Irrigation device for improving shallow water level saline-alkali soil

Abstract

The utility model provides an irrigation device for improving shallow-water-level saline-alkali soil, which comprises an evaporation ditch and an agricultural film covered above the evaporation ditch. The supporting component is located between the evaporation ditch and the agricultural film and used for supporting the agricultural film; the collecting grooves are formed in the two sides of the evaporation ditch, and the two ends of the agricultural film and the two ends of the supporting component extend into the collecting grooves correspondingly; the fixing assembly is located in the collecting groove and comprises a first fixing piece and a second fixing piece, the first fixing piece is used for fixing the agricultural film, and the second fixing piece is used for fixing the supporting component; under the action of sunlight, underground water in the evaporation ditch is vaporized and condensed on the agricultural film to form water drops, the water drops flow into the collecting tank along the agricultural film, and low-salinity water collected in the collecting tank is conveyed to the saline-alkali soil through the connected irrigation assembly. The irrigation device for improving the shallow-water-level saline-alkali soil solves the technical problems that in the prior art, operation is tedious, cost is high, and the irrigation device is not suitable for improvement of large-area saline-alkali soil.

Description

Technical Field

[0001] The utility model relates to the technical field of saline-alkali land improvement, in particular to an irrigation device for improving shallow water level saline-alkali land. Background Art

[0002] my country's saline-alkali lands are widespread, particularly in the Hetao Irrigation Area, the Songnen Plain in northeastern China, the Sanjiang Plain, and the southeastern coastal areas. Northeast China alone boasts approximately 3.1973 million hectares of saline-alkali land. These areas generally have high groundwater levels, leading to intense evaporation that causes large amounts of water, carrying salt ions, to migrate upward. After evaporation, these ions remain in the surface soil, leading to salt accumulation. Over time, this formation of saline-alkali land severely impacts crop growth and yields, hindering the sustainable development of agriculture and the economy.

[0003] To address this issue, the current method for improving saline-alkali land is mostly through flooding and evaporation. The basic principle of this method is to first irrigate the saline-alkali land to dissolve the salt in the soil and form saline-alkali water. The saline-alkali water is then collected and heated to evaporate the water. The evaporated water vapor is then collected, and the salt gradually crystallizes during the evaporation process, extracting the saline-alkali components from the saline-alkali soil and improving the soil.

[0004] However, existing methods involve a large amount of equipment, especially during the heating, evaporation, collection, and reuse processes, which requires a lot of equipment and energy, resulting in high costs. Furthermore, the collected saline water undergoes multiple treatments, and the heating and evaporation steps are cumbersome, making it unsuitable for large-scale saline-alkali land improvement.

[0005] Therefore, the prior art needs to be further developed. Utility Model Content

[0006] The purpose of the utility model is to overcome the above technical deficiencies and provide an irrigation device for improving shallow water saline-alkali land, so as to solve the technical problems in the related technology of complicated operation, high cost and unsuitability for improving large-scale saline-alkali land.

[0007] To achieve the above technical objectives, the present invention adopts the following technical solutions: an irrigation device for improving shallow water level saline-alkali land is provided, comprising: an evaporation ditch, which is opened in the saline-alkali land and is used for evaporating groundwater; an agricultural film, which is covered on the top of the evaporation ditch and is used for promoting condensation of water in the evaporation ditch; a supporting component, which is located between the evaporation ditch and the agricultural film and is used for supporting the agricultural film; a collecting trough, which is arranged on both sides of the evaporation ditch, and the two ends of the agricultural film and the supporting component extend into the collecting trough respectively; a fixing component, which is located in the collecting trough and comprises a first fixing component and a second fixing component, the first fixing component is used for fixing the agricultural film, and the second fixing component is used for fixing the supporting component; under the action of sunlight, the groundwater in the evaporation ditch vaporizes and condenses on the agricultural film to form water droplets, which flow along the agricultural film into the collecting trough, and the low-salinity water collected in the collecting trough is transported to the saline-alkali land through the connected irrigation component.

[0008] Furthermore, the supporting component includes a plurality of inner supporting rib groups, which are arranged at intervals along the length direction of the evaporation ditch, and the two ends of each inner supporting rib group are respectively fixed in the collecting grooves on both sides of the evaporation ditch.

[0009] Furthermore, the internal supporting rib group includes two internal supporting ribs, which are connected to each other and form an angle between them. The two ends of the two internal supporting ribs away from the connection are respectively located in each collecting groove.

