A resistance-reducing injection fertilizer applicator and its working method

Abstract

The present invention provides a resistance-reducing injection fertilizer applicator and a working method thereof, comprising a machine body, a lowering cylinder, a moving plate, a fertilizer rod, a fertilizer cylinder and a fertilizer storage box, wherein the lowering cylinder is fixedly connected to the machine body, the moving plate is fixedly connected to the protruding end of the lowering cylinder, a plurality of fertilizer rods are fixedly connected to the bottom end surface of the moving plate at intervals, a plurality of fertilizer cylinders are fixedly connected to the top end surface of the moving plate at intervals, and the fertilizer storage box is fixedly connected to the machine body, wherein a fertilizer cavity is provided in the fertilizer rod, a fertilizer outlet is provided in the fertilizer rod at the bottom of the fertilizer cavity, a plurality of drainage pipes are fixedly connected to the bottom of the fertilizer storage box and communicate with the fertilizer cavity, a sealing plate is slidably connected to one side of the fertilizer rod, the sealing plate covers the fertilizer outlet, the drainage pipe is fixedly connected to the sealing plate, a soil resistance plate is fixedly connected to the bottom of the sealing plate, and the bottom area of ​​the soil resistance plate is larger than the bottom area of ​​the sealing plate. The present invention has the advantage of avoiding trenching for automatic fertilization.

Description

Technical Field

[0001] The invention relates to the field of agricultural machinery and equipment, in particular to a drag-reducing injection fertilizer applicator and a working method thereof. Background Art

[0002] In order to achieve sustainable and stable development of agricultural resources, protect land resources, avoid soil erosion, and reduce soil disturbance caused by agricultural machinery, no-till seeding technology has been continuously improved and promoted since the end of the 20th century. The furrow opener is a key working component of the no-till seeding machine. The working surface of the traditional furrow opener often adheres to the soil during the furrowing operation, which changes its working trajectory, resulting in increased traction resistance and the shape of the furrows opened is difficult to meet the operation requirements, affecting the emergence rate of crops. At the same time, the fertilization technology is backward and the amount of fertilizer is large, which can easily cause problems such as poor soil water retention capacity after operation, seed burning in the early stage and fertilizer loss in the later stage. Summary of the invention

[0003] In order to solve the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a resistance-reducing injection fertilizer applicator and a working method thereof, so as to overcome the defects in the prior art.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a resistance-reducing injection fertilizer applicator and a working method thereof, comprising a machine body, a lowering cylinder, a movable plate, a fertilizer rod, a fertilizer cylinder and a fertilizer storage box, wherein the lowering cylinder is fixedly connected to the machine body, the movable plate is fixedly connected to the protruding end of the lowering cylinder, a plurality of fertilizer rods are fixedly connected to the bottom end surface of the movable plate at intervals, a plurality of fertilizer cylinders are fixedly connected to the top end surface of the movable plate at intervals, and the fertilizer storage box is fixedly connected to the machine body, wherein a fertilizer cavity is provided in the fertilizer rod, a fertilizer outlet is provided in the fertilizer rod at the bottom of the fertilizer cavity, a plurality of drainage pipes are fixedly connected to the bottom of the fertilizer storage box and communicate with the fertilizer cavity, a sealing plate is slidably connected to one side of the fertilizer rod, the sealing plate covers the fertilizer outlet, the drainage pipe is fixedly connected to the sealing plate, a soil resistance plate is fixedly connected to the bottom of the sealing plate, and the bottom area of ​​the soil resistance plate is larger than the bottom area of ​​the sealing plate.

[0005] As a further illustration of the present invention, preferably, a spring is fixedly connected between the sealing plate and the fertilizing rod, and the spring pushes the sealing plate to move downward to close the fertilizer outlet.

[0006] As a further illustration of the present invention, preferably, a baffle is fixedly connected outside the abutment interface between the drainage tube and the fertilizing rod, and the cross-sectional area of ​​the baffle is larger than the cross-sectional area of ​​the drainage tube.

[0007] As a further explanation of the present invention, preferably, the fertilization rod is in the shape of a triangular prism, and a triangular pyramid-shaped plug is fixedly connected to the bottom of the fertilization rod. The minimum plane angle of the plug is between 10° and 35°, and the directions of the minimum plane angles of the fertilization rod and the plug both point in the direction of travel of the fertilizer applicator.

