CN114027040B - Method for raising seedlings of old branches of hydrangea by cutting - Google Patents
Method for raising seedlings of old branches of hydrangea by cutting Download PDFInfo
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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
- A01G2/00—Vegetative propagation
- A01G2/10—Vegetative propagation by means of cuttings
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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
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/10—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material
- A01G24/12—Growth substrates; Culture media; Apparatus or methods therefor based on or containing inorganic material containing soil minerals
- A01G24/15—Calcined rock, e.g. perlite, vermiculite or clay aggregates
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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
- A01G24/00—Growth substrates; Culture media; Apparatus or methods therefor
- A01G24/20—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material
- A01G24/28—Growth substrates; Culture media; Apparatus or methods therefor based on or containing natural organic material containing peat, moss or sphagnum
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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
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/02—Receptacles, e.g. flower-pots or boxes; Glasses for cultivating flowers
- A01G9/029—Receptacles for seedlings
- A01G9/0299—Handling or transporting of soil blocks or seedlings
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/10—Aromatic or araliphatic carboxylic acids, or thio analogues thereof; Derivatives thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/36—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings
- A01N43/38—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom five-membered rings condensed with carbocyclic rings
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Abstract
The invention provides a cutting seedling raising method for old branches of hydrangea, belonging to the technical field of hydrangea asexual propagation; in the invention, old branches of the hydrangea are adopted for cutting, raising seedlings and cultivating flowering products in the same year, and the cutting time, the substrate, the rooting agent, the spike preparation, the cutting, the post-cutting management, the transplanting, the post-transplanting management and other procedures of the hydrangea are optimized and improved, so that the old branches which are subjected to differentiation and trimming are subjected to cutting, the purposes of cutting in the same year and flowering in the same year are realized, the production period can be greatly shortened, the production cost is reduced, and the method has important significance in promoting the development of the hydrangea industry.
Description
Technical Field
The invention belongs to the technical field of hydrangea asexual propagation, and particularly relates to a hydrangea old branch cutting seedling method.
Background
Silk ball [Hydrangea macrophylla (Thunb.) Ser.]Also known as hydrangea, herba Cynomorii, hydrangea, etc., which are ornamental plants of hydrangea genus of Saxifragaceae family. The hydrangea has strong stress resistance and good adaptability, and the umbrella house-shaped umbrella has great inflorescenceThe flower is rich in flower color, various in flower types and long in flowering phase, and is an important landscape plant. Therefore, the hydrangea is widely used for garden beautification, park greening, potted flowers, fresh cut flowers and the like, and has high economic value. In addition, the hydrangea has stronger aluminium resistance, and part of varieties can be controlled by adjusting the pH value and Al of soil 3+ The content of the red, purple, blue-purple or blue color is different, and the color is called as chameleon in plants, so that the ornamental value is high.
Most of the hydrangea flowers are sterile flowers, the setting rate is low, and the seeds are tiny and the germination rate is extremely low, so that the sexual reproduction cannot meet the production requirement. At present, the Sparassis crispa is mainly bred by tissue culture and cutting, and the tissue culture has the advantages of high breeding coefficient, capability of annual production and the like, but needs to purchase special instruments and equipment such as an autoclave, an ultra-clean workbench and the like, and needs to construct special places such as an inoculation room, a tissue culture room and the like, and has high technical level requirement, large early investment and difficult implementation of common producers. The traditional cuttage materials are current annual shoots, the rooted seedlings can normally bloom only in the second year or even in the third year, and the seedlings become commercial products for sale.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a method for raising seedlings of old branches of hydrangea by cutting. In the invention, the cutting time, the substrate, the rooting agent, the cutting preparation, the cutting, the post-cutting management, the transplanting, the post-transplanting management and other procedures of the hydrangea are optimized and improved, the old branches which are subjected to flower bud differentiation and are trimmed are subjected to cutting, the purposes of cutting in the same year and flowering in the same year are realized, the production period can be greatly shortened, the production cost is reduced, and the method has important significance in promoting the development of the hydrangea industry.
In order to achieve the technical purpose, the invention is realized by the following technical scheme:
the invention firstly provides a method for raising seedlings of old branches of hydrangea by cutting, which comprises the following steps:
(1) Selecting cutting time: the cutting time is preferably 1 to 3 months per year, wherein the cutting time is preferably 1 to 2 months per year, and more preferably 1 to 2 last month per year.
