Auxiliary device and method for grafting under rhizome of wild jujube seedling

Abstract

The invention relates to the technical field of rootstock grafting, and discloses a wild jujube seedling rootstock lower grafting auxiliary device which comprises two symmetrically-arranged supports, a cutting knife arranged between the supports and scion forming units arranged on the supports. The scion forming unit comprises moving parts arranged on the two supports respectively and adjusting parts arranged on the moving parts. The moving part comprises moving assemblies symmetrically arranged on the two sides of the blade and clamping assemblies arranged on the moving assemblies. The moving assembly comprises moving holes formed in supporting rods on the two sides of the support. During grafting, the cutting knives on the two sides are moved and adjusted to a proper cutting distance through the moving component, and then the cutting angles of the two cutting knives during cutting are adjusted through the adjusting component, so that a scion and a stock can be tightly attached during grafting, and the grafting survival rate can be increased.

Description

Technical Field

[0001] The invention relates to the technical field of rhizome grafting, and in particular to an auxiliary device and method for grafting below the rhizome of a sour jujube seedling. Background Art

[0002] The sour jujube seedlings refer to independent individuals grown from direct sowing or transplanting from the sour jujube tree. The sour jujube seedlings have the characteristics of short growth cycle, strong adaptability and stable yield. Grafting is a common method of plant propagation, which can graft the buds or branches of one plant body to another plant body so that they can be combined into a complete plant body. Grafting can be divided into two types: asexual reproduction and sexual reproduction. It is usually divided into cut grafting (T-shaped grafting), scarf grafting (V-shaped grafting), tongue grafting (Z-shaped grafting) and belly grafting, among which belly grafting is one of the methods of plant branch grafting, which is a grafting method in which the rootstock branch is cut obliquely downward and the scion is inserted into the incision. During grafting, the branch of the rootstock is not cut off, but a slant cut is made at an appropriate position on it, and the scion with the lower part cut into a wedge shape is inserted and tied tightly. This method is often used to renew branches in the crown and supplement missing branches.

[0003] When performing belly grafting, it is usually to first bevel a knife at the appropriate position of the stock in the prior art, and then the two sides of one end to be inserted of the scion are cut respectively, and in order to better fit after grafting and improve the survival rate of grafting, the cutting thickness of the two sides is usually different, which is convenient for it to fit more closely with the stock incision. When cutting again, it is usually one hand holding the scion, and the other hand holding the blade cuts one end of the scion, and it is necessary to cut the front and back sides respectively, in the process of cutting, it is impossible to accurately control the cutting angle and the distance of cutting on both sides, which may cause the cutting to be too deep or too shallow, and all may cause one end of the scion to be cut too much or too little, so that the degree of fitting after grafting and the subsequent survival rate will be affected. And manual cutting easily scratches the hand, and safety is not high, and when facing the cutting of multiple scions, the consistency of cutting cannot be guaranteed. Summary of the invention

[0004] In view of the problem in the prior art that the cutting angle and distance cannot be accurately controlled during cutting, resulting in cutting too deep or too shallow, thus affecting the grafting effect, a grafting auxiliary device below the rhizome of sour jujube seedlings is proposed.

[0005] The purpose is to accurately and consistently control the cutting quality by controlling the cutting distance and angle, thereby ensuring the grafting effect.

[0006] The technical solution of the present invention is a grafting auxiliary device below the root of a sour jujube seedling, comprising two symmetrically arranged brackets and a cutting knife arranged in the middle of the brackets, characterized in that: it also includes a scion forming unit arranged on the brackets;

[0007] The scion forming unit comprises moving parts respectively arranged on two brackets, and an adjusting part arranged on the moving parts;

[0008] The movable part is used to adjust the position of the cutting blade on the bracket to adjust the length of the cut surface after the scion is cut, and the adjusting part is used to adjust the size of the cut surface angle when the blade is cutting;

