143 results about "Grafting method" patented technology

The application discloses a grafting seedling cultivation method for improving grafting survival rate, relates to the technical field of grafting seedling cultivation, and aims at the problem of poor success rate of seedling grafting. The application deeply fuses plant physiological characteristics, geometric morphological parameters and grafting mechanics principles, constructs a quantifiable and traceable method selection model, improves the adaptation efficiency of the grafting method by more than 3 times, realizes continuous optimization of the healing environment through continuous circulation of data comparison and parameter adjustment, guarantees efficient grafting process, sets evaluation indexes such as callus development, new shoot growth, environmental stability and root development, accurately judges the growth quality of the grafting seedling at different healing stages, realizes continuous optimization of the healing environment through continuous circulation of data comparison and parameter adjustment, and guarantees efficient grafting process.

The invention relates to the technical field of grafting devices, and discloses a grafting device for muskmelon seedling raising and a grafting method thereof.The grafting device comprises a cutting assembly, an L-shaped guide rail, a stock clamping assembly, a scion clamping assembly and a grafting fixing assembly; the long edge of the L-shaped guide rail is transversely arranged, the short edge is located at the upper end of the long edge, the L-shaped guide rail comprises a horizontal sliding block and a vertical sliding block, the horizontal sliding block is slidably connected to the long edge, the vertical sliding block is slidably connected to the short edge, and a grafting fixing assembly is fixed to the corner of the L-shaped guide rail. The stock clamping assemblies are fixed to the horizontal sliding block, the scion clamping assemblies are fixed to the vertical sliding block, and the cutting assembly is fixed to the middle section of the long edge of the L-shaped guide rail. According to the grafting device for muskmelon seedling raising and the grafting method thereof, the muskmelon grafting efficiency can be improved.

The invention discloses a polypropylene grafted copolymer self-reinforced polypropylene cable insulation material and a preparation method thereof, and relates to the field of high polymer materials. The preparation method of the material comprises the following steps: firstly, preparing a polypropylene grafted copolymer by a melt grafting method or an electron beam radiation grafting method; carrying out melt blending on the master batch and polypropylene to prepare a primary master batch; and finally, carrying out melt blending on the primary master batch, polypropylene, an antioxidant, a voltage stabilizer and a processing aid to obtain the cable insulating material. The polypropylene grafted copolymer induces the matrix polypropylene to generate a beta crystal form, and the beta crystal form and the polar vinyl monomer jointly realize self-enhancement independent of an elastomer, so that the toughness, the heat resistance and the direct-current dielectric property of the material are synchronously improved, and the problem of performance reduction caused by blending of traditional elastomers is solved; the method is suitable for the high-voltage direct-current cable insulation field.

The invention relates to the technical field of plant grafting, in particular to a method for improving the grafting survival rate of malania oleifera, which comprises the following steps: S1, scion preparation: treating branches of excellent perennial wild malania oleifera plants in the field, conveying the branches to an inoculation field, and disinfecting to obtain disinfected branches; s2, stock preparation; s3, grafting: preparing a scion by using the disinfected branch, treating a stock, tightening the stock and a grafting film for tongue grafting of the scion, and smearing a healing agent on a cut of the cut stock and the upper end of the grafting film; s4, management after grafting. Compared with the prior art, the method has the advantages that superior plant branches and artificially cultivated stocks are subjected to tongue grafting, and compared with bud grafting, the yield time of grafted seedlings is shortened; and then the branch of the malania oleifera superior plant is treated immediately when the scion is collected, so that the problems that the activity of the branch is reduced in the transportation process and the formation of the callus of the stock and scion cambium is slow are solved, the grafting survival rate is increased, and the grafted seedling obtaining time is shortened.

The invention discloses a grafted sapling cultivation method capable of improving the grafting survival rate, relates to the technical field of grafted sapling cultivation, and aims to solve the problem that the sapling grafting success rate is poor. According to the method, a quantifiable and traceable method selection model is constructed by deeply fusing plant physiological characteristics, geometrical morphology parameters and a grafting mechanics principle, so that the adaptation efficiency of the grafting method is improved by more than three times, and continuous optimization of a healing environment is realized through continuously circulating data comparison and parameter adjustment; according to the method, high-efficiency grafting is guaranteed, growth quality of grafted saplings in different healing stages can be accurately judged by setting evaluation indexes such as callus development, shoot growth amount, environmental stability and root development, continuous optimization of healing environment is realized by continuously circulating data comparison and parameter adjustment, and the survival rate of the saplings is increased. And high efficiency of the grafting process is ensured.

