A breeding method suitable for hardwood cutting of southern highbush blueberry

Abstract

The present application belongs to the technical field of south highbush blueberry cutting equipment, especially a breeding method suitable for south highbush blueberry hardwood cutting, comprising the following steps: step one, selection of blueberry branches; step two, selection of the time for cutting blueberry branches, preferably in February; step three, cutting of blueberry branches, the cutting of blueberry branches is operated by a special tool, the special tool is used to control the surface of the blueberry branch and placed in the placing groove of the special tool, and the flat cutting and oblique cutting are controlled and operated simultaneously by one-key operation; and step four, selection of the matrix of blueberry branches and laying of the matrix layer. The breeding method suitable for south highbush blueberry hardwood cutting sets the blueberry hardwood cutting breeding method, achieves a high rooting rate of hardwood cuttings, can realize large-area blueberry cultivation and planting, greatly improves the survival rate of branches before cutting by using an arched shed, improves the cultivation effect of blueberries, and significantly improves the seedling raising efficiency.

Description

Technical Field

[0001] This invention relates to the field of hardwood cutting propagation technology for Southern Highbush Blueberries, and more particularly to a propagation method suitable for hardwood cutting propagation of Southern Highbush Blueberries. Background Technology

[0002] Blueberries, also known as blueberries, are perennial low shrubs belonging to the genus Vaccinium in the family Ericaceae. They grow at altitudes of 900-2300 meters. Blueberries are rich in nutrients, especially anthocyanins, which not only have excellent nutritional and health benefits but also help prevent brain aging, strengthen the heart, fight cancer, soften blood vessels, and enhance the immune system. Due to their high health value, they are popular worldwide and are one of the five healthiest fruits recommended by the Food and Agriculture Organization of the United Nations.

[0003] Before large-scale planting of blueberries, seedlings need to be cultivated. Currently, seedlings are generally cultivated through tissue culture or cuttings. Cuttings are mainly used for highbush blueberries. Because different varieties of blueberries have different rooting difficulties, improving the rooting rate of cuttings is a technical issue in cutting propagation. In addition, existing blueberry branches are cut on the tree using scissors, which can easily cause uneven cuts or even damage and breakage of the cut ends, affecting the quality of cultivation. Therefore, a propagation method suitable for hardwood cuttings of southern highbush blueberries is needed. Summary of the Invention

[0004] Based on existing technical problems, this invention proposes a propagation method suitable for hardwood cuttings of southern highbush blueberries.

[0005] The present invention proposes a method for propagating southern highbush blueberries by hardwood cuttings, comprising the following steps: Step 1, selection of blueberry branches;

[0006] Step two, the best time to cut blueberry branches is in February;

[0007] Step 3: Cutting blueberry branches. When cutting blueberry branches, a special tool is used. Take the special tool and place the surface of the blueberry branch inside the placement slot of the special tool. The flat cut and the angled cut can be controlled by one button.

[0008] Step 4: Select the substrate for the blueberry branches and lay the substrate layer;

[0009] Step 5: Carefully select and insert the stored blueberry cuttings into the prepared substrate layer for cultivation;

[0010] Step six, post-cutting management;

[0011] Step 7: Transplant after culture is complete.

[0012] Preferably, in step one, it is appropriate to select branches with high hardness, good maturity and health, one-year-old nutrient branches, and select the middle and lower part of the branches as cuttings.

[0013] Preferably, in step three, the blueberry cuttings are cut to a length of 8-10cm, obtained in one operation using a special tool. The upper cut is flat, and the lower cut is oblique at an angle of 30 degrees. The cuts are smooth, and the lower cut is located directly below the bud. After cutting, the cuttings are temporarily buried in sawdust, moss, or river sand, with the temperature controlled at 3-7°C and the humidity at 52%-58%.

