A periodic fertilization device and method for agricultural planting

Abstract

The present invention relates to the field of agricultural fertilization, and in particular to a periodic fertilization device and method for agricultural planting, including a fixed shell, a limiting ring, a guide plate, a slow-release bucket and a slow-release ball; a hemispherical fixed shell is provided with a plurality of fixing holes arranged in a circular array; a limiting ring is fixedly connected to the outer side of the fixed shell, and the fixing holes are all located in the limiting ring; a guide plate is fixedly connected to the inner side of the fixed shell, and the guide plate is a disc-shaped structure with a low middle and high surroundings; a conical slow-release bucket is detachably connected to the lower side of the fixed shell; a slow-release ball is fixedly connected to the conical vertex of the slow-release bucket; a round tube is also included; and each fixing hole is fixedly connected to a round tube. The present invention allows the buoyancy ball I to float up in the round tube under the buoyancy of water. When the buoyancy ball I floats up to contact with the circular plate, the buoyancy ball I blocks the circular hole of the circular plate, and then closes the circular tube, preventing external moisture from continuously entering the fixed shell, so that the fertilizer aqueous solution in the fixed shell overflows from the circular tube, thereby avoiding waste of fertilizer.

Description

Technical Field

[0001] The present invention relates to the field of agricultural fertilization, and in particular to a periodic fertilization device and method for agricultural planting. Background Art

[0002] In agricultural planting, it is necessary to fertilize the crop soil periodically. For example, the existing Chinese patent: CN112374953B discloses a fertilizer coated slow-release agent and its application method. Multiple fast hydrolysis parts and slow hydrolysis parts are hydrolyzed successively, and water is introduced into the elliptical coating shell to dilute the fertilizer. When the slow hydrolysis part is completely hydrolyzed, it is used to trigger the sinking ball. The sinking ball falls when there is no limit and pierces the upper film and the lower film in turn. After the lower film is pierced, the diluted fertilizer is discharged downward through the infiltration port and slowly penetrates into the soil through the load-bearing slow-release ball and the conical slow-release body. It has long-lasting effect and does not require topdressing.

[0003] However, the slow-release fertilization device is disposable and cannot be reused, has great limitations, and is not very practical. Summary of the invention

[0004] In order to overcome the disadvantages of the existing slow-release fertilization device that it is disposable, cannot be reused, and has great limitations, the present invention provides a periodic fertilization device and method for agricultural planting.

[0005] The technical solution of the present invention is: a periodic fertilization device for agricultural planting, comprising a fixed shell, a limit ring, a guide plate, a slow-release bucket and a slow-release ball; a hemispherical fixed shell is provided with a plurality of fixing holes arranged in a ring array; a limit ring is fixedly connected to the outer side of the fixed shell, and the fixing holes are all located in the limit ring; a guide plate is fixedly connected to the inner side of the fixed shell, and the guide plate is a disc-shaped structure with a low middle and high surroundings; a conical slow-release bucket is detachably connected to the lower side of the fixed shell; a slow-release ball is fixedly connected to the cone vertex of the slow-release bucket; it also includes a circular tube, a buoyancy ball I, a circular plate and a trigger assembly; each fixing hole is fixedly connected to a circular tube; a buoyancy ball I is arranged in each circular tube, and a gap is formed between the buoyancy ball I and the inner wall of the circular tube; each circular tube is fixedly connected to a circular plate, and the circular plate is located above the buoyancy ball I, and the circular plate is provided with a circular hole; the fixed shell is connected to a trigger assembly for controlling the release of fertilizer.

[0006] Furthermore, it also includes a supporting plate; each circular tube is fixed with a supporting plate, and the supporting plate is located below the buoyancy ball I.

[0007] Furthermore, a sealing gasket is provided on the circular plate.

[0008] Furthermore, the lower side of the circular plate is arranged to be higher in the middle and lower around.

