CN114698477A

CN114698477A - Grafting propagation method for ornamental Chinese flowering crabapple

Info

Publication number: CN114698477A
Application number: CN202210499021.7A
Authority: CN
Inventors: 李剑雄; 徐小云; 郭冉; 马媛媛; 王海滔
Original assignee: Beijing Taoranting Park Management Office
Current assignee: Beijing Taoranting Park Management Office
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-07-05

Abstract

The invention relates to a method for grafting ornamental malus spectabilis, which comprises the following steps: selecting a bare-cut strip on an ornamental Chinese flowering apple plant, and carrying out bud carving treatment on hidden buds on the bare-cut strip; carrying out branch drawing treatment on the overgrown strips subjected to bud carving treatment until hidden buds sprout; taking down the germinated hidden bud and grafting the bud onto the stock in an inverted T-shaped bud grafting mode; wrapping the moist soil around the inverted "T" shaped bud and removing the wrapped moist soil after 8 to 12 days (e.g., about 10 days); removing the sprouts on the stock, and pinching the new shoots to obtain the grafted seedlings. The method can utilize the hidden buds on the overgrown strips as the propagation materials, not only can change waste into valuable, but also can improve the utilization rate of the hidden buds, has the advantages of simple and convenient operation, low cost, short period, quick response, high survival rate and the like, and is particularly suitable for breeding new and excellent ornamental Chinese flowering crabapple varieties with rare parent trees.

Description

Grafting propagation method for ornamental Chinese flowering crabapple

Technical Field

The invention relates to a grafting propagation method of ornamental malus spectabilis, in particular to a method for grafting by utilizing hidden buds on bare-grown branches of the ornamental malus spectabilis.

Background

The ornamental crabapple is a population with special ornamental value in the Malus of Rosaceae, is mostly deciduous tree or small tree, is mainly distributed in the continental Eurasia and the North America, and China is the resource distribution center of the crabapple. In the 18 th century, Chinese begonia varieties are spread to western countries, and are hybridized with local varieties for multiple times under natural conditions, and a plurality of begonia varieties with stable shapes and excellent landscape performance are screened out through continuous breeding and domestication of plant researchers. The ornamental begonia of the new excellent variety has great market potential.

For the cultivated new high-quality variety of begonia, in the early stage of popularization, because the number of stock tree is rare, most importantly, the effect that the begonia can be grafted in the current year, shaped in the next year and can stably blossom and bear fruits can be achieved by a small amount of samples (scions) and utilizing the grafting technology to rapidly propagate in large quantities.

However, at present, cleft grafting, bud grafting and other modes are mostly adopted for the malus ornamental malus, and branches with plump buds in 1-2 years are preferably selected as scions. The ornamental crabapple has the characteristics that a bare strip is often grown, the other characteristic is that the bud points on the bare strip are few and most of hidden buds, and the hidden buds on the bare strip of the ornamental crabapple are particularly difficult to bud and survive, so the bare strips with a large number of hidden buds are rarely used in the grafting technology.

At present, the technology of utilizing the hidden bud grafting technology is rarely used. In the literature of experimental research on introduction of new varieties of pomegranate with soft seeds by cryptogamic grafting through cryptogamic grafting, which is reported in 11 th year 2014 of Chinese gardening abstracts, a method for grafting through cryptogamic grafting is reported, the method is characterized in that scions are collected in a growing season and are grafted through the cryptogamic germination force, the core technology of grafting survival is generally cleft grafting, bagging and moisturizing are carried out after grafting, an arched shed is built, double moisturizing is realized, and the scions and stocks grow synchronously, but the method needs to adopt the measures of bagging and moisturizing, the arched shed building and the like, the operation is complicated, the grafting cost is high, more importantly, the inventor finds that the survival rate is very low by grafting through the method by using the cryptogamic bud on the bare-length strip of the ornamental crabapple.

CN202010484786.4 discloses a method for reconstructing a low-effect plum garden, which utilizes the long life of the hidden bud of a plum tree, the hidden bud of the base part is easy to be extracted into a long-stalked branch, the long-stalked branch formed by the hidden bud of the base part is reconstructed, the new long-stalked branch at the base part of the plum tree to be reconstructed is preferentially kept and cultured when the plum tree is trimmed in summer, and the variety is updated by a bud grafting mode and then cultured; however, in this method, the bud of the plum variety to be grafted is selected as the scion, and the bare-shoot shoots from the bare-shoot shoots are used as the rootstock, rather than directly using the bare-shoot shoots on the bare-shoot shoots as the scion, so that the method cannot be used for grafting and propagation by using the bare-shoot shoots on the bare-shoot shoots of the ornamental crabapples as the scion.

