Twig cutting propagation method for crape myrtle color leaf type variety 'Fengjin'

Abstract

The invention discloses a twig cutting propagation method for a crape myrtle color leaf type variety 'Fengjin', and belongs to the technical field of crape myrtle cutting propagation. The method comprises the steps of cutting slip collection and treatment, matrix treatment, cutting, later-stage management and protection, seedling hardening and the like, and by strictly controlling the cutting matrix and a rooting agent, managing after cutting and the like, the crape myrtle color leaf type variety 'Fengjin' is obtained. According to the method, good rooting and survival of the'paijin 'lagerstroemia indica are promoted, seedlings which grow well are obtained, the survival rate after transplanting is increased, and the method has important significance in promoting application and popularization of a new variety of lagerstroemia indica'paijin'.

Description

Technical Field

[0001] The invention relates to the technical field of crape myrtle cutting propagation, and in particular to a softwood cutting propagation method of a crape myrtle color-leaf variety "Pink Gold". Background Art

[0002] Lagerstroemia indica, also known as the itchy tree, barkless tree, 100-day red, and full house red, is a deciduous tree or shrub of the genus Lagerstroemia in the Lythraceae family. It is native to my country and has a cultivation history of more than 1,600 years. Lagerstroemia has a beautiful tree shape, smooth trunk, abundant flowers, bright colors, and a long flowering period. It is a famous summer flowering small tree in my country and even in the world. It is known as the four famous summer flowers together with lily, pomegranate, and lotus. It has a high ornamental value and has been widely used in gardens in public green spaces, residential areas, roads, and other places.

[0003] Crape myrtle usually adopts sowing propagation method and cutting propagation method. Compared with sowing propagation method, cutting propagation method has the advantages of high survival rate, fast growth rate, early flowering and high seedling production, and is more suitable for the propagation of crape myrtle. "Pink Gold" crape myrtle is a new variety of colorful leaves bred by the Institute of Botany, Chinese Academy of Sciences, Jiangsu Province. It is characterized by yellow-green leaves, light green buds, purple-red flowers, flowering period from June to August, and high ornamental value. According to literature search, it was found that the reports of crape myrtle softwood cuttings were limited to the "Red Fireball" and other regular-color leaf crape myrtle varieties. At present, there are no reports on the softwood cuttings of the colorful leaf crape myrtle variety "Pink Gold". Due to the differences between the genotypes of the varieties, blindly adopting the conventional crape myrtle variety cutting propagation method for "Pink Gold" crape myrtle cuttings is prone to low survival rate and poor seedling quality.

[0004] Therefore, there is a need to find a cutting propagation method suitable for "Pink Gold" Crape Myrtle to improve its cutting survival rate and seedling quality, and better promote the promotion and application of "Pink Gold" Crape Myrtle. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a softwood cutting propagation method for the colorful leaf type crape myrtle variety "Pink Gold" to solve the problems of low survival rate and poor seedling quality of the new variety "Pink Gold" crape myrtle under conventional cutting propagation methods.

[0006] The present invention solves the above technical problems by the following technical means:

[0007] A softwood cutting propagation method for a crape myrtle color-leaf variety "Pink Gold", the cutting propagation method comprising the following steps:

[0008] (1) Cutting collection and processing: From June to September, 1-2 year old healthy and pest-free branches were cut from the mother tree of "Pink Gold", the branches were cut into sections to obtain cuttings, and they were bundled into bundles of 30-50 branches per bundle for later use;

[0009] (2) Substrate treatment: Place the substrate into a seedling tray and then water the substrate thoroughly with 800 times diluted 50% carbendazim wettable powder;

[0010] (3) Cutting: Dip the cuttings into a rooting agent and then insert them into a seedling tray filled with a substrate;

[0011] (4) Post-management: Water thoroughly after cutting, automatically spray water to maintain the moisture content of the substrate, and set up a shade net for shading;

[0012] (5) Hardening and transplanting: When the rooting rate of the cuttings reaches 60-70%, hardening is carried out and transplanting can be carried out after hardening is completed.

[0013] Furthermore, in step (1), the branches are cut into segments with a length of 5-10 cm to obtain cuttings, and 4 buds and 1 leaf are retained on the cuttings.

