Mountain and hill orchard four-in-one system and construction method thereof

Abstract

The invention provides a four-in-one system for a mountain and hill orchard and a construction method of the four-in-one system, relates to the crossing field of agricultural engineering and fruit tree cultivation technologies, and solves the technical problems that functions of existing orchard infrastructures are split, and mechanical passing and underground environment optimization cannot be considered at the same time. The system comprises an underground three-dimensional pipe network unit, an oxygen supply unit, a rainwater recycling unit and a ground mechanical passing unit, the underground three-dimensional pipe network unit comprises multiple layers of pipelines, and all the layers of pipelines are communicated with one another; the oxygen supply unit comprises an air inlet pipe array and an exhaust pipe array; the rainwater recycling unit is arranged at the lowest part of the park and is communicated with the pipeline at the lowest layer; the ground mechanical passing unit comprises a garden surrounding path surrounding the periphery of the garden and a high-clearance shed frame, and the inner side of the garden surrounding path is connected with the end of each planting row. By the adoption of the structure, the four functions of moisture removal, oxygen supply, rainwater recycling and mechanical passing are integrated and coordinated, and the problems of waterlogging, oxygen deficit, water resource waste and low mechanization level of southern hilly orchards are effectively solved.

Description

Technical Field

[0001] This invention relates to the intersection of agricultural engineering and fruit tree cultivation technology, and in particular to a four-in-one system for orchards in mountainous and hilly areas and its construction method. Background Technology

[0002] The hilly areas in southern my country are the main production areas of specialty fruits, but they generally suffer from the problem of "three highs and one low"—high groundwater level, high air humidity, high soil density, and low level of mechanization—which seriously restricts industrial upgrading.

[0003] Currently, most orchards use open ditch drainage, which can prevent waterlogging, but the crisscrossing ditches prevent agricultural machinery from passing through, resulting in a machinery access rate of less than 35% and high labor costs, which contradicts the requirements for the mechanization of fruit tree planting.

[0004] Conventional underground drainage systems only aim to drain water and have no gas exchange function. During the rainy season, the deep soil is often deficient in oxygen, which can easily lead to root rot in fruit trees. Existing active oxygen supply technologies rely on electricity, have complex equipment, and have high operation and maintenance costs, making them difficult to promote in mountainous areas.

[0005] Traditional systems discharge rainwater directly without recycling, resulting in water waste and conflicting with irrigation needs during the dry season. Furthermore, existing single-layer pipe networks are ill-suited to the water and air gradient requirements of deep-rooted fruit trees like kiwifruit at different root depths, failing to achieve coordinated water and air regulation across the entire root system.

[0006] Previously, individual technologies could only solve a single problem, and simply combining them could not create a synergistic effect. There is an urgent need to build an integrated orchard infrastructure that takes into account drainage, oxygen supply, rainwater recycling, and mechanical access at the system level. Summary of the Invention

[0007] The purpose of this invention is to provide a four-in-one system for orchards in mountainous and hilly areas and its construction method, solving the technical problems of fragmented functions in existing orchard infrastructure and the inability to simultaneously accommodate mechanized access and underground environment optimization. The various technical effects of the preferred technical solutions provided by this invention are detailed below.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] This invention provides a four-in-one system for orchards in mountainous and hilly areas, comprising: An underground three-dimensional pipe network unit, comprising multiple layers of pipes buried underground from deep to shallow, with each layer of pipes interconnected, and the pipes having a drainage slope along the drainage direction; An oxygen supply unit, comprising an intake pipe array and an exhaust pipe array, wherein the intake pipe array is connected to the uppermost pipe and the exhaust pipe array is connected to the lowermost pipe, and the top of the exhaust pipe array is higher than the top of the intake pipe array. A rainwater harvesting unit is located at the lowest point of the park and is connected to the lowest layer of pipes. The ground machinery access unit includes a ring road surrounding the perimeter of the park and a high-clearance shed, with the inner side of the ring road connecting to the ends of each planting row.

[0010] Preferably, the underground three-dimensional pipe network unit includes at least three layers of pipes, which are, from shallow to deep, a shallow humidity regulating layer, a middle water storage and ventilation layer, and a deep drainage and recycling layer, and the drainage slope of the pipes is greater than or equal to 3%.