The invention discloses a Ilex rotunda grafting method which comprises the following steps: from late February to mid-March, preparing a 3-5-year-old Ilex rotunda rootstock for cultivation, and irrigating the Ilex rotunda rootstock; preparing a scion with double inclined planes; cutting a cut with the depth of 3cm in the rootstock, inserting the scion and aligning to the cambium; and carrying out double-layer binding by using a viscous PVC grafting film and a grafting soft film. The final-period management comprises the steps of sunshelter building, irrigation, bud picking, unbinding, pinching, fertilization and weeding. The problem that Ilex rotunda is difficult to breed is solved, the grafting survival rate is high, and the seedling raising period is short.

The invention relates to the technical field of coatings, in particular to a ceramic surface layer water-based color-changing paint, which is prepared from the following components in parts by weight: 40 to 50 parts of water-based acrylic resin, 35 to 45 parts of water-based polyurethane, 0.3 to 0.5 part of dispersing agent, 0.4 to 0.6 part of wetting agent, 2.5 to 3.5 parts of coalescing agent, 1.2 to 1.4 parts of flatting agent, 0.4 to 0.6 part of defoaming agent, 0.1 to 0.2 part of pH regulator and 12 to 18 parts of color filler. The activating component comprises the following components in parts by weight: 20-25 parts of a silane coupling agent, 12-18 parts of a siloxane polymer, 6-10 parts of nano silicon dioxide and 14-20 parts of epoxy resin grafted phosphate; the grafting method of the epoxy resin grafted phosphate ester comprises the following steps: reacting phosphate ester with a phenolic compound containing polyfunctional groups, and then reacting with epoxy resin. Through the synergistic effect of the silane coupling agent, the siloxane polymer, the nano silicon dioxide and the epoxy resin grafted phosphate, the technical problems of insufficient adhesive force, poor appearance and performance stability and the like in practical application can be solved.

The invention discloses a grafting method of a lantern tree, and relates to the technical field of plant grafting, and the main points of the technical scheme are that the grafting method comprises the following steps: S1, rootstock selection and treatment: selecting a pendant flower as a rootstock, cutting off the upper part of the rootstock, vertically and downwards cutting a notch on one side of the cross section of the rootstock, and forming a cut-grafting interface with the depth just reaching the xylem; s2, scion selection and treatment: selecting a lantern tree qualitative branch as a scion, cutting the scion into branch sections, cutting a long cut surface at the lower end of the scion by using a knife to expose a cambium, and cutting a short cut surface on the opposite side of the long cut surface to enable the lower end of the scion to be wedge-shaped; s3, grafting operation: inserting the pretreated long cut surface of the scion into a pre-cut vertical cut of the stock, so that the long cut surface of the scion is attached to a cambium on at least one side of the stock; a plastic film is wound upwards from the lower portion of the connector, and the combination portion of the stock and the scion is tightly bound and fixed and bagged. The invention fills up the blank of research in the field and is expected to cultivate a more heat-resistant lantern tree variety.

The utility model relates to the technical field of grafting devices, in particular to a vegetable grafting robot which comprises a rack, a cutting mechanism and a grafting mechanism, and the cutting mechanism is assembled on one side of the rack and used for cutting stocks and vegetables; the grafting mechanism comprises a conveying assembly and clamping assemblies, and the clamping assemblies are installed on the two sides of the rack and used for clamping vegetables; the conveying assembly is installed on the rack, located between the clamping assemblies and used for conveying grafted vegetables. The objective of the utility model is to improve the automation degree of grafting and increase the success rate of grafting based on the beveling attachment grafting method as the operation process basis of the grafting robot.

The invention discloses a cinnamomum migao bud stock grafting method. The method comprises the steps of seed selection, treatment, stock cultivation, scion collection, grafting, transplanting, seedling stage management and the like. The grafting method adopts a bud seedling stock grafting technology, is an effective way for accelerating the improved variety process of cinnamomum migao, effectively shortens the seedling raising period, is low in seedling raising cost, good in seedling quality, capable of realizing fast growth and early fruiting, simple and convenient to operate, easy to master by the masses, and convenient to popularize and apply.

