Propagation method of sympodial bamboos

Abstract

The invention discloses a sympodial bamboo propagation method, and belongs to the technical field of cutting propagation, and the method comprises the following steps: (1) selecting a fertile sandy soil nursery with good illumination, turning over, applying decomposed farmyard manure, disinfecting the soil with a 1% potassium permanganate solution, and digging a seedling raising ditch in the soil, the ditch depth being 15-18cm and the ditch width being 20-22cm; (2) selecting a sympodial bamboo main branch of 2-3 years old, retaining a branch stump and three knots on the branch stump to obtain a cutting, applying the accelerant A to the branch stump of the cutting, standing for 4-5 days, and spraying the accelerant B during the period to obtain a treated cutting; (3) in the first ten days of April, the treated cuttings are obliquely inserted into a nursery garden by 45 degrees; and (4) performing weeding and topdressing in April to May and July to August in the next year. The problem of low cutting survival rate caused by slow development of sympodial bamboo latent buds is solved.

Description

Technical Field

[0001] The invention relates to the technical field of cutting propagation, in particular to a propagation method for clumping bamboo. Background Art

[0002] Clumping bamboo is an important component of my country's bamboo resources. It refers to bamboo species in which multiple bamboo plants grow densely from the same place or roots to form a clump. It includes species such as Bambusa, Phyllostachys, and Bambusa. Clumping bamboo is an important bamboo forest resource, widely distributed in the area south of the Yangtze River. It has tall culms, high biomass, rapid growth, and significant carbon sequestration capacity, making it very suitable for afforestation. With the improvement of environmental awareness and the threat of global warming, people have begun to pay attention to how to reduce greenhouse gas emissions. Due to its growth characteristics, clumping bamboo is considered an effective emission reduction tool. Therefore, how to use the advantages of clumping bamboo to build bamboo forest carbon sinks is a current hot topic. Clumping bamboo is often propagated by cutting seedlings. The method is simple, the raw materials are easily available, the propagation speed is fast, the seedling raising time is short, and it is suitable for large-scale seedling raising. The clumping bamboo branch cutting propagation uses the latent buds at the root of the clumping bamboo branch as the propagation material, and forms a complete bamboo seedling by inducing the root of the branch to take root and shoot. However, the latent buds of clumping bamboo are slow to develop and grow slowly, which makes it difficult for the clumping bamboo branch cuttings to take root. Currently, the main method is to soak the cuttings in a rooting agent before cutting to promote the rooting of the cuttings, but the effect after treatment is not very ideal, and the rooting time required for the cuttings is relatively long.

[0003] Therefore, the present invention provides a propagation method for clumping bamboo, which promotes the development and growth of latent buds of clumping bamboo cuttings, promotes the rooting of cuttings, and improves the survival rate of cuttings. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a propagation method for clumping bamboo, so as to solve the problem of low survival rate of cuttings caused by delayed development of latent buds of clumping bamboo.

[0005] The present invention solves the above technical problems by the following technical means:

[0006] A method for propagating clumping bamboo, the method comprising the following steps:

[0007] (1) Select a nursery with good light and fertile sandy loam, clear the weeds on the nursery land, and then plow it. After plowing, apply decomposed farmyard manure at an amount of 50-60 kg / mu, disinfect the soil with 1% potassium permanganate solution, and dig a seedling cultivation trench in the soil with a depth of 15-18 cm and a width of 20-22 cm;

[0008] (2) selecting a main branch with a branch stump on a 2-3 year old bamboo plant that is healthy and free of pests and diseases as a cutting, removing excess branches and leaves on the bamboo branch, retaining the branch stump and three nodes thereon, obtaining a cutting, and then evenly applying a promoter to the branch stump of the cutting, and then leaving the cutting to stand for 4-5 days, during which time barium hydroxide solution is sprayed regularly to obtain a treated cutting;

[0009] (3) In early April, the treated cuttings were inserted into the nursery at an angle of 45°, with a row spacing of 40 × 50 cm, leaving the third section of the bamboo branches exposed to the ground, and then covered with soil around the cuttings and compacted;

[0010] (4) In April-May and July-August of the second year, weed control and apply top dressing with 2-3 kg of decomposed farmyard manure per clump.

[0011] Furthermore, the breeding method is applicable to clumping bamboos of the genera Bambusa, Phyllostachys and Phyllostachys.

[0012] Furthermore, the amount of the promoter used in step (2) is 20-25 g / plant.

