A precision seeder for field trials

Abstract

The present invention discloses a precision seeder for field tests, comprising a field test nest digger and a seeding assembly. A fertilizer box is provided on the upper portion of a first rolling box, a water storage tank is provided on the upper portion of a second rolling box, a seed box is provided on one side of a main support arm, and the seeding assembly includes an installation box, a seed and fertilizer separation plate is provided in the installation box, and a first spring is provided on the upper portion of the seed and fertilizer separation plate; a double-headed plunger is provided inside each of the water volume box, the seed volume box, and the fertilizer volume box; a strip groove is provided on the side of each of the water volume box, the seed volume box, and the fertilizer volume box near the seed and fertilizer separation plate, and a linkage rod is intermittently provided in the strip groove, one end of the linkage rod is fixedly connected to the double-headed plunger, and the other end of the linkage rod is fixedly connected to the seed and fertilizer separation plate. The present invention is based on the field test nest digger, and is provided with a fertilizer box, a water storage tank, and a seeding assembly. Under the action of the seed and fertilizer separation plate being raised and lowered, seed and fertilizer can be applied in an isolated manner to avoid burning seedlings. The quantitative sowing design can achieve precision sowing and multi-seed sowing, ensuring seedling emergence.

Description

Technical Field

[0001] The invention belongs to the field of seed drills, and in particular relates to a precision seed drill for field tests. Background Art

[0002] Field breeding, cultivation, and plant protection trials often require precise row and nest spacing to ensure accuracy. To address this, our company has developed a field trial nest digging machine (CN113141815B) that achieves precise nest digging. However, after using this nest digger, manual seeding is still required, and test efficiency still needs to be improved.

[0003] Existing seeders have a furrowing blade at the front, a single seed seeder (finger-type, air-suction type, or scoop-wheel type) in the middle, a fertilizer pipe on the side, and a cover plate at the back (covering the seeds and fertilizer). After sowing, the seeds are lightly compacted with wheels. This type of seeder has the following disadvantages:

[0004] 1. It has high requirements for soil, and requires sandy soil, light loam or very fine soil on rotary tillage. Otherwise, it is easy to block the seed pipe and large clods of soil will affect seedling emergence.

[0005] 2. No watering device is designed, resulting in a poor germination rate;

[0006] 3. Planting density is overly dependent on operator operation, soil conditions and seed quality and cannot be used for accurate density testing.

[0007] In addition, the existing seeding machine cannot accurately sow seeds in the holes dug by the field test digging machine, resulting in the sown test crop seeds being inconsistent with the designed row spacing and plant spacing, and the accuracy of the test cannot be guaranteed. Summary of the Invention

[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a precision seeder for field trials to solve the problems of inconsistent row and plant spacing, poor seedling emergence, and the like of the test crop seeds sown by the existing seeder.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A field test precision seeder includes a field test nest digger and a seeding assembly. The field test nest digger adopts the field test nest digger previously applied for by this unit (publication number: CN113141815B), and its structure is not described in detail. A fertilizer box is provided on the upper part of a first rolling box, the upper part of the fertilizer box is provided with a fertilizer inlet, and the lower part of the fertilizer box is provided with a plurality of fertilizer outlets. A water storage tank is provided on the upper part of the second rolling box, the upper part of the water storage tank is provided with a water inlet, and the lower part of the water storage tank is provided with a plurality of water outlets. A seed box is provided on one side of the main support arm, the upper part of the seed box is provided with a seed inlet, and the lower part of the seed box is provided with a seed outlet.