[0011] Preferably, the pipes in the shallow humidity regulating layer are buried at a depth of 30-60cm; the pipes in the middle water storage and ventilation layer are buried at a depth of 60-80cm; and the pipes in the deep drainage and recycling layer are buried at a depth of 80-100cm, and all pipes are provided with through holes.

[0012] Preferably, the pipes in the shallow humidity-regulating layer have a diameter of 300 mm and an opening rate of 5%; the pipes in the middle water storage and ventilation layer have a diameter of 400 mm and an opening rate of 5%; and the pipes in the deep drainage and recycling layer have a diameter of 400 mm and an opening rate of 6%.

[0013] Preferably, it also includes a connecting well and a connecting pipe, all of the multiple layers of pipes are connected to the connecting well, the lowest point of the connecting well is lower than the lowest layer of pipe, a water level regulating gate is provided in the connecting well, and the connecting pipe connects to the pipes of adjacent layers.

[0014] Preferably, the connecting wells are arranged along the planting row direction, the distance between the connecting wells is 30-50m, the inner diameter of the connecting wells is 80-100cm, the diameter of the connecting pipe is 90-120cm, and the distance between the connecting pipes is 10-30m.

[0015] Preferably, a micro-wind driven rotary exhaust hood is installed at the top of the vertical exhaust pipe of the exhaust pipe array.

[0016] This invention provides a method for constructing a four-in-one system for orchards in mountainous and hilly areas, as described above, including... The layout of the air intake pipe array, exhaust pipe array, rainwater harvesting unit, and ring road is determined based on the terrain elevation of the park. Excavate pipe trenches and lay underground three-dimensional pipe network units; Install an air intake pipe array at a high point in the park and an exhaust pipe array at a low point, so that the top of the exhaust pipe is higher than the top of the air intake pipe. Construct a rainwater harvesting unit and connect it to the lowest-level pipe; Construct a ring road around the park and install high-clearance sheds so that the ends of the planting rows connect with the flat slope of the ring road; Backfill and compact the trenches, and level the ground surface to ensure that the ground meets the requirements for unobstructed passage of agricultural machinery.

[0017] Preferably, before laying the underground three-dimensional pipeline unit, a 15cm thick, 10-30mm graded crushed stone bedding layer is laid in the pipe trench.

[0018] Preferably, trench excavation includes excavating two parallel trenches between each planting row.

[0019] The application employs the above technical solution and has at least the following beneficial effects: The underground three-dimensional pipe network unit comprises multiple layers of pipes buried underground from deep to shallow. Each layer of pipes is laid out in layers along the depth direction and interconnected, with a drainage slope along the drainage direction; this ensures drainage of the orchard. An oxygen supply unit is also included, consisting of an air intake pipe array and an exhaust pipe array. The air intake pipe array connects to the uppermost layer of pipes, and the exhaust pipe array connects to the lowermost layer, with the top of the exhaust pipe array higher than the top of the air intake pipe array. This combined operation of the oxygen supply unit and the underground three-dimensional pipe network unit achieves a combination of drainage and gas exchange, providing sufficient oxygen to the deep soil while draining, preventing root rot due to lack of oxygen, and effectively solving the problem of soil oxygen deficiency caused by conventional underground pipe drainage. The rainwater harvesting unit is located at the lowest point of the orchard and connects to the lowest layer of pipes. The system also has a rainwater harvesting function, collecting rainwater for irrigation during the dry season, alleviating the contradiction between water waste and the need for irrigation during the dry season. In addition, the ground machinery access unit includes a ring road around the perimeter of the park and a high-clearance shed. The inner side of the ring road connects to the ends of each planting row. This design fully considers the needs of machinery access, avoids the problem of agricultural machinery being unable to pass due to open ditch drainage, improves the accessibility of machinery in the orchard, reduces labor costs, and meets the requirements of the mechanization development of fruit tree planting.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a top view structural diagram of the four-in-one system for mountain and hilly orchards provided in an embodiment of the present invention; Figure 2 This is a side view structural diagram of the four-in-one system for mountain and hilly orchards provided in an embodiment of the present invention.

