Heat preservation type sweet potato film mulching planting method and equipment

Abstract

The invention belongs to the technical field of sweet potato planting, and particularly relates to a heat preservation type sweet potato film mulching planting method which comprises the following steps that S1, ridging is conducted, ridge rows are arranged in pairs, and a furrow is formed between every two adjacent ridge rows; s2, laying a bottom film in the furrow; s3, sweet potato seedlings are planted, and seedling tips overhang on one side of the furrows; s4, covering the ridge top with soil to bury roots of the sweet potato seedlings; s5, top films are laid, and heat preservation cavities for sweet potato seedlings to grow are defined by the bottom films and the top films in the furrows; and S6, after the environment temperature reaches the standard, tearing the top film at the furrow position, so that the sweet potato seedlings grow in the open air. According to the method, the ridge rows are formed in a ridging mode, the bottom film is laid between the ridge rows, and the top film is erected between the ridge rows, so that the furrow between the two ridge rows is closed to form a greenhouse for sweet potato seedlings to grow, the external low-temperature environment is isolated, sowing can be conducted 7-10 days in advance, the harvesting period is advanced, the market can be seized conveniently, and better economic benefits are obtained.

Description

Technical Field

[0001] This invention belongs to the field of sweet potato planting technology, specifically relating to a heat-insulating sweet potato mulching planting method and equipment. Background Technology

[0002] In traditional sweet potato cultivation, the low and unstable temperatures in early spring cannot meet the temperature requirements for sweet potato germination and seedling growth. Planting typically requires waiting for local temperatures to stabilize above 15℃ before planting can begin, delaying the planting cycle and concentrating the harvest in the mid-to-late autumn. At this time, the market supply of sweet potatoes increases significantly, easily leading to oversupply and low purchase prices, thus reducing the economic benefits for growers.

[0003] In some areas, mulching technology has been adopted, which involves covering the soil surface with plastic film to increase soil temperature and retain moisture. However, existing mulching technology can only keep the soil warm. The film still needs to be broken during sowing, leaving the leaves of the sweet potato seedlings exposed to the air, which affects the heat retention effect. If the sweet potato seedlings are covered as well, the limited space under the film can easily cause leaf damage. Furthermore, the leaves of the sweet potato seedlings are in close contact with the film, which can still affect the seedlings when the temperature fluctuates. Summary of the Invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a heat-insulating sweet potato mulching planting method and equipment, which can create a stable temperature and humidity growth environment for sweet potato seedlings, allowing the planting time to be advanced and generating better economic benefits.

[0005] The specific technical solution adopted in this invention is as follows:

[0006] A heat-insulating sweet potato mulching planting method includes the following steps:

[0007] S1. Ridging: ridges are set up in pairs, and furrows are formed between adjacent ridges;

[0008] S2. Lay a bottom film in the furrow, with the sides of the bottom film extending to the top of the ridge.

[0009] S3. Plant sweet potato seedlings on the bare soil at the top of the ridge. The roots of the sweet potato seedlings are located at the top of the ridge, and the tips of the seedlings hang over one side of the furrow and extend into the furrow.

[0010] S4. Cover the top of the ridge with soil to bury the roots of the sweet potato seedlings;

[0011] S5. Lay the top film, which covers the two adjacent rows. The top film covers the upper part of the furrow in a shed-like shape. The edge of the top film extends to the outer side of the row and is covered with soil and pressed down to fix it. The bottom film and the top film form a heat-insulating cavity for the growth of sweet potato seedlings in the furrow.

[0012] S6. Once the ambient temperature reaches the required level, tear the top film at the furrow position to allow the sweet potato seedlings to grow outdoors.

[0013] The top of the ridge is also covered with drip irrigation tape, which is laid after the sweet potato seedlings are planted in step S3 or after the sweet potato seedlings are covered with soil in step S4 and buried under the top film.

[0014] The bottom membrane consists of two membrane sheets, which are placed on the left and right sidewalls of the furrow respectively. The two membrane sheets are separated at the joint at the bottom of the furrow to form water seepage pores.

[0015] The bottom membrane is a complete membrane sheet, with the left and right sides of the complete membrane sheet placed on the left and right sidewalls of the furrow respectively. The complete membrane sheet forms water permeability pores at the bottom of the furrow by means of openings.