[0014] Furthermore, in step (2), the matrix is ​​obtained by mixing peat and perlite in a volume ratio of 3:2.

[0015] Furthermore, the rooting agent components in step (3) are: 50-100 mg / L naphthylacetic acid + 2-3 g / L carbendazim.

[0016] Furthermore, the root dipping operation in the rooting agent in step (3) is specifically as follows: placing 1.5-3.0 cm of the base of the cutting into the rooting agent and dipping the roots for 90-100 seconds.

[0017] Furthermore, in step (3), the cuttings are planted at a depth of 1 / 2 to 2 / 3 of the length of the cuttings.

[0018] Furthermore, in step (4), water is sprayed to maintain the moisture content of the substrate at 60-70%.

[0019] Furthermore, during the later maintenance in step (4), the substrate needs to be irrigated with 800 times the dilution of 50% carbendazim wettable powder every 7-10 days.

[0020] Furthermore, in step (4), the shading rate of the sunshade net is 60-85%.

[0021] Furthermore, the seedling hardening operation in step (5) is specifically as follows:

[0022] On the 1st to 3rd day, uncover 25% of the shade net every day, on the 4th to 7th day, uncover 50% of the shade net every day, and on the 8th day, remove the shade net and allow full light treatment. The seedlings can be transplanted after a total of 10-15 days of hardening.

[0023] Beneficial effects:

[0024] The present invention adopts a softwood cutting propagation method to carry out cuttings on a new variety of "Pink Gold" crape myrtle, which has the advantages of simple operation, short propagation cycle and high seedling propagation efficiency. The method of the present invention can be used to propagate seedlings in the same year, and the survival rate reaches more than 95%. The method has important application value for the asexual propagation production of "Pink Gold" crape myrtle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 : This is a picture of the "Pink Gold" crape myrtle branches collected from the mother tree in Example 1 of the present invention;

[0026] Figure 2 : This is a picture of the rooting status of the "Pink Gold" crape myrtle cuttage in Example 1 of the present invention;

[0027] Figure 3 : It is a picture of the growth status of the "Pink Gold" crape myrtle seedlings cuttage in Example 1 of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to specific embodiments and accompanying drawings:

[0029] Embodiment 1: Softwood cutting propagation method of crape myrtle colorful leaf type variety "Pink Gold"

[0030] The components of the rooting agent used in this example are: 50 mg / L naphthaleneacetic acid + 2 g / L carbendazim

[0031] (1) Cutting collection and processing: In mid-June, two-year-old healthy and pest-free branches were cut from the mother tree of "Fenjin", and the branches were cut into segments of about 7 cm in length, with 4 buds and 1 leaf retained to obtain cuttings, which were then bundled into bundles of 30 branches for later use;

[0032] (2) Substrate treatment: Peat and perlite were mixed evenly in a volume ratio of 3:2 to obtain a substrate, which was placed in a seedling tray, and then the substrate was thoroughly irrigated with 800 times diluted 50% carbendazim wettable powder;

[0033] (3) Cutting: Dip the base of the cuttings (2.0 cm long) into the rooting agent for 95 seconds, then insert them into the seedling tray containing the substrate. The cutting depth is 1 / 2 of the cutting length.

[0034] (4) Late maintenance: After cutting, water thoroughly for the first time, and then automatically spray water to keep the moisture content of the substrate at 65%. Cover with a shade net with a shading rate of 60% for shading, and irrigate the substrate with 800 times the solution of 50% carbendazim wettable powder every 7 days;

[0035] (5) Hardening and transplanting: Hardening of the seedlings is carried out when the rooting rate of the cuttings reaches 60%. Specifically, 25% of the shade net is uncovered every day on the 1st to 3rd day, 50% of the shade net is uncovered every day on the 4th to 7th day, and the shade net is removed on the 8th day for full light treatment. The seedlings can be transplanted after 15 days of hardening.