[0009] Furthermore, the trigger assembly includes a guide tube, a water inlet pipe, an effervescent tablet, a guide ring, a hook, a buoyancy ball II, a prick, a flap I, a flap II and a cover; the fixed shell is fixedly connected to the guide tube; the guide tube is connected to a plurality of water inlet pipes; the guide tube is connected to the effervescent tablet; the guide tube is fixedly connected to the guide ring, and the guide ring is located below the effervescent tablet, and the guide ring is provided with a round hole; the effervescent tablet is connected to the hook, and the hook is smaller than the round hole in the guide ring, and the hook is made of elastic plastic, and the hook passes through the round hole in the guide ring; the hook is fixedly connected to the buoyancy ball II; the prick is fixedly connected to the lower side of the buoyancy ball II; the guide tube is fixedly connected to the flap I, and the flap I is located below the prick; the guide plate is fixedly connected to the flap II; the guide tube is detachably connected to the cover.

[0010] Furthermore, it also includes a limit plate; the guide tube is fixedly connected to the limit plate, and the limit plate is fixedly connected to the guide ring, and the lower side of the limit plate is higher in the middle and lower around, and the limit plate is provided with a circular hole, and the circular hole of the limit plate is aligned with the circular hole of the guide ring.

[0011] Furthermore, it also includes a separation ring; a plurality of separation rings are fixedly connected to the inner wall of the slow-release bucket.

[0012] Furthermore, it also includes a baffle ring; the baffle ring is fixedly connected to the guide ring, and the baffle ring is in contact with the effervescent tablet, and the hook is smaller than the circular hole in the baffle ring.

[0013] Furthermore, it also includes an outer ring; the outer side of the slow-release bucket is connected with the outer ring, and the outer ring is made of cloth and has a thin thickness.

[0014] Furthermore, the fertilization method of the periodic fertilization device for agricultural planting is as follows: 1. The sprayer in the greenhouse is manually controlled to spray water to the device in a quantitative manner; 2. When the water level of the fertilizer aqueous solution contacts the buoyancy ball I, the buoyancy ball I floats up in the circular tube under the buoyancy of the water, and when the buoyancy ball I floats up to contact the circular plate, the buoyancy ball I blocks the circular hole of the circular plate, thereby closing the circular tube; 3. The water in the limiting ring enters the water inlet pipe through the water inlet pipe. The liquid fertilizer in the guide plate quickly flows from flap Ⅱ to the slow-release bucket, so that the liquid fertilizer continues to penetrate into the soil through the slow-release bucket; Fourth, the guide tube and its connected parts are taken out from the fixed shell, and the cover is removed from the guide tube, a new effervescent tablet is put back into the guide tube, and the fertilizer is poured back into the fixed shell.

[0015] The beneficial effect is that when adding fertilizer into the fixed shell and replacing the effervescent tablet, the present invention only needs to take out the guide tube and the parts connected thereto from the fixed shell, remove the cover from the guide tube, put the new effervescent tablet back into the guide tube, and pour the fertilizer into the fixed shell again, continue to sprinkle water on the device, and then allow the fertilizer solution to continue to slowly penetrate into the soil for fertilization, thereby achieving the effect of periodically repeating the use of the device.

[0016] In the present invention, as water continues to enter the fixed shell, more and more fertilizer aqueous solution is contained in the fixed shell. When the water level of the fertilizer aqueous solution contacts the buoyancy ball I, the buoyancy ball I floats up in the circular tube under the action of the buoyancy of water. When the buoyancy ball I floats up to contact the circular plate, the buoyancy ball I blocks the circular hole of the circular plate, and then closes the circular tube, so that external water is prevented from continuously entering the fixed shell, and the fertilizer aqueous solution in the fixed shell overflows from the circular tube, so as to avoid waste of fertilizer.

[0017] When the fertilizer aqueous solution on the guide plate of the present invention flows completely into the slow-release bucket, fertilizer will remain on the guide plate. At this time, the buoyancy ball I loses the buoyancy effect of the fertilizer aqueous solution on the guide plate, and then the buoyancy ball I falls downward under the action of its own gravity, and then the buoyancy ball I stops contacting the circular plate, and then the buoyancy ball I opens the circular tube, and then the liquid on the limit ring flows into the guide plate through the circular tube, and then the fertilizer aqueous solution remaining on the guide plate is washed, so that the residual fertilizer continues to penetrate into the soil, thereby improving the utilization rate of the fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the periodic fertilization device for agricultural planting disclosed by the present invention;