(2) Preparing a cutting matrix: the cutting matrix is perlite or a mixture of peat soil and perlite, wherein the volume ratio of the peat soil to the perlite in the mixture is 5:1, and the cutting matrix is preferably perlite.
(3) Preparing a rooting agent: rooting powder (ABT), naphthalene Acetic Acid (NAA), indole Acetic Acid (IAA) and Indole Butyric Acid (IBA) are respectively configured to be 100-mg.L -1 Is prepared for later use.
(4) Preparing a plug: selecting a 32-hole plastic plug tray or a flat bottom seedling tray; the repeatedly used plug and seedling tray are washed or sprayed by 10 percent sodium hypochlorite solution, then washed by clear water for 2 to 3 times, and dried for use.
(5) Preparing cutting slips: selecting a variety which has strong resistance and good branching and has completed flower bud differentiation, and cutting fully lignified branches into cuttings, wherein the branches are cut into branches with average length of 5-8 cm (containing 1 node band and 1-2 buds) or 9-12 cm (containing 2 node bands and 3-4 buds), and 5-8 cm is preferable.
Further, the branches are selected from plant varieties which grow robustly and have no plant diseases and insect pests.
(6) Cutting: and (3) soaking the obtained cutting by adopting a rooting agent, wherein the solution at least floods the base part of the cutting by 0.5-cm during soaking.
Wherein, the cutting heads with the lengths of 5 to 8 and cm adopt the concentration of 100 to 200 mg.L -1 Is of concentration 400 mg.L -1 IBA or concentration of 600 mg.L -1 Any one of the IAAs is soaked for no more than 1 min, and IBA and IAA are treated for 10 s.
Further, the rooting agent is preferably used in a concentration of 100-mg.L -1 Is a part of the ABT of (C).
The cutting heads with the lengths of 9-12 cm adopt the concentration of 200 mg.L -1 Is 100 mg.L -1 The IBA of (B) is soaked for 1 min, and the IBA is treatedThe time was 5 min.
Further, the rooting agent is preferably at a concentration of 100 mg.L -1 Is not shown).
(7) Cutting: watering the plug tray filled with the matrix thoroughly before cutting, and inserting the longer cutting into the matrix by about 3 cm; and (3) fully inserting the part below the node into the matrix for the shorter cutting, covering and moisturizing the cutting with a preservative film after cutting, and removing the cutting after 2 days.
(8) Post-insertion management: watering after cutting for 1 week, wherein a bottom soaking mode is adopted during watering; the ambient temperature is preferably 20 to 25 ℃.
(9) Transplanting: transplanting is carried out 2 weeks after the cutting shoots root, and the transplanting matrix is a mixture of peat soil and perlite (the volume ratio of the peat soil to the perlite is 5:1).
(10) And (3) managing after transplanting: immediately watering the root fixing water after transplanting, and controlling the temperature at 20-25 ℃; the compound fertilizer is applied once a month.
The invention also provides application of the method for cutting and raising the seedlings of the hydrangea old branches in raising seedlings of hydrangea varieties with flower bud differentiation in autumn.
Further, the variety is preferably 'Shi Ouni ″ mimosa leaves'.
Compared with the prior art, the invention has the beneficial effects that:
the flower bud differentiation of most of the hydrangea varieties is started in autumn and ended in winter except for few varieties which can continuously bloom in the 'endless summer'. The general shaping and pruning of the hydrangea is mainly carried out before spring, and a large number of old branches are needed to be pruned at the moment so as to maintain vigorous growth vigor and compact plant types of plants. According to the invention, the old branches which are cut off and have been completed by flower bud differentiation are used for cutting before spring development, so that waste is changed into valuable, the purposes of cutting in the same year and flowering in the same year can be realized, the production period can be greatly shortened, the production cost is reduced, the operation is simple, and the technology is easy to popularize. In addition, the cutting used in the invention has completed flower bud differentiation, can bloom and become commodity in the same year after rooting and survival, solves the time problem of cutting the hydrangea tender branch into commodity marketing and selling, can maintain vigorous growth vigor and compact plant type of plants, and has important significance for promoting hydrangea industry development.
In the invention, the cutting time, the substrate, the length of the cutting and the hormone are adjusted to further optimize the cutting seedling raising method of the old branches of the hydrangea, so as to improve the rooting rate and the flowering rate of the hydrangea. Compared with the cutting method adopted in the prior art, the method for cutting and raising seedlings of the old hydrangea branch can obtain higher rooting rate and flowering rate, and the highest flowering rate in the current year can reach 77.5%.
