Quantitative fertilization device for potato cultivation

Abstract

The utility model discloses a quantitative fertilization device for potato cultivation, which comprises a fertilizer storage barrel and a discharge port arranged at the center of the bottom end of the fertilizer storage barrel, a connecting sleeve is fixedly sleeved outside the discharge port, the bottom end of the connecting sleeve is connected with a corrugated delivery pipe, and the right end of the corrugated delivery pipe is connected with a metal charging barrel. The quantitative fertilization device for potato cultivation has the beneficial effects that a novel fertilization depth limiting device is additionally arranged outside the quantitative fertilization barrel and the metal charging barrel of the quantitative fertilization device for potato cultivation, and the device can limit the depth of the quantitative fertilization barrel inserted into the land mainly through a depth limiting plate; in this way, a farmer can be helped to accurately apply fertilizer to the land with the optimal depth during fertilization according to the fertilization requirement, so that the quantitative fertilization device for potato cultivation not only can perform quantitative fertilization, but also can accurately control the fertilization depth in the land; the cultivated and planted potatoes can grow more vigorously through fertilizer quantification and fertilization depth positioning.

Description

Technical Field

[0001] The utility model relates to the field of agriculture, in particular to a quantitative fertilization device for potato cultivation. Background Art

[0002] In modern agriculture, precision fertilization technology has gradually become one of the key factors in improving crop yield and quality. Traditional fertilization methods often rely on manual experience, which is not only easy to cause fertilizer waste, but also may lead to uneven distribution of soil nutrients, affecting the growth of crops. Especially in the cultivation of economic crops such as potatoes, a reasonable fertilization plan is crucial to its growth cycle, tuber development and final yield. In order to solve this problem, a new type of quantitative fertilization device for potato cultivation has been gradually introduced. The device adopts an automated and intelligent design concept, and enables farmers to customize fertilization according to the actual needs of crops by accurately controlling the amount of fertilizer applied. This device not only improves the utilization rate of fertilizers and reduces environmental pollution, but also effectively reduces the labor intensity of farmers. The core components of the device include fertilizer storage barrels, corrugated conveying pipes, metal barrels and quantitative fertilizer barrels, etc. Its structure is reasonable and easy to operate. During the fertilization process, farmers can control the amount of fertilizer by manual operation to ensure that each fertilization can deliver fertilizer to the soil in a timely and accurate manner, thereby achieving the best fertilization effect. In addition, the device is designed with portability in mind, making it easier for farmers to apply fertilizer between different plots of land.

[0003] However, the quantitative fertilization device for potato cultivation mainly injects fertilizer into the land where potatoes are cultivated in a quantitative manner. Therefore, when the quantitative fertilization device for potato cultivation is used, the quantitative fertilization cylinder needs to be inserted into the land where potatoes are cultivated, and then a quantitative fertilizer is applied. The applied quantitative fertilizer will be injected into the land where potatoes are cultivated through the quantitative fertilization cylinder. Although the quantitative fertilization cylinder can release fertilizer in a quantitative manner when inserted into the land, the quantitative fertilization cylinder is mainly inserted into the land by manpower, especially under different soil properties. The depth of insertion into the land is different, so the fertilization depth will be different, which will cause some potatoes to be unable to fully and evenly absorb fertilizer nutrients, affecting the growth of potatoes. Utility Model Content

[0004] The main purpose of the utility model is to provide a quantitative fertilization device for potato cultivation, aiming to solve the problem that the quantitative fertilization cylinder is mainly inserted into the soil by manpower, the fertilization depth is different, and the potatoes cannot fully and evenly absorb fertilizer nutrients, which affects the growth of potatoes.

