Precise fertilizer applicator

Abstract

The utility model discloses a precise fertilizer applicator which comprises a storage part, a fertilizer applying structure and a piston structure, and an accommodating cavity for accommodating water and fertilizer is formed in the storage part; the fertilizing structure comprises a fertilizing needle and a fertilizer suction part, the fertilizing needle is connected with the storage part, the axis of the fertilizing needle is parallel to the axis of the storage part, and a fertilizing channel of the fertilizing needle is communicated with the accommodating cavity; the fertilizer absorbing part is connected with the storage part, and a fertilizer absorbing channel is arranged in the fertilizer absorbing part and is connected with the accommodating cavity; the piston structure is connected with the storage part and comprises a piston, and the piston is arranged in the containing cavity; the piston has a first working state in which the piston moves in a direction far away from the fertilizing needle to suck water and fertilizer into the accommodating cavity from the fertilizer sucking piece; the piston has a second working state that the piston moves towards the fertilizing needle to drive the water fertilizer in the accommodating cavity to be output from the fertilizing needle. According to the structure, the fertilization efficiency is improved, the needle head is adopted as the fertilization needle, the fertilizer can be accurately applied to the root zone of a plant, and the utilization rate of the fertilizer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plant fertilization, in particular to a precision fertilizer applicator. Background Art

[0002] In agricultural production, tobacco is an important economic crop, and fertilization management during its growth process is particularly critical. Traditional fertilization methods often use manual spreading or watering, which is not only inefficient, but also difficult to ensure the uniformity and accuracy of fertilization, which easily causes fertilizer waste and environmental pollution. In recent years, with the development of precision agricultural technology, precision fertilization technology for tobacco plants has gradually become a research hotspot.

[0003] However, there are still some problems with the existing precision fertilization devices in practical applications. On the one hand, due to the complex root distribution of tobacco plants, it is difficult for traditional fertilization devices to accurately apply fertilizer to the root zone of the plants, resulting in low fertilizer utilization. On the other hand, when the built-in waste is consumed, the existing precision fertilization device needs to be pulled out and refilled with water and fertilizer, resulting in low fertilization efficiency. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is that the existing precision fertilization device still has some problems in practical application. On the one hand, due to the complex root distribution of tobacco plants, it is difficult for traditional fertilization devices to accurately apply fertilizer to the root area of ​​the plants, resulting in low fertilizer utilization. On the other hand, when the built-in waste is consumed, the existing precision fertilization device needs to be extracted and refilled with water and fertilizer, and the fertilization efficiency is low.

[0005] To this end, the utility model provides a precision fertilizer applicator, comprising:

[0006] A storage member, wherein a storage chamber for accommodating water and fertilizer is provided in the storage member;

[0007] A fertilization structure, the fertilization structure comprising a fertilization needle and a fertilizer suction piece, the fertilization needle is connected to the storage piece, the axis of the fertilization needle is arranged parallel to the axis of the storage piece, and the fertilization channel of the fertilization needle is connected to the accommodating cavity; the fertilizer suction piece is connected to the storage piece, the fertilizer suction piece is built with a fertilizer suction channel, and the fertilizer suction channel is connected to the accommodating cavity;

[0008] A piston structure, the piston structure is connected to the storage member, the piston structure comprises a piston, and the piston is arranged in the accommodating chamber;

[0009] Under the action of external force, the piston has a first working state in which it moves away from the fertilization needle to absorb water and fertilizer from the fertilizer suction member into the accommodating chamber; the piston has a second working state in which it moves toward the fertilization needle to drive the water and fertilizer in the accommodating chamber to be output from the fertilization needle.

[0010] Optionally, the above-mentioned fertilization structure further includes:

[0011] A first connecting tube, one end of which is connected to the storage member;

[0012] a second connecting pipe, wherein two ends of the second connecting pipe are respectively connected to the fertilizing needle and the first connecting pipe, the first connecting pipe and the second connecting pipe communicate the accommodating chamber with the fertilizing channel, and the second connecting pipe is provided with a first check valve, and the first check valve is used to prevent the water and fertilizer from moving from the fertilizing needle to the accommodating chamber;

[0013] A third connecting pipe, both ends of which are connected to the fertilizer suction member and the first connecting pipe respectively, the first connecting pipe and the third connecting pipe communicate with the accommodating chamber and the fertilizer suction channel, and the third connecting pipe is provided with a second check valve, which is used to prevent the water fertilizer from moving from the accommodating chamber to the fertilizer suction member.