Detailed Description
In order to more clearly understand the objects, technical solutions and advantageous effects of the present invention, the following detailed description of the technical solutions of the present invention is given by specific examples, but the scope of protection of the present invention is not limited to the following examples. Various substitutions or alternations made by those of ordinary skill in the art and conventional means are intended to be included in the scope of the present invention.
In the examples of the present invention, which are not specifically described and are accomplished by conventional molecular biological experimental methods, the processes of solution preparation and the like, which are referred to in the examples, are understood and easily accomplished by those skilled in the art based on the product specification or the basic knowledge in the art, and thus will not be described in detail.
Example 1:
the method for raising seedlings of the old hydrangea branches by cutting adopts the old hydrangea branches by cutting, selects Shi Ouni and mimosa leaves as experimental objects, and comprises the following steps:
(1) Cutting time: selecting 1-3 months each year, and setting 3 time points for each month: last ten days (5 days), middle ten days (15 days) and last ten days (25 days).
(2) Preparing a cutting matrix: peat soil, perlite, a mixture of peat soil and perlite (peat soil and perlite in a 5:1 volume ratio) 3 types of substrate were selected.
(3) Preparing a rooting agent: NAA was formulated as 150 mg.L -1 Is prepared for later use.
(4) Preparing a plug: selecting a 32-hole plug or a flat bottom seedling tray; the repeatedly used plug and seedling tray are washed or sprayed by 10% sodium hypochlorite solution, then washed by clear water for 2-3 times, and dried for use.
(5) Preparing cutting slips: selecting a hydrangea variety (such as ' Shi Ouni ' mimosa leaves ') with strong resistance and good branching property and complete flower bud differentiation; the plants with strong growth and no plant diseases and insect pests are selected, the fully lignified branches are cut into cutting slips, and the cutting slips are cut into the average lengths of 5 to 8 cm (containing 1 node band and 1 to 2 buds), 9 to 12 cm (containing 2 node bands and 3 to 4 buds), 13 to 16 cm (containing 3 node bands and 5 to 6 buds) and more than 16 cm. The sheared cuttings were soaked in NAA solution 5 s, at least 0.5 cm of the base of the cutting.
(6) Cutting: watering the plug tray filled with the matrix thoroughly before cutting, and inserting the longer cutting into the matrix by about 3 cm; for shorter cuttings, the lower part of the node is fully inserted into the matrix. Covering with fresh-keeping film for keeping moisture after cutting, and removing after 2 days.
(7) Post-insertion management: watering once in 1 week after cutting, wherein a bottom soaking mode is adopted during watering; the temperature is preferably 20 to 25 ℃.
(8) Transplanting: transplanting after rooting for 2 weeks, wherein the transplanting matrix is a mixture of peat soil and perlite (volume ratio is 5:1).
(9) And (3) managing after transplanting: watering thoroughly the root fixing water immediately after transplanting; the temperature is controlled at 20-25 ℃; the compound fertilizer is applied once a month.
In the embodiment, the influence of different treatments on rooting and flowering of old hydrangea cutting is examined by adjusting cutting time, substrate, cutting length and hormone. According to different cutting conditions, 27 groups of treatments (the treatment conditions refer to Table 1) are arranged, 30 plants are cut in each treatment, 3 times of biological repetition are arranged, and the rooting condition, growth condition and flowering condition of the old cutting of the hydrangea as different treatments are analyzed to screen proper cutting time, matrix and cutting length.
Specifically, three levels (cutting time, substrate, cutting length, and hormone) of four factors (cutting time: upper, middle, and lower ten days of each of 1 to 3 months; substrate:peat soil, perlite, peat soil and perlite mixtures; cutting length: 5 to 8, 9 to 12 and 13 to 16 cm; the hormone is 150 mg.L -1 NAA) orthogonal test to design experiments to examine the influence of different treatments on rooting and flowering of old branches of hydrangea as well as to specifically examine the results shown in Table 1.
Table 1 shows the effect of different treatments on rooting and flowering of old hydrangea branch cutting, and as can be seen from Table 1, the rooting rate of treatments 1, 5, 7, 10, 16 and 22 is higher and can reach more than 90%; in addition, treatments 1, 5, 7, 8, 10, 13, 16, 17, 19 and 22 were longer in root length (> 5 cm) and larger in root area (> 30 cm) 2 ) The whole root system is more. According to flowering-stage flowering statistics, the flowering rate of treatments 1, 2, 6, 7, 8, 10, 12, 13, 16 and 17 can reach more than 70%.