At present, an effective and simple method for grafting the hidden bud on the appreciative crabapple strip to accelerate the propagation of the ornamental crabapple is urgently needed.

Disclosure of Invention

In order to solve one or more of the above problems in the prior art, the present invention provides a method for grafting ornamental crabapple, which is characterized by comprising the following steps:

(1) scion treatment: selecting a bare-cut strip on an ornamental Chinese flowering apple plant, and carrying out bud carving treatment on hidden buds on the bare-cut strip;

(2) branch pulling treatment: carrying out branch drawing treatment on the overgrown strips subjected to bud carving treatment until hidden buds sprout;

(3) grafting treatment: taking down the budding hidden bud and grafting the bud onto the stock in an inverted T-shaped bud grafting mode;

(4) wrapping a mud ring: wrapping the moist soil around the inverted "T" shaped bud and removing the wrapped moist soil after 8 to 12 days (e.g., about 10 days);

(5) and (3) management after grafting: removing the sprouts on the stock, and pinching the new shoots to obtain the grafted seedlings.

Compared with the prior art, the invention has the following technical advantages:

(1) the method can change waste into valuable, and can utilize the hidden buds which are difficult to germinate on the overground strips which are trimmed off frequently because of the overground strips for robbing fertilizers for nutrition as the propagation materials.

(2) The method can fully utilize the hidden buds on the overgrown branches, perform inverted T-shaped bud grafting after bud carving, take a measure of covering mud rings, and improve the utilization rate of the overgrown branch hidden buds.

(3) The method of the invention adopts measures such as branch pulling and mud ring wrapping, and the like, thereby obviously shortening the germination time.

(4) The method can realize the survival rate of more than 95 percent by measures of bud carving, branch pulling, mud ring wrapping, cutting of the diversion trench and the like.

(5) The method of the invention has high survival rate and simple and convenient operation, can quickly breed the new excellent crabapple, improves the grafting quantity, and is particularly suitable for new excellent ornamental crabapple varieties with rare parent trees.

Drawings

FIG. 1a shows a schematic representation of a freebar;

FIG. 1b shows a schematic view of a carved bud on an implicit bud;

FIG. 1c shows a schematic drawing of a branch;

FIG. 1d shows a schematic view of a bud which is expanded and removed;

FIG. 1e is a schematic view showing that a diversion trench is formed at the lower end of the rootstock after the inverted T-shaped bud grafting;

FIG. 1f shows a schematic view of a sticky rice grafting tape covering the bud after the grafting tape is wound around the interface;

FIG. 1g shows a schematic diagram of soil spraying on a plastic wrap;

FIG. 1h shows a schematic of wrapping a mud ring;

FIG. 1i shows a schematic drawing of the demolition of the mud ring after 10 days;

FIG. 1j shows a schematic of a shoot that survives and newly shoots;

FIG. 2a shows a vain strip upper bud slice of the hidden bud:

FIG. 2b shows the inverted T-shaped budding, wherein 1 represents the inverted T-shaped cut and b represents the guiding groove;

FIG. 2c shows the bud covered with the sticky rice grafting band. Preventing infection when wrapping the soil;

FIG. 2d shows soil drenched with a low concentration carbendazim solution;

figure 2e shows the case of the wrap.

FIG. 3a shows that the surface temperature of the shoot measured by the temperature measuring gun in example 1 is 32.6 ℃;

FIG. 3b shows the soil wrapped cling film being unraveled in example 1, with the temperature inside the wrapping measured at 30.2 ℃;

FIG. 4a shows that after the soil wrapping was completely removed in example 1, greenish spots at the sprout sites were seen and a sprout had occurred;

FIG. 4b shows that in example 1, budding was successful and shoots were developed.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

As described above, the present invention provides a method for grafting ornamental crabapple, which is characterized by comprising the following steps:

(1) scion treatment: selecting a bare strip on an ornamental Chinese flowering apple plant, and carrying out bud carving treatment on hidden buds (preferably hidden buds at bald parts) on the bare strip;

(3) grafting treatment: taking down the germinated hidden bud and grafting the bud onto the stock in an inverted T-shaped bud grafting mode;

(5) and (3) management after grafting: removing the sprouts sprouted from the rootstock, and pinching the new shoots to obtain grafted seedlings.