[0019] Figure 2 It is a schematic diagram of the combined partial structure of the fixed shell, the limiting ring, the guide plate, the slow-release bucket, the slow-release ball, the circular tube, the outer ring and the separation ring disclosed in the periodic fertilization device for agricultural planting of the present invention;

[0020] Figure 3 A cross-sectional view of the periodic fertilization device for agricultural planting disclosed by the present invention;

[0021] Figure 4 It is a schematic diagram of the combined partial structure of the fixed shell, the limiting ring, the round tube, the buoyancy ball I, the round plate, the guide tube, the water inlet pipe, the effervescent tablet, the guide ring, the hook, the buoyancy ball II, the retaining ring, and the cover disclosed in the periodic fertilization device for agricultural planting of the present invention;

[0022] Figure 5 It is a partial structural diagram of the first combination of the slow-release bucket, the slow-release ball and the outer ring disclosed in the periodic fertilization device for agricultural planting of the present invention;

[0023] Figure 6This is a partial structural schematic diagram of a second combination of the slow-release bucket, the slow-release ball, and the outer ring disclosed in the periodic fertilization device for agricultural planting of the present invention.

[0024] The names and serial numbers of the parts in the figure are: 1-fixed shell, 2-limiting ring, 3-guide plate, 4-slow-release bucket, 5-slow-release ball, 101-round tube, 102-buoyancy ball I, 103-round plate, 104-guide tube, 105-water inlet pipe, 106-effervescent tablet, 107-guide ring, 108-hook, 109-buoyancy ball II, 1010-puncture, 1011-flap I, 1012-flap II, 1013-support plate, 1014-limiting plate, 1015-separation ring, 1016-blocking ring, 1017-cover, 201-outer ring, 11-fixing hole. DETAILED DESCRIPTION

[0025] The preferred technical solutions of the present invention are described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] A periodic fertilization device for agricultural planting, such as Figure 1-6 As shown, it includes a fixed shell 1, a limiting ring 2, a guide plate 3, a slow-release bucket 4 and a slow-release ball 5; the hemispherical fixed shell 1 is provided with a plurality of fixing holes 11 arranged in a ring array; the limiting ring 2 is fixedly connected to the outer side of the fixed shell 1, and the fixing holes 11 are all located in the limiting ring 2; the guide plate 3 is fixedly connected to the inner side of the fixed shell 1, and the guide plate 3 is a disc-shaped structure with a low middle and high surroundings; the lower side of the fixed shell 1 is detachably connected to a conical slow-release bucket 4; the slow-release ball 5 is fixedly connected to the conical vertex of the slow-release bucket 4;

[0028] It also includes a circular tube 101, a buoyancy ball Ⅰ102, a circular plate 103 and a trigger component; each fixing hole 11 is fixedly connected to a circular tube 101; each circular tube 101 is provided with a buoyancy ball Ⅰ102, and there is a gap between the buoyancy ball Ⅰ102 and the inner wall of the circular tube 101; each circular tube 101 is fixedly connected to a circular plate 103, and the circular plate 103 is located above the buoyancy ball Ⅰ102, and the circular plate 103 is provided with a circular hole; the fixed shell 1 is connected to a trigger component for controlling the release of fertilizer.

[0029] It also includes a support plate 1013; each circular tube 101 is fixed with a support plate 1013, and the support plate 1013 is located below the buoyancy ball I 102.

[0030] The circular plate 103 is provided with a sealing gasket to enhance the sealing effect between the circular plate 103 and the circular tube 101 and further prevent the fertilizer aqueous solution from leaking out.

[0031] The lower side of the circular plate 103 is higher in the middle and lower around, thereby guiding the floating buoyancy ball I102 so that the buoyancy ball I102 accurately blocks the circular hole of the circular plate 103, thereby ensuring the sealing effect of the buoyancy ball I102.