[0005] In order to solve the above problems, the utility model proposes a quantitative fertilization device for potato cultivation, comprising a fertilizer storage barrel and a discharge port arranged at the center of the bottom end of the fertilizer storage barrel, the discharge port is sleeved and fixed with a connecting sleeve on the outside, the bottom end of the connecting sleeve is connected with a corrugated conveying pipe, the right end of the corrugated conveying pipe is connected with a metal barrel, and the corrugated conveying pipe is connected with the inside of the metal barrel, the bottom end of the metal barrel is connected with a quantitative fertilization barrel, the quantitative fertilization barrel is connected with the inside of the metal barrel, the bottom end of the quantitative fertilization barrel is conically arranged, and a fertilization depth limiting device is arranged on the outside of the lower side at the center of the metal barrel;

[0006] The fertilization depth limiting device includes a metal fixing sleeve, a connecting block, a support screw and a screw through hole. The metal fixing sleeves are provided in plurality, and the plurality of metal fixing sleeves are all sleeved and fixed on the lower outer side of the center of the metal barrel. The right ends of the plurality of metal fixing sleeves are connected with a connecting block, and a screw through hole is provided inside the connecting block. A support screw is inserted in the screw through hole, and the support screw can move up and down in the screw through hole.

[0007] In one embodiment, the fertilization depth limiting device also includes a depth limiting plate and a movable sleeve hole. The movable sleeve hole is arranged inside the depth limiting plate, and the depth limiting plate is sleeved on the outside of the quantitative fertilization cylinder through the movable sleeve hole. The depth limiting plate can move up and down on the outside of the quantitative fertilization cylinder through the movable sleeve hole, and the bottom end of the support screw is fixedly connected to the depth limiting plate by welding.

[0008] In one embodiment, the support screw can drive the depth limiting plate to move up and down, and the travel of the support screw driving the depth limiting plate to move up and down is greater than the length of the quantitative fertilization cylinder, and the depth limiting plate is a circular metal plate of aluminum alloy.

[0009] In one embodiment, the fertilization depth limiting device also includes a positioning nut A, a positioning nut B and a foot plate. The positioning nut A and the positioning nut B are both threadedly sleeved on the outside of the support screw. The positioning nut A and the positioning nut B are respectively located at the upper and lower ends of the connecting block, and a foot plate is welded at the lower right end of the center of the connecting block.

[0010] In one embodiment, the outer diameters of the positioning nut A and the positioning nut B are larger than the diameter of the screw hole, and the positioning nut A and the positioning nut B can move up and down on the outside of the support screw through the action of the thread when rotating clockwise or counterclockwise.

[0011] In one embodiment, a feeding port is provided at the center of the top of the fertilizer storage barrel, a sealing end cap is threadedly sleeved on the outer surface of the top opening of the feeding port, and nylon straps are provided on both sides of the left and right sides of the front center of the fertilizer storage barrel.

[0012] In one embodiment, a barrel end cover is sleeved and fixed on the outside of the top end of the metal barrel, a handle fixing sleeve is provided on the lower side of the barrel end cover, the handle fixing sleeve is sleeved and fixed on the outside of the metal barrel, and operating handles are welded on both ends of the handle fixing sleeve.

[0013] In one embodiment, a fertilization push rod is inserted at the center of the barrel end cover, and the fertilization push rod can move up and down in the barrel end cover. A fertilization handle is welded to the upper end of the fertilization push rod, and a reset spring is arranged between the fertilization handle and the barrel end cover, and the reset spring is sleeved on the outside of the fertilization push rod.

[0014] In one embodiment, a long cylinder plunger is connected to the bottom end of the fertilization push rod, and the long cylinder plunger is inserted into the metal barrel. The length of the long cylinder plunger is greater than the length of the quantitative fertilization barrel, and the fertilization push rod can drive the long cylinder plunger to move up and down in the metal barrel.

[0015] In one embodiment, a metal connecting rod is welded at the center of the bottom end of the long cylinder plunger, and a hemispherical material storage head is welded at the bottom end of the metal connecting rod. The spherical surface of the hemispherical material storage head is arched upward, and the diameter of the hemispherical material storage head is equal to the diameter of the long cylinder plunger.