[0036] Embodiment 2: Softwood cutting propagation method of crape myrtle colorful leaf type variety "Pink Gold"

[0037] The components of the rooting agent used in this example are: 50 mg / L naphthaleneacetic acid + 3 g / L carbendazim

[0038] (1) Cutting collection and processing: In late July, one-year-old healthy and pest-free branches were cut from the mother tree of "Fenjin", and the branches were cut into segments of about 5 cm in length, retaining 4 buds and 1 leaf to obtain cuttings, which were then bundled into bundles of 40 branches for later use;

[0039] (2) Substrate treatment: Peat and perlite were mixed evenly in a volume ratio of 3:2 to obtain a substrate, which was placed in a seedling tray, and then the substrate was thoroughly irrigated with 800 times diluted 50% carbendazim wettable powder;

[0040] (3) Cutting: Dip the base of the cutting (1.5 cm long) into the rooting agent for 100 seconds, then insert it into the seedling tray filled with substrate. The cutting depth is 1 / 2 of the cutting length.

[0041] (4) Late maintenance: After cutting, water thoroughly for the first time, and then automatically spray water to keep the moisture content of the substrate at 60%. Cover with a shade net with a shading rate of 85% for shading, and irrigate the substrate with 800 times the solution of 50% carbendazim wettable powder every 10 days;

[0042] (5) Hardening and transplanting: Hardening of the seedlings is carried out when the rooting rate of the cuttings reaches 70%. Specifically, 25% of the shade net is uncovered every day on the 1st to 3rd day, 50% of the shade net is uncovered every day on the 4th to 7th day, and the shade net is removed on the 8th day for full light treatment. The seedlings can be transplanted after a total of 10 days of hardening.

[0043] Embodiment 3: Softwood cutting propagation method of crape myrtle colorful leaf type variety "Pink Gold"

[0044] The components of the rooting agent used in this example are: 100 mg / L naphthaleneacetic acid + 3 g / L carbendazim

[0045] (1) Cutting collection and processing: In mid-September, one-year-old healthy and pest-free branches were cut from the mother tree of "Fenjin", and the branches were cut into segments of about 10 cm in length, retaining 4 buds and 1 leaf to obtain cuttings, which were then bundled into bundles of 50 branches for later use;

[0046] (2) Substrate treatment: Peat and perlite were mixed evenly in a volume ratio of 3:2 to obtain a substrate, which was placed in a seedling tray, and then the substrate was thoroughly irrigated with 800 times diluted 50% carbendazim wettable powder;

[0047] (3) Cutting: Dip the base of the cutting (3.0 cm long) into the rooting agent for 90 seconds, then insert it into the seedling tray filled with substrate. The cutting depth should be 2 / 3 of the cutting length.

[0048] (4) Late maintenance: After cutting, water thoroughly for the first time, and then automatically spray water to keep the moisture content of the substrate at 70%. Cover with a shade net with a shading rate of 75% for shading, and irrigate the substrate with 800 times the solution of 50% carbendazim wettable powder every 8 days;

[0049] (5) Hardening and transplanting: Hardening of the seedlings is carried out when the rooting rate of the cuttings reaches 70%. Specifically, 25% of the shade net is uncovered every day on the 1st to 3rd day, 50% of the shade net is uncovered every day on the 4th to 7th day, and the shade net is removed on the 8th day for full light treatment. The seedlings can be transplanted after a total of 13 days of hardening.

[0050] Comparative Example 1: Softwood Cutting Propagation Method of Lagerstroemia indica Color Leaf Variety "Pink Gold"

[0051] In contrast to Example 1, the only difference is that in the step (2) of preparing the substrate for cutting in Comparative Example 1, the volume ratio of peat and perlite is 4:2, and the remaining steps are the same as in Example 1.

[0052] Comparative Example 2: Softwood Cutting Propagation Method of Lagerstroemia indica Color Leaf Variety "Pink Gold"

[0053] In contrast to Example 1, the only difference is that in the step (2) of preparing the substrate for cutting in Comparative Example 2, the volume ratio of peat and perlite is 2:2, and the remaining steps are the same as in Example 1.

[0054] Comparative Example 3: Softwood Cutting Propagation Method of Lagerstroemia indica Color Leaf Variety "Pink Gold"

[0055] In contrast to Example 1, the only difference is that in Comparative Example 3, the substrate in step (2) is vermiculite when performing cuttings, and the remaining steps are the same as in Example 1.

