CN109983934A - A kind of method of walnut grafting breeding - Google Patents

Abstract

The present invention provides a kind of method of walnut grafting breeding comprising step: (1) 1 month site preparation before transplanting rootstock seedling, according to plant 20 ~ 25 plants of production kind plant holes per acre；(2) selection 1.2 ~ 3cm of ground diameter seedling makees rootstock seedling；(3) before 2 ~ March of second year or rootstock seedling rudiment, raw scion in 1 year is selected；(4) walnut is grafted according to the stock of selection, scion；(5) it carries out removing after grafting and sprouts, lightens restrictions on, and carry out loosen the soil fertilising, pruning and the prevention and control of plant diseases, pest control.The method of the present invention selection walnut seedling is transplanted nearby, the grafting method for taking simple bud cut-grafting, bud to connect, and combination applies fertilizers scientifically, irrigation, treelet pruning, prevention and control of plant diseases, pest control etc. integrate pipe irrigation project in due course, it can effectively promote the grafting breeding speed of growth, improve survival rate, it is further ensured that breeding seedling-wood breeding quality and Walnut Fruit quality, reduces cost of forestation.

Description

A kind of method of walnut grafting breeding

Technical field

The present invention relates to fruit trees and field of forest cultivation technology, and in particular to a kind of method of walnut grafting breeding.

Technical background

Walnut is listed in first of the big dry fruit in the world four with its nutrition, unique flavor and plurality of health care functions abundant, good Kind walnut is because yield is high, quality is excellent, the deep welcome by plantation peasant household and the masses.

Cangxi County is located in Sichuan Basin the northern fringe low mountain depth hilly area, and cultivation walnut has a long history.The existing walnut in the whole county Area 4960hm2 produces walnut 5700t per year.And with the continuous rising of walnut market conditions, walnut, which has become, more importantly to be produced Industry developing direction.Currently, being suitable for the high-quality Walnut Cultivars locally grown to cultivate, farmer often blindly introduces from other places Scion and grafting, through transporting for long-distance, scion, nursery stock can a large amount of dehydrations, would potentially result in walnut using existing grafting and transfer The survival rate that connects and transplant reduces, while seedling selection and grafting method is inappropriate, will also result in walnut graft survival rate It is low, and it is irregular to be easy to appear walnut growth, the problems such as solid evening, low output, nut quality is inconsistent, is unfavorable for walnut Plantation breeding and economic development.

Summary of the invention

To solve the problems such as low using existing grafting method walnut survival rate, the present invention provides a kind of walnut grafting breeding Method, this method comprises the following steps:

(1) 1 month site preparation before transplanting rootstock seedling, according to 20~25 plants of production kind plant hole is planted per acre, what is during which generated is ripe Soil, the raw-soil are placed respectively, are mixed base fertilizer and mellow soil in filling kind plant hole when plant, then will mellow soil filling plantation around kind plant hole 28~32cm on cave to ground；

(2) selection 1.2~3cm of ground diameter seedling makees rootstock seedling, and the rootstock seedling is to plant 11~December of First Year It plants, root water is poured after plant, earthing builds Cheng Shupan, is grown up with film overlay tree disk thereafter；

(3) before 2~March of second year or rootstock seedling rudiment, raw scion in 1 year, the scion thickness and rootstock seedling are selected Thickness is suitable at graft union, takes long 3~5cm thereafter, containing the scionwood section for enriching full bud, bud eye away from branch section top 0.5~ 1cm；

(4) walnut is grafted according to the stock of selection, scion；

(5) it carries out removing after grafting and sprouts, lightens restrictions on, and carry out loosen the soil fertilising, pruning and the prevention and control of plant diseases, pest control.

Further, a kind of method of walnut grafting breeding of the present invention comprising step:

A. plantation measures and clear woods；

B. site preparation before transplanting: 1 month progress site preparation before transplanting rootstock seedling plays nest formation kind according to planting 20~25 plants per acre Plant hole, the mellow soil generated therebetween, the raw-soil are placed respectively, under base fertilizer and mellow soil being uniformly mixed in filling kind plant hole when plant Portion will plant thereafter mellow soil around plant hole and insert 28~32cm on planting hole to ground；

C. Root-stock selection and plantation: selecting local nursery ground diameter 1.2~3cm seedling to make rootstock seedling, by rootstock seedling in the 1 year 11~December was transplanted, and root water is watered with after plant, and earthing is built Cheng Shupan, covered with agricultural film thereafter；