[0009] The movable component comprises a movable component symmetrically arranged on both sides of the blade, and a clamping component arranged on the movable component; the movable component comprises a movable hole opened on the support rods on both sides of the bracket, a circular movable groove opened in the middle of the movable hole, a tensioning spring arranged in the movable groove, a movable block arranged at one end of the tensioning spring, a rotating rod penetrating the middle of the movable block, a knob arranged on one side of the rotating rod, and a limiting rod arranged on the other side of the rotating rod and penetrating the middle of one side of the cutting knife, and the other end of the limiting rod is fixedly connected to one end of another symmetrically arranged rotating rod, and the adjusting component is arranged at the top of the movable block, and the clamping component is arranged at the bottom of the rotating rod close to the cutting knife side;

[0010] The clamping assembly comprises a clamping groove which is linearly arranged on the upper surface of the moving hole wall inside the support rod, a clamping block arranged in the clamping groove, and the top of the clamping block is fixedly connected to the bottom of the rotating rod.

[0011] Furthermore, the movable hole is opened on the support rod in a three-sided penetrating shape, and is used to limit the movement of the movable component.

[0012] Furthermore, the clamping block is inclined in the direction of the tensioning spring, and the biased shape of the clamping groove is the same as that of the clamping block, which is used to abut and limit the cutting knife when beveling the scion section, and the other side of the clamping groove is longer, which is sufficient to allow the clamping block to rotate in the opposite direction in the clamping groove to perform limit unlocking.

[0013] Furthermore, the adjusting component includes a supporting plate arranged at the top of the moving block and limitedly sliding in the moving hole, an adjusting plate arranged at the bottom of one side of the supporting plate, and a torsion spring arranged between the adjusting plate and the supporting plate for applying a downward torsional extrusion force to the adjusting plate, a toggle portion arranged on one side of the two adjusting plates, a locking block arranged on one side of the cutting knife, an abutting block arranged on one side of the top of the locking block, locking grooves evenly arranged on the side of the adjusting plate facing the locking block, and an abutting groove arranged at the top of the locking groove for abutting and limiting the abutting block, and the locking block abuts in the locking groove.

[0014] Furthermore, the adjustment plate is in an arc shape that is concave and biased toward one side of the tension spring, the locking block is in an arc shape that is convex and biased toward one side of the tension spring, and the shape and bias of the locking groove are the same as those of the locking block.

[0015] Furthermore, the maximum distance at the opening of the locking groove is sufficient to allow the locking block to move in and out.

[0016] Furthermore, the positions of the two cutting knives on the bracket are different, and a plurality of insertion holes are provided in a linear array on the bracket, and the insertion holes only penetrate one side of the bracket.

[0017] Furthermore, a lifting assembly is provided between the two brackets, and the lifting assembly includes four lifting grooves opened on opposite sides of one of the brackets, corresponding return springs arranged in the lifting grooves, and the two ends of the return springs are respectively fixedly connected to the lifting grooves and the other bracket, and lifting blocks are symmetrically arranged on both sides of the middle part of one of the brackets, and the lifting blocks are arc-shaped and the top thereof abuts against the bottom of the top bracket.

[0018] Another object of the present invention is to provide a method for grafting wild jujube seedlings below the rhizome, the purpose of which is to reduce the generation of root tillers by lowering the grafting position to the root, save the labor of removing the root tillers after grafting, and improve the grafting efficiency.

[0019] To achieve the above object, the present invention provides the following technical solution: a method for grafting jujube seedlings below the rhizome, comprising the following steps: first, selecting jujube seedlings with a base diameter of more than 0.5 cm, starting grafting around March 25 in a suitable climate zone, and ending grafting half a month later, and selecting to graft below the rhizome;

[0020] Before grafting, cut off the sour jujube seedlings at about 5 cm from the base and remove the upper branches;

[0021] Then use tools to loosen the soil at the root of the seedling, take it out, expose about 2cm of the underground roots, and graft 1-2cm below the underground roots;

[0022] When handling the grafted scion, turn the two lifting blocks by hand to expand the two brackets, put the scion to be grafted into the insertion hole between the two brackets, release the push on the lifting blocks, merge the two brackets, adjust the moving parts and the adjusting parts to the appropriate positions, pull the scion so that the bottom of both sides of the scion are cut into bevels.

[0023] Furthermore, during grafting, the root side of the seedling to be grafted is first beveled, the cut scion is inserted into the beveled part of the root of the seedling to be grafted, and the grafted part and the end of the scion are wrapped with a grafting film.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. During grafting, the cutting knives on both sides are moved and adjusted to a suitable cutting distance by means of a moving component, and then the cutting angles of the two cutting knives are adjusted by means of an adjusting component, so that the scion and the rootstock are closely fitted during grafting, thereby improving the survival rate of the grafting.

