Planting method of selenium-rich fruits and vegetables

Abstract

The invention relates to the technical field of fruit and vegetable planting, in particular to a selenium-rich fruit and vegetable planting method.The selenium-rich fruit and vegetable planting device comprises a storage table and a handrail, a base is fixedly connected to the outer wall of the top end of the storage table, a water storage tank is installed on the outer wall of one side of the top end of the storage table, and a fertilizer storage tank is installed on the outer wall of the other side of the top end of the storage table; a circular hole is formed in the outer wall of the top end of the base, a fertilizing pipe is inserted into the inner wall of the circular hole, mounting grooves are formed in the outer walls of the two sides of the top of the fertilizing pipe, a mounting hole is formed in the outer wall of one side of each mounting groove, and a movable rod is rotationally arranged on the inner wall of each mounting hole; it is guaranteed that when the supporting pipe slides upwards under the action of buoyancy, the telescopic pipe shrinks, the sliding pipe cannot slide to close the feeding structure at the first time, when the supporting pipe slides downwards under the action of gravity, the telescopic pipe stretches, the sliding pipe cannot slide to open the feeding structure at the first time, long-time fertilizer slow release is guaranteed, and the planting efficiency of selenium-rich fruits and vegetables is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fruit and vegetable planting, in particular to a method for planting selenium-rich fruits and vegetables. Background Art

[0002] Selenium-rich vegetables are vegetables rich in the trace element selenium. Applying selenium-rich fertilizers during the planting process is conducive to the healthy growth of selenium-rich vegetables. In order to continuously and slowly fertilize selenium-rich vegetables, the volatilization rate of selenium-rich fertilizers is often delayed. However, if granular selenium-rich fertilizers are directly sprinkled on the soil, the fertilizer volatilizes quickly. If selenium-rich fertilizers with fine-pore packaging bags are buried in the soil, the degradation of the packaging bags can easily cause environmental pollution.

[0003] After searching the Chinese patent with publication number CN217564126U, a selenium-rich fertilizer slow-release device for selenium-rich vegetable cultivation is disclosed. A water tank and a fertilizer tank are set at the top of the fertilizer rod, water and fertilizer are placed inside the water tank and the fertilizer tank, the flow rate of the control valve and the valve are adjusted, and the fertilizer dissolves in the fertilizer rod and seeps into the soil when it meets water, thereby achieving a slow-release effect; a permeable net is set to prevent a large amount of soil from entering the fertilizer rod, causing blockage and inability to use the fertilizer rod normally; a pointed head is threadedly connected to the bottom end of the fertilizer rod, and the inside of the fertilizer rod can be cleaned by removing the pointed head at the bottom end of the fertilizer rod; a motor and a rotating shaft are set, and in conjunction with the external thread on the outer surface of the fertilizer rod, it is convenient for staff to quickly insert the fertilizer rod into the ground, thereby improving work.

[0004] Based on the above search and combined with the existing technology, it was found that: in the process of planting selenium-rich fruits and vegetables, a slow-release structure is needed to fertilize the land where fruits and vegetables are planted. Slow-release fertilization usually takes several months. The existing slow-release device generally simply releases the fertilizer into the soil through a pipe, and controls the slow-release speed of the fertilizer by controlling the flow rate of water and fertilizer. However, the fertilizer penetration speed of this uninterrupted slow-release device is still too fast. If a drive structure such as a motor is used for control, not only is the slow-release cost high, but there are also problems with battery life and wiring, which affect the planting efficiency of selenium-rich fruits and vegetables. Summary of the Invention

[0005] The object of the present invention is to provide a method for growing selenium-rich fruits and vegetables to solve the problems raised in the above background technology.

