CN108605537B

CN108605537B - Method for raising seedlings of ilex purpurea by cutting tender branches

Info

Publication number: CN108605537B
Application number: CN201810429374.3A
Authority: CN
Inventors: 李明
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-05-08
Filing date: 2018-05-08
Publication date: 2021-03-30
Anticipated expiration: 2038-05-08
Also published as: CN108605537A

Abstract

The invention discloses a method for raising seedlings by cutting by using shoots of ilex purpurea hassk, which utilizes the shoots of the young shoots of the resulting ilex purpurea hassk to breed seedlings of the ilex purpurea hassk by cutting, can keep the hereditary property of the excellent stock plant of the ilex purpurea hassk, and realizes the rapid breeding and cultivation of the ilex purpurea hassk. The method and the structure for pretreating the scion wood and supplying the scion wood by infusion are key, the problem that the breeding of the ammopiptanthus rubra seeds is difficult is solved, the breeding speed is high, and the method is simple.

Description

Method for raising seedlings of ilex purpurea by cutting tender branches

Technical Field

The invention relates to the technical field of forest seedling breeding, in particular to a method for raising seedlings of ilex purpurea by cutting tender branches.

Background

The Ilex purpurea (Ilex chinensis Sims) belongs to Aquifoliaceae (Aquifoliaceae) Ilex (Ilex), is evergreen arbor, is distributed in south provinces of Yangtze river basin in China, is relatively resistant to dampness, has strong germination capacity and is resistant to pruning. The tree is a common ornamental tree species in a garden in China, the height of the tree can reach more than 20 meters, the tree shape is attractive and neat, branches and leaves are dense, and the plant diseases and insect pests are few. The leaves are dark green and glossy, are dark red after being dried, have the flowering period of 5-6 months, are ripe for 10-11 months, are dark red after being ripe, accumulate red fruits on the branches in autumn, can not fall off in winter, have high ornamental value, are tough and tough, can be used as fine industrial raw materials, are used for manufacturing toys, sculptures, tool handles, brush backs, wood combs and the like, are used as medicinal barks and seeds, are used as a strengthening agent, have strong bacteriostatic and bactericidal effects, have high water content of barks, branches and leaves, can effectively separate and resist forest fires, and are ideal excellent tree species integrating landscapes, roadways and fire prevention. Therefore, the Hongguo holly serves as an important local plant resource in southern areas and can serve as a new excellent variety to meet and expand requirements of afforestation and greening and flower and tree markets.

However, the seedlings of the holly purpurea are very difficult to grow, because the inflorescence of the holly purpurea is parasol inflorescence or umbrella inflorescence, and is singly born in the axilla of the current-year branch or clustered in the axilla of the 2-year branch, the axilla of the dilute single flower is born, the flower is small, and the parthenocarpy is caused by abortion, the seed setting rate is only about 10 percent, the dormancy period of the seeds is long, the germination is difficult, the growth of the seedling period is slow, and the careful maintenance and management are needed. And secondly, the male and female heteroplants of the ammopiptanthus monogyni cannot be effectively controlled to breed the ammopiptanthus monogyni seedlings which can bear fruits in the seed seedling culture production. Therefore, the breeding of the ammopiptanthus rubra becomes a difficult point for developing seedlings of the ammopiptanthus rubra, and a rapid breeding method does not exist according to the prior art, so that the demand of people cannot be met.

Through years of experimental research, the applicant explores a method for raising seedlings by cutting by using the tender branches of the ilex purpurea hassk, and the method is a brand-new method for raising the seedlings by cutting, and has the advantages of wide seedling material sources, low technical requirement and high survival rate. The method can effectively solve the problem of difficulty in breeding the holly and provide technical support for the mass production of the Hongguo holly.

The invention content is as follows:

the invention aims to provide a method for raising seedlings of ilex purpurea hassk by cutting tender branches of ilex purpurea hassk, which is used for breeding seedlings of ilex purpurea hassk by utilizing the young branches of the ilex purpurea hassk, solves the problem of difficult breeding of ilex purpurea hassk seeds, has the advantages of high breeding speed and simple method, can keep the excellent mother plant genetic characteristic of the ilex purpurea hassk, and realizes the rapid breeding and cultivation of the ilex purpurea hassk.

