CN113133371A - Culture method of greening big seedlings of hackberry - Google Patents
Culture method of greening big seedlings of hackberry Download PDFInfo
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- CN113133371A CN113133371A CN202010052123.5A CN202010052123A CN113133371A CN 113133371 A CN113133371 A CN 113133371A CN 202010052123 A CN202010052123 A CN 202010052123A CN 113133371 A CN113133371 A CN 113133371A
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- 235000018962 Celtis occidentalis Nutrition 0.000 title claims abstract description 38
- 238000012136 culture method Methods 0.000 title abstract description 4
- 240000008444 Celtis occidentalis Species 0.000 title 1
- 241000723420 Celtis Species 0.000 claims abstract description 39
- 241000196324 Embryophyta Species 0.000 claims abstract description 21
- 229930192334 Auxin Natural products 0.000 claims abstract description 14
- 239000002363 auxin Substances 0.000 claims abstract description 14
- SEOVTRFCIGRIMH-UHFFFAOYSA-N indole-3-acetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CNC2=C1 SEOVTRFCIGRIMH-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000005059 dormancy Effects 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 14
- 238000013138 pruning Methods 0.000 claims description 11
- 238000009966 trimming Methods 0.000 claims description 11
- 238000012258 culturing Methods 0.000 claims description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 8
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 8
- 241001330002 Bambuseae Species 0.000 claims description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- 239000011425 bamboo Substances 0.000 claims description 8
- 239000004202 carbamide Substances 0.000 claims description 8
- 210000003608 fece Anatomy 0.000 claims description 8
- 239000010871 livestock manure Substances 0.000 claims description 8
- 238000005507 spraying Methods 0.000 claims description 8
- 238000012364 cultivation method Methods 0.000 claims description 2
- 241001571485 Vincetoxicum mongolicum Species 0.000 claims 3
- 239000003337 fertilizer Substances 0.000 abstract description 4
- 241000422846 Sequoiadendron giganteum Species 0.000 abstract description 3
- 241000218378 Magnolia Species 0.000 abstract 1
- 239000004744 fabric Substances 0.000 description 4
- 239000002985 plastic film Substances 0.000 description 4
- 229920006255 plastic film Polymers 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 240000007030 Celtis sinensis Species 0.000 description 3
- 210000005069 ears Anatomy 0.000 description 3
- 235000015289 Celtis sinensis Nutrition 0.000 description 2
- 241001673966 Magnolia officinalis Species 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 241000167854 Bourreria succulenta Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 235000014653 Carica parviflora Nutrition 0.000 description 1
- 240000004957 Castanea mollissima Species 0.000 description 1
- 241000837855 Celtis biondii Species 0.000 description 1
- 241001296632 Celtis julianae Species 0.000 description 1
- 241001518970 Celtis koraiensis Species 0.000 description 1
- 241001569193 Celtis philippensis Species 0.000 description 1
- 241000730316 Celtis timorensis Species 0.000 description 1
- 241001091396 Celtis vandervoetiana Species 0.000 description 1
- 241001211722 Chelonopsis chekiangensis Species 0.000 description 1
- 241000243321 Cnidaria Species 0.000 description 1
- 102000018997 Growth Hormone Human genes 0.000 description 1
- 108010051696 Growth Hormone Proteins 0.000 description 1
- 241000219071 Malvaceae Species 0.000 description 1
- 235000003417 Plumeria rubra f acutifolia Nutrition 0.000 description 1
- 244000040691 Plumeria rubra f. acutifolia Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 235000019693 cherries Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013401 experimental design Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000122 growth hormone Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 230000035764 nutrition Effects 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G17/00—Cultivation of hops, vines, fruit trees, or like trees
- A01G17/005—Cultivation methods
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C21/00—Methods of fertilising, sowing or planting
- A01C21/005—Following a specific plan, e.g. pattern
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G2/00—Vegetative propagation
- A01G2/30—Grafting
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Botany (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Forests & Forestry (AREA)
- Soil Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Developmental Biology & Embryology (AREA)
- Cultivation Of Plants (AREA)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
Abstract
The invention discloses a culture method of a drooping hackberry greening big seedling in the field of hackberry seedling culture, and solves the problems of small plant, lack of trunk, small crown and no hierarchy of the current drooping greening seedling. The scion is a tree with obvious twig drapability characteristics and is a scion-picking stock tree, the stock is a single-stem hackberry with large specification, the high-position grafting is carried out, the trunk is bound by using an auxiliary object, the trunk and the culture level are raised year by year, auxin is sprayed on the tree body after lateral branches are pruned each time, and sufficient fertilizer is applied in the growing season and the dormant season; the scheme can cultivate the drooping branch magnolia seedlings with obvious trunk, tall and big tree form, elegant twigs, full crown shape and short seedling period.
