Saline-alkali soil integrated straw powder deep returning equipment and permeation and recarburization improvement method

Abstract

The invention provides a saline-alkali soil integrated straw powder deep returning device and a permeation and recarburization improvement method, and belongs to the technical field of saline-alkali soil improvement. A punching part, a compacting part, a feeding part and a soil covering part are sequentially arranged in the equipment, and the method for implementing permeation and recarburization improvement of the saline-alkali soil by adopting the structure comprises the specific steps that S1, straw powder is processed; s2, land of the saline soil improvement area is leveled; s3, drilling holes in the salinized soil; s4, after drilling is completed, straw powder is placed in a feeding hole channel and compacted; s5, covering the straw powder and the feeding hole channels with soil for burying; s6, leaching the salinized soil by utilizing irrigation water or rainwater; and S7, after the set expected time is reached, the steps are repeated. The application of the straw powder enhances the water and salt infiltration capacity of the soil and improves the fertility improvement and carbon sequestration capacity of the soil, so that five-dimensional synergy of permeation enhancement, fertilizer retention, carbon sequestration, yield increase and ecology is realized, and an efficient and green solution path is provided for ecological improvement and agricultural sustainable development of the saline-alkali soil.

Description

Technical Field

[0001] The present invention relates to the technical field of saline-alkali land improvement, and in particular to saline-alkali land integrated straw powder deep-layer field returning equipment and a permeation and carbonization enhancement improvement method. Background Art

[0002] Among the numerous saline-alkali land amelioration measures in China and abroad, irrigation and salt removal are considered an effective method. Based on the principle that "salt follows water, salt follows water," leaching with large amounts of fresh water can reduce salt accumulation in the soil surface, thereby achieving the goal of reducing salinity and improving soil quality. However, clayey saline soils in saline-alkali land, particularly those with clay interlayers, are particularly challenging to manage. These soils generally suffer from low organic matter content, poor permeability, susceptibility to waterlogging, and difficulty in removing salt. Traditional high-pressure salt irrigation and drainage technologies have limited effectiveness and may even cause waterlogging, leading to a series of environmental problems such as secondary salinization. Physical amelioration measures, such as deep plowing and micro-area covering, can reduce soil salinity in the short term, but the effects are short-lived and the operating costs of oversized machinery are high. Furthermore, concealed pipe salt removal technologies are limited in areas with clay interlayers, primarily because the presence of these interlayers hinders the downward migration of water and salt, preventing effective salt leaching.

[0003] As an important technical means of improving saline-alkali land, returning straw to the field has demonstrated significant advantages in domestic and international practices, but it also faces certain limitations. Returning an appropriate amount of straw to the field helps improve the physical structure of the soil, enhance the soil's ability to retain water and fertilizer, and effectively alleviate the problem of soil compaction. However, the microbial activity in saline-alkali land is usually suppressed, and the slow decomposition rate of straw in traditional straw return may lead to an imbalance in the initial carbon-nitrogen ratio, thus affecting crop growth. In addition, if the straw is not handled properly, such as if it is not crushed finely enough, it may cause the soil pores to become too large, exacerbating the increase in salinity and even causing pest and disease problems. Therefore, traditional straw return to the field also requires supporting engineering measures, such as concealed pipes for salt drainage, to prevent salt backflow. Without continuous management, the improvement effect may gradually deteriorate.

[0004] To this end, there is an urgent need for special supporting equipment and related treatment methods that can break through the constraints of clay interlayers, improve the physical and chemical properties of deep soil, and thus form a sustainable soil health maintenance mechanism. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the present invention proposes an integrated straw powder deep-layer returning device and a method for increasing infiltration and carbonization.

[0006] The technical solution of the present invention to solve the technical problem is as follows: an integrated straw powder deep-layer returning device for saline-alkali land is proposed, comprising a carrier plate, travel wheels are respectively provided on both sides of the carrier plate, and at least one group of punching parts, compacting parts, feeding parts and soil covering parts are sequentially arranged on the carrier plate; a through hole is provided on the carrier plate, located below the punching part, and the threaded drill rod in the punching part can penetrate the through hole to punch holes in the saline-alkali land area below to form a feeding channel; a feeding port is provided on the carrier plate, and is internally connected to a feed hopper, the feeding part is located on one side of the feed hopper, and with the help of a linearly movable push plate, the straw powder below the feeding part is pushed into the feed hopper; the compacting part is located above the feed hopper, and with the help of a pressure rod in the compacting part, the straw powder in the feeding channel is compacted.

[0007] Preferably, the feeding part includes a storage bin for storing straw powder, and there is at least one group of discharge cavities connected to the storage bin below the storage bin, and partitions are provided on both sides of the bottom of the storage bin, and the two partitions form a discharge bin between the bottom of the storage bin; a rotatable impeller is provided in the discharge cavity, and the straw powder in the storage bin is fed into the discharge bin by means of the impeller, and the push plate is placed between the two partitions and moves linearly to push the straw powder in the discharge bin into the guide hopper.

[0008] Preferably, a first power source is fixed on the carrier plate, the output end of the first power source is connected to a pushing beam, the pushing beam is connected to a pushing rod corresponding to the feeding part, and the pushing rod is connected to the pushing plate; it also includes a material guide trough opened on the carrier plate, the material guide trough is opened between the discharge bin and the material guide hopper, and the push plate moves linearly along the material guide trough to push the straw powder into the material guide hopper.

[0009] Preferably, the compacting part includes two spaced-apart supports, each of which is provided with a vertical first chute, a supporting beam is connected between the two first chutes, and a pressure rod corresponding to the guide hopper is connected to the bottom of the supporting beam; it also includes a first lifting control component, which is connected between the supporting beam and the carrier plate, and drives the support to move vertically between the two first chutes with the help of the first lifting control component, so that the pressure rod passes through the guide hopper to compact the straw powder inside the feeding channel.

[0010] Preferably, the punching part includes two supports arranged at intervals, each of which is provided with a vertical second slide groove, a crossbeam plate is commonly connected between the two second slide grooves, and a second lifting control component is commonly connected between the crossbeam plate and the carrier plate, and the crossbeam plate is driven to slide linearly between the two second slide grooves with the help of the second lifting control component; it also includes a threaded drill rod connected to the bottom of the crossbeam plate, and several groups of threaded drill rods are used to realize rotational drilling with the help of the driving component.

