Container cutting seedling raising method for idesia polycarpa

Abstract

The invention discloses an idesia container cutting seedling raising method, which relates to the technical field of plant cultivation, and mainly comprises the following steps: cutting time determination, seedling raising substrate preparation, cutting slip selection, cutting slip treatment, cutting, container placement and post-cutting management. According to the method, factors such as different cutting periods, cutting slip thicknesses and cutting slip types are systematically studied, a technical combination most suitable for idesia container cutting seedling raising is optimized, a sunshade does not need to be built, complex operations such as cutting slip and substrate disinfection and rooting promotion are not needed, labor waste is avoided through reasonable selection of the cutting time, and a set of efficient and low-cost cutting seedling raising method is established. And the asexual propagation method for idesia polycarpa is low in cost. The method not only provides a feasible industrial seedling raising technology for asexual propagation of the idesia polycarpa, but also has important practical significance for popularization of improved varieties of the idesia polycarpa and industrial quality and efficiency improvement.

Description

Technical Field

[0001] The invention relates to the technical field of tree asexual propagation, and in particular to a container cutting seedling raising method for Castanopsis chinensis. Background Art

[0002] Idesia polycarpa Maxim., also known as mountain sycamore, half-frost red, and oil grape, is a deciduous tree in the family Idesiaceae. It is highly adaptable and grows very quickly, beginning to flower and bear fruit 3-5 years after planting. Its peak productive period lasts for 30-40 years, and can even reach a century. Its fruit is rich in linoleic acid, linolenic acid, unsaturated fatty acids, and other trace elements, effectively improving blood lipids and thrombosis. It is a natural woody edible oil known as the "oil depot on the tree." The flesh accounts for 62.3% of the total fruit mass, while the seeds make up 37.6%. The whole dried fruit has an oil content of 35.0% to 39.36%, with an average oil content of 36.71%. It has a wide range of applications in food, healthcare, pharmaceuticals, and industrial oils, and holds promising market prospects.

[0003] Currently, the main propagation methods for Castanopsis chinensis in my country include seed propagation, grafting, and cuttings. Although seed propagation is relatively simple to operate, it requires a large number of seeds of high-quality varieties and is susceptible to frost damage in winter. The resulting seedlings are difficult to maintain the excellent traits of the parent plants, limiting its application. Although grafting can improve propagation efficiency and fruit quality, it is technically difficult, costly, and has a high risk of disease. Therefore, it should be selected and applied with caution according to the actual situation. In contrast, cuttings have the advantages of simple operation, low cost, and easy large-scale production. It can better maintain the excellent traits of the parent plants and is a more ideal propagation method. However, existing cutting propagation technology for Castanopsis truncatum still has some shortcomings, such as: the seedling raising season is limited, mostly in spring and summer (March to August), which leads to labor shortages; the survival rate of cuttings is low; the cost of raising seedlings is high; the root system is poorly developed, and the growth is slow after survival; the production cycle is long and the seedlings are susceptible to pests and diseases; measures such as the construction of shade nets are required, and the cuttings and substrate need to be disinfected and rooted, which are complex operations. Further optimization and improvement are urgently needed. How to achieve rapid propagation of Castanopsis truncatum, low cost, strong growth, and an industrialized seedling raising method is an urgent problem to be solved in the field of artificial cultivation and propagation of Castanopsis truncatum. The present invention relates to a container-based cutting seedling raising technology for Castanopsis chinensis. Traditionally, cuttings are usually carried out from March to August and require drug treatment and the construction of a sunshade net, otherwise the survival rate is significantly reduced. For example, in Example 1, the survival rate of untreated cuttings in early March is only 47.5%, which is 45.5% lower than that of the traditional treatment method (93%). However, the Castanopsis chinensis seedlings of the present invention, which are cut in early January and do not require drug treatment or the construction of a sunshade net, have a survival rate of up to 81.9%. Although the survival rate is slightly lower than that of the traditional treatment method, the cost can be doubled, and the method has the significant advantages of simple operation and low cost, and has better overall benefits than the traditional seedling raising method.