[0032] The trigger assembly includes a guide tube 104, a water inlet pipe 105, an effervescent tablet 106, a guide ring 107, a hook 108, a buoyancy ball II 109, a piercing 1010, a flap I 1011, a flap II 1012 and a cover 1017; the fixed shell 1 is fixedly connected with the guide tube 104; the guide tube 104 is connected with two water inlet pipes 105; the guide tube 104 is connected with the effervescent tablet 106; the guide tube 104 is fixedly connected with the guide ring 107, and the guide ring 107 is located below the effervescent tablet 106, and the guide ring 107 is provided with a circular hole ; The effervescent tablet 106 is connected with a hook 108, and the hook 108 is smaller than the round hole in the guide ring 107, and the hook 108 is made of elastic plastic material, and the hook 108 passes through the round hole of the guide ring 107; the hook 108 is fixedly connected with a buoyancy ball II 109; the lower side of the buoyancy ball II 109 is fixedly connected with a puncture 1010; the guide tube 104 is fixedly connected with a flap I 1011, and the flap I 1011 is located below the puncture 1010; the guide plate 3 is fixedly connected with a flap II 1012; the guide tube 104 is detachably connected with a cover 1017.

[0033] The guide ring 107 is arranged to be low in the middle and high around, thereby guiding the water flow and facilitating the water flow to enter the guide pipe 104 .

[0034] It also includes a limiting plate 1014; the guide tube 104 is fixedly connected to the limiting plate 1014, and the limiting plate 1014 is fixedly connected to the guide ring 107, and the lower side of the limiting plate 1014 is high in the middle and low around, and the limiting plate 1014 is provided with a circular hole, and the circular hole of the limiting plate 1014 is aligned with the circular hole of the guide ring 107.

[0035] It also includes a separation ring 1015; a plurality of separation rings 1015 are fixedly connected to the inner wall of the slow-release bucket 4.

[0036] It also includes a baffle ring 1016 ; the baffle ring 1016 is fixedly connected to the guide ring 107 , and the baffle ring 1016 is in contact with the effervescent tablet 106 , and the hook 108 is smaller than the circular hole in the baffle ring 1016 .

[0037] When in use, in the planting greenhouse, the fixed shell 1 is first manually removed from the slow-release bucket 4, and the liquid fertilizer is poured into the slow-release bucket 4. Then, the fixed shell 1 is reinstalled on the slow-release bucket 4. Subsequently, the guide tube 104 and the components thereon are removed from the fixed shell 1, and then the solid fertilizer is poured into the fixed shell 1. At this time, the fertilizer is temporarily stored on the guide plate 3 and the flap Ⅰ1011 and in the slow-release bucket 4. Then, the device is placed in the soil to be fertilized, so that the slow-release bucket 4 and the slow-release ball 5 are completely in contact with the soil. Initially, the buoyancy ball Ⅰ102 is located at the lower end of the circular tube 101.

[0038] After all the devices are placed in the soil, the sprinkler in the greenhouse is manually controlled to water the devices quantitatively. After the water is sprinkled on the fixed shell 1, it is temporarily stored on the surface of the fixed shell 1 through the limit ring 2. The water enters the circular tube 101 from the circular plate 103, and then the water enters the fixed shell 1 through the gap between the buoyancy ball I 102 and the inner wall of the circular tube 101, diluting the fertilizer in the fixed shell 1, so that the fertilizer becomes an aqueous solution. As the water continues to enter, the fixed shell 1, the fertilizer aqueous solution in the fixed shell 1 becomes more and more. When the water level of the fertilizer aqueous solution contacts the buoyancy ball Ⅰ102, the buoyancy ball Ⅰ102 floats in the circular tube 101 under the buoyancy of the water. When the buoyancy ball Ⅰ102 floats to contact the circular plate 103, the buoyancy ball Ⅰ102 blocks the circular hole of the circular plate 103, and then closes the circular tube 101, preventing the external water from continuously entering the fixed shell 1, so that the fertilizer aqueous solution in the fixed shell 1 overflows from the circular tube 101, thereby avoiding the waste of fertilizer.

[0039] It should be noted that, since the water has not yet contacted the water inlet pipe 105 at this time, the trigger component has not yet been triggered, and the water will not enter the fixed housing 1 from the trigger component temporarily.

