A method of repairing a wound in a tree trunk

Abstract

The present application relates to the technical field of garden maintenance, and discloses a tree stem wound surface repairing method.The repairing method comprises the following steps: S1, a root system induction stage: first, the wound surface is cleaned, disinfected and treated with a preservative, then the upper edge of the wound surface is obliquely cut to expose the cambium layer, the cut is coated with a root system inducer, and then covered with peat soil matrix, sealed, moisturized and light-shielded; S2, a root system traction stage: the adventitious roots are guided to the ground by using a traction pipe, and water and fertilizer management is carried out; S3, a root system lignification promotion stage: the root system lignification is promoted by light control, exogenous chemical regulation and periodic water control.The repairing method induces the tree bark of the tree stem wound surface to quickly generate adventitious roots, uses the traction pipe and water and fertilizer induction to guide the root system to the ground, and then uses light control, exogenous chemical regulation and periodic water control and other measures to restore the nutrient transport function of the bark, so that the tree recovers normal growth, and the method is simple to operate, has strong environmental adaptability, strong universality and high survival rate.

Description

Technical Field

[0001] This invention relates to the field of garden maintenance technology, and in particular to a method for repairing wounds on tree trunks. Background Technology

[0002] Tree bark serves as a protective barrier, defending against pests, diseases, mechanical damage, and extreme weather. The inner phloem is responsible for transporting nutrients, and in some trees, it can even store them. However, biological attacks such as borers and pathogens, natural factors like extreme temperatures, lightning, strong winds, and fires, human activities such as mechanical impacts, improper pruning and construction damage, and animal bites or friction can all damage the bark, exposing the wood and creating wounds. This obstructs nutrient transport, allowing pathogens to invade the tree and posing a serious threat to its health and even survival. Repairing tree wounds is a common challenge in garden maintenance and the protection of ancient trees. While existing methods for repairing trunk wounds, such as applying healing agents, bark grafting, grafting, biological restoration, and physical protection, have some effectiveness, they also have many limitations.

[0003] CN 109041971 A discloses a method for bark grafting on tree wounds, including wound cleaning, wound disinfection, wound cutting, bark harvesting, medication application, close application, fixation, bandaging, and monitoring. This method can maximize the recovery of tree wounds through bark grafting and provide the nutrient delivery channels needed for tree survival. However, bark grafting relies on precise fitting, is highly dependent on the donor tree, has a low grafting success rate, and is prone to rejection reactions. CN 108377829 A discloses a method for repairing camphor tree trunks with insect holes, including girdling the trunk, applying indoleacetic acid solution, wrapping with moss matrix to promote rooting at the girdled site, and cutting and transplanting the trunk below the rooting site when the root system is growing vigorously. This method can not only completely eradicate the damage caused by wood-boring insects but also restore the ornamental and timber value of the camphor tree. However, the repair cycle is long, highly dependent on climate, and has poor environmental adaptability, making it difficult to promote and use on a large scale. CN 109197327 A discloses a method for grafting ancient and famous trees onto rootstocks. CN 109832025 A discloses a method for rejuvenating ancient trees by grafting. Both methods involve grafting bark onto rootstock to provide nutrients to the tree. However, rootstock grafting requires the support of a healthy mother tree, resulting in a low and unstable survival rate. CN102951959 A, CN 116616281 A, and CN105967847 A all repair trunk wounds by applying healing agents. However, the composition of various healing agents is complex, they have poor adaptability to different tree species, and their effectiveness is easily affected by temperature and humidity.