[0011] The spacing between the sowing assembly and the digger is equal to the row spacing of seed sowing, and the sowing assembly includes an installation box, a cover plate is provided on the upper part of the installation box, the cover plate is fixedly installed at the lower end of the main support arm, a seed and fertilizer isolation plate is provided in the installation box, and the seed and fertilizer isolation plate is gap-connected with the bottom plate of the installation box, so that the seed and fertilizer isolation plate slides up and down in the installation box, and a first spring is provided on the upper part of the seed and fertilizer isolation plate, and the upper end of the first spring is against the cover plate; a water amount box is provided on one side of the installation box, a seed amount box is provided on one side of the water amount box, and a fertilizer amount box is provided on the other side of the installation box; the water amount box, the seed amount box and the fertilizer amount box are all provided with a feed port on the upper part and a discharge port on the lower part, and the feed port is provided on the lower part. The feed port and the discharge port are arranged coaxially; the feed port of the water amount box is connected to the water outlet through a hose, the feed port of the seed amount box is connected to the seed outlet through a hose, and the feed port of the fertilizer amount box is connected to the fertilizer outlet through a hose; the water amount box, the seed amount box and the fertilizer amount box are each provided with a double-headed plunger, both ends of the double-headed plunger are conical structures, and the length of the double-headed plunger is smaller than the height of the water amount box, the seed amount box and the fertilizer amount box; the water amount box, the seed amount box and the fertilizer amount box are each provided with a strip groove on one side close to the seed and fertilizer isolation plate, and a linkage rod is intermittently provided in the strip groove, one end of the linkage rod is fixedly connected to the double-headed plunger, and the other end of the linkage rod is fixedly connected to the seed and fertilizer isolation plate.

[0012] Furthermore, a strip plate is fixedly connected to the linkage rod, the strip plate is arranged on the inner side of the strip groove, and the length of the strip plate is greater than the length of the strip groove.

[0013] Furthermore, a telescopic sleeve is slidably sleeved on the outside of the cover plate, and an adjusting bolt is threadedly connected to each of two sides of the telescopic sleeve.

[0014] Furthermore, a front bracket is provided at the front of the mounting frame, and the front bracket is arranged inclined toward the front and lower part. The front end of the front bracket is rotatably connected to a sixth rotating shaft, and a third driven pulley is provided at one end of the sixth rotating shaft, and the third driven pulley is connected to the first driving pulley through a belt; a number of rotary tilling wheels are provided on the sixth rotating shaft, and the two sides of the rotary tilling wheels are adjustably connected to the sixth rotating shaft through bolts.

[0015] Furthermore, a soil screening plate is fixedly connected to the lower portion of the front bracket.

[0016] Furthermore, a seventh rotating shaft is rotatably connected to the middle part of the front bracket, and a plurality of rubber belts are provided on the seventh rotating shaft, and the length of the rubber belt is greater than the vertical distance between the seventh rotating shaft and the upper surface of the screen plate. A fourth driven pulley is provided at one end of the seventh rotating shaft, and the fourth driven pulley is connected to the third driven pulley through a belt, and the fourth driven pulley is connected to the first driving pulley through a belt.

[0017] Furthermore, a rear bracket is provided at the rear of the mounting frame, the rear bracket is a U-shaped structure, a plurality of support rods are provided at the lower part of the rear bracket, a covering plate is provided at the lower part of the support rods, and the covering plate is located directly behind the spiral digging cutter.

[0018] Furthermore, a plurality of sliding sleeves are slidably connected to the rear bracket, and a second fastening bolt is threadedly connected to the sliding sleeve.

[0019] Furthermore, a socket is provided on one side of the sliding sleeve, the support rod is gap-mounted in the socket, an external thread is provided on the upper portion of the support rod, two first nuts are threadedly connected to the support rod, and the two first nuts are respectively located at both ends of the socket.

[0020] Furthermore, the covering plate is a V-shaped structure.

[0021] Furthermore, the water amount box, seed amount box and fertilizer amount box each include a rectangular box section and a corrugated box section, a pull rod is fixedly connected to one side of the corrugated box section, the upper part of the water amount box, seed amount box and fertilizer amount box are each provided with a support plate, the end of the pull rod extends outward from the support plate and is threadedly connected to a second nut, a second spring is provided on the outside of the pull rod, one end of the second spring is against the corrugated box section, and the other end is against the support plate; the lower part of the water amount box, seed amount box and fertilizer amount box is each provided with a second scale.