[0023] In the diagram: 1. Underground three-dimensional pipe network unit; 2. Oxygen supply unit; 3. Rainwater harvesting unit; 4. Ground mechanical passage unit; 5. Air intake pipe array; 6. Exhaust pipe array; 7. Connecting well; 8. Connecting pipe. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0025] A specific embodiment of the present invention provides a four-in-one system for orchards in mountainous and hilly areas, comprising: The underground three-dimensional pipe network unit 1 includes multiple layers of pipes buried underground from deep to shallow. Each layer of pipes is interconnected. The pipes are set with a drainage slope along the drainage direction. This underground three-dimensional pipe network unit 1 is set between planting rows. The purpose of setting the underground three-dimensional pipe network unit 1 is to achieve gradient dehumidification and layered oxygen supply. Oxygen supply unit 2 includes an air inlet pipe array 5 and an exhaust pipe array 6. The air inlet pipe array 5 is connected to the uppermost pipe, and the exhaust pipe array 6 is connected to the lowermost pipe. The top of the exhaust pipe array 6 is higher than the top of the air inlet pipe array 5. By setting up oxygen supply unit 2 in conjunction with underground three-dimensional pipe network unit 1, oxygen is supplied to the root system of fruit trees, thereby promoting the deep rooting of fruit trees and enhancing their drought and flood resistance. Rainwater harvesting unit 3 is located at the lowest point of the park and is connected to the lowest layer of pipes. By setting up this rainwater harvesting unit 3, the water discharged from the underground three-dimensional pipe network unit 1 can be collected and used for irrigation, thereby further reducing dependence on external water sources. Ground machinery access unit 4 includes a ring road surrounding the perimeter of the park and a high-clearance shed. The inner side of the ring road connects to the ends of each planting row. By setting up the above-mentioned units located below ground, the needs of mechanized access are met, thereby greatly improving the accessibility of agricultural machinery.

[0026] In a specific embodiment of this application, the underground three-dimensional pipe network unit 1 includes at least three layers of pipes, which are, from shallow to deep, a shallow humidity regulating layer, a middle water storage and ventilation layer, and a deep drainage and recycling layer, with a drainage slope of 3% or greater.

[0027] Specifically, the shallow moisture-regulating layer pipes are buried at a depth of 30–60 cm (preferably 40–60 cm, located below the dense root layer), and the pipe diameter can be 300 mm with an opening rate of 5%. Two pipes are distributed parallel to each planting row and are symmetrically distributed. The spacing between the two pipes is adjusted according to the row spacing (for example, when the row spacing is 4 m, the distance between the two pipes is 2 m). The pipes can be made of HDPE double-wall corrugated pipes, with the outer layer wrapped with 300 g / m² long filament geotextile. These shallow moisture-regulating layer pipes can quickly remove excess surface moisture, keep the shallow soil loose, and create a good aeration environment for capillary roots; at the same time, they serve as shallow gas exchange channels.

[0028] The pipes in the middle water storage and ventilation layer are buried at a depth of 60-80cm, with a diameter of 400mm and an opening rate of 5%. Two pipes are laid in parallel between each planting row, staggered from or directly opposite the pipes in the shallow humidity regulating layer. This helps to regulate the water and air balance in the middle layer, assists in drainage during the rainy season, and conserves moisture during the dry season. It also serves as the main gas exchange channel to supply oxygen to the main root zone.

[0029] The pipes in the deep drainage and recycling layer are buried at a depth of 80-100cm. Each pipe has a through hole, and the pipe diameter can be 400mm with an opening rate of 6% (to enhance drainage capacity). Two pipes are laid out in parallel between each planting row, aligned with the pipes in the middle water storage and aeration layer. Their function is to collect excess water from the entire garden and serve as the main drainage layer, with the end connected to the recycling pool. At the same time, they provide oxygen to the deep root system and induce the roots to grow deeper.