[0011] Preferably, a first power source is fixed on the carrier plate, and the output end of the first power source is connected to a pushing beam, and a pushing rod corresponding to the feeding part is connected to the pushing beam, and the pushing rod is connected to the pushing plate, and the front end of the pushing plate is connected to two side baffles, and a front baffle is commonly connected between the two side baffles, which are jointly enclosed to form a cavity for receiving the straw powder dropping, and the straw powder in the dropping cavity is pushed into the guide hopper with the help of the pushing plate.

[0012] Preferably, a telescopic tube is connected to the bottom of the guide hopper, a limiting ring is connected to the bottom of the telescopic tube, two guide rods are connected above the limiting ring, the two guide rods are placed inside the guide hopper and fit against the inner wall of the guide rod; it also includes a traction ring that can be slidably sleeved on the limiting ring, a traction rope is commonly connected between the traction ring and the outer wall of the front baffle, and with the help of the front baffle and the traction rope, the telescopic tube can be switched between the two states of being lowered to the top of the feeding channel and being lifted.

[0013] The present invention also proposes a method for improving saline-alkali land by increasing permeability and carbonization, which is implemented by using any of the above-mentioned integrated straw powder deep-layer returning equipment for saline-alkali land, and comprises the following steps: S1: Pre-process straw powder that meets the requirements; S2: Level the land in the saline soil improvement area; S3: Drill holes in saline soil to form feeding channels through the plow bottom layer and clay interlayer; S4: After the drilling is completed, the straw powder is placed in the feeding hole and compacted; S5: Covering the straw powder and feeding channels with soil; S6: Use irrigation water or rainwater to wash saline soil, and straw powder to improve vertical drainage and desalination efficiency; S7: After the set expected time is reached, the feeding channel position is updated, and steps S1 to S6 are repeated to change or increase the area ratio of the improved plot.

[0014] Preferably, the specific steps of S3 to S5 are: Sa: Connect the saline-alkali land integrated straw powder deep-layer returning equipment with the traction power equipment; Sb: Place the crushed and sieved straw powder in the storage bin in advance; Sc: Start the integrated saline-alkali land straw powder deep-layer returning equipment and traction power equipment, move them to the preset position, and control the drilling part through the control system to drill holes in the saline soil to form feeding channels with a feeding channel depth of 2ncm; Sd: Control the traction power equipment to continue moving, so that the guide hopper 8 is placed above the previous feeding channel. The feeding part is controlled by the control system. The impeller rotates to discharge the straw powder into the discharge bin. Then the push rod pushes the straw powder in the discharge bin into the guide hopper and drops it along the guide hopper into the feeding channel. The discharged volume is equal to the volume of the feeding channel. Then the push rod is reset. Start the compacting part. As the pressure rod moves downward, the straw powder in the feeding channel is compacted in situ for the first time. The compaction depth is n cm. Se: Drive the impeller to rotate again to discharge the straw powder into the discharge bin. The discharge amount this time is 1 / 2 of the first time. Use the push rod to push the straw powder in the discharge bin into the guide hopper, and then drop it along the guide hopper into the feeding channel. Then reset the push rod; start the compaction part again to carry out the second in-situ compaction. The compaction depth is n / 2cm. Sf: As the traction power equipment is controlled to move to the designated downward position, the covering part is activated to cover the opened feeding channel and the straw powder inside with soil during the movement of the traction power equipment; Sg: With the continuous movement of the traction power equipment, the integrated actions of drilling, feeding, compacting and covering soil at other points are completed.

[0015] Preferably, in steps Sd and Se, as the push plate moves, the traction rope is gradually loosened, and under the action of the limit ring, the bottom of the telescopic tube is driven to fall and lowered to the top of the feeding channel, and then the straw powder in the blanking cavity passes through the guide hopper and the telescopic tube and is fed into the feeding channel; when the push plate is reset, the traction rope and the limit ring are gradually tightened, and under the guidance of the guide rod, the telescopic tube moves vertically upward and detaches to the top.

[0016] Compared with the existing technology, the above technical solution has the following advantages or beneficial effects: 1. The integrated straw powder deep-layer returning equipment proposed in the present invention, with the help of the cooperation between the punching part, the compacting part, the feeding part and the soil covering part, fills the straw powder into the saline soil for decomposition, realizes integrated operation, significantly improves the feeding efficiency of the straw powder, reduces the material processing cost, and optimizes the standardization and high-quality vertical burial effect of the vertical burial operation, thereby improving the efficiency of the overall operation.

[0017] 2. In the present invention, the feeding part is provided with an impeller, a discharge bin, a push plate and a guide hopper for feeding. When feeding, the lower part of the storage bin is funnel-shaped and obliquely connected to the discharge bin, which can quantitatively, conveniently and quickly feed a certain amount of straw powder into the feeding channel, preventing the straw powder from being stuck and the difficulty of feeding, and realizing the controllable and precise feeding of straw powder under the premise of normal feeding.

[0018] 3. The improvement method proposed in the present invention, on the one hand, utilizes straw powder to achieve waterlogging and salt drainage functions while avoiding water resource waste caused by rapid water infiltration, fully leveraging its potential for deep-seated fertilization and carbon increase, effectively promoting the sustainable resource utilization and efficient recycling of agricultural waste. The application of straw powder not only improves the soil's carbon sequestration capacity but also enhances the penetration depth of plant roots, thereby achieving a five-dimensional synergistic effect of "increased infiltration - fertilization - carbon sequestration - increased production - and ecological benefits," providing an efficient and green solution for the ecological improvement of saline-alkali land and the sustainable development of agriculture.

[0019] 4. The combination of the equipment and method of the present invention effectively breaks the deep soil barrier, breaks the restriction of the plow bottom layer and clay interlayer on root growth and material circulation, and significantly improves the decomposition efficiency of input materials such as straw powder. The humic acid produced during the decomposition process has a strong sodium ion adsorption capacity and can effectively reduce the alkalinity of deep soil. At the same time, the vertically buried straw powder forms a stable vertical biological channel in the soil, promotes the downward growth of crop roots, guides the roots to take root deeply, thereby improving the rhizosphere environment and enhancing the crop's ability to absorb water and nutrients.