[0014] Preferably, the special tool includes a gripping tube, one end of which is fixedly connected to a first shearing block, and both ends of the first shearing block are hinged to second shearing blocks. Placement grooves are formed on the surfaces of the two second shearing blocks and the surface of the first shearing block. The inner walls of the multiple placement grooves are slidably inserted into the surface of the blueberry insert. A first power chamber is formed inside the first shearing block, and a second power chamber is formed inside the two second shearing blocks. The inner wall of the first power chamber is fixedly connected to the inner wall of the gripping tube. The relative inner walls of the two second power chambers are fixedly connected to the inner top and bottom walls of the first power chamber via flexible hoses. Hydraulic oil is provided inside the first power chamber, the two second power chambers, and the gripping tube. A connecting plate is fixedly connected to the inner wall of one end of the gripping tube, and a drive motor is fixedly connected to the surface of the connecting plate. The output shaft of the drive motor is fixedly connected to a power shaft via a coupling. A compression tube is threaded to one end of the power shaft, and a compression piston is fixedly connected to one end of the compression tube. A first sealing ring is fixedly connected to the surface of the compression piston, and the surface of the first sealing ring is slidably inserted into the inner wall of the gripping tube.

[0015] Positioning rods are slidably inserted into the inner walls of the first power chamber and the two second power chambers. Blades are slidably inserted into the inner walls of the two second power chambers. One end of each of the two blades and one end of each of the three positioning rods penetrates and extends into the placement groove. A rubber pad is fixedly connected to one end of each of the three positioning rods, and a second sealing ring is fixedly connected to the other end of each of the three positioning rods. The surfaces of the two second sealing rings are slidably inserted into the inner walls of the second power chambers, and the surface of one second sealing ring is slidably inserted into the inner wall of the first power chamber. A first spring is fixedly connected to the surface of each of the three positioning rods. One end of each of the multiple first springs is fixedly connected to the inner walls of the first and second power chambers, respectively. A moving piston is fixedly connected to one end of each of the two blades. A third sealing ring is fixedly connected to the surface of the moving piston. The surface of the third sealing ring is slidably inserted into the inner wall of the second power chamber. A second spring is fixedly connected to one end of the moving piston. One end of the second spring is fixedly connected to the inner wall of the second power chamber. One of the blades is arranged at an angle and forms an angle with the surface of the other blade. The elastic force of the second spring is greater than that of the first spring.

[0016] Preferably, the upper and lower surfaces of the first shearing block are both fixedly connected with steel wire ropes via clips. One end of each steel wire rope passes through and extends to the surface of the second shearing block. An adjusting rod is fixedly connected to the opposing ends of each steel wire rope. A nut is threaded onto the surface of the adjusting rod, and the surface of the nut is located on one side of the second shearing block. Compression springs are fixedly connected to the upper and lower surfaces of the first shearing block. One end of each compression spring is fixedly connected to the bottom of the two second shearing blocks. During the shearing operation, the manual handle is used to pick up the gripper tube, control the placement slot and blueberry insert to be placed inside, and click the control button to control the drive motor to rotate forward, driving the power shaft to work and driving the extrusion tube to move forward, thereby driving the extrusion... The piston compresses the internal hydraulic oil to generate oil pressure, which simultaneously controls the oil pressure to compress the positioning rod and the moving piston. When the oil pressure is greater than the first spring but less than the second spring, it drives the positioning rod to move outward, controlling the rubber pad to compress the surface of the blueberry cutting to fix it in place. The compression piston continues to work, compressing the internal hydraulic oil and controlling the oil pressure to continue to increase. When the oil pressure is greater than the second spring, it controls the internal blade to move outward to cut the blueberry cutting, making the top end flat and the bottom end beveled, resulting in a smooth and even cut. When the selected blueberry cutting has a bend, the adjustment rod is pulled by rotating the nut to compress one end of the second shearing block. Under the condition of hinge, the angle of the second shearing block is controlled to achieve the auxiliary curvature clamping and cutting of the blueberry cutting.

[0017] Preferably, the substrate selection in step four includes river sand, sawdust, peat moss, and decaying moss. The selected substrate is a mixed substrate with a volume ratio of decaying moss to river sand of 1:1. A wooden bed is selected for the bed frame, with a hardboard with a sieve mesh of 0.3-0.5cm nailed to the bottom. The wooden box is placed on a round wooden frame off the ground.