[0006] The technical solution of the present invention is: a method for growing selenium-rich fruits and vegetables, comprising the following steps:

[0007] S1. Prepare selenium-rich fruit and vegetable seeds, prepare selenium-rich seed water-soluble fertilizer, place the selenium-rich fruit and vegetable seeds into the evenly stirred water-soluble fertilizer, and ferment until a strong aroma is produced, indicating that the fermentation is complete;

[0008] S2. Select the land for planting and plow and prepare the land;

[0009] S3, sowing the selenium-enriched seeds fermented in S1 on the plowed land, and watering them regularly after sowing and planting;

[0010] S4. Place the selenium-rich water-soluble fertilizer required for the growth of selenium-rich fruits and vegetables into a fertilizer slow-release device. The fertilizer slow-release device slowly delivers the selenium-rich water-soluble fertilizer into the soil during the growth period of the selenium-rich fruits and vegetables to ensure growth needs;

[0011] S5. Harvest selenium-rich fruits and vegetables promptly after they have grown and matured;

[0012] Among them, the fertilizer slow-release device in S4 includes a storage platform and an armrest, the top outer wall of the storage platform is fixedly connected to the base, one side outer wall of the top of the storage platform is installed with a water tank, and the other side outer wall of the top of the storage platform is installed with a fertilizer storage box, the top outer wall of the base is provided with a circular hole, the inner wall of the circular hole is plugged with a fertilizer pipe, the outer walls on both sides of the top of the fertilizer pipe are provided with mounting grooves, one side outer wall of the mounting groove is provided with a mounting hole, the inner wall of the mounting hole is rotatably provided with a movable rod, the outer walls at both ends of the movable rod are fixedly connected with a shielding plate, the outer walls on both sides of the movable rod are fixedly connected with gears, the top inner wall of the fertilizer pipe is slidably connected with a sliding tube, the outer walls on both sides of the bottom end of the sliding tube are provided with connecting grooves, and the connecting grooves are provided with connecting grooves. A rack is fixedly connected to the inner wall of one side, and the rack is meshed with the gear, and the outer wall of the bottom end of the sliding tube is fixedly connected to a telescopic tube, and the outer wall of the bottom end of the telescopic tube is fixedly connected to a support tube, and the outer wall of the bottom end of the support tube is fixedly connected to a ring frame, and an air bag is installed on the outer wall of the bottom end of the ring frame, and a feed hole 1 is provided on the outer wall of the bottom end of all the baffles, and a feed hole 2 is provided on the bottom inner wall of all the mounting grooves, and connecting holes are provided on the outer walls of both sides of the base, and the connecting holes are adapted to the sizes of feed hole 1 and feed hole 2, a water inlet pipe is provided on the outer wall of one side of the bottom of the water storage tank, a fertilizer inlet pipe is provided on the outer wall of one side of the bottom end of the fertilizer storage box, a spiral leaf 1 is provided on the outer wall of the bottom of the fertilizer pipe, and a slow-release hole is provided on the outer wall of the bottom of the fertilizer pipe.

[0013] Preferably, the water inlet pipe and the fertilizer inlet pipe are respectively fixedly connected to the inner walls of the connecting holes on both sides of the base, the baffle is arranged in a circular shape, the baffle is slidably connected to the inner wall of the installation groove, and the fertilizer pipe is slidably connected to the inner wall of the storage table.

[0014] Preferably, a cross-shaped groove is provided on the top outer wall of the fertilizer pipe, a motor is installed on the inner wall of the handrail, one end of the motor output shaft is connected to a drive rod through a coupling, and a cross-shaped protrusion is provided on the bottom outer wall of the drive rod, and the cross-shaped protrusion is adapted to the size of the cross-shaped groove.

[0015] Preferably, positioning rods are fixedly connected to the four corners of the outer wall of the bottom end of the storage table, the positioning rods and the bottom of the fertilizer pipe are both conical, the slow-release holes are distributed in a circular array, and the inner walls of all the slow-release holes are provided with a permeable net.