[0020] 5. In the present invention, a telescopic tube is further provided below the hopper. The traction rope cooperates with the push plate to form a protective channel, establishing a relatively sealed connection with the feeding channel. This effectively prevents the straw powder from being dispersed by airflow during the feeding process. The traction rope design allows the traction rope to be relaxed when the limit ring falls, allowing it to adaptively adjust to the depth of the feeding channel within a certain depth range. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0022] Figure 1 It is a schematic diagram of the structure of the straw powder after vertical burial in the present invention.

[0023] Figure 2 It is a top view of the feeding channel in the present invention.

[0024] Figure 3 It is a three-dimensional structural diagram of the integrated straw powder deep-layer returning equipment for saline-alkali land with traction power equipment.

[0025] Figure 4 It is a three-dimensional structural diagram of the saline-alkali land integrated straw powder deep-layer returning equipment of the present invention.

[0026] Figure 5 It is a top view of the integrated straw powder deep-layer returning equipment for saline-alkali land of the present invention.

[0027] Figure 6 It is a schematic diagram of the internal structure of the feeding part in the present invention.

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the second embodiment.

[0029] Figure 8 yes Figure 7 Schematic diagram of the structure of the traction rope and telescopic tube in the initial state of the middle push plate.

[0030] Figure 9 yes Figure 7 Schematic diagram of the structure of the traction rope and telescopic tube when the middle push plate is in the pushing state.

[0031] Figure 10 yes Figure 8 Enlarged view of part A.

[0032] Figure 11 yes Figure 10 Schematic diagram of the structure of the telescopic tube and its interior.

[0033] Description of the marks in the figure: T2, feeding channel; T3, saline soil; T4, first clay interlayer; T5, second clay interlayer; T6, plow bottom layer; 1. Carrier plate; 2. Covering part; 3. Punching unit; 31. Through hole; 32. Threaded drill rod; 33. Support; 34. Second chute; 35. Crossbeam; 36. Second lifting control assembly; 37. Drive assembly; 4. Compacting unit; 41. Press rod; 42. Support seat; 43. First chute; 44. Support beam; 45. First lifting control assembly; 5. Feeding section; 51. Storage bin; 52. Discharging chamber; 53. Partition; 54. Discharging bin; 55. Impeller; 6. Traction power equipment; 7. Discharge port; 8. Guide hopper; 9. Push plate; 10. First power source; 11. Push beam; 12. Push rod; 13. Guide trough; 14. Side baffle; 15. Front baffle; 16. Blanking cavity; 17. Telescopic tube; 18. Limiting ring; 19. Guide rod; 20. Traction ring; 21. Traction rope. DETAILED DESCRIPTION

[0034] In order to make the purposes, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0036] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0037] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0038] Example 1 like Figures 1 to 6 As shown, this embodiment proposes an integrated straw powder deep-layer returning device for saline-alkali land, which includes a carrier plate 1, with travel wheels provided on both sides of the carrier plate 1, and at least one set of punching parts 3, compacting parts 4, feeding parts 5 and covering parts 2 provided in sequence on the carrier plate 1. At least one set of through holes 31 is also provided on the carrier plate 1, and the through holes 31 are distributed linearly in the transverse direction and are all located below the punching parts 3. The threaded drill rods 32 in the punching parts 3 can be moved downward to penetrate the through holes 31 to punch holes in the saline-alkali land area below, forming a feeding channel T2. A feed opening 7 is also provided on the carrier plate 1, and a feed hopper 8 is connected to the inside of the feed opening 7. The feed part 5 is located on one side of the feed hopper 8, and the straw powder below the feed part 5 is pushed into the feed hopper 8 by means of a linearly movable push plate 9. The compacting part 4 is located above the material guide hopper 8 , and the straw powder in the feeding channel T2 is compacted by means of a pressing rod 41 in the compacting part 4 that penetrates the material guide hopper 8 .

[0039] In this design, the drilling unit precisely drills holes in the clay interlayer of saline-alkali soil. The feeding unit 5 then uses the feeding unit to meter straw powder into the discharge bin 54 twice. The pusher 12 pushes the straw powder into the discharge bin 54, where it is then guided further into the drilled hole by the guide hopper 8. Next, the compacting unit's pressure rod 41 compacts the fed straw powder. This step consists of two in-situ feeding and compaction steps, ensuring a compression ratio of 2:1 and evenly distributing the straw powder into the soil. Finally, the covering unit 2 completes the soil covering operation, achieving an integrated operation.

[0040] In this embodiment, the feeding section 5 includes a storage bin 51 for storing straw powder, and the storage bin 51 has at least one set of discharge chambers 52 connected to the storage bin 51 below. Two partitions 53 are provided on both sides of the bottom of the storage bin 51. The bottoms of the two partitions 53 are fixedly connected to the carrier plate 1. The two partitions 53 and the bottom of the storage bin 51 and the space above the carrier plate 1 together enclose a discharge bin 54. Furthermore, a rotatable impeller 55 is provided in the discharge chamber 52, and the impeller 55 is driven to rotate by a rotating motor provided outside the storage bin 51. With the help of the rotation of the impeller 55, the straw powder in the storage bin 51 is fed into the discharge bin 54. The push plate 9 is placed in the space between the two partitions 53 and moves linearly to push the straw powder in the discharge bin 54 into the guide hopper 8.

[0041] The partition 53 is 60 cm long, 10 cm apart, and 20 cm high. Two scale lines are marked on the partition 53: the upper scale line is n cm, and the lower scale line is n / 2 cm. The scale lines provide a clearer indication of the amount of straw powder dropped between the two times. For the first drop, if the amount reaches n cm, the approximate amount of straw powder dropped into the feeding channel T2 will be sufficient for the first drop. For the second drop, if the amount reaches n / 2 cm, the approximate amount of straw powder dropped into the feeding channel T2 will be sufficient for the second drop.

[0042] This device is preferably equipped with two sets of discharge chambers 52 and impellers 55. The two sets of impellers 55 are used to discharge the material. During the test phase, after the two sets of impellers 55 rotated n times, the straw powder dropped was able to fill the feeding channel T to a height of 280 cm. During the second feeding process, the two impellers 55 can be controlled to rotate n / 2 times, performing a second feeding operation, so that the material can be filled to a height of 40 cm again in the original state.