Description
Culture method of greening big seedlings of hackberry
Technical Field
The invention belongs to the field of cultivation of magnolia officinalis seedlings, and particularly relates to a cultivation method of a greening big seedling of a hackberry.
Background
The hackberry plants are 60 kinds of plants all over the world and are widely distributed in tropical and temperate regions all over the world. I have purple bullet picture: (I)Celtisbiondii) And black bombax tree (C.bungeana) Xiaoguobao (C.cerasifera) Tianmu hackberry (C.chekiangensis) Coral pad (C.julianae) Diaphorous Magnolia officinalis (C.koraiensis) Philippine hackberry (C.philippensis) Hackberry (C.sinensis) And (C) Siyuanpu.tetrandra) And pseudo-cinnamon (C.timorensis) Xichuanpo (C.vandervoetiana) 11 and 2 varieties, in the area of south China, Liaodong peninsula. The bark fiber can be used for making ropes and woven bags instead of hemp, or used as a paper making raw material, and most kinds of seed oil can be used for making soap or lubricant oil; the hackberry has the advantages of simple tree form, strong adaptability, strong stress resistance, high transplanting survival rate in garden construction and the like, and is widely applied to landscaping. The drooping hackberry refers to a hackberry with a branch naturally drooping or obliquely drooping and a special shape, the garden trees with special ornamental value are popular with the improvement of the aesthetic level of people, the drooping hackberry seeds of small trees such as drooping cherry blossom, drooping plum, drooping pagoda tree and the like are supplied in the market at present, and the drooping greening nursery stock of the tall tree type such as the drooping hackberry is not supplied.
The invention selects the seedling hackberry with the weeping branch character as the scion stock tree and the large-sized hackberry seedling as the stock to carry out high grafting, and combines a novel crown type culture technology to realize the effects of obvious trunk, tall and big tree shape, elegant twigs, full crown shape and short seedling period of the weeping hackberry; the invention can solve the problems of unobvious trunk, short plant, small crown, long seedling time and the like of the common drooping branch tree, and provides a new reference for the culture technology of greening big seedlings of drooping branch hackberry.
Disclosure of Invention
Aiming at the problems of small plants and small crowns commonly existing in the current drooping branches, a large number of field tests are carried out, and through research and summary on aspects such as selection of stocks and scion branches, culture of main branches after grafting, trimming and culturing of side branches, water and fertilizer management and the like, a method for culturing the drooping branches with obvious main branches, tall and big tree forms, elegant twigs, round and round crowns and short seedling culture period is finally obtained.
The invention is realized by the following technical steps:
(1) selecting a scion;
(2) selecting and grafting rootstocks;
(3) culturing the main trunk and the lateral branches after grafting;
(4) spraying growth hormone;
(5) and (5) managing water and fertilizer.
Wherein, the scion in the step (1) is obtained by observing and recording for many years, selecting a tree with obvious small branch verticality characteristic as a scion mother tree, picking after the fallen leaves of the hackberry enter the dormancy stage in 1-2 months every year, collecting the current-year branches with the thickness of 0.5-1.0cm, and pruning to 50-100cm
Binding every 50-100 pieces, wax sealing two ends of the ear, wrapping with wet cloth, wrapping with plastic film, and storing in a refrigerator at 1-5 deg.C.
Selecting a single-stem hackberry with the diameter of 3-5cm from the stock in the step (2), carrying out high-position grafting by horizontally cutting at the position of 2-2.8m, and grafting 2-4 scions by selecting different positions in a bark-cutting grafting manner.