[0016] Preferably, a limit plate is fixedly connected to the top outer wall of the fertilizer pipe, and the limit plate is arranged in a ring shape, and the size of the limit plate is adapted to the base and the circular hole.

[0017] Preferably, the airbag is arranged in an annular shape, through holes are opened at the four corners of the top outer wall of the annular frame, the airbag is adapted to the size of the support tube and the annular frame, and a conical block is fixedly connected to the top outer wall of the annular frame.

[0018] Preferably, the inner wall of the telescopic tube is fixedly connected with spiral blade 2 and spiral blade 3 in sequence from top to bottom, and the spiral blade 2 and spiral blade 3 are in opposite directions.

[0019] Preferably, a plurality of circular grooves are provided on the outer wall of the other side of the baffle plate, and the circular grooves are distributed in a ring array. Balls are rotatably provided on the inner walls of all the circular grooves, and the balls are rollingly connected to the inner wall of the mounting groove. A rectangular groove is provided on the outer wall of the sliding tube, and a plurality of pulleys are rotatably provided on the inner wall of the rectangular groove, and the pulleys are slidably connected to the inner wall of the fertilizer tube.

[0020] The present invention provides a method for growing selenium-rich fruits and vegetables through improvements, which has the following improvements and advantages compared with the prior art:

[0021] First: The present invention is provided with a storage platform, a fertilizer pipe, a sliding pipe, a baffle, a telescopic pipe, a ring frame and an air bag. The buoyancy of the air bag drives the movement of the structure to control the opening and closing of the feed hole. When the fertilizer pipe is filled with water and fertilizer, the air bag drives the support pipe and the telescopic pipe to lift the sliding pipe, thereby cooperating with the engagement of the gear and the rack to drive the movable rod and the baffle to rotate, so that the feed hole 1 and the feed hole 2 are staggered and closed to prevent the entry of fertilizer and water. After the water and fertilizer in the fertilizer pipe are mixed and enter the soil, the liquid level drops, and the support pipe and other structures drive the sliding pipe to slide down under the action of gravity, thereby rotating the baffle, and the feed hole 1 and the feed hole 2 are staggered and closed. Hole 2 is aligned again to carry out a new round of fertilizer feeding and slow release. The buoyancy effect is cleverly used to control the movement of the structure, thereby controlling the fertilizer feeding, ensuring low cost while avoiding problems with endurance and lines. The sliding tube and the support tube are connected by a telescopic tube, so that there is a certain buffer when the support tube moves up and down, ensuring that when the support tube slides up under the action of buoyancy, the telescopic tube contracts, and the sliding tube does not slide to close the feeding structure immediately. When the support tube slides down under the action of gravity, the telescopic tube stretches, and the sliding tube does not slide to open the feeding structure immediately, ensuring long-term fertilizer slow release and improving the planting efficiency of selenium-rich fruits and vegetables.

[0022] Secondly, the present invention is provided with a telescopic tube, spiral blade two and spiral blade three. When water and water-soluble fertilizer enter the fertilization pipe and flow through the telescopic tube, they flow along the channel formed by spiral blade two and spiral blade three. Spiral blade two and spiral blade three are arranged in opposite directions, and water and fertilizer also flow in opposite directions. This improves the uniformity of fertilizer mixing while ensuring low cost, and further improves the slow-release fertilization effect.

[0023] Third: The present invention is provided with a baffle, a ball, a conical block, a sliding tube and a pulley. A ball is provided on the other side of the baffle to convert the sliding friction between the baffle and the mounting groove into rolling friction, thereby reducing the friction and further preventing the occurrence of structural blockage. A pulley is provided on the outer wall of the sliding tube to reduce the friction of the sliding tube. A conical block is provided on the top of the annular frame to prevent the fertilizer from staying above the annular frame, resulting in insufficient fertilizer mixing and affecting the fertilization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further explained below in conjunction with the accompanying drawings and examples:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 1. It is an exploded schematic diagram of the connection structure between the fertilizer pipe and the driving rod of the present invention;