[0008] As a further illustration of the present invention, preferably, a fertilization column is fixedly connected to the extended end of the fertilization cylinder, and the fertilization column is slidably connected in the fertilization cavity, and the outer diameter of the fertilization column is the same as the inner diameter of the fertilization cavity.

[0009] As a further illustration of the present invention, preferably, the length of the fertilization column is less than the distance between the fertilizer outlet and the top of the fertilization chamber.

[0010] As a further illustration of the present invention, preferably, a triangular material guide plate is fixedly connected to the bottom of the fertilizer storage box between adjacent drainage pipes, and the inclined surface of the material guide plate points to the drainage pipe.

[0011] As a further illustration of the present invention, preferably, a connecting plate is fixedly connected to one side of the machine body, a connecting hole is opened on the connecting plate, a limiting plate is fixedly connected to the bottom of the connecting plate, and the length direction of the limiting plate is perpendicular to the length direction of the connecting plate.

[0012] The present invention also provides a working method of a resistance-reducing injection-type fertilizer applicator, comprising the following steps:

[0013] Ⅰ. Before fertilizing, the machine body is mounted on the tractor through the connecting plate and the limit plate, and the fertilizer is poured into the fertilizer storage box, and the fertilizer flows from the drainage pipe to the fertilizing chamber;

[0014] Ⅱ. When applying fertilizer, the tractor starts to move, the cylinder is extended, and the plug is embedded in the soil;

[0015] Ⅲ. When the plug is inserted into the ground, the soil plate contacts the ground, and the cylinder is lowered and extended to move the sealing plate upward until the fertilizer outlet is embedded in the ground;

[0016] IV. After the fertilizer outlet is embedded in the ground, the fertilizer cylinder extends out and uses air pressure to press the fertilizer out of the fertilizer outlet;

[0017] Ⅴ. After fertilization is completed, the lower cylinder contracts to keep the fertilization rod and the plug away from the ground. At the same time, the sealing plate and the soil-proof plate are automatically reset under the action of the spring, and the fertilization is completed.

[0018] As a further illustration of the present invention, preferably, after the sealing plate and the soil-resisting plate are completely reset, the drainage tube is connected to the fertilization chamber for the second time, the fertilization cylinder contracts, and after the fertilization column passes through the drainage tube opening, the fertilization column continues to reset, so that the fertilizer flows into the fertilization chamber.

[0019] The present invention has the following beneficial effects:

[0020] 1. The present invention combines the sealing plate and the drainage tube into one, so as to realize automatic fertilization, sealing, material suction and other operations during the fertilization process, and has high repeatability, no electronic equipment control, simple structure, low failure rate and strong practicality;

[0021] 2. By setting the fertilizer rod into a triangular prism shape and a triangular pyramid-shaped plug, not only can the resistance of the fertilizer applicator during fertilization be reduced, but also the fertilizer rod can be inserted into the soil more easily, ensuring that the fertilization work is carried out efficiently without omission;

[0022] 3. By setting the guide plate, the fertilizer will automatically flow to the drainage pipe, so that the fertilizer in the fertilizer storage box can be completely applied to the land, thus improving the fertilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the front view of the general assembly of the present invention;

[0024] Figure 2 is a bottom view of the general assembly of the present invention;

[0025] Figure 3 It is a rear view of the final assembly of the present invention;

[0026] Figure 4 yes Figure 3 A magnified view of middle;

[0027] Figure 5 is a cross-sectional view of a fertilizing rod of the present invention;

[0028] Figure 6 is a cross-sectional view of a drainage tube of the present invention;

[0029] Figure 7 It is a cross-sectional view of a fertilizer storage box of the present invention;

[0030] Figure 8 is another side view of a fertilizer application rod of the present invention;

[0031] Fig. 9 is a rear view of another fertilizing rod of the present invention;

[0032] Fig.10 It is a partial cross-sectional view of another type of fertilizing rod of the present invention.

[0033] Description of reference numerals:

[0034] 1. Machine body; 11. Connecting plate; 12. Limiting plate; 2. Lowering cylinder; 3. Moving plate; 4. Fertilizing rod; 41. Plug; 42. Sealing plate; 43. Soil-resisting plate; 44. Spring; 45. Fertilizing chamber; 46. Steel rope; 5. Fertilizing cylinder; 51. Fertilizing column; 6. Fertilizer storage box; 61. Guide plate; 62. Drainage pipe; 63. Baffle. DETAILED DESCRIPTION

[0035] In order to further understand the structure, features and other purposes of the present invention, the preferred embodiments are described in detail with reference to the accompanying drawings as follows. The embodiments described in the drawings are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention.