[0004] Furthermore, existing methods for repairing tree trunk wounds have the drawback of being limited to a small repair area. Therefore, there is an urgent need to develop a large-area tree wound repair technology that requires no transplantation, is easy to operate, has strong environmental adaptability, a high survival rate, and is widely applicable, in order to meet the needs of garden maintenance and ancient tree protection. Summary of the Invention

[0005] The present invention aims to at least solve one of the aforementioned technical problems existing in the prior art. Therefore, the object of the present invention is to provide a method for repairing wounds on tree trunks.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: This invention provides a method for repairing wounds on tree trunks, comprising the following steps: S1. Root induction stage: First, clean, disinfect and prevent decay of the wound. Then, make an oblique cut at the upper edge of the wound to expose the cambium. Apply root induction agent to the cut and cover with peat moss substrate. Seal and keep moist and shade it for maintenance. S2, Root Traction Stage: Using traction pipes to guide adventitious roots to the ground and manage water and fertilizer; S3, Root Lignification Stage: Root lignification is promoted through light control, exogenous chemical regulation, and periodic water control.

[0007] In some embodiments of the invention, the cleaning includes removing rotten bark and wood.

[0008] In some embodiments of the present invention, after the cleaning, the process further includes using a 7.0wt%-7.5wt% dextrorotatory cypermethrin insecticide fumigant to kill the hiding insects.

[0009] In some embodiments of the present invention, the disinfection includes spraying the wound with a 500-1000 times diluted carbendazim aqueous solution.

[0010] In some embodiments of the present invention, the anti-corrosion treatment includes applying benzene-free epoxy resin adhesive to the wound area.

[0011] In some embodiments of the present invention, the benzene-free epoxy resin adhesive is applied 2-4 times.

[0012] In some embodiments of the present invention, the root inducer includes indoleacetic acid and soil fungicide carried on clay slurry; the content of indoleacetic acid and soil fungicide in the clay slurry is selected from 5-20 mg / L, respectively.

[0013] In some embodiments of the present invention, the clay slurry comprises a mixture of clay and water in a mass ratio of (3-5):1.

[0014] In some embodiments of the present invention, the clay includes at least one of yellow clay, red clay, and bentonite.

[0015] In some embodiments of the present invention, the particle size of the clay is 60-80 mesh.

[0016] In some embodiments of the present invention, the root inducer is prepared by a method comprising the following steps: mixing clay with water to form a clay slurry; adding indoleacetic acid and soil fungicide to the clay slurry to obtain the root inducer.

[0017] In some embodiments of the present invention, the root inducing agent is applied to the obliquely cut portion with a thickness of 2-3 mm.

[0018] In some embodiments of the present invention, the peat substrate comprises peat with added indoleacetic acid and soil fungicide; the amount of indoleacetic acid and soil fungicide added to the peat is selected from 5-20 mg / kg, respectively.

[0019] In some embodiments of the present invention, the peat substrate is prepared by a method comprising the following steps: mixing indoleacetic acid and soil fungicide with peat, adding water and stirring to obtain the peat substrate; wherein the amount of water added is such that the peat does not drip water when squeezed tightly in the palm of the hand.

[0020] In some embodiments of the present invention, during the root induction stage, the peat moss matrix is ​​compacted into an elongated cylindrical shape according to the transverse width of the wound and then completely wraps the incision.

[0021] In some embodiments of the present invention, the diameter of the elongated cylindrical peat substrate is 8-10 cm.

[0022] Specifically, the shape and size of the peat substrate can be adaptively adjusted according to the size and number of wounds on the tree trunk to ensure that the cuts are fully covered and a stable environment for moisturizing and promoting root growth is provided.

[0023] In some embodiments of the present invention, the root induction stage, after covering with peat substrate, includes tightly wrapping the peat substrate around the stem with a film and covering it with a shading film to seal and retain moisture and provide shade for maintenance.

[0024] In some embodiments of the present invention, during the maintenance period, the film is removed every 6-8 days to allow ventilation, and atomized water is sprayed onto the peat substrate to keep it moist. The amount of water sprayed is such that the peat substrate does not drip water.

[0025] In some embodiments of the present invention, one end of the traction tube is buried 10-20cm underground, the other end is wrapped with peat moss matrix at the cut, and the remaining part is arranged close to the tree trunk and filled with peat moss matrix inside.

[0026] In some embodiments of the present invention, the traction tube is a semi-transparent plastic hose that has been split in half.

[0027] In some embodiments of the present invention, the diameter of the traction tube is 8-10 cm.