This invention discloses a method for improving the asexual propagation of the new double-flowered crape myrtle variety 'Yunshang', comprising the following steps: (1) selecting a suitable grafting time; (2) selecting a suitable type of grafting rootstock; (3) selecting a suitable scion; and (4) selecting a suitable grafting method. By optimizing relevant process parameters using the method of this invention, the grafting survival rate of the new double-flowered crape myrtle variety 'Yunshang' is extremely high (96.67%), and its growth rate is also relatively fast (i.e., an annual growth of 167.68 cm). This allows for the rapid propagation of a large number of double-flowered crape myrtle 'Yunshang' seedlings, with excellent seedling quality. This method can maintain the superior traits of the new double-flowered crape myrtle variety 'Yunshang', meet the grafting requirements of the new double-flowered crape myrtle variety 'Yunshang', and quickly obtain high-quality seedlings of the new double-flowered crape myrtle variety 'Yunshang', which can be widely promoted and applied.

The invention discloses a TEPA modified bimetallic MOF material for CO2 adsorption and a preparation method of the TEPA modified bimetallic MOF material, and belongs to the technical field of CO2 adsorption. The preparation method comprises the following steps: firstly, by virtue of a solvothermal method, taking zinc nitrate hexahydrate and magnesium nitrate hexahydrate as bimetallic sources, and reacting with an organic ligand 2, 5-dihydroxy terephthalic acid, so as to prepare Zn-Mg bimetallic MOF-74; and then grafting tetraethylenepentamine to the skeleton of the bimetallic MOF-74 in an inert atmosphere by adopting a post-synthesis grafting method. The chemical adsorption site of TEPA is combined with the physical adsorption framework of Zn-Mg bimetal MOF-74, the regulation and control effect of bimetal on the pore structure and rich amino functional groups introduced by TEPA are utilized, the CO2 adsorption capacity, the amine efficiency and the cycle stability are improved, and the preparation method is mild in condition, simple in process, easy to expand and suitable for industrial production. The method has a wide application prospect in the fields of industrial flue gas CO2 capture and the like.

The invention provides an idesia grafting seedling raising method, relates to the technical field of grafting seedling raising, and adopts the technical scheme that the method comprises the steps of scion type determination, grafting method determination, grafting time determination and the like. According to the statistical data of the survival rate, the determination of appearance growth indexes of the grafted seedlings, and the fruit yield and quality, the optimal grafting mode is determined to be grafting in an axillary bud cut-grafting mode at the beginning of spring. The grafting combination most suitable for idesia polycarpa branch grafting is researched from different grafting periods and different grafting methods, a set of grafting method suitable for idesia polycarpa branches is established, and a set of feasible grafting method capable of achieving industrialized seedling raising is provided for asexual propagation of idesia polycarpa. And the method has important practical significance on the popularization of improved varieties of idesia polycarpa, the preservation of germplasm resources and the improvement of industrial quality and efficiency.

This invention belongs to the field of biomedical materials, specifically providing a highly permeable hydrophilic polyurethane artificial membrane based on chemical grafting and its preparation method, comprising the following steps: S1 - Substrate pretreatment: Immersing a polyurethane film in an organic solvent, ultrasonically cleaning and soaking for 0.5-2 hours, then removing and drying to constant weight to obtain a pretreated substrate; S2 - Preparation of hydrophilic modified polyurethane: Completely immersing the substrate obtained in step S1 in a hydrophilic modification solution, introducing an inert gas for 10-30 minutes, heating to 35-45°C, and reacting under stirring or shaking in the dark for 6-24 hours to obtain a hydrophilic modified polyurethane membrane; S3 - Post-treatment: The hydrophilic modified polyurethane membrane from step S2 is sequentially acid-washed, water-washed, and then vacuum-dried to obtain the hydrophilic polyurethane artificial membrane. The hydrophilic polyurethane artificial membrane of this invention, prepared by chemical grafting, possesses high permeability and excellent mechanical properties.

The application relates to the technical field of plant grafting, and particularly discloses a grafting method capable of improving disease resistance of eggplants, which comprises the following steps: Solanum nigrum seedling, eggplant seedling, seedling period management and grafting; in the application, the wild Solanum nigrum is selected as the stock, has the advantages of fast growth speed and good disease resistance, and can greatly improve the disease resistance and yield of the plant as the stock; the eggplant has a high incidence rate during the growth process, especially the occurrence of the yellow wilt disease is serious, and the yield is completely lost in serious cases; the grafting can solve the fundamental problem; the Solanum nigrum seed has a large amount, is easy to breed, and has a high germination rate; the special nutrient solution is sprayed, the wound healing speed of the grafting is greatly accelerated, and the healing effect is good; the grafting method of the sleeve pipe is adopted, the grafting speed is improved, the wound is protected, and the bacteria are prevented from invading the wound.