Step (3) inserting a bamboo pole with the height larger than 3-5m into the root of the tree when the scion sprouts to 50-70cm, selecting a branch with a larger upward growth tendency as a trunk to bind and guide the branch to grow upwards, trimming other sprouts, removing excessive dense sprouts, keeping the branch density uniform, simultaneously cutting over the scion with the length of more than 50cm to promote more sprouts, and culturing a first layer of vertical branch crowns; in the dormancy season of the second year, flat shearing is carried out at the position of 50-150cm of the trunk, when the branch growing out of the trunk extends to more than 50cm, one branch with a larger upward growth tendency is selected as the trunk to be bound to guide the trunk to grow upwards, other sprouting branches are trimmed at the same time, excessive and dense sprouting branches are removed, the density of the branches is kept uniform, scions exceeding 50cm are simultaneously cut short to promote more sprouting branches, and the second layer of crown of the drooping branches is cultured; in spring of the third year, flat shearing is carried out at the position of 50-150cm of the trunk of the second layer, when the branch growing out of the trunk extends to more than 50cm, one branch with a larger upward growth tendency is selected as the trunk to be bound to guide the upward growth of the branch, other sprouts are trimmed at the same time, excessive dense sprouts are removed, the density of branches is kept uniform, scions exceeding 50cm are simultaneously cut short to promote more sprouts, and the culture of a third layer of drooping branch crowns is carried out; after 3 years of culture, the drooping big seedlings of the hackberry with the plant height of more than 3.5m to 7.3m can be obtained.
Spraying auxin: and (3) spraying auxin to the tree body after each pruning, wherein the concentration is 500mg/L-1000 mg/L, so that the branches are promoted to grow in an extending way, and softer and more elegant drooping twigs are cultured.
Step (5) applying 1kg-3kg of urea to each plant every month in the vigorous growth season of 5-7 months; 5kg to 10kg of decomposed farmyard manure is applied in the dormant period.
Further, selecting a single-stem hackberry with the diameter of 4-5cm for the stock, carrying out high-position grafting by horizontally cutting at the position of 2.4-2.8m, and grafting 3-4 scions by selecting different positions in a bark-inserting grafting manner; when the scion sprouts to 60-70cm, inserting a bamboo rod with the height larger than 3-5m into the root of the tree, selecting a branch with a larger upward growth tendency as a main trunk to bind to guide the upward growth of the branch, simultaneously trimming other sprouts, thinning excessive dense sprouts, simultaneously cutting over the scion with the height larger than 60cm, and culturing a first layer of pendulous branch crown; in the dormancy season of the second year, performing horizontal shearing at the position of 100-150cm of the newly cultured trunk, in the dormancy season of the third year, performing horizontal shearing at the position of 100-150cm of the newly cultured trunk, and simultaneously performing culture of the second layer and the third layer of the drooping crowns according to the same method; spraying auxin after each pruning, wherein the concentration is 800mg/L-1000 mg/L; applying 2kg-3kg of urea to each plant every month in the vigorous growth season of 6-7 months; applying 8kg-10kg of decomposed farmyard manure to each plant in the dormancy stage of 12 months to 1 month in the next year.
Further, the stock is a single-stem hackberry with the diameter of 4cm, the high position grafting is carried out by horizontally cutting at the position of 2.4m, and 3 scions are grafted by selecting different positions in a bark grafting way; when the scion wood sprouts to 60cm, inserting a bamboo pole with the height larger than 3-5m into the root of the tree, selecting a branch with a larger upward growth tendency as a trunk to bind to guide the upward growth of the branch, simultaneously trimming other sprouts, removing excessive dense sprouts, simultaneously cutting the scion wood exceeding 60cm, and culturing a first layer of pendulous branch crowns; in the dormancy season of the second year, horizontally cutting the newly-cultured trunk at a position of 100cm, in the dormancy season of the third year, horizontally cutting the newly-cultured trunk at a position of 100cm, and simultaneously culturing the second layer and the third layer of pendulous corona according to the same method; after each pruning, the tree body is sprayed with auxin, and the concentration is 800 mg/L; in 6 months of vigorous growth season, 2kg-3kg of urea is applied to each plant; in the dormancy stage, 8kg of decomposed farmyard manure is applied to each plant.
Compared with the prior art, the invention has the following advantages:
1. according to the invention, superior trees with the characteristic of drooping branches are selected as the scion stock trees, so that drooping hackberry trees with consistent drooping branch characteristics can be cultured;
2. according to the method, the hackberry with larger specification is selected as the stock to be subjected to high position grafting, so that the nursery cultivation time of the hackberry with larger specification can be shortened, and the hackberry with larger specification can be cultivated as soon as possible;
3. the invention can culture the drooping branches with obvious trunk by the mode of assisting the trunk growth, and can culture the umbrella-shaped crown with uniform branch density by pruning the branches of each layer of drooping branches;
4. according to the invention, after each pruning, auxin is sprayed on the tree body to promote the branches to grow in an extending way, so that softer and elegant drooping twigs can be cultured;
5. the nutrition accumulation of the celtis sinensis vertical shoot seedlings can be promoted by matching with fertilizer management, and the celtis sinensis vertical shoot seedlings with strong plants, obvious trunks and long and elegant small branches can be obtained as soon as possible.