[0013] Furthermore, the method for using the barium hydroxide solution in step (2) is as follows: spraying begins 5 hours after the cuttings are coated with the accelerator, and spraying is performed once every 5 hours, with the amount of each spraying being 10-15 ml / plant, until the static treatment is completed.

[0014] Furthermore, the raw materials of the accelerator are as follows: ammonium chloride particles, sodium silicate, glutamine, polyvinyl alcohol, and xanthan gum.

[0015] Furthermore, the mass ratio of ammonium chloride particles, sodium silicate, glutamine, polyvinyl alcohol and xanthan gum in the accelerator is (8-10): (1.2-1.5): (1-1.5): (2-3): (2-2.5).

[0016] Further, the preparation method of the accelerator is:

[0017] Add polyvinyl alcohol to water, heat and stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution, then add xanthan gum, sodium silicate and glutamine to the polyvinyl alcohol solution, stir evenly and cool to room temperature, then add ammonium chloride particles and mix evenly to obtain an accelerator.

[0018] Furthermore, the particle size of the ammonium chloride particles in the accelerator is 2-4 mm.

[0019] Furthermore, the concentration of the barium hydroxide solution is 2 wt %.

[0020] After adding ammonium chloride particles into the accelerator, they will begin to dissolve and absorb heat, causing the temperature of the accelerator to drop. Then, the accelerator is applied to the cuttings to completely wrap the cuttings, so that the cuttings are in a low-temperature environment. The three-dimensional network structure formed by xanthan gum and polyvinyl alcohol in the accelerator will limit the diffusion of water molecules, thereby slowing down the dissolution rate of ammonium chloride particles, so that the ammonium chloride particles can provide low temperature for the cuttings for a longer period of time. After the ammonium chloride is dissolved to saturation, the temperature of the accelerator wrapping the cuttings begins to rise slowly, and then barium hydroxide solution is sprayed. The barium hydroxide in the barium hydroxide solution enters the accelerator and reacts with the dissolved ammonium chloride, which can absorb a large amount of heat and cause the temperature to drop. After the water in the barium hydroxide solution enters the accelerator, it will continue to dissolve the ammonium chloride particles that were not completely dissolved before, causing the temperature to drop. When the reaction is complete, the temperature will rise again, thereby achieving the effect of variable temperature treatment of the cuttings. Temperature-variable treatment of cuttings can effectively stimulate the production of gibberellins in cuttings, thereby removing the inhibitory effect of inhibitory substances on the development of latent buds, promoting latent buds to break dormancy, and shortening the time required for rooting; in addition, temperature-variable treatment can also promote the metabolism of cuttings, promote the development and growth of latent buds of cuttings, and promote the rooting of cuttings. The sodium silicate in treatment agent A is mixed with polyvinyl alcohol and xanthan gum, which can effectively increase the density and viscosity of treatment agent A, reduce the speed of heat exchange between the promoter and the outside world, prolong the temperature holding time in the promoter, and slow down the temperature change rate, thereby promoting the adaptation of cuttings in a variable temperature environment. At the same time, the reaction of barium hydroxide solution with ammonium chloride in the promoter will generate ammonia, which is dissolved in the promoter to form ammonia water, providing nitrogen elements for cuttings and promoting the growth and development of the root system of cuttings. In addition, glutamine in the promoter can promote the accumulation of substances in latent buds, thereby promoting the growth and development of latent buds, further promoting the rooting of cuttings, and improving the survival rate of cuttings.

[0021] Beneficial effects:

[0022] The present invention can form a variable temperature environment to treat clumping bamboo cuttings by using a promoter and a barium hydroxide solution in combination, effectively breaking the dormancy of hidden buds at the branch pockets of clumping bamboo cuttings, promoting the development and growth of hidden buds, and then promoting the rooting of cuttings, shortening the rooting time required for cuttings, and improving the survival rate of clumping bamboo cuttings. Therefore, the present invention can effectively improve the reproduction efficiency of clumping bamboo and promote progress in the field of clumping bamboo reproduction. In addition, promoting the reproduction of clumping bamboo can effectively improve the carbon fixation capacity of bamboo forests, promote the sustainable development of forests, and increase the stability of ecosystems. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to specific embodiments:

[0024] Embodiment 1:

[0025] Preparation of accelerator:

[0026] Add 2 g of polyvinyl alcohol to 100 g of water, heat and stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution, then add 2 g of xanthan gum, 1.2 g of sodium silicate, and 1 g of glutamine to the polyvinyl alcohol solution, stir evenly and cool to room temperature, then add 8 g of ammonium chloride particles of about 2 mm, mix evenly to obtain a promoter.

