Fertilizing device for cotton planting
By designing a sliding sleeve and a ball-driven discharge rocker structure, the problem of mechanical fertilizer spraying devices being unable to accurately spray fertilizer to the cotton roots was solved, achieving uniform and efficient fertilization, and reducing fertilizer waste and environmental pollution.
Patent Information
- Application Number
- CN202511281062.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-09
- Publication Date
- 2025-10-31
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Existing mechanical fertilizer application devices cannot accurately apply fertilizer to the roots of cotton plants, resulting in fertilizer waste and soil nutrient imbalance.
A fertilizer applicator was designed, comprising a sliding sleeve, a top ball, a discharge rocker, and an electric drive mechanism. The top ball slides to open the L-shaped valve cover, and the discharge rocker tilts up near the plant roots, causing the fertilizer to be thrown out in a parabolic trajectory. Combined with a reset spring and a groove structure, the device ensures that it quickly reaches the target position and achieves uniform fertilizer application.
This method allows fertilizer to be applied as close as possible to the cotton roots, improving the uniformity and efficiency of fertilization, reducing fertilizer waste, lowering production costs, and reducing environmental pollution.
Smart Images

Figure CN120858718A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of fertilization equipment technology, and more particularly to a fertilization equipment for cotton cultivation. Background Technology
[0002] As is well known, cotton needs to be fertilized at different stages of its growth, and quantitative fertilization devices are one of the guarantees that each cotton plant receives the required amount of fertilizer. With the continuous development of agricultural technology, precision and intelligent agricultural production methods are gradually gaining importance, and quantitative fertilization has become an important means to improve cotton yield and quality and reduce environmental pollution.
[0003] Traditional fertilization methods suffer from fertilizer waste. Excessive fertilization not only increases production costs but can also lead to soil nutrient imbalances and even water pollution. Quantitative fertilization can effectively control fertilizer application, allowing for precise application based on plant growth needs, thereby improving fertilizer utilization efficiency. Existing quantitative fertilization devices are mostly mechanical, and to avoid damaging the plants, fertilizer is often applied from a distance from the roots, resulting in significant waste. Therefore, we propose a novel fertilization device that can directly act on the plant roots. Summary of the Invention
[0004] To address the technical problem that existing mechanical fertilizer application devices cannot accurately apply fertilizer to the roots, this invention adopts the following technical solution:
[0005] A fertilization device for cotton cultivation includes a temporary storage box with a hollow interior in the shape of a cube. A supporting square tube is fixed to the bottom of the temporary storage box. A sliding sleeve is slidably connected to the bottom end of the supporting square tube, and a top ball is welded and fixed to the outer wall of the sliding sleeve near the bottom end. A compression spring is fixed between the bottom inner wall of the top ball and the bottom end of the supporting square tube. A rocker hinge hole is opened on one side of the supporting square tube near the bottom end and above the sliding sleeve. A discharge rocker with an upward-opening, groove-shaped structure is rotatably connected to the rocker hinge hole. The front and rear sides of the discharge rocker are close to... Coaxial shafts are fixed near the center of the two shafts, and driven pinions are fixed at opposite ends of the two shafts. The two driven pinions are the same size. Push racks that mesh with the corresponding driven pinions are fixed near the front and rear sides of the top of the sliding sleeve. The push racks are vertical. A second pull rope is fixed at one end of the discharge rocker that extends into the support square tube. The bottom of the temporary storage box has a discharge port at the middle of the top of the support square tube. An L-shaped valve cover is hinged to the bottom of the discharge port and is close to the bottom of the discharge port. The top of the second pull rope is fixed to the end of the L-shaped valve cover away from the hinge axis.
[0006] Preferably, the discharge rocker plate has a 120-degree "7" shape, and the side of the supporting square tube away from the rocker plate hinge hole is provided with an arc-shaped groove that slides with the end of the discharge rocker plate; a return spring is fixed inside the supporting square tube below the arc-shaped groove, and a steel wire is fixed at the other end of the return spring. The steel wire passes through the supporting square tube and is fixed to the end of the discharge rocker plate away from the second pull rope. A groove is reserved on the outer wall of the supporting square tube below the rocker plate hinge hole, and a strip-shaped rope hole for the steel wire to pass through is opened in the middle of the bottom of the groove.