[0016] Before tearing the top film in step S6, soil is covered on the top of the ridges on both sides of the furrow. After tearing the top film, the soil covering the top film is used to press down the edges of the newly formed film.

[0017] An apparatus, towed by a tractor, includes a frame and, arranged sequentially from front to back on the frame, a rotary tillage and ridging mechanism, a bottom film laying mechanism, a seeding mechanism, a soil covering mechanism, and a top film laying mechanism. The ridging mechanism includes a rotary tillage shaft and a ridging scraper arranged behind the rotary tillage shaft. The ridging scraper has two ridging openings for shaping the ridges. The bottom film laying mechanism includes a first film roller rotatably mounted on the frame, a ridge top pressing wheel located at the top of the ridge, and a ridge furrow pressing wheel located in the furrow.

[0018] The furrow press roller is elastically connected to the frame via a pressing rod. The pressing rod includes a fixed base fixedly connected to the frame and a movable arm hinged to the end of the fixed base. The furrow press roller is hinged to the movable arm via a wheel assembly connecting rod. Two sets of movable arms are provided. The movable arm, wheel assembly connecting rod, and fixed base are hinged to form a parallelogram mechanism. An elastic component is also provided between the movable arm and the fixed base. The movable arm drives the furrow press roller to press down via the elastic component.

[0019] The elastic component includes a bolt connecting rod, a hinge seat, and a spring. The hinge seat is hinged to the fixed seat. The hinge seat is provided with a sliding groove, and a bolt seat is slidably disposed in the sliding groove. The hinge seat is also provided with a limit seat. The spring is clamped between the limit seat and the bolt seat. One end of the bolt connecting rod is hinged to the movable arm by means of a rotating sleeve, and the other end is provided with an external thread and forms an adjustable threaded connection with the threaded hole provided on the bolt seat.

[0020] The seedling planting mechanism includes a seedling conveyor belt and a seedling platform. The frame is also equipped with a seat for personnel to sit on. The seedling conveyor belt is located on one side of the seat. Positioning trays for placing sweet potato seedlings are evenly spaced on the seedling conveyor belt. The soil covering mechanism is located on the left and right sides of the frame, including a soil-lifting shovel and a soil-lifting conveyor belt behind the soil-lifting shovel. The end of the soil-lifting conveyor belt is connected to a slope. Soil is scooped up by the soil-lifting shovel and sent into the soil-lifting conveyor belt and then transported to the slope. The slope slides the soil to the top of the ridge and buries the sweet potato seedlings.

[0021] Alternatively, the seedling sowing mechanism includes a seedling release roller, which rotates in conjunction with the frame. The sweet potato seedlings are pre-tied or glued together with fixed strips to form ladder-shaped, equally spaced seedling rolls. The seedling rolls are laid on the ridges by the advance of the seedling release roller along the frame.

[0022] The top film laying mechanism includes a second film roller, a soil scraper, and an auxiliary pressing roller. The second film roller is rotatably coupled with the frame. The frame is also equipped with a drip irrigation tape release roller, which is located between the output end of the top film laying mechanism and the soil covering mechanism or between the output end of the soil covering mechanism and the seedling sowing mechanism.

[0023] The beneficial effects of this invention are:

[0024] This invention uses a ridging method to form rows of two, and lays a bottom film and a top film between the rows, thereby enclosing the furrows between the two rows to form a greenhouse for the growth of sweet potato seedlings, isolating them from the external low-temperature environment. Therefore, sowing can be carried out 7-10 days earlier, resulting in an earlier harvest period, making it easier to seize the market and obtain better economic benefits. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the ridge structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the equipment part of the present invention;

[0027] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle;

[0028] Figure 4 This is a schematic diagram of the equipment of the present invention along the furrow direction;

[0029] Figure 5 for Figure 4 Enlarged schematic diagram of part B in the middle;

[0030] Figure 6 This is a schematic diagram of Example 6;

[0031] Figure 7 A schematic diagram showing the assembly of the fixing strip and the sweet potato seedling;