In some preferred embodiments, the rootstock is an eight-rowed crab (Malus robusta Rehd) rootstock or a cognac rubus suavissimus (palp.) rehe. var. mengshanensis g.z. qian) seedling rootstock; preferably, the rootstock is a rootstock with the seedling age of 2 to 3 years and/or the diameter of the trunk of 2 to 3 cm.

In other preferred embodiments, the scored bud is a bud scored 0.5 to 1.5cm (e.g., 1cm) above the hidden bud; preferably, the length of the carved bud is up to one third to two thirds (e.g. one half) of the circumference of the shoot, and the carved bud is deep into xylem;

in other preferred embodiments, the draw is bowed by using an angle opener or a rope to draw the free length of the strip at an angle of 80 to 100 degrees (e.g., 90 degrees).

In other preferred embodiments, the grafting time of the grafting is at or after the germination of the hidden bud subjected to bud carving treatment on the bare-cut strip.

In other preferred embodiments, the moist soil is a moist soil obtained after spraying the soil with the carbendazim solution. The concentration of the carbendazim solution is not particularly limited, and the carbendazim solution can be used according to the using concentration according to the specification, for example, the carbendazim solution is 1000 times of carbendazim (the effective component of the carbendazim solution is N- (2-benzimidazole) -methyl carbamate, the content of the effective component is 50 weight percent, and the type of the carbendazim solution is wettable powder). For soil moisture, the degree of moisture of the moist soil is usually regarded as the degree of clumping, and loosening is preferable.

In other preferred embodiments, the inverted "T" shaped interface is formed by: the branches and leaves in the range of 8-12 cm (for example, 10 cm) above the root of the rootstock are removed; then transversely cutting the part without scars to the xylem to form a transverse cut, wherein the width of the transverse cut is about half of the thickness of the rootstock; longitudinally cutting the middle of the transverse knife edge upwards to the xylem to form a longitudinal cut, wherein the length of the longitudinal cut is 1 cm-2 cm (for example, 1.5 cm); thereby forming an inverted "T" interface.

In other preferred embodiments, said removing of the germinating cryptoblasts is performed by: taking buds at the hidden buds where the spindly strips sprout by adopting a two-knife method, wherein a first knife transversely cuts at a position 1cm below the buds (the width is about half of the thickness of a scion for example) to the xylem, a second knife obliquely cuts from top to bottom to the transverse cut position from 1cm to 2cm above the bud points, and then a shield-shaped bud slice is taken down; preferably, the shield-shaped sheeting has a wood part.

In other preferred embodiments, the grafting is performed by: the phloem layers on the two sides of the inverted T-shaped incision are opened, the bud slices are inserted, and the lower parts of the bud slices are aligned with the inverted T-shaped transverse incision.

In other preferred embodiments, the diversion trench is vertically cut at the lower right or lower left of the inverted "T" shaped interface.

In other preferred embodiments, a grafting band (such as a common grafting band) is used for wrapping the wound from bottom to top in a winding way, so that the bud slices are attached to the rootstock and the bud points are kept exposed; in some embodiments, in the presence of the channels, the wound is wrapped with a grafting tape from bottom to top while keeping both the sprout points and the channels exposed.

In some more specific embodiments, the bare-cut strip (as scion) can be selected from 1-2 years old and strong bare-cut strip on the new superior variety crabapple in late 4 months, and bud carving is carried out 2cm above the hidden bud, and the length of the bud carving reaches 1/2, which is the branch circumference, and reaches xylem deeply. And then, the bare-ends are pulled into bow shapes by using an angle opener or a rope, and the angle is close to 90 degrees. The grafting time can be that after the measures of bare-grown strip collection, when the hidden bud just sprouts, the bud can be taken for grafting.