[0014] Optionally, the above-mentioned precision fertilizer applicator further includes an outer tube,

[0015] The outer wall of the storage unit is provided with scale lines, and the outer tube is provided with a strip hole for observing the scale lines.

[0016] Optionally, the above piston structure includes:

[0017] A connecting piece, the connecting piece is connected to the outer tube, and the connecting piece passes through the outer tube and the storage piece and extends into the accommodating cavity;

[0018] A piston, wherein the piston is sleeved on the connecting member;

[0019] A power piece is arranged at an end of the outer tube away from the fertilizing needle, and an output end of the power piece is connected to the connecting piece.

[0020] Optionally, the piston comprises:

[0021] A piston body, wherein a connecting sleeve is provided at the center of the piston body; the connecting sleeve is sleeved on the connecting piece, and the connecting sleeve is threadedly connected to the connecting piece;

[0022] The sealing gasket is sleeved on the outer wall of the piston body, two limiting notches are symmetrically arranged on the outer ring wall of the sealing gasket, and two limiting strips symmetrically arranged on the inner wall of the storage part are slidably connected with the limiting notches.

[0023] Optionally, an air hole is provided at one end of the storage member away from the fertilization needle.

[0024] Optionally, a strip card is arranged on the outer wall of the outer tube, the card slot of the strip card is matched with the shape of the fertilizer sucking piece, and the strip card is used to place the fertilizer sucking piece.

[0025] Optionally, a gravity ball is installed at one end of the fertilizer absorption component away from the storage component, and a filter screen is provided at the water inlet of the gravity ball.

[0026] Optionally, the above-mentioned precision fertilizer applicator further includes a humidity sensor, which is built in a mounting box, and the mounting box is fixed in the fertilization channel of the fertilization needle through at least three connecting rods.

[0027] Optionally, the outer tube has a protective box away from the fertilization needle, a battery electrically connected to the power component is installed in the protective box, the power component is located in the protective box, and a heat dissipation hole for heat dissipation of the power component is opened on the protective box.

[0028] The technical solution provided by the utility model has the following advantages:

[0029] 1. The utility model provides a precision fertilizer applicator, comprising: a storage unit, a fertilizer application structure and a piston structure. The storage unit is a cylindrical tube, and a cylindrical accommodating chamber is provided in the storage unit; the fertilizer application structure comprises a fertilizer application needle and a fertilizer suction unit, the fertilizer application needle is fixed at one end of the storage unit, and the axis of the fertilizer application needle coincides with the axis of the accommodating chamber to ensure that the fertilizer application needle is correspondingly arranged at the center position of the storage unit, and the fertilizer application channel of the fertilizer application needle is connected with the accommodating chamber; the fertilizer suction unit is a hose, and the fertilizer suction unit is arranged at the side of the storage rack, and a fertilizer suction channel is built in the fertilizer suction unit, and the fertilizer suction channel is connected with the accommodating chamber; the piston structure comprises a piston, and the piston is arranged in the accommodating chamber.

[0030] When it is necessary to position and inject fertilizer to the plant, firstly, the end of the fertilizer suction piece away from the storage piece is placed in the container for storing water and fertilizer, and sufficient water and fertilizer are extracted from the container for storing water and fertilizer, and external force is applied to the piston to drive the piston to move toward the end away from the fertilizer suction piece, and the water and fertilizer are sucked into the accommodating chamber, and then the fertilizer needle is extended into the soil until it reaches the root of the plant, and under the action of external force, the piston is moved toward the direction close to the fertilizer needle, and the water and fertilizer in the storage piece are injected into the root area of ​​the tobacco plant. When the amount of water and fertilizer injected at one time is not enough, the end of the fertilizer suction piece away from the storage piece can also be placed in the container for storing water and fertilizer, so as to repeat the above process and achieve the purpose of continuous injection. There is no need to extract the fertilizer needle, which improves the fertilization efficiency, and the present invention adopts a needle as a fertilizer needle, which can accurately apply fertilizer to the root area of ​​the plant and improve the utilization rate of the fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 This is a schematic diagram of the overall structure of the precision fertilizer applicator provided in the utility model;