[0056] Comparative Example 4: Softwood Cutting Propagation Method of Lagerstroemia indica Color Leaf Variety "Pink Gold"

[0057] In contrast to Example 1, the only difference is that the rooting agent component in step (3) during cutting in Comparative Example 4 is: 30 mg / L naphthylacetic acid + 2 g / L carbendazim, and the remaining steps are the same as in Example 1.

[0058] Comparative Example 5: Softwood Cutting Propagation Method of Lagerstroemia indica Color Leaf Variety "Pink Gold"

[0059] In contrast to Example 1, the only difference is that the rooting agent component in step (3) during cutting in Comparative Example 5 is: 120 mg / L naphthylacetic acid + 2 g / L carbendazim, and the remaining steps are the same as in Example 1.

[0060] Comparative Example 6: Softwood Cutting Propagation Method of Lagerstroemia indica Color Leaf Variety "Pink Gold"

[0061] In contrast to Example 1, the only difference is that in Comparative Example 6, the rooting agent in step (3) is 600 mg / L naphthaleneacetic acid, and the remaining steps are the same as in Example 1.

[0062] Comparative Example 7: Softwood Cutting Propagation Method of Lagerstroemia indica Color Leaf Variety "Pink Gold"

[0063] In contrast to Example 1, the only difference is that in step (4) of comparative example 7, water is sprayed to maintain the moisture content of the substrate at 55% during the cutting. The remaining steps are the same as those in Example 1.

[0064] Comparative Example 8: Softwood Cutting Propagation Method of Lagerstroemia indica Color Leaf Variety "Pink Gold"

[0065] In contrast to Example 1, the only difference is that in step (4) of Comparative Example 8, the shading rate of the shading net is 50% during the cutting, and the remaining steps are the same as in Example 1.

[0066] Comparative Example 9: Softwood Cutting Propagation Method of Lagerstroemia indica Color Leaf Variety "Pink Gold"

[0067] In contrast to Example 1, the only difference is that in Comparative Example 9, when cuttings are carried out, the matrix is ​​vermiculite, the rooting agent is 600 mg / L naphthaleneacetic acid, and the remaining steps are the same as in Example 1, as shown below:

[0068] (1) Same as Example 1;

[0069] (2) Substrate treatment: Place the vermiculite substrate into the seedling tray, and then water the substrate thoroughly with 800 times diluted 50% carbendazim wettable powder;

[0070] (3) Cutting: Dip the base of the cuttings (2.0 cm long) into a 600 mg / L naphthaleneacetic acid solution for 95 seconds, then insert the cuttings into a seedling tray containing a substrate. The cutting depth is 1 / 2 of the cutting length.

[0071] (4)-(5) are the same as in Example 1.

[0072] Experiment: One bundle of cuttings was used for each group of Examples 1-3 and Comparative Examples 1-8 (i.e., 30 cuttings were used for Example 1 and Comparative Examples 1-8; 40 cuttings were used for Example 2; and 50 cuttings were used for Example 3). After the hardening was completed, the survival rate of the cuttings in each group was counted, and the data obtained were shown in Table 1:

[0073] Table 1

[0074]

[0075] According to the data in Table 1:

[0076] (1) According to the method of the present invention, the new variety "Pink Gold" crape myrtle is propagated by softwood cuttings, and the survival rate after hardening can reach more than 96%; Comparative Examples 1-2 change the ratio of peat and perlite in the cutting medium, thereby affecting the air permeability and nutrient content of the medium, and reducing the survival rate. Under the preparation of peat:perlite=3:2 of the present invention, the survival rate of "Pink Gold" crape myrtle is high; In Comparative Example 3, the medium is replaced with vermiculite, and the survival rate is reduced, indicating that the medium under conventional crape myrtle cuttings cannot better guarantee the survival of the cuttings of "Pink Gold" crape myrtle;