[0026] 2. Different locking grooves are adapted to different cutting angles. Different cutting angle settings make it adaptable in a wider range. There is no need to hold the blade in hand to cut the two sides of the scion separately. While improving the cutting efficiency, it avoids accidentally scratching the hand during cutting and enhances the safety during grafting.

[0027] 3. Before inserting the scion, push the two lifting blocks upward and turn them by hand. One side of the lifting block lifts the bracket, and the bracket stretches the reset spring. This can adapt to the cutting requirements of scions of different thicknesses and improve the cutting adaptability of the device. The reset spring can make the cutting knives on both sides tightly against the side wall of the scion. The cutting effect can be achieved by simply pulling the scion.

[0028] 4. The conventional grafting method is to graft 3 cm above the ground. Lowering the grafting site to the root can reduce the production of root suckers and save the labor of removing root suckers after grafting. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0030] Figure 2 It is a structural schematic diagram of another angle of the whole of the present invention;

[0031] Figure 3 It is a schematic structural diagram of the overall single scion forming unit of the present invention;

[0032] Figure 4 It is a schematic diagram of the overall structure inside the scion forming unit of the present invention;

[0033] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0034] Figure 6 It is a schematic diagram of the overall structure of the clamping assembly of the present invention;

[0035] Figure 7 It is a schematic diagram of the matching structure of the adjustment plate and the locking block of the present invention;

[0036] Figure 8 It is a schematic diagram of the overall structure of the jacking assembly of the present invention.

[0037] In the figure:

[0038] 1. Bracket; 11. Cutting knife; 2. Moving assembly; 21. Moving hole; 22. Moving groove; 23. Tension spring; 24. Moving block; 25. Rotating rod; 26. Knob; 27. Limiting rod; 3. Snap assembly; 31. Snap groove; 32. Snap block; 4. Adjusting component; 41. Support plate; 42. Adjusting plate; 43. Toggle part; 44. Locking block; 45. Abutting block; 46. Locking groove; 47. Abutting groove; 5. Lifting assembly; 51. Lifting groove; 52. Reset spring; 53. Lifting block. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0040] Example 1, reference Figure 1-Figure 6 , which is the first embodiment of the present invention, provides a grafting auxiliary device for jujube seedlings below the rhizome, including two symmetrically installed brackets 1, and a cutting knife 11 movably installed between the two brackets 1, and also includes a scion forming unit installed on the bracket 1; the scion forming unit includes moving parts respectively installed on the two brackets 1, and an adjusting part 4 installed on the moving part; the moving part is used to adjust the position of the cutting knife 11 on the bracket 1 to adjust the length of the cut surface after the scion is cut, and the adjusting part 4 is used to adjust the size of the cut surface angle when the blade is cutting; the moving part includes a moving component 2 installed on both sides of the blade symmetrically arranged, and a clamping component 3 installed on the moving component 2; the moving component 2 includes a moving hole 21 opened on the support rods on both sides of the bracket 1, and a clamping component 3 opened in the middle of the moving hole 21 A circular movable groove 22, a tensioning spring 23 installed in the movable groove 22, a movable block 24 fixedly connected to one end of the tensioning spring 23, a rotating rod 25 penetrating the middle of the movable block 24, a knob 26 arranged on one side of the rotating rod 25, and a limiting rod 27 rotatably connected to the other side of the rotating rod 25 and penetrating the middle of one side of the cutting knife 11, and the other end of the limiting rod 27 is fixedly connected to one end of another symmetrically installed rotating rod 25, and the adjusting component 4 is installed on the top of the movable block 24, and the clamping assembly 3 is installed at the bottom of the rotating rod 25 close to the cutting knife 11; the clamping assembly 3 includes a clamping groove 31 on the upper surface of the hole wall of the movable hole 21 inside the support rod, a clamping block 32 abutting against the clamping groove 31, and the top of the clamping block 32 is fixedly connected to the bottom of the rotating rod 25.