D. scion selection and grafting: raw scion in 1 year of selection fringe bud robust growth, abundant lignifying, no disease and pests harm, it is described Scion thickness is identical as rootstock seedling thickness, and long 3~5cm retains 1 bud as bud point, sprouts 2~March of second year or rootstock seedling Before bud, scion is whittled by shape using simple bud cut-grafting method and is close to erect notch in stock, then the plastic film more flexible with quality Bundled fixed simultaneously exposes scion bud point, thereafter 5~June of the same year, scion is cut out bud tablets using bud grafting method, thereafter by bud Piece is pasted into stock interface, fits closely both bud tablets and stock forming layer, is bound with the more flexible plastic film strip of quality , obtain grafting；

E. manage after connecing: in time except sprouting and lighten restrictions on after grafting, and periodically carry out loosening the soil fertilising, pruning and pest and disease damage are anti- It controls.

As another specific embodiment, the simple bud cut-grafting method be in grafting first 12 hours in rootstock seedling rhizosphere subordinate The wide about 1-2mm of 1-2 item, the gutter channel as deep as xylem are drawn, bleeding sap is excluded.Use scissors from stock seedling stem away from ground thereafter Upper end is clipped at 10-20cm or 1m and is cut into micro- cross section inclined.Section lower edge be intended to the straight place of the place's of connecing selection it is perpendicular cut with The forming layer of the smooth kerf of the comparable width of scion rugosity and 3~4cm of length simultaneously retains tender cortex, while smoothly cutting in stock Long 3~5cm the indentation of one knife of drop-down excludes bleeding to xylem on the right of mouthful.Then in the scionwood section with scion fringe bud the same side Bottom end is in 45 ° of length 1.5cm smoothly short bevels of splaying, then in the xylem straight lower than the opposite side band at fringe bud 1~2mm of root A perpendicular long 3~5cm, the width cut less than or equal to the long bevel of straight forming layer of the perpendicular notch of stock, erect bevel and omit by scion opposite side It is longer than stock and erects 1~2mm of bevel.Long 3~the 5cm of bevel of the forming layer for the scion cut (cannot cut xylem) is slightly exerted oneself It is disposably gently attached in the cortex of stock and no longer moves, fit closely both scion and stock forming layer, then stock Tender cortex tightly applies on the cortex of scion, finally scion and makes to connect with the more flexible plastic film strip bundled fixed of quality, closing Fringe bud point is exposed.When with film tape bundled fixed, closing scion, one one can also be placed vertically it is pressed in film inner layer one and be exposed at Long 5cm, the thin waddy of diameter 3mm (toothpick etc.) outside film, bleeding is excluded.

In a specific embodiment of the invention, the rootstock seedling kind is selected from hickory nut or/and rice walnut；Further , the hickory nut is selected from white bar hickory nut or/and green bar hickory nut, preferably green bar hickory nut.

In a specific embodiment of the invention, the scion is selected from delicate fragrance walnut, large core peach or distant core 4, preferably For Liaoning 4.

In a specific embodiment of the invention, the method grafted in the step (4) be selected from cut-grafting, whip graft, cortex grafting or Cleft grafting, preferably cut-grafting, further preferably simple bud cut-grafting.

In the present invention, the grafting type includes seedling grafting, 1 year raw live streaming seedling is grafted with sitting, 2 years raw transplanted seedlings are transferred It connects, grafting high and changing head grafting, raw transplanted seedling grafting in preferably 2 years.

As another specific embodiment, the plantation measures and clear woods are the leeward slopes that faces south and can irrigate of selection Ground, wherein the soil in the hillside fields be neutral purple soil, soil soil thickness >=80cm, thereafter remove planting site in weeds, Shrub and stone, and build gutter.

As another specific embodiment, step (1) nest of beating forms the specification of kind of plant hole as 80 × 80 × 60cm.

As another specific embodiment, step (1) described base fertilizer includes decomposed 12~18kg of organic fertilizer and quick lime 0.3~0.8kg.