[0028] Specifically, the diameter of the traction tube can be selected based on the size and number of wounds on the tree trunk and the expected number of adventitious roots to be induced, so as to ensure that it can fully accommodate the root system and provide good guidance.

[0029] In some embodiments of the present invention, after the traction tube is arranged, it is fixed to the stem, and the traction tube is tightly wrapped around the stem with a film and covered with a light-blocking film to seal and moisturize and protect against light.

[0030] In some embodiments of the present invention, during the root traction stage, water and fertilizer management includes injecting 0.1wt%-0.5wt% of phosphorus and potassium compound fertilizer into the peat substrate of the traction tube 15-20cm away from the lowest root; the injection frequency is 12-15 days / time.

[0031] In some embodiments of the present invention, during the root lignification stage, light control includes exposing the roots to weak light of less than 1000 lux for 7-10 days, followed by exposure to natural or artificial light of 2000-5000 lux.

[0032] In some preferred embodiments of the present invention, the light control during the root lignification stage specifically includes: removing the shading film above the traction tube to allow the roots to receive weak light of less than 1000 lux; and after 7-10 days, removing the traction tube and the film to allow the roots to receive full light of 2000-5000 lux.

[0033] In some embodiments of the present invention, the exogenous chemical regulation during the root lignification stage includes: a) Spray the tree leaves with 0.01wt%-0.1wt% high-potassium foliar fertilizer; b) Spray the roots with 0.01-0.1 μmol / L lignification accelerator every 6-8 days. c) Spray the roots with a mineral element solution containing 0.01wt%-0.05wt% Ca, 0.005wt%-0.01wt% B, and 0.001wt%-0.005wt% Cu, at a frequency of 6-8 days / time.

[0034] In some embodiments of the present invention, the high-potassium foliar fertilizer comprises 0.1wt%-0.3wt% potassium dihydrogen phosphate and 0.01wt%-0.03wt% potassium silicate.

[0035] In some preferred embodiments of the present invention, the high-potassium foliar fertilizer comprises 0.1wt%-0.2wt% potassium dihydrogen phosphate and 0.01wt%-0.02wt% potassium silicate.

[0036] In some embodiments of the present invention, the high-potassium foliar fertilizer is sprayed 1-2 times.

[0037] In some embodiments of the present invention, the lignification accelerator includes epibranolactone (EBR).

[0038] In some embodiments of the present invention, the mineral element solution comprises a mixture containing calcium chloride, boric acid and copper sulfate pentahydrate; wherein the content of calcium chloride is 0.028wt%-0.139wt%, the content of boric acid is 0.029wt%-0.057wt%, and the content of copper sulfate pentahydrate is 0.0039wt%-0.0197wt%.

[0039] In some embodiments of the present invention, the periodic water control during the root lignification stage includes periodic drought-rehydration cycles on the peat substrate surrounding the roots, with each drought lasting 2-3 days.

[0040] In some embodiments of the present invention, the duration of the root lignification stage is 4-8 weeks.

[0041] In some embodiments of the present invention, the trees include at least one of Elaeocarpus acuminata, Ficus microcarpa, Vitex negundo, Plumeria rubra, and Cinnamomum camphora.