[0022] The beneficial effects of the present invention are:

[0023] 1) The present invention is equipped with a fertilizer box, a water tank and a sowing assembly based on the field test digging machine. Under the action of the lifting of the seed fertilizer isolation plate, the seed fertilizer can be applied in isolation to avoid burning the seedlings. The quantitative sowing design can realize precise sowing and multi-grain sowing, ensuring emergence of seedlings.

[0024] 2) A strip plate for blocking the strip groove is provided on the linkage rod, thereby preventing seeds, fertilizers and water from leaking out of the water volume box, seed volume box and fertilizer volume box.

[0025] 3) A telescopic sleeve is provided on the outside of the cover plate and is slidably connected to it. The telescopic sleeve cooperates with the cover plate and is adapted to the row spacing adjustment function of the field test nest digger to adjust the distance between the sowing component and the nest digger to ensure accurate sowing of the sowing component after the row spacing of the nest digger is adjusted.

[0026] 4) A front bracket is provided at the front of the mounting frame, and a rotary tillage wheel is provided at the front end of the front bracket to pre-till and loosen the soil, thereby reducing the digging pressure of the digger. In addition, a soil screening plate is provided at the lower part of the front bracket to screen the soil after rotary tillage so that fine-grained soil covers the seeds, which is conducive to seed germination; a rubber belt for beating the soil screening plate is also provided on the front bracket to shake off the soil on the soil screening plate and prevent the soil from clogging the sieve holes of the soil screening plate.

[0027] 5) A rear bracket is set at the rear of the mounting frame, and a position-adjustable V-shaped soil covering plate is set on the rear bracket. After sowing is completed, the soil covering plate will cover the excavated soil in the hole again, thereby improving the efficiency of seed sowing.

[0028] 6) The water volume box, seed volume box and fertilizer volume box all include a rectangular box section and a corrugated box section, which facilitates adjustment of the capacity of the water volume box, seed volume box and fertilizer volume box, thereby realizing adjustment of the water volume, seed volume and fertilizer volume. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Attachment Figure 1 It is a structural schematic diagram of one side of a field test precision seeder of the present invention.

[0030] Attachment Figure 2 This is a structural schematic diagram of the other side of a field test precision seeder of the present invention.

[0031] Attachment Figure 3 The present invention is a schematic diagram of the connection between the first rolling box and the second rolling box in a field test precision seeder.

[0032] Attachment Figure 4 The present invention is a schematic diagram of the structure of a soil covering plate in a field test precision seeder.

[0033] Attachment Figure 5 It is a structural schematic diagram of a mounting frame in a precision seeder for field tests according to the present invention.

[0034] Attachment Figure 6 The present invention is a schematic diagram of the structure of a digger in a field test precision seeder.

[0035] Attachment Figure 7 It is a structural schematic diagram of a sowing component in a precision seeder for field trials of the present invention.

[0036] In the figure: 1, first rolling box; 116, fertilizer box; 3, second rolling box; 303, water tank; 5, mounting frame; 6, digger; 603, main arm; 620, seed box; 7, front bracket; 701, sixth rotating shaft; 702, rotary tiller; 703, third driven pulley; 704, soil screening plate; 705, seventh rotating shaft; 706, rubber belt; 707, fourth driven pulley; 8, rear bracket; 801, support rod; 802, soil cover plate; 803, sliding sleeve; 804, second fastening bolt; 8 05. Socket; 806. First nut; 9. Sowing assembly; 901. Mounting box; 902. First spring; 903. Seed and fertilizer isolation plate; 904. Water volume box; 905. Seed volume box; 906. Fertilizer volume box; 907. Double-headed plunger; 908. Linkage rod; 909. Strip groove; 910. Strip plate; 911. Second scale; 912. Support plate; 913. Pull rod; 914. Second nut; 915. Second spring; 916. Cover plate; 917. Telescopic sleeve; 918. Adjusting bolt. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-7 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure and operation, and therefore cannot be understood as a limitation on the present invention.