[0007] Preferably, the top end of the sliding sleeve has a notch located directly below the discharge rocker, and the width of the notch is greater than the width of the discharge rocker; the top ball has a spherical shell structure, and the top end of the top ball has a rectangular locking hole for inserting the sliding sleeve; this allows the sliding sleeve to slide smoothly upwards without obstructing the rotation and reset of the discharge rocker.
[0008] Preferably, an inclined slide plate is fixed above the inner wall of the supporting square tube on the same side as the arc groove. The inclined slide plate guides all the falling material into the groove of the discharge rocker. A rope clamp is reserved in the middle of the end of the inclined slide plate away from the inner wall of the supporting square tube. The diameter of the rope clamp is larger than the diameter of the second pull rope. This can prevent the second pull rope from being worn off by the edge and improve the service life of the device. The inner walls of the front and rear sides of the rocker hinge hole are respectively opened with shaft insertion holes for inserting shaft rods.
[0009] Preferably, the bottom of the temporary storage box is designed with a conical bottom structure, and a guide tube is fixed at the bottom of the temporary storage box at the bottom of the discharge port. The inner diameter of the guide tube is the same as the diameter of the discharge port. A clamping spring is snapped onto the end of the L-shaped valve cover away from the fixed position of the pull rope two, and the end of the clamping spring away from the L-shaped valve cover is fixed to the vertical inner wall of the supporting square tube. This serves to press the L-shaped valve cover tightly against the bottom end of the guide tube. When discharge is required, only a downward pulling force needs to be applied to the pull rope two to overcome the squeezing force of the clamping spring.
[0010] Preferably, the top of the temporary storage box has a main feeding hole near the middle, and a box cover is screwed into the main feeding hole; the side of the temporary storage box has an observation window, and a transparent plate is provided in the observation window, so that the amount of material inside can be observed in real time, which is convenient for timely replenishment.
[0011] Preferably, the temporary storage box has a feeding port near its front, and the diameter of the feeding port is equal to the diameter of the discharge port. A feeding hose is inserted into the feeding port.
[0012] Preferably, the temporary storage box has an inwardly recessed U-shaped fixing groove on the side away from the rocker hinge hole, and straps are fixed to the inner walls of the opposite sides of the U-shaped fixing groove near the top. A handle is fixed to the bottom of the U-shaped fixing groove. The width of the U-shaped fixing groove is adapted to the diameter of an adult's arm. With the straps, the device can be fixed on the forearm for easy and precise positioning for fertilization.
[0013] Preferably, the bottom of the temporary storage box is provided with an extension sleeve, and the outer walls of both the front and rear sides of the extension sleeve are provided with horizontal T-shaped tracks. The same electric drive mechanism is slidably engaged on the two T-shaped tracks. The electric drive mechanism includes a U-shaped slot plate engaged on the two T-shaped tracks. A reduction motor is fixed below the U-shaped fixed groove on the U-shaped slot plate, and a drive wheel is fixed at the top of the output shaft of the reduction motor. A movable shaft is fixed near the circumferential edge on the side of the drive wheel away from the supporting square tube. A pull rope is fixed to the outer circumferential wall of the movable shaft, and a stud is fixed to the bottom of the pull rope. The stud is screwed to the top of the sliding sleeve. A U-shaped cover is fixed to the outer wall of the U-shaped slot plate, and batteries are provided inside the front and rear sides of the U-shaped cover. A switch for controlling the start of the reduction motor is provided on the handle.
[0014] Preferably, the front of the U-shaped outer cover has symmetrical winding rods fixed near the left and right sides, and a threaded hole for fixing the stud is opened between the two winding rods; when the electric drive mechanism is not in use, the whole thing can be removed and the pull rope can be coiled up.
[0015] The beneficial effects of this invention are as follows:
[0016] 1. By sliding the top ball and indirectly opening the L-shaped valve cover, the final fertilizer outlet can be brought as close as possible to the roots of the plant when spreading fertilizer. At the same time, the end of the discharge flap near the roots of the plant can be tilted up to throw the fertilizer in a parabolic shape, thereby allowing the fertilizer to be spread more evenly near the roots and improving the fertilization effect.