[0042] The basic principles of this invention are explained as follows: The method for repairing tree trunk wounds provided by this invention mimics the natural repair mechanism of trees and significantly enhances and accelerates this process through artificial intervention. Ultimately, it guides the root system to replace the damaged bark, achieving functional repair of large-area wounds. Specifically: 1) Root Induction Stage: First, the wound surface is cleaned, rotten tissue is removed, and disinfection is performed to clear obstacles for new tissue, prevent competition from pathogens and secondary infection, and isolate decay fungi through antiseptic treatment to ensure that new roots start in a clean environment; then, a slanted cut is made at the healthy part of the wound surface to precisely expose the cambium cells with the strongest meristematic capacity, serving as the origin of adventitious roots, and a root inducing agent is applied to the cut. Indoleacetic acid in the root inducing agent is the core hormone signal that stimulates cell division and root primordia formation, while soil fungicide can protect the fragile cut from soil-borne pathogens. Clay slurry is used as a carrier, as clay is readily available, inexpensive, and can enhance the adhesion of functional components; peat moss substrate covering provides a dark, moist, and breathable physical environment, simulating the ideal conditions for root growth in soil; darkness is a necessary condition for the initiation and growth of root primordia, so a sealed, moisturizing, and light-blocking maintenance method is adopted to strictly ensure the light-proof nature of the internal environment; 2) Root Traction Stage: This stage mainly utilizes the geotropism and nutrient tropism of roots. A protected artificial soil environment is constructed from the newly formed roots to the ground through a traction tube. On the one hand, this guides the roots to grow towards the ground, and on the other hand, it prevents the roots from drying out or aging in the air. New substrate is filled into the tube, providing a continuous and familiar growth medium for the roots to extend forward. Phosphorus and potassium compound fertilizer is regularly injected into the lower end of the traction tube. By utilizing the roots' nutrient tropism, the tendency to grow towards the ground is strengthened, providing bait and energy for root growth and ensuring that the roots can successfully attach to the ground. 3) Root Lignification Stage: During this stage, high-potassium foliar fertilizers (such as phosphorus and potassium fertilizers, potassium silicate) are sprayed on the leaves. Nutrients are absorbed and synthesized through the leaves and transported downwards via the remaining vascular system, providing logistical support for root maturation. Silicon also enhances cell wall strength. Spraying the roots with brassinolide and mineral element solutions is also beneficial. Brassinolide significantly promotes plant cell differentiation and lignin synthesis, acting as a key hormone signal to accelerate root vascular bundle development and lignification. In mineral element solutions containing Ca, B, and Cu, calcium is a component of the cell wall lamina, boron participates in lignin formation and transport, and copper is a component of lignin. As a cofactor for lignin synthase, the mineral element solution directly provides the key raw materials for building cell walls and lignin; through gradual light enhancement, the emergence of seedlings is simulated, allowing the roots to gradually adapt to the light environment and avoiding stress responses; through the drought-rehydration cycle, moderate water stress can stimulate the plant to produce abscisic acid, thereby inducing more developed roots and accelerating the differentiation and thickening of xylem vessels, enhancing its stress resistance and water transport efficiency; this stage, based on nutrient and hormone regulation, as well as environmental stress training, promotes the development of root vascular tissue and the lignification and reinforcement of cell walls, enabling it to have conduction and support functions similar to those of tree trunk xylem.

[0043] Compared with the prior art, the beneficial effects of the present invention are: 1) The method for repairing tree trunk wounds provided by this invention induces the rapid generation of adventitious roots from the bark of the tree trunk wound. The roots are then introduced into the ground using traction tubes and water and fertilizer induction. Then, through measures such as light control, exogenous chemical regulation, and periodic water control, the nutrient transport function of the bark is restored, allowing the tree to resume normal growth. This method does not require bark transplantation, does not rely on donor trees, and has a high survival rate. It does not rely on specific healing agents, and the effect is less affected by temperature and humidity. It is widely applicable to various tree species. It does not require trunk cutting or transplantation, is simple to operate, and has strong environmental adaptability. 2) The tree trunk wound repair method provided by the present invention can repair large-area wounds, efficiently restore the tree's nutrient transport function, and realize the tree's in-situ rejuvenation and healthy growth. Attached Figure Description

[0044] Figure 1 The image shown is a photograph of the stem wound of *Elaeocarpus acuminata* in the example. Figure 2 The image shown is a photograph of the wound cleaning process of *Elaeocarpus acuminata* in the example. Figure 3 This is a photograph of the root system traction after adventitious roots were induced in *Elaeocarpus acuminata* in the example; Figure 4 The image shown is a photograph of the root system of *Elaeocarpus acuminata* being pulled to the ground in the example. Figure 5 The image shown is a photograph of the successful root system of *Elaeocarpus acuminata* in the example, which was then successfully guided to the ground and lignified. Detailed Implementation

[0045] The present invention will be further described in detail below through specific embodiments. Unless otherwise specified, the raw materials, reagents, or apparatus used in the embodiments can be obtained from conventional commercial sources or by existing technical methods. Unless otherwise specified, the experimental or testing methods are conventional methods in the art.