[0039] like Figure 1-3 、 Figure 6-7 As shown, a field test precision seeder includes a field test nest digger and a seeding assembly. The field test nest digger adopts the field test nest digger previously applied for by this unit (publication number: CN113141815B), and its structure is not described in detail; a fertilizer box 116 is provided on the upper part of the first rolling box 1, the fertilizer box 116 is provided with a fertilizer inlet on the upper part, and a plurality of fertilizer outlets on the lower part of the fertilizer box 116; a water storage tank 303 is provided on the upper part of the second rolling box 3, the water storage tank 303 is provided with a water inlet on the upper part, and a plurality of water outlets on the lower part of the water storage tank 303; a seed box 620 is provided on one side of the main support arm 603, the seed box 620 is provided with a seed inlet on the upper part, and a seed outlet on the lower part of the seed box 620;

[0040] like Figure 6-7 As shown, the spacing between the sowing component 9 and the digger 6 is equal to the row spacing of the seed sowing, and the sowing component 9 includes an installation box 901, and a cover plate 916 is provided on the upper part of the installation box. The cover plate 916 is fixedly installed at the lower end of the main support arm 603, and a seed fertilizer isolation plate 903 is provided in the installation box 901, and the seed fertilizer isolation plate 903 is gap-connected with the bottom plate of the installation box 901, so that the seed fertilizer isolation plate 903 slides up and down in the installation box 901. A first spring 902 is provided on the upper portion of 903, and the upper end of the first spring 902 is against the cover plate 916; a water volume box 904 is provided on one side of the installation box 901, a seed volume box 905 is provided on one side of the water volume box 904, and a fertilizer volume box 906 is provided on the other side of the installation box 901; the water volume box 904, the seed volume box 905 and the fertilizer volume box 906 are all provided with a feed port on the upper portion and a discharge port on the lower portion, and the feed port and the discharge port are coaxially arranged to ensure that the seeds, water and fertilizer are kept in a stable state. To ensure the accuracy of application, a bamboo tube can be connected to the lower part of the discharge port, and the position of the end of the bamboo tube can be adjusted to make it correspond to the nest; the feed port of the water amount box 904 is connected to the water outlet through a hose, the feed port of the seed amount box 905 is connected to the seed outlet through a hose, and the feed port of the fertilizer amount box 906 is connected to the fertilizer outlet through a hose; the water amount box 904, the seed amount box 905 and the fertilizer amount box 906 are all provided with a double-headed plunger 907, both ends of the double-headed plunger are tapered. shaped structure, and the length of the double-headed plunger 907 is smaller than the height of the water box 904, the seed box 905 and the fertilizer box 906; the water box 904, the seed box 905 and the fertilizer box 906 are each provided with a strip groove 909 on one side close to the seed and fertilizer isolation plate 903, and a linkage rod 908 is gap-arranged in the strip groove 909, one end of the linkage rod 908 is fixedly connected to the double-headed plunger 907, and the other end of the linkage rod 908 is fixedly connected to the seed and fertilizer isolation plate 903.

[0041] like Figure 7 As shown, in this embodiment, a strip plate 910 is fixedly connected to the linkage rod 908, and the strip plate 910 is arranged on the inner side of the strip groove 909, and the length of the strip plate 910 is greater than the length of the strip groove 909 to prevent seeds, fertilizers and water from leaking from the water box 904, the seed box 905 and the fertilizer box 906.

[0042] like Figure 6 As shown, a telescopic sleeve 917 is slidably provided on the outside of the cover plate 916, and an adjusting bolt 918 is threadedly connected on both sides of the telescopic sleeve 917. The telescopic sleeve 917 cooperates with the cover plate 916 and adapts to the row spacing adjustment function of the field test nest digger to adjust the spacing between the sowing component 9 and the nest digger 6 to ensure accurate sowing of the sowing component after the nest digging row spacing of the nest digger is adjusted.