[0033] Figure 2 This is a schematic diagram of the internal structure of the precision fertilizer applicator provided in the utility model;

[0034] Figure 3 This is a schematic diagram of the installation of the humidity sensor of the precision fertilizer applicator provided in the utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the piston of the precision fertilizer applicator provided in the utility model;

[0036] Description of reference numerals:

[0037] 1- storage unit; 11- ventilation hole; 12- graduation line;

[0038] 2-outer tube; 21-bar card; 22-handle;

[0039] 3-fertilization structure; 31-fertilization needle; 32-fertilizer suction piece; 33-gravity ball; 34-first connecting pipe; 35-second connecting pipe; 36-third connecting pipe; 37-first check valve; 38-second check valve;

[0040] 4-piston structure; 41-connecting piece; 42-piston; 421-piston body; 422-sealing pad; 423-limiting notch; 424-connecting sleeve; 43-power piece;

[0041] 51 - humidity sensor; 52 - mounting box; 53 - connecting rod;

[0042] 61 - protection box; 62 - heat dissipation hole; 63 - battery. DETAILED DESCRIPTION

[0043] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are 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.

[0044] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0047] Example

[0048] like Figures 1 to 4As shown, this embodiment provides a precision fertilizer applicator, including: a storage member 1, a fertilizer structure 3 and a piston structure 4. The storage member 1 is a cylindrical tube, and a cylindrical accommodating chamber is provided in the storage member 1; the fertilizer structure 3 includes a fertilizer needle 31 and a fertilizer suction member 32. The fertilizer needle 31 is fixed at one end of the storage member 1, and the axis of the fertilizer needle 31 coincides with the axis of the accommodating chamber to ensure that the fertilizer needle 31 is correspondingly arranged at the center position of the storage member 1, and the fertilizer channel of the fertilizer needle 31 is connected to the accommodating chamber; the fertilizer suction member 32 is a hose, and the fertilizer suction member 32 is arranged at the side of the storage rack, and the fertilizer suction member 32 has a built-in fertilizer suction channel, and the fertilizer suction channel is connected to the accommodating chamber; the piston structure 4 includes a piston 42, and the piston 42 is arranged in the accommodating chamber.

[0049] When it is necessary to position and inject fertilizer to the plant, first, place the end of the fertilizer suction member 32 away from the storage member 1 into the container for storing water and fertilizer, extract a sufficient amount of water and fertilizer from the container for storing water and fertilizer, apply external force to the piston 42, drive the piston 42 to move toward the end away from the fertilizer suction member 32, and suck the water and fertilizer into the accommodating chamber, then extend the fertilizer needle 31 into the soil until it reaches the root of the plant, and under the action of external force, move the piston 42 toward the direction close to the fertilizer needle 31, and inject the water and fertilizer in the storage member 1 into the root area of ​​the tobacco plant. When the amount of water and fertilizer injected at one time is not enough, the end of the fertilizer suction member 32 away from the storage member 1 can also be placed in the container for storing water and fertilizer, so as to repeat the above process and achieve the purpose of continuous injection. There is no need to extract the fertilizer needle 31, which improves the fertilization efficiency, and the present invention uses a needle as the fertilizer needle 31, which can accurately apply fertilizer to the root area of ​​the plant and improve the utilization rate of fertilizer.