[0077] (2) In Comparative Examples 4 and 5, the survival rate was reduced after the concentration of naphthaleneacetic acid in the rooting agent was changed. In Comparative Example 6, the survival rate was also reduced after the treatment with 600 mg / L naphthaleneacetic acid alone according to the conventional method, indicating that the concentration of naphthaleneacetic acid has an effect on the cuttings of "Pink Gold" Crape Myrtle; in Comparative Example 7, the survival rate was reduced when the moisture content of the substrate was kept at 55% and in Comparative Example 8, the shading rate was only 50%, indicating that moisture and light have an important influence on the survival rate of "Pink Gold" Crape Myrtle cuttings, and maintaining appropriate moisture content and light can better improve the survival rate of cuttings; in Comparative Example 9, the survival rate of "Pink Gold" Crape Myrtle was significantly reduced when the substrate and rooting agent of the conventional cutting method were used, indicating that the method of the present invention is suitable for the cutting propagation of "Pink Gold" Crape Myrtle, can better ensure the survival of cutting seedlings, and is of great significance to promoting the popularization and application of the new variety of Crape Myrtle "Pink Gold".

[0078] 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 known technologies.

Claims

1. A softwood cutting propagation method for the colorful leaf variety "Pink Gold" of Lagerstroemia indica, characterized in that: The cutting propagation method comprises the following steps: (1) Cutting collection and processing: Cut 1-2 year old branches from the "Pink Gold" mother tree from June to September, cut the branches into sections to obtain cuttings, and tie them into bundles of 30-50 branches / bundle for later use; (2) Substrate treatment: Place the substrate into a seedling tray and then water the substrate thoroughly with 800 times diluted 50% carbendazim wettable powder; (3) Cutting: Dip the cuttings into a rooting agent and then insert them into a seedling tray filled with a substrate; (4) Post-management: Water thoroughly after cutting, automatically spray water to maintain the moisture content of the substrate, and set up a shade net for shading; (5) Hardening and transplanting: When the rooting rate of the cuttings reaches 60-70%, hardening is carried out and transplanting can be carried out after hardening is completed.

2. The softwood cutting propagation method of a crape myrtle colorful leaf variety "Pink Gold" according to claim 1, characterized in that: In the step (1), the branches are cut into segments with a length of 5-10 cm to obtain cuttings.

3. The softwood cutting propagation method of a crape myrtle color leaf variety "Pink Gold" according to claim 2, characterized in that: In the step (2), the substrate is obtained by mixing peat and perlite in a volume ratio of 3:

2.

4. The softwood cutting propagation method of a crape myrtle color leaf variety "Pink Gold" according to claim 3, characterized in that: The rooting agent components in step (3) are: 50-100 mg / L naphthyl acetic acid + 2-3 g / L carbendazim.

5. The softwood cutting propagation method of a crape myrtle color leaf variety "Pink Gold" according to claim 4, characterized in that: The specific operation of dipping the roots in the rooting agent in step (3) is: placing the base 1.5-3.0 cm of the cuttings into the rooting agent and dipping the roots for 90-100 seconds.

6. The softwood cutting propagation method of a crape myrtle color leaf variety "Pink Gold" according to claim 5, characterized in that: In the step (3), the cuttings are planted at a depth of 1 / 2 to 2 / 3 of the length of the cuttings.

7. The softwood cutting propagation method of the colorful-leaf variety "Pink Gold" of Lagerstroemia indica according to claim 6, characterized in that: In step (4), water is sprayed to maintain the moisture content of the substrate at 60-70%.

8. The softwood cutting propagation method of the colorful-leaf variety "Pink Gold" of Lagerstroemia indica according to claim 7, characterized in that: During the later maintenance in step (4), the substrate needs to be irrigated with 800 times the solution of 50% carbendazim wettable powder every 7-10 days.

9. The softwood cutting propagation method of the colorful-leaf variety "Pink Gold" of Lagerstroemia indica according to claim 8, characterized in that: The shading rate of the sunshade net in step (4) is 60-85%.

10. The softwood cutting propagation method of the colorful-leaf variety "Pink Gold" of Lagerstroemia indica according to claim 9, characterized in that: The seedling hardening operation in step (5) is specifically as follows: On the 1st to 3rd day, uncover 25% of the shade net every day, on the 4th to 7th day, uncover 50% of the shade net every day, and on the 8th day, remove the shade net and allow full light treatment. The seedlings can be transplanted after a total of 10-15 days of hardening.

Images