[0043] Furthermore, in order to achieve the synchronous movement of several groups of push plates 9, a first power source 10 is fixed on the carrier plate 1. The first power source 10 can be any telescopic member such as a telescopic oil cylinder, an electric push rod, a pneumatic push rod, etc. A push beam 11 is connected to the output end of the first power source 10, and a push rod 12 corresponding to the push portion is connected to the push beam 11, and the push plate 9 is connected to the push rod 12; it also includes a guide trough 13, which is opened between the discharge bin 54 and the guide hopper 8. The push plate 9 moves linearly along the guide trough 13, so that the straw powder is pushed into the guide hopper 8 through the guide trough 13, preventing the straw powder from scattering to the edge during the pushing process. In this design, only the first power source 10 is used to achieve the pushing of several groups of push rods, which can maximize cost savings and reduce expenses.

[0044] In this embodiment, the compacting part 4 includes two spaced-apart support seats 42, each of which is provided with a vertical first chute 43. A support beam 44 is connected between the two first chutes 43. The bottom of the support beam 44 is connected to a pressure rod 41 corresponding to the guide hopper 8. The compacting part 4 also includes a first lifting control component 45, which is connected between the support beam 44 and the carrier plate 1. With the help of the first lifting control component 45, the support beam 44 can be driven to move vertically between the two first chutes 43, so that the pressure rod 41 can move downward, pass through the guide hopper 8, and extend into the feeding channel T2, thereby compacting the straw powder inside the feeding channel T2.

[0045] The bottom of the pressing rod 41 is semicircular in shape, which can control the degree of compaction of the straw powder to a certain extent. The compaction depth after the first feeding is 0-40 cm, and the compaction depth after the second feeding is 0-20 cm.

[0046] In the above design, the feeding unit 5 is located on the side of the hopper 8, and the straw powder is pushed into the hopper 8 by a push rod. The compacting unit 4 is located above the hopper 8, and the straw powder is compacted by a pressure rod 41 that penetrates the hopper 8 and presses down. This design layout can reduce interference between the feeding unit 5 and the compacting unit 4, avoiding problems such as collisions between the two during operation.

[0047] In this embodiment, the punching portion 3 includes two spaced-apart supports 33, a second lifting control assembly 36 is commonly connected between the two supports 33, and a vertical second slide groove 34 is provided on both supports 33. A crossbeam plate 35 is commonly connected between the two second slide grooves 34, and a second lifting control assembly 36 is commonly connected between the crossbeam plate 35 and the carrier plate 1, and the crossbeam plate 35 is driven to move linearly between the second slide grooves 34 by means of the second lifting control assembly 36; it also includes at least one group of threaded drill rods 32 connected to the bottom of the crossbeam, and several groups of threaded drill rods 32 are rotated to punch holes with the help of a driving assembly 37.

[0048] Furthermore, the drive assembly 37 includes support plates fixed at intervals above the crossbeam 35. A drive motor is connected to the support plates. The output shaft of the drive motor extends through the support plates and is then connected to a drive rod. The bottom of the drive rod extends through the crossbeam and is then connected to the aforementioned threaded drill rods 32. Each drive rod is fitted with a sprocket. A chain is connected between the sprockets on adjacent drive rods. The chains of adjacent drive rods are arranged in an alternating pattern. This chain drive achieves synchronous rotation of multiple groups of threaded drill rods 32. Using a single drive motor, the sprocket and chain cooperate to drive the rotation of multiple groups of threaded drill rods 32, effectively reducing manufacturing costs.

[0049] The support 33 and the support 42 share the same structure, as do the corresponding support beams 44 and beam plates 35. Both the first and second chutes 43 and 34 are T-shaped, with the two sides of the support beams 44 and beam plates 35 forming T-shaped structures. These can be inserted into the corresponding chutes and move linearly along them. This T-shaped structure creates a certain amount of space between the two, preventing them from slipping out during movement.

[0050] In this embodiment, the covering part 2 is used to cover the straw powder fed into the feeding hole with soil. The covering part 2 is a rotary tillage blade group. One end of the rotary tillage blade group is hinged to the carrier plate 1 and can rotate around the hinge point to achieve lifting and lowering. In some embodiments, the rotary tillage blade group can be a group of structures with a length similar to that of the carrier plate 1, hung behind the carrier plate 1, which can not only achieve the filling of the feeding channel T2, but also achieve rotary tillage of the soil in other positions; a split structure can also be used to set several groups of rotary tillage blade groups corresponding to the guide hopper 8, which is only used to achieve the covering of the feeding channel T2. The position and number of the rotary tillage blade group correspond to the guide hopper 8, and fixed-point rotary tillage is performed to complete the covering operation after the straw powder is compacted. The length of the rotary tillage blade group can be 2m. Soil covering and leveling are carried out simultaneously, reducing additional soil covering operations, saving labor and efficiency.

[0051] Furthermore, the rotary tiller blade assembly includes an articulated seat fixed to the rear of the carrier plate 1. A pull rod is hingedly connected to the articulated seat, and the angle between the pull rod and the carrier plate 1 can be adjusted and fixed. A rotatable rotary tiller shaft is disposed between the two pull rods, and a plurality of rotary tiller blades are disposed on the rotary tiller shaft. In some other embodiments, a servo motor can be added to control the active rotation of the rotary tiller shaft and the rotary tiller blades.

[0052] This integrated straw powder deep-layer return equipment for saline-alkali land uses a feeding unit 5 to push straw powder into the feeding channel T2 by drilling holes in the clay interlayer area of ​​the saline-alkali land. The feeding unit 4 then compacts the straw powder, preventing the straw powder from loosely piling up to form an overhead layer or large-pore channels, which could lead to rapid loss of surface moisture and nutrients. This equipment also stabilizes the soil's layered structure, significantly preserving the clay interlayer's salt-control barrier function and slowing the rate of salt migration. It also increases the contact area with the soil, promoting organic carbon adsorption through a dual mechanism of physical extrusion and chemical chelation, thereby improving carbon sequestration efficiency. This eliminates the need for large-scale deep plowing and loosening of the soil, saving the cost of large-scale machinery operations while protecting soil moisture and achieving the goals of efficient infiltration and deep carbon sequestration, achieving the five-dimensional synergistic effects of "infiltration enhancement, fertilizer conservation, carbon sequestration, yield increase, and ecological conservation."