The invention relates to the technical field of crop planting, in particular to a watermelon seedling grafting method capable of rapidly healing a wound surface, which comprises the following steps of: performing strong seedling management before grafting a stock and a scion, protecting the wound surface by using healing-promoting gel during grafting operation, protecting the wound surface by using a film formed by the healing-promoting gel, and matching with environment management after grafting. According to the method, the grafting survival rate is greatly increased, the seedling recovery speed is high, the growth vigor is good, and wilting and disease phenomena are avoided in the healing process.

This invention discloses a grafting method for small-leaved red bean branches. It uses small-leaved red bean (… Ormosia microphylla ) as the scion, with red bean tree ( Ormosia hosiei This invention uses a grafting method that successfully expands the population size of *Ormosia henryi*, promoting its regeneration and rejuvenation. This invention is of great significance for the artificial assistance in de-emerging endangered plants.

The invention discloses a wild jujube grafting culture method. The method comprises the following steps: preparing a stock, preparing a wild jujube seedling, preparing an indolebutyric acid solution, picking a scion seed tree and the like. According to the wild jujube grafting culture method, the rootstock is subjected to root cutting, pruning and annular peeling treatment, so that new root germination and nutrient accumulation of the rootstock can be promoted, and the growth vigor of the rootstock and the adaptability of the rootstock to grafting are improved; the scions are soaked in an indolebutyric acid solution, rooting of the scions can be promoted, and the survival rate of the scions is increased; grafting is carried out strictly according to operation requirements in a cleft grafting mode, it is guaranteed that scions and stock cambium layers are well attached, and healing of grafted parts is facilitated; by means of shading treatment after grafting, reasonable water and fertilizer management, timely sprout removal and unbinding and effective pest control measures, good environmental conditions are created for growth of grafted seedlings, so that the survival rate of wild jujube grafting is remarkably increased, and the cultivated wild jujube seedlings grow robustly, are excellent in quality and high in yield and have good economic benefits and social benefits.

The invention relates to the technical field of plant grafting, and particularly discloses a Chinese rose grafting device and a grafting method.The Chinese rose grafting device comprises a frame and a grafting knife which is arranged on the frame and used for cutting Chinese roses, a clamping seat is arranged on the frame, a clamping hole for the Chinese roses to penetrate through is formed in the clamping seat, and a clamping device is arranged on the clamping seat; the clamping device comprises a clamping sleeve installed on the clamping base, a plurality of elastic pieces arranged on the end face of the clamping sleeve and used for conducting extrusion locking and unlocking on Chinese roses and a locking sleeve arranged on the clamping sleeve and used for conducting extrusion locking and unlocking on the elastic pieces, and the grafting knife is in sliding fit with the elastic pieces. After the Chinese rose is inserted into the clamping hole and the clamping sleeve, the elastic piece is extruded and locked through the locking sleeve, one end of the elastic piece rotates towards the position close to the peripheral face of the Chinese rose and drives the grafting knife to rotate towards the position close to the peripheral face of the Chinese rose, and at the moment, the grafting knife is obliquely arranged and pushed to cut the Chinese rose; the Chinese rose grafting method can improve the Chinese rose grafting quality.

The application discloses a method for grafting magnolia denudata with magnolia grandiflora, and belongs to the technical field of plant grafting and maintenance. The method for grafting magnolia denudata with magnolia grandiflora is characterized by using magnolia denudata as a stock, using a branch of magnolia grandiflora as a scion, adopting the bud-embedding grafting method, and combining with field water and fertilizer management in the later period to obtain the grafted plant. In the second year after grafting, a special spraying agent for magnolia grandiflora is sprayed. The grafting method is simple in process, and the survival rate of grafting is above 70% by selecting a suitable magnolia denudata stock, a suitable magnolia grandiflora scion, a suitable grafting time and a correct grafting mode, so that the propagation efficiency of magnolia grandiflora seedlings is greatly improved, and large-scale seedling raising of magnolia grandiflora can be realized, with low cost and high benefit. After the spraying agent is used, the number of flowers and the quality of flowers of magnolia grandiflora can be effectively improved, the spraying agent is convenient to use, is mild and safe, and the flowering ornamental property of magnolia grandiflora is improved.