[0041] Specifically, during grafting, the cutting knives 11 on both sides are moved and adjusted to a suitable cutting distance through the moving parts, and then the cutting angles of the two cutting knives 11 are adjusted through the adjusting parts 4, so as to facilitate the close fit between the scion and the rootstock during grafting and improve the survival rate of the grafting. When working, several scions are placed between the two brackets 1, and the moving parts on both sides are adjusted respectively. The knobs 26 on both sides can be pushed from the bottom with one hand to pull in the direction of the tensioning spring 23, so that the cutting knife 11 is closer to the bottom of the scion, and the knob 26 pushes the moving block 24 to move in the moving hole 21, and the moving block 24 stretches the tensioning spring 23, and the rotating rod 25 is synchronously driven by the moving block 24 to move, and the rotating rod 25 drives the limiting rod 27 and the cutting knife 11 to move together, so that the cutting knife 11 moves on the bracket 1. When it moves to a suitable position, the knob 26 is turned, and the knob 26 drives the bottom clamping block 32 to rotate, and rotates from one side of the clamping groove 31 into the clamping range of the moving clamping groove 31. When cutting the scion, the cutting knife 11 is limited by the limiting rod 27, and the limiting rod 27 is abutted by the clamping groove 31 through the rotating rod 25 and the clamping block 32 at its bottom, ensuring that the cutting knife 11 does not move during cutting, thereby improving the stability during cutting. When the position of the cutting tool 11 needs to be adjusted again, the rotating rod 25 is rotated in the opposite direction to make the clamping block 32 rotate out of the clamping groove 31. When it moves to the appropriate position, the knob 26 is turned back. Under the action of the tensioning spring 23, the clamping block 32 will automatically clamp into the clamping groove 31, thereby realizing automatic clamping and positioning of the cutting tool 11.

[0042] Reference Figure 1-Figure 4 The moving hole 21 is opened on the support rod in a three-sided penetrating shape, and is used to limit the movement of the moving component 2.

[0043] Specifically, the moving hole 21 is used to limit the moving component 2 to ensure the stability of the moving component 2 during the movement and adjustment process, and can synchronously drive the adjustment component 4 to move.

[0044] Reference Figure 5 The clamping block 32 is inclined in the direction of the tensioning spring 23, and the biased shape of the clamping groove 31 is the same as that of the clamping block 32, which is used to abut and limit the cutting knife 11 when beveling the scion section, and the other side of the clamping groove 31 is long enough to allow the clamping block 32 to rotate in the reverse direction in the clamping groove 31 to limit and unlock.

[0045] Specifically, the shapes of the snap-in block 32 and the snap-in slot 31 are designed to facilitate better snap-in connection between the snap-in block 32 and the snap-in slot 31 without affecting the rotation of the snap-in block 32 out of the snap-in slot 31, thereby improving the stability during the snap-in limit and enabling rapid unlocking of the snap-in block 32 after being snapped.

[0046] Example 2, reference Figure 1-Figure 7 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the adjusting component 4 includes a supporting plate 41 fixedly connected to the top of the moving block 24 and limitedly sliding in the moving hole 21, an adjusting plate 42 rotatably connected to the bottom of one side of the supporting plate 41, and a torsion spring (not shown in the figure) is installed in abutment between the adjusting plate 42 and the supporting plate 41 for applying a downward torsional extrusion force to the adjusting plate 42, a toggle portion 43 fixedly connected to one side of the two adjusting plates 42, a locking block 44 clamped on one side of the cutting blade 11, an abutting block 45 fixedly connected to one side of the top of the locking block 44, locking grooves 46 evenly arranged on the side of the adjusting plate 42 facing the locking block 44, and an abutting groove 47 arranged at the top of the locking groove 46 for abutting and limiting the abutting block 45, and the locking block 44 abuts in the locking groove 46.