[0050] like Figure 2 As shown, specifically, the fertilization structure 3 further includes: a first connecting pipe 34, a second connecting pipe 35 and a third connecting pipe 36. The right end of the first connecting pipe 34 is connected to the storage member 1, the circulation channel in the first connecting pipe 34 is connected to the accommodating chamber, the right end of the second connecting pipe 35 is connected to the left end of the first connecting pipe 34 through a flange, the second connecting pipe 35 is connected to the first connecting pipe 34, a first check valve 37 is fixed to the left end of the second connecting pipe 35, the left end of the first check valve 37 is connected to the fertilization needle 31, and the opening or closing of the first check valve 37 can realize the connection or isolation of the fertilization channel and the circulation channel in the second connecting pipe 35. The third connecting pipe 36 is arranged at the lower left end of the first connecting pipe 34, the upper end of the third connecting pipe 36 is connected to the first connecting pipe 34, a second check valve 38 is fixed to the lower end of the third connecting pipe 36, the lower end of the second check valve 38 is fixedly connected to the third connecting pipe 36, and the opening or closing of the second check valve 38 can realize the connection or isolation between the fertilizer absorption channel and the flow channel in the first connecting pipe 34. The first check valve 37 can only be opened from the accommodating chamber to the fertilizer needle 31, and the second check valve 38 can only be opened from the fertilizer absorption member 32 to the accommodating chamber.

[0051] When it is necessary to position fertilize the plant or to add water and fertilizer again during the fertilization process, an external force is applied to the piston 42 to drive the piston 42 to move toward the end away from the fertilizer suction part 32. At this time, the first check valve 37 is automatically closed, and the second check valve 38 is automatically opened to suck the water and fertilizer into the accommodating chamber. When it is necessary to output the water and fertilizer through the fertilizer needle 31, under the action of an external force, the piston 42 is moved toward the direction close to the fertilizer needle 31. At this time, the first check valve 37 is automatically opened, and the first check valve 37 is automatically closed, and the water and fertilizer in the storage part 1 are injected into the root area of ​​the tobacco plant. Through the above-mentioned arrangement, the fertilizer suction part 32 and the fertilizer needle 31 are divided into different tasks, functional disorder is avoided, and construction efficiency is improved. As a preferred embodiment of this embodiment, the first connecting pipe 34 and the second connecting pipe 35, and the first connecting pipe 34 and the third connecting pipe 36 are all connected by flanges. The flange connection is used to ensure the sealing between the pipes and prevent leakage.

[0052] like Figure 1 and Figure 2 As shown, in this embodiment, the precision fertilizer applicator also includes an outer tube 2, and a scale line 12 is arranged on the outer wall of the storage part 1, and a strip hole for observing the scale line 12 is opened on the outer tube 2. The piston structure 4 includes: a connecting member 41, a piston 42 and a power member 43; the connecting member 41 is a screw rod, and the connecting member 41 passes through the outer tube 2 and the storage part 1 along the axial direction of the outer tube 2 and extends into the accommodating chamber, and the power member 43 is arranged at the right end of the connecting member 41, and the output end of the power member 43 is connected to the connecting member 41. The piston 42 includes: a piston body 421, a connecting sleeve 424 and a sealing gasket 422. A through hole is opened in the middle of the piston body 421, and the connecting sleeve 424 is fixed in the through hole. The middle part of the connecting sleeve 424 is a threaded hole. The connecting sleeve 424 is sleeved on the connecting member 41, and the sealing gasket 422 is sleeved on the piston body 421. The piston 42 is located in the accommodating chamber, two limiting notches 423 are symmetrically provided on the outer ring wall of the sealing gasket 422, and two limiting bars slidably connected to the limiting notches 423 are symmetrically provided on the inner wall of the storage member 1. The storage member 1 and the limiting bars are integrally formed.

[0053] When the piston 42 needs to be driven to move, the limit strip is slidably connected with the limit notch 423, thereby limiting the rotational freedom of the piston 42 and preventing it from deflecting or getting stuck during the movement. The power member 43 drives the connecting member 41 to rotate, and the rotational motion is converted into a linear motion along the axis direction of the storage member 1 through the threaded connection between the connecting member 41 and the connecting sleeve 424 and the limit notch 423 and the limit strip. Then, the piston 42 can move left and right in the accommodating chamber, and the water and fertilizer can be absorbed and injected. A sealing gasket 422 is fixedly connected to the outer wall of the piston 42 to enhance the sealing performance between the storage member 1 and the piston 42, and prevent the water and fertilizer from leaking from the left end of the piston 42 to the right end. At the same time, a vent hole 11 is provided at the right end of the storage member 1 to balance the air pressure inside and outside the storage member 1 and ensure that the piston 42 can move smoothly.