[0043] like Figure 2As shown, a front bracket 7 is provided at the front of the mounting frame 5, and the front bracket 7 is arranged tilted toward the front and lower part. The front end of the front bracket 7 is rotatably connected to the sixth rotating shaft 701, and a third driven pulley 703 is provided at one end of the sixth rotating shaft 701. The third driven pulley 703 is connected to the first active pulley 106 through a belt; a plurality of rotary tilling wheels 702 are provided on the sixth rotating shaft 701, and the two sides of the rotary tilling wheel 702 are adjustably connected to the sixth rotating shaft 701 through bolts. The rotary tilling wheel 702 pre-tills and loosens the soil, thereby reducing the pressure of the nest digger 6 when digging the nest.

[0044] like Figure 2 As shown, in this embodiment, a soil screening plate 704 is fixedly connected to the lower part of the front bracket 7. The soil screening plate 704 screens the soil after rotary tillage so that fine particles of soil cover the seeds, which is conducive to seed germination.

[0045] like Figure 2 As shown, in this embodiment, the middle part of the front bracket 7 is rotatably connected to the seventh rotating shaft 705, and a plurality of rubber belts 706 are provided on the seventh rotating shaft 705, and the length of the rubber belt 706 is greater than the vertical distance between the seventh rotating shaft 705 and the upper surface of the soil screening plate 704, and a fourth driven pulley 707 is provided at one end of the seventh rotating shaft 705, and the fourth driven pulley 707 is connected to the third driven pulley 703 by a belt, and the fourth driven pulley 707 is connected to the first driving pulley 106 by a belt. When the seventh rotating shaft 705 rotates, it drives the rubber belt 706 to intermittently beat the soil screening plate 704, shakes off the soil on the soil screening plate 704, and avoids clogging of the soil screening plate 704.

[0046] like Figure 1 、 Figure 4 As shown, a rear bracket 8 is provided at the rear of the mounting frame 5, and the rear bracket 8 is a U-shaped structure. A plurality of support rods 801 are provided at the lower part of the rear bracket 8, and a covering plate 802 is provided at the lower part of the support rods 801. The covering plate 802 is located directly behind the spiral digging knife 613. After sowing is completed, the excavated soil is covered in the hole again by the covering plate 802, thereby improving the efficiency of seed sowing.

[0047] like Figure 4 As shown, the rear bracket 8 is slidably connected to a plurality of sliding sleeves 803, and the sliding sleeves 803 are threadedly connected to a second fastening bolt 804. The lower end of the second fastening bolt 804 abuts against the upper surface of the rear bracket 8, and is used to adjust the position of the covering plate 802 on the rear bracket 8 so that it is compatible with the digger 6 and the sowing assembly 9.

[0048] like Figure 4As shown, a socket 805 is provided on one side of the sliding sleeve 803, and the support rod 801 is gap-mounted in the socket 805. An external thread is provided on the upper portion of the support rod 801, and two first nuts 806 are threadedly connected to the support rod 801. The two first nuts 806 are respectively located at both ends of the socket 805 for adjusting the height of the covering plate 802.

[0049] like Figure 4 As shown, the covering plate 802 is a V-shaped structure, which ensures the covering effect of the covering plate 802.

[0050] like Figure 7 As shown, the water volume box 904, the seed volume box 905 and the fertilizer volume box 906 all include a rectangular box section and a corrugated box section, and a pull rod 913 is fixedly connected to one side of the corrugated box section. The water volume box 904, the seed volume box 905 and the fertilizer volume box 906 are all provided with a support plate 912 on the upper part. The end of the pull rod 913 extends outward from the outside of the support plate 912 and is threadedly connected to a second nut 914. The outer sleeve of the pull rod 913 is provided with a second spring 915. The second spring One end of 915 is against the corrugated box section, and the other end is against the support plate 912; the corrugated box section is convenient for adjusting the capacity of the water box 904, the seed box 905 or the fertilizer box 906, thereby realizing the adjustment of the water amount, seed amount and fertilizer amount; the lower part of the water box 904, the seed box 905 and the fertilizer box 906 is provided with a second scale 911, which is convenient for intuitively judging the adjusted capacity of the water box 904, the seed box 905 and the fertilizer box 906.