[0030] In some embodiments, the system also includes a connecting well 7 and a connecting pipe 8. All the multi-layer pipes are connected to the connecting well 7. The lowest point of the connecting well 7 is lower than the lowest layer pipe. A water level regulating gate is installed in the connecting well 7. The connecting pipe 8 connects to the pipes of the adjacent layer.

[0031] Specifically, the connecting wells 7 are vertically installed, with one well every 30-50m along the planting row direction. The wells have an inner diameter of 80-100cm and are constructed using precast concrete or brick masonry. The bottom of the well extends 20cm below the pipes of the deep drainage and recovery layer. All three layers of pipes open into the wells, and regulating gates are installed within them to control water and air levels between layers. These regulating gates can be located at the ports of the deep drainage and recovery layer pipes within the connecting wells 7. This allows control of the water level within the deep drainage and recovery layer pipes, thereby controlling drainage. In this configuration, the deep drainage and recovery layer pipes are used as a water storage device.

[0032] The connecting pipe 8 is installed at an angle. In the section without a well, each end is connected to the upper and lower layers by an inclined pipe to enhance gas exchange between layers. The diameter of the connecting pipe 8 ranges from 90 to 120 cm, and the distance between the connecting pipes 8 ranges from 10 to 30 m. Specifically, an inclined pipe with a diameter of 110 mm can be installed every 20 m.

[0033] By setting up connecting well 7 and connecting pipe 8, excess water in the first layer can sink to the third layer through the connecting well and be discharged; when the third layer is short of water in the dry season, the water in the second layer can replenish it; gas can flow freely between the three layers to achieve uniform oxygen supply to the entire root layer.

[0034] In some embodiments, the vertical air intake pipe array is set at a higher location in the park (e.g., inside the ring road or at the end of the planting row), and the bottom of the vertical air intake pipe array is connected to the underground three-dimensional pipe network unit 1, and it is connected to the pipe of the shallow humidity regulating layer. Specifically, this vertical air intake pipe can be a 160-200mm PVC-U pipe, and the above-ground part is 1.8-2.5m high. The vertical air intake array can consist of multiple vertical air intakes, with a spacing of 20–30 meters between them to ensure full coverage of the garden. Insect screens and rain caps are installed on top of the vertical air intakes to prevent debris from entering. The vertical exhaust pipe array is set in a low-lying area of ​​the park (e.g., outside the ring road, next to rainwater harvesting unit 3). The bottom of the vertical exhaust pipe is connected to the underground three-dimensional pipe network unit 1 and is connected to the pipe of the deep drainage and recycling layer. Specifically, this vertical exhaust pipe can be a 160-200mm PVC-U pipe, with the above-ground part 2.5-3.5m high (0.5-1.5m higher than the vertical air inlet pipe). This vertical exhaust pipe and the vertical air inlet pipe can be arranged correspondingly or staggered. A micro-wind driven rotating air extraction hood is installed on the top of the vertical exhaust pipe to enhance the suction effect with the help of wind.

[0035] The oxygen supply unit 2 in this application adopts the chimney effect, the principle of which is as follows: In summer, the underground temperature (20-25°C) is lower than the surface air temperature (30-40°C), with a temperature difference of 10-15°C. The height difference between the intake and exhaust pipes is ≥1.0m, generating a pressure difference of 5-10Pa (AP=pgHAT / T). This pressure difference drives air to flow in from the vertical intake pipe, through the three-layer pipe network (heated by the soil), and then out from the vertical exhaust pipe, forming a continuous natural convection. In winter, the reverse temperature difference can also drive a weak airflow, achieving uninterrupted oxygen supply throughout the year.

[0036] During system operation, the airflow velocity within the three-layer pipe network is 0.1–0.3 m / s, and the daily air exchange rate of each pipe can reach 50–100 m³. 3 It can meet the oxygen requirements of the rhizosphere soil within a radius of 2m.

[0037] A gate valve is also installed on the vertical exhaust pipe, which can be used to control the gas flow rate.