The technical scheme of the invention is as follows:

a method for raising seedlings of ilex purpurea by cutting tender branches is characterized by comprising the following steps: the method comprises the steps of mother tree selection, mother tree management and protection cultivation, cutting shoot collection, cutting shoot treatment, cutting shoot cuttage, infusion supply of cutting shoots and management after cutting, selection of excellent and strong seedling with no diseases and insect pests as a mother tree, establishment of a cutting shoot garden, cutting shoot and promoting germination, selection of semi-lignified branches as cutting shoots, nondestructive treatment of the growth-promoting roots of the cutting shoots, insertion of the cutting shoots in a seedling raising cup with a perforated substrate, in-vitro nutrition supply, cutting breeding and obtaining excellent and strong red fruit winter green seedlings, and comprises the following operation steps:

(1) selecting a mother tree: selecting good and strong seedling with no disease or pest as mother tree, and establishing cutting garden;

(2) and (3) managing, protecting and cultivating the mother trees: planting the mother tree in a nursery, cutting a pile to promote germination, cutting a trunk to cultivate scion sprouts after the germinated branches grow, and removing weak branches of diseased branches; nurturing the mother tree for 2-3 times every year, and fertilizing and rejuvenating in time;

(3) and (3) cutting collection: collecting annual semi-lignified branches from a mother tree in the late 5 th to middle 6 th months, wherein the diameter of the branches is 3-5 mm, trimming and manufacturing cutting slips, the length of the cutting slips is 40-70 mm, 2-5 buds and 1-2 leaves are reserved on each cutting slip, the lower shearing end face of each cutting slip is located 5-10 mm below the bud, and the upper shearing end face and the lower shearing end face of each cutting slip are perpendicular to the branches;

(4) pretreatment of the scion strips: sterilizing the upper and lower cut end surfaces of the cutting wood with 0.5-0.8% potassium permanganate solution, sealing the upper cut end surface with a sterilized upper end cover to prevent water evaporation and external bacteria invasion, coating a rooting colloid layer prepared from a culture substrate and rooting elements on the lower cut end surface of the cutting wood, arranging a water slow-release layer at the lower end of the rooting colloid layer, sleeving the lower end cover on the lower cut end surface of the cutting wood, arranging the rooting colloid layer and the water slow-release layer in the lower end cover, so that in the cutting process of the cutting wood, the lower end surface of the cutting wood is sealed by the lower end cover, the bark layer of the lower cut end surface is not pushed by the substrate to be damaged during insertion, the peeling between the bark layer and the xylem of the cutting wood is avoided, the probability of bark scratching is reduced, and the accidental damage of the cutting wood in the cutting process is avoided, the lower end surface of the cutting scion is provided with the rooting colloidal layer and the moisture slow-release layer, so that the cutting scion can be ensured to contain rooting elements with specific concentration in the body of the cutting matrix section, the cutting scion can not be diluted due to overhigh moisture in soil, the pollution and the damage of germs in the soil to a tree body can be avoided, the quick rooting of the lower end of the cutting scion can be promoted, and the survival rate of the cutting scion can be ensured.

(5) Cutting the scion wood: preparing a cutting seedbed in a nursery land, soaking a cutting matrix in water 1-2 days before cutting, spraying 60-100ml of paraquat and trifluralin herbicide mixed with 50kg of water on the seedbed, arranging seedling culture cups filled with the culture matrix on the cutting seedbed, punching pre-inserting holes in the matrix at the middle positions of the seedling culture cups by using a cutting puncher, inserting the lower ends of cutting scions into the pre-inserting holes, enabling the cutting depth to be 20-25 mm, and compacting culture soil around the scion branches by hands to enable the culture soil to be attached to the scion branches;

(6) and (3) supplying the fringe strips by transfusion: after cuttage, an infusion needle is inserted into the cortex at the lower part of the cuttage scion, the infusion needle is communicated with a nutrient solution source through an infusion tube, and the nutrient solution source is positioned above the infusion needle, so that in-vitro infusion and nutrition supply for the cuttage scion is realized, the nutrition of the cuttage scion in the rooting process is ensured, after rooting, the nutrition is absorbed by a root system from a matrix, and the time for infusion and nutrition supply is determined according to a cuttage cultivation process.

(7) Managing after cuttage: building a sunshade and ventilation shed frame, building a sunshade and ventilation shed frame with the height of 70-90cm on a seedbed after cuttage, covering a plastic film for moisturizing, covering a sunshade net on the sunshade and sealing the periphery of the plastic film by soil, and fixing the sunshade net by using piles and ropes; opening the plastic film and the sunshade net for ventilation and air exchange every 7-9 days, and spraying 800-fold carbendazim sterilization liquid once; and after the cutting shoots are stable, removing the plastic film, shading, and removing the shading net after the seedlings grow new leaves, so that the seedlings adapt to illumination, and performing pest control.