In some more specific embodiments, the grafting method is to remove branches and leaves 10cm above the root of the rootstock (such as Malus spectabilis) to make the stem smooth and facilitate grafting. Then, a cut is transversely cut at the smooth and scarless part, and the width of the cut is about half of the thickness of the stock. And longitudinally cutting the middle of the transverse knife edge upwards by about 1.5cm, and finally forming an inverted T-shaped interface when the knife is inserted to the depth of the xylem. Then, buds are picked up at the hidden bud part where the spindly strip sprouts by adopting a two-knife method. The first cut is transversely cut at a position 1cm below the bud, the width of the first cut is about half of the thickness of the scion, and the first cut is deep to xylem. The upper part of the second knife bud point, 1cm, is cut obliquely from top to bottom to the transverse knife, and the shield-shaped bud slice (with some xylem to avoid the injury of the bud body which just sprouts) is taken down rapidly. At the moment, the tough cortex layers on two sides of the inverted T-shaped cut are opened by a tool nose, the bud slices are inserted, the lower parts of the bud slices are aligned with the inverted T-shaped transverse cuts, and then a tool is vertically cut downwards at the right lower part of the inverted T-shaped interface to be used as a diversion trench, so that sap can be conveniently led out when the wound is generated in summer, and the formation of callus is facilitated. Finally, the wound is tightly wrapped by a common grafting belt from bottom to top, so that the bud slices are tightly attached to the rootstock, and the bud points and the diversion trenches are exposed.

In some more specific embodiments, when wrapping the mud ring, a low-concentration carbendazim solution can be prepared first, and the soil is sprayed wet, and the soil moisture degree is preferably that the soil is held to be agglomerated and loosened. Wrap up the outer round of interface at T type bud grafting with plastic wrap for the moist soil, so can prevent better that the bud point direct contact on the bud piece from moist soil and causing the rotten. In addition, a sticky rice grafting belt can be used for covering the bud points. After, for example, about 10 days, the wrapped moist soil is removed along with the glutinous rice graft tape covering the sprout sites. The measure can effectively keep the humidity at the interface, and prevent the death caused by too fast water loss because the bud piece callus is not formed yet. Meanwhile, the temperature at the budding interface can be reduced by the measure, so that the callus is prevented from being difficult to form at high temperature, and the dark environment at the interface is more favorable for the formation of the callus.

The post-grafting management can adopt a common management method. For example, the shoots growing from the rootstock can be removed at any time after grafting. The branches grown after grafting can be timely cored, the branch overgrowth is prevented, the grafting points are split, and the formation of a large number of auxiliary tips can be promoted after pinching. After the grafting survives, nitrogen fertilizer can be further applied, irrigation is combined, the root stock and the scion are well healed, and the plant can grow vigorously.

The process of the present invention will now be illustrated with reference to figure 1. Scoring is performed on the overgrown strips (see fig. 1a and 1 b). Then, the spindly shoot was subjected to a branch pulling treatment to germinate the bud point (see fig. 1 c). After the bud has been enlarged, it can be removed (see FIG. 1 d). The removed shoots were grafted onto the rootstocks by inverted T-bud grafting and the gutters were cut (see fig. 1 e). The bud sites were covered with a sticky rice grafting tape after the mouthpiece was wound with the grafting tape (see fig. 1 f). The soil was drenched with carbendazim solution and then wrapped around the mud ring (see fig. 1h and 1i) so that the scion survived and after new shoots developed (see fig. 1 j).

Reference is now made to fig. 2. FIG. 2a shows a vain strip of the sprouting period. Fig. 2b shows inverted T-shaped budding, wherein 1 represents inverted T-shaped cut and b represents draft groove. FIG. 2c shows the bud covered with the sticky rice grafting band. Preventing infection when wrapping the soil. Figure 2d shows the soil drenched with a low concentration carbendazim solution. Figure 2e shows the case of the wrap.

The method can fully utilize the hidden buds on the vain long strips of the malus spectabilis, the grafting survival rate can reach 95 percent, the strips are drawn in the same year, stable flowering and fruiting can be realized in the next year, the method is very suitable for being used when stock mother trees are scarce, and the method has a promoting effect on the rapid grafting and breeding of new excellent new varieties of the malus spectabilis.

Examples

The present invention will be further described with reference to the following examples, which are provided for illustrative purposes only, and the scope of the present invention is not limited to these examples.

Example 1

The embodiment implements a method for the saphenous bud grafting of ornamental malus spectabilis, which is carried out according to the following steps:

(1) selecting rootstocks: selecting 2-3 years old

The seedlings of the malus spectabilis are used as stocks, and the number of the seedlings is 20.