[0038] Rainwater harvesting unit 3 can be a return water tank, located at the lowest point of the orchard, adjacent to the end of the third-layer pipeline. It can be constructed with reinforced concrete or HDPE impermeable structure, and its volume should be designed to be 1.5 times the orchard's maximum daily drainage capacity (500-800 m³ for a 200-acre orchard). 3） The recycling tank can be equipped with a three-stage treatment system: a sedimentation tank, a filtration tank, and a clear water tank. The sedimentation tank is 2.5m deep, the filtration tank is filled with zeolite and activated carbon, and the clear water tank has an overflow pipe. The tank is also topped with a reinforced concrete slab, covered with 30cm of soil, and planted with green manure, thus not occupying ground space.

[0039] The third-layer pipe slopes towards the recycling pool at a gradient of ≥3%, allowing drainage to flow into the pool by gravity. Excess water from the first and second layers flows into the third layer through the connecting well and is then discharged centrally.

[0040] The clear water tank is equipped with a submersible pump or gravity flow outlet, which is connected to the drip irrigation system for irrigation during the dry season; the water quality is treated so that the turbidity is <10 NTU and can be used directly for drip irrigation.

[0041] All pipes in the underground three-dimensional pipe network unit 1 of the application are buried deep below the topsoil layer, so as not to affect soil cultivation and root growth; while the vertical risers of the oxygen supply unit 2 are arranged along the inner / outer side of the ring road and do not enter the planting rows; reinforced concrete road crossing sleeves with a bearing capacity of ≥20t are set where the pipes cross the ring road to ensure that agricultural machinery can pass through the ring road without damaging the underground pipes; the top of the recycling pool is covered with soil, and agricultural machinery can also pass through the ground.

[0042] The outer ring main working road has a net width of 5.0 to 5.5 meters and is made of crushed stone or hardened concrete. There are no intersecting roads inside; the ends of the planting rows connect directly to the flat slope of the ring road. Agricultural machinery can drive straight into any row of fruit trees from the ring road without having to turn around; The clearance height of the high-clearance shed is greater than or equal to 1.85m; small and medium-sized agricultural machinery can move freely under the shed.

[0043] This invention is result-oriented towards mechanized passage, integrating four major functions: dehumidification, oxygen supply, recycling, and passage.

[0044] A specific embodiment of the present invention provides a method for constructing a four-in-one system for orchards in mountainous and hilly areas, comprising: Based on the terrain elevation of the park, the layout of air intake pipe array 5, exhaust pipe array 6, rainwater harvesting unit 3, and the ring road around the park was determined; The process involves excavating trenches and laying underground three-dimensional pipe network unit 1. Specifically, the trench excavation includes excavating trenches for laying underground three-dimensional pipe network unit 1, trenches for setting up connecting wells 7, and return water trenches for forming rainwater harvesting unit 3. Before laying the pipes, a 15cm thick 10-30mm graded crushed stone bedding layer needs to be laid in the trench to enhance permeability and stability. Reinforced concrete road crossing sleeves are pre-installed at the locations where pipes will be installed under the ring road. Pipes are laid sequentially on each layer of underground three-dimensional pipe network unit 1. Simultaneously, connecting wells 7 are constructed, and connecting pipes 8 are installed between adjacent pipes. Connecting wells 7 can be made of precast concrete pipes or brick masonry.

[0045] An air intake pipe array 5 is installed at a high point in the park, with the bottom end of the vertical air intake pipe connected to the pipe of the shallow humidity conditioning layer. An exhaust pipe array 6 is installed at a low point, with the bottom end of the vertical air intake pipe connected to the pipe of the deep drainage and recycling layer, and ensuring that the top of the exhaust pipe is higher than the top of the air intake pipe. Construct rainwater harvesting unit 3 and connect it to the lowest layer of pipes. In the excavated return water ditch, construct the main structure of the return water tank using reinforced concrete or HDPE anti-seepage structure. Separate the tank into sedimentation chamber, filtration chamber, and clear water chamber according to the actual situation. Fill the filtration chamber with zeolite and activated carbon, and install an overflow pipe in the clear water chamber. Then, install a reinforced concrete cover plate on the top of the tank, cover it with 30cm of soil, and plant green manure.

[0046] Construct a ring road around the park and install high-clearance sheds so that the ends of the planting rows connect with the flat slope of the ring road; Backfill and compact the trenches, and level the ground surface to ensure that the ground meets the requirements for unobstructed passage of agricultural machinery.