[0036] A drag-reducing injection fertilizer applicator, combined with Figure 1 , Figure 3 , including a body 1, a lowering cylinder 2, a moving plate 3, a fertilizing rod 4, a fertilizing cylinder 5 and a fertilizer storage box 6. The body 1 is a rectangular parallelepiped frame, the lowering cylinder 2 is fixedly connected to the top surface of the body 1, the telescopic direction of the lower cylinder 2 is vertical, the moving plate 3 is fixedly connected to the protruding end of the lowering cylinder 2, a plurality of fertilizing rods 4 are fixedly connected to the bottom end surface of the moving plate 3 at intervals, a plurality of fertilizing cylinders 5 are fixedly connected to the top surface of the moving plate 3 at intervals, the telescopic direction of the fertilizing cylinder 5 is vertical, and the fertilizer storage box 6 is fixedly connected to the body 1.

[0037] Combination Figure 1 , Figure 2 , connecting plates 11 are welded on both sides of the front end surface of the body 1, the length direction of the connecting plate 11 is vertical, and a circular connecting hole is opened on the connecting plate 11, which can be connected to the tractor by inserting a large bolt into the connecting hole, so that the body 1 can be mounted on the tractor; the bottom of the connecting plate 11 is fixedly connected to a limiting plate 12, the length direction of the limiting plate 12 is perpendicular to the length direction of the connecting plate 11, and the length direction of the limiting plate 12 is away from the body 1; the limiting plate 12 is arranged to be inserted into the corresponding mounting hole at the rear of the tractor, and cooperates with the large bolts on the connecting plate 11 to stabilize the position of the body 1, prevent the body 1 from swinging up and down, and ensure the accurate fertilization position of the fertilizer spreader.

[0038] Combination Figure 1 , Figure 5 , two lower cylinders 2 are spaced apart along the length direction of the machine body 1, the moving plate 3 is a flat rectangular steel plate, a plurality of fertilizing rods 4 are distributed along the length direction of the moving plate 3, and the spacing between adjacent fertilizing rods 4 is the spacing required for fertilization; combined Figure 2 The fertilizing rod 4 is in the shape of a triangular prism, and a triangular pyramid-shaped plug 41 is fixedly connected to the bottom of the fertilizing rod 4. The minimum plane angle of the plug 41 is between 10° and 35°, and the directions of the minimum plane angles of the fertilizing rod 4 and the plug 41 both point to the moving direction of the fertilizer applicator; setting the fertilizing rod 4 in the shape of a triangular prism and setting the triangular pyramid-shaped plug 41 can not only reduce the moving resistance of the fertilizer applicator during fertilization, but also make the fertilizing rod 4 easier to insert into the soil, thereby ensuring that the fertilization work is carried out efficiently without omission.

[0039] Combination Figure 4 , Figure 5, a cylindrical fertilization chamber 45 is provided in the fertilization rod 4, and a fertilizer outlet is provided at the bottom of the plane away from the traveling direction of the fertilization rod 4, and the fertilizer outlet is communicated with the bottom of the fertilization chamber 45, and an inclined surface is provided at the junction of the fertilization chamber 45 and the fertilizer outlet, so that the fertilizer can flow to the fertilizer outlet; a fertilization column 51 is fixedly connected to the extended end of the fertilization cylinder 5, and the fertilization column 51 is slidably connected in the fertilization chamber 45, and the outer diameter of the fertilization column 51 is the same as the inner cavity of the fertilization chamber 45; when fertilizing, the fertilization rod 4 is inserted into the soil until the fertilizer outlet is also inserted under the ground, and the fertilizer stored in the fertilization chamber 45 can automatically flow out from the fertilizer outlet under the action of gravity, so as to realize the fertilization work, and the fertilization cylinder 5 is extended at the same time, so that the fertilization column 51 moves downward, and the fertilizer can be pushed out of the fertilization chamber 45 by air pressure or contact with the fertilizer, so as to avoid clogging the fertilization chamber 45 when the fertilizer moves downward, and ensure the normal fertilization work.