[0032] In the attached diagram, 101 is the furrow, 102 is the ridge top, 103 is the bottom film, 104 is the top film, 105 is the sweet potato seedling, 1 is the frame, 2 is the rotary tillage shaft, 3 is the ridge scraper, 4 is the first film roller, 5 is the ridge top press wheel, 6 is the ridge furrow press wheel, 7 is the fixed seat, 8 is the movable arm, 9 is the bolt connecting rod, 10 is the hinge seat, 11 is the spring, 12 is the sliding groove, 13 is the bolt seat, 14 is the limit seat, 15 is the rotating sleeve, 16 is the seedling conveyor belt, 17 is the seedling platform, 18 is the seat, 19 is the soil lifting shovel, 20 is the soil lifting conveyor belt, 21 is the landslide, 22 is the second film roller, 23 is the soil scraper, 24 is the auxiliary press wheel, 25 is the belt release roller, 26 is the wheel group connecting rod, 27 is the seedling release roller, and 28 is the fixed strip. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0034] Specific embodiments, such as Figure 1 As shown, this invention discloses a heat-insulating sweet potato mulching planting method, comprising the following steps:

[0035] S1. Ridging, with rows set in pairs, and furrows 101 formed between two adjacent rows;

[0036] S2. A bottom film 103 is laid in the furrow 101, and the side of the bottom film 103 extends to the top of the ridge 102 of the ridge.

[0037] S3. Plant sweet potato seedlings 105 in the bare soil at the top of the ridge 102. The roots of the sweet potato seedlings 105 are located at the top of the ridge 102, and the tips of the seedlings extend out on one side of the furrow 101 and into the furrow 101.

[0038] S4. Cover the top of the ridge with soil to bury the roots of the sweet potato seedlings at 105;

[0039] S5. Lay the top film 104, which covers the two adjacent rows. The top film 104 covers the upper part of the furrow 101 in a shed-like shape. The edge of the top film 104 extends to the outer side of the row and is covered with soil and pressed down to fix it. The bottom film 103 and the top film 104 form a heat-insulating cavity for the sweet potato seedlings 105 to grow in the furrow 101.

[0040] S6. Once the ambient temperature reaches the required level, tear the top film 104 at the furrow 101 to allow the sweet potato seedlings 105 to grow in the open.

[0041] The present invention forms a local greenhouse by sealing the furrows 101 with the top film 104 and the bottom film 103, providing the temperature environment required for the growth of sweet potato seedlings 105.

[0042] In specific embodiment 1, the ridge top 102 is also covered with drip irrigation tape. The drip irrigation tape is laid after the sweet potato seedlings 105 are planted in step S3. In this embodiment, the drip irrigation tape is placed on the sweet potato seedlings 105, so that the drip irrigation tape and the sweet potato seedlings 105 are buried together. The drip irrigation tape maintains its position better and directly replenishes water to the sweet potato seedlings 105.

[0043] In specific embodiment 2, the difference between this embodiment and embodiment 1 is that the drip irrigation tape is laid and buried under the top film 104 after the sweet potato seedlings 105 are covered with soil in step S4. At this time, the drip irrigation tape is not buried in the soil, the water flows smoothly, and after dripping, the water diffuses through the soil buried on the sweet potato seedlings 105, which can effectively wet the sweet potato seedlings 105 and improve irrigation efficiency.

[0044] In a further embodiment 3, the bottom membrane 103 consists of two membrane sheets, which are respectively placed on the left and right sidewalls of the furrow 101. The two membrane sheets are separated at the overlap at the bottom of the furrow 101 to form a water seepage pore.

[0045] In this embodiment, the bottom membrane 103 has a split structure, with two membrane sheets overlapping and pressing each other. The membrane edges at the bottom of the furrow 101 are separated, and the gaps between them form water-permeable pores for draining water from the furrow 101.

[0046] In specific embodiment 4, the difference from embodiment 3 is that the bottom film 103 in this embodiment is a complete film sheet, which makes the film sheet easy to lay. The complete film sheet is placed on the left and right side walls of the furrow 101 respectively, and the complete film sheet forms water seepage pores at the bottom of the furrow 101 by opening holes.

[0047] Furthermore, before tearing the top film 104 in step S6, soil is covered on the tops 102 of the ridges on both sides of the furrow 101. After tearing the top film 104, the soil covering the top film 104 is used to compact the edges of the newly formed film. The soil covering is located at the inner edge of the ridge. After the top film 104 is torn, the compaction of the soil covering ensures that the remaining top film 104 and bottom film 103 can still form a complete covering on the surface of the ridge, thus conserving water and moisture for the ridge.