[0053] Correspondingly, the present invention also proposes a method for improving saline-alkali land by increasing infiltration and carbonization, which requires the use of the above-mentioned saline-alkali land integrated straw powder deep-layer field returning equipment, and specifically includes the following steps: S1: Pre-process straw powder that meets the requirements; The straw powder can be made of one of agricultural wastes such as wheat, corn, soybean, cotton, reed straw, rice husk, sawdust, etc., or a combination of multiple materials. After being crushed, it is passed through a 1 cm sieve to remove large pieces of debris to form the above-mentioned straw powder.

[0054] The use of this straw powder can not only improve the soil's carbon sequestration capacity, but also enhance the depth of plant roots, thereby achieving the five-dimensional synergistic effect of "increased infiltration - fertilizer retention - carbon sequestration - increased production - ecology", providing an efficient and green solution for the ecological improvement of saline-alkali land and sustainable agricultural development.

[0055] S2: Level the land in the saline soil T3 improvement area; S3: Drill holes in the saline soil T3 to form a feeding channel T2 that passes through the plow bottom layer T6 and the clay interlayer. The clay interlayer is divided into a first clay interlayer T4 and a second clay interlayer T5. When drilling, a reasonable drilling density is determined based on the thickness and distribution of the soil clay interlayer. The drilling distance can be set to 1 to 3 meters. The diameter of the feeding channel T2 is 10 cm and the depth is 80 cm. The feeding channel T2 is in a vertical state. S4: After drilling is completed, straw powder is placed in the feeding channel T2 and compacted; S5: Covering the straw powder and feeding channel T2 with soil; S6: Use irrigation water or rainwater to wash the saline soil T3, and straw powder to improve the vertical drainage and desalination efficiency; S7: After the set expected time is reached, the position of the feeding channel T2 is updated, and steps S1 to S6 are repeated to change or increase the area ratio of the improved plot.

[0056] This method effectively overcomes deep soil barriers, breaking the constraints imposed by the plow bottom layer T6 and clay interlayer on root growth and material circulation, significantly improving the decomposition efficiency of input materials such as straw powder. The humic acid produced during decomposition has a strong sodium ion adsorption capacity, effectively reducing the alkalinity of deep soil layers. Furthermore, the vertically buried straw powder forms stable vertical biological pathways in the soil, promoting downward root growth and guiding root penetration, thereby improving the rhizosphere environment and enhancing the crop's ability to absorb water and nutrients.

[0057] The specific steps from S3 to S5 are as follows: Sa: Connect the saline-alkali land integrated straw powder deep-layer returning equipment to the traction power equipment 6; Sb: The crushed and sieved straw powder is placed in the storage bin 51 in advance; Sc: Start the saline-alkali land integrated straw powder deep-layer returning equipment and the traction power equipment 6, move to the preset position, and control the drilling part through the control system to drill holes in the saline soil T3 to form the feeding channel T2. The feeding channel T2 has a depth of 2ncm; Sd: Control the traction power device 6 to continue moving, so that the guide hopper 8 is placed above the previous feeding channel T2, and the feeding part 5 is controlled to operate by the control system. The impeller 55 rotates to discharge the straw powder into the discharge bin 54, and then the push rod pushes the straw powder in the discharge bin 54 into the guide hopper 8, and drops along the guide hopper 8 into the feeding channel T2. The discharge volume is equal to the volume of the feeding channel T2, and then the push rod is reset; start the dynamic compacting part 4, and as the pressure rod 41 moves downward, the straw powder in the feeding channel T2 is compacted in situ for the first time, and the compaction depth is n (40) cm; Se: Drive the impeller 55 to rotate again, discharge the straw powder into the discharge bin 54, the discharge amount this time is 1 / 2 of the first time, push the straw powder in the discharge bin 54 into the guide hopper 8 with the help of the push rod, and drop it along the guide hopper 8 into the feeding channel T2, and then reset the push rod; start the compacting part 4 again, and perform the second in-situ compaction, with a compaction depth of n / 2 (20) cm; For Sd to Se, the first application of a larger amount of straw powder followed by compaction can act on the mid- to deep soil layers. Straw powder binds tightly to the deep soil, and the organic acids produced during its decomposition gradually neutralize alkaline substances in the deep layers. Furthermore, the straw's fibrous structure can break up soil compaction in the deep layers, enhancing air and water permeability and promoting salt leaching downward. The second application of a smaller amount of straw powder followed by compaction primarily affects the surface soil, reducing water evaporation, improving the surface soil aggregate structure, increasing its water retention capacity, and reducing salt re-accumulation in the surface layer.

[0058] Furthermore, by implementing two in-situ feedings and compaction procedures for straw powder, hole collapse is effectively avoided. The depth after feeding and compaction is controlled between 20 and 80 cm, and the 0-20 cm above the hole is backfilled with original soil to form a complete cover layer. By rationally arranging the hole density, soil moisture is not only effectively protected from large-scale disturbances, but also significantly improves the soil's vertical permeability. This operation method also takes into account the sustainable use of farmland, ensuring smooth daily farming operations and achieving a coordinated integration of improvement and production.

[0059] Sf: As the traction power device 6 is controlled to move to the designated downward position, the covering part 2 is activated to cover the opened feeding channel T2 and the straw powder inside with soil during the movement of the traction power device 6; Sg: As the traction power equipment 6 continues to move, the integrated actions of drilling, feeding, compacting and covering soil at other points are completed.

[0060] This method, through the construction of a "deep carbon pump" system, precisely buries straw powder as deep as 80 cm in the soil layer, driving the efficient input of new organic carbon into the soil's stable carbon pool and significantly improving carbon sequestration efficiency. This technology simultaneously breaks down structural barriers, such as the T6 layer of the plow bottom layer and the clay interlayer, enabling the long-term sequestration of organic carbon in deep soil layers. This fundamentally overcomes the limitations of the tillage layer and promotes sustainable improvement of the deep soil profile. This approach may provide quantifiable and scalable technical support for strengthening soil carbon sequestration capacity and restoring degraded ecosystems.

