An integrated device for soil nutrient retention and application

Abstract

The application relates to the technical field of soil maintenance, in particular to a soil nutrient holding and applying integrated device, which comprises a fertilizer applying and preserving machine, a mixing assembly is installed on the fertilizer applying and preserving machine, the mixing assembly comprises a discharging barrel, two groups of discharging pipes are arranged at the lower end of the discharging barrel, a stirring rod is rotationally connected in the discharging barrel, and a plurality of first spray heads are arranged on the stirring rod. The two groups of bidirectional electric push rods are connected with the two groups of tail wings through mounting seats to realize active angle adjustment, simultaneously drive the two groups of tail wings to expand to adjust the ditch width, meanwhile, the two groups of bidirectional electric push rods are connected with the two groups of blocking plates through connecting rods to drive the two groups of blocking plates to open the discharging ports of the two groups of discharging pipes, the ditch width and the opening degree of the discharging ports of the two groups of discharging pipes are synchronously adjusted, the discharging amount and the ditch width can be accurately matched, the fertilizer application amount in unit ditch length is uniformly and stably ensured, the situation that the fertilizer is excessively applied or insufficiently applied is avoided, the adjustment operation is simplified, and the operation adaptability of the device and the consistency of fertilizer application and preservation are improved.

Description

Technical Field

[0001] This invention relates to the field of soil conservation technology, specifically to an integrated device for soil nutrient retention and application. Background Technology

[0002] The integrated soil nutrient fixation and application device is an agricultural equipment that integrates nutrient application and fertilization with soil nutrient fixation. Its core is to stabilize nutrients in the root zone soil through physical, chemical or biological mechanisms while accurately supplying nutrients, thereby reducing leaching, volatilization and fixation, improving fertilizer utilization and soil health. In the operation of existing fertilizer applicators, traditional structures often use independent adjustment of the trench width and the opening of the discharge pipe. Because the two mechanisms are controlled separately, it is difficult to achieve precise matching between the discharge volume and the trench width, which can easily lead to uneven fertilizer application per unit trench length, resulting in local over- or under-fertilization. This has a certain impact on the uniformity of fertilizer application and retention and the adaptability of the applicator to field operations. Summary of the Invention

[0003] The purpose of this invention is to provide an integrated device for soil nutrient retention and application. Two sets of bidirectional electric push rods are adjustable at both ends via mounting bases, simultaneously driving two sets of tail wings to deploy and adjust the trench width. At the same time, the two sets of bidirectional electric push rods are connected by connecting rods to drive two sets of sealing plates to open the discharge port of each set of discharge pipes. This allows for synchronous adjustment of the trench width and the opening of the discharge ports of the two sets of discharge pipes, enabling precise matching of the discharge amount with the trench width. This ensures uniform and stable fertilization within a unit trench length, avoiding over- or under-fertilization. It also simplifies the adjustment operation and improves the device's operational adaptability and consistency of fertilization and nutrient retention.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an integrated device for soil nutrient retention and application, comprising a fertilizer applicator, a mixing component installed on the fertilizer applicator, the mixing component including a feeding hopper, two sets of discharge pipes at the lower end of the feeding hopper, a stirring rod rotatably connected inside the feeding hopper, multiple sets of first nozzles on the stirring rod, one end of each first nozzle being connected to a storage box via a first transmission pipe, the storage box storing a water-retaining agent, the storage box being fixedly installed on the fertilizer applicator, the other end of the stirring rod being connected to a reciprocating threaded rod via a synchronous belt, a threaded disc slidably connected to the feeding hopper, a piston tube outside the threaded disc, a third transmission pipe connected inside the piston tube, and second nozzles at both ends of the third transmission pipe, the two sets of second nozzles being respectively installed inside the two sets of discharge pipes; The fertilizer applicator is equipped with a fertilizer retention component at its lower end. The fertilizer retention component includes two sets of furrow openers. Each set of furrow openers is rotatably connected to two sets of tail wings. The tail wings are connected by a hinge. A bidirectional electric push rod is movably connected between the two sets of tail wings. Both ends of the bidirectional electric push rod are fixedly connected to a sealing plate via a connecting rod. Both sealing plates are slidably connected to the inside of each discharge pipe.

