root morphology of macadamia trees in Yunnan red soil, characterized in that, Includes the following steps: S1: First, by using the shallow multi-point targeted water distribution under the multi-point source spatial targeted root zone micro-irrigation method, the lateral roots of macadamia trees in Yunnan, including the roots of longan, are induced to extend horizontally to fully obtain phosphorus from the shallow soil. Because phosphorus is scarce in Yunnan red soil and is mainly distributed in the shallow soil, the shallow target area is irrigated at the corresponding target points to enable the roots to seek nutrition, that is, to obtain phosphorus. S2: Then, by using the effective transport of deep soil water under the multi-point source spatial targeted root zone micro-irrigation method, the main root of the plant is induced to extend and grow vertically, so as to enhance the anchoring force and drought resistance of the root system. That is, the deep target area achieves deep root growth through irrigation at the corresponding target point, so as to improve the drought resistance and wind resistance of the root system. S3: For the shallow distribution target area, considering the shallow root system of macadamia trees, the lateral roots are large and the horizontal width is large, so an adjustable flow rate permeable dripper 20 is adopted. The permeable dripper 20 with a porous and horizontal water outlet is adopted. For the deep distribution target area, considering the deep root system of macadamia trees to induce the main root to grow deep, a negative pressure resistant permeable dripper 20 with a single hole vertical water outlet is adopted. S4: The distribution of target points is mainly based on a multi-point source spatial pattern, that is, 2-3 targets are arranged in the shallow soil and 2-3 targets are arranged in the deep soil, and the shallow and deep target points are staggered to form a spatial irrigation point source array. Then, it is laid on the greenhouse ground according to the multi-point source spatial targeted root zone micro-irrigation method, thus forming a macadamia tree root targeted micro-irrigation system in Yunnan red soil.

2. A targeted micro-irrigation system for macadamia tree roots in Yunnan red soil, characterized in that, The method for optimizing the root morphology of macadamia trees in Yunnan red soil as described in claim 1 further includes: a base plate, a conveying assembly installed on the top of the base plate, a water tank installed on the top of the base plate, a conveying pipe installed at the output end of the conveying assembly, an elbow fixedly connected to the other end of the conveying pipe, a control box with a door installed on the top of the base plate, a connecting pipe installed at the other end of the elbow, a solenoid valve fixedly connected to the other end of the connecting pipe, a straight ball valve installed at the other end of the solenoid valve, a circular valve box provided on the outer surface of the solenoid valve and the straight ball valve, a fixed pipe installed at the other end of the straight ball valve, a first four-way connector fixedly connected to the other end of the fixed pipe, two outlets of the first four-way connector respectively installed with three-way connectors, one outlet of the two three-way connectors installed with a second four-way connector, a straight valve installed at the other end of the second four-way connector via a connecting pipe, and an insertion tube installed at the other outlet of the first four-way connector, the two three-way connectors and the second four-way connector, with a permeable drip tube installed at the bottom end of the insertion tube via an installation plate.

3. The targeted micro-irrigation system for macadamia tree roots in Yunnan red soil according to claim 2, characterized in that, A stirring assembly is installed on the top of the water tank. The stirring assembly includes a protective shell. The protective shell has heat dissipation holes on both the front and back. A drive motor is installed inside the protective shell. A rotating rod is installed at the output end of the drive motor. A stirring rod is installed at the bottom end of the rotating rod through a mounting ring. The conveying assembly includes a mounting shell. A conveying pump is installed inside the mounting shell. A suction pipe is installed at the inlet of the conveying pump.

4. The targeted micro-irrigation system for macadamia tree roots in Yunnan red soil according to claim 2, characterized in that, The bottom of the mounting plate is fitted with an externally threaded tube, and the outer surface of the externally threaded tube is threaded with an internally threaded tube.

5. The targeted micro-irrigation system for macadamia tree roots in Yunnan red soil according to claim 4, characterized in that, The bottom end of the internally threaded tube is fixedly connected to a partition tube, the bottom end of the partition tube has an insertion port, and a blocking disc is fixedly connected inside the partition tube near the bottom end.

Citation Information

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