[0061] In general, the above method has the following effects: 1. Based on the principles of soil configuration and salinization control in soil science, and combined with the need for agricultural farming to protect soil structure, this technical solution uses a scientific density to arrange the feeding channels T2, which shows significant advantages over traditional deep plowing and deep loosening measures. Traditional deep plowing can easily destroy the structure of the soil layer, causing the plow bottom layer T6 to disappear and the different texture soil layers to be misplaced and superimposed, causing the pore connectivity of the soil to become disordered and the risk of salinization to increase; traditional deep loosening may penetrate the plow layer and turn the lower soil to the surface, resulting in further impoverishment of the plow layer and affecting crop growth. The non-disturbance improvement of the feeding channel T2 minimizes interference with the soil micro-ecosystem by maintaining the integrity of the original soil layer.

[0062] 2. Build an efficient water-vapor transmission channel. This improvement significantly enhances the soil's drainage and desalination capacity, allowing waterlogging or salt-leaching irrigation water from the upper layers to penetrate deeper without causing a dramatic loss of water, effectively reducing salt accumulation at the root level. Furthermore, preserving the intact clay interlayer fully utilizes its "salt barrier" function. Its adsorption and retention of salt ions, coupled with its low capillary rise rate, inhibits the migration of salt from deep layers to the surface with evaporation, thus forming a long-term salt regulation mechanism.

[0063] 3. From the perspective of optimizing the crop growth environment, stable soil structure and good permeability create suitable growth conditions for plant roots. Adequate oxygen supply promotes aerobic respiration, enhancing root vitality and nutrient absorption efficiency, while reducing the toxic effects of anaerobic conditions caused by waterlogging on the roots. This achieves a synergistic improvement in the ecological restoration of salinized soils and agricultural production efficiency.

[0064] 4. The advantages of compacted straw powder and returned to the field are mainly reflected in the soil improvement efficiency, carbon sequestration capacity, and operational feasibility. First, it enhances the targeted nature of soil improvement, realizes the optimization of physical structure, and directionally constructs a "soil improvement column". Straw powder that has been sieved 1 cm is buried vertically to form a vertical permeable belt, which is especially suitable for improving clay interlayer areas. The efficiency of drainage and desalination is improved, breaking through the plow bottom layer T6 can guide plant roots to grow deeper and improve water absorption capacity; deep burial depth improves carbon sequestration efficiency and reduces greenhouse gas emissions, which is more in line with low-carbon agricultural goals; compacted straw powder has nutrient slow-release and synergistic effects, which can avoid leaching losses caused by short-term nutrient surges; vertically distributed straw powder can form a nutrient gradient, giving priority to shallow-rooted crops, such as summer corn; deep layers supply deep-rooted crops, such as winter wheat, thereby improving nutrient utilization.

[0065] 5. Based on the needs of agricultural ecological environment protection and sustainable farmland management, straw powder is deeply buried, compressed, and returned to the field, followed by a surface covering (backfilling soil 20 cm from the surface). This not only prevents excessive seepage of irrigation water or rainwater, but also significantly reduces the risk of non-point source pollution and the incidence of pests and diseases. Compared to traditional straw crushing and surface returning technology, this method achieves multiple environmental benefits through the dual mechanisms of physical isolation and ecological regulation. From an ecological control perspective, the 20 cm soil barrier forms a natural isolation layer, effectively blocking the contact path between pathogens and insect eggs carried by straw and the surface tillage layer, reducing the breeding and spread of pests and diseases. It also spatially separates straw from weed seeds, significantly reducing the competition between weeds and crops for light, temperature, water, and fertilizer, inhibiting weed growth advantages and reducing the use of chemical herbicides.

[0066] In terms of non-point source pollution prevention and control, this technology avoids the non-point source pollution problem caused by the long decomposition cycle and incomplete decomposition of traditional straw crushing and returning to the field, which in turn leads to the risk of eutrophication; and after deep burial and compression treatment, the straw is in a relatively stable anaerobic environment, the decomposition process is more controllable, and the pollution load of surface runoff is reduced, while taking into account both farmland ecological restoration and non-point source pollution control while improving the environment.

[0067] 6. Aiming to coordinate soil carbon pool regulation and improve farmland quality, the "Deep Carbon Pump" system utilizes innovative deep-injection technology using compressed straw powder to efficiently sequester carbon from agricultural organic waste. This technology utilizes a precise deep application process to embed straw powder into the soil at a depth of up to 80 cm, breaking through the limitations of traditional tillage layers and the barriers of clay interlayers to create a stable soil carbon sink. Through the synergistic effect of mechanical vertical operation and biological processes, the system effectively breaks down the physical barrier between the plow bottom layer (T6) and the clay layer while preserving the original tillage layer. This significantly improves soil vertical permeability, creating conditions for deep migration and long-term storage of organic carbon. From a soil carbon cycle perspective, the relatively stable temperature, humidity, and anaerobic environment in deep soil significantly slow the decomposition rate of organic carbon. Furthermore, the vertical pore network formed by deep mechanical drilling promotes the binding of organic carbon to mineral particles, achieving long-term stability of the carbon pool through a dual mechanism of physical protection and chemical chelation. This innovative technology not only effectively enhances the carbon sequestration capacity of farmland ecosystems but also fundamentally improves deep soil structure. Through continuous input of organic carbon, the soil particle composition can be gradually optimized, the bulk density can be reduced, the porosity can be increased, and favorable conditions can be created for the deep growth of crop roots, thus promoting the sustainable development of farmland ecosystems.

[0068] Example 2 like Figure 7 - Figure 10 As shown, based on Example 1, considering that when the straw powder is fed into the feeding channel T2 through the guide hopper 8, a certain gap is operated between the lower end of the guide hopper 8 and the hole entrance, a closed and windproof feeding channel cannot be formed, resulting in external airflow entering the feeding path through the gap, causing the straw powder to be swirled and blown away by the airflow during the falling process, resulting in the overflow and loss of straw powder, and affecting the precise control of the feeding amount.