[0027] How to propagate clumping bamboo:

[0028] (1) Select a nursery with good light and fertile sandy loam, clear the weeds on the nursery land, and then plow it. After plowing, apply 50 kg / mu of decomposed farmyard manure, disinfect the soil with 1% potassium permanganate solution, and dig a seedling cultivation trench in the soil with a depth of 15 cm and a width of 20 cm;

[0029] (2) Select the main branches with branches and stumps on two-year-old bamboo plants that are healthy and free of pests and diseases as cuttings, remove the excess branches and leaves on the bamboo branches, retain the branches and stumps and three nodes thereon, and obtain cuttings, and then evenly apply the promoter to the branches and stumps of the cuttings, the application amount is 20g / plant, and after the cuttings are treated with the promoter for 5 hours, start spraying 2wt% barium hydroxide solution, spray once every 5 hours, and the amount of each spraying is 10ml / plant, and the cuttings are left to stand for 4 days to obtain treated cuttings;

[0030] (3) In early April, the treated cuttings were inserted into the nursery at an angle of 45°, with a row spacing of 40 × 50 cm, leaving the third section of the bamboo branches exposed to the ground, and then covered with soil around the cuttings and compacted;

[0031] (4) In April and July of the second year, weed control and apply top dressing with 2 kg of decomposed farmyard manure per clump.

[0032] Embodiment 2:

[0033] Preparation of accelerator:

[0034] Add 2.5 g of polyvinyl alcohol to 125 g of water, heat and stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution, then add 2.25 g of xanthan gum, 1.35 g of sodium silicate, and 1.25 g of glutamine to the polyvinyl alcohol solution, stir evenly and cool to room temperature, then add 9 g of ammonium chloride particles of about 3 mm, mix evenly to obtain a promoter.

[0035] How to propagate clumping bamboo:

[0036] (1) Select a nursery with good light and fertile sandy loam, clear the weeds on the nursery land, and then plow it. After plowing, apply 55 kg / mu of decomposed farmyard manure, disinfect the soil with 1% potassium permanganate solution, and dig a seedling cultivation trench in the soil with a depth of 16 cm and a width of 21 cm;

[0037] (2) Select the main branches with branches and stumps on two-year-old bamboo plants that are healthy and free of pests and diseases as cuttings, remove the excess branches and leaves on the bamboo branches, retain the branches and stumps and three nodes thereon, and obtain cuttings, and then evenly apply the promoter to the branches and stumps of the cuttings, the application amount is 22g / plant, and after the cuttings are treated with the promoter for 5 hours, start spraying 2wt% barium hydroxide solution, spray once every 5 hours, and the amount of each spraying is 12ml / plant, and the cuttings are left to stand for 4 days to obtain treated cuttings;

[0038] (3) In early April, the treated cuttings were inserted into the nursery at an angle of 45°, with a row spacing of 40 × 50 cm, leaving the third section of the bamboo branches exposed to the ground, and then covered with soil around the cuttings and compacted;

[0039] (4) In April and July of the second year, weed control and apply top dressing with 2.5 kg of decomposed farmyard manure per clump.

[0040] Embodiment 3:

[0041] Preparation of accelerator:

[0042] Add 3 g of polyvinyl alcohol to 150 g of water, heat and stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution, then add 2.5 g of xanthan gum, 1.5 g of sodium silicate, and 1.5 g of glutamine to the polyvinyl alcohol solution, stir evenly and cool to room temperature, then add 10 g of ammonium chloride particles of about 4 mm, mix evenly to obtain a promoter.

[0043] How to propagate clumping bamboo:

[0044] (1) Select a nursery with good light and fertile sandy loam, clear the weeds on the nursery land, and then plow it. After plowing, apply 60 kg / mu of decomposed farmyard manure, disinfect the soil with 1% potassium permanganate solution, and dig a seedling cultivation trench in the soil with a depth of 18 cm and a width of 22 cm;

[0045] (2) Selecting a main branch with a branch stump on a two-year-old bamboo plant that is healthy and free of pests and diseases as a cutting, removing excess branches and leaves on the bamboo branch, retaining the branch stump and three nodes thereon, and obtaining a cutting, and then applying an accelerator evenly to the branch stump of the cutting, the amount of which is 25 g / plant, and starting to spray a 2 wt % barium hydroxide solution 5 hours after the cutting is treated with the accelerator, spraying once every 5 hours, and the amount of each spraying is 15 ml / plant, and the cutting is left to stand for 5 days to obtain a treated cutting;

[0046] (3) In early April, the treated cuttings were inserted into the nursery at an angle of 45°, with a row spacing of 40 × 50 cm, leaving the third section of the bamboo branches exposed to the ground, and then covered with soil around the cuttings and compacted;

[0047] (4) In April and July of the second year, weed control and apply top dressing with 3 kg of decomposed farmyard manure per clump.