[0005] Preferably, both ends of the stirring rod penetrate the interior of the feeding hopper, and the end of the stirring rod that communicates with the first transmission pipe is provided with a groove. One end of the first transmission pipe is provided with a convex ring that slides inside the groove. A motor is fixedly installed on the outside of the feeding hopper by a mounting bracket, and the other end of the stirring rod is fixedly connected to the output end of the motor.

[0006] Preferably, the storage box is equipped with a water pump, the other end of the first transmission pipe penetrates the outer wall of the storage box, and the other end of the first transmission pipe is fixedly connected to the output end of the water pump.

[0007] Preferably, the piston tube is fixedly installed on the fertilizer applicator, and the piston tube is provided with an air inlet pipe and a one-way valve.

[0008] Preferably, one end of the reciprocating threaded rod penetrates the interior of the piston tube, and one end of the reciprocating threaded rod is connected to the other end of the stirring rod via a synchronous belt. The reciprocating threaded rod and the threaded disc are connected via a ball nut pair. The piston tube has a groove inside, and the threaded disc has a protrusion on the outside that slides inside the groove.

[0009] Preferably, the piston tube is internally connected to a second transmission tube, and one end of the second transmission tube is internally connected to a third transmission tube.

[0010] Preferably, both sets of hinges are installed inside the trencher, and both ends of each set of bidirectional electric push rods are connected to the two sets of tail wings respectively through mounting seats. Each set of bidirectional electric push rods is fixedly connected to the bottom of the fertilizer applicator through a mounting frame.

[0011] Preferably, one end of each set of sealing plates penetrates the inside of the discharge pipe, and one end of each set of sealing plates is fixedly connected to one end of each set of bidirectional electric push rods via a connecting rod.

[0012] Compared with the prior art, the beneficial effects of the present invention are: 1. After the fertilizer and holding medium inside the feeding hopper of this invention are mixed, the operator starts two sets of bidirectional electric push rods according to the amount of fertilizer to be applied. The two ends of the two sets of bidirectional electric push rods are adjusted by the mounting base to adjust the angle of movement. At the same time, the two ends of the two sets of bidirectional electric push rods are connected by the connecting rods to open the discharge port of each set of discharge pipes. This allows the opening width of the trench and the opening degree of the two sets of discharge pipes to be adjusted synchronously, so that the discharge amount and the trench width are accurately matched. This ensures that the amount of fertilizer applied per unit trench length is uniform and stable, avoiding over- or under-fertilization. It also simplifies the adjustment operation and improves the adaptability of the device and the consistency of fertilizer application and retention.

[0013] 2. In this invention, the feeding hopper drives the threaded disc to reciprocate inside the piston tube, pushing the gas inside the piston tube. The gas inside the piston tube is transmitted to two sets of second nozzles through the second and third transmission pipes. The two sets of second nozzles then spray the mixture into the two sets of discharge pipes, promoting smooth feeding of the mixture in the discharge pipes and preventing pipe blockage. It also creates continuous disturbance to the mixture, preventing the fertilizer and the holding medium from separating into layers in the discharge pipes due to gravity differences, ensuring uniform and stable discharge, and thus improving the quality of field fertilization and water retention fertilizer operation.

[0014] 3. In this invention, the motor drives the stirring rod to stir the fertilizer and holding medium in the feeding bucket. The water pump delivers the water-retaining agent in the storage tank to the inside of the stirring rod through the first transmission pipe. The water-retaining agent is sprayed into the feeding bucket through multiple sets of first nozzles on the stirring rod. The multiple sets of first nozzles rotate synchronously with the stirring rod, so that the water-retaining agent is evenly sprayed into the fertilizer and holding medium during stirring. This effectively avoids local agglomeration and clumping of the water-retaining agent, improves the uniformity of material mixing, and achieves uniform coating of the fertilizer and holding medium by the water-retaining agent. At the same time, it reduces the phenomenon of material sticking to the wall and stratification, and enhances the subsequent fertilization and water retention and fertilizer fixation effects. Attached Figure Description

[0015] Figure 1 This is one of the overall structural schematic diagrams of the present invention; Figure 2 This is a second schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the hybrid component structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of the structure at point A in the middle; Figure 5 This is a cross-sectional view of the piston tube structure of the present invention; Figure 6 This is a schematic diagram of the fertilizer retention component structure of the present invention; Figure 7 This is a cross-sectional view of the fertilizer retention component structure of the present invention.