Further, the rooting agent is 400-700ppm naphthylacetic acid.

Further, the mother tree is selected from 8-10 years of strong and high-quality holly roots as the mother tree.

Further, in the step of the management and protection cultivation of the mother trees, the cultivation of the mother trees is to cut the mother plants which have fruit bearing in 8-10 years into the nursery land for cultivation, the height of the cut pile is 200 plus one year 500 mm, the branches which germinate after the cut pile are cut in the next year are cut and cultivated, the diseases and weak branches are removed, the robust branches are used as secondary germination branches, the branches are cut off before overwintering, the height of the cut off is 300 plus one year 500 mm, and the germination branches on the main trunk and the branches are collected according to requirements in the third year.

Furthermore, in the process of managing and protecting the cultivation of the mother trees, ditching and fertilizing for 1 time in 3-4 months every year, applying 0.4-0.8kg of decomposed organic fertilizer and 0.3kg of compound fertilizer to each plant, immediately weeding and loosening the soil of the mother trees after picking the spikes, and fertilizing again, wherein 0.5-0.8kg of compound fertilizer containing nitrogen, phosphorus, potassium and trace elements is applied to each plant.

Further, the length of the cutting scion is 60-70 mm, the diameter of the base of the scion is 3-4 mm, the lower leaves are cut off, and 2 leaves on the upper part and 2 buds are reserved.

Further, the cutting medium is obtained by selecting loam or sandy loam in nursery lands, grinding for 2-4 times by using a rotary cultivator, wherein the grain diameter of the soil is 0.1-0.3cm, and then bagging and arranging on a seedbed.

Further, the cuttage puncher comprises a handle, a depth limiting disc and a punching rod, wherein the handle is arranged above the depth limiting disc, the punching rod is arranged below the depth limiting disc, the diameter of the punching rod is 4-6 mm, and the length of the punching rod is 20-40 mm; the length of the handle is 100-150 mm, and the diameter is 10-15 mm; the diameter of the depth limiting disc is 20-30 mm.

Further, in the management step after cuttage, liquid pesticide of 50 percent phoxim and 40 percent lesben 800-fold is sprayed for pest control to eliminate the harm of aphids and scarab pests.

Compared with the prior art, the invention has the following prominent substantive characteristics and remarkable progress:

the invention relates to a method for raising seedlings by cutting tender branches of red fruit holly, which is a brand new method for raising seedlings of red fruit holly, breaks through the technical prejudice that the tree species can not be raised by cutting tender branches, carries out disinfection and sealing treatment on the upper end section, aims to prevent water evaporation and the invasion of external pathogenic bacteria, changes the lower end section into a horizontal plane, uses rooting element to carry out soaking and root-destroying treatment after disinfection treatment, and coats a colloidal layer prepared from the rooting element and a culture medium on the lower end surface, aims to supplement the concentration of the rooting element at the lower part in the tender branch cutting body, and adds a water slow-release layer at the lower end of the colloidal layer to slowly supplement the water of the tree body. The lower end cover is covered and sealed on the lower end surface of the cutting spike, and the purpose is as follows: the tree bark is prevented from being detached by soil during insertion, the probability of scratching the tree bark is reduced, accidental damage to the cutting slips in the cutting process is avoided, pollution and damage of germs in soil to a tree body can also be avoided, the lower end of the cutting slips is promoted to rapidly root, and the survival rate of the cutting slips is ensured.

The purpose of supplementing nutrient solution in vitro after the cuttage of the twig is to ensure that the twig maintains normal life activity before rooting, is favorable for the growth of rooting and root systems, and improves the rooting speed and the rooting quantity, thereby improving the survival rate of the cuttage seedling.

The invention has unique principle, simple structure, convenient operation and low requirement on implementation conditions, and the survival rate of the rooting can reach 96 percent after the test, thereby being capable of rapidly breeding a large number of seedlings of the ilex purpurea hassk and solving the problem of difficult seed breeding.

Secondly, in the cutting seedling method of the twig of the ammopiptanthus nanus, the fruiting mother tree of 8-10 years is selected, on one hand, a large number of strong sprouts can be cultivated through cutting piles and trunks, more cuttings can be collected, and on the other hand, the cultivated nursery stock can keep the character of the fruiting mother tree.