[0010] Furthermore, the included angle is a right angle.

[0011] Furthermore, a card plate is provided in the collection tank, which is located on the side of the collection tank away from the evaporation ditch. One end of the card plate is connected to the inner wall of the collection tank, and the other end of the card plate extends toward the center of the collection tank. The card plate is arranged horizontally; the first fixing member is a pressure strip, and the edge of the agricultural film is curled along the inner wall of the collection tank and is pressed against the card plate by the pressure strip.

[0012] Furthermore, the second fixing part is a support plate, which is arranged perpendicular to the card plate, so that a first groove is formed between the inner wall of the collecting trough and the support plate, and a second groove is formed between the side of the support plate away from the first groove and the card plate. The agricultural film and the pressure strip are both located in the first groove, and the end of the support component is located in the second groove. The intersection of the support plate and the card plate forms a support angle, which is used to support and fix the support component.

[0013] Furthermore, the irrigation component includes: an irrigation pipe, which is laid in the saline-alkali land; an underground box, which is connected to the collection tank, and the water in the collection tank is collected in the underground box; a first water pump, which is installed in the underground box, and the first water pump pumps the water in the underground box out and irrigates the saline-alkali land through the irrigation pipe.

[0014] Furthermore, the irrigation component also includes: a water tank, which is respectively connected to the buried boxes on both sides of the collection tank, and the water tank is connected to the irrigation pipe; a second water pump, the water tank is equipped with a second water pump, the water in the buried box is collected in the water tank, and the second water pump pumps the water in the water tank into the irrigation pipe.

[0015] Furthermore, the irrigation component also includes: a first liquid level sensor, the first liquid level sensor is located in the buried box, and the first liquid level sensor is connected to the first water pump signal; a second liquid level sensor, the second liquid level sensor is located in the water tank, and the second liquid level sensor is connected to the second water pump signal.

[0016] Furthermore, the evaporation ditch is a V-shaped structure, and the collecting trough is a U-shaped structure.

[0017] Beneficial effects:

[0018] 1. The irrigation device of the utility model adopts a combination design of evaporation ditch and agricultural film, which reduces the complex equipment and tedious operation procedures in the traditional method of improving saline-alkali land, making the irrigation process simpler and more efficient.

[0019] 2. The irrigation device of the utility model relies on the principles of natural evaporation and condensation to collect water, which reduces the demand for energy and the complexity of the equipment, thereby significantly reducing the overall cost of saline-alkali land improvement and is suitable for large-scale promotion.

[0020] 3. The irrigation device of the utility model is designed with a collection trough, a card plate and a layering strip. The device can efficiently collect water droplets generated in the evaporation ditch, ensure the timely collection of low-salinity water sources, and provide a stable water source for irrigation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram from one perspective of an irrigation device for improving shallow water saline-alkali land used in an embodiment of the present utility model;

[0022] Figure 2 It is a structural schematic diagram from another perspective of the irrigation device for improving shallow water saline-alkali land adopted in an embodiment of the present invention.

[0023] The above drawings include the following reference numerals:

[0024] 1. Evaporation ditch; 2. Agricultural film; 3. Support component; 31. Internal support rib group; 311. Internal support rib; 4. Collecting trough; 41. Card plate; 42. First groove; 43. Second groove; 5. Fixing assembly; 51. First fixing part; 511. Pressing strip; 52. Second fixing part; 521. Support plate; 6. Irrigation assembly; 61. Irrigation pipe; 611. Main pipe; 612. Drip irrigation capillary tube; 62. Underground box; 63. First water pump; 64. Water storage tank; 65. Second water pump; 66. First liquid level sensor; 67. Second liquid level sensor; 7. Water retaining dam. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0026] According to an embodiment of the present invention, an irrigation device for improving shallow saline-alkali land is provided. Figure 1 and Figure 2 , including: an evaporation ditch 1, which is opened in the saline-alkali land and is used to evaporate groundwater; an agricultural film 2, which covers the top of the evaporation ditch 1 and is used to promote condensation of water in the evaporation ditch 1; a supporting component 3, which is located between the evaporation ditch 1 and the agricultural film 2 and is used to support the agricultural film 2; a collecting trough 4, which is arranged on both sides of the evaporation ditch 1, and the two ends of the agricultural film 2 and the supporting component 3 extend into the collecting trough 4 respectively; a fixing component 5, which is located in the collecting trough 4, including a first fixing component 51 and a second fixing component 52, the first fixing component 51 is used to fix the agricultural film 2, and the second fixing component 52 is used to fix the supporting component 3; under the action of sunlight, the groundwater in the evaporation ditch 1 vaporizes and condenses on the agricultural film 2 to form water droplets, and the water droplets flow along the agricultural film 2 to the collecting trough 4, and the low-salinity water collected in the collecting trough 4 is transported to the saline-alkali land through the connected irrigation component 6.