[0054] The storage part 1 is made of a transparent material, and the piston 42 moves along the inside of the storage part 1. The position of the piston 42 on the scale line 12 can be observed from the strip hole, so as to accurately control the release amount of water and fertilizer.

[0055] In this embodiment, a handle 22 is fixedly connected to the circumferential outer wall of the outer tube 2, and the handle 22 is convenient for the user to hold and operate the fertilizer applicator. A strip card 21 for placing a straw is fixedly connected to the outer wall of the outer tube 2. The strip card 21 extends along the axial direction of the storage component 1 to firmly store the fertilizer suction component 32 when not in use to prevent it from swinging or being damaged.

[0056] In this embodiment, a gravity ball 33 is installed at one end of the fertilizer sucking member 32 away from the storage member 1, and a filter is provided at the water inlet of the gravity ball 33. The gravity ball 33 is provided to facilitate the fertilizer sucking member 32 to sink into the container, so as to facilitate the extraction of water fertilizer from the container storing water fertilizer, and the filter is provided to filter impurities.

[0057] The humidity sensor 51 is installed in a mounting box 52 located outside the humidity sensor 51. At least three connecting rods 53 are fixed to the outer circumferential wall of the mounting box 52. The end of the connecting rod 53 away from the mounting box 52 is fixed to the inner wall of the fertilizer needle 31. The mounting box 52 and the connecting rod 53 are used for the installation of the humidity sensor 51. It should be noted that, under normal circumstances, the soil humidity near the roots of the plants is relatively high, so the humidity sensor 51 can be used for further precise positioning.

[0058] like Figure 2 As shown, a protection box 61 is fixed to the right end of the outer tube 2, and a battery 63 electrically connected to the power member 43 is installed in the protection box 61. The power member 43 is a motor, and the power member 43 is located in the protection box 61. A heat dissipation hole 62 for heat dissipation of the power is opened on the protection box 61. The protection box 61 is used to protect the power member 43.

[0059] When the precision fertilizer applicator of the utility model is in use, firstly, a sufficient amount of water and fertilizer is extracted from the container for storing water and fertilizer. Specifically, the gravity ball 33 is placed in the container and then the power part 43 is started, through which the connecting part 41 is driven to rotate, and then the piston 42 is driven to move to the right. At this time, the second check valve 38 is opened, and the first check valve 37 is closed, and the water and fertilizer are pumped into the storage part 1, and then the fertilizer needle 31 is extended into the tobacco root system in the soil. The root area of ​​the tobacco plant can be further accurately positioned with the help of the humidity sensor 51, and then the piston 42 is pushed to the left. At this time, the second check valve 38 is closed, and the first check valve 37 is opened, that is, the water and fertilizer can be pushed to the root area of ​​the tobacco plant through the fertilizer needle 31, and the scale line 12 is observed in the process of pushing the piston 42 to determine the amount of fertilizer.

[0060] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A precision fertilizer applicator, characterized in that: include: A storage member (1), wherein the storage member (1) is provided with a receiving cavity for receiving water and fertilizer; A fertilizing structure (3), the fertilizing structure (3) comprising a fertilizing needle (31) and a fertilizer suction piece (32), the fertilizing needle (31) being connected to the storage piece (1), the axis of the fertilizing needle (31) being arranged parallel to the axis of the storage piece (1), the fertilizing channel of the fertilizing needle (31) being connected to the accommodating cavity; the fertilizer suction piece (32) being connected to the storage piece (1), the fertilizer suction piece (32) being provided with a fertilizer suction channel, the fertilizer suction channel being connected to the accommodating cavity; A piston structure (4), the piston structure (4) being connected to the storage element (1), the piston structure (4) comprising a piston (42), and the piston (42) being arranged in the accommodating chamber; Under the action of an external force, the piston (42) has a first working state in which it moves in a direction away from the fertilizing needle (31) to absorb water and fertilizer from the fertilizer suction member (32) into the accommodating chamber; and the piston (42) has a second working state in which it moves in a direction close to the fertilizing needle (31) to drive the water and fertilizer in the accommodating chamber to be output from the fertilizing needle (31).