[0048] Specific embodiment 5 discloses an equipment, such as Figure 2 and Figure 4As shown, the equipment is used to implement a heat-insulating sweet potato mulching planting method. The equipment is towed by a tractor and includes a frame 1 and a rotary tillage and ridging mechanism, a bottom film laying mechanism, a seeding mechanism, a soil covering mechanism, and a top film laying mechanism arranged sequentially from front to back on the frame 1. The ridging mechanism includes a rotary tillage shaft 2 and a ridging scraper 3 arranged behind the rotary tillage shaft 2. The ridging scraper 3 is provided with two ridging openings for shaping the ridges. The bottom film laying mechanism includes a first film roller 4 rotatably arranged on the frame 1, a ridge top pressing wheel 5 located at the ridge top 102, and a ridge furrow pressing wheel 6 located in the furrow 101.

[0049] In this embodiment, the surface soil is broken up by the rotary tiller 2 and paired ridges are formed by the ridge-raising scraper 3. Then, the bottom film laying mechanism, seedling planting mechanism, soil covering mechanism and top film laying mechanism are completed in sequence, including the laying of bottom film 103, planting of sweet potato seedlings 105, covering of sweet potato seedlings 105 with soil, and laying and compacting of top film 104.

[0050] The ridge-top pressing wheel 5 is mounted on the frame 1 and travels along the edge of the bottom film 103 located on the ridge top 102. It is used to press the edge of the bottom film 103 onto the ridge top 102 and press the ridge top 102 into a groove. This ensures that after the sweet potato seedlings 105 are planted, their tips face into the furrow 101 and soil remains in the groove, effectively burying the sweet potato seedlings 105 and preventing them from contacting the top film 104 and causing frost damage.

[0051] Furthermore, such as Figure 3 and Figure 4 , Figure 5 As shown, the furrow press roller 6 is elastically connected to the frame 1 via a pressing rod. The pressing rod includes a fixed base 7 fixedly connected to the frame 1 and a movable arm 8 hinged to the end of the fixed base 7. The furrow press roller 6 is hinged to the movable arm 8 via a wheel assembly connecting rod 26. Two sets of movable arms 8 are provided. The movable arm 8, wheel assembly connecting rod 26, and fixed base 7 are hinged to form a parallelogram mechanism. An elastic component is also provided between the movable arm 8 and the fixed base 7. The movable arm 8 drives the furrow press roller 6 to press down via the elastic component.

[0052] The furrow 101 press wheel, as described Figure 4 As shown, two sets are symmetrically arranged on the frame 1. The movable arm 8, with its quadrilateral structure, compacts the bottom membrane 103 located at the foot of the ridge slope, so that the bottom membrane 103 conforms to the undulation of the ground.

[0053] Between the two sets of furrow pressing rollers 6, there is also a perforated roller with perforated protrusions. After the perforated protrusions roll over the bottom film, they can form water-permeable pores as described in Example 4.

[0054] Furthermore, the elastic component includes a bolt connecting rod 9, a hinge seat 10, and a spring 11. The hinge seat 10 is hinged to the fixed seat 7. The hinge seat 10 is provided with a sliding groove 12, and a bolt seat 13 is slidably disposed in the sliding groove 12. The hinge seat 10 is also provided with a limit seat 14. The spring 11 is clamped between the limit seat 14 and the bolt seat 13. One end of the bolt connecting rod 9 is hinged to the movable arm 8 by means of a rotating sleeve 15, and the other end is provided with an external thread and forms an adjustable threaded connection with the threaded hole provided on the bolt seat 13.

[0055] The rotating sleeve 15 and the bolt connecting rod 9 are fitted together to form a telescopic fit. The rotating sleeve 15 is hinged to the movable arm 8. The threaded end of the bolt connecting rod 9 is connected to the hinge seat 10 through the bolt seat 13 to form an adjustable telescopic fit. The bolt seat 13 forms a downward pressure with the help of the limiting seat 14 and the spring 11. When the terrain undulates and the furrow press roller 6 undulates, the spring 11 is compressed or extended, and the bolt seat 13 moves in the sliding groove 12. At the same time, the hinge seat 10 swings relative to the fixed seat 7, so that the furrow press roller 101 can undulate in an elastic state, avoiding crushing the bottom film 103. When it is necessary to adjust the pressure, it is only necessary to rotate the bolt connecting rod 9 to make it screw out or screw in relative to the bolt seat 13.