[0048] Comparative Example 1:

[0049] This comparative example is in contrast to Example 1, the only difference being that the raw materials of the accelerator are different, specifically, no ammonium chloride particles are added, and the specific method is as follows:

[0050] Add 2 g of polyvinyl alcohol to 100 g of water, heat and stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution, then add 2 g of xanthan gum, 1.2 g of sodium silicate, and 1 g of glutamine to the polyvinyl alcohol solution, stir evenly and cool to room temperature to obtain a promoter.

[0051] The clumping bamboo propagation method of this comparative example is the same as that of Example 1.

[0052] Comparative Example 2:

[0053] This comparative example is in contrast to Example 1, the only difference being that the raw materials of the accelerator are different, specifically, sodium silicate is not added, and the specific method is as follows:

[0054] Add 2 g of polyvinyl alcohol to 100 g of water, heat and stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution, then add 2 g of xanthan gum and 1 g of glutamine to the polyvinyl alcohol solution, stir evenly and cool to room temperature, then add 8 g of ammonium chloride particles of about 2 mm, mix evenly to obtain a promoter.

[0055] The clumping bamboo propagation method of this comparative example is the same as that of Example 1.

[0056] Comparative Example 3:

[0057] This comparative example is in contrast to Example 1, the only difference being that the raw material method of the accelerator is different, specifically, glutamine is not added, and the specific method is as follows:

[0058] Add 2 g of polyvinyl alcohol to 100 g of water, heat and stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution, then add 2 g of xanthan gum and 1.2 g of sodium silicate to the polyvinyl alcohol solution, stir evenly and cool to room temperature, then add 8 g of ammonium chloride particles of about 2 mm, mix evenly to obtain a promoter.

[0059] The clumping bamboo propagation method of this comparative example is the same as that of Example 1.

[0060] Comparative Example 4:

[0061] This comparative example is in contrast to Example 1, the only difference being that barium hydroxide is directly added to the treating agent A. The specific method is as follows:

[0062] Add 2 g of polyvinyl alcohol to 100 g of water, heat and stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution, then add 2 g of xanthan gum, 1.2 g of sodium silicate, 1 g of glutamine, and 2 g of barium hydroxide to the polyvinyl alcohol solution, stir evenly and cool to room temperature, then add 8 g of ammonium chloride particles of about 2 mm, mix evenly to obtain a promoter.

[0063] The clumping bamboo propagation method of this comparative example is the same as that of Example 1.

[0064] experiment:

[0065] How to propagate clumping bamboo:

[0066] (1) Select a nursery with good light and fertile sandy loam, clear the weeds on the nursery land, then plow it, apply 50 kg / mu of decomposed farmyard manure, disinfect the soil with 1% potassium permanganate solution, and dig a seedling cultivation trench in the soil with a depth of 15 cm and a width of 20 cm;

[0067] (2) Select the main branches with branches and stumps on two-year-old bamboo plants that are healthy and free of pests and diseases as cuttings, remove the excess branches and leaves on the bamboo branches, retain the branches and stumps and three nodes thereon, and obtain cuttings, and then evenly apply the promoter to the branches and stumps of the cuttings, the application amount is 20g / plant, and after the cuttings are treated with the promoter for 5 hours, start spraying 2wt% barium hydroxide solution, spray once every 5 hours, and the amount of each spraying is 10ml / plant, and the cuttings are left to stand for 4 days to obtain treated cuttings;

[0068] (3) In early April, the treated cuttings were inserted into the nursery at an angle of 45°, with a row spacing of 40 × 50 cm, leaving the third section of the bamboo branches exposed to the ground, and then covered with soil around the cuttings and compacted;

[0069] (4) In April and July of the second year, weed control and apply top dressing with 2 kg of decomposed farmyard manure per clump.