The present invention relates to the technical field of mixed matrix membranes, and in particular to a crown ether-loaded UiO-66-NH2 mixed matrix membrane and its preparation method and application. The preparation method comprises: adding glacial acetic acid to a zirconium tetrachloride solution to obtain solution one; adding a crown ether to a 2,5-diaminoterephthalic acid solution to obtain solution two; mixing solution one and solution two and performing a hydrothermal reaction to obtain crown ether-loaded UiO-66-NH2; dispersing a positively charged polymer and crown ether-loaded UiO-66-NH2 in an organic solvent, mixing and forming a liquid film, and obtaining a crown ether-loaded UiO-66-NH2 mixed matrix membrane. The crown ether-loaded UiO-66-NH2 mixed matrix membrane of the present invention has good ion recognition ability, overcomes the defect of low selectivity of traditional polymer membranes; and overcomes the shortcomings of the existing chemical reaction grafting method, such as complex reaction process and high raw material cost, through in-situ coating technology.

The invention discloses a method for cultivating high-starch potatoes through grafting, and relates to the technical field of potato cultivation. The method comprises the following specific steps: (1) cultivating a high-starch potato stock and a common potato scion; (2) grafting the rootstock and the scion; (3) grafted plant treatment; (4) domestication treatment: carrying out stress treatment on the grafted seedlings for 10-15 days, then transferring the grafted seedlings outdoors for culture, and harvesting tubers; and (5) screening of high-starch germplasm: selecting tubers with high starch content for planting, repeatedly domesticating for 2-3 generations, and harvesting tubers to obtain the high-starch potato germplasm. According to the method, the high-starch potato seedlings and the common potato seedlings are grafted, aeroponic culture management is performed after grafting, domestication treatment is performed, the starch content of the grafted potatoes can be increased, and after multi-generation domestication, the high-starch potato germplasm is obtained through breeding. According to the method, the variety breeding process is shortened, and the problem that the high-starch potato germplasm is not created by adopting a grafting method at present is solved.

The invention provides a wood dyeing method, and belongs to the technical field of wood dyeing. The method comprises the following steps: bleaching wood, pretreating the bleached wood by using an inorganic alkaline solution, placing the pretreated wood in a cation modification solution for cation modification, and placing the cation modified wood in an acid dye dyeing solution for dyeing to obtain the cation modified dyed wood. The inorganic alkaline solution is used for pretreating the bleached wood, under the alkaline condition, hydroxyl groups on the surface of wood fibers are more easily activated, the reaction activity of the wood fibers is improved, cationic groups in the cationic modifier and hydroxyl groups in wood cellulose are more easily subjected to chemical reaction, and therefore more stable covalent bond combination is formed; more cationic modifiers are grafted to wood fibers through a chemical grafting method, more groups with positive charges are introduced to the surface of wood, then the dye uptake is increased, and the cationic modifier is suitable for dyeing processing of wood materials such as recombined decorative veneers and veneer veneers.

The invention relates to the technical field of white bark pine breeding, and particularly discloses a white bark pine multi-point sparrow-tongue grafting method, which comprises the following steps: firstly, selecting a branch with a full terminal bud at the middle upper part of a white bark pine as a scion, treating needle leaves, and cutting out specific positive and short cut surfaces; selecting and treating upper thicker lateral branches in the rootstock, and manufacturing fitting surfaces matched with the lateral branches; and finally, inserting the scions, binding with a PE film strip, and grafting 4-5 scions on one stock. According to the method, through accurate scion and stock treatment and multi-point grafting, the grafting survival rate is effectively increased, grafted seedling growth is promoted, germplasm resource preservation and large-scale breeding are facilitated, and the method has important application value in the field of pinus bungeana planting.

The invention relates to the technical field of coal gangue recycling, in particular to a coal gangue-based sulfydryl functional material as well as a preparation method and application thereof. The coal gangue-based sulfydryl functional material is prepared by adopting a calcining alkali fusion activation and mechanochemical grafting method. A dry grinding method is adopted for modification, solution participation is not needed in the whole process, waste liquid pollution generated by traditional wet modification (such as alkali fusion and acid leaching) is avoided, the green chemical principle is met, and the environmental risk is reduced. The coal gangue is used as a raw material, high-value utilization of solid waste is achieved, meanwhile, the preparation process is simple, the cost is low, and environmental benefits and economic benefits are achieved. The prepared modified coal gangue adsorbent shows good application potential in heavy metal wastewater treatment and heavy metal contaminated soil passivation remediation, and a feasible scheme is provided for a pollution treatment strategy of treating waste with waste.