[0069] To this end, the present invention has designed the following structure to prevent the straw powder from being blown away: A first power source 10 is fixed on the carrier plate 1, and the output end of the first power source 10 is connected to a pushing beam 11, and the pushing beam 11 is connected to a pushing rod corresponding to the feeding part 5, and the pushing rod 12 is connected to a pushing plate 9, and the front end of the pushing plate 9 is connected to two side baffles 14, and a front baffle 15 is commonly connected between the two side baffles 14. The push plate 9, the side baffles 14 and the front plate are jointly enclosed to form a blanking cavity 16 for receiving straw powder, and the straw powder in the blanking cavity 16 is pushed into the guide hopper 8 with the help of the push plate 9.

[0070] In this design, the feeding cavity 16 forms a closed space when receiving the falling material. When the straw powder falls from the feeding part 5, it enters this cavity directly, which can avoid the generation of dust and other problems. During the pushing process, the straw powder is shielded by baffles on all sides, ensuring that the straw powder is confined within the feeding cavity 16 during the pushing process, avoiding material loss and feeding amount deviation caused by airflow, and forming a preliminary protection for the straw powder.

[0071] Furthermore, a telescopic tube 17 is connected to the bottom of the guide hopper 8 and is capable of telescopic movement. A limit ring 18 is connected to the bottom of the telescopic tube 17. The diameter of the limit ring 18 is larger than the diameter of the bottom of the guide hopper 8 and smaller than the diameter of the telescopic tube 17. The limit ring 18 is formed by a structure with spaced intervals inside the telescopic tube 17 with the help of support rods. The limit ring 18 itself has a certain weight and can generate a downward force to drive the telescopic tube 17 to expand. Two guide rods 19 are connected above the limit ring 18. The guide rods 19 are placed inside the guide hopper 8 and fit inside the guide rods 19. The guide rods 19 also include a traction ring 20 that can be slidably mounted on the limit ring 18. A traction rope 21 is connected between the traction ring 20 and the outer wall of the front baffle 15. With the cooperation of the front baffle 15 and the traction rope 21, the telescopic tube 17 can be switched between lowering to the top of the feeding channel T2 and lifting.

[0072] Specifically, the implementation steps in the process of adding straw powder are as follows: In the process of the push plate 9 pushing the straw powder to the guide hopper 8, as the push plate 9 moves, the traction rope 21 is gradually loosened, and under the action of the gravity of the limit ring 18 itself, the bottom of the telescopic tube 17 is driven to fall, and its bottom is lowered to above the feeding channel T2, covering the open space above the feeding channel T2, and then the straw powder in the blanking cavity 16 passes through the guide hopper 8 and the telescopic tube 17 and is fed into the feeding channel T2; when the push plate 9 is reset, the traction rope 21 and the limit ring 18 are gradually tightened, and under the guidance of the guide rod 19, the telescopic tube 17 moves vertically upward, and detaches from above the feeding channel T2, and is suspended above the surface of the saline soil T3.

[0073] In this design, a telescopic tube 17 forms a protective channel, establishing a relatively sealed connection with the feeding channel T2. This effectively prevents the straw powder from being blown away by airflow during the feeding process. The traction rope 21 is designed so that when the limit ring 18 falls, the traction rope 21 is in a relaxed state, allowing it to adaptively adjust to the distance between the carrier plate 1 and the feeding channel T2 within a certain depth range.

[0074] Furthermore, avoidance grooves can be opened on both sides of the guide hopper 8 to reserve a certain space between the front baffle 15 and the traction rope 21. When the front baffle 15 is pushed to the maximum stroke, since the traction rope 21 is partially located in the guide hopper 8, the avoidance groove design can allow the traction rope 21 to enter the avoidance groove to avoid interference between the two.

[0075] During the resetting process of the front baffle 15, by applying tension to the traction rope 21, the traction ring 20 can be driven to slide along the limit ring 18 to one end close to the feeding part 5, thereby freeing up space at the bottom of the guide hopper 8 and effectively avoiding interference with the pressure rod 41 and other problems.

[0076] Although the above describes the specific implementation methods of the invention in conjunction with the accompanying drawings, it does not limit the scope of protection of the invention. Based on the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present invention.

Claims

1. An integrated straw powder deep-layer returning device for saline-alkali land, comprising a carrier plate (1), with travel wheels provided on both sides of the carrier plate (1), characterized in that: Also includes At least one set of a punching portion (3), a compacting portion (4), a feeding portion (5), and a covering portion (2) are sequentially arranged on the carrier plate (1); A through hole (31) is formed on the carrier plate (1) and is located below the punching portion (3). A threaded drill rod (32) in the punching portion (3) can penetrate the through hole (31) to punch holes in the saline-alkali land area below to form a feeding channel (T2). The feeding port (7) is provided on the carrier plate (1) and is internally connected to a guide hopper (8). The feeding portion (5) is located on one side of the guide hopper (8) and is used to push the straw powder below the feeding portion (5) into the guide hopper (8) with the help of a linearly movable push plate (9); the compacting portion (4) is located above the guide hopper (8) and is used to pass through the guide hopper (8) with the help of a pressure rod (41) in the compacting portion (4) to compact the straw powder in the feeding channel (T2).

2. The saline-alkali land integrated straw powder deep-layer returning equipment according to claim 1 is characterized in that: The feeding part (5) includes a storage bin (51) for storing straw powder, and at least one discharge cavity (52) connected to the storage bin (51) is provided below the storage bin (51). Partitions (53) are provided on both sides of the bottom of the storage bin (51), and the two partitions (53) form a discharge bin (54) between the bottom of the storage bin (51). A rotatable impeller (55) is provided in the discharge cavity (52), and the straw powder in the storage bin (51) is fed into the discharge bin (54) by means of the impeller (55). The push plate (9) is placed between the two partitions (53) and moves linearly to push the straw powder in the discharge bin (54) into the guide hopper (8).

3. The saline-alkali land integrated straw powder deep-layer returning equipment according to claim 2 is characterized in that: The carrier plate (1) is fixed with a first power source (10), the output end of the first power source (10) is connected to a pushing beam (11), the pushing beam (11) is connected to a pushing rod (12) corresponding to the feeding part (5), and the pushing rod (12) is connected to the pushing plate (9); it also includes a guide trough (13) provided on the carrier plate (1), the guide trough (13) is provided between the discharge bin (54) and the guide hopper (8), and the push plate (9) moves linearly along the guide trough (13) to push the straw powder into the guide hopper (8).