[0047] Specifically, the adjustment component 4 is used to adjust the cutting angle of the cutting blade 11 on the scion, so that one end of the scion can be better fitted with the incision of the rootstock after cutting, thereby promoting the healthy and strong growth of the plant. Under the action of the torsion spring, the adjustment plate 42 has a torsion force that rotates in the direction of the cutting blade 11 first, so that the locking groove 46 can be engaged with the locking block 44. When adjusting, the toggle part 43 is toggled upward to make the adjustment plate 42 rotate upward with one end as the center of the circle. During the rotation process, the locking groove 46 is larger than the locking block 44, and the space inside it can make the locking groove 46 smoothly rotate away from the locking block 44. However, when the torsion spring drives the adjustment plate 42 to rotate in the direction of the cutting blade 11, it will push the locking block 44 to move synchronously, and finally make the abutment block 45 stuck in the abutment groove 47, thereby realizing the limiting effect on the other side of the cutting blade 11. When the locking block 44 is in the locking groove 46, no matter whether the locking block 44 rotates upward or downward, it will be stuck in the locking groove. The locking block 44 can be unlocked only when the adjusting plate 42 is actively rotated. That is, the design of this structure has a self-locking effect between the locking block 44 and the locking groove 46 under the action of the torsion spring, which improves the locking effect and further enhances the stability of the cutting knife 11 during the cutting process, avoids the formation of uneven cross-sections after cutting, thereby affecting the recovery and growth after grafting. Different locking grooves 46 are suitable for different cutting angles. Different cutting angle settings make it have a wider range of adaptability. There is no need to hold the blade by hand to cut the two sides of the scion respectively, which improves the cutting efficiency and avoids accidentally scratching the hands during cutting, thereby enhancing the safety during grafting.

[0048] Reference Figure 7 The adjusting plate 42 is in an arc shape that is concave and biased toward one side of the tensioning spring 23 , the locking block 44 is in an arc shape that is convex and biased toward one side of the tensioning spring 23 , and the shape and bias of the locking groove 46 are the same as those of the locking block 44 .

[0049] Specifically, such a structural design facilitates improving the automatic capture and locking effect of the adjustment plate 42 on the locking block 44 after adjustment, thereby achieving rapid snap-on locking.

[0050] Reference Figure 7 The maximum distance at the opening of the locking groove 46 is sufficient to allow the locking block 44 to move in and out.

[0051] Specifically, the locking block 44 can be unlocked only when the adjusting plate 42 is manually and actively moved, thereby improving the stability and cutting safety after locking.

[0052] Reference Figure 1-Figure 2 The positions of the two cutting knives 11 on the bracket 1 are different. A plurality of insertion holes are provided in a linear array on the bracket 1 and only penetrate one side of the bracket 1 .

[0053] Specifically, the design of different insertion holes is different from the prior art in which scions are cut sequentially. Multiple scions can be put in at the same time. One hand holds the middle of the bracket 1, and the other hand can pull the scions at the same time or sequentially, so that multiple scions can be cut at one time. Not only can the cutting surface be kept consistent, but also multiple scions can be cut quickly, improving the cutting effect, thereby further improving the grafting efficiency. The rest of the structure is the same as that of Example 1.

[0054] Example 3, reference Figure 8 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that a lifting assembly 5 is further installed between the two brackets 1, and the lifting assembly 5 includes four lifting grooves 51 opened on opposite sides of one of the brackets 1, and a return spring 52 fixedly connected to the lifting groove 51, and the two ends of the return spring 52 are respectively fixedly connected to the lifting groove 51 and the other bracket 1, and a lifting block 53 symmetrically rotated and connected to both sides of the middle part of one of the brackets 1, and the lifting block 53 is arc-shaped and its top is abutted against the bottom of the top bracket 1.

[0055] Specifically, before inserting the scion, the two lifting blocks 53 are pushed upward and turned by hand, and one side of the lifting block 53 lifts the bracket 1, and the bracket 1 stretches the reset spring 52, so as to meet the cutting requirements of scions of different thicknesses, improve the adaptability of the device cutting, and the reset spring 52 can make the cutting knives 11 on both sides tightly against the side wall of the scion, and the cutting effect can be achieved by pulling the scion. The rest of the structure is the same as that of Example 2.