[0051] When sowing, adjust the row spacing, nest spacing, number of nests, nest depth, soil covering depth and seed fertilizer and water usage of the excellent seeder in field tests according to the scale, make a row of nests in advance according to the row spacing, place the sowing component 9 on top of the made nests, the sowing component 9 sows in the previous nest, and the nest digger 6 digs nests in the next row. Specifically: when the main support arm 603 is not lowered, the double-headed plunger 907 blocks the discharge port below the water box 904, seed box 905 or fertilizer box 906, and the feed port on the top of the water box 904, seed box 905 or fertilizer box 906 is in an open state, and the raw materials (water, seeds and fertilizer) descend and fill the fertilizer box 906, water box 904 and seed box 905 respectively. When the main arm 603 descends and the seed fertilizer isolation plate 903 contacts the bottom of the nest, the main arm 603 continues to move downward, and the seed fertilizer isolation plate 903 will drive the double-headed plunger 907 to move upward. At the same time, the first spring 902 is compressed, and the double-headed plunger 907 moves upward to leave the lower end discharge port, while blocking the upper feed port, and seeds, water and fertilizer fall into the prepared nest through the lower end discharge port; at the same time, the front nest digger 6 rotates downward to make a nest, and the rotary tillage wheel 702 loosens and breaks up the soil, and the fine soil passes through the soil screening plate 704 for covering the soil; several rubber belts 706 beat the soil screening plate 704 to knock off large pieces of soil. When the main arm 603 rises, the spring returns to its original state, driving the seed and fertilizer isolation plate 903 downward. The double-headed plunger 907 also moves downward, continuing to block the lower outlet. Seed, water, and fertilizer stop entering the nest. The upper feed port opens, and seeds, water, and fertilizer continue to fill the seed metering box 905, water metering box 904, and fertilizer metering box 906, respectively. This not only achieves precise seed sowing, but also separates the seeds and fertilizer, avoiding seedling burn. Then, the field test fine seed drill continues to move forward during the intermittent motion of sowing and walking. The rotary tiller 702 and rubber belt 706 continue to work, and the cover plate 802 completes the seed covering function, completing the sowing.

[0052] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A field test precision seeder, comprising a field test digger and a sowing assembly, characterized in that: A fertilizer box is provided on the upper portion of the first rolling box, wherein the upper portion of the fertilizer box is provided with a fertilizer inlet, and the lower portion of the fertilizer box is provided with a plurality of fertilizer outlets; a water storage tank is provided on the upper portion of the second rolling box, wherein the upper portion of the water storage tank is provided with a water inlet, and the lower portion of the water storage tank is provided with a plurality of water outlets; a seed box is provided on one side of the main support arm, wherein the upper portion of the seed box is provided with a seed inlet, and the lower portion of the seed box is provided with a seed outlet; The spacing between the sowing assembly and the digger is equal to the row spacing of seed sowing, and the sowing assembly includes an installation box, the upper part of the installation box is provided with a cover plate, the cover plate is fixedly installed at the lower end of the main support arm, a seed and fertilizer isolation plate is provided in the installation box, and the seed and fertilizer isolation plate is gap-connected with the bottom plate of the installation box, so that the seed and fertilizer isolation plate slides up and down in the installation box, and a first spring is provided on the upper part of the seed and fertilizer isolation plate, and the upper end of the first spring is against the inner wall of the cover plate; a water amount box is provided on one side of the installation box, a seed amount box is provided on one side of the water amount box, and a fertilizer amount box is provided on the other side of the installation box; the water amount box, the seed amount box and the fertilizer amount box are all provided with a feed port on the upper part and a discharge port on the lower part, and The feed port and the discharge port are arranged coaxially; the feed port of the water amount box is connected to the water outlet through a hose, the feed port of the seed amount box is connected to the seed outlet through a hose, and the feed port of the fertilizer amount box is connected to the fertilizer outlet through a hose; the water amount box, the seed amount box and the fertilizer amount box are each internally provided with a double-headed plunger, both ends of the double-headed plunger are conical structures, and the length of the double-headed plunger is smaller than the height of the water amount box, the seed amount box and the fertilizer amount box; the water amount box, the seed amount box and the fertilizer amount box are each provided with a strip groove on one side close to the seed and fertilizer isolation plate, and a linkage rod is intermittently provided in the strip groove, one end of the linkage rod is fixedly connected to the double-headed plunger, and the other end of the linkage rod is fixedly connected to the seed and fertilizer isolation plate.

