Bridging method for remedying bad branches of carya illinoensis

Abstract

The invention relates to the technical field of carya illinoensis, and particularly discloses a bridging method for remedying damaged branches of carya illinoensis. A bridging method for remedying bad branches of carya illinoensis comprises the following steps: S1, cutting: cutting a main stem above a damaged part, and forming a bridging groove in the main stem; s2, branches are selected, wherein branches regenerated at the roots of the damaged plant rhizomes are cut to serve as grafting branches; s3, bridging: inserting the cut end of the grafted branch into the bridging groove, and wrapping with a film to complete bridging. The remediation method has the advantages of being easy to operate, capable of saving cost, obvious in remediation effect and the like.

Description

Technical Field

[0001] The present application relates to the technical field of thin-shell pecans, and more particularly to a bridging method for remedying bad branches of thin-shell pecans. Background Art

[0002] Thin-shelled pecan seedlings are more likely to suffer damage to the stems at the base of the seedlings due to wind damage, mechanical operation damage and stem-boring pests during their growth, which makes the growth progress of the thin-shelled pecan seedlings unable to be the same as that of thin-shelled pecan seedlings of the same period. In addition, since the growth cycle of thin-shelled pecan seedlings is long and their growth is slow, the economic and time costs of digging and replanting are high. Therefore, it is necessary to provide a method for remedying the thin-shelled pecan seedlings with damaged branches. Summary of the invention

[0003] In order to remedy the bad branches of thin-shelled pecan seedlings, the present application provides a bridging method for remedy the bad branches of thin-shelled pecans, using the following technical solution:

[0004] The present application provides a bridging method for remedying bad branches of thin-shelled hickory nuts, comprising the following steps:

[0005] S1, cutting: cutting the main stem above the damaged part to form a bridge groove on the main stem, wherein the bridge groove is located above the damaged part of the main stem;

[0006] S2, branch selection: cutting the branches regenerated from the base of the rhizome of the damaged plant as grafting branches;

[0007] S3, bridging: insert the cut end of the grafted branch into the bridging groove and wrap it with a film to complete the bridging.

[0008] By adopting the above technical scheme and the same-plant grafting method, the grafting between the main trunk and side branches grown from the same root system is easier to survive. By using reverse grafting, grafting from bottom to top, and using grafted branches to build a transmission bridge between the root system and the main stem, the root system can bypass the damaged part of the main stem to transport water and nutrients to the main stem, thereby avoiding the problems of slow growth, long cycle and high cost caused by replanting of damaged seedlings, effectively saving labor and improving resource utilization.

[0009] Optionally, the bridge groove is formed in an inverted T shape.

[0010] By adopting the above technical solution, the shape of the bridge groove is optimized, and the inverted T-shaped structure can make the fit between the grafted branch and the main stem more stable, which is conducive to the grafted branch to stably form a transport channel between the main stem and the root system.

[0011] Optionally, the bridging groove extends to the phloem of the main stem.

[0012] By adopting the above technical solution, the bridge groove is engraved to the phloem, so that the bridge groove has a suitable depth, which is conducive to inserting the graft into the bridge groove.

[0013] Optionally, the cut end of the graft is engaged with the bridging groove, and the cut end of the graft is smooth.

[0014] By adopting the above technical solution, the cut end of the grafted branch is relatively smooth, which can make the contact surface fit tightly, which is conducive to the rapid healing of the cambium, and enables the grafted branch to stably transfer water and nutrients from the root system to the main stem.

[0015] Optionally, the grafted branch grows robustly and is taller than the damaged part of the main stem.

[0016] By adopting the above technical solution and selecting healthy and strong grafting branches, the nutrient transmission capacity of the grafting branches can be guaranteed.

[0017] Optionally, after cutting the grafted branch in step S2, the remaining branches growing from the root system are removed, and the grafted branch connects the root system and the main stem.

[0018] By adopting the above technical solution, the branches growing on the remaining root systems are cut off, ensuring that nutrients and water can be transmitted to the upper part of the main stem through the grafted branches, which is conducive to the normal growth of the main stem.

[0019] Optionally, after step S3, new buds and new branches above the bridging groove are removed.

[0020] By adopting the above technical solution, the new buds and branches above the bridge groove are cut off, the part of the main stem that needs to be nourished is reduced, and nutrients are concentrated on the grafted upper main stem.

[0021] Optionally, the film is a starch-polyvinyl alcohol film.

[0022] By adopting the above technical scheme, starch-polyvinyl alcohol film is preferably used as the film to wrap the cut part. Since the starch-polyvinyl alcohol film has good water solubility and environmental protection, the subsequent film does not need to be treated separately and can be naturally degraded; and the film has excellent insect pest effect, can effectively wrap the cut part to promote the growth of the grafted branch, and can also reduce the erosion of the cut part by pests, which is conducive to the stable growth of the grafted branch.