[0040] Combination Figure 4 , Figure 6 A plurality of drainage tubes 62 are fixedly connected to the bottom of the fertilizer storage box 6. The drainage tubes 62 are metal hoses and the number is the same as that of the fertilizing rod 4. One end of the drainage tube 62 is communicated with the fertilizer storage box 6, and the other end of the drainage tube 62 abuts against the middle part of the fertilizing rod 4. A fertilizer inlet is opened in the middle part of the fertilizing rod 4, and the drainage tube 62 is communicated with the fertilizing chamber 45 through the fertilizer inlet; the fertilizing rod 4 is slidably connected with a sealing plate 42 on one side of the fertilizer outlet, and the sealing plate 42 can cover the fertilizer outlet. A spring 44 is fixedly connected between the middle part of the sealing plate 42 and the fertilizing rod 4, and the spring 44 pushes the sealing plate 42 to move downward to close the fertilizer outlet; one end of the drainage tube 62 abutting against the fertilizing rod 4 is fixedly connected to both sides of the sealing plate 42, and a soil-proof plate 43 is fixedly connected to the bottom of the sealing plate 42, and the bottom area of ​​the soil-proof plate 43 is larger than the bottom area of ​​the sealing plate 42.

[0041] Combination Figure 4 , Figure 6 , the fertilizer storage box 6 and the drainage pipe 62 are provided to continuously transport fertilizer to the fertilization chamber 45, so that the fertilizer applicator can carry out long-term and large-area fertilization work; the sealing plate 42 is provided to prevent the fertilizer from flowing out of the fertilizer outlet when no fertilizer is applied under the action of the spring 44, and when fertilizing, the fertilizing rod 4 is inserted into the ground, and the soil-proof plate 43 cannot be inserted into the ground due to the large contact area with the ground. The fertilizing rod 4 continues to move downward, and the soil-proof plate 43 drives the sealing plate 42 and the fertilizing rod 4 to produce relative movement, that is, the sealing plate 42 and the soil-proof plate 43 move upward relative to the fertilizing rod 4. At this time, the fertilizer outlet is exposed, and the fertilizer flows into the ground under the dual action of gravity and the fertilization column to complete the fertilization work.

[0042] Combination Figure 8 , Fig. 9 and Fig.10The present invention also provides a fertilizing rod 4 with a steel rope 46, the sliding direction of the sealing plate 42 on the fertilizing rod 4 is inclined, and the inclined direction is away from the moving direction of the fertilizing rod 4; one side of the top of the sealing plate 42 is fixedly connected to one end of the steel rope 46, and the other end of the steel rope 46 is fixedly connected to the machine body 1; two springs 44 are fixedly connected to the fertilizing rod 4 on both sides of the fertilizing cavity 45, and the sealing plate 42 abuts against the bottom of the spring 44, so that the spring 44 pushes the sealing plate 42 downward to the sealing plate fertilizing cavity 45. When fertilizing, the fertilizing rod 4 and the sealing plate 42 move downward at the same time and are inserted into the ground. After the steel rope 46 is tightened, the sealing plate 42 does not move under the restriction of the steel rope 46, and the sealing plate 42 and the fertilizing rod 4 produce relative movement, the spring 44 is compressed, and the fertilizing cavity 45 is exposed, so that the fertilizer can flow out. Using this method, soil can be prevented from entering the fertilizing cavity 45 and blocking the fertilizing cavity 45, affecting fertilization.

[0043] Combination Figure 4 , Figure 6 The bottom of the fertilizer storage box 6 is located between adjacent drainage tubes 62 and is fixedly connected with a triangular guide plate 61. The inclined surface of the guide plate 61 points to the drainage tube 62, so that the fertilizer automatically flows to the drainage tube 62, and the fertilizer in the fertilizer storage box 6 can be completely applied to the land, thereby improving the fertilization efficiency; a square baffle 63 is fixedly connected to the outside of the abutment interface between the drainage tube 62 and the fertilization rod 4, and the baffle 63 also abuts against the sealing plate 42. The cross-sectional area of ​​the baffle 63 is larger than the cross-sectional area of ​​the drainage tube 62, and the baffle 63 abuts against the fertilization rod 4; when the sealing plate 42 moves up, the drainage tube 62 is misaligned with the fertilizer inlet, and the fertilizer cannot enter the fertilizer chamber 45, thereby realizing quantitative fertilization. When the sealing plate 42 is reset, the drainage tube 62 is communicated with the fertilizer chamber 45, so that the fertilizer can flow into the fertilizer chamber 45 under the action of gravity, thereby realizing the function of automatic fertilizer replenishment.