[0040] The lower side of the buoyancy ball Ⅰ102 is supported by the support plate 1013 to prevent the buoyancy ball Ⅰ102 from falling out of the circular tube 101, so that the buoyancy ball Ⅰ102 is always located in the circular tube 101, and the buoyancy ball Ⅰ102 cannot rise quickly along the circular tube 101 when subjected to buoyancy, thereby reducing the blocking speed of the circular tube 101.

[0041] The liquid fertilizer in the slow-release bucket 4 slowly penetrates into the soil, thereby providing long-term fertilization to the soil. The amount of water sprayed by the sprinkler in the greenhouse is controlled so that after all the liquid fertilizer in the slow-release bucket 4 has penetrated, the solid fertilizer in the guide plate 3 is just diluted, and the buoyancy ball Ⅰ102 floats up to close the circular tube 101. Then, the water in the limiting ring 2 enters the guide tube 104 through the water inlet pipe 105, and then the water contacts and reacts with the effervescent tablet 106. The effervescent tablet 106 The effervescent tablet 106 is decomposed, and the limiting effect on the hook 108 is released, and the hook 108, the buoyancy ball II 109 and the probing 1010 fall downward rapidly under their own action, and the probing 1010 pokes the flap I 1011 and the flap II 1012 open, and the liquid fertilizer in the guide plate 3 quickly flows from the flap II 1012 to the slow-release bucket 4, and then the fertilizer in the slow-release bucket 4 is replenished, so that the liquid fertilizer continues to penetrate into the soil through the slow-release bucket 4.

[0042] Next, the liquid fertilizer enters the guide tube 104 , and the buoyancy ball II 109 floats up under the action of buoyancy, and then the buoyancy ball II 109 blocks the circular hole of the guide ring 107 when it contacts the guide ring 107 , thereby sealing the guide tube 104 to prevent external moisture from continuing to enter the guide tube 104 .

[0043] After the fertilizer solution flows into the slow-release bucket 4, the speed at which the fertilizer solution penetrates into the soil by the slow-release bucket 4 is much lower than the speed at which the fertilizer solution flows into the slow-release bucket 4 from the flap II 1012. Therefore, the slow-release bucket 4 is filled with the fertilizer solution, and the fertilizer solution is separated by the separation ring 1015, so that the nutrients in the fertilizer are relatively evenly distributed on the inner wall of the slow-release bucket 4, and the nutrients in the fertilizer solution are prevented from settling on the lower side of the slow-release bucket 4 during the slow penetration process, causing the nutrients in the slow-release bucket 4 to penetrate into the soil unevenly, thereby reducing the fertilization effect. The water entering the water inlet pipe 105 to dissolve the effervescent tablet 106 is blocked by the retaining ring 1016, so as to prevent the water from directly entering the guide pipe 104, so that the buoyancy ball II 109 is subjected to the buoyancy of the water, and the impact force of the hook 108, the buoyancy ball II 109, and the piercing 1010 falling downward is reduced, so that the flap I 1011 and the flap II 1012 cannot be completely pierced.

[0044] The floating buoyancy ball II 109 is guided by the limit plate 1014 so that the buoyancy ball II 109 accurately blocks the circular hole of the guide ring 107, thereby closing the guide tube 104 to prevent the buoyancy ball II 109 from deviating from the contact position with the lower side of the guide ring 107 when floating.

[0045] When all the fertilizer aqueous solution on the guide plate 3 flows into the slow-release bucket 4, fertilizer will remain on the guide plate 3. At this time, the buoyancy ball Ⅰ102 loses the buoyancy effect of the fertilizer aqueous solution on the guide plate 3, and then the buoyancy ball Ⅰ102 falls downward under the action of its own gravity, and then the buoyancy ball Ⅰ102 stops contacting the circular plate 103, and then the buoyancy ball Ⅰ102 opens the circular tube 101, and then the water on the limit ring 2 can flow into the guide plate 3 through the circular tube 101, and then the fertilizer aqueous solution remaining on the guide plate 3 is flushed, so that the residual fertilizer continues to penetrate into the soil, thereby improving the utilization rate of the fertilizer.