[0023] Optionally, the film comprises pyrethroid microcapsules.

[0024] By adopting the above technical scheme, it is preferred to add pyrethroid microcapsules into the film. The pyrethroid microcapsules have high insecticidal activity and sustained-release effect. Then, wrapping the grafted part with the film can continuously exert an insecticidal effect at the cut part, reduce the damage of pests to the cut part, and make the grafted branch grow stably.

[0025] Optionally, the film further comprises monocaprylic acid glyceryl and / or quicklime.

[0026] By adopting the above technical solution, monocaprylic acid glyceryl has the characteristics of non-toxicity and safety and excellent antibacterial effect. Adding it to the film can give the film excellent antibacterial properties and reduce the erosion of bacteria and other microorganisms on the cut part. Quicklime has a broad-spectrum bactericidal effect and can prevent a variety of pests and diseases, which is beneficial for the film to protect the cut part from erosion by bacteria and pests and diseases.

[0027] In summary, this application has the following beneficial effects:

[0028] 1. The present application adopts the same-plant grafting method. The grafting between the main trunk and the side branches grown from the same root system is easier to survive. Reverse grafting is used, grafting from bottom to top, and a transmission bridge is built between the root system and the main stem using grafted branches, so that the root system can bypass the damaged part of the main stem to transport water and influence the main stem, thereby avoiding the problems of slow growth, long cycle and high cost caused by replanting of damaged seedlings, effectively saving labor and improving resource utilization.

[0029] 2. The cut end of the graft in this application is relatively smooth, which enables the contact surface to fit tightly, is conducive to the rapid healing of the cambium, and enables the graft to stably transfer water and nutrients from the root system to the main stem.

[0030] 3. In this application, the new buds and branches above the bridge groove are cut off to reduce the part of the main stem that needs to be nourished and concentrate nutrients on the grafted upper main stem. DETAILED DESCRIPTION

[0031] The present application is further described in detail below with reference to the embodiments.

[0032] Example

[0033] Example 1

[0034] The present application provides a bridging method for remedying bad branches of thin-shelled hickory nuts, comprising the following steps:

[0035] S1, cutting: cutting the main stem above the damaged part to form a bridge groove on the main stem, wherein the bridge groove is located above the damaged part of the main stem;

[0036] S2, branch selection: cutting the branches regenerated from the base of the rhizome of the damaged plant as grafting branches;

[0037] S3, bridging: insert the cut end of the grafted branch into the bridging groove and wrap it with a film to complete the bridging.

[0038] Through the same-plant grafting method, the grafting between the main trunk and side branches grown from the same root system is easier to survive. By using reverse grafting, grafting from bottom to top, and using grafted branches to build a transmission bridge between the root system and the main stem, the root system can bypass the damaged part of the main stem to transport water and nutrients to the main stem, thereby avoiding the problems of slow growth, long cycle and high cost caused by replanting of damaged seedlings, effectively saving labor and improving resource utilization.

[0039] Specifically, the bridge groove is formed into an inverted "T"-shaped structure, which can stably fit the cut end of the graft, which is conducive to the graft stably connecting the root system and the main stem. The bridge groove extends to the phloem of the main stem, so that the bridge groove has a certain depth, which can facilitate the graft to be stably fitted with the bridge groove.

[0040] Specifically, the graft is preferably a branch that is strong and has a higher growth height than the damaged part of the main stem, and then the graft can be smoothly embedded in the bridge groove after the end away from the root system is cut. The cut end of the graft needs to be cut relatively smoothly, so that the graft can be fully combined with the bridge groove, the formation layer can heal quickly, and then the graft can be used to stably transport water and nutrients from the root system to the main stem.

[0041] Specifically, after selecting the grafted branch, the branches growing on the remaining root systems and the new buds and branches above the bridge groove are cut off, so that the nutrients at the root system can be transported only from the grafted branch to the main stem above the damaged part, without other branches dispersing the nutrients in the root system, and the nutrients are concentrated to supply the main stem above the graft, so that the main stem can grow stably, and the thin-shelled pecan seedlings with damaged main stems can be at a similar growth progress as the thin-shelled pecan seedlings in the same period.