[0027] Figure 3 2 is a cross-sectional schematic diagram of the connection structure of the fertilizer pipe of the present invention;

[0028] Figure 4 This is an exploded schematic diagram of the base and fertilizer pipe connection structure of the present invention;

[0029] Figure 5 This is an exploded schematic diagram of the shield plate connection structure of the present invention;

[0030] Figure 6 It is a schematic diagram of the sliding pipe connection structure of the present invention;

[0031] Figure 7 This is an exploded schematic diagram of the sliding pipe connection structure of the present invention;

[0032] Figure 8 This is an exploded schematic diagram of the telescopic tube connection structure of the present invention;

[0033] Figure 9 It is an exploded schematic diagram of the annular frame connection structure of the present invention.

[0034] Description of reference numerals:

[0035] 1. Storage table; 2. Water tank; 3. Positioning rod; 4. Base; 5. Fertilizer storage box; 6. Drive rod; 7. Handrail; 8. Motor; 9. Fertilizer pipe; 10. Spiral blade 1; 11. Slow-release hole; 12. Cross-shaped protrusion; 13. Cross-shaped groove; 14. Mounting groove; 15. Water inlet pipe; 16. Fertilizer inlet pipe; 17. Sliding pipe; 18. Telescopic pipe; 19. Support pipe; 20. Ring frame; 21. Airbag; 22. Limit plate; 23. Shielding plate; 24. Connecting hole; 25. Feed hole 1; 26. Feed hole 2; 27. Ball bearing; 28. Movable rod; 29. ​​Pulley; 30. Rack; 31. Gear; 32. Spiral blade 2; 33. Spiral blade 3; 34. Conical block. DETAILED DESCRIPTION

[0036] The present invention is described in detail below, clearly and completely describing the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] The present invention provides a method for growing selenium-rich fruits and vegetables through improvement. The technical solution of the present invention is:

[0038] like Figures 1-9 As shown, a method for growing selenium-rich fruits and vegetables comprises the following steps:

[0039] S1. Prepare selenium-rich fruit and vegetable seeds, prepare selenium-rich seed water-soluble fertilizer, place the selenium-rich fruit and vegetable seeds into the evenly stirred water-soluble fertilizer, and ferment until a strong aroma is produced, indicating that the fermentation is complete;

[0040] S2. Select the land for planting and plow and prepare the land;

[0041] S3, sowing the selenium-enriched seeds fermented in S1 on the plowed land, and watering them regularly after sowing and planting;

[0042] S4. Place the selenium-rich water-soluble fertilizer required for the growth of selenium-rich fruits and vegetables into a fertilizer slow-release device. The fertilizer slow-release device slowly delivers the selenium-rich water-soluble fertilizer into the soil during the growth period of the selenium-rich fruits and vegetables to ensure growth needs;

[0043] S5. Harvest selenium-rich fruits and vegetables promptly after they have grown and matured;