[0070] Referring to the above method, conduct the following experiment:

[0071] 1. Experimental group 1 used the accelerator prepared in Example 1;

[0072] 2. Comparative groups 1-3 used the accelerators prepared in comparative examples 1-3;

[0073] 3. Comparative Group 4 used the accelerator prepared in Comparative Example 4, and did not spray the barium hydroxide solution. The specific step (2) was as follows:

[0074] Select the main branches with branches and stumps on two-year-old bamboo plants that are healthy and pest-free as cuttings, remove the excess branches and leaves on the bamboo branches, retain the branches and stumps and three nodes thereon, and obtain cuttings, then evenly apply the accelerator to the branches and stumps of the cuttings, the amount of application is 20g / plant, and the cuttings are left to stand for 4 days to obtain treated cuttings;

[0075] 4. Comparative group 5 used the promoter prepared in experimental group 1, wherein the promoter was used in an amount of 10 g / plant. The specific step (2) was as follows:

[0076] Select the main branches with branches and stumps on the two-year-old bamboo plants with strong growth and no diseases and insect pests as cuttings, remove the excess branches and leaves on the bamboo branches, retain the branches and stumps and 3 nodes thereon, and obtain cuttings, and then evenly apply the promoter to the branches and stumps of the cuttings, the application amount is 10g / plant, and after the cuttings are treated with the promoter for 5 hours, start spraying 2wt% barium hydroxide solution, spray once every 5 hours, and the amount of each spraying is 10ml / plant, and the cuttings are left to stand for 4 days to obtain treated cuttings;

[0077] 5. Control group 6 did not use barium hydroxide solution;

[0078] 6. For the control group 7, the cuttings were placed under low temperature treatment and then treated at room temperature. The specific steps (2) are as follows:

[0079] Select the main branches with branches and stumps on two-year-old bamboo plants that are healthy and free of diseases and insect pests as cuttings, remove the excess branches and leaves on the bamboo branches, retain the stumps and three nodes on them, and obtain cuttings. Place the cuttings in an environment of 10°C for treatment and then treat them at room temperature. Each treatment is 5 hours apart, and the treatment lasts for 4 days in total to obtain the treated cuttings.

[0080] 7. No treatment was performed on the cuttings in the blank group.

[0081] The experimental field was divided into 9 experimental plots, each with an equal area. 50 plants were cut in each experimental group, and the experiment was repeated three times. The rooting time of the cuttings was counted after cutting, and the survival rate of the cuttings was recorded one month after cutting. The results are shown in Table 1. One year after cutting, 20 plants were randomly selected from each experimental group to count their plant heights, and the results were averaged. The results are shown in Table 1.

[0082] Table 1

[0083] Rooting time (d) Survival rate (%) Plant height(m) Experimental Group 1 12 88 5.04 Comparison group 1 20 70.67 4.25 Comparison group 2 15 80 4.71 Comparison group 3 15 80.67 4.76 Comparison group 4 19 72.67 4.32 Comparison group 5 16 77.67 4.59 Comparison group 6 18 74.67 4.4 Comparison group 7 17 76.33 4.47 Blank group 23 64 4.04

[0084] Analyzing Table 1, we can get:

[0085] 1. Compared with experimental group 1, the difference between control groups 1-3 lies in the different raw materials of the accelerator. Comparison group 1 did not add ammonium chloride particles, and comparison group 1 could not lower the temperature to treat the cuttings at low temperature. Therefore, the hidden buds on the cuttings of comparison group 1 developed slowly, resulting in slow rooting, which affected the survival and growth of the cuttings. Therefore, the cuttings of comparison group 1 had a longer rooting time, a lower survival rate, and a lower plant height. Compared with experimental group 1, comparison group 2 did not add sodium silicate. Sodium silicate can increase the density and viscosity of the accelerator and reduce the diffusion of energy in the accelerator to the environment, so that the low temperature in the accelerator can be maintained for a longer time. However, comparison group 2 did not add sodium silicate, and the temperature change rate was faster, resulting in poor adaptation of the cuttings in the variable temperature environment, affecting the growth of the hidden buds of the cuttings, resulting in poor rooting time and low survival rate of the cuttings. Compared with experimental group 1, comparison group 3 did not add glutamine to the accelerator, and the growth and development of the hidden buds was slower, resulting in a longer rooting time, a lower survival rate of the cuttings, and a lower plant height.