[0042] Example 2

[0043] In this embodiment, the film includes starch, polyvinyl alcohol and pyrethroid microcapsules. The film is prepared as follows: 5 g / L glycerol and 10 g / L glucose are weighed and placed in a container, deionized water is added, starch and PVAL are weighed at a mass ratio of 3:2 (the total amount of starch and polyvinyl alcohol is 60 g / L), added to water while stirring, placed on a magnetic stirrer and slowly stirred for 20 min, then slowly stirred for 20 min in a 90°C water bath, then stopped stirring and continued to heat for 40 min to obtain a starch-PVAL film-forming solution, 1 g / L pyrethroid microcapsules are added and continued to stir to obtain a film-forming solution. Place in a vacuum drying oven to degas to 0.06 MPa, stand for 15 min, pour into a mold, and dry in an oven at 40°C for 12 h to form a film.

[0044] The preparation of pyrethroid microcapsules is as follows: weigh 5g of emulsifier Triton X-100 in pure water, stir and dissolve in a water bath at a set temperature, and the speed is 700r / min. After adding 10g of natural pyrethroid original medicine to the evenly dispersed solution, the speed remains unchanged and the temperature is kept constant for 1h to form a stable oil-in-water (O / W) emulsion. Prepare 1mol / L NaOH solution and adjust the emulsion pH to 9. Weigh 0.96g of TEOS and add dropwise into the emulsion after adjusting the pH value with a syringe, and continue to react for 24h. After the reaction is completed, turn off the stirring, keep the temperature unchanged and age for 5h to obtain a microcapsule suspension. The obtained microcapsule emulsion is allowed to stand, separated, filtered, and freeze-dried to obtain the desired milky white microcapsule powder.

[0045] The test showed that the film had an antibacterial rate of 98.5% against Staphylococcus aureus; the film's 10-minute water solubility reached 85%.

[0046] Example 3

[0047] In this embodiment, the film includes starch, polyvinyl alcohol, pyrethroid microcapsules and monocaprylin. The film is prepared as follows: 0.2 g of monocaprylin and 2 g of glycerol are weighed, mixed, stirred and dispersed to obtain an emulsified antibacterial liquid.

[0048] Weigh 5g / L glycerol and 10g / L glucose in a container, add deionized water, weigh starch and PVAL (the total amount of starch and polyvinyl alcohol is 60g / L) in a mass ratio of 3:2, add to water while stirring, place on a magnetic stirrer and slowly stir for 20min, then slowly stir for 20min in a 90℃ water bath, then stop stirring and continue heating for 40min to obtain starch-PVAL film-forming liquid, add 1g / L pyrethroid microcapsules and emulsion antibacterial liquid, stir to obtain film-forming liquid. Place in a vacuum drying oven to degas to 0.06MPa, stand for 15min, pour into a mold, and dry in an oven at 40℃ for 12h to form a film.

[0049] After testing, the film's antibacterial rate against Staphylococcus aureus was 98.5%; the median lethal concentration for Culex pipiens larvae was 1.59 g / mL; the median lethal concentration for Myxomyces separata was 47.86 g / mL; and the film's 10-minute water solubility reached 85%.

[0050] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A bridging method for remedying bad branches of thin-shelled hickory, characterized in that: The following steps are involved: S1, cutting: cutting the main stem above the damaged part to form a bridge groove on the main stem, wherein the bridge groove is located above the damaged part of the main stem; S2, branch selection: cutting the branches regenerated from the base of the rhizome of the damaged plant as grafting branches; S3, bridging: insert the cut end of the grafted branch into the bridging groove and wrap it with a film to complete the bridging.

2. A bridging method for repairing bad branches of thin-shelled hickory according to claim 1, characterized in that: The bridge groove is formed in an inverted T shape.

3. A bridging method for repairing bad branches of thin-shelled hickory according to claim 2, characterized in that: The bridging groove extends to the main stem phloem.

4. A bridging method for repairing bad branches of thin-shelled hickory according to claim 3, characterized in that: The cut end of the graft is engaged with the bridge groove, and the cut end of the graft is smooth.

5. A bridging method for repairing bad branches of thin-shelled hickory nuts according to claim 4, characterized in that: The grafted branches grow robustly and are taller than the damaged part of the main stem.

6. A bridging method for repairing bad branches of thin-shelled hickory nuts according to claim 5, characterized in that: After the graft is cut in step S2, the remaining branches growing from the root system are removed, and the graft connects the root system and the main stem.

7. A bridging method for repairing bad branches of thin-shelled hickory nuts according to claim 1, characterized in that: After step S3, new buds and new branches above the bridge groove are removed.

8. The bridging method for repairing bad branches of thin-shelled hickory nuts according to claim 1, characterized in that: The film includes pyrethroid microcapsules.

9. A bridging method for repairing bad branches of thin-shelled hickory nuts according to claim 8, characterized in that: The film also includes glyceryl monocaprylate.