Detailed Description
The invention will be further described with reference to specific examples, the advantages and features of which will become apparent from the description, but which are given by way of illustration only and do not limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims.
Example 1
Collecting ears on a mother tree marked as 'superior tree 1', collecting the current-year branches in 1 month every year, collecting the current-year branches with thickness of 0.5cm, trimming the current-year branches into 50cm in length, binding each 50 branches in a bundle, sealing two ends of each ear with wax, wrapping the two ends with wet cloth and plastic films, and storing the two ends in a refrigeration house at the temperature of 1 ℃;
selecting a single-stem hackberry with the diameter of 3cm from the stock in the step (2), carrying out high-position grafting by horizontally cutting at the position of 2m, and selecting different positions to graft 2 scions by a bark-inserting grafting mode;
step (3) inserting a bamboo pole with the height larger than 3m into the root of the tree when the scion sprouts to 50cm, selecting a branch with a larger upward growth tendency as a trunk to bind to guide the branch to grow upwards, trimming other sprouts, removing excessive and dense sprouts, keeping the branch density uniform, and simultaneously cutting the scion exceeding 50cm to promote more sprouts to culture a first layer of pendulous branch crowns; in the dormancy season of the second year, the newly cultured trunk is cut at 50cm, in the dormancy season of the third year, the newly cultured trunk is cut at 50cm, and meanwhile, the second layer and the third layer of pendulous corona are cultured according to the same method;
spraying auxin; after each pruning, the tree body is sprayed with auxin with the concentration of 500mg/L, so that the branches are promoted to elongate and grow, and softer and elegant drooping twigs are cultured;
step (5) applying 1kg of urea to each plant every month in the vigorous growth season of 5 months; in the dormancy stage of fallen leaves, 5kg of decomposed farmyard manure is applied to each plant.
Example 2
Collecting ears on a mother tree marked as a superior tree 2, collecting the current-year branches in 1 month every year, collecting the current-year branches with the thickness of 0.8cm, trimming the current-year branches into 80cm long branches, binding each 80 branches in a bundle, sealing two ends of each ear with wax, wrapping the two ends with wet cloth and a plastic film, and storing the two ends in a refrigerator at 3 ℃;
selecting a single-stem hackberry with the diameter of 4cm from the stock in the step (2), carrying out high-position grafting by horizontally cutting at the position of 2m, and selecting different positions to graft 3 scions by a bark-inserting grafting mode;
step (3) inserting a bamboo pole with the height larger than 4m into the root of the tree when the scion sprouts to 50cm, selecting a branch with a larger upward growth tendency as a trunk to bind to guide the branch to grow upwards, trimming other sprouts, removing excessive and dense sprouts, keeping the branch density uniform, and simultaneously cutting off the scion exceeding 60cm to promote more sprouts to culture a first layer of pendulous branch crowns; in the dormancy season of the second year, horizontally cutting the newly-cultured trunk at a position of 100cm, in the dormancy season of the third year, horizontally cutting the newly-cultured trunk at a position of 100cm, and simultaneously culturing the second layer and the third layer of pendulous corona according to the same method;
spraying auxin; after each pruning, the tree body is sprayed with auxin, the concentration is 800mg/L, so that the branches are promoted to grow in an extending way, and softer and elegant drooping twigs are cultured;
step (5) applying 2kg of urea to each plant every month in the vigorous growth seasons of 5 months and 6 months; in the dormancy stage of fallen leaves, 8kg of decomposed farmyard manure is applied to each plant.
Example 3
Collecting ears on a mother tree marked as a superior tree 2 in 1 month every year, collecting branches growing in the same year and having the thickness of 1cm, trimming the branches into 100cm, binding each 100 branches in a bundle, sealing two ends of each ear with wax, wrapping the two ends with wet cloth and plastic films, and storing the two ends in a refrigerator at 5 ℃;
selecting a single-stem hackberry with the diameter of 5cm from the stock in the step (2), carrying out high-position grafting by horizontally cutting at the position of 2m, and selecting different positions to graft 4 scions by a bark-inserting grafting mode;
step (3) inserting a bamboo pole with the height larger than 5m into the root of the tree when the scion sprouts to 70cm, selecting a branch with a larger upward growth tendency as a trunk to bind to guide the branch to grow upwards, trimming other sprouts, removing excessive and dense sprouts, keeping the branch density uniform, and simultaneously cutting the scion exceeding 70cm to promote more sprouts to culture a first layer of pendulous branch crowns; in the dormancy season of the second year, the newly-cultured trunk is cut at 150cm, in the dormancy season of the third year, the newly-cultured trunk is cut at 150cm, and meanwhile, the second layer and the third layer of pendulous corona are cultured according to the same method;
spraying auxin; after each pruning, the tree body is sprayed with auxin with the concentration of 1000mg/L, so that the branches are promoted to elongate and grow, and softer and elegant drooping twigs are cultured;
step (5) applying 3kg of urea to each plant every month in vigorous growth seasons of 5, 6 and 7 months; in the dormancy stage of fallen leaves, 10kg of decomposed farmyard manure is applied to each plant.