In conclusion, the treatment 1, 7, 10 and 16 has better effect, namely the cutting time is preferably 1 month to 3 months, wherein 1 month to 2 months are preferable; the cutting matrix is preferably perlite or peat soil and perlite mixture (volume ratio of the perlite to the peat soil is 5:1); the length of the cutting is preferably 5 to 8. 8 cm.
Example 2:
the method for raising seedlings of the old hydrangea branches by cutting adopts the old hydrangea branches by cutting, selects Shi Ouni and mimosa leaves as experimental objects, and comprises the following steps:
(1) Cutting time: and 1-2 months.
(2) Cutting matrix: perlite is selected as the cutting medium.
(3) Preparing a rooting agent: rooting powder (ABT), naphthalene Acetic Acid (NAA), indoleacetic acid (IAA) and indolebutyric acid (IBA) are respectively prepared into 100-mg.L -1 Wherein the present embodiment selects 100, 200, 400, mg.L -1 Four concentrations were tested and prepared for use.
(4) Preparing a plug: selecting a 32-hole tray or a flat bottom seedling tray; the repeatedly used plug and seedling tray are washed or sprayed by 10% sodium hypochlorite solution, then washed by clear water for 2-3 times, and dried for use.
(5) Preparing cutting slips: selecting a variety which has strong resistance and good branching property and has completed flower bud differentiation; selecting plants which grow robustly and have no plant diseases and insect pests. The fully lignified branches are cut as cutting shoots and cut into average lengths of 5-8 cm (1-2 shoots with 1 node band) and 9-12 cm (3-4 shoots with 2 node bands).
(6) Cutting: soaking the sheared cutting in rooting solution for 5 s, 1 min, 5 min and 10 min, wherein the solution at least submerges the base of the cutting for 0.5 cm.
(6) Cutting: watering the plug tray filled with the matrix thoroughly before cutting, and inserting the longer cutting into the matrix by about 3 cm; for shorter cuttings, the lower part of the node is fully inserted into the matrix. Covering with fresh-keeping film for keeping moisture after cutting, and removing after 2 days.
(7) Post-insertion management: watering once in 1 week after cutting, wherein a bottom soaking mode is adopted during watering; the temperature is preferably 20 to 25 ℃.
(8) Transplanting: transplanting after rooting for 2 weeks, wherein the transplanting matrix is a mixture of peat soil and perlite (volume ratio is 5:1).
(9) And (3) managing after transplanting: watering thoroughly the root fixing water immediately after transplanting; the temperature is controlled at 20-25 ℃; the compound fertilizer is applied once a month.
In this embodiment, the influence of different treatments on rooting and flowering of the old hydrangea cutting is further examined by adjusting the hormone type, the hormone concentration and the treatment time by adopting the method, so that the relevant parameters of the old hydrangea cutting cultivation method are continuously optimized on the basis of embodiment 1.
In this example, 32 groups of treatments (treatment conditions refer to table 2) are set up according to different cutting conditions, 30 plants are cut in each treatment, 3 biological repetitions are set up, and the rooting condition, growth condition and flowering condition of the old cutting of the hydrangea in different treatments are analyzed to screen proper cutting time, substrate and cutting length.
Specifically, three factors (hormone type, hormone concentration and treatment time) are employedFour levels (hormone types: ABT, NAA, IAA and IBA; concentrations: 100, 200, 400 and 600 mg.L) -1 The method comprises the steps of carrying out a first treatment on the surface of the The treatment time is as follows: 5 s, 1 min, 5 min and 10 min) to examine the influence of different treatments on rooting and flowering of old cutting of hydrangea, the length of each cutting is 16 treatments, the lengths of the cutting in treatments 1 to 16 in table 2 are 5 to 8 cm, and the lengths of the cutting in treatments 17 to 32 are 9 to 12 cm, and the specific examination results are shown in table 2.
Table 2 shows the influence of different hormone types, concentrations and treatment time on rooting and flowering of old branches of hydrangea, and as can be seen from Table 2, the rooting rate of treatments 1, 2, 3, 4, 7, 11, 12 and 16 is highest and can reach more than 90% for cutting shoots with lengths of 5-8 cm; treatments 1, 2, 3, 5, 6, 8, 9, 10, 11, 12, 14, 15 and 16 had larger surface areas (> 30 cm) 2 ) I.e. more root systems, while treatments 1, 2, 5, 11, 12, 14 and 16 were longer (> 5 cm), the other treatments were shorter in root systems; from the viewpoint of flowering rate, treatment 1, 2, 3, 5, 6, 9, 10, 11 and 16 were higher in flowering rate, and 70% or more.