[0056] In summary, the working principle of the present invention is as follows: before cutting, the knob 26 is turned to disengage the clamping block 32 from the clamping groove 31, and the knob 26 is pulled to a suitable cutting position, and the knob 26 is reversed (a torsion spring can be provided between the moving block 24 and the rotating rod 25, that is, the clamping block 32 can be automatically supported without reversing) so that the clamping block 32 can be clamped by the clamping groove 31, and then the adjusting plate 42 is disengaged from the clamping of the locking block 44 by rotating the toggle portion 43, and then the cutting knife is adjusted to a suitable cutting position. Angle, release adjustment plate 42 so that locking groove 46 locks locking block 44, realizes fixing the cutting knife, then puts scion into insertion hole, and makes cutting blade close to scion side wall by reset spring 52, after clamping, pulls scion, can realize cutting of multiple scions simultaneously or successively, improves grafting effect and grafting survival rate, and the setting of cutting knife with adjustable distance and angle on both sides makes it possible to form cut surface of different thickness on both sides of scion, is convenient to control the flow of water and reduce transpiration. If the cutting depth on both sides of scion is the same, then the water of scion will be lost quickly through cutting surface, causing scion to lose water and die. On the contrary, if the cutting depth on both sides of scion is different, then the flow of water can be controlled, so that scion can better absorb water and keep healthy. In addition, the difference of cutting thickness on both sides of scion can also help control air circulation. Shallower cutting can allow more air to enter scion, while deeper cutting can prevent too much air from entering. This can prevent microorganisms such as germs and water bugs from entering scion.

[0057] Example 4, reference Figure 1 - Figure 8 , which is the fourth embodiment of the present invention, provides: a method for grafting wild jujube seedlings below the rootstock, comprising the following steps:

[0058] S1, first, select wild jujube seedlings with a base diameter of more than 0.5 cm, start grafting around March 25 in a suitable climate zone, and end grafting half a month later, and choose to graft below the rhizome;

[0059] S2, before grafting, cut off the sour jujube seedlings at about 5 cm from the base and remove the upper branches;

[0060] S3, then use tools to loosen the soil at the root of the seedling, take it out, expose about 2cm of the underground roots, and graft at 1-2cm below the underground roots;

[0061] S4, when handling the grafted scion, manually rotate the two lifting blocks 53 to expand the two brackets 1, put the scion to be grafted into the insertion hole between the two brackets 1, release the push on the lifting block 53, merge the two brackets 1, adjust the moving part and the adjusting part 4 to the appropriate position respectively, pull the scion so that the bottom of both sides of the scion are cut into bevels.

[0062] S5, when grafting, firstly cut the side of the root of the seedling to be grafted obliquely, insert the cut scion into the oblique part of the root of the seedling to be grafted, and wrap the grafted part and the end of the scion with a grafting film.

[0063] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A grafting auxiliary device for wild jujube seedlings below the root and stem, comprising two symmetrically arranged brackets (1), and a cutting knife (11) arranged in the middle of the brackets (1), characterized in that: It also includes a scion forming unit arranged on the support (1); The scion forming unit comprises moving parts respectively arranged on two brackets (1), and an adjusting part (4) arranged on the moving parts; The movable component is used to adjust the position of the cutting blade (11) on the support (1) to adjust the length of the cut surface after the scion is cut, and the adjusting component (4) is used to adjust the size of the cut surface angle when the blade is cutting; The movable component comprises a movable component (2) symmetrically arranged on both sides of the blade, and a clamping component (3) arranged on the movable component (2); the movable component (2) comprises a movable hole (21) opened on the support rods on both sides of the bracket (1), a circular movable groove (22) opened in the middle of the movable hole (21), a tension spring (23) arranged in the movable groove (22), a movable block (24) arranged at one end of the tension spring (23), a rotating rod (25) penetrating the middle of the movable block (24), a knob (26) arranged on one side of the rotating rod (25), and a limiting rod (27) arranged on the other side of the rotating rod (25) and penetrating the middle of one side of the cutting blade (11), and the other end of the limiting rod (27) is fixedly connected to one end of another symmetrically arranged rotating rod (25), and the adjusting component (4) is arranged at the top of the movable block (24), and the clamping component (3) is arranged at the bottom of the rotating rod (25) close to the cutting blade (11); The clamping assembly (3) comprises a clamping groove (31) formed in a linear array on the upper surface of the hole wall of the moving hole (21) inside the support rod, a clamping block (32) arranged in the clamping groove (31), and the top of the clamping block (32) is fixedly connected to the bottom of the rotating rod (25).