And thirdly, the puncher is used for establishing holes during cuttage, so that damage of the cortex of the twig cut of the ilex purpurea can be greatly reduced, the water absorption and rooting capacity of the cut is enhanced, and the utilization rate of cutting slips is improved by more than 20% and the rooting rate is improved by more than 30%.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural diagram of a cutting shoot in a seedling raising cup;

FIG. 3 is a schematic diagram of a construction of a cutting punch;

in the figure: 1-cutting scion wood; 11-bud heads; 12-a blade; 13-cortex; 2-upper end cover; 3-rooting colloidal layer; 4-a moisture slow-release layer; 5-lower end cap; 6-seedling raising cup; 7-cutting a puncher; 71-a handle; 72-depth disc; 73-a perforating rod; 8-transfusion needle; 9-a transfusion tube; 10-source of nutrient solution.

The specific implementation mode is as follows:

the following describes the embodiments of the present invention with reference to the accompanying drawings.

Example 1:

a method for raising seedlings of ilex purpurea by cutting tender branches comprises the steps of mother tree selection, mother tree management and protection cultivation, cutting collection, cutting treatment, cutting cuttage, management after the cutting and transfusion supply of scion wood, selecting excellent and strong seedling with no plant diseases and insect pests as a mother tree, establishing a cutting garden, cutting branches and promoting germination, selecting semi-lignified branches as cutting scions, carrying out the non-destructive treatment of the growth promoting roots of the cutting scions, inserting the cutting scions into seedling raising cups with perforated matrixes, supplying nutrition in vitro, and obtaining excellent and strong seedlings of ilex purpurea by cutting breeding, wherein the method comprises the following operation steps:

(3) and (3) cutting collection: collecting annual semi-lignified branches from a mother tree in the middle ten days of 5-6 months, wherein the diameters of the branches are 3-5 mm, trimming and making into cutting slips, the lengths of the cutting slips are 40-70 mm, 2-5 bud heads 11 and 1-2 leaves 12 are reserved on each cutting slip, the lower shearing end surface of each cutting slip is positioned 5-10 mm below a bud, and the upper shearing end surface and the lower shearing end surface of each cutting slip are perpendicular to a branch;

(4) pretreatment of the scion strips: the upper shearing end face and the lower shearing end face of a cutting wood strip 1 to be cut are disinfected by 0.5-0.8% potassium permanganate concentrated solution, then the upper shearing end face is covered by a disinfected upper end cover 2 to prevent moisture evaporation and external germ invasion, a rooting colloidal layer 3 prepared by a culture substrate and rooting elements is coated on the lower shearing end face of the cutting wood strip 1, a moisture slow-release layer 4 is arranged at the lower end of the rooting colloidal layer 3, the lower end cover 5 is sleeved on the lower shearing end face of the cutting wood strip 1, the rooting colloidal layer 3 and the moisture slow-release layer 4 are both arranged in the lower end cover 5, thus, in the cutting process of the cutting wood strip 1, the lower end face of the cutting wood strip 1 is covered by the lower end cover 5, the bark layer of the lower shearing end face cannot be pushed by the substrate to be damaged during insertion, the bark layer cannot be peeled from the wood part, the probability of bark scratching is reduced, and accidental damage of the cutting wood strip 1 in the cutting process is avoided, the lower end surface of the cutting scion 1 is provided with a rooting colloidal layer 3 and a moisture slow-release layer 4, so that the cutting scion 1 can be ensured to contain rooting elements with specific concentration in the cutting matrix section, the dilution caused by overhigh moisture in soil can be avoided, the pollution and the damage of germs in the soil to a tree body can be avoided, the quick rooting of the lower end of the cutting scion 1 can be promoted, and the survival rate of the cutting scion 1 can be ensured.

(5) Cutting the scion wood: preparing a cutting seedbed in a nursery land, soaking a cutting matrix in water 1-2 days before cutting, spraying 60-100ml of paraquat and trifluralin herbicide mixed with 50kg of water on the seedbed, arranging a seedling cup 6 filled with the culture matrix on the cutting seedbed, punching a pre-inserting hole in the matrix in the middle of the seedling cup 6 by using a cutting puncher 7, inserting the lower end of a cutting scion 1 into the pre-inserting hole, wherein the cutting depth is 20-25 mm, and compacting culture soil around the branches of the scion by hands to enable the culture soil to be attached to the branches of the scion;

(6) and (3) supplying the fringe strips by transfusion: after cuttage, an infusion needle 8 is inserted into a lower cortex 13 of the cutting 1, the infusion needle 8 is communicated with a nutrient solution source 10 through an infusion tube 9, and the nutrient solution source 10 is positioned above the infusion needle 8, so that in-vitro infusion and nutrition supply for the cuttage cutting 1 is realized, nutrition of the cutting in the cuttage rooting process is guaranteed, after rooting, the nutrition is absorbed from a matrix by a root system, and the time for infusion and nutrition supply is determined according to a cuttage cultivation process.