[0016] In the diagram: 1. Fertilizer applicator; 2. Mixing assembly; 201. Feeding hopper; 202. Stirring rod; 203. First nozzle; 204. First transmission pipe; 205. Water pump; 206. Storage tank; 207. Motor; 208. Discharge pipe; 209. Synchronous belt; 210. Reciprocating threaded rod; 211. Piston tube; 212. Threaded disc; 213. Second transmission pipe; 214. Third transmission pipe; 215. Second nozzle; 3. Fertilizer retention assembly; 301. Ditch opener; 302. Tail wing; 304. Bidirectional electric push rod; 305. Connecting rod; 306. Sealing plate. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] See Figures 1 to 7 As shown, the present invention provides an integrated device for soil nutrient retention and application, including a fertilizer applicator 1. A mixing component 2 is installed on the fertilizer applicator 1. The mixing component 2 includes a feeding hopper 201, with two sets of discharge pipes 208 at the lower end of the feeding hopper 201. A stirring rod 202 is rotatably connected inside the feeding hopper 201. Multiple sets of first nozzles 203 are provided on the stirring rod 202. One end of each first nozzle 203 is connected to a storage tank 206 via a first transmission pipe 204. The storage tank 206 contains... The storage tank 206 is fixedly installed on the fertilizer applicator 1. The other end of the stirring rod 202 is connected to a reciprocating threaded rod 210 via a synchronous belt 209. A threaded disc 212 is slidably connected to the feeding hopper 201. A piston tube 211 is provided on the outside of the threaded disc 212. A third transmission pipe 214 is connected inside the piston tube 211. A second nozzle 215 is provided at both ends of the third transmission pipe 214. The two sets of second nozzles 215 are respectively installed inside the two sets of discharge pipes 208. The fertilizer retention machine 1 is equipped with a fertilizer retention component 3 at its lower end. The fertilizer retention component 3 includes two sets of furrow openers 301. Two sets of tail wings 302 are rotatably connected inside the two sets of furrow openers 301. A hinge is connected between the two sets of tail wings 302. A bidirectional electric push rod 304 is movably connected between the two sets of tail wings 302. Both ends of the bidirectional electric push rod 304 are fixedly connected to a sealing plate 306 through a connecting rod 305. Both sets of sealing plates 306 are slidably connected to the inside of each set of discharge pipes 208. The staff connects the fertilizer applicator 1 to the tractor, pours the fertilizer and holding medium into the feeding hopper 201, and starts the motor 207 and water pump 205. The motor 207 drives the stirring rod 202 to stir the fertilizer and holding medium in the feeding hopper 201. The water pump 205 transports the water-retaining agent in the storage tank 206 to the stirring rod 202 through the first transmission pipe 204. The water-retaining agent is sprayed into the feeding hopper 201 through multiple sets of first nozzles 203 on the stirring rod 202. The multiple sets of first nozzles 203 rotate synchronously with the stirring rod 202, so that the water-retaining agent is evenly sprayed into the fertilizer and holding medium during stirring. This effectively avoids the local aggregation and clumping of the water-retaining agent, improves the uniformity of material mixing, and achieves uniform coating of the fertilizer and holding medium by the water-retaining agent. At the same time, it reduces the phenomenon of material sticking to the wall and stratification, and enhances the subsequent fertilization and water retention and fertilizer fixation effect. Additionally, the protruding ring at one end of the first transmission pipe 204 is slidably connected to the groove at one end of the stirring rod 202. Therefore, when the first transmission pipe 204 transmits the water-retaining agent into the stirring rod 202, it will not affect the stirring rod 202's stirring of the fertilizer and holding medium in the feeding bucket 201. After the fertilizer and holding medium inside the feeding hopper 201 are mixed, the staff activates two sets of bidirectional electric push rods 304 according to the amount of fertilizer to be applied. The two ends of the two sets of bidirectional electric push rods 304 are adjusted by the mounting base, which simultaneously drives the two sets of tail wings 302 to unfold to adjust the trench width. At the same time, the two ends of the two sets of bidirectional electric push rods 304 are connected by the connecting rods 305 to drive the two sets of sealing plates 306 to open the discharge port of each set of discharge pipes 208. This allows the trench width and the opening of the discharge port of the two sets of discharge pipes 208 to be adjusted synchronously, so that the discharge amount and the trench width are precisely matched, ensuring that the amount of fertilizer applied per unit trench length is uniform and stable, avoiding over- or under-fertilization, while simplifying the adjustment operation and improving the adaptability of the device and the consistency of fertilizer application and retention. After the trench width and the opening of the feeding port are synchronized, the workers start the tractor to drive the fertilizer applicator 1 to open the trench and apply fertilizer, and finally cover it with soil. Because the mixing rod 202 needs to continuously rotate during the fertilizer application process to ensure continuous mixing of the fertilizer and the holding medium, the mixing rod 202 drives the feeding bucket 201 to rotate via the synchronous belt 209. Since the feeding bucket 201 is connected to the threaded disc 212 through a ball nut pair, and the protrusions on the outside of the threaded disc 212 slide on the groove inside the piston tube 211, the feeding bucket 201 rotates... The threaded disc 212 reciprocates inside the piston tube 211, pushing the gas inside the piston tube 211. The gas inside the piston tube 211 is transmitted to two sets of second nozzles 215 through the second transmission pipe 213 and the third transmission pipe 214. The two sets of second nozzles 215 spray the mixture into the two sets of discharge pipes 208, promoting the smooth discharge of the mixture in the discharge pipes 208 and preventing pipe blockage. It also creates continuous disturbance to the mixture, preventing the fertilizer and the holding medium from separating into layers in the discharge pipes 208 due to gravity differences, ensuring uniform and stable discharge, and thus improving the quality of field fertilization and water retention fertilizer operation. Additionally, the intake pipe on piston tube 211 is used to introduce outside air into piston tube 211 to replenish the gas inside piston tube 211 and ensure normal gas transmission in piston tube 211. The one-way valve on the intake pipe is used to ensure that the gas inside piston tube 211 does not leak through the intake pipe.