[0018] Preferably, after everything is ready in step five, the substrate is thoroughly watered to ensure humidity but not waterlogging, and then the cuttings are inserted vertically into the substrate, with only one apical bud exposed, and the distance between each cutting is 5cm × 5cm.

[0019] Preferably, after the cuttings are inserted in step six, frequent watering is required to maintain soil moisture. An arched shed should be set up on the cutting bed or cutting box. The plastic of the arched shed is a transparent film. Temperature control is required when setting up the arched shed. When the temperature inside the shed is too high in May and June, shading should be provided and ventilation should be provided in time to cool down. The most critical period for water management is from the beginning of May to the end of June. At this time, the leaves have unfolded, but the cuttings have not yet rooted. Insufficient water can easily cause the cuttings to die. When the top leaves begin to turn green, it indicates that the cuttings have begun to root.

[0020] Preferably, in step six, nitrogen fertilizer is applied after the cuttings have rooted. The fertilizer should be diluted with water to make it liquid before application, with a concentration of 3%. Fertilizer is applied once a week, and water is applied after each application to wash off the fertilizer on the leaves to prevent leaf burn.

[0021] Preferably, the rooted seedlings in step seven overwinter in the seedbed or are transplanted in September. If the rooted seedlings overwinter in the seedbed, soil should be piled up on both sides of the seedbed before winter. During the rooting and seedling cultivation period, ventilation and removal of diseased plants are the main methods to control diseases.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. By setting up a blueberry branch hardwood cutting propagation method, a high rooting rate of hardwood cuttings is achieved, enabling large-scale blueberry cultivation and planting. At the same time, the use of arched greenhouses can greatly improve the survival rate of branch cuttings in the early stage, improve the blueberry cultivation effect, and significantly improve seedling efficiency.

[0024] 2. By setting up a special tool for cutting, automated cutting is achieved. One-button operation simultaneously controls the top flat cut and the bottom bevel cut, resulting in a smooth and even cut. This avoids the unevenness or damage to the cut end caused by existing scissors, thereby enhancing the seedling cultivation effect.

[0025] 3. By setting an adjusting rod, compression spring, and nut, when it is necessary to cut blueberry branches with an arc, turning the nut pulls the steel wire rope, thereby squeezing the compression spring and controlling the angle change of the cutting block surface, thus enhancing the practical effect. It is multifunctional and practical, avoiding the limitation of only being able to cut vertical blueberry branches and not being able to operate on curved blueberry branches. Attached Figure Description

[0026] Figure 1 A three-dimensional structural diagram of a propagation method for hardwood cuttings of southern highbush blueberries;

[0027] Figure 2 A front view of the tube-holding structure for a propagation method of Southern Highbush Blueberry using hardwood cuttings;

[0028] Figure 3 This invention relates to a method for propagating southern highbush blueberries using hardwood cuttings. Figure 2 Enlarged view of the structure at point A in the middle;

[0029] Figure 4 This invention relates to a method for propagating southern highbush blueberries using hardwood cuttings. Figure 2 Enlarged view of the structure at point B in the middle;

[0030] Figure 5 This invention relates to a method for propagating southern highbush blueberries using hardwood cuttings. Figure 2 Enlarged view of the structure at point C.

[0031] In the diagram: 1. Pipe gripper; 2. First shearing block; 3. Second shearing block; 4. Placement groove; 5. First power chamber; 6. Second power chamber; 7. Connecting plate; 8. Drive motor; 9. Power shaft; 10. Extrusion pipe; 11. Extrusion piston; 12. First sealing ring; 13. Positioning rod; 14. Blade; 15. Rubber pad; 16. Second sealing ring; 17. First spring; 18. Moving piston; 19. Third sealing ring; 20. Second spring; 21. Steel wire rope; 22. Adjusting rod; 23. Nut; 24. Compression spring. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Reference Figures 1-5 A method for propagating Southern Highbush Blueberry by hardwood cuttings includes the following steps: Step 1, selection of blueberry branches; in Step 1, it is appropriate to select branches with high hardness, good maturity and health, one-year-old vegetative branches, and select the middle and lower part of the branches as cuttings.