2. A field test precision seeder according to claim 1, characterized in that: The linkage rod is fixedly connected with a strip plate, which is arranged on the inner side of the strip groove, and the length of the strip plate is greater than the length of the strip groove.

3. A field test precision seeder according to claim 1, characterized in that: A telescopic sleeve is slidably sleeved on the outside of the cover plate, and both sides of the telescopic sleeve are threadedly connected with an adjusting bolt.

4. A field test precision seeder according to claim 1, characterized in that: A front bracket is provided at the front of the mounting frame, and the front bracket is arranged inclined forward and downward, and the front end of the front bracket is rotatably connected to the sixth rotating shaft, and a third driven pulley is provided at one end of the sixth rotating shaft, and the third driven pulley is connected to the first driving pulley through a belt; a plurality of rotary tilling wheels are provided on the sixth rotating shaft; the two sides of the rotary tilling wheel are adjustably connected to the sixth rotating shaft through bolts.

5. A field test precision seeder according to claim 4, characterized in that: The lower part of the front bracket is also fixedly connected with a soil screening plate.

6. A field test precision seeder according to claim 4 or 5, characterized in that: A seventh rotating shaft is rotatably connected to the middle of the front bracket, and a plurality of rubber belts are provided on the seventh rotating shaft, and the length of the rubber belts is greater than the vertical distance between the seventh rotating shaft and the upper surface of the screen plate. A fourth driven pulley is provided at one end of the seventh rotating shaft, and the fourth driven pulley is connected to the third driven pulley through a belt, and the fourth driven pulley is connected to the first driving pulley through a belt.

7. The field test precision seeder according to claim 6, characterized in that: A rear bracket is provided at the rear of the mounting frame, and the rear bracket is a U-shaped structure. A plurality of support rods are provided at the lower part of the rear bracket, and a covering plate is provided at the lower part of the support rods. The covering plate is located directly behind the spiral digging cutter, and the covering plate is a V-shaped structure.

8. The field test precision seeder according to claim 7, characterized in that: A plurality of sliding sleeves are slidably connected to the rear bracket, and a second fastening bolt is threadedly connected to the sliding sleeves.

9. The field test precision seeder according to claim 8, characterized in that: A socket is provided on one side of the sliding sleeve, and the support rod is installed in the socket with a gap. An external thread is provided on the upper part of the support rod, and two first nuts are threadedly connected to the support rod, and the two first nuts are respectively located at both ends of the socket.

10. The field test precision seeder according to claim 1, characterized in that: The water amount box, seed amount box and fertilizer amount box all include a rectangular box section and a corrugated box section, a pull rod is fixedly connected to one side of the corrugated box section, and the upper part of the water amount box, seed amount box and fertilizer amount box are all provided with a support plate, the end of the pull rod extends out of the outside of the support plate and is threadedly connected to a second nut, and a second spring is provided on the outside of the pull rod, one end of the second spring is against the corrugated box section, and the other end is against the support plate; the lower part of the water amount box, seed amount box and fertilizer amount box is provided with a second scale.

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