[0027] See Figure 1In this embodiment of the irrigation device for improving shallow saline-alkali land, the support component 3 is designed to ensure the stability of the agricultural film 2 and reduce the impact of external forces such as wind on the film. The fixing assembly 5 is used to secure and support the agricultural film 2 and the supporting component 3. As sunlight intensity increases, moisture in the soil within the evaporation ditch 1 evaporates and condenses on the agricultural film 2, forming water droplets. These droplets flow along the film 2 into the collection trough 4. Water in the collection trough 4 is collected and passed through the irrigation assembly 6 to irrigate the saline-alkali land. Salt-tolerant crops are planted in the fields. Through long-term irrigation and the growth of salt-tolerant plants, salt is concentrated in the soil, reducing its salt content and achieving the goal of improving saline-alkali land. Furthermore, the irrigation device can be used for a long time, preventing the re-salinization of the improved soil. The design of the evaporation ditch 1 utilizes natural evaporation and condensation to collect water, reducing reliance on high-cost equipment and thus lowering the overall improvement cost. Furthermore, by utilizing natural resources (such as sunlight and groundwater) for water evaporation and condensation, the need for chemical fertilizers and other artificial improvement methods is reduced, meeting the requirements of sustainable development. The irrigation device for improving shallow water saline-alkali land of this embodiment solves the technical problems in the related art of complicated operation, high cost and unsuitability for improving large-scale saline-alkali land.

[0028] See Figure 1 In this embodiment of the irrigation device for improving shallow saline-alkali land, the support component 3 includes multiple internal support rib groups 31 spaced apart along the length of the evaporation ditch 1. The two ends of each internal support rib group 31 are fixed to the collection troughs 4 on either side of the evaporation ditch 1. The internal support rib groups 31 provide additional support, ensuring that the agricultural film 2 does not sag or tear under wind or other external forces, thereby maintaining the overall structural stability of the evaporation ditch 1. The simple structural design of the internal support rib groups 31 facilitates quick installation and removal, reducing the complexity of the operation for workers. The design of the multiple internal support rib groups 31 can be flexibly adjusted according to the specific terrain and agricultural film size, adapting to saline-alkali land of different sizes and shapes.

[0029] See Figure 1 In this embodiment of the irrigation device for improving shallow saline-alkali land, the internal support rib assembly 31 includes two internal support ribs 311, which are connected to each other and form an angle between them. The ends of the two internal support ribs 311, distal from the connection, are located within each collection trough 4. This angle helps form a slope, promoting evaporation and condensation of water within the evaporation trench. This angle allows water droplets on the agricultural film 2 to flow more efficiently toward the collection trough 4, improving water collection efficiency.

[0030] See Figure 1The irrigation device for improving shallow saline-alkali land in this embodiment has a right angle. The right angle between the two inner support ribs 311 creates a steeper slope, which helps water droplets on the surface of the film 2 quickly flow downward along the film after condensation. If the angle is too large, the surface inclination of the film 2 decreases, and the condensed water droplets may not slide smoothly downward, but instead remain on the film. This causes the droplets to accumulate on the film and even re-evaporate, resulting in water waste and reduced water collection efficiency. A design with an excessively small angle makes the inner support ribs 311 susceptible to deformation or bending when subjected to pressure from the film 2 and the external environment (such as wind pressure), causing the film 2 to lose support. The right angle design of the inner support ribs 311 prevents water droplets from accumulating on the surface of the film 2, reduces re-evaporation of water vapor, and ensures that evaporated water is effectively collected in the collection tank 4.