[0034] Step two: The best time to cut blueberry cuttings is in February. Step three: The blueberry cuttings should be 8-10cm long and cut in one go using a special tool. The upper cut should be horizontal, and the lower cut should be angled at a 30-degree angle. The cuts should be smooth, with the lower cut positioned directly below a bud. After cutting, temporarily bury them in sawdust, moss, or river sand, maintaining a temperature of 3-7°C and a humidity of 52%-58%.

[0035] Step 3: Cutting blueberry branches. When cutting blueberry branches, a special tool is used. Take the special tool and place the surface of the blueberry branch inside the placement slot of the special tool. The flat cut and the angled cut can be controlled by one button.

[0036] The specialized tool includes a gripper tube 1, with a first shearing block 2 fixedly connected to one end of the gripper tube 1. Second shearing blocks 3 are hinged to both ends of the first shearing block 2. Placement grooves 4 are formed on the surfaces of both second shearing blocks 3 and the first shearing block 2. The inner walls of the multiple placement grooves 4 are slidably inserted into the surface of the blueberry insert. A first power chamber 5 is formed inside the first shearing block 2, and second power chambers 6 are formed inside the two second shearing blocks 3. The inner wall of the first power chamber 5 is fixedly connected to the inner wall of the gripper tube 1. The opposing inner walls of the two second power chambers 6 are connected to the first power chamber 5 via flexible hoses. The inner top wall and the inner bottom wall are fixedly connected. Hydraulic oil is provided inside the first power chamber 5, the two second power chambers 6, and the gripping tube 1. A connecting plate 7 is fixedly connected to the inner wall of one end of the gripping tube 1. A drive motor 8 is fixedly connected to the surface of the connecting plate 7. The output shaft of the drive motor 8 is fixedly connected to the power shaft 9 through a coupling. A compression tube 10 is threaded to one end of the power shaft 9. A compression piston 11 is fixedly connected to one end of the compression tube 10. A first sealing ring 12 is fixedly connected to the surface of the compression piston 11. The surface of the first sealing ring 12 is slidably inserted into the inner wall of the gripping tube 1.

[0037] Positioning rods 13 are slidably inserted into the inner walls of the first power chamber 5 and the two second power chambers 6. Blades 14 are slidably inserted into the inner walls of the two second power chambers 6. One end of each of the two blades 14 and one end of each of the three positioning rods 13 penetrates and extends into the placement groove 4. A rubber pad 15 is fixedly connected to one end of each of the three positioning rods 13, and a second sealing ring 16 is fixedly connected to the other end of each of the three positioning rods 13. The surfaces of two second sealing rings 16 are slidably inserted into the inner walls of the second power chambers 6, and the surface of one second sealing ring 16 is slidably inserted into the inner wall of the first power chamber 5. A first spring 17 is fixedly connected to the surface of each of the three positioning rods 13. One end of each of the multiple first springs 17 is fixedly connected to the inner wall of the first power chamber 5 and the inner wall of the second power chamber 6, respectively. Each blade 14 has a fixed connection to a moving piston 18 at one end. A third sealing ring 19 is fixedly connected to the surface of the moving piston 18. The surface of the third sealing ring 19 is slidably inserted into the inner wall of the second power chamber 6. A second spring 20 is fixedly connected to one end of the moving piston 18. One end of the second spring 20 is fixedly connected to the inner wall of the second power chamber 6. One blade 14 is arranged at an angle and forms a 30-degree angle with the surface of the other blade 14. The elastic force of the second spring 20 is greater than that of the first spring 17. By setting a special tool for cutting, automated cutting is achieved. The top flat cut and bottom oblique cut are controlled simultaneously by one-button operation, resulting in a smooth and even cut. This avoids the unevenness or even damage to the cut end caused by existing scissors, thereby enhancing the seedling cultivation effect.