Therefore, if the cutting with the length of 5-8 cm is used for cultivating the flowering products in the current year, the treatment of 1, 2, 11 and 16 can obtain the products with higher survival rate and large flowering quantity, namely, 100-200 mg.L -1 Cutting with ABT treatment length of 5-8 cm and treatment time of not more than 1 min or 400 mg.L -1 Cutting 10 s or 600 mg.L with IBA treatment length of 5-8 cm -1 The cutting 10 s with the IAA treatment length of 5-8 cm can obtain products with higher rooting rate and flowering rate.
For the cutting with the length of 9-12 cm, the rooting rate of the treatments 17, 18, 20, 25, 28 and 31 is higher and reaches more than 90 percent; treatments 18, 25, 26 and 27 were longer cuttings root length (> 5 cm) and larger root area (> 30 cm) 2 ) The flowering rate of the treatments is also high and can reach more than 65%.
Therefore, if the current year of flowering products are cultivated by using the cutting with the length of 9 to 12 cm, the treatment is carried out18 and 25 can obtain products with higher survival rate and large flowering quantity, namely 200 mg.L -1 Cutting with length of 9-12 cm for ABT treatment for 1 min or 100 mg.L -1 The cutting with the IBA treatment length of 9-12 cm can obtain products with higher rooting rate and flowering rate after 5 min.
By combining the above embodiments, the cutting time of the cultivation technology of the current year flowering product of the old hydrangea branch cutting is preferably 1-3 months, wherein 1-2 months are preferable; the cutting matrix is preferably perlite or peat soil and perlite mixture (the volume ratio of the perlite to the peat soil is 5:1); the length of the cutting is preferably 5 to 8 cm and 9 to 12 cm, wherein 5 to 8 cm are preferable; 100-200 mg.L is adopted for the cutting with the length of 5-8 cm -1 The ABT treatment time is not more than 1 min or 400 mg.L -1 IBA treatment 10 s or 600 mg.L -1 IAA treatment of 10 s is preferred, of which 100 to 200 mg.L is preferred -1 ABT 200 mg.L for cutting shoots with lengths of 9-12 cm -1 ABT treatment for 1 min or 100 mg.L -1 IBA treatment is preferably carried out for 5 min, preferably 100 mg.L -1 IBA。
The examples are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.
Claims (4)
1. The method for raising seedlings of the old branches of the hydrangea by cutting is characterized by comprising the following steps of:
(1) Preparing and treating cutting slips: selecting fully lignified branches as cutting slips, and soaking the obtained cutting slips by adopting a rooting agent to obtain treated cutting slips; the length of the cutting slip is 5-8 cm; the rooting agent has the selected concentration of 100-200 mg L -1 Is of concentration 400 mg.L -1 IBA or concentration of 600 mg.L -1 Any one of the IAAs is soaked, the ABT treatment time is not more than 1 min, and the IBA and IAA treatment time is 10 s; the fully lignified shoots are selected from the shoots which are strong in resistance, good in branching and complete in flower bud differentiation;
(2) Cutting: cutting the treated cutting slips into a matrix in the last 1 to 2 months of the year, covering and preserving moisture for a period of time, and uncovering; perlite is selected as the cutting matrix;
(3) Post-insertion management: watering after cutting, and controlling the environmental temperature;
(4) Transplanting: transplanting the rooted cutting seedlings; watering thoroughly the root fixing water after transplanting, and controlling the environmental temperature; fertilizing at regular intervals;
the transplanted substrate is a mixture of peat soil and perlite, wherein the volume ratio of the peat soil to the perlite is as follows: 5:1; the temperature is controlled to be 20-25 ℃ after the transplanting.
2. The method for raising seedlings of hydrangea macrophylla by cutting according to claim 1, wherein in the step (1), the branches are selected from plants which grow robustly and have no plant diseases and insect pests.
3. The method for raising seedlings of old hydrangea branch by cutting according to claim 1, wherein in the step (3), watering is performed after 1 week of cutting, and the environment temperature is controlled to be 20-25 ℃ by adopting a bottom soaking mode during watering.
4. Use of the method for raising seedlings of hydrangea seedlings by cutting old branches of hydrangea according to any one of claims 1-3 in raising seedlings of hydrangea varieties with flower bud differentiation completed in autumn.
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