[0031] See Figure 1 In this embodiment of the irrigation device for improving shallow saline-alkali land, a clip 41 is installed within the collection trough 4. The clip 41 is located on the side of the collection trough 4 away from the evaporation ditch 1. One end of the clip 41 is connected to the inner wall of the collection trough 4, and the other end extends toward the center of the collection trough 4. The clip 41 is arranged horizontally. The first fixing member 51 is a pressure strip 511. The edge of the agricultural film 2 is curled along the inner wall of the collection trough 4 and pressed against the clip 41 by the pressure strip 511. The clip 41 is located on the side of the collection trough 4 away from the evaporation ditch 1 and effectively guides condensed water droplets within the evaporation ditch 1 to the center of the collection trough 4, ensuring centralized water collection. By curling and pressing the edge of the agricultural film 2 against the clip 41, the clip 41 effectively secures the film 2 and prevents it from being blown away by the wind.

[0032] See Figure 1 In this embodiment of the irrigation device for improving shallow saline-alkali land, the second fixing member 52 is a support plate 521. The support plate 521 is arranged perpendicular to the clamping plate 41, thereby forming a first groove 42 between the inner wall of the collection trough 4 and the support plate 521. A second groove 43 is formed between the side of the support plate 521 away from the first groove 42 and the clamping plate 41. The agricultural film 2 and the pressure strip 511 are both located in the first groove 42, and the end of the support component 3 is located in the second groove 43. The intersection of the support plate 521 and the clamping plate 41 forms a support angle, which is used to support and fix the support component 3, thereby increasing the rigidity of the overall structure. The support plate 521 is arranged perpendicular to the clamping plate 41, forming the first groove 42 between the inner wall of the collection trough 4 and the support plate 521, providing a stable support structure that can effectively support the agricultural film 2.

[0033] See Figure 2The irrigation device for improving shallow water level saline-alkali land in this embodiment includes an irrigation component 6 including an irrigation pipe 61, which is laid in the saline-alkali land; an underground box 62, which is connected to the collection tank 4, and the water in the collection tank 4 is collected in the underground box 62; a first water pump 63, which is installed in the underground box 62, and the first water pump 63 pumps water out of the underground box 62 and irrigates the saline-alkali land through the irrigation pipe 61, thereby realizing automatic water extraction and irrigation, reducing the need for manual intervention, and reducing labor intensity.

[0034] See Figure 2 In this embodiment, the irrigation device for improving shallow saline-alkali land includes an irrigation assembly 6 that further includes a water tank 64 connected to underground tanks 62 on either side of the collection trough 4. The water tanks 64 are connected to the irrigation pipe 61 and a second water pump 65 installed in the water tank 64. The water in the underground tanks 62 is collected in the water tank 64, and the second water pump 65 pumps the water in the water tank 64 into the irrigation pipe 61. The provision of the water tank 64 enables the device to store large amounts of water when it collects, thereby ensuring sufficient water for crops even in drought or insufficient rainfall.

[0035] See Figure 2 In this embodiment, the irrigation device for improving shallow saline-alkali land includes an irrigation assembly 6 that further includes a first liquid level sensor 66, located within an underground tank 62 and connected to a first water pump 63; and a second liquid level sensor 67, located within a water storage tank 64 and connected to a second water pump 65. By accurately monitoring the water level, the sensors effectively prevent droughts caused by low water levels or overflows caused by high water levels. The real-time monitoring system allows managers to easily monitor water level changes and adjust irrigation strategies promptly, streamlining management and maintenance.

[0036] See Figure 1 and Figure 2 In this embodiment of the irrigation device for improving shallow saline-alkali land, the evaporation ditch 1 has a V-shaped structure, and the collection trough 4 has a U-shaped structure. The V-shaped evaporation ditch 1 effectively increases the contact area between the wet ground surface and the air, enhancing the evaporation rate, thereby improving the evaporation efficiency of groundwater and promoting the conversion of more water into water vapor. The U-shaped trough helps reduce water leakage during flow.

[0037] The irrigation device for improving shallow saline-alkali land of this embodiment is used in the following steps:

[0038] (1) Excavation of evaporation ditches. Excavate evaporation ditches 1 in saline-alkali land at regular intervals. The depth of the evaporation ditches 1 is between 0.5 and 1.5 meters. The construction depth is required to be at the depth where the groundwater level is initially visible or moist soil is visible at the bottom of the evaporation ditch. The evaporation ditch 1 is about one meter wide and can be constructed in a U-shaped or V-shaped shape. The side walls of the ditch are compacted to prevent collapse. The top is flush with the field. One meter is reserved on each side to build an earthen retaining dam 7. The outer side of the retaining dam 7 is connected to the irrigation and drainage ditch. When water accumulates on rainy days, the retaining dam 7 is shoveled open to drain water. When salt accumulates inside the evaporation ditch 1, the evaporation ditch can also be flushed to flush the surface salt particles into the drainage ditch for drainage. When not in use, the soil of the retaining dam 7 can be shoveled back and compacted.