[0016] Beneficial effects: The technical solution of the utility model is to add a novel fertilization depth limiting device to the quantitative fertilization cylinder and the outside of the metal barrel of the quantitative fertilization device for potato cultivation. The main part of the fertilization depth limiting device is fixed to the outside of the metal barrel by a plurality of metal fixing sleeves, and the device can mainly limit the depth of the quantitative fertilization cylinder inserted into the soil through a depth limiting plate, which can help farmers to accurately apply fertilizer to the soil at an optimal depth when fertilizing according to fertilization needs, so that the fertilization device can not only perform quantitative fertilization, but also accurately control the fertilization depth in the soil. Fertilizer quantitative addition and fertilization depth positioning can make the cultivated potatoes grow more vigorously, and the fertilization depth limiting device can adjust the limit depth of the quantitative fertilization cylinder inserted into the soil, so that the fertilization depth can be flexibly changed according to fertilization requirements and soil conditions, so that potatoes can be better cultivated on the land. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the overall plan structure of a quantitative fertilization device for potato cultivation according to the utility model;

[0019] Figure 2 It is a schematic plan view of the quantitative fertilization part of a quantitative fertilization device for potato cultivation of the utility model;

[0020] Figure 3 It is a schematic diagram of the internal planar structure of the metal barrel and the quantitative fertilizer application barrel of the utility model;

[0021] Figure 4 It is a schematic diagram of the external plane structure of the fertilization depth limiting device of the utility model;

[0022] Figure 5 It is a schematic diagram of the internal plane structure of the fertilization depth limiting device of the utility model.

[0023] The following are the descriptions of the reference numerals:

[0024] 1. Feeding port; 2. Sealing end cover; 3. Fertilizer storage barrel; 4. Nylon shoulder strap; 5. Discharge port; 6. Connecting sleeve; 7. Corrugated conveying pipe; 8. Quantitative fertilizer cylinder; 9. Fertilization depth limiting device; 10. Metal barrel; 11. Operating handle; 12. Handle fixing sleeve; 13. Reset spring; 14. Fertilization push rod; 15. Fertilization handle; 16. Barrel end cover; 17. Long cylinder plunger; 18. Metal connecting rod; 19. Hemispherical storage head; 20. Metal fixing sleeve; 21. Positioning nut A; 22. Connecting block; 23. Positioning nut B; 24. Foot plate; 25. Support screw; 26. Depth limiting plate; 27. Screw hole; 28. Movable sleeve hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0029] The utility model provides Figure 1-5 The device for quantitative fertilization for potato cultivation shown in the figure comprises a fertilizer storage barrel 3 and a discharge port 5 arranged at the center of the bottom end of the fertilizer storage barrel 3. A connecting sleeve 6 is fixedly connected to the outside of the discharge port 5. A corrugated conveying pipe 7 is connected to the bottom end of the connecting sleeve 6. A metal barrel 10 is connected to the right end of the corrugated conveying pipe 7, and the corrugated conveying pipe 7 is connected to the inside of the metal barrel 10. A quantitative fertilization barrel 8 is connected to the bottom end of the metal barrel 10. The quantitative fertilization barrel 8 is connected to the inside of the metal barrel 10. The bottom end of the quantitative fertilization barrel 8 is conically arranged. A feeding port 1 is arranged at the center of the top end of the fertilizer storage barrel 3. The top end of the feeding port 1 is opened with external threads. A sealing end cover 2 is sleeved, and nylon straps 4 are provided on both sides of the left and right sides of the front center of the fertilizer storage barrel 3. When using the quantitative fertilization device for potato cultivation, the sealing end cover 2 needs to be opened first, and then the fertilizer is put into the fertilizer storage barrel 3 for storage through the open feeding port 1. After the fertilizer storage barrel 3 is full of fertilizer, the sealing end cover 2 needs to be sealed to the outside of the opening of the feeding port 1 again, and then the connecting sleeve 6 on the corrugated conveying pipe 7 needs to be fixed to the outside of the discharge port 5 at the bottom end of the fertilizer storage barrel 3. Then the farmer needs to carry the fertilizer storage barrel 3 on his back through two nylon straps 4 and prepare for quantitative fertilization.