[0019] In an optional embodiment, both ends of the stirring rod 202 penetrate the interior of the feeding hopper 201, and the end of the stirring rod 202 that communicates with the first transmission pipe 204 is provided with a groove. One end of the first transmission pipe 204 is provided with a convex ring that slides inside the groove. A motor 207 is fixedly installed on the outside of the feeding hopper 201 by a mounting bracket, and the other end of the stirring rod 202 is fixedly connected to the output end of the motor 207.

[0020] It should be noted that the convex ring at one end of the first transmission pipe 204 is slidably connected to the groove at one end of the stirring rod 202. Therefore, when the first transmission pipe 204 transmits the water-retaining agent into the stirring rod 202, it will not affect the stirring rod 202's stirring of the fertilizer and holding medium in the feeding bucket 201.

[0021] In an optional embodiment, a water pump 205 is provided inside the storage box 206, and the other end of the first transmission pipe 204 penetrates through the outer wall of the storage box 206, and the other end of the first transmission pipe 204 is fixedly connected to the output end of the water pump 205.

[0022] It should be noted that the water pump 205 transports the water-retaining agent in the storage tank 206 to the inside of the stirring rod 202 through the first transmission pipe 204, and the water-retaining agent is sprayed into the inside of the feeding bucket 201 through multiple sets of first nozzles 203 on the stirring rod 202.

[0023] In an optional embodiment, the piston tube 211 is fixedly installed on the fertilizer applicator 1, and the piston tube 211 is provided with an air inlet pipe and a one-way valve.

[0024] It should be noted that the intake pipe on the piston tube 211 is used to introduce outside air into the piston tube 211 to replenish the gas inside the piston tube 211 and ensure that the piston tube 211 transmits gas normally. The one-way valve on the intake pipe is used to ensure that the gas inside the piston tube 211 does not leak through the intake pipe.