4. The saline-alkali land integrated straw powder deep-layer returning equipment according to claim 1 is characterized in that: The compacting part (4) includes two spaced-apart support seats (42), each of which is provided with a vertical first chute (43), a support beam (44) connected between the two first chute (43), and a pressure rod (41) corresponding to the guide hopper (8) connected to the bottom of the support beam (44); and further includes a first lifting control component (45) connected between the support beam (44) and the carrier plate (1), and driven by the first lifting control component (45) to vertically move the support beam (44) between the two first chute (43), so that the pressure rod (41) passes through the guide hopper (8) to compact the straw powder inside the feeding channel (T2).

5. The saline-alkali land integrated straw powder deep-layer returning equipment according to claim 1 is characterized in that: The punching portion (3) includes two spaced supports (33), each of which is provided with a second vertical chute (34), a crossbeam (35) being commonly connected between the two second chute (34), a second lifting control assembly (36) being commonly connected between the crossbeam (35) and the carrier plate (1), and the crossbeam (35) is driven to slide linearly between the two second chute (34) by means of the second lifting control assembly (36); and further includes a threaded drill rod (32) connected to the bottom of the crossbeam (35), and a plurality of groups of threaded drill rods (32) are rotated to punch holes by means of a driving assembly (37).

6. The saline-alkali land integrated straw powder deep-layer returning equipment according to claim 2 is characterized in that: A first power source (10) is fixed on the carrier plate (1), and an output end of the first power source (10) is connected to a pushing beam (11), and a pushing rod (12) corresponding to the feeding part (5) is connected to the pushing beam (11), and the pushing rod (12) is connected to the pushing plate (9), and the front end of the pushing plate (9) is connected to two side baffles (14), and a front baffle (15) is commonly connected between the two side baffles (14), and they are jointly enclosed to form a cavity (16) for receiving straw powder, and the straw powder in the cavity (16) is pushed into the guide hopper (8) by means of the pushing plate (9).

7. The saline-alkali land integrated straw powder deep-layer returning equipment according to claim 6 is characterized in that: The bottom of the guide hopper (8) is connected to a telescopic tube (17), the bottom of the telescopic tube (17) is connected to a limit ring (18), and two guide rods (19) are connected above the limit ring (18), and the two guide rods (19) are placed inside the guide hopper (8) and fit the inner wall of the guide rod (19); it also includes a traction ring (20) that can be slidably sleeved on the limit ring (18), and a traction rope (21) is commonly connected between the traction ring (20) and the outer wall of the front baffle (15). With the help of the front baffle (15) and the traction rope (21), the telescopic tube (17) can be switched between the two states of being lowered to the top of the feeding channel (T2) and being lifted.

8. A method for improving saline-alkali land by increasing permeability and carbonization, characterized in that: The method is implemented by using the saline-alkali land integrated straw powder deep-layer returning device according to any one of claims 1 to 7, which comprises the following steps: S1: Pre-process straw powder that meets the requirements; S2: Leveling the land in the improved area of ​​saline soil (T3); S3: drilling holes in saline soil (T3) to form feeding channels (T2) through the plow bottom layer (T6) and clay interlayer; S4: After drilling is completed, straw powder is placed in the feeding channel (T2) and compacted; S5: Cover the straw powder and feeding channel (T2) with soil; S6: Using irrigation water or rainwater to wash saline soil (T3), straw powder improves vertical drainage and desalination efficiency; S7: After the set expected time is reached, the position of the feeding channel (T2) is updated, and steps S1 to S6 are repeated to change or increase the proportion of the improved plot area.

9. The method for improving saline-alkali land by increasing permeability and carbonization according to claim 8, characterized in that: The specific steps from S3 to S5 are: Sa: Connect the saline-alkali land integrated straw powder deep-layer returning equipment to the traction power equipment (6); Sb: The crushed and sieved straw powder is placed in a storage bin (51) in advance; Sc: Start the saline-alkali land integrated straw powder deep-layer returning equipment and traction power equipment (6), move to the preset position, and control the drilling part through the control system to drill holes in the saline soil (T3) to form a feeding channel (T2), and the feeding channel (T2) has a depth of 2ncm; Sd: Control the traction power device (6) to continue moving so that the guide hopper (8) is placed above the previous feeding channel (T2), and the feeding part (5) is controlled to operate by the control system. The impeller (55) rotates to discharge the straw powder into the discharge bin (54), and then the push plate (9) pushes the straw powder in the discharge bin (54) into the guide hopper (8), and drops along the guide hopper (8) into the feeding channel (T2). The discharge volume is equal to the volume of the feeding channel (T2), and then the push plate (9) is reset; start the compacting part (4), and as the pressure rod (41) moves downward, the straw powder in the feeding channel (T2) is compacted for the first time in situ, and the compaction depth is n cm; Se: The impeller (55) is driven to rotate again to discharge the straw powder into the discharge bin (54). The discharge amount this time is 1 / 2 of the first time. The straw powder in the discharge bin (54) is pushed into the guide hopper (8) by means of a push rod, and falls along the guide hopper (8) into the feeding channel (T2). The push rod is then reset. The compacting part (4) is started again to perform the second in-situ compaction. The compaction depth is n / 2 cm. Sf: As the traction power device (6) is controlled to move to the next designated position, the covering part (2) is activated during the movement of the traction power device (6) to cover the opened feeding channel (T2) and the straw powder inside with soil; Sg: As the traction power equipment (6) continues to move, the integrated actions of drilling, feeding, compacting and covering soil at other points are completed.

10. The method for improving saline-alkali land by increasing permeability and carbonization according to claim 9, characterized in that: In steps Sd and Se, as the push plate (9) moves, the traction rope (21) is gradually loosened, and under the action of the limit ring (18), the bottom of the telescopic tube (17) is driven to fall and placed above the feeding channel (T2), and then the straw powder in the drop cavity (16) passes through the guide hopper (8) and the telescopic tube (17) and is dropped into the feeding channel (T2); when the push plate (9) is reset, the traction rope (21) and the limit ring (18) are gradually tightened, and under the guidance of the guide rod (19), the telescopic tube (17) moves vertically upward and detaches from the feeding channel (T2).

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