[0030] like Figure 1 , Figure 2and Figure 3 As shown, the bottom end of the fertilizer push rod 14 is connected to a long cylinder plunger 17, which is inserted into the metal barrel 10. The length of the long cylinder plunger 17 is greater than the length of the quantitative fertilizer barrel 8. The fertilizer push rod 14 can drive the long cylinder plunger 17 to move up and down in the metal barrel 10. A metal connecting rod 18 is welded at the center of the bottom end of the long cylinder plunger 17. A hemispherical storage head 19 is welded at the bottom end of the metal connecting rod 18. The spherical surface of the hemispherical storage head 19 is arched upward, and the diameter of the hemispherical storage head 19 is equal to the diameter of the long cylinder plunger 17. When preparing to fertilize, the farmer needs to grasp the operating handle 11. At this time, it is necessary to ensure that the metal barrel 10 and the quantitative fertilizer barrel 8 are vertically downward. In this state, the fertilizer stored in the fertilizer storage barrel 3 will be transported to the metal barrel 1 through the corrugated conveying pipe 7. 0 for storage, specifically, the return spring 13 is in an uncompressed state, at which time the long cylinder plunger 17 at the bottom end of the fertilization push rod 14 is inside the metal barrel 10, and the long cylinder plunger 17 is located on the upper side of the connection between the corrugated conveying tube 7 and the metal, and the corrugated conveying tube 7 can smoothly convey the fertilizer into the metal barrel 10, because the bottom end of the long cylinder plunger 17 is connected with a hemispherical storage head 19 through a metal connecting rod, so the fertilizer will be conveyed to the area between the long cylinder plunger 17 and the hemispherical storage head 19 until the fertilizer is filled in the area between the long cylinder plunger 17 and the hemispherical storage head 19, so that the fertilizer filled in the area between the long cylinder plunger 17 and the hemispherical storage head 19 can be fertilized into the land each time fertilization is applied, thereby achieving the purpose of quantitative fertilization.

[0031] like Figure 1 , Figure 2 and Figure 3As shown, a barrel end cover 16 is sleeved and fixed on the outside of the top of the metal barrel 10, and a handle fixing sleeve 12 is arranged on the lower side of the barrel end cover 16. The handle fixing sleeve 12 is sleeved and fixed on the outside of the metal barrel 10. Operating handles 11 are welded on both ends of the handle fixing sleeve 12. A fertilizer push rod 14 is inserted at the center of the barrel end cover 16. The fertilizer push rod 14 can move up and down in the barrel end cover 16. A fertilizer handle 15 is welded on the upper end of the fertilizer push rod 14. A reset spring 13 is arranged between the fertilizer handle 15 and the barrel end cover 16. The reset spring 13 is sleeved on the outside of the fertilizer push rod 14. When fertilizing, the farmer needs to hold the two operating handles with both hands respectively. 11, then the bottom end of the quantitative fertilizer cylinder 8 is brought into contact with the land that needs to be fertilized, and then the farmer needs to put his foot on the foot pedal 24, and then press the foot downward to push the quantitative fertilizer cylinder 8 into the land through the foot pedal 24, and then the farmer needs to hold the fertilization handle 15 with his hand and press it down to the lowest height. At this time, the reset spring 13 is fully compressed, and at the same time, when the fertilization handle 15 is pressed down, the long cylinder plunger 17 will be pushed downward through the fertilization push rod 14, and the long cylinder plunger 17 will drive the hemispherical storage head 19 to move downward through the metal connecting rod 18. After being pressed down to the lowest height, the bottom end of the long cylinder plunger 17 is flush with the bottom end of the metal barrel 10, and The metal connecting rod 18 and the hemispherical storage head 19 are pressed into the quantitative fertilizer cylinder 8. Because the inner diameter of the quantitative fertilizer cylinder 8 is much larger than the inner diameter of the metal cylinder 10, the fertilizer retained between the hemispherical storage head 19 and the long cylinder plunger 17 will quickly fall into the quantitative fertilizer cylinder 8. Then the quantitative fertilizer cylinder 8 is pulled upward, and the fertilizer scattered inside the quantitative fertilizer cylinder 8 will be injected into the land. After the quantitative fertilizer cylinder 8 is completely pulled out, the fertilization handle 15 is released, and the reset spring 13 pushes the fertilization handle 15 upward, so that the fertilization push rod 14 drives the long cylinder plunger 17 upward to reset, so that the corrugated conveying tube 7 can re-load the fertilizer. It is transported to the area between the long cylinder plunger 17 and the hemispherical storage head 19, so as to achieve the purpose of quantitative fertilization, and when the fertilization push rod 14 drives the long cylinder plunger 17 to push down to fertilize, because the length of the long cylinder plunger 17 is greater than the length of the quantitative fertilization tube 8, the long cylinder plunger 17 will be blocked between the connection between the corrugated conveying tube 7 and the metal barrel 10 during fertilization, so as to ensure that there will be no leakage and excessive fertilization during the fertilization process, and when the long cylinder plunger 17 is reset upward, it will leave the connection area between the corrugated conveying tube 7 and the metal barrel 10, so as to ensure that the fertilizer can be normally transported to the area between the long cylinder plunger 17 and the hemispherical storage head 19.