[0056] Furthermore, such as Figure 2 As shown, the seedling planting mechanism includes a seedling conveyor belt 16 and a seedling platform 17. The frame 1 is also equipped with a seat 18 for personnel to sit on. The seedling conveyor belt 16 is located on one side of the seat 18. Positioning trays for placing sweet potato seedlings 105 are evenly spaced on the seedling conveyor belt 16. The soil covering mechanism is located on the left and right sides of the frame 1, including a soil-lifting shovel 19 and a soil-lifting conveyor belt 20 behind the soil-lifting shovel 19. The end of the soil-lifting conveyor belt 20 is connected to a slope 21. Soil is scooped up by the soil-lifting shovel 19 and sent into the soil-lifting conveyor belt 20 and transported to the slope 21. The slope 21 slides the soil to the top of the ridge 102 and buries the sweet potato seedlings 105.

[0057] The seedling platform 17 is used to store the transport box for sweet potato seedlings 105. During operation, the operator sits on the seat 18 and manually arranges the sweet potato seedlings 105 in the transport box, placing them one by one on the positioning tray of the seedling conveyor belt 16. After the positioning tray moves to the bottom with the seedling conveyor belt 16, the positioning tray tilts due to the reversal of the seedling conveyor belt 16. Under the action of gravity, the sweet potato seedlings 105 fall to the designed position on the top of the ridge 102. The soil-lifting shovel 19 is located on both sides of the frame 1 and is used to lift the soil from the ground. As the frame 1 moves forward, the subsequent soil pushes against the previously lifted soil and enters the soil-lifting conveyor belt 20. The soil-lifting conveyor belt 20 sends the soil to the landslide 21. The output position of the landslide 21 is designed at the top of the ridge 102. The falling soil buries the sweet potato seedlings 105 and forms an isolation soil layer to support the top film 104 on the top of the ridge 102.

[0058] Furthermore, such as Figure 2 As shown, the top film laying mechanism includes a second film roller 22, a soil scraper 23 and an auxiliary pressing roller 24. The second film roller 22 is rotatably coupled with the frame 1. The frame 1 is also equipped with a drip irrigation tape release roller 25, which is located between the output end of the top film laying mechanism and the soil covering mechanism or between the output end of the soil covering mechanism and the seedling sowing mechanism.

[0059] The auxiliary press wheel 24, as described Figure 4 As shown, it is hinged to the frame 1 and pressed down by its own weight. It is located at the foot of the slope on the outside of the ridge and is used to compact the edge of the top film 104. A scraper 23 is set in front of the auxiliary compaction wheel 24 to push the surrounding soil to the edge of the top film 104 for easy compaction. The soil lifting shovel 19 is set in front of the track of the compaction wheel. The soil lifting shovel 19 digs a groove at the foot of the ridge so that the edge of the top film 104 can be placed in the groove. This makes it easier for the scraper 23 to scoop up more soil and press it on the edge of the top film 104 located in the groove, thereby improving the fixing effect of the top film 104.

[0060] Specific embodiment 6, this embodiment for example Figure 7 As shown, sweet potato seedlings 105 are pre-tied or glued together using fixing strips 28 to form ladder-shaped, equally spaced seedling rolls. These seedling rolls are secured using... Figure 6 The seedling roller 27 shown is laid on the ridge as it moves forward along with the frame 1.

[0061] In this embodiment, seedling rolls are pre-made, eliminating the need for additional personnel during sowing and enabling highly efficient sowing. Furthermore, the spacing between seedlings during sowing is precisely guaranteed, improving land utilization and contributing to increased sweet potato yield.

Claims

1. A method for heat-insulating sweet potato mulching cultivation, characterized in that: Including the following methods: S1. Ridging, with rows set in pairs, and furrows (101) formed between two adjacent rows; S2. A base film (103) is laid in the furrow (101), and the side of the base film (103) extends to the top of the ridge (102); S3. Plant sweet potato seedlings (105) on the bare soil at the top of the ridge (102). The roots of the sweet potato seedlings (105) are located at the top of the ridge (102), and the tips of the seedlings extend to one side of the furrow (101) and into the furrow (101). S4. Cover the top of the ridge (102) with soil to bury the roots of the sweet potato seedlings (105); S5. Lay the top film (104), which covers the two adjacent rows. The top film (104) covers the upper part of the furrow (101) in a shed-like shape. The edge of the top film (104) extends to the outer side of the row and is covered with soil and fixed. The bottom film (103) and the top film (104) form a heat-insulating cavity for the sweet potato seedlings (105) to grow in the furrow (101). S6. After the ambient temperature reaches the standard, tear the top film (104) at the furrow (101) so that the sweet potato seedlings (105) can grow in the open air.