In the scheme, the rooting agent is 400-700ppm naphthylacetic acid. The mother tree is selected from 8-10 years of strong ilex with high quality as the mother tree. In the step of the management and protection cultivation of the mother trees, the cultivation of the mother trees is to cut the stump of the mother plants which have fruit bearing in 8-10 years in a nursery field for cultivation, the stump cutting height is 200 plus 500 mm, the branches which germinate after stump cutting are cut in the next year, the sick and weak branches are removed, the robust branches are used as secondary germination branches, the branches are cut off before overwintering, the trunk cutting height is 300 plus 500 mm, and the germination branches on the main trunk and the branches are collected according to requirements in the third year. In the process of managing and protecting the parent trees, ditching and fertilizing for 1 time in 3-4 months every year, applying 0.4-0.8kg of decomposed organic fertilizer and 0.3kg of compound fertilizer to each plant, immediately weeding and loosening the parent trees after picking the spikes, and applying 0.5-0.8kg of compound fertilizer containing nitrogen, phosphorus, potassium and trace elements to each plant. The cutting medium is obtained by selecting loam or sandy loam in nursery land, pulverizing with rotary cultivator for 2-4 times, and bagging and arranging on seedbed, wherein the soil grain diameter is 0.1-0.3 cm. The cuttage puncher 7 comprises a handle 71, a depth limiting disc 72 and a punching rod 73, wherein the handle 71 is arranged above the depth limiting disc 72, the punching rod 73 is arranged below the depth limiting disc 72, the diameter of the punching rod 73 is 4-6 mm, and the length of the punching rod 73 is 20-40 mm; the handle 71 is 100-150 mm long and 10-15 mm in diameter; the diameter of the depth-limiting disc 72 is 20-30 mm. In the management step after cuttage, liquid pesticide of 50 percent phoxim and 40 percent leston 800-.

Claims

1. A method for raising seedlings of ilex purpurea by cutting tender branches is characterized by comprising the following steps: the method comprises the steps of mother tree selection, mother tree management and protection cultivation, cutting shoot collection, cutting shoot treatment, cutting shoot cuttage, infusion supply of cutting shoots and management after cutting, selection of excellent and strong seedling with no diseases and insect pests as a mother tree, establishment of a cutting shoot garden, cutting shoot and promoting germination, selection of semi-lignified branches as cutting shoots, nondestructive treatment of the growth-promoting roots of the cutting shoots, insertion of the cutting shoots in a seedling raising cup with a perforated substrate, in-vitro nutrition supply, cutting breeding and obtaining excellent and strong red fruit winter green seedlings, and comprises the following operation steps:

(1) selecting a mother tree: selecting good and strong seedling with no disease or pest as mother tree, and establishing cutting garden

(4) pretreatment of the scion strips: the method comprises the steps of disinfecting the upper shearing end face and the lower shearing end face of a cutting wood strip (1) to be cut by using 0.5-0.8% potassium permanganate concentrated solution, then sealing the upper shearing end face by using a disinfected upper end cover (2) to prevent moisture evaporation and invasion of external germs, coating a rooting colloidal layer (3) prepared by a culture substrate and rooting elements on the lower shearing end face of the cutting wood strip (1), arranging a moisture slow-release layer (4) at the lower end of the rooting colloidal layer (3), sleeving the lower end cover (5) on the lower shearing end face of the cutting wood strip (1), arranging the rooting colloidal layer (3) and the moisture slow-release layer (4) in the lower end cover (5), covering and sealing the lower end face of the cutting wood strip (1) by the lower end cover (5) in the cutting process of the cutting wood strip (1), preventing the bark layer of the lower shearing end face from being pushed and damaged by the substrate during insertion and further preventing the bark of the cutting wood strip from being stripped from wood part, the probability of scratching the bark is reduced, accidental damage to the cutting slips (1) in the cutting process is avoided, and the lower end face of the cutting slips (1) is provided with the rooting colloidal layer (3) and the moisture slow-release layer (4), so that the cutting slips (1) are guaranteed to contain rooting elements with specific concentration in the cutting matrix section, the cutting matrix section is not diluted due to overhigh moisture in soil, the pollution and damage of germs in the soil to a tree body can be avoided, the quick rooting of the lower end of the cutting slips (1) can be promoted, and the survival rate of the cutting slips (1) is guaranteed;