[0038] The upper and lower surfaces of the first shearing block 2 are both fixedly connected with steel wire ropes 21 by clips. One end of each steel wire rope 21 passes through and extends to the surface of the second shearing block 3. The opposing ends of the two steel wire ropes 21 are fixedly connected with adjusting rods 22. Nuts 23 are threadedly connected to the surface of the adjusting rods 22. The surface of the nuts 23 is located on one side of the second shearing block 3. Compression springs 24 are fixedly connected to the upper and lower surfaces of the first shearing block 2. One end of each compression spring 24 is fixedly connected to the bottom of the two second shearing blocks 3. During the shearing operation, the gripping tube 1 is manually picked up, and the placement slot 4 and blueberry insert are placed inside. The control button is pressed to control the drive motor 8 to rotate forward, which drives the power shaft 9 to work and drives the extrusion tube 10 to move forward. This drives the extrusion piston 11 to extrude the internal hydraulic oil and generate oil pressure. At the same time, the oil pressure is controlled to extrude the positioning rod 13 and the moving piston 18. When the oil pressure is greater than the first spring 17 and less than the second spring 20, the positioning rod 13 is driven to move outward. The system controls the rubber pad 15 to press the surface of the blueberry cutting to fix it in place. The piston 11 continues to work, pressing the internal hydraulic oil to continuously increase the oil pressure. When the oil pressure is greater than that of the second spring 20, the internal blade 14 is controlled to move outward to cut the blueberry cutting, making the top end flat and the bottom end obliquely cut, resulting in a smooth cut. When the selected blueberry branch is curved, the nut 23 is turned to drive the adjusting rod 22 to pull the steel wire rope 21 to press one end of the second cutting block 3. Under the condition of hinge, the angle surface of the second cutting block 3 is controlled to assist in the clamping and cutting of the curved blueberry branch. By setting the adjusting rod 22, the compression spring 24 and the nut 23, when the blueberry branch needs to be cut with a curve, the nut 23 is turned to pull the steel wire rope 21, thereby pressing the compression spring 24 and controlling the angle change of the surface of the cutting block, thus enhancing the practical effect. It is multifunctional and practical, avoiding the effect of only being able to cut vertical blueberry branches and not being able to operate curved blueberry branches.

[0039] Step 4: Select the substrate for the blueberry branches and lay the substrate layer. The substrate selection in Step 4 includes river sand, sawdust, peat moss, and humus. The selected substrate is a mixture of humus and river sand in a 1:1 volume ratio. A wooden frame is used for the frame, with a hardboard with 0.3-0.5cm mesh nailed to the bottom. The wooden box is placed on a round wooden frame off the ground.

[0040] Step 5: Select and store blueberry cuttings and insert them into the prepared substrate layer for cultivation. After everything is ready in Step 5, water the substrate thoroughly to ensure humidity but not waterlogging. Then, insert the cuttings vertically into the substrate, leaving only one apical bud exposed. The distance between each cutting is 5cm × 5cm.

[0041] Step Six: Post-Cutting Management; After cutting in Step Six, frequent watering is necessary to maintain soil moisture. A greenhouse should be set up over the cutting bed or box. The greenhouse should be made of transparent plastic film. Temperature control is required when setting up the greenhouse. If the temperature inside is too high in May and June, shading and ventilation should be provided to lower the temperature. The most critical period for water management is from early May to late June. At this time, the leaves have unfolded, but the cuttings have not yet rooted. Insufficient water can easily cause the cuttings to die. When the top leaves begin to turn green, it indicates that the cuttings have begun to root. After the cuttings have rooted in Step Six, nitrogen fertilizer should be applied. The fertilizer should be diluted with water to become a liquid and applied at a concentration of 3%. Fertilize once a week, and water after each fertilization to wash off the fertilizer on the leaves to prevent leaf burn.

[0042] Step 7: Transplant after cultivation; the seedlings that have rooted in Step 7 can overwinter in the seedbed or be transplanted in September. If the rooted seedlings overwinter in the seedbed, soil should be piled up on both sides of the seedbed before winter. During the rooting and seedling cultivation period, ventilation and removal of diseased plants are the main methods to control diseases.