[0046] When adding fertilizer into the fixed shell 1 and replacing the effervescent tablet 106, it is only necessary to take out the guide tube 104 and the parts connected thereto from the fixed shell 1, remove the cover 1017 from the guide tube 104, put the new effervescent tablet 106 back into the guide tube 104, and pour the fertilizer into the fixed shell 1 again, continue to sprinkle water on the device, and then allow the fertilizer solution to continue to slowly penetrate into the soil for fertilization, thereby achieving the effect of periodic reuse.

[0047] Example 2

[0048] On the basis of Example 1, Figure 1-3 and Figure 5-6 As shown, an outer ring 201 is also included; the outer side of the slow-release bucket 4 is connected with the outer ring 201, and the outer ring 201 is made of cloth and has a thin thickness.

[0049] The fertilization method of the periodic fertilization device for agricultural planting is as follows: 1. The sprayer in the greenhouse is manually controlled to spray water to the device in a quantitative manner; 2. When the water level of the fertilizer aqueous solution contacts the buoyancy ball Ⅰ102, the buoyancy ball Ⅰ102 floats up in the circular tube 101 under the buoyancy of the water, and when the buoyancy ball Ⅰ102 floats up to contact the circular plate 103, the buoyancy ball Ⅰ102 blocks the circular hole of the circular plate 103, thereby closing the circular tube 101; 3. The water in the limiting ring 2 enters the guide tube 104 through the water inlet pipe 105, and then the effervescent tablet 106 is decomposed, and the hook 10 8. The buoyancy ball II 109 and the probing 1010 fall downward rapidly under their own action, and then the probing 1010 pokes open the flap I 1011 and the flap II 1012, and the liquid fertilizer in the guide plate 3 quickly flows from the flap II 1012 to the slow-release bucket 4, so that the liquid fertilizer continues to penetrate into the soil through the slow-release bucket 4; 4. The guide tube 104 and the parts connected thereto are taken out from the fixed shell 1, and the cover 1017 is removed from the guide tube 104, and a new effervescent tablet 106 is put back into the guide tube 104, and the fertilizer is poured into the fixed shell 1 again.

[0050] In Example 1, the method of manually placing the periodic fertilization device for agricultural planting into the soil is: manually inserting the slow-release bucket 4 and the slow-release ball 5 of the periodic fertilization device for agricultural planting vertically downward into the soil, but if the soil itself is relatively moist, after the slow-release bucket 4 and the slow-release ball 5 come into contact with the soil, the moist soil will tightly adhere to the outside of the slow-release bucket 4 and the slow-release ball 5, so that the soil seals the outside of the slow-release bucket 4 and the slow-release ball 5, reducing the efficiency of the fertilizer solution penetrating from the slow-release bucket 4 and the slow-release ball 5 into the soil. At this time, since the outer ring 201 is made of cloth, the moist soil is prevented from adhering to the outer ring 201. Then, the device is manually twisted to fix the device in the soil, and the liquid fertilizer slowly seeps out of the slow-release bucket 4 penetrates into the soil through the outer ring 201, thereby performing long-term fertilization on the soil.