The applicant of the invention respectively adopts the designs of the embodiments 1-3 to culture the hackberry in 2017 in 3 months, 30 strains of each embodiment are repeated for 3 times, and the total number of experimental designs is 270 strains; the planting environment of the hackberry is basically consistent with the soil; after culturing for 3 years, counting the growth condition of the nursery stock in 11 months in 2019, wherein the specific data are as follows:
as can be seen from the above table, examples 2 and 3 are more effective than example 1 because the grafting height is higher and the distance between the canopy layers is larger; the size of the stock is larger, the grafting height is high, the distance between the canopy layers is large, and the cultivation of the drooping branch type greening big seedlings with tall trees and full canopy type is more facilitated.
Claims (6)
1. A cultivation method of a celtis pendula greening big seedling is characterized by comprising the following steps:
s1, the scion is a tree with obvious twig verticality characteristic and is a scion stock tree;
s2, selecting a single-stem hackberry with the diameter of 3-5cm for the stock, performing high grafting by horizontally cutting at the position of 2-2.8m, and grafting 2-4 scions by selecting different positions in a bark grafting manner;
s3, when the scion sprouts to 50-70cm, inserting a bamboo rod with the height larger than 3-5m into the root of the tree, selecting a branch with a larger upward growth tendency as a trunk to bind and guide the branch to grow upwards, trimming other sprouts, removing excessive dense sprouts, simultaneously cutting over the scion with the length of more than 50cm, and culturing a first layer of pendulous branch crowns; in the dormant season of the second year, the newly cultured trunk is cut at a position of 50-150cm, in the dormant season of the third year, the newly cultured trunk is cut at a position of 50-150cm, and meanwhile, the second layer and the third layer of pendulous branch crowns are cultured according to the same method;
s4, spraying auxin to the tree body after each pruning, wherein the concentration is 500mg/L-1000 mg/L;
s5, applying 2kg-3kg of urea to each plant every month in the vigorous growth season of 6-7 months; applying 8kg-10kg of decomposed farmyard manure to each plant in the dormancy stage of 12 months to 1 month in the next year.
2. The method for cultivating a greening seedling of Cynanchum komarovii according to claim 1, wherein said scion in S1 is an annual shoot with a thickness of 0.5-1.0 cm.
3. The method for cultivating the greening big seedlings of the hackberry trees according to claim 1, wherein the rootstock in S2 is a single-stem hackberry tree with a diameter of 4cm, the single-stem hackberry tree is horizontally cut at a position of 2.4m for high position grafting, and 3 scions are grafted by a bark grafting method in different directions.
4. The method for cultivating a greening big seedling of Cynanchum komarovii according to claim 1, wherein the trunk cultivation in S3 is that when the scion sprouts to 60cm, a bamboo rod with a height greater than 4m is inserted into the root of the tree, a branch with a greater upward growth tendency is selected as the trunk to be bound to guide the upward growth of the branch, and other sprouts are trimmed to remove too many dense sprouts and to cut short the scion exceeding 50cm, and the cultivation of the crown of the first layer of the scion is performed; the dormancy season of the second year is cut horizontally at the position of 100cm of the newly cultured trunk, and the dormancy season of the third year is cut horizontally at the position of 100cm of the newly cultured trunk.
5. The method for cultivating the greening big seedlings of the hackberry as claimed in claim 1, wherein the auxin is sprayed to the trees after each pruning in S4, and the concentration is 800 mg/L.
6. The method for cultivating greening seedlings of Cynanchum komarovii as claimed in claim 1, wherein 2kg of urea is applied to each plant per month in the vigorous growing season of 6-7 months as described in S5; 9kg of decomposed farmyard manure is applied to each plant in the dormancy stage of 12 months to 1 month in the next year.
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