The invention belongs to the technical field of wear-resistant material preparation, and provides a high-wear-resistant leakproof composite material for mechanical equipment and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing functional nano particles, loading a lubricant in a porous silicon dioxide core, fixing the lubricant on the surfaces of the particles by using an initiator, then carrying out surface polymerization of glycidyl methacrylate to form an inner polymer shell, and then sequentially constructing a functional inner polymer shell and a low-friction outer polymer shell by using a surface grafting method; secondly, a core-shell structure repairing microcapsule is prepared, a polymerizable repairing agent system is packaged in a core, isocyanate and water / hydroxyl react in an interface reaction to generate a polyurethane-urea shell, and when the microcapsule is broken due to stress, a catalytic activity center released by the shell can initiate in-situ polymerization of an in-core repairing agent; meanwhile, particles with a polymer-inorganic matter amphiphilic structure are prepared; and finally, uniformly dispersing the three functional additives and the dispersing agent into the base oil to finally obtain the liquid composite material.

The present invention discloses a polymer-modified colored anti-skid coating, comprising the following components: 50-70 parts of a modified epoxy resin, 20-30 parts of a curing agent, 0.2-0.4 parts of an interface agent, 0.2-0.5 parts of a light stabilizer, and 5-8 parts of a color paste. All parts are by weight. The present invention addresses the problems of poor adhesion to road surfaces, cracking, and aging associated with conventional colored protective coatings. By grafting the epoxy resin through a chemical reaction grafting method, cyanate groups are introduced, increasing the coating's flexibility. Simultaneously, the cyanate groups significantly enhance the epoxy resin's cross-linking structure, which, together with the interface agent, further improves the color protective coating's adhesion to the road surface. The present invention also discloses a construction process for the colored anti-skid coating, which boasts a simple preparation process and low cost.

The invention discloses a grafting method suitable for quickly renewing mulberry varieties in a mulberry field of middle-high-trunk mulberries. The grafting method comprises the steps of branch reserving, grafting, side branch removing, fixing, bag removing, core stopping, summer cutting, fertilizing, bud thinning, leaf picking, follow-up management and the like. The grafting method can be put into production in half a year, so that the production period is remarkably shortened, the waste of land resources and time is reduced, and the land cost is saved. Through variety optimization, the stress resistance of mulberry varieties can be remarkably improved, the unit yield of a mulberry field is increased, and the economic benefits of the silkworm and mulberry industry are improved. Meanwhile, excellent single plants can be rapidly propagated, biological, economic, genetic and other basic characters of the mulberry germplasm resources are observed, and the mulberry germplasm resources are rapidly identified.

The present application relates to a kind of difficult culture pathogen resistance identification method and its application, belong to the field of agriculture and forestry science, step 1: the culture screening of toxic source plant, plant to be identified and indicator plant;Step 2: grafting transmission, the toxic source plant screened only with difficult culture pathogen, the plant to be identified without difficult culture pathogen and indicator plant are arranged in position, and transmission is carried out using grafting method;Step 3: observation and detection, according to the disease cycle of difficult culture pathogen, the disease phenotype of plant to be identified and indicator plant in step 2 is observed, and the colonization, propagation of difficult culture pathogen is detected by PCR method;Step 4: disease resistance and pathogen running speed evaluation.Effectively solve the problem that the identification result is inaccurate due to the low inoculation rate of difficult culture pathogen using transmission medium, the inconsistency of inoculation source pathogen and other reasons, the error is larger in resistance identification work, etc.

The invention belongs to the technical field of planting, and particularly relates to a high-position grafting method for an old litchi tree, the method is suitable for being carried out in March to May or September to October every year, and the method specifically comprises the steps of stock treatment, scion treatment, grafting operation and management after grafting, the old litchi tree with the tree age of 10-30 years is selected as the stock, a semi-lignified current-year branch is selected as the scion, and the scion is selected as a semi-lignified current-year branch; a high-position grafting method is adopted for grafting, based on the toughness of semi-lignified current-year branches and control over the scion length, it is ensured that scions and stocks are tightly combined, the risk of fracture caused by external force is reduced, healing of the scions and the stocks is effectively promoted in the mode of section trimming, disinfection treatment and EM bacterial liquid spraying, and it is verified that the scions and the stocks are not prone to fracture. The grafting survival rate reaches 92% or above, fruits can be borne in 2-3 years, high yield can be recovered in 3-4 years, the average plant yield reaches 30 kg or above, and the economic life of old trees can be effectively prolonged.