[0046] Example This embodiment provides a method for repairing wounds on tree trunks, and uses this method to repair a damaged *Elaeocarpus lanceolata* tree. The *Elaeocarpus lanceolata* has a diameter at breast height (DBH) of approximately 35 cm, with a large area of ​​long, strip-shaped damage to the bark of the trunk, approximately 0.8 m in length, and an average width of about 1 / 3 of the cross-sectional perimeter (the maximum width is about 2 / 3 of the cross-sectional perimeter). Some branches and leaves are withered and yellow, and the tree is in critical condition. The repair steps are as follows: S11. Cleaning the stem wound: Use a scraper and grinder to clean the rotten bark and wood of the wound. Use 7.2wt% dextrorotatory cypermethrin insecticide fogging agent to kill hidden insects. Then spray the wound with 800 times carbendazim aqueous solution for disinfection. After disinfection and the wound is completely dry, waterproof and anti-corrosion treatment is applied to the exposed wood. The specific method is to brush a layer of benzene-free epoxy resin on the surface of the wood, and brush another layer after it dries, until three layers of benzene-free epoxy resin are applied. S12. Pass the yellow mud through a 60-80 mesh stainless steel sieve. Mix the sieved yellow mud with water at a mass ratio of 4:1 to form a yellow mud slurry. Then add indoleacetic acid and soil fungicide to the yellow mud slurry. The content of both in the yellow mud slurry is 10mg / L. Mix thoroughly to obtain a root inducing agent. Make a slanted cut on the upper part of the bark wound with a knife to expose the cambium layer. Apply the root inducing agent to the cut with a thickness of 2-3mm. S13. Mix indoleacetic acid and soil fungicide with peat moss. The addition amount of indoleacetic acid and soil fungicide in peat moss is 10 mg / kg. Add water and stir. The amount of water added should be such that the peat moss does not drip water when squeezed tightly in the palm of your hand. Mix thoroughly to obtain peat moss matrix. Knead the peat moss matrix into a long cylinder with a diameter of 10 cm. Completely wrap the cut. Then wrap the trunk tightly with plastic wrap. Then wrap a layer of black light-blocking film to make the inside opaque. S14. Remove the plastic wrap every week to allow for ventilation. If the substrate is relatively dry, spray with a fine mist of water. The amount of water should be such that the substrate does not drip. Continue to maintain the substrate until adventitious roots have formed. S21. Remove the plastic wrap and shade film to expose the peat moss substrate. Use a semi-transparent plastic tube with a 10cm aperture, cut in half, to make a root traction tube. Arrange the root traction tube from bottom to top, with one end inserted into the ground to a depth of 15cm, and the other end wrapped with peat moss at the cut. The rest of the traction tube is arranged close to the trunk and filled with new peat moss. After the traction tube is arranged, fix it to the trunk with cable ties, then wrap the traction tube and trunk with plastic wrap, and finally wrap with black shade film to ensure internal heat preservation, moisture retention and light blocking. S22. Regularly observe the root growth. Every 14 days, inject 0.3wt% phosphorus and potassium compound fertilizer into the peat substrate in the traction tube 15-20cm away from the lowest root to induce new roots to grow towards the ground until a sufficient number of roots reach the ground. S31. Spray the tree leaves with 0.1wt% potassium dihydrogen phosphate and 0.01wt% potassium silicate to promote root maturation; remove the black shading film to allow some light to pass through the plastic wrap and semi-transparent traction tube for 7-10 days, then remove the plastic wrap and semi-transparent traction tube to allow the roots to receive full sunlight (light intensity 2000-5000 lux); during this period, spray the roots with 0.05μmol / L brassinolide every 7 days to promote xylem cell differentiation and enhance cell wall cross-linking. Spray the roots once with a mixture of 0.1wt% calcium chloride, 0.05wt% boric acid, and 0.01wt% copper sulfate pentahydrate to provide the calcium, boron, and copper elements that are crucial for lignin cross-linking. Spray the peat substrate with water again after it has dried for 2-3 days. Through the periodic drought-rehydration cycle, the roots are hardened by controlled watering. When the roots change from milky white / semi-transparent to light brown to reddish brown, it indicates that the roots have successfully lignified and can provide nutrients to the tree normally. The well-developed and robust root system can also provide strong support for the tree.