(2) Treatment of bare strip as scion: in the middle ten days of 4 months, strong and spindly strips of 1-2 years are selected from the crab of the Xiu Fei province (Malus Show Time), and buds are carved 2cm above the hidden buds, wherein the length of the carved buds reaches 1/2 of the branch circumference and reaches the xylem deeply. Then, the rope is used for pulling the bare-length strip into a bow shape, and the angle is nearly 90 degrees.

(3) Grafting time: and taking branch pulling measures on the bare-grown strips and taking down 20 hidden buds with carved buds as scions for grafting when the hidden buds sprout (the 4 th day of branch pulling treatment). The specific operation is as follows:

firstly, the branches and leaves 10cm above the root of the Malus spectabilis root of the stock are removed, so that the stem is smooth and convenient for grafting.

Then, a cut is transversely cut at the smooth and scarless part, and the width of the cut is about half of the thickness of the stock. And longitudinally cutting the middle of the transverse knife edge upwards by about 1.5cm, and finally forming an inverted T-shaped interface when the knife is inserted to the depth of the xylem.

Then, bud is taken by a two-knife method at the hidden bud part where the spindly strip sprouts. The first cut is transversely cut at a position 1cm below the bud, the width of the first cut is about half of the thickness of the scion, and the first cut is deep to xylem. Starting from the position 1cm above the second knife bud point, obliquely cutting from top to bottom to the position of the transverse knife, and quickly taking down the shield-shaped bud slice (slightly with a point xylem in order to avoid the injury of the bud body which just buds).

Then, the phloem layers on two sides of the inverted T-shaped cut are opened by a tool tip, the bud slices are inserted, the lower parts of the bud slices are aligned with the inverted T-shaped transverse cut, and then the right lower part of the inverted T-shaped cut is vertically cut downwards to form a guide groove, so that sap can be guided out conveniently in summer when wound flows exist, and callus formation is facilitated.

Finally, the wound is tightly wrapped by a circle of grafting belt from bottom to top, so that the bud slices are tightly attached to the stock, and the bud points and the diversion trenches are exposed.

(4) Wrapping a mud ring: preparing a carbendazim solution with low concentration (1000 times of the carbendazim solution), spraying the carbendazim solution on soil, and preferably, the soil is wet to be held into a mass and loosened immediately. Wrap up the outer round of interface at T type bud grafting with plastic wrap for the moist soil, for preventing that the bud point direct contact moist soil on the bud piece from causing the rotten, use glutinous rice grafting area to cover the bud point. After about 10 days, the wrapped wet soil and the glutinous rice grafting band covering the bud points are removed. The measure can effectively keep the humidity at the interface, and prevent the death caused by too fast water loss because the bud piece callus is not formed yet. Meanwhile, the temperature at the budding interface can be reduced by the measure, so that the callus is prevented from being difficult to form at high temperature, and the dark environment at the interface is more favorable for the formation of the callus. As shown in fig. 3a, the side bar surface temperature was 32.6 ℃ and the temperature inside the wrap was 30.2 ℃.

(5) And (3) management after grafting: after grafting, the shoots growing on the rootstock are removed at any time. And (3) pinching branches growing after grafting in time to prevent the branches from overgrowing, splitting grafting points, and promoting the formation of a large number of auxiliary tips after pinching. After the grafting survives (as shown in fig. 4a, after the wrapping soil is completely removed, the bud points turn green and sprout to indicate survival), nitrogen fertilizer is applied in time, and irrigation is combined, so that the root stock and the scion are well healed, and the plant can grow vigorously. As shown in FIG. 4b, shoots have grown indicating that the budding was successful.

Example 2

The procedure was carried out in substantially the same manner as in example 1, except that the Malus hupehensis Rehd seedling was used as the stock.

Example 3

The procedure was carried out in substantially the same manner as in example 1, except that the grafting was carried out directly using the hidden bud without carrying out the bud carving and branch pulling treatments.

Example 4

This was carried out in substantially the same manner as in example 1 except that no guide groove was provided.

Example 5

This was carried out in substantially the same manner as in example 1, except that the mud ring was not wrapped.

Example 6

Grafting was performed in substantially the same manner as in example 1, except that T-shaped budding (and thus no gutters) was used.