[0025] In an optional embodiment, one end of the reciprocating threaded rod 210 passes through the interior of the piston tube 211, and one end of the reciprocating threaded rod 210 is connected to the other end of the stirring rod 202 via a timing belt 209. The reciprocating threaded rod 210 is connected to the threaded disc 212 via a ball nut pair. The piston tube 211 has a groove inside, and the threaded disc 212 has a protrusion on the outside that slides inside the groove.

[0026] It should be noted that, since the feed barrel 201 and the threaded disc 212 are connected by a ball nut pair, and the protrusion on the outside of the threaded disc 212 slides on the groove inside the piston tube 211, the feed barrel 201 drives the threaded disc 212 to move back and forth inside the piston tube 211, thus pushing the gas inside the piston tube 211.

[0027] In an optional embodiment, the piston tube 211 is internally connected to a second transmission tube 213, one end of which is internally connected to a third transmission tube 214.

[0028] It should be noted that the gas inside the piston tube 211 is transmitted to the two sets of second nozzles 215 through the second transmission tube 213 and the third transmission tube 214, and the two sets of second nozzles 215 will then spray into the two sets of discharge tubes 208.

[0029] In an optional embodiment, both sets of hinges are installed inside the furrow opener 301, and both ends of each set of bidirectional electric push rods 304 are connected to the two sets of tail wings 302 respectively through mounting seats. Each set of bidirectional electric push rods 304 is fixedly connected to the bottom of the fertilizer applicator 1 through a mounting bracket.

[0030] It should be noted that the two sets of bidirectional electric push rods 304 have their angles adjustable via mounting bases at both ends, which simultaneously drive the two sets of tail wings 302 to unfold in order to adjust the trench width.

[0031] In an optional embodiment, one end of each set of sealing plates 306 penetrates the interior of the discharge pipe 208, and one end of each set of sealing plates 306 is fixedly connected to one end of each set of bidirectional electric push rods 304 via a connecting rod 305.

[0032] It should be noted that the two sets of bidirectional electric push rods 304 drive the two sets of sealing plates 306 to open the discharge port of each set of discharge pipes 208 through the connecting rods 305.

[0033] Working principle: The operator connects the fertilizer applicator 1 to the tractor, pours the fertilizer and holding medium into the feeding hopper 201, starts the motor 207 and water pump 205. The motor 207 drives the stirring rod 202 to stir the fertilizer and holding medium in the feeding hopper 201. The water pump 205 transports the water-retaining agent in the storage tank 206 to the stirring rod 202 through the first transmission pipe 204. The water-retaining agent is sprayed into the feeding hopper 201 through multiple sets of first nozzles 203 on the stirring rod 202. The multiple sets of first nozzles 203 rotate synchronously with the stirring rod 202, so that the water-retaining agent is evenly sprayed into the fertilizer and holding medium during stirring. After the fertilizer and holding medium inside the feeding hopper 201 are mixed, the staff will activate two sets of bidirectional electric push rods 304 according to the amount of fertilizer to be applied. The two ends of the two sets of bidirectional electric push rods 304 can be adjusted in terms of their angle of movement through the mounting base. Simultaneously, the two sets of tail wings 302 will be deployed to adjust the trench width. At the same time, the two ends of the two sets of bidirectional electric push rods 304 will drive the two sets of sealing plates 306 to open the discharge port of each set of discharge pipes 208 through the connecting rods 305, so as to realize the synchronous adjustment of the trench width and the opening degree of the discharge port of the two sets of discharge pipes 208. After the trench width and the opening of the feeding port are synchronized, the workers start the tractor to drive the fertilizer applicator 1 to open the trench and apply fertilizer, and finally cover it with soil. Because the mixing rod 202 needs to continuously rotate during the fertilizer application process to ensure continuous mixing of the fertilizer and the holding medium, the mixing rod 202 drives the feeding bucket 201 to rotate via the synchronous belt 209. Since the feeding bucket 201 is connected to the threaded disc 212 through a ball nut pair, and the threaded disc 212 has external convex... The block slides on the groove inside the piston tube 211, so the feed barrel 201 drives the threaded disc 212 to move back and forth inside the piston tube 211, pushing the gas inside the piston tube 211. The gas inside the piston tube 211 is transmitted to the two sets of second nozzles 215 through the second transmission pipe 213 and the third transmission pipe 214. The two sets of second nozzles 215 will spray into the two sets of discharge pipes 208, promoting the smooth discharge of the mixture in the discharge pipes 208 and preventing pipe blockage, while also creating continuous disturbance to the mixture.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A soil nutrient retention and application integrated device, comprising a fertilizer applicator (1), characterized in that, The fertilizer applicator (1) is equipped with a mixing component (2), which includes a feeding hopper (201). Two sets of discharge pipes (208) are provided at the lower end of the feeding hopper (201). A stirring rod (202) is rotatably connected inside the feeding hopper (201). Multiple sets of first nozzles (203) are provided on the stirring rod (202). One end of each first nozzle (203) is connected to a storage tank (206) via a first transmission pipe (204). The storage tank (206) stores a water-retaining agent. Fixedly installed on the fertilizer applicator (1), the other end of the stirring rod (202) is connected to a reciprocating threaded rod (210) via a synchronous belt (209), a threaded disc (212) is slidably connected on the feeding hopper (201), a piston tube (211) is provided on the outside of the threaded disc (212), a third transmission pipe (214) is connected inside the piston tube (211), and a second nozzle (215) is provided at both ends of the third transmission pipe (214), and the two sets of second nozzles (215) are respectively installed inside the two sets of discharge pipes (208); The fertilizer application and fertilizer retention machine (1) is equipped with a fertilizer retention component (3) at its lower end. The fertilizer retention component (3) includes two sets of furrow openers (301). Two sets of tail wings (302) are rotatably connected inside the two sets of furrow openers (301). A hinge is connected between the two sets of tail wings (302). A bidirectional electric push rod (304) is movably connected between the two sets of tail wings (302). Both ends of the bidirectional electric push rod (304) are fixedly connected to a sealing plate (306) through a connecting rod (305). Both sets of sealing plates (306) are slidably connected to the inside of each set of discharge pipes (208).