2. The heat-insulating sweet potato mulching planting method according to claim 1, characterized in that: The ridge top (102) is also covered with drip irrigation tape, which is laid after the sweet potato seedlings (105) are planted in step S3 or after the sweet potato seedlings (105) are covered with soil in step S4 and buried under the top film (104).

3. The heat-insulating sweet potato mulching planting method according to claim 1, characterized in that: The bottom membrane (103) consists of two membrane sheets, which are respectively placed on the left and right side walls of the furrow (101). The two membrane sheets are separated at the bottom of the furrow (101) to form water seepage pores.

4. The heat-insulating sweet potato mulching planting method according to claim 1, characterized in that: The bottom membrane (103) is a complete membrane sheet. The left and right sides of the complete membrane sheet are respectively placed on the left and right side walls of the furrow (101). The complete membrane sheet forms water seepage pores at the bottom of the furrow (101) through an opening method.

5. The heat-insulating sweet potato mulching planting method according to claim 1, characterized in that: Before tearing the top film (104) in step S6, soil is covered on the top of the ridge (102) on both sides of the furrow (101). After tearing the top film (104), the soil covering the top film (104) is used to press down the edge of the newly formed film.

6. An apparatus for carrying out the method of claim 1, characterized in that: The equipment is towed by a tractor and includes a frame (1) and a rotary tillage and ridging mechanism, a bottom film laying mechanism, a seeding mechanism, a soil covering mechanism and a top film laying mechanism arranged sequentially from front to back on the frame (1). The ridging mechanism includes a rotary tillage shaft (2) and a ridging scraper (3) arranged on the rear side of the rotary tillage shaft (2). The ridging scraper (3) is provided with two ridging openings for shaping the ridges. The bottom film laying mechanism includes a first film roller (4) rotatably arranged on the frame (1), a ridge top pressing wheel (5) located on the ridge top (102) and a ridge furrow pressing wheel (6) located in the furrow (101).

7. The equipment according to claim 6, characterized in that: The furrow press roller (6) is elastically connected to the frame (1) by means of a press rod. The press rod includes a fixed seat (7) fixedly connected to the frame (1) and a movable arm (8) hinged at the end of the fixed seat (7). The furrow press roller (6) is hinged to the movable arm (8) by means of a wheel set connecting rod (26). Two sets of movable arms (8) are provided. The movable arm (8), the wheel set connecting rod (26) and the fixed seat (7) are hinged to form a parallelogram mechanism. An elastic component is also provided between the movable arm (8) and the fixed seat (7). The movable arm (8) drives the furrow press roller (6) to press down by means of the elastic component.

8. The equipment according to claim 7, characterized in that: The elastic component includes a bolt connecting rod (9), a hinge seat (10), and a spring (11). The hinge seat (10) is hinged to the fixed seat (7). The hinge seat (10) is provided with a sliding groove (12). A bolt seat (13) is slidably disposed in the sliding groove (12). The hinge seat (10) is also provided with a limit seat (14). The spring (11) is clamped between the limit seat (14) and the bolt seat (13). One end of the bolt connecting rod (9) is hinged to the movable arm (8) by means of a rotating sleeve (15). The other end is provided with an external thread and forms an adjustable threaded connection with the threaded hole provided on the bolt seat (13).

9. The equipment according to claim 6, characterized in that: The seedling sowing mechanism includes a seedling release roller (27), which rotates in conjunction with the frame (1). The sweet potato seedlings (105) are pre-tied or glued together by means of a fixing strip (28) to form a ladder-shaped seedling roll with equal intervals. The seedling roll is laid on the ridge by means of the random frame (1) of the seedling release roller (27).

10. The equipment according to claim 6, characterized in that: The top film laying mechanism includes a second film roller (22), a soil scraper (23), and an auxiliary pressing roller (24). The second film roller (22) is rotatably coupled with the frame (1). The frame (1) is also equipped with a drip irrigation tape release roller (25). The release roller (25) is located between the top film laying mechanism and the soil covering mechanism or between the soil covering mechanism and the seedling sowing mechanism.

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