[0039] (2) Covering with agricultural film. After the evaporation ditch is excavated, a collection trough 4 is buried 20 cm from the edge of the evaporation ditch 1 on both sides. The collection trough 4 is U-shaped. The U-shaped trough is the same length as the evaporation ditch 1 and the width of the U-shaped trough is 50 mm. There are a first groove 42 and a second groove 43 on the inside. The first groove 42 has a layering strip 511, and the second groove 43 has no layering strip. The U-shaped trough is laid on both sides of the evaporation ditch 1, and the top end is flush with the field. The U-shaped trough can be made of PVC, and the U-shaped trough layering strip 511 can be made of PE. Install the inner support bar 311 on the constructed U-shaped trough. The bottom of the inner support bar 311 is stuck in the second groove 43. The inner support bar 311 is stuck at the intersection of the support plate 521 and the clamping plate 41. The inner support bar 311 is installed at intervals according to needs. The material of the inner support bar 311 can be iron or bamboo. The angle between the two inner support bars is 90°. The bottom width is 1 m, the height is about 50 cm, and the two sides are about 70 cm long. Apply the agricultural film 2 over the installed internal support ribs 311. The film 2 should be approximately 150 mm wide, leaving approximately 5 cm of excess material on either side. Tighten the film 2 and press the excess material into the first groove 42 using the pressure strips 511. This completes the application of the film 2. The film 2 can be made of PVC or PE, depending on the site conditions. The film must be light-transmitting, heat-insulating, and resistant to aging. The excess material of the film 2 should be compacted with soil on the retaining dam to cover the entire evaporation ditch 1 and prevent moisture leakage.

[0040] (3) Connect the underground box. Install the underground box 62 on the side of the evaporation ditch 1 close to the irrigation and drainage ditch. The underground box 62 is buried underground with the box opening facing the U-shaped groove. The first liquid level sensor 66 is installed inside the underground box 62, and the first water pump 63 is placed at the bottom. The material of the buried box 62 can be PE, with a volume of 0.5m 3 The first liquid level sensor 66 is installed on the top of the buried box 62, and sends a signal when the water level reaches a preset value, and the first water pump 63 at the bottom starts working.

[0041] (4) Connect the water tank. Install a water tank 64 near the underground box 62. The water tank 64 is connected to the inside of the underground box 62 through a hose. Each water tank 64 can be connected to four underground boxes 62. A second liquid level sensor 67 is installed inside the water tank 64. When the water level reaches the preset value, a signal is sent, and the second water pump 65 installed at the bottom of the water tank 64 starts to pump out the water. The material of the water tank 64 can be PE material, with a volume of 2.5m 3 About 62, slightly larger than the volume of 4 underground boxes.

[0042] (5) Connect the irrigation pipes. The irrigation pipe 61 consists of a main pipe 611 and a drip irrigation capillary pipe 612. The main pipe 611 is laid between the two evaporation ditches 1 and is connected to the second water pump 65 of the water storage tank 64. The main pipe 611 can be made of PVC or PE, with a diameter of DN50. The length of the main pipe is determined according to the length of the field. The drip irrigation capillary pipe 612 is connected to the main pipe 611 and laid in the field. The drip irrigation capillary pipe 612 can be made of DN16 PVC pipe with a drip hole spacing of 0.5m. The length of the capillary pipe is determined according to the width of the field.

[0043] (6) Planting crops. Select crops based on the conditions of the field. If the field has a high salinity and is not suitable for growing cash crops, choose salt-tolerant plants such as Suaeda salsa and Phragmites australis. After reducing the salinity through drip irrigation and planting salt-tolerant plants, choose to plant soil-improving crops such as alfalfa. After they mature, return them to the field directly to increase soil fertility and improve the quality of the field.