2. The grafting auxiliary device below the root of the sour jujube seedling according to claim 1, characterized in that: The moving hole (21) is formed on the support rod in a three-sided penetrating shape and is used to limit the movement of the moving component (2).

3. The grafting auxiliary device below the root of the sour jujube seedling according to claim 2, characterized in that: The clamping block (32) is inclined in the direction of the tension spring (23), and the biased shape of the clamping groove (31) is the same as that of the clamping block (32), and is used to abut and limit the cutting knife (11) when beveling the scion section, and the other side of the clamping groove (31) is long enough to allow the clamping block (32) to rotate in the opposite direction in the clamping groove (31) to perform limit unlocking.

4. The grafting auxiliary device below the root of the sour jujube seedling according to claim 1, characterized in that: The adjusting component (4) comprises a support plate (41) arranged at the top of the moving block (24) and limitedly sliding in the moving hole (21), an adjusting plate (42) arranged at the bottom of one side of the supporting plate (41), and a torsion spring is arranged between the adjusting plate (42) and the supporting plate (41) for applying a downward twisting extrusion force to the adjusting plate (42), a toggle portion (43) arranged at one side of the two adjusting plates (42), a locking block (44) arranged at one side of the cutting blade (11), an abutting block (45) arranged at one side of the top of the locking block (44), a locking groove (46) evenly arranged at the side of the adjusting plate (42) facing the locking block (44), and an abutting groove (47) arranged at the top of the locking groove (46) for abutting and limiting the abutting block (45), and the locking block (44) abuts in the locking groove (46).

5. The auxiliary device for grafting below the root of sour jujube seedlings according to claim 4, characterized in that: The adjusting plate (42) is in an arc shape that is concave and biased toward one side of the tension spring (23), the locking block (44) is in an arc shape that is convex and biased toward one side of the tension spring (23), and the shape and bias of the locking groove (46) are the same as those of the locking block (44).

6. The grafting auxiliary device below the root of the sour jujube seedling according to claim 5, characterized in that: The maximum distance at the opening of the locking groove (46) is sufficient to allow the locking block (44) to move in and out.

7. The auxiliary device for grafting below the root of sour jujube seedlings according to claim 1, characterized in that: The two cutting knives (11) are located at different positions on the bracket (1), and a plurality of insertion holes are provided in a linear array on the bracket (1), and the insertion holes only penetrate one side of the bracket (1).

8. The auxiliary device for grafting below the rootstock of sour jujube seedlings according to claim 7, characterized in that: A lifting assembly (5) is also arranged between the two brackets (1), and the lifting assembly (5) comprises four lifting grooves (51) opened on opposite sides of one of the brackets (1), a return spring (52) correspondingly arranged in the lifting groove (51), and the two ends of the return spring (52) are respectively fixedly connected to the lifting groove (51) and the other bracket (1), and a lifting block (53) symmetrically arranged on both sides of the middle part of one of the brackets (1), and the lifting block (53) is arc-shaped and its top is in contact with the bottom of the top bracket (1).

9. A method for grafting jujube seedlings below the rhizome, applied to the jujube seedlings below the rhizome grafting auxiliary device as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: First, select wild jujube seedlings with a base diameter of more than 0.5 cm. In a suitable climate zone, start grafting around March 25 and finish grafting half a month later. Grafting should be done below the rhizome. Before grafting, cut off the sour jujube seedlings at about 5 cm from the base and remove the upper branches; Then use tools to loosen the soil at the root of the seedling, take it out, expose about 2cm of the underground roots, and graft 1-2cm below the underground roots; When handling the grafted scion, the two lifting blocks (53) are manually rotated to expand the two brackets (1), the scion to be grafted is placed into the insertion hole between the two brackets (1), the pushing of the lifting blocks (53) is released, the two brackets (1) are merged, the moving parts and the adjusting parts (4) are respectively adjusted to the appropriate positions, and the scion is pulled so that the bottoms of both sides of the scion are cut into inclined surfaces.

10. The method for grafting wild jujube seedlings below the rootstock according to claim 9, characterized in that: During grafting, the root side of the seedling to be grafted is first cut obliquely, the cut scion is inserted into the oblique part of the root of the seedling to be grafted, and the grafted part and the end of the scion are wrapped with a grafting film.

Images