As another specific embodiment, in the step (2) plant be according to three bury two step on one propose seedling plant when it is necessary Nursery stock place rectify, guarantee seedling just, root relax, layering earth backing, compacting, so that root system combined closely, contacted with soil, the depth of planting Generally it is advisable with being higher by nursery stock rootstock original place trace 3-5cm or so.10~20cm of root first is buried with wet surface soil fine earth when banketing, It is advisable with covering its most of imaginary root, is then slightly compacted with foot, then proceedes to bury second layer surface soil 10~20cm of fine earth, simultaneously The edge surrounding 5cm soil layer is slightly firmly tapped with waddy one end, root system is allowed to and combines closely, contacts with soil.It is extremely transplanted when burying soil When acupoint depth 2/3 or so, nursery stock is slightly upwardly mentioned, keeps seedling root smooth, then steady and sure, last covered one layer is loosened the soil, and reaches " three Bury two and step on one and mention seedling " technical requirements transplanted.

As another specific embodiment, the earthing, which builds Cheng Shupan, to be built fine earth at watering into inner low outer high shape Disk is set, the tree disk diameter is 0.8~1.2m, and disk height and ground distance are 15~20cm, and the fine earth is fine earth particle Maximum particle diameter is less than 9.5mm, and wherein the granular mass content less than 2.36mm is no less than 90%.

As another specific embodiment, step (5) fertilising of loosening the soil is to apply urea 100 for every plant before grafting rudiment 1 urea is applied when~150g, young sprout 15~20cm of length, combines pinching to apply 1 urea again thereafter, imposes within 2~3 months after pinching Phosphorus potash fertilizer, fertilising combines progress of loosening the soil and water every time.

As another specific embodiment, step (5) described pruning was trimmed in grafting dormant period, specifically It is using cutting back and to remove method.

Juglans regia trees have very strong apical dominance, few to trim, and length puts extension branch.First fruiting period adjusts in time, it then follows " long shoot Slow to put, side shoot stays more " principle, it is dry to treelet center in time using twisting branch epidermis, pinching, remove the modes such as terminal bud, prevent Only excessive growth balances tree vigo(u)r, utilizes auxiliary support branch result.Cutting back processing is done to too long major branch, promotes branch.Cutting back: annual development Branch can suitably carry out in, slight cutting back, cut off a part of annual shoot.Meanwhile contracting can be carried out to perennial branch and cut, cutting back The nutrition branch of excessive growth, retraction vertical branch.It is chiefly to facilitate and newly slightly grows, increase branch, to inspire healthy and strong bearing basal shoot, change clip The apical dominance of bud.Sparse branching: branch is wiped out from base portion, is removed object and is mainly crossing branch, is overlapped branch, sick branch, withered branch, Male flower branch and overstocked branch.

Experiments have shown that: the rice walnut seedling using the local ground diameter 2cm transplanted or so makees walnut stock, not only survives Rate is obviously improved, and can obtain the product of uniform quality, and the more late-maturing walnut of fruiting period shifts to an earlier date 2-3, overcomes simultaneously Early real kind resistance difference and the relatively low disadvantage of evening real variety yield, but the kind enters high yield period a little later.Spring scion grafting, connects Fringe growth and development stage is long compared with the summer budding phase, can the original walnut graft character of effective guarantee stablize, improve resistance, promote growth Development.

Alternatively embodiment, bud grafting method, which specifically operates, is: being attached to rootstock seedling section using box-shaped guided mode tool Between long and straight smooth place, thereafter along above and below guided mode tool architrave and two sides cutting-up draws stripper wire, as deep as xylem, stripper wire After cutting, one jiao of stock cortex is levered up, forms stock interface, and pull down the long 3~5cm indentation of a knife in the stock interface lower right corner To xylem, or one one is placed vertically in bundled fixed scion and is pressed in film inner layer one long 5cm, the diameter being exposed at outside film Bleeding is excluded and (is used when binding scion with film tape) by the thin waddy of 3mm (toothpick etc.).Thereafter it is attached to using box-shaped guided mode tool In scion, stripper wire is drawn by the same manner cutting-up, after stripper wire is cut, the two sides of scion cortex is all levered up and is removed, are obtained To complete bud tablets, bud tablets is slightly firmly pasted into stock interface rapidly no longer moves thereafter, bound with film tape；Pay attention to It not allow the bud tablets section removed to touch other objects or rub back and forth on stock, avoid damage to forming layer, Yao Yici puts standard, It compresses.