[0044] Combination Figure 4 , Figure 5 , the length of the fertilization column 51 is less than the distance between the fertilizer outlet and the top of the fertilization chamber 45; when the sealing plate 42 is reset, the fertilization cylinder 5 contracts and the fertilization column 51 moves up. Because the fertilizer outlet is closed by the sealing plate 42, a negative pressure environment is formed in the fertilization chamber 45. At this time, after the fertilization column passes through the fertilizer inlet, the negative pressure environment in the fertilization chamber 45 will also cause the fertilizer in the drainage tube 62 to be sucked into the fertilization chamber 45, thereby allowing the fertilizer to enter the fertilization chamber 45 faster and easier, thereby achieving the effect of automatic feeding. The fertilization column 51 can not only achieve fertilization but also play a role in feeding, killing two birds with one stone; and the baffle 63 can reduce the probability of external gas flowing into the gap between the drainage tube 62 and the fertilization rod 4, so that only air can flow into the fertilization chamber 45 from the fertilizer storage box 6, further improving the feeding efficiency.

[0045] The present invention also provides a working method of a resistance-reducing injection-type fertilizer applicator, comprising the following steps:

[0046] Ⅰ. Before fertilizing, the machine body 1 is mounted on the tractor through the connecting plate 11 and the limit plate 12, and the fertilizer is poured into the fertilizer storage box 6, and the fertilizer flows from the drainage pipe 62 to the fertilization chamber 45;

[0047] Ⅱ. When applying fertilizer, the tractor starts to move, the cylinder 2 is extended, and the plug 41 is embedded in the land;

[0048] III. When the plug 41 is inserted into the ground, the soil plate 43 contacts the ground, and the lowering cylinder 2 continues to extend, so that the sealing plate 42 moves up until the fertilizer outlet is embedded in the ground;

[0049] IV. After the fertilizer outlet is embedded in the ground, the fertilization cylinder 5 is extended, and the fertilizer is pressed out of the fertilizer outlet by air pressure;

[0050] V. After the fertilization is completed, the lowering cylinder 2 contracts, so that the fertilization rod 4 and the plug 41 are away from the ground, and at the same time, the sealing plate 42 and the soil-proof plate 43 are automatically reset under the action of the spring 44, and the fertilization is completed.

[0051] VI. After the sealing plate 42 and the soil-repelling plate 43 are completely restored, the drainage tube 62 is connected to the fertilization chamber 45 for the second time, the fertilization cylinder 5 contracts, and the fertilization column 51 passes through the opening of the drainage tube 62. The fertilization column 51 continues to be restored, so that the fertilizer flows into the fertilization chamber 6 under the gravity and the gas pressure in the fertilizer storage box 6; then, the next fertilization work can be carried out under the driving of the tractor.

[0052] In summary, the present invention combines the sealing plate 42 and the drainage tube 62 into one, thereby realizing automatic fertilization, sealing, material suction and other tasks during the fertilization process, with high repeatability, no need for any electronic equipment control, simple structure, low failure rate, and extremely strong practicality.

[0053] It should be noted that the above invention content and specific implementation methods are intended to demonstrate the practical application of the technical solution provided by the present invention and should not be interpreted as limiting the scope of protection of the present invention. Those skilled in the art can make various modifications, equivalent substitutions or improvements within the spirit and principles of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A drag-reducing injection fertilizer applicator, characterized in that: The fertilizer storage box (6) comprises a machine body (1), a lowering cylinder (2), a movable plate (3), a fertilizer rod (4), a fertilizer cylinder (5) and a fertilizer storage box (6), wherein the lowering cylinder (2) is fixedly connected to the machine body (1), the movable plate (3) is fixedly connected to the protruding end of the lowering cylinder (2), a plurality of fertilizer rods (4) are fixedly connected to the bottom end surface of the movable plate (3) at intervals, a plurality of fertilizer cylinders (5) are fixedly connected to the top end surface of the movable plate (3) at intervals, and the fertilizer storage box (6) is fixedly connected to the machine body (1), wherein: A fertilizing chamber (45) is formed in the fertilizing rod (4), and a fertilizing column (51) is fixedly connected to the protruding end of the fertilizing cylinder (5). The fertilizing column (51) is slidably connected in the fertilizing chamber (45), and the outer diameter of the fertilizing column (51) is the same as the inner cavity of the fertilizing chamber (45); a fertilizer outlet is formed in the fertilizing rod (4) at the bottom of the fertilizing chamber (45), and a plurality of drainage pipes (62) are fixedly connected to the bottom of the fertilizer storage box (6) and communicated with the fertilizing chamber (45). When the fertilizing column (51) moves downward, the fertilizer is pushed out of the fertilizing chamber (45) by air pressure or contact with the fertilizer; (4) A sealing plate (42) is slidably connected to one side, a spring (44) is fixedly connected between the sealing plate (42) and the fertilizing rod (4), and the spring (44) pushes the sealing plate (42) to move downward to close and cover the fertilizer outlet; the drainage pipe (62) is fixedly connected to the sealing plate (42), and a soil-resisting plate (43) is fixedly connected to the bottom of the sealing plate (42), and the bottom area of ​​the soil-resisting plate (43) is larger than the bottom area of ​​the sealing plate (42); the sliding direction of the sealing plate (42) is vertical or inclined, wherein the inclined direction is away from the moving direction of the fertilizing rod (4).