[0004] Furthermore, there are currently no reports on container-based cuttings for Castanopsis truncatum seedlings, with only a few patents covering traditional cuttings and propagation. This present invention offers significant advantages in both innovation and practicality. Compared to traditional Castanopsis truncatum cutting techniques, this invention pioneers the concept of winter cuttings for Castanopsis truncatum seedlings, breaking through traditional seasonal limitations, broadening the cutting timeframe, simplifying the process, and significantly reducing technical costs. Furthermore, this invention optimizes the cutting medium, environmental regulation, and management practices, significantly improving overall efficiency. Summary of the Invention

[0005] The present invention aims to provide a method for raising seedlings of Castanopsis truncatum by container cuttings, aiming to solve the technical problems existing in the prior art regarding raising seedlings of Castanopsis truncatum. The present invention systematically studies conditions such as different cutting periods, cutting diameters, and cutting types, and optimizes a technical combination most suitable for raising seedlings of Castanopsis truncatum by container cuttings. This method eliminates the need for any shading, disinfection, or growth-promoting measures, thereby establishing a highly efficient and low-cost asexual propagation method for Castanopsis truncatum, making it highly suitable for factory-scale seedling cultivation.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A container cutting seedling raising method for Castanopsis truncatula comprises the following steps:

[0008] S1. Determine the time of cutting: the time of cutting is early January;

[0009] S2, preparation of seedling medium;

[0010] S3. Cutting selection: Choose strong, semi-lignified branches of the current year, with no disease and full buds;

[0011] S4. Cutting processing: Cut the cuttings into small uniform segments, leaving no leaves in each segment, and make the cuttings smooth;

[0012] S5. Propagation: insert the cuttings into the seedling medium. After the cuttings are completed, water until they are completely penetrated.

[0013] S6. Container placement: Place the container after cutting outdoors;

[0014] S7. Management after planting: weeding and watering regularly.

[0015] Furthermore,

[0016] Cutting location: Southern China, further, Changsha City, Hunan Province.

[0017] Furthermore,

[0018] The matrix in step S2 includes: a mixture of nutrient soil, loess, perlite, and vermiculite in a volume ratio of 2:2:1:1.

[0019] Furthermore,

[0020] The container in step S2 has a size of 22 cm × 18 cm × 18 cm.

[0021] Furthermore,

[0022] The cuttings described in step S4 have a thickness of 0.5 to 1.6 cm, preferably 0.8 to 1.6 cm.

[0023] The length of the cuttings is 10 to 15 cm.

[0024] Furthermore,

[0025] In step S4, the upper incision of the cutting is a flat incision, the lower incision is a 45° oblique incision, and the incision is smooth.

[0026] Furthermore,

[0027] The cutting depth in step S5 is 2 / 3 of the cutting.

[0028] Furthermore,

[0029] The cutting angle in step S5 is vertical insertion.

[0030] Furthermore,

[0031] In step S5, the number of cuttings in each container is 4 to 5, and the cutting spacing is 5 to 8 cm.

[0032] In summary, the present invention has the following beneficial effects:

[0033] (1) The present invention breaks the seasonal limitation of conventional cutting seedling cultivation of Castanopsis chinensis and discovers for the first time that early January is the best cutting time. The cutting survival rate and seedling growth indicators are significantly better than those at other cutting times.

[0034] (2) The present invention is the first to carry out the cultivation of Castanopsis truncatula seedlings through cuttings under purely natural climatic conditions in Changsha, Hunan Province, southern China, without any other auxiliary seedling cultivation measures, such as sunshade or greenhouse insulation;

[0035] Significantly reduce seedling cultivation costs.

[0036] (3) The cuttings of the present invention are simple to process and do not require disinfection or treatment with growth-promoting agents. Compared with the cutting treatment method in the prior art, the cost of seedling cultivation is greatly reduced.

[0037] (4) The present invention is the first to use a container with a specification of 22cm×18cm×18cm to carry out cutting seedling cultivation of Castanopsis chinensis; the number of cuttings in each container is 4 to 5, and the cutting spacing is 5 to 8 cm; this will greatly benefit the cutting survival rate and seedling growth.

[0038] (5) The present invention found that cuttings with a thickness of 0.8-1.6 cm, a length of 10-15 cm, and a terminal bud are most suitable for cuttings, and their cutting survival rate and seedling growth indicators are the best.