Compared with prior art, the present invention program have the utility model has the advantages that

(1) the method for the present invention makees rootstock seedling using the locality high-quality seedling of nursery ground diameter 2cm, can effectively promote grafting Seedling breeds the speed of growth, and the surrival rate of afforestation is high, reduces cost of forestation；

(2) the method for the present invention using grow directly from seeds Juglans afforestation after grafted again, especially successively carry out simple bud cut-grafting and Bud connects, and is conducive to keep kind pure, improves survival rate, improves breeding seedling-wood breeding quality；

(3) the Walnut Fruit quality that grafting obtained by the method for the present invention is formed is preferable, and result is more, no biennial bearing phenomenon, It is not easy early ageing；

(4) the method for the present invention can be significantly expanded the suitable cultivation range of walnut, and gained grafting has preferable disease resistance, drought-enduring Property, barren-resistant property, and proved by the cultivation practices in Sichuan Cangxi and surrounding area, which shows good degeneration-resistant Property, yielding ability and stability.

Specific embodiment

The present invention is described in further detail below by specific embodiment and comparative example, but those skilled in the art Member will be understood that the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not infused in embodiment Bright actual conditions person, carries out according to conventional conditions or manufacturer's recommended conditions.Production firm is not specified in fertilizer or tool used Person is the conventional products that can be obtained by commercially available purchase.

It should be noted that the " comprising " in the technical program mean its in addition to the ingredient, can also include other at Point, the " comprising ", may be replaced by enclosed " for " or " by ... form ".

A kind of method of walnut grafting breeding of the present embodiment comprising step:

(1) plantation measures and clear woods: the leeward hillside fields that faces south and can irrigate of selection, wherein the soil in the hillside fields is Neutral purple soil, soil soil thickness >=80cm, thereafter with clearing in thorn grass, shrub and stone, and build along growing area surrounding Build gutter, more particularly, withe, leaf in growing area, weeds cover earth's surface on the spot, when site preparation turn over it is buried under to mention The high soil organism was completed before First Year late October；

(2) site preparation before transplanting: January carries out site preparation before transplanting rootstock seedling, according to 20~25 plants or 5m × 6m plants of plant per acre Line-spacing fixed point beats nest and forms kind of a plant hole, and for kind plant hole in bulk, specification is 80 × 80 × 60cm, the mellow soil generated therebetween, the raw-soil It places respectively, when carrying out backfill when formally transplant, base fertilizer and mellow soil is uniformly mixed to the middle and lower part of filling planting hole, thereafter will The raw-soil smashes 30cm on thin filling planting hole to ground, and more particularly, base fertilizer applies decomposed organic fertilizer 15kg, raw stone according to every cave Grey 0.5kg is mixed with mellow soil, loss that the above process can effectively avoid turning over loosen the soil and causes the excessive dehydration of kind of plant hole；

(3) Root-stock selection and plantation: the selection locality high-quality seedling of nursery ground diameter 2cm makees rootstock seedling, by rootstock seedling in the 1 year 11~December was transplanted, and the method for planting specifically uses three to bury two and steps on a method for mentioning seedling, and the depth of planting is with height Nursery stock rootstock original soil trace depth 3-5cm is advisable out, and first root, rotten and too long main side root are hurt in trimming before plant, after transplanting It is watered with root water, one layer of fine earth is filled out again after water infiltration is lower, builds into inner low outer high diameter 1m tree disk, disk up to ground 15cm or more, Thereafter it is covered using 1m × 1m square agricultural film；

(4) scion selection and grafting: the life in 1 year on selection high and stable yield, the elite stand that high-quality, resistance is strong, character is excellent And robust growth, logical straight, bud enrich that full, medulla is smaller, abundant lignifying, no disease and pests harm, without freeze injury, the spring having no mechanical damage The fresh branch of tip branch, nutrition branch does scion (best current use).Disabling behind bud does clip bud.Meanwhile scion rugosity less times greater than Stock rugosity, rugosity 1-2cm are preferred.It is required that with wooden, if medulla is more than that 30% should not use.Growing season nodal bud connects and spray It connects and scion is done using current year raw young sprout, it is desirable that scion is the higher developmental branch of degree of lignification, and excessively tender young sprout is unsuitable Do scion.