[0044] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0045] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0046] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0047] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0048] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An irrigation device for improving shallow water level saline-alkali land, characterized in that: include: Evaporation ditch (1), opened in saline-alkali land, used to evaporate groundwater; An agricultural film (2), the agricultural film (2) covering the top of the evaporation ditch (1) and used to promote condensation of water in the evaporation ditch (1); A supporting component (3), the supporting component (3) being located between the evaporation ditch (1) and the agricultural film (2) and being used to support the agricultural film (2); A collecting trough (4), the collecting trough (4) being arranged on both sides of the evaporation ditch (1), and both ends of the agricultural film (2) and the supporting component (3) respectively extending into the collecting trough (4); A fixing assembly (5), the fixing assembly (5) is located in the collecting trough (4), and includes a first fixing member (51) and a second fixing member (52), the first fixing member (51) being used to fix the agricultural film (2), and the second fixing member (52) being used to fix the supporting member (3); under the action of sunlight, the groundwater in the evaporation ditch (1) vaporizes and condenses on the agricultural film (2) to form water droplets, which flow along the agricultural film (2) into the collecting trough (4), and the low-salinity water collected in the collecting trough (4) is transported to the saline-alkali land through the connected irrigation assembly (6).

2. The irrigation device for improving shallow water level saline-alkali land according to claim 1, characterized in that: The supporting component (3) comprises a plurality of internal support rib groups (31), wherein the plurality of internal support rib groups (31) are arranged at intervals along the length direction of the evaporation groove (1), and the two ends of each internal support rib group (31) are respectively fixed in the collecting grooves (4) on both sides of the evaporation groove (1).

3. The irrigation device for improving shallow water level saline-alkali land according to claim 2, characterized in that: The internal support rib group (31) comprises two internal support ribs (311), the two internal support ribs (311) are connected to each other and form an angle therebetween, and the two ends of the two internal support ribs (311) away from the connection are respectively located in each of the collecting grooves (4).

4. The irrigation device for improving shallow water level saline-alkali land according to claim 3, characterized in that: The included angle is a right angle.

5. The irrigation device for improving shallow water level saline-alkali land according to claim 1, characterized in that: A card plate (41) is provided in the collecting trough (4), the card plate (41) being located on a side of the collecting trough (4) away from the evaporation groove (1), one end of the card plate (41) being connected to the inner wall of the collecting trough (4), and the other end of the card plate (41) extending toward the center of the collecting trough (4), and the card plate (41) being arranged horizontally; The first fixing member (51) is a pressure strip (511), and the edge of the agricultural film (2) is curled along the inner wall of the collecting trough (4) and is pressed against the clamping plate (41) by the pressure strip (511).

6. The irrigation device for improving shallow water level saline-alkali land according to claim 5, characterized in that: The second fixing member (52) is a support plate (521), and the support plate (521) is arranged perpendicular to the card plate (41), so that a first groove (42) is formed between the inner wall of the collecting tank (4) and the support plate (521), and a second groove (43) is formed between the side of the support plate (521) away from the first groove (42) and the card plate (41). The agricultural film (2) and the pressure strip (511) are both located in the first groove (42), and the end of the support component (3) is located in the second groove (43). The intersection of the support plate (521) and the card plate (41) forms a support angle for supporting and fixing the support component (3).

7. The irrigation device for improving shallow saline-alkali land according to claim 1, characterized in that: The irrigation assembly (6) comprises: An irrigation pipe (61), wherein the irrigation pipe (61) is laid in saline-alkali land; An underground box (62), the underground box (62) is connected to the collecting trough (4), and the water in the collecting trough (4) is collected in the underground box (62); A first water pump (63) is installed in the buried box (62), and the first water pump (63) pumps water out of the buried box (62) and irrigates the saline-alkali land through the irrigation pipe (61).

8. The irrigation device for improving shallow saline-alkali land according to claim 7, characterized in that: The irrigation assembly (6) further comprises: A water storage tank (64), the water storage tank (64) is respectively connected to the buried boxes (62) on both sides of the collection tank (4), and the water storage tank (64) is connected to the irrigation pipe (61): A second water pump (65) is installed in the water storage tank (64). Water in the buried box (62) is collected in the water storage tank (64). The second water pump (65) pumps the water in the water storage tank (64) into the irrigation pipe (61).

9. The irrigation device for improving shallow saline-alkali land according to claim 8, characterized in that: The irrigation assembly (6) further comprises: a first liquid level sensor (66), the first liquid level sensor (66) being located in the buried box (62), and the first liquid level sensor (66) being signal-connected to the first water pump (63); A second liquid level sensor (67), the second liquid level sensor (67) is located in the water storage tank (64), and the second liquid level sensor (67) is signal-connected to the second water pump (65).

10. The irrigation device for improving shallow saline-alkali land according to claim 1, characterized in that: The evaporation ditch (1) is a V-shaped structure, and the collecting trough (4) is a U-shaped structure.

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