[0047] In some embodiments, trench excavation includes excavating two parallel trenches between each planting row.

[0048] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," and "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention 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 the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A four-in-one system for orchards in mountainous and hilly areas, characterized in that, include: An underground three-dimensional pipe network unit, comprising multiple layers of pipes buried underground from deep to shallow, with each layer of pipes interconnected, and the pipes having a drainage slope along the drainage direction; An oxygen supply unit, comprising an intake pipe array and an exhaust pipe array, wherein the intake pipe array is connected to the uppermost pipe and the exhaust pipe array is connected to the lowermost pipe, and the top of the exhaust pipe array is higher than the top of the intake pipe array. A rainwater harvesting unit is located at the lowest point of the park and is connected to the lowest layer of pipes. The ground machinery access unit includes a ring road surrounding the perimeter of the park and a high-clearance shed, with the inner side of the ring road connecting to the ends of each planting row.

2. The integrated system for mountain and hilly orchards according to claim 1, characterized in that, The underground three-dimensional pipe network unit includes at least three layers of pipes, which are, from shallow to deep, a shallow humidity regulating layer, a middle water storage and ventilation layer, and a deep drainage and recycling layer. The drainage slope of the pipes is greater than or equal to 3%.

3. The integrated system for mountain and hilly orchards according to claim 2, characterized in that, The pipes in the shallow humidity regulating layer are buried at a depth of 30-60cm; the pipes in the middle water storage and ventilation layer are buried at a depth of 60-80cm; and the pipes in the deep drainage and recycling layer are buried at a depth of 80-100cm. All pipes are provided with through holes.

4. The integrated system for orchards in mountainous and hilly areas according to claim 3, characterized in that, The pipes in the shallow humidity-regulating layer have a diameter of 300 mm and an opening rate of 5%; the pipes in the middle water storage and ventilation layer have a diameter of 400 mm and an opening rate of 5%; and the pipes in the deep drainage and recycling layer have a diameter of 400 mm and an opening rate of 6%.

5. The integrated system for orchards in mountainous and hilly areas according to claim 1, characterized in that, It also includes a connecting well and a connecting pipe. All the multiple layers of the pipe are connected to the connecting well. The lowest point of the connecting well is lower than the lowest layer of the pipe. A water level regulating gate is installed in the connecting well. The connecting pipe connects to the pipes of the adjacent layers.

6. The integrated system for orchards in mountainous and hilly areas according to claim 5, characterized in that, The connecting wells are arranged along the planting row direction, the distance between the connecting wells ranges from 30 to 50m, the inner diameter of the connecting wells ranges from 80 to 100cm, the diameter of the connecting pipes ranges from 90 to 120cm, and the distance between the connecting pipes ranges from 10 to 30m.

7. The integrated system for orchards in mountainous and hilly areas according to claim 1, characterized in that, The vertical exhaust pipes of the exhaust pipe array are equipped with a micro-wind driven rotating exhaust hood at their top ends.

8. A method for constructing a four-in-one system for orchards in mountainous and hilly areas as described in any one of claims 1 to 7, characterized in that, include: The layout of the air intake pipe array, exhaust pipe array, rainwater harvesting unit, and ring road is determined based on the terrain elevation of the park. Excavate pipe trenches and lay underground three-dimensional pipe network units; Install an air intake pipe array at a high point in the park and an exhaust pipe array at a low point, so that the top of the exhaust pipe is higher than the top of the air intake pipe. Construct a rainwater harvesting unit and connect it to the lowest-level pipe; Construct a ring road around the park and install high-clearance sheds so that the ends of the planting rows connect with the flat slope of the ring road; Backfill and compact the trenches, and level the ground surface to ensure that the ground meets the requirements for unobstructed passage of agricultural machinery.

9. The construction method according to claim 8, characterized in that, Before laying the underground three-dimensional pipeline unit, a 15cm thick, 10-30mm graded crushed stone bedding layer is laid in the pipe trench.

10. The construction method according to claim 8, characterized in that, Trench excavation involves digging two parallel trenches between each planting row.

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