[0044] Among them, the fertilizer slow-release device in S4 includes a storage table 1 and an armrest 7. The top outer wall of the storage table 1 is fixedly connected to the base 4, the outer wall on one side of the top of the storage table 1 is installed with a water tank 2, and the outer wall on the other side of the top of the storage table 1 is installed with a fertilizer storage box 5. A circular hole is provided on the top outer wall of the base 4, and a fertilizer pipe 9 is inserted into the inner wall of the circular hole. The outer walls on both sides of the top of the fertilizer pipe 9 are provided with mounting grooves 14, and a mounting hole is provided on one side of the outer wall of the mounting groove. A movable rod 28 is rotatably provided on the inner wall of the mounting hole. The outer walls at both ends of the movable rod 28 are fixedly connected with a baffle 23, and the outer walls on both sides of the movable rod 28 are fixedly connected with a gear 31. The top inner wall of the fertilizer pipe 9 is slidably connected with a sliding tube 17, and the outer walls on both sides of the bottom end of the sliding tube 17 are provided with connecting grooves, and the inner wall on one side of the connecting groove is fixedly connected with a rack. 30, the rack 30 is meshed with the gear 31, the bottom outer wall of the sliding tube 17 is fixedly connected with the telescopic tube 18, the bottom outer wall of the telescopic tube 18 is fixedly connected with the support tube 19, the bottom outer wall of the support tube 19 is fixedly connected with the annular frame 20, the bottom outer wall of the annular frame 20 is installed with an air bag 21, the bottom outer wall of all the baffles 23 is provided with a feed hole 25, the bottom inner wall of all the mounting grooves 14 is provided with a feed hole 26, the outer walls on both sides of the base 4 are provided with connecting holes 24, the connecting holes 24 are adapted to the size of the feed hole 1 25 and the feed hole 2 26, the outer wall on one side of the bottom of the water tank 2 is provided with a water inlet pipe 15, the outer wall on one side of the bottom of the fertilizer storage box 5 is provided with a fertilizer inlet pipe 16, the bottom outer wall of the fertilizer pipe 9 is provided with a spiral leaf 10, and the bottom outer wall of the fertilizer pipe 9 is provided with a slow-release hole 11.

[0045] Furthermore, the water inlet pipe 15 and the fertilizer inlet pipe 16 are respectively fixedly connected to the inner walls of the connecting holes 24 on both sides of the base 4, the baffle plate 23 is arranged in a circular shape, and the baffle plate 23 is slidably connected to the inner wall of the mounting groove 14. The fertilizer pipe 9 is slidably connected to the inner wall of the storage table 1. A cross groove 13 is provided on the top outer wall of the fertilizer pipe 9. A motor 8 is installed on the inner wall of the handrail 7. One end of the output shaft of the motor 8 is connected to the drive rod 6 through a coupling. A cross-shaped protrusion 12 is provided on the outer wall of the bottom end of the drive rod 6. The cross-shaped protrusion 12 is adapted to the size of the cross-shaped groove 13. Starting the motor 8 drives the drive rod 6 to rotate, thereby cooperating with the cross-shaped groove 13 and the cross-shaped protrusion 12 to drive the fertilizer pipe 9 to rotate, thereby penetrating into the soil.

[0046] Furthermore, positioning rods 3 are fixedly connected to the four corners of the outer wall of the bottom end of the storage platform 1. The positioning rods 3 and the bottom of the fertilizer pipe 9 are both conical, and the slow-release holes 11 are distributed in a ring array. The inner walls of all the slow-release holes 11 are provided with a permeable net.

[0047] Furthermore, the top outer wall of the fertilizing pipe 9 is fixedly connected with a limiting plate 22, which is arranged in a ring shape. The limiting plate 22 is adapted to the size of the base 4 and the circular hole. The airbag 21 is arranged in a ring shape. Through holes are opened at the four corners of the top outer wall of the annular frame 20. The airbag 21 is adapted to the size of the support pipe 19 and the annular frame 20. The top outer wall of the annular frame 20 is fixedly connected with a conical block 34. The limiting plate 22 is provided on the top outer wall of the fertilizing pipe 9, so that the fertilizing pipe 9 is limited after penetrating a certain depth into the soil, and it is also ensured that the feed hole 26 is aligned with the connecting holes 24 on both sides of the base 4 after the fertilizing pipe 9 penetrates a certain depth to ensure stable feeding.

[0048] Furthermore, the inner wall of the telescopic tube 18 is fixedly connected with spiral leaves 2 32 and spiral leaves 33 in sequence from top to bottom. The spiral leaves 2 32 and spiral leaves 33 are in opposite directions. The spiral leaves 2 32 and spiral leaves 33 are arranged in the innermost pipe of the telescopic tube 18. Water and water-soluble fertilizer flow in opposite directions when entering the fertilizer pipe 9 and flowing through the telescopic tube 18. The fertilizer mixing uniformity is improved without the help of a driving structure, and the slow-release fertilization effect is further improved.