(5) cutting the scion wood: finishing a cutting seedbed in a nursery land, soaking a cutting matrix in water 1-2 days before cutting, spraying 60-100ml of paraquat and trifluralin herbicide mixed with 50kg of water on the seedbed, arranging a seedling cup (6) filled with a culture matrix on the cutting seedbed, punching a pre-inserting hole in the matrix in the middle of the seedling cup (6) by using a cutting puncher (7), inserting the lower end of a cutting scion (1) into the pre-inserting hole, wherein the cutting depth is 20-25 mm, compacting culture soil around the scion branch by hands, and attaching the culture soil to the scion branch;

(6) and (3) supplying the fringe strips by transfusion: after cuttage, inserting an infusion needle (8) into the cortex at the lower part of the cuttage scion strip (1), wherein the infusion needle (8) is communicated with a nutrient solution source (10) through an infusion tube (9), and the nutrient solution source (10) is positioned above the infusion needle (8), so that in-vitro infusion and nutrient supply of the cuttage scion strip (1) is realized, the nutrition of the cuttage scion strip in the rooting process is ensured, the nutrition is absorbed from a matrix by a root system after the cuttage rooting, and the time for the infusion and nutrient supply is determined according to a cuttage cultivation process;

2. The method for raising seedlings of ammopiptanthus purpurea by using twig cutting according to claim 1, which comprises the following steps: the rooting agent is 400-700ppm naphthylacetic acid.

3. The method for raising seedlings of ammopiptanthus purpurea by using twig cutting according to claim 1, which comprises the following steps: the mother tree is selected from 8-10 years of strong ilex with high quality as the mother tree.

4. The method for raising seedlings of ammopiptanthus purpurea by using twig cutting according to claim 1, which comprises the following steps: in the step of the management and protection cultivation of the mother trees, the cultivation of the mother trees is to cut the stump of the mother plants which have fruit bearing in 8-10 years in a nursery field for cultivation, the stump cutting height is 200 plus 500 mm, the branches which germinate after stump cutting in the next year are cut and cultivated, the sick and weak branches are removed, the robust branches are used as secondary germination branches, the branches are cut off before overwintering, the trunk cutting height is 300 plus 500 mm, and the germination branches on the main trunk and the branches are collected according to requirements in the third year.

5. The method for raising seedlings of ammopiptanthus purpurea by using twig cutting according to claim 1, which comprises the following steps: in the process of managing and protecting the parent trees, ditching and fertilizing for 1 time in 3-4 months every year, applying 0.4-0.8kg of decomposed organic fertilizer and 0.3kg of compound fertilizer to each plant, immediately weeding and loosening the parent trees after picking the spikes, and applying 0.5-0.8kg of compound fertilizer containing nitrogen, phosphorus, potassium and trace elements to each plant.

6. The method for raising seedlings of ammopiptanthus purpurea by using twig cutting according to claim 1, which comprises the following steps: the length of the cutting scion is 40-70 mm, the diameter of the base of the scion is 2-4 mm, the lower leaves are cut off, and the upper 1-2 leaves are reserved.

7. The method for raising seedlings of ammopiptanthus purpurea by using twig cutting according to claim 1, which comprises the following steps: the cutting medium is obtained by selecting loam or sandy loam in nursery land, pulverizing with rotary cultivator for 2-4 times, and bagging and arranging on seedbed, wherein the soil grain diameter is 0.1-0.3 cm.

8. The method for raising seedlings of ammopiptanthus purpurea by using twig cutting according to claim 1, which comprises the following steps: the cuttage puncher (7) comprises a handle (71), a depth limiting disc (72) and a punching rod (73), wherein the handle (71) is arranged above the depth limiting disc (72), the punching rod (73) is arranged below the depth limiting disc (72), and the punching rod (73) is 4-6 mm in diameter and 20-40 mm in length; the length of the handle (71) is 100-150 mm, and the diameter is 10-15 mm; the diameter of the depth-limiting disc (72) is 20-30 mm.

9. The method for raising seedlings of ammopiptanthus purpurea by using twig cutting according to claim 1, which comprises the following steps: in the management step after cuttage, liquid pesticide of 50 percent phoxim and 40 percent leston 800-.