The scion thickness is identical as rootstock seedling thickness, and long 3~5cm retains 1 bud as bud point, in second year 2~3 Before the moon or rootstock seedling rudiment, scion is whittled by shape using simple bud cut-grafting method and is inserted into stock notch, both scion and stock are made Forming layer fits closely, and with film tape bundled fixed and exposes scion bud point, thereafter 5~June of the same year, using bud grafting method Scion is cut out into bud tablets, bud tablets are pasted into stock interface thereafter, both bud tablets and stock forming layer is fitted closely, uses quality More flexible plastic film strip binding, obtains grafting；

Wherein, simple bud cut-grafting method, which specifically operates, is: in wide in rootstock seedling rhizosphere subordinate drawing 1-2 item in grafting first 12 hours About 1-2mm, the gutter channel as deep as xylem, bleeding sap is excluded.Use scissors from stock seedling stem away from ground 10-20cm or 1m thereafter Upper end is clipped and is cut into micro- cross section inclined in place.Section lower edge be intended to the straight place of the place's of connecing selection it is perpendicular cut it is suitable with scion rugosity 3~4cm of width and length smooth kerf forming layer and retain tender cortex, while pulling down one on the right of stock smooth kerf Long 3~5cm the indentation of knife excludes bleeding to xylem.Then oblique in 45 ° with the scionwood section bottom end of scion fringe bud the same side Cut length 1.5cm smoothly short bevel, then the xylem straight lower than the opposite side band at the place fringe bud 1~2mm of root it is perpendicular cut one grow 3~ 5cm, width are less than or equal to the long bevel of straight forming layer that stock erects notch, and scion opposite side erects bevel and is slightly longer than that stock is perpendicular to be cut 1~2mm of face.Long 3~the 5cm of bevel of the forming layer for the scion cut (cannot cut xylem) is slightly firmly disposably gently attached to It in the cortex of stock and no longer moves, fits closely both scion and stock forming layer, then the tender cortex of stock is tightly applied On the cortex of scion, finally with the more flexible plastic film strip bundled fixed of quality, close scion and make scion bud point expose.? With film bundled fixed, closing scion when, can also place vertically one one be pressed in the film inner layer one long 5cm being exposed at outside film, The thin waddy of diameter 3mm (toothpick etc.), bleeding is excluded.

(5) managed after connecing: after grafting 15 days in time except sprouting, when spike length waiting arrives 30cm, give grafting release film immediately Item uses bamboo and wood rod handrail when necessary, fractures split at spray or grafting to prevent strong wind, and the fertilising that periodically carries out loosening the soil, shaping are repaired It cuts and the prevention and control of plant diseases, pest control；

Wherein, the concrete operations of fertilising of loosening the soil are: applying 100~150g of urea for every plant before grafting rudiment, young sprout is long 1 urea is applied when 15~20cm, is combined pinching to apply 1 urea again thereafter, is imposed a phosphorus potash fertilizer within 2~3 months after pinching, every time Fertilising combines progress of loosening the soil and water；

The concrete operations of pruning are: being trimmed in grafting dormant period, in the garden of seeding row spacing 5m × 6m, to cultivate Based on natural open centre shape, trimming be specifically using cutting back and remove method, and to current year long shoot will pinching, centering brachyplast do not pluck The heart, the process can promote branch mature, lateral bud promoted to form bud, and treelet precocity fruiting is promoted early to get bumper crops.

Following experiment is carried out using the walnut grafting mating system of the present embodiment.

The influence that experiment one, different Stockscion combinations and engrafting method survive walnut grafting

The graft survival rate (%) of different stock varieties

Different grafting methods survival rate (%)

Experimental field	Cut-grafting	Whip graft	Cortex grafting	Cleft grafting
					The town Ling Jiang return water village	89	75	82	70
The white bridge dam in the town Bai Qiao	95	78	80	69
					Longshan Town Nanyang village	92	73	75	63

The survival rate (%) of difference grafting type

The engrafting method of above-mentioned different grafting types is all made of cut-grafting method.

The grafting high and changing head graft stock selects raw seedling grafting in 5~10 years.

Delicate fragrance walnut is typical male antetype kind, and general female antetype kind can all arrange in pairs or groups plant with it, such as large star, river Morning, Liaoning 4 etc..Walnut stock is made using the rice walnut seedling of the local ground diameter 2cm transplanted or so and carries out cut-grafting, not only Survival rate is obviously improved, and can obtain the product of uniform quality, and the more late-maturing walnut of fruiting period shifts to an earlier date 2-3, simultaneously The early real kind resistance difference disadvantage relatively low with evening real variety yield is overcome, but the kind enters high yield period a little later.Spring branch Connect, scion growth and development stage is long compared with the summer budding phase, can the original walnut graft character of effective guarantee stablize, improve resistance, promote Into growth and development.