[0086] 3. Compared with experimental group 1, in control group 4, barium hydroxide was directly added to treatment agent A. After the accelerator was applied to the cuttings, the barium hydroxide directly reacted with the ammonium chloride particles, resulting in the complete reaction of the ammonium chloride particles in the early stage. The temperature change amplitude in the subsequent accelerator was reduced, resulting in the inability to effectively break the dormancy of the latent buds at the branch pockets of the cuttings, slow growth, and a long rooting time. In addition, the barium hydroxide directly added to the accelerator A will come into direct contact with the cuttings, causing damage to the cuttings, resulting in a low survival rate of the cuttings.

[0087] 4. The amount of promoter used in comparison group 5 was 10g / plant. The amount of promoter used was small, resulting in a small temperature change, which could not effectively stimulate the latent buds of the cuttings to break dormancy, resulting in a longer rooting time for the cuttings and a lower survival rate.

[0088] 5. Compared with experimental group 1, control group 6 did not spray barium hydroxide solution. The dissolution of ammonium chloride particles could provide a low-temperature environment for the cuttings in the early stage, promoting the latent buds of the cuttings to break dormancy. However, it was unable to continue to provide a low-temperature environment for the cuttings, resulting in a longer rooting time and a lower survival rate.

[0089] 6. Compared with experimental group 1, control group 7 placed the cuttings as a whole under low temperature treatment and then treated at room temperature. The temperature change rate of the cuttings was faster, and the cuttings could not respond quickly to temperature changes, which affected the growth of latent buds, resulting in a decrease in the survival rate of the cuttings, affected growth and development, and a lower plant height.

[0090] 7. Compared with experimental group 1, the blank group was not treated, and the latent buds of the cuttings developed slowly and grew slowly, which made it difficult for the clumping bamboo branches to take root, the rooting time was long, and the survival rate was low. Therefore, it was shown that the combined use of promoting A and barium hydroxide solution prepared in experimental group 1 can effectively promote the rooting of cuttings and improve the survival rate of cuttings.

[0091] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention. The techniques, shapes, and structural parts not described in detail in the present invention are all well-known technologies.

Claims

1. A method for propagating clumping bamboo, characterized in that: The method comprises the following steps: (1) Select a nursery with good light and fertile sandy loam, plow the soil, apply decomposed farmyard manure, disinfect the soil with 1% potassium permanganate solution, and dig a seedling cultivation trench in the soil with a depth of 15-18 cm and a width of 20-22 cm; (2) selecting a main branch with a branch stump on a 2-3 year old bamboo plant, retaining the branch stump and three nodes thereon, obtaining a cutting, applying a promoter to the branch stump of the cutting, leaving it to stand for 4-5 days, spraying a barium hydroxide solution during this period, and obtaining a treated cutting; (3) In early April, the treated cuttings were inserted into the nursery at a 45° angle; (4) Weeding and top dressing should be carried out in April-May and July-August of the second year.

2. The method for propagating clumping bamboo according to claim 1, characterized in that: The breeding method is applicable to clumping bamboos of the genera Bambusa, Phyllostachys and Phyllostachys.

3. The method for propagating clumping bamboo according to claim 2, characterized in that: The amount of the promoter used in step (2) is 20-25 g / plant.

4. The method for propagating clumping bamboo according to claim 3, characterized in that: The method of using the barium hydroxide solution in step (2) is: start spraying the cuttings 5 ​​hours after applying the accelerator, spray once every 5 hours, and spray 10-15 ml / plant each time until the static treatment is completed.

5. The method for propagating clumping bamboo according to claim 4, characterized in that: The raw materials of the accelerator are as follows: ammonium chloride particles, sodium silicate, glutamine, polyvinyl alcohol, and xanthan gum.

6. A method for propagating clumping bamboo according to claim 5, characterized in that: The mass ratio of ammonium chloride particles, sodium silicate, glutamine, polyvinyl alcohol and xanthan gum in the accelerator is (8-10): (1.2-1.5): (1-1.5): (2-3): (2-2.5).

7. A method for propagating clumping bamboo according to claim 6, characterized in that: The preparation method of the accelerator is: Add polyvinyl alcohol to water, heat and stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol solution, then add xanthan gum, sodium silicate and glutamine to the polyvinyl alcohol solution, stir evenly, cool the solution to room temperature, add ammonium chloride particles, and mix evenly to obtain an accelerator.

8. A method for propagating clumping bamboo according to claim 7, characterized in that: The particle size of the ammonium chloride particles in the accelerator is 2-4 mm.

9. A method for propagating clumping bamboo according to claim 8, characterized in that: The concentration of the barium hydroxide solution is 2 wt %.