[0043] By establishing a blueberry hardwood cutting propagation method, a high rooting rate of hardwood cuttings was achieved, enabling large-scale blueberry cultivation and planting. At the same time, the use of arched greenhouses can greatly improve the survival rate of cuttings in the early stage, improve the cultivation effect of blueberries, and significantly improve seedling efficiency.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for propagating southern highbush blueberries by hardwood cuttings, characterized in that, Includes the following steps: Step 1: Selection of blueberry branches; Step two: Select February as the time to cut blueberry branches; Step 3: Cutting blueberry branches. When cutting blueberry branches, a special tool is used. Take the special tool and place the surface of the blueberry branch inside the placement slot of the special tool. The flat cut and the angled cut can be controlled by one button. The special tool includes a gripping tube (1), one end of which is fixedly connected to a first shearing block (2). Both ends of the first shearing block (2) are hinged to second shearing blocks (3). Placement grooves (4) are formed on the surfaces of the two second shearing blocks (3) and the surface of the first shearing block (2). The inner walls of the multiple placement grooves (4) are slidably inserted into the surface of the blueberry insert. A first power chamber (5) is formed inside the first shearing block (2), and a second power chamber (6) is formed inside the two second shearing blocks (3). The inner wall of the first power chamber (5) is fixedly connected to the inner wall of the gripping tube (1). The relative inner walls of the two second power chambers (6) are connected to the first power chamber (5) through flexible hoses. The inner top wall and inner bottom wall are fixedly connected. Hydraulic oil is provided inside the first power chamber (5), the two second power chambers (6) and the gripping tube (1). A connecting plate (7) is fixedly connected to the inner wall of one end of the gripping tube (1). A drive motor (8) is fixedly connected to the surface of the connecting plate (7). The output shaft of the drive motor (8) is fixedly connected to the power shaft (9) through a coupling. A pressing tube (10) is threaded to one end of the power shaft (9). A pressing piston (11) is fixedly connected to one end of the pressing tube (10). A first sealing ring (12) is fixedly connected to the surface of the pressing piston (11). The surface of the first sealing ring (12) is slidably inserted into the inner wall of the gripping tube (1). Positioning rods (13) are slidably inserted into the inner walls of the first power chamber (5) and the two second power chambers (6). Blades (14) are slidably inserted into the inner walls of the two second power chambers (6). One end of each of the two blades (14) and one end of each of the three positioning rods (13) penetrate and extend into the interior of the placement groove (4). One end of each of the three positioning rods (13) is fixedly connected to a rubber pad (15). The other end of each of the three positioning rods (13) is fixedly connected to a second sealing ring (16). The surfaces of the two second sealing rings (16) are slidably inserted into the inner walls of the second power chambers (6), and the surface of one second sealing ring (16) is slidably inserted into the inner wall of the first power chamber (5). The surfaces of each of the three positioning rods (13) are fixedly connected to a first spring. Spring (17), one end of multiple first springs (17) is fixedly connected to the inner wall of the first power chamber (5) and the inner wall of the second power chamber (6) respectively. One end of each of the two blades (14) is fixedly connected to a moving piston (18). A third sealing ring (19) is fixedly connected to the surface of the moving piston (18). The surface of the third sealing ring (19) is slidably inserted into the inner wall of the second power chamber (6). One end of the moving piston (18) is fixedly connected to a second spring (20). One end of the second spring (20) is fixedly connected to the inner wall of the second power chamber (6). One of the blades (14) is arranged at an angle and forms a 30-degree angle with the surface of the other blade (14). The elastic force of the second spring (20) is greater than that of the first spring (17). The upper and lower surfaces of the first shearing block (2) are fixedly connected with steel wire ropes (21) by buckles. One end of each of the two steel wire ropes (21) passes through and extends to the surface of the second shearing block (3). The opposing ends of the two steel wire ropes (21) are fixedly connected with adjusting rods (22). Nuts (23) are threaded onto the surface of the adjusting rods (22). The surface of the nuts (23) is located on one side of the second shearing block (3). Compression springs (24) are fixedly connected to the upper and lower surfaces of the first shearing block (2). One end of each of the two compression springs (24) is fixedly connected to the bottom of the two second shearing blocks (3). During the shearing operation, the manual grabbing tube (1) is picked up, and the placement slot (4) and blueberry insert are placed inside. The control button is clicked to control the drive motor (8) to rotate forward, which drives the power shaft (9) to work and drives the extrusion tube (10) to move forward, thereby driving the extrusion tube (10) to move forward. The squeeze piston (11) squeezes the internal hydraulic oil to generate oil pressure, and at the same time controls the oil pressure to squeeze the positioning rod (13) and the moving piston (18). When the oil pressure is greater than the first spring (17) and less than the second spring (20), the positioning rod (13) is driven to move outward, and the rubber pad (15) is controlled to squeeze the surface of the blueberry insert to fix it in position. The squeeze piston (11) continues to work to squeeze the internal hydraulic oil, and controls the oil pressure to continue to increase. When the oil pressure is greater than the second spring (20), the internal blade (14) is controlled to move outward to cut the blueberry insert, so that the top end is cut flat and the bottom end is cut obliquely, and the cut is flat and smooth. When the selected blueberry branch has a bend, the adjusting rod (22) is driven by rotating the nut (23) to pull the steel wire rope (21) to squeeze one end of the second shearing block (3). Under the condition of hinge, the second shearing block (3) is controlled to achieve the angle surface to assist the blueberry branch arc clamping and cutting. Step 4: Select the substrate for the blueberry branches and lay the substrate layer; Step 5: Carefully select and insert the stored blueberry cuttings into the prepared substrate layer for cultivation; Step six, post-cutting management; Step 7: Transplant after culture is complete.