[0049] Furthermore, a plurality of circular grooves are provided on the outer wall of the other side of the baffle plate 23, and the circular grooves are distributed in a ring array. Balls 27 are rotatably provided on the inner walls of all the circular grooves, and the ball 27 is rollingly connected to the inner wall of the mounting groove 14. A rectangular groove is provided on the outer wall of the sliding tube 17, and a plurality of pulleys 29 are rotatably provided on the inner wall of the rectangular groove, and the pulley 29 is slidingly connected to the inner wall of the fertilizer tube 9, so that the sliding friction between the baffle plate 23 and the mounting groove 14 is converted into rolling friction, reducing the friction force to further prevent the occurrence of structural blockage. The pulley 29 is provided on the outer wall of the sliding tube 17 to reduce the friction force of the sliding tube 17 when it moves.

[0050] Working principle: During the planting process of selenium-rich fruits and vegetables, when slow-release fertilizer is applied to the planted land, the storage platform 1 is placed on the land, the handrail 7 is held, and the motor 8 is started to drive the driving rod 6 to rotate, thereby cooperating with the cross-shaped groove 13 and the cross-shaped protrusion 12 to drive the fertilizer pipe 9 to rotate, thereby penetrating into the land. After the fertilizer pipe 9 penetrates to a certain depth, the driving rod 6 stops rotating, and the driving rod 6 and the fertilizer pipe 9 are separated to place the storage platform 1 at the next position and penetrate the fertilizer pipe 9. After the fertilizer pipe 9 is placed, the feeding hole on the installation groove 14 is installed. The height of the second hole 26 is just aligned with the height of the connecting hole 24 on the base 4. At this time, the sliding tube 17, the telescopic tube 18, the support tube 19, the annular frame 20 and the air bag 21 are located at the bottom of the fertilizer pipe 9 under the action of gravity. The telescopic tube 18 is in a stretched state. The feed hole 1 25 on the shielding plate 23 is aligned with the feed hole 2 26 in the mounting groove 14. The water in the water storage tank 2 and the fertilizer in the fertilizer storage tank 5 enter the fertilizer pipe 9 through the water inlet pipe 15 and the fertilizer inlet pipe 16. The fertilizer slow release speed is much lower than the feeding speed. The water is mixed with the water-soluble fertilizer. The material causes the liquid level to rise gradually. Under the action of buoyancy, the airbag 21 drives the annular frame 20 and the support tube 19 to rise, the telescopic tube 18 contracts, and the sliding tube 17 will not slide at the first time. When the telescopic tube 18 is fully contracted, the sliding tube 17 is supported to slide up, and the racks 30 on both sides of the sliding tube 17 are engaged with the gears 31 on the movable rod 28, thereby driving the movable rod 28 to rotate through the linkage, and the shielding plate 23 rotates accordingly to stagger the feeding hole 1 25 and the feeding hole 2 26, so that water and fertilizer will no longer enter, and the fertilizer in the fertilizing tube 9 will gradually The fertilizer penetrates into the soil through the infiltration net in the slow-release hole 11. During a period of slow release, the liquid level in the fertilizing tube 9 drops, and the support tube 19, the annular frame 20 and the air bag 21 also drop accordingly. The telescopic tube 18 gradually stretches, and the sliding tube 17 will not slide down at the first time. When the telescopic tube 18 is fully opened, the sliding tube 17 slides downward under the action of gravity of the support tube 19 and other structures, and the linkage makes the feed hole 1 25 on the baffle plate 23 aligned with the feed hole 2 26 in the installation groove 14 again, and a new round of slow release of fertilizer is repeated.