The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of method of walnut grafting breeding, which is characterized in that this method comprises the following steps:

(1) 1 month site preparation before transplanting rootstock seedling, according to plant 20 ~ 25 plants of production kind plant holes per acre, the mellow soil during which generated, life Soil is placed respectively, is again mixed base fertilizer and mellow soil in filling kind plant hole when plant, finally will mellow soil filling plantation around kind plant hole 28 ~ 32cm on cave to ground；

(2) selection 1.2 ~ 3cm of ground diameter seedling makees rootstock seedling, and the rootstock seedling is to transplant 11 ~ December of First Year, plant After pour root water, earthing builds Cheng Shupan, is grown up with film overlay tree disk thereafter；

(3) before 2 ~ March of second year or rootstock seedling rudiment, raw scion in 1 year, the scion thickness and rootstock seedling graft union are selected It is suitable to locate thickness, takes long 3 ~ 5cm thereafter, containing the scionwood section for enriching full bud, bud eye is away from branch section 0.5~1cm of top；

(4) walnut is grafted according to the stock of selection, scion；

(5) it carries out removing after grafting and sprouts, lightens restrictions on, and carry out loosen the soil fertilising, pruning and the prevention and control of plant diseases, pest control.

2. the method for walnut grafting breeding as described in claim 1, which is characterized in that the rootstock seedling kind is selected from hickory nut Or/and rice walnut；Further, the hickory nut is selected from white bar hickory nut or/and green bar hickory nut, preferably green bar mountain core Peach.

3. the method for walnut grafting as described in claim 1 breeding, which is characterized in that the scion is selected from delicate fragrance walnut, large Core peach or distant core 4, preferably Liaoning 4.

4. the method for walnut grafting breeding as described in claim 1, which is characterized in that the method grafted in the step (4) Selected from cut-grafting, whip graft, cortex grafting or cleft grafting, preferably cut-grafting, further preferably simple bud cut-grafting.

5. the method for walnut grafting breeding as described in claim 1, which is characterized in that the grafting type includes that sub- seedling is transferred It connects, 1 year raw live streaming seedling is grafted with sitting, raw transplanted seedling grafting, grafting high and changing head grafting in 2 years, raw transplanted seedling grafting in preferably 2 years.

6. the method for walnut grafting breeding as described in claim 1, which is characterized in that the method also includes plantation measures And clear woods is the leeward hillside fields that faces south and can irrigate of selection, wherein the soil in the hillside fields is neutral purple soil, soil soil layer Thickness >=80cm removes thereafter weeds, shrub and stone in planting site, and builds gutter.

7. the method for walnut grafting breeding as described in claim 1, which is characterized in that the specification of step (1) described kind of plant hole For 80 × 80 × 60cm；Step (1) described base fertilizer includes decomposed 0.3 ~ 0.8kg of 12 ~ 18kg of organic fertilizer and quick lime.

8. the method for walnut grafting breeding as described in claim 1, which is characterized in that it is by fine earth that the earthing, which builds Cheng Shupan, Build the tree disk at inner low outer high shape at watering, the tree disk diameter is 0.8 ~ 1.2m, disk height and ground distance for 15 ~ 20cm, the fine earth are that the maximum particle diameter of fine earth particle is less than 9.5mm, and the granular mass content for being wherein less than 2.36mm is many In 90%.

9. the method for walnut grafting as described in claim 1 breeding, which is characterized in that step (5) fertilising of loosening the soil be Urea is applied before grafting rudiment, Shi Yici urea when young sprout grows 15 ~ 20cm combines thereafter pinching Shi Yici urea again, pinching A phosphorus potash fertilizer is imposed within 2 ~ 3 months afterwards, fertilising is combined and is loosened the soil and water progresss every time, and each dose applies fertilizer 100 for every plant ~ 150g。

10. the method for walnut grafting as described in claim 1 breeding, which is characterized in that step (5) described pruning be in Grafting dormant period is trimmed, and is specifically used cutting back and is removed method.