[0051] The above is a detailed introduction to the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A periodic fertilization device for agricultural planting, comprising a fixed shell (1), a limiting ring (2), a guide plate (3), a slow-release bucket (4) and a slow-release ball (5); the hemispherical fixed shell (1) is provided with a plurality of fixing holes (11) arranged in a ring array; the outer side of the fixed shell (1) is fixedly connected to the limiting ring (2), and the fixing holes (11) are all located inside the limiting ring (2); the inner side of the fixed shell (1) is fixedly connected to the guide plate (3), and the guide plate (3) is a disk-shaped structure with a low middle and high surroundings; the lower side of the fixed shell (1) is detachably connected to a conical slow-release bucket (4); the slow-release ball (5) is fixedly connected to the conical vertex of the slow-release bucket (4); the characteristics are: It also includes a circular tube (101), a buoyancy ball I (102), a circular plate (103) and a trigger assembly; each fixing hole (11) is fixedly connected to a circular tube (101); each circular tube (101) is provided with a buoyancy ball I (102), and a gap is provided between the buoyancy ball I (102) and the inner wall of the circular tube (101); each circular tube (101) is fixedly connected to a circular plate (103), and the circular plate (103) is located above the buoyancy ball I (102), and a circular hole is provided in the circular plate (103); the fixing shell (1) is connected to a trigger assembly for controlling the release of fertilizer; It also includes a support plate (1013); each circular tube (101) is fixedly connected with a support plate (1013), and the support plate (1013) is located below the buoyancy ball I (102); The trigger assembly comprises a guide tube (104), a water inlet pipe (105), an effervescent tablet (106), a guide ring (107), a hook (108), a buoyancy ball II (109), a piercing (1010), a flap I (1011), a flap II (1012) and a cover (1017); the fixed shell (1) is fixedly connected to the guide tube (104); the guide tube (104) is connected to a plurality of water inlet pipes (105); the guide tube (104) is connected to the effervescent tablet (106); the guide tube (104) is fixedly connected to the guide ring (107), and the guide ring (107) is located below the effervescent tablet (106), and the guide ring (107) is provided with a The effervescent tablet (106) is connected to a hook (108), and the hook (108) is smaller than the circular hole in the guide ring (107), and the hook (108) is made of elastic plastic material, and the hook (108) passes through the circular hole of the guide ring (107); the hook (108) is fixedly connected to a buoyancy ball II (109); a puncture (1010) is fixedly connected to the lower side of the buoyancy ball II (109); the guide tube (104) is fixedly connected to a flap I (1011), and the flap I (1011) is located below the puncture (1010); the guide plate (3) is fixedly connected to a flap II (1012); the guide tube (104) is detachably connected to a cover (1017); It also includes a limiting plate (1014); the guide tube (104) is fixedly connected to the limiting plate (1014), and the limiting plate (1014) is fixedly connected to the guide ring (107); the lower side of the limiting plate (1014) is arranged to be high in the middle and low around; the limiting plate (1014) is provided with a circular hole, and the circular hole of the limiting plate (1014) is aligned with the circular hole of the guide ring (107); It also includes a retaining ring (1016); the guide ring (107) is fixedly connected to the retaining ring (1016), the retaining ring (1016) is in contact with the effervescent tablet (106), and the hook (108) is smaller than the circular hole in the retaining ring (1016).

2. A periodic fertilization device for agricultural planting according to claim 1, characterized in that: The circular plate (103) is provided with a sealing gasket.

3. The periodic fertilization device for agricultural planting according to claim 1, characterized in that: The lower side of the circular plate (103) is arranged with the middle being higher and the surrounding being lower.

4. The periodic fertilization device for agricultural planting according to claim 1, characterized in that: It also includes a separation ring (1015); a plurality of separation rings (1015) are fixedly connected to the inner wall of the slow-release bucket (4).

5. The periodic fertilization device for agricultural planting according to claim 1, characterized in that: It also includes an outer ring (201); the outer side of the slow-release bucket (4) is connected to the outer ring (201), and the outer ring (201) is made of cloth and has a thin thickness.

6. A periodic fertilization device for agricultural planting according to claim 1, wherein the fertilization method is as follows:

1. manually controlling the sprayer in the greenhouse to spray water to the device in a quantitative manner; manually controlling the sprayer in the greenhouse to spray water to the device in a quantitative manner; 2. When the water level of the fertilizer aqueous solution contacts the buoyancy ball I (102), the buoyancy ball I (102) floats up in the circular tube (101) under the buoyancy of the water. When the buoyancy ball I (102) floats up to contact the circular plate (103), the buoyancy ball I (102) blocks the circular hole of the circular plate (103), thereby closing the circular tube (101); 3. The water in the limiting ring (2) enters the guide tube (104) through the water inlet pipe (105), and then the effervescent tablet (106) is decomposed, and the hook (108), the buoyancy ball II (109) and the probing (1010) fall downward rapidly under their own action, and then the probing (1010) pokes the flap I (1011) and the flap II (1012) open, and the liquid fertilizer in the guide plate (3) quickly flows from the flap II (1012) into the slow-release bucket (4), so that the liquid fertilizer continues to penetrate into the soil through the slow-release bucket (4); Fourth, the guide tube (104) and its connected parts are taken out from the fixed shell (1), and the cover (1017) is removed from the guide tube (104), a new effervescent tablet (106) is put back into the guide tube (104), and the fertilizer is poured back into the fixed shell (1).

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