[0039] In summary, this study systematically studied different cutting periods and cutting handling methods to optimize the most suitable technical combination for container cutting seedling cultivation of Castanopsis truncatum, establishing a set of efficient asexual propagation methods for Castanopsis truncatum. This method not only provides a practical and feasible industrial seedling cultivation technology for asexual propagation of Castanopsis truncatum, but also has important practical significance for the promotion of improved Castanopsis truncatum varieties and improving the quality and efficiency of the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a photograph of callus tissue formed at the cut end of the Tung oil tree cuttings in Example 1 of the present invention;

[0041] Figure 1 A and Figure 1 B is a photo of the callus tissue of a single Castanopsis chinensis plant taken from different angles.

[0042] Figure 2 This is a photo of the rooting and germination of a single Castanopsis truncatula plant from March to July in Example 1 of the present invention;

[0043] Figure 2 A: Adventitious roots emerge in March; Figure 2 B: Adventitious roots elongate in May; Figure 2 C: July, root growth period; Figure 2 D: Cuttings germinate in March; Figure 2 E: In May, the axillary buds begin to grow; Figure 2 F: In July, the axillary buds grow into branches.

[0044] Figure 3 This is a photo of the growth of the Castanopsis truncatula container seedlings from March to July in Example 1 of the present invention;

[0045] Figure 3 A, 3D: March container seedlings; Figure 3 B, 3E: container seedlings in May; Figure 3 C, 3F: container seedlings in July.

[0046] Figure 4 These are photos of the rooting of Castanopsis truncatula container seedlings at different stages from March to July in Example 1 of the present invention;

[0047] Figure 4 A: Rooting picture of container seedlings in March; Figure 4 BC: Rooting diagram of container seedlings in May; Figure 4 DF: Rooting pictures of container seedlings in July.

[0048] Figure 5 This is a photo of the Tung oil tree softwood container cuttings seedlings transplanted in September in Example 1 of the present invention;

[0049] Figure 5 AB are photos of the transplanted single-plant container seedlings of Castanopsis chinensis. Figure 5 CD are photos of the overall growth of Castanopsis chinensis after transplanting. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below with reference to the examples, which do not limit the present invention.

[0051] Example 1

[0052] A container cutting seedling raising method for Castanopsis truncatula comprises the following steps:

[0053] Experiment on the effects of different cutting periods, cutting diameters and cutting types on the survival rate of Castanopsis chinensis container cutting seedlings.

[0054] The experimental site of this embodiment is located on the roof of a tree building in the Central South University of Forestry and Technology in Changsha, Hunan Province; the annual average temperature is around 19.0℃-19.5℃, the highest temperature is around 39℃-42℃, the lowest temperature is around -5℃-2℃, and the average annual precipitation is between 1250 and 1300mm. The experiment adopted a single-factor experimental design to study different cutting periods: early October 2023 (16.0℃-25.0℃), late October 2023 (15.0℃-23.0℃), early November 2023 (11.0℃-21.0℃), late November 2023 (8.0℃-20.0℃), December 2023 (3.0-14.0℃), early January 2024 (6.0℃-16 .0℃), early March 2024 (7.0℃-17.0℃), different cutting types (terminal buds, axillary buds), and different cutting thicknesses (thin plants 0.5-0.8cm, medium plants 0.8-1.2cm, thick plants 1.2-1.6cm) were used to investigate the effects of these three factors on the survival and growth of Castanopsis aviculare container cuttings seedlings. The most suitable cutting time and the optimal cutting combination for Castanopsis aviculare container cuttings seedlings were screened out; the cutting length was 10-15cm.

[0055] Experimental setup 1: Each period, the cuttings of Amur tung oil tree were divided into two groups: terminal buds and axillary buds, with 45 plants in each group. The terminal buds and axillary buds were also divided into three groups based on their diameter: fine, medium, and coarse (with even distribution of terminal and axillary buds), with 30 plants in each group. Experimental setup 2: Each period, 60 Amur tung oil tree cuttings (without distinction between cutting type and diameter) were set up specifically for the purpose of counting rooting results and leaf numbers, as shown in Table 1. The following operations were performed in sequence:

[0056] S1. Determination of cutting time: The cutting time is from October 2023 to March 2024;

[0057] S2. Preparation of seedling medium: The medium includes nutrient soil, loess, perlite, and vermiculite in a volume ratio of 2:2:1:1. Mix them evenly and then dispense them into containers with a size of 22 cm × 18 cm × 18 cm.