2. The drag-reducing injection fertilizer applicator according to claim 1, characterized in that: A baffle (63) is fixedly connected outside the abutment interface between the drainage tube (62) and the fertilizing rod (4), and the cross-sectional area of ​​the baffle (63) is larger than the cross-sectional area of ​​the drainage tube (62).

3. The drag-reducing injection fertilizer applicator according to claim 1, characterized in that: The fertilizing rod (4) is in the shape of a triangular prism, and a triangular pyramid-shaped plug (41) is fixedly connected to the bottom of the fertilizing rod (4). The minimum plane angle of the plug (41) is between 10° and 35°, and the direction of the minimum plane angle between the fertilizing rod (4) and the plug (41) both points to the direction of travel of the fertilizer applicator.

4. The drag-reducing injection fertilizer applicator according to claim 1, characterized in that: The length of the fertilization column (51) is less than the distance between the fertilizer outlet and the top of the fertilization chamber (45).

5. The drag-reducing injection fertilizer applicator according to claim 1, characterized in that: A triangular material guide plate (61) is fixedly connected between adjacent drainage pipes (62) at the bottom of the fertilizer storage box (6), and the inclined surface of the material guide plate (61) points toward the drainage pipe (62).

6. The drag-reducing injection fertilizer applicator according to claim 3, characterized in that: A connecting plate (11) is fixedly connected to one side of the machine body (1), a connecting hole is provided on the connecting plate (11), a limiting plate (12) is fixedly connected to the bottom of the connecting plate (11), and the length direction of the limiting plate (12) is perpendicular to the length direction of the connecting plate (11).

7. The working method of the drag-reducing injection fertilizer applicator according to claim 6, characterized in that: The following steps are involved: Ⅰ. Before fertilizing, the machine body (1) is mounted on the tractor through the connecting plate (11) and the limit plate (12), and the fertilizer is poured into the fertilizer storage box (6), and the fertilizer flows from the drainage pipe (62) into the fertilizing chamber (45); Ⅱ. When applying fertilizer, the tractor starts to move, the cylinder (2) is extended, and the plug (41) is embedded in the soil; Ⅲ. When the plug (41) is inserted into the ground, the soil plate (43) contacts the ground, and the cylinder (2) is lowered and extended, so that the sealing plate (42) moves upward until the fertilizer outlet is embedded in the ground; IV. After the fertilizer outlet is embedded in the ground, the fertilization cylinder (5) is extended, and the fertilizer is pressed out of the fertilizer outlet by air pressure; V. After fertilization is completed, the lowering cylinder (2) contracts, so that the fertilization rod (4) and the plug (41) are away from the ground, and at the same time, the sealing plate (42) and the soil-retaining plate (43) are automatically reset under the action of the spring (44), and fertilization is completed.

8. The working method of the drag-reducing injection fertilizer applicator according to claim 7, characterized in that: After the sealing plate (42) and the soil-retaining plate (43) are completely reset, the drainage pipe (62) is communicated with the fertilization chamber (45) for the second time, the fertilization cylinder (5) contracts, and after the fertilization column (51) passes through the opening of the drainage pipe (62), the fertilization column (51) continues to reset, so that the fertilizer flows into the fertilization chamber (45).

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