2. The integrated soil nutrient retention and application device according to claim 1, characterized in that, Both ends of the stirring rod (202) penetrate the interior of the feeding bucket (201), and the end of the stirring rod (202) that is connected to the first transmission pipe (204) is provided with a groove. One end of the first transmission pipe (204) is provided with a convex ring that slides inside the groove. The motor (207) is fixedly installed on the outside of the feeding bucket (201) by a mounting bracket, and the other end of the stirring rod (202) is fixedly connected to the output end of the motor (207).

3. The integrated soil nutrient retention and application device according to claim 2, characterized in that, The storage box (206) is equipped with a water pump (205). The other end of the first transmission pipe (204) penetrates the outer wall of the storage box (206), and the other end of the first transmission pipe (204) is fixedly connected to the output end of the water pump (205).

4. The integrated soil nutrient retention and application device according to claim 1, characterized in that, The piston tube (211) is fixedly installed on the fertilizer applicator (1). The piston tube (211) is provided with an air inlet pipe and a one-way valve.

5. The integrated device for soil nutrient retention and application according to claim 1, characterized in that, One end of the reciprocating threaded rod (210) penetrates the interior of the piston tube (211), and one end of the reciprocating threaded rod (210) is connected to the other end of the stirring rod (202) via a synchronous belt (209). The reciprocating threaded rod (210) is connected to the threaded disc (212) via a ball nut pair. The piston tube (211) has a groove inside, and the threaded disc (212) has a protrusion on the outside that slides inside the groove.

6. The integrated soil nutrient retention and application device according to claim 1, characterized in that, The piston tube (211) is internally connected to a second transmission tube (213), and one end of the second transmission tube (213) is internally connected to a third transmission tube (214).

7. The integrated device for soil nutrient retention and application according to claim 1, characterized in that, Both sets of hinges are installed inside the trencher (301). Both ends of each set of bidirectional electric push rods (304) are connected to the two sets of tail wings (302) through mounting seats. Each set of bidirectional electric push rods (304) is fixedly connected to the bottom of the fertilizer applicator (1) through a mounting frame.

8. The integrated soil nutrient retention and application device according to claim 1, characterized in that, One end of each of the sealing plates (306) penetrates the inside of the discharge pipe (208), and one end of each of the sealing plates (306) is fixedly connected to one end of each of the bidirectional electric push rods (304) via a connecting rod (305).

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