[0058] S3. Cutting selection: Choose strong, semi-lignified branches of the current year, with no disease and full buds;

[0059] S4. Cutting processing: Cut the cuttings into uniform small segments, without retaining leaves in each segment, and the cuttings are smooth; the cuttings are 0.5-1.6 cm thick and 10-15 cm long, respectively; the upper cutting of the cuttings is flat, and the lower cutting is oblique (45°), and the cutting is smooth;

[0060] S5. Propagation: Insert the cuttings into the seedling medium. After the cuttings are completed, water until they are completely penetrated. The cutting depth is 2 / 3 of the cuttings. The cutting angle is straight. The number of cuttings in each container is 4 to 5, and the cutting spacing is 5 to 8 cm.

[0061] S6. Container placement: Place the container after cutting outdoors;

[0062] S7. Post-planting management: regular weeding and watering;

[0063] The experiment started in early October 2023, and the statistical indicators in March 2024, May 2024 and July 2024 were: seedling height (cm), ground diameter (cm), average number of leaves (pieces); the statistical indicators in July 2024 were: total cutting survival rate (%), terminal bud cutting survival rate (%), axillary bud cutting survival rate (%), thin plant survival rate (%), medium plant survival rate (%), thick plant survival rate (%), rooting time (days), rooting rate (%), average number of roots (roots), average root length (cm), average number of leaves (pieces).

[0064] Table 1 Effects of different cutting periods on the survival rate and rooting rate of container-grown Castanopsis chinensis seedlings in July

[0065]

[0066]

[0067] Note: Thin, medium, and thick cuttings refer to cuttings with a diameter of [0.5-0.8] cm, (0.8-1.2) cm, and [1.2-1.6] cm, respectively. The average number of roots, root length, and leaf number are statistical results after five biological replicates.

[0068] As shown in Table 1, among the seven periods, the seedlings cut in early January 2024 had the highest overall survival rate (81.90%), terminal bud cutting survival rate (93.33%), axillary bud cutting survival rate (77.33%), thin plant survival rate (67.44%), medium plant survival rate (95.65%), thick plant survival rate (81.25%), rooting rate (93.33%), and average root length (17.33 cm). December 2023 was the next highest, with the highest overall cutting survival rate (80.24%), terminal bud cutting survival rate (87.46%), axillary bud cutting survival rate (76.95%), thin plant survival rate (63.33%), medium plant survival rate (89.82%), and thick plant survival rate (23.91%). Rooting time (97 days), rooting rate (83.81%), average number of roots (8.7), average root length (16.88 cm), and average number of leaves (12.0) were the highest. The lowest survival rate (10.99%) was recorded in early October 2023, with roots appearing after 38 days and continuing to grow in the second year.

[0069] Comparative analysis of seedlings taken in early January and early March revealed that: because the cuttings all started growing in March, the cuttings taken in early January were dormant in the early stage, and in March of the same year, they sprouted and grew shoots simultaneously with the cuttings taken in early March. However, the winter cuttings taken in early January reduced nutrient loss and retained nutrient base in the cutting medium, and the pruning wounds gradually healed to form callus tissue ( Figure 1 ), with a survival rate (81.90%) and rooting rate (93.33%) both higher than those of cuttings taken in early March (47.50% and 53.33%). Furthermore, early January is more suitable for cutting seedling cultivation, as it requires less manual care and has less competition for labor.

[0070] In summary, early January is the best time to grow Castanopsis aviculare seedlings through container cuttings. At this time, the survival rate of cuttings is high, the growth is vigorous, and the competition for labor is small. December is the second best time.

[0071] Table 2 Effects of different cutting periods and cutting types on the growth of container-grown cuttings of Castanopsis chinensis

[0072]

[0073] Note: Seedling height refers to the height of the above-ground part of the seedling.

[0074] The data in Table 2 show that the growth of various growth indicators of the container-grown Chinese tallow tree seedlings with different cutting periods and cutting types (thick, medium and thin cuttings were mixed and counted together) in March, May and July 2024. When