TABLE 1 Cryptomeria bud grafting test data

Treatment of	Number of hidden buds	Survival rate of adultQuantity (number)	Survival rate	Bud sprouting time after grafting (d)
					Example 1	20	19	95％	15
Example 2	20	19	95％	16
					Example 3	20	9	45％	27
Example 4	20	16	80％	15
					Example 5	20	14	70％	17
Example 6	20	15	75％	16

As can be seen from the data in the table:

in the embodiment 1, after the malus spectabilis scion is subjected to hidden bud carving and is re-grafted and a mud ring wrapping measure is adopted, compared with the embodiment 3, the survival rate is improved to 95% from 45%, the average germination time of bud points after grafting survival is shortened by 12 days, and the effect is remarkable. Example 2 the same results were obtained using a Malus hupehensis Rehd seedling as a stock. Example 4 was not provided with a draft groove, although the germination time was the same as example 1 and the survival rate was significantly higher than example 3, but lower than example 1. Compared with the example 3, the survival rate of the malus spectabilis scion hidden buds subjected to bud carving treatment without wrapping mud rings in the example 5 is improved to 70% from 45%, the survival rate is remarkably improved, and the average germination time of bud points after grafting survival is shortened by 10 days. Example 6 grafting was performed by T-bud grafting, and other measures were the same as those of example 1, the germination time was substantially the same, but the survival rate was significantly lower than that of example 1.

In summary, the method can fully utilize the hidden bud on the vain long strip of the malus ornamental crabapple, and the grafting survival rate can even reach more than 95 percent. In addition, the strips can be taken out in the current year, and the flowers can stably bloom and bear fruits in the next year. Therefore, the method is very suitable for being used when the stock tree is scarce, and has promotion effect on the rapid grafting and breeding of new and excellent varieties of the Malus ornamental crabapple.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The method for grafting ornamental malus spectabilis is characterized by comprising the following steps:

2. The method according to claim 1, wherein the rootstock is Malus octangularis (Malus robusta Rehd) rootstock or Malus hupehensis (pamp.) rehe. var. mengshhanensis G.Z.Qian) seedling rootstock; preferably, the rootstock is a rootstock with the seedling age of 2 to 3 years and/or the diameter of the trunk of 2 to 3 cm.

3. The method of claim 1, wherein the inscription is an inscription 0.5 to 1.5cm (e.g., 1cm) above the cryptomeria japonica; preferably, the length of the scored bud is up to one third to two thirds (e.g. one half) of the circumference of the shoot, and the scored bud is deep into the xylem.

4. The method of claim 1, wherein the branch is a bare strip drawn into an arch of 80 to 100 degrees (e.g., 90 degrees) using an angle opener or a rope.

5. The method according to claim 1, wherein the grafting time of the grafting is at or after the sprouting of the bud-carved treated hidden bud on the bare-cut strip.

6. The method according to claim 1, wherein the wet soil is a wet soil obtained after spraying a carbendazim solution on the soil; preferably, the carbendazim solution is 1000 times of carbendazim, and the carbendazim is wettable powder containing 50 wt% of active ingredients; the moist soil is held to be agglomerated and loosened.

7. The method of claim 1, wherein:

the inverted T-shaped interface is formed by the following steps: the branches and leaves in the range of 8-12 cm (for example, 10 cm) above the root of the rootstock are removed; then transversely cutting the part without scars to the xylem to form a transverse cut, wherein the width of the transverse cut is about half of the thickness of the rootstock; longitudinally cutting the middle of the transverse knife edge upwards to the xylem to form a longitudinal cut, wherein the length of the longitudinal cut is 1 cm-2 cm (for example, 1.5 cm); thereby forming an inverted "T" interface; and/or

Taking down the germinated hidden buds in the following way: taking buds at the hidden buds where the spindly strips sprout by adopting a two-knife method, wherein a first knife transversely cuts at a position 1cm below the buds (the width is about half of the thickness of a scion for example) to the xylem, a second knife obliquely cuts from top to bottom to the transverse cut position from 1cm to 2cm above the bud points, and then a shield-shaped bud slice is taken down; preferably, the shield-shaped sheeting has a wood part.

8. The method according to claim 1, wherein said grafting is performed by: the phloem layers on the two sides of the inverted T-shaped incision are opened, the bud slices are inserted, and the lower parts of the bud slices are aligned with the inverted T-shaped transverse incision.

9. The method of claim 1, wherein the flow guide groove is vertically cut at the lower right or lower left of the inverted "T" shaped joint.

10. The method as claimed in claim 8, wherein the wound is wound by using the grafting band from bottom to top so as to make the bud sheet and the stock fit and keep the bud point and/or the diversion trench exposed.