2. The method for propagating southern highbush blueberries by hardwood cuttings according to claim 1, characterized in that: In step one, it is advisable to select branches with high hardness, good maturity, and good health, as well as one-year-old nutrient branches, and to select the middle and lower parts of the branches as cuttings.

3. The method for propagating southern highbush blueberries by hardwood cuttings according to claim 1, characterized in that: In step three, the blueberry cuttings are cut to a length of 8-10cm, obtained in one operation using a special tool. The upper cut is flat, and the lower cut is oblique at an angle of 30 degrees. The cuts are smooth, and the lower cut is located directly under the bud. After cutting, they are temporarily buried in sawdust, moss, or river sand, with the temperature controlled at 3-7°C and the humidity at 52%-58%.

4. The method for propagating southern highbush blueberries by hardwood cuttings according to claim 1, characterized in that: In step four, the substrate is a mixture of sphagnum moss and river sand in a 1:1 volume ratio. A wooden frame bed is used, with a hardboard with a 0.3-0.5cm mesh nailed to the bottom of the frame bed. The wooden box is lifted off the ground by a round wooden frame.

5. The method for propagating southern highbush blueberries by hardwood cuttings according to claim 1, characterized in that: After everything is ready in step five, thoroughly water the substrate to ensure humidity but not waterlogging. Then, insert the cuttings vertically into the substrate, leaving only one apical bud exposed. The distance between each cutting is 5cm × 5cm.

6. The method for propagating southern highbush blueberries by hardwood cuttings according to claim 1, characterized in that: After the cuttings are inserted in step six, they need to be watered frequently to maintain soil moisture. A greenhouse should be set up on the cutting bed or cutting box. The greenhouse should be made of transparent plastic film. Temperature control is required when setting up the greenhouse. When the temperature inside the greenhouse is too high in May and June, shading should be provided and ventilation should be provided in time to cool down. The most critical period for water management is from the beginning of May to the end of June. At this time, the leaves have unfolded, but the cuttings have not yet rooted. Insufficient water can easily cause the cuttings to die. When the top leaves start to turn green, it means that the cuttings have begun to root.

7. The method for propagating southern highbush blueberries by hardwood cuttings according to claim 1, characterized in that: After the cuttings have rooted in step six, nitrogen fertilizer should be applied. The fertilizer should be diluted with water to make it liquid before application, with a concentration of 3%. Fertilize once a week, and water after each application to wash off the fertilizer on the leaves to prevent leaf burn.

8. The method for propagating southern highbush blueberries by hardwood cuttings according to claim 1, characterized in that: In step seven, the rooted seedlings overwinter in the seedbed or are transplanted in September. If the rooted seedlings overwinter in the seedbed, soil should be piled up on both sides of the seedbed before winter. During the rooting and seedling cultivation period, ventilation and removal of diseased plants are the main methods to control diseases.

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