2. The precision fertilizer applicator according to claim 1, characterized in that: The fertilization structure (3) further comprises: A first connecting tube (34), one end of which is connected to the storage element (1); a second connecting pipe (35), the two ends of which are respectively connected to the fertilizing needle (31) and the first connecting pipe (34), the first connecting pipe (34) and the second connecting pipe (35) are connected to the accommodating chamber and the fertilizing passage, the second connecting pipe (35) is provided with a first check valve (37), the first check valve (37) is used to prevent the water and fertilizer from moving from the fertilizing needle (31) to the accommodating chamber; a third connecting pipe (36), the two ends of which are respectively connected to the fertilizer sucking member (32) and the first connecting pipe (34); the first connecting pipe (34) and the third connecting pipe (36) are connected to the accommodating chamber and the fertilizer sucking passage; the third connecting pipe (36) is provided with a second check valve (38); the second check valve (38) is used to prevent the water fertilizer from moving from the accommodating chamber to the fertilizer sucking member (32).

3. The precision fertilizer applicator according to claim 1, characterized in that: The precision fertilizer applicator further comprises an outer tube (2), The outer wall of the storage element (1) is provided with scale lines (12), and the outer tube (2) is provided with a strip hole for observing the scale lines (12).

4. The precision fertilizer applicator according to claim 3, characterized in that: The piston structure (4) comprises: A connecting piece (41), the connecting piece (41) being connected to the outer tube (2), and the connecting piece (41) passing through the outer tube (2) and the storage piece (1) and extending into the accommodating cavity; A piston (42), wherein the piston (42) is sleeved on the connecting member (41); A power piece (43), the power piece (43) is arranged at an end of the outer tube (2) away from the fertilization needle (31), and the output end of the power piece (43) is connected to the connecting piece (41).

5. The precision fertilizer applicator according to claim 4, characterized in that: The piston (42) comprises: A piston body (421), wherein a connecting sleeve (424) is provided at the center of the piston body (421); the connecting sleeve (424) is sleeved on the connecting piece (41), and the connecting sleeve (424) is threadedly connected to the connecting piece (41); A sealing gasket (422) is sleeved on the outer wall of the piston body (421), two limiting notches (423) are symmetrically provided on the outer ring wall of the sealing gasket (422), and two limiting strips slidably connected to the limiting notches (423) are symmetrically provided on the inner wall of the storage member (1).

6. The precision fertilizer applicator according to claim 5, characterized in that: An air hole (11) is formed at one end of the storage member (1) away from the fertilization needle (31).

7. The precision fertilizer applicator according to any one of claims 3 to 6, characterized in that: A strip card (21) is arranged on the outer wall of the outer tube (2), the card slot of the strip card (21) is matched with the shape of the fertilizer sucking piece (32), and the strip card (21) is used to place the fertilizer sucking piece (32).

8. The precision fertilizer applicator according to any one of claims 1 to 6, characterized in that: A gravity ball (33) is installed at one end of the fertilizer absorption part (32) away from the storage part (1), and a filter screen is provided at the water inlet of the gravity ball (33).

9. The precision fertilizer applicator according to any one of claims 1 to 6, characterized in that: The precision fertilizer applicator further comprises a humidity sensor (51), wherein the humidity sensor (51) is built into a mounting box (52), and the mounting box (52) is fixed in the fertilization channel of the fertilization needle (31) via at least three connecting rods (53).

10. The precision fertilizer applicator according to any one of claims 3 to 6, characterized in that: The outer tube (2) has a protection box (61) away from the fertilizing needle (31), a storage battery (63) electrically connected to the power component (43) is installed in the protection box (61), the power component (43) is located in the protection box (61), and a heat dissipation hole (62) for heat dissipation of the power component (43) is opened on the protection box (61).

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