[0047] Figure 1 The image shown is a photograph of the stem wound of *Elaeocarpus acuminata* in the example. Figure 2 The image shown is a photograph of the wound cleaning process of *Elaeocarpus acuminata* in the example. Figure 3 The image shown is a photograph of the root system after adventitious roots were induced in *Elaeocarpus acuminata* in the example. Figure 3 (a) and (b) in the image are photos taken from different angles. Figure 4 The image shown is a photograph of the root system of *Elaeocarpus acuminata* being pulled to the ground in the example. Figure 5 The image shown is a photograph of the successfully guided and lignified roots of *Elaeocarpus lanceolata* in the embodiment. Figures 1-5 It is known that the damaged area of ​​the Elaeocarpus acuminata trunk was relatively large. After adopting the repair method provided by this invention, adventitious roots formed at the wound incision site on the 26th day of the root induction stage. After half a year, the adventitious roots were successfully pulled to the ground. In the root lignification stage, after 5 weeks of lignification transformation, the nutrient transport function of the bark was restored, and the growth of the Elaeocarpus acuminata also returned to normal.

Claims

1. A method for repairing wounds on tree trunks, characterized in that, Includes the following steps: S1. Root Induction Stage: First, clean, disinfect, and prevent septic treatment of the wound surface. Then, make an oblique cut at the upper edge of the wound surface to expose the cambium layer. Apply a root inducing agent to the cut and cover it with peat moss matrix. Seal and retain moisture while protecting from light. The root inducing agent includes indoleacetic acid (IAA) and soil fungicide carried by clay slurry. The content of IAA and soil fungicide in the clay slurry is selected from 5-20 mg / L, respectively. The peat moss matrix includes peat moss with added IAA and soil fungicide. The amount of IAA and soil fungicide added to the peat moss is selected from 5-20 mg / kg, respectively. S2. Root Traction Stage: Adventitious roots are guided to the ground using traction tubes, and water and fertilizer management is carried out. The traction tube is a semi-transparent plastic tube that has been split in half. One end is buried 10-20cm underground, and the other end is wrapped with peat moss substrate at the cut. The remaining part is placed close to the trunk and filled with peat moss substrate. The water and fertilizer management includes injecting 0.1wt%-0.5wt% phosphorus and potassium compound fertilizer into the peat moss substrate of the traction tube 15-20cm away from the lowest root system. The injection frequency is 12-15 days / time. S3. Root Lignification Stage: Root lignification is promoted through light control, exogenous chemical regulation, and periodic water control. Light control includes exposing the roots to weak light (less than 1000 lux) for 7-10 days, followed by exposure to natural or artificial light (2000-5000 lux). Exogenous chemical regulation includes spraying the tree leaves with 0.01wt%-0.1wt% high-potassium foliar fertilizer; spraying the roots with 0.01-0.1μmol / L lignification promoter every 6-8 days; and spraying the roots with a mineral element solution containing 0.01wt%-0.05wt% Ca, 0.005wt%-0.01wt% B, and 0.001wt%-0.005wt% Cu every 6-8 days. Periodic water control includes periodic drought-rehydration cycles on the peat moss substrate surrounding the roots, with each drought lasting 2-3 days.

2. The repair method according to claim 1, characterized in that, The root inducing agent is applied to the obliquely cut area with a thickness of 2-3 mm.

3. The repair method according to claim 1 or 2, characterized in that, The trees include at least one of Elaeocarpus acuminata, Ficus microcarpa, Vitex negundo, Plumeria rubra, and Cinnamomum camphora.

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