[0051] A limit plate 22 is provided on the top outer wall of the fertilizing pipe 9, so that the fertilizing pipe 9 is limited after it penetrates a certain depth into the soil, and it is also ensured that the second feed hole 26 is aligned with the connecting holes 24 on both sides of the base 4 after the fertilizing pipe 9 penetrates a certain depth to ensure stable feeding. The spiral blade 10 at the bottom of the fertilizing pipe 9 is convenient for insertion into the ground, and the four positioning rods 3 on the top of the storage table 1 are convenient for positioning to ensure structural stability. The second spiral blade 32 and the third spiral blade 33 are provided in the innermost pipe of the telescopic tube 18. Water and water-soluble fertilizer flow in opposite directions when entering the interior of the fertilizing pipe 9 and flowing through the telescopic tube 18, thereby improving the uniformity of fertilizer mixing without the aid of a driving structure and further improving the slow-release fertilization effect.

[0052] The water inlet pipe 15 and the fertilizer inlet pipe 16 are both arranged at an angle to facilitate the entry of water and fertilizer into the fertilizing pipe 9. A ball 27 is provided on the baffle plate 23 to convert the sliding friction between the baffle plate 23 and the mounting groove 14 into rolling friction, thereby reducing the friction and further preventing the occurrence of structural blockage. A pulley 29 is provided on the outer wall of the sliding tube 17 to reduce the friction of the sliding tube 17. A conical block 34 is provided on the top of the annular frame 20 to prevent the fertilizer from staying above the annular frame 20, resulting in insufficient fertilizer mixing and affecting the fertilization effect.

[0053] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include technical solutions composed of equivalent replacements of the above technical features. Matters not covered in the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A method for growing selenium-rich fruits and vegetables, characterized in that: The following steps are involved: S1. Prepare selenium-rich fruit and vegetable seeds, prepare selenium-rich seed water-soluble fertilizer, put the selenium-rich fruit and vegetable seeds into the evenly stirred water-soluble fertilizer and ferment until a strong aroma is produced, indicating that the fermentation is complete; S2. Select the land for planting, plow and prepare the land; S3, sowing the selenium-enriched seeds fermented in S1 on the tilled land, and watering them regularly after sowing and planting; S4, placing the selenium-rich water-soluble fertilizer required for the growth of selenium-rich fruits and vegetables into the fertilizer slow-release device, and the fertilizer slow-release device slowly delivers the selenium-rich water-soluble fertilizer into the soil during the growth period of the selenium-rich fruits and vegetables to ensure the growth needs; S5. Harvest selenium-rich fruits and vegetables promptly after they grow and mature; The fertilizer slow-release device in S4 comprises a storage platform (1) and an armrest (7); the top outer wall of the storage platform (1) is fixedly connected to a base (4); a water storage tank (2) is installed on one side outer wall of the top of the storage platform (1); a fertilizer storage tank (5) is installed on the other side outer wall of the top of the storage platform (1); a circular hole is opened on the top outer wall of the base (4); a fertilizer pipe (9) is inserted into the inner wall of the circular hole; installation grooves (14) are opened on both sides of the outer wall of the top of the fertilizer pipe (9); A mounting hole is provided on one side outer wall of the mounting groove (14), a movable rod (28) is rotatably provided on the inner wall of the mounting hole, shielding plates (23) are fixedly connected to the outer walls at both ends of the movable rod (28), gears (31) are fixedly connected to the outer walls at both sides of the movable rod (28), a sliding tube (17) is slidably connected to the inner wall of the top of the fertilizer application tube (9), connecting grooves are provided on the outer walls at both sides of the bottom end of the sliding tube (17), a rack (30) is fixedly connected to the inner wall of one side of the connecting groove, and the The rack (30) is meshed with the gear (31); the outer wall of the bottom end of the sliding tube (17) is fixedly connected to a telescopic tube (18); the outer wall of the bottom end of the telescopic tube (18) is fixedly connected to a support tube (19); the outer wall of the bottom end of the support tube (19) is fixedly connected to an annular frame (20); the outer wall of the bottom end of the annular frame (20) is installed with an air bag (21); the outer wall of the bottom end of all the shielding plates (23) is provided with a feed hole (25); the inner wall of the bottom end of all the mounting grooves (14) is provided with a There is a second feeding hole (26), the outer walls on both sides of the base (4) are provided with connecting holes (24), the connecting holes (24) are adapted to the size of the first feeding hole (25) and the second feeding hole (26), the outer wall on one side of the bottom of the water storage tank (2) is provided with a water inlet pipe (15), the outer wall on one side of the bottom end of the fertilizer storage tank (5) is provided with a fertilizer inlet pipe (16), the outer wall on the bottom of the fertilizer pipe (9) is provided with a spiral blade (10), and the outer wall on the bottom of the fertilizer pipe (9) is provided with a slow-release hole (11).