[0032] like Figure 1 , Figure 4 and Figure 5As shown, a fertilization depth limiting device 9 is arranged on the lower outer side of the center of the metal barrel 10, and the fertilization depth limiting device 9 includes a metal fixing sleeve 20, a connecting block 22, a support screw 25 and a screw through hole 27. A plurality of metal fixing sleeves 20 are arranged, and the plurality of metal fixing sleeves 20 are sleeved and fixed on the lower outer side of the center of the metal barrel 10. The right ends of the plurality of metal fixing sleeves 20 are connected to the connecting block 22, and the connecting block 22 is provided with a screw through hole 27. The support screw 25 is inserted in the screw through hole 27, and the support screw 25 can move up and down in the screw through hole 27. A foot plate 24 is welded on the right end of the lower side of the center of the connecting block 22. When the foot plate 24 is welded, the support screw 25 can move up and down in the screw through hole 27. When the bottom end of the quantitative fertilizer application cylinder 8 is attached to the land that needs to be fertilized, the quantitative fertilizer application cylinder 8 needs to be inserted into the land before fertilization can be carried out. In order to save time and effort when inserting the quantitative fertilizer application cylinder 8 into the land, it is necessary to insert the quantitative fertilizer application cylinder 8 into the land by stepping on the foot plate 24, so as to achieve the purpose of saving time and effort. Specifically, the bottom end of the quantitative fertilizer application cylinder 8 needs to contact the ground and be vertical, and then the farmer needs to step on the foot plate 24, and then press down with the foot, so that the quantitative fertilizer application cylinder 8 will be pressed into the land through the foot plate 24, and then fertilization can be carried out through the quantitative fertilizer application cylinder 8.

[0033] like Figure 1 , Figure 4 and Figure 5 As shown, the fertilization depth limiting device 9 also includes a depth limiting plate 26 and a movable sleeve hole 28. The movable sleeve hole 28 is provided inside the depth limiting plate 26, and the depth limiting plate 26 is sleeved on the outside of the quantitative fertilization cylinder 8 through the movable sleeve hole 28. The depth limiting plate 26 can move up and down on the outside of the quantitative fertilization cylinder 8 through the movable sleeve hole 28. The bottom end of the support screw 25 is fixedly connected to the depth limiting plate 26 by welding. The support screw 25 can drive the depth limiting plate 26 to move up and down, and the travel of the support screw 25 to drive the depth limiting plate 26 to move up and down is greater than the length of the quantitative fertilization cylinder 8. The depth limiting plate 26 is an aluminum alloy circular metal plate. The fertilization depth limiting device 9 also includes a positioning nut A21, a positioning nut B23 and a foot plate 24. The positioning nut A21 and the positioning nut B23 are both threadedly sleeved on the outside of the support screw 25, and the positioning nut A21 and the positioning nut B23 are respectively located at the upper and lower ends of the connecting block 22.