[0017] 2. By setting a groove that matches the final fertilizer outlet end of the discharge rocker, and with the setting of a reset spring, the side of the support square tube can be kept flush when not in use, so that the support square tube and the top ball can quickly reach the target position and reduce obstruction.
[0018] 3. By setting up an electric drive mechanism that is snapped onto the T-shaped track, when the user runs out of strength to manually poke and poke, the top ball can be pulled intermittently by switching on the handle, thereby achieving intermittent material discharge. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0020] Figure 2 This is a schematic diagram of the other side of the structure of the present invention;
[0021] Figure 3 This is a side view of the present invention;
[0022] Figure 4 For the present invention Figure 3 Sectional view along line AA;
[0023] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B;
[0024] Figure 6 This is a schematic diagram of the material discharge boom in this invention during material discharge;
[0025] Figure 7 This is a schematic cross-sectional view of the overall structure of the present invention during material discharge;
[0026] Figure 8 This is an exploded view of the electric drive mechanism in this invention;
[0027] Figure 9 This is an exploded view of the discharge rocker and sliding sleeve in this invention.
[0028] In the diagram: 1. Temporary storage bin; 101. Observation window; 102. U-shaped fixing groove; 103. Feeding port; 104. Discharge port; 2. Battery; 3. Supporting square tube; 301. Rocker hinge hole; 302. Strip rope hole; 303. Shaft insertion hole; 4. Discharge rocker; 5. Propulsion rack; 6. Top ball; 601. Rectangular locking hole; 7. Sliding sleeve; 701. Notch; 8. Driven pinion 9. Pull rope one; 10. Electric drive mechanism; 1001. U-shaped outer cover; 1002. Gear motor; 1003. Drive wheel; 1004. Winding rod; 1005. U-shaped slot plate; 11. Strap; 12. Switch; 13. Handle; 14. Slanted slide plate; 15. Reset spring; 16. Compression spring; 17. Pull rope two; 18. L-shaped valve cover; 19. Clamping spring; 20. Guide tube. Detailed Implementation
[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0030] In this embodiment, refer to Figures 1-9A fertilization device for cotton planting includes a temporary storage box 1, which is generally cubic with a cavity inside. A supporting square tube 3 is fixed to the bottom of the temporary storage box 1. A sliding sleeve 7 is slidably sleeved at the bottom end of the supporting square tube 3. A top ball 6 is welded and fixed to the outer wall of the sliding sleeve 7 near the bottom end. A compression spring 16 is fixed between the bottom inner wall of the top ball 6 and the bottom end of the supporting square tube 3. A rocker hinge hole 301 is opened on one side of the supporting square tube 3 near the bottom end and above the sliding sleeve 7. A discharge rocker 4 with an upward-opening, groove-shaped structure is rotatably connected to the rocker hinge hole 301. Coaxial shafts are fixed to the front and rear sides of the discharge rocker 4 near the middle. The shafts are horizontally arranged, and driven pinions 8 are fixed to the opposite ends of the two shafts. The two driven pinions 8 are the same size. The top of the sliding sleeve 7 is divided into two sections near the front and rear sides. A push rack 5 is fixedly attached to a corresponding driven pinion 8; the push rack 5 is in a vertical position, and a pull rope 17 is fixed to one end of the discharge rocker 4 that extends into the support square tube 3; the bottom of the temporary storage box 1 is located at the middle of the top of the support square tube 3 and has a discharge port 104. An L-shaped valve cover 18 is hinged to the bottom of the discharge port 104 and is tightly attached to the bottom of the discharge port 104. The top of the pull rope 17 is fixed to the end of the L-shaped valve cover 18 away from the hinge axis. By sliding the top ball 6 and indirectly driving the L-shaped valve cover 18 to open, not only can the final fertilizer outlet be brought as close as possible to the roots of the plant when spreading fertilizer, but the end of the discharge rocker 4 near the roots of the plant can also be lifted to throw the fertilizer in a parabolic manner, thereby allowing the fertilizer to be spread more evenly near the roots and improving the fertilization effect.
[0031] Reference Figure 7 and Figure 9 The discharge rocker plate 4 has a 120-degree "7" shape structure. The side of the supporting square tube 3 away from the rocker plate hinge hole 301 is provided with an arc-shaped groove that slides with the end of the discharge rocker plate 4. Inside the supporting square tube 3, below the arc-shaped groove, a return spring 15 is fixed, and the other end of the return spring 15 is fixed with a steel wire. The steel wire passes through the supporting square tube 3 and is fixed to the end of the discharge rocker plate 4 away from the second pull rope 17. The outer wall of the supporting square tube 3 has a groove reserved below the rocker plate hinge hole 301, and a strip rope hole 302 for the steel wire to pass through is opened in the middle of the bottom of the groove. By setting a groove that matches the final fertilizer outlet end of the discharge rocker plate 4, and with the setting of the return spring 15, the side of the supporting square tube 3 can be kept flush when not in use, so that the supporting square tube 3 and the top ball 6 can quickly reach the target position and reduce obstruction.
[0032] Reference Figure 6 and Figure 9The top end of the sliding sleeve 7 has a notch 701 located directly below the discharge rocker 4, and the width of the notch 701 is greater than the width of the discharge rocker 4; the top ball 6 has a spherical shell structure, and the top end of the top ball 6 has a rectangular locking hole 601 for inserting the sliding sleeve 7; with this setting, the sliding sleeve 7 can slide smoothly upwards without obstructing the rotation and reset of the discharge rocker 4.
[0033] Reference Figure 4 An inclined slide plate 14 is fixed on the inner wall of the supporting square tube 3 above the arc groove on the same side. The inclined slide plate 14 guides all the falling material into the groove of the discharge rocker plate 4. A rope clamp is reserved in the middle of the end of the inclined slide plate 14 away from the inner wall of the supporting square tube 3. The diameter of the rope clamp is larger than the diameter of the second pull rope 17. This can prevent the second pull rope 17 from being worn off by the edge and improve the service life of the device. The inner walls of the front and rear sides of the rocker plate hinge hole 301 are respectively opened with shaft insertion holes 303 for inserting shaft rods.
[0034] Reference Figures 4-5 The bottom of the temporary storage box 1 is set with a conical bottom structure, and a guide tube 20 is fixed at the bottom of the discharge port 104. The inner diameter of the guide tube 20 is the same as the diameter of the discharge port 104. The end of the L-shaped valve cover 18 away from the fixed position of the pull rope 17 is clamped with a clamping spring 19, and the end of the clamping spring 19 away from the L-shaped valve cover 18 is fixed on the vertical inner wall of the supporting square tube 3. This serves to press the L-shaped valve cover 18 tightly against the bottom end of the guide tube 20. When it is necessary to discharge material, it is only necessary to apply a downward pulling force to the pull rope 17 and overcome the squeezing force of the clamping spring 19.
[0035] Reference Figure 1 and Figure 4 The top of the temporary storage box 1 has a main feeding hole near the middle, and a box cover is screwed into the main feeding hole; the side of the temporary storage box 1 has an observation window 101, and a transparent plate is installed in the observation window 101, so that the amount of material inside can be observed in real time, which is convenient for timely replenishment.
[0036] Reference Figure 1 The temporary storage box 1 has a feeding port 103 near the front, and the diameter of the feeding port 103 is equal to the diameter of the discharge port 104. The feeding port 103 is used to insert a feeding hose.
[0037] Reference Figure 2 The temporary storage box 1 has an inwardly recessed U-shaped fixing groove 102 on the side away from the rocker hinge hole 301. The inner walls of the opposite sides of the U-shaped fixing groove 102 are fixed with straps 11 near the top. The bottom of the U-shaped fixing groove 102 is fixed with a handle 13. The width of the U-shaped fixing groove 102 is adapted to the diameter of an adult's arm. With the straps 11, the device can be fixed on the forearm for accurate positioning and fertilization.
[0038] Reference Figures 3-4 , Figure 8 The bottom of the temporary storage box 1 is provided with an extension sleeve, and the outer walls of both the front and rear sides of the extension sleeve are provided with horizontal T-shaped tracks. The same electric drive mechanism 10 is slidably engaged on the two T-shaped tracks. The electric drive mechanism 10 includes a U-shaped slot plate 1005 engaged on the two T-shaped tracks. A reduction motor 1002 is fixed below the U-shaped fixing groove 102 on the U-shaped slot plate 1005. A drive wheel 1003 is fixed at the top of the output shaft of the reduction motor 1002. The drive wheel 1003 is fixed near the circumferential edge on the side away from the supporting square tube 3. A movable shaft is fixed, and a pull rope 9 is fixed to the outer circumference of the movable shaft. A stud is fixed to the bottom end of the pull rope 9, and the stud is screwed to the top of the sliding sleeve 7. A U-shaped outer cover 1001 is fixed to the outer wall of the U-shaped slot plate 1005, and a storage battery 2 is installed inside the front and rear sides of the U-shaped outer cover 1001. A switch 12 is provided on the handle 13 to control the opening of the reduction motor 1002. With this configuration, when the user is too weak to manually poke, the switch 12 on the handle 13 can be used to intermittently pull the top ball 6, thereby achieving intermittent material discharge.
[0039] Reference Figure 8 The U-shaped outer cover 1001 has symmetrical winding rods 1004 fixed on its front side near the left and right sides, and a threaded hole for fixing a stud is opened between the two winding rods 1004; when the electric drive mechanism 10 is not in use, the whole thing can be removed and the pull rope 9 can be coiled.
[0040] Working principle: When using this device, fill the temporary storage box 1 and tie it to the forearm of the arm. Two of these devices can be tied, one on each arm. Then walk between two rows of cotton to fertilize. At this time, simply point the final fertilizer outlet "discharge lever 4" towards the vicinity of the plant roots, and then squeeze the top ball 6 towards the vicinity of the roots. This will drive the two pusher racks 5 to move upward, which will indirectly drive the end of the discharge lever 4 near the arc groove to press down. Then, pull the pull rope 17 downward, which will drive the L-shaped valve cover 18 to open and the fertilizer will fall down. Then, the fertilizer will be sprinkled near the roots of the plant. At the same time, the end of the discharge lever 4 near the roots of the plant can be lifted up to throw the fertilizer in a parabolic shape, so that the fertilizer can be sprinkled more evenly near the roots.
[0041] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A fertilization device for cotton cultivation, comprising a temporary storage box (1) that is generally cubic with a hollow interior, wherein a supporting square tube (3) is fixed to the bottom of the temporary storage box (1), characterized in that, The bottom end of the supporting square tube (3) is slidably sleeved with a sliding sleeve (7), and a top ball (6) is welded and fixed to the outer wall of the sliding sleeve (7) near the bottom end. A compression spring (16) is fixed between the bottom inner wall of the top ball (6) and the bottom end of the supporting square tube (3). A rocker hinge hole (301) is opened on one side of the supporting square tube (3) near the bottom end and above the sliding sleeve (7). A discharge rocker (4) with an upward-opening, groove-shaped structure is rotatably connected in the rocker hinge hole (301). Coaxial shafts are fixed to the front and rear sides of the discharge rocker (4) near the middle. One end of each of the backs is fixed with a driven pinion (8); the top of the sliding sleeve (7) is fixed with a push rack (5) that meshes with the corresponding driven pinion (8) near the front and rear sides respectively; the end of the discharge rocker (4) that extends into the support square tube (3) is fixed with a second pull rope (17); and the bottom of the temporary storage box (1) is located in the middle of the top of the support square tube (3) with a discharge port (104). The bottom end of the discharge port (104) is hinged with an L-shaped valve cover (18) that is close to the bottom end of the discharge port (104). The top end of the second pull rope (17) is fixed to the end of the L-shaped valve cover (18) away from the hinge axis.
2. The fertilization device for cotton planting according to claim 1, characterized in that, The discharge rocker (4) has a 120-degree "7" shape structure. The side of the supporting square tube (3) away from the rocker hinge hole (301) is provided with an arc-shaped groove that forms a sliding fit with the end of the discharge rocker (4). The inside of the supporting square tube (3) is fixed with a reset spring (15) below the arc-shaped groove. The other end of the reset spring (15) is fixed with a steel wire. The steel wire passes through the supporting square tube (3) and is fixed to the end of the discharge rocker (4) away from the second pull rope (17). The outer wall of the supporting square tube (3) is reserved with a groove below the rocker hinge hole (301). The bottom of the groove has a strip rope hole (302) for the steel wire to pass through.
3. The fertilization device for cotton cultivation according to claim 1, characterized in that, The top end of the sliding sleeve (7) has a notch (701) located directly below the discharge rocker (4), and the width of the notch (701) is greater than the width of the discharge rocker (4); the top ball (6) has a spherical shell structure, and the top end of the top ball (6) has a rectangular card hole (601) for inserting the sliding sleeve (7).
4. A fertilization device for cotton cultivation according to claim 2, characterized in that, The inner wall of the supporting square tube (3) is fixed with an inclined slide plate (14) on the same side above the arc groove. The inclined slide plate (14) guides all the falling material into the groove of the discharge rocker plate (4). A rope clamp is reserved in the middle of the end of the inclined slide plate (14) away from the inner wall of the supporting square tube (3). The diameter of the rope clamp is larger than the diameter of the second pull rope (17).
5. A fertilization device for cotton cultivation according to claim 1, characterized in that, The bottom of the temporary storage box (1) is set as a conical bottom structure, and the bottom of the temporary storage box (1) is fixed with a guide tube (20) at the bottom of the discharge port (104). The inner diameter of the guide tube (20) is the same as the diameter of the discharge port (104). The end of the L-shaped valve cover (18) away from the fixed position of the second pull rope (17) is clamped with a retaining spring (19), and the end of the retaining spring (19) away from the L-shaped valve cover (18) is fixed on the vertical inner wall of the supporting square tube (3).
6. A fertilization device for cotton cultivation according to claim 1, characterized in that, The top of the temporary storage box (1) is reserved with a main feeding hole near the middle, and a box cover is screwed into the main feeding hole; the side of the temporary storage box (1) has an observation window (101), and a transparent plate is provided in the observation window (101).
7. A fertilization device for cotton cultivation according to claim 1, characterized in that, The temporary storage box (1) has a feeding port (103) inserted near the front, and the diameter of the feeding port (103) is equal to the diameter of the discharge port (104). The feeding port (103) is used to insert a feeding hose.
8. A fertilization device for cotton cultivation according to claim 1, characterized in that, The temporary storage box (1) has an inwardly recessed U-shaped fixing groove (102) on the side away from the rocker hinge hole (301), and straps (11) are fixed on the inner walls of the opposite sides of the U-shaped fixing groove (102) near the top. A handle (13) is fixed at the bottom of the U-shaped fixing groove (102), and the width of the U-shaped fixing groove (102) is adapted to the diameter of an adult's arm.
9. A fertilization device for cotton cultivation according to claim 8, characterized in that, The bottom of the temporary storage box (1) is reserved with an extension sleeve, and the front and rear outer walls of the extension sleeve are reserved with horizontal T-shaped tracks. The same electric drive mechanism (10) is slidably engaged on the two T-shaped tracks. The electric drive mechanism (10) includes a U-shaped slot plate (1005) engaged on the two T-shaped tracks. The U-shaped slot plate (1005) is located below the U-shaped fixing groove (102) and a reduction motor (1002) is fixed thereon. A drive wheel (1003) is fixed at the top of the output shaft of the reduction motor (1002). A movable shaft is fixed on the side of the drive wheel (1003) away from the support square tube (3) near the circumferential edge. A pull rope (9) is fixed on the outer circumferential wall of the movable shaft, and a stud is fixed at the bottom end of the pull rope (9). The stud is screwed to the top of the sliding sleeve (7). A U-shaped cover (1001) is fixed on the outer wall of the U-shaped slot plate (1005), and a battery (2) is installed inside the front and rear sides of the U-shaped cover (1001). A switch (12) is provided on the handle (13) to control the opening of the geared motor (1002).
10. A fertilization device for cotton cultivation according to claim 9, characterized in that, The front of the U-shaped outer cover (1001) is fixed with symmetrical winding rods (1004) near the left and right sides respectively, and a threaded hole for fixing a stud is opened between the two winding rods (1004).