2. A method for planting selenium-rich fruits and vegetables according to claim 1, characterized in that: The water inlet pipe (15) and the fertilizer inlet pipe (16) are respectively fixedly connected to the inner walls of the connecting holes (24) on both sides of the base (4); the shielding plate (23) is arranged in a circular shape; the shielding plate (23) is slidably connected to the inner wall of the installation groove (14); and the fertilizer pipe (9) is slidably connected to the inner wall of the storage platform (1).

3. A method for planting selenium-rich fruits and vegetables according to claim 1, characterized in that: The top outer wall of the fertilizer pipe (9) is provided with a cross-shaped groove (13), the inner wall of the handrail (7) is provided with a motor (8), one end of the output shaft of the motor (8) is connected to a driving rod (6) via a coupling, and the bottom outer wall of the driving rod (6) is provided with a cross-shaped protrusion (12), and the size of the cross-shaped protrusion (12) is adapted to the size of the cross-shaped groove (13).

4. A method for planting selenium-rich fruits and vegetables according to claim 1, characterized in that: Positioning rods (3) are fixedly connected at the four corners of the outer wall at the bottom end of the storage platform (1); the positioning rods (3) and the bottom of the fertilizer pipe (9) are both arranged in a conical shape; the slow-release holes (11) are distributed in a circular array; and the inner walls of all the slow-release holes (11) are provided with permeable nets.

5. The method for planting selenium-rich fruits and vegetables according to claim 1, characterized in that: The top outer wall of the fertilizing pipe (9) is fixedly connected to a limit plate (22), the limit plate (22) is arranged in a ring shape, and the limit plate (22) is adapted to the size of the base (4) and the circular hole.

6. The method for planting selenium-rich fruits and vegetables according to claim 1, characterized in that: The airbag (21) is arranged in an annular shape, through holes are provided at four corners of the top outer wall of the annular frame (20), the airbag (21) is adapted to the size of the support tube (19) and the annular frame (20), and a conical block (34) is fixedly connected to the top outer wall of the annular frame (20).

7. The method for planting selenium-rich fruits and vegetables according to claim 1, characterized in that: The inner wall of the telescopic tube (18) is fixedly connected with spiral blade 2 (32) and spiral blade 3 (33) in sequence from top to bottom, and the spiral blade 2 (32) and spiral blade 3 (33) are in opposite directions.

8. The method for planting selenium-rich fruits and vegetables according to claim 1, characterized in that: The outer wall of the other side of the shielding plate (23) is provided with a plurality of circular grooves, the circular grooves are distributed in a ring array, the inner walls of all the circular grooves are rotatably provided with balls (27), the balls (27) are rollingly connected to the inner wall of the mounting groove (14), the outer wall of the sliding tube (17) is provided with a rectangular groove, the inner wall of the rectangular groove is rotatably provided with a plurality of pulleys (29), the pulleys (29) are slidably connected to the inner wall of the fertilizer tube (9).

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