[0034] like Figure 1 , Figure 4 and Figure 5As shown, the outer diameters of the positioning nut A21 and the positioning nut B23 are both larger than the diameter of the screw through hole 27. The positioning nut A21 and the positioning nut B23 can be rotated clockwise or counterclockwise to move up and down on the outside of the support screw 25 through the threaded action. When it is necessary to limit the insertion depth of the quantitative fertilizer tube 8 into the soil for fertilization, it is necessary to limit the insertion depth of the quantitative fertilizer tube 8 into the soil through the fertilization depth limiting device 9 to control the insertion depth of the quantitative fertilizer tube 8 into the soil to half of its own length. At this time, it is necessary to rotate the positioning nut A21 and the positioning nut B23 so that the positioning nut A21 and the positioning nut B23 can move upward and downward on the outside of the support screw 25 respectively, and then it is necessary to push the support screw 25 upward or downward, and the support screw 25 can move up and down through the screw through hole 27, which will make the support screw 2 5 drives the depth limiting plate 26 at the bottom to move up and down outside the quantitative fertilization tube 8. When the outer wall of the bottom end of the depth limiting plate 26 is at the center of the quantitative fertilization tube 8, the height is maintained and the positioning nut A21 and the positioning nut B23 are re-tightened, so that the positioning nut A21 moves downward and the positioning nut B23 moves upward, until the positioning nut A21 and the positioning nut B23 are clamped at the upper and lower ends of the connecting block 22 respectively, so that the position of the support screw 25 is fixed firmly. When the support screw 25 is fixed, the depth limiting plate 26 is fixed synchronously. When the quantitative fertilization tube 8 is inserted into the soil, it will continue to be inserted. When the insertion depth of the quantitative fertilization tube 8 reaches half of its own length, the depth limiting plate 26 will block the surface of the soil, thereby preventing the quantitative fertilization tube 8 from continuing to penetrate into the soil, thereby achieving the purpose of controlling the fertilization depth.

[0035] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A quantitative fertilization device for potato cultivation, comprising a fertilizer storage barrel (3) and a discharge port (5) arranged at the center of the bottom end of the fertilizer storage barrel (3), the discharge port (5) is sleeved and fixed with a connecting sleeve (6) on the outside, the bottom end of the connecting sleeve (6) is connected to a corrugated conveying pipe (7), the right end of the corrugated conveying pipe (7) is connected to a metal barrel (10), and the corrugated conveying pipe (7) is communicated with the inside of the metal barrel (10), characterized in that: The bottom end of the metal barrel (10) is connected to a quantitative fertilization barrel (8), the quantitative fertilization barrel (8) and the inside of the metal barrel (10) are in communication with each other, the bottom end of the quantitative fertilization barrel (8) is conical, and a fertilization depth limiting device (9) is provided on the outside of the lower side of the center of the metal barrel (10); The fertilization depth limiting device (9) comprises a metal fixing sleeve (20), a connecting block (22), a supporting screw rod (25) and a screw rod through hole (27). The metal fixing sleeve (20) is provided in plurality, and the plurality of metal fixing sleeves (20) are all sleeved and fixed on the lower outer side of the center of the metal barrel (10). The right ends of the plurality of metal fixing sleeves (20) are connected to the connecting block (22), and the connecting block (22) is provided with a screw rod through hole (27). The supporting screw rod (25) is inserted into the screw rod through hole (27), and the supporting screw rod (25) can move up and down in the screw rod through hole (27).

2. The quantitative fertilization device for potato cultivation according to claim 1, characterized in that: The fertilization depth limiting device (9) further comprises a depth limiting plate (26) and a movable sleeve hole (28); the depth limiting plate (26) is provided with a movable sleeve hole (28) inside, and the depth limiting plate (26) is sleeved on the outside of the quantitative fertilization cylinder (8) through the movable sleeve hole (28); the depth limiting plate (26) can move up and down outside the quantitative fertilization cylinder (8) through the movable sleeve hole (28); and the bottom end of the support screw (25) is fixedly connected to the depth limiting plate (26) by welding.

3. The quantitative fertilization device for potato cultivation according to claim 2, characterized in that: The support screw (25) can drive the depth limiting plate (26) to move up and down, and the travel of the support screw (25) to drive the depth limiting plate (26) to move up and down is greater than the length of the quantitative fertilization cylinder (8), and the depth limiting plate (26) is an aluminum alloy circular metal plate.

4. The quantitative fertilization device for potato cultivation according to claim 3, characterized in that: The fertilization depth limiting device (9) further comprises a positioning nut A (21), a positioning nut B (23) and a pedal plate (24), wherein the positioning nut A (21) and the positioning nut B (23) are both threadedly sleeved on the outside of the support screw rod (25), and the positioning nut A (21) and the positioning nut B (23) are respectively located at the upper and lower ends of the connecting block (22), and the pedal plate (24) is welded to the lower right end of the center of the connecting block (22).

5. The quantitative fertilization device for potato cultivation according to claim 4, characterized in that: The outer diameters of the positioning nut A (21) and the positioning nut B (23) are both larger than the diameter of the screw rod through hole (27). The positioning nut A (21) and the positioning nut B (23) can move up and down on the outside of the support screw rod (25) through the action of the threads when rotating clockwise or counterclockwise.

6. The quantitative fertilization device for potato cultivation according to claim 1, characterized in that: A feeding port (1) is arranged at the center of the top end of the fertilizer storage barrel (3); a sealing end cover (2) is threadedly sleeved on the outer surface of the top opening of the feeding port (1); and nylon straps (4) are arranged on both sides of the center of the front end of the fertilizer storage barrel (3).

7. The quantitative fertilization device for potato cultivation according to claim 1, characterized in that: A barrel end cover (16) is sleeved and fixed to the outside of the top end of the metal barrel (10), and a handle fixing sleeve (12) is provided on the lower side of the barrel end cover (16). The handle fixing sleeve (12) is sleeved and fixed to the outside of the metal barrel (10), and operating handles (11) are welded to both left and right ends of the handle fixing sleeve (12).

8. The quantitative fertilization device for potato cultivation according to claim 7, characterized in that: A fertilizing push rod (14) is inserted at the center of the barrel end cover (16), and the fertilizing push rod (14) can move up and down in the barrel end cover (16). A fertilizing handle (15) is welded to the upper end of the fertilizing push rod (14), and a return spring (13) is arranged between the fertilizing handle (15) and the barrel end cover (16), and the return spring (13) is sleeved on the outside of the fertilizing push rod (14).

9. The quantitative fertilization device for potato cultivation according to claim 8, characterized in that: The bottom end of the fertilizing push rod (14) is connected to a long-barrel plunger (17), which is inserted into the metal barrel (10). The length of the long-barrel plunger (17) is greater than the length of the quantitative fertilizing barrel (8), and the fertilizing push rod (14) can drive the long-barrel plunger (17) to move up and down in the metal barrel (10).

10. The quantitative fertilizer application device for potato cultivation according to claim 9, characterized in that: A metal connecting rod (18) is welded at the center of the bottom end of the long-cylinder plunger (17), and a hemispherical material storage head (19) is welded at the bottom end of the metal connecting rod (18). The spherical surface of the hemispherical material storage head (19) is arched upward, and the diameter of the hemispherical material storage head (19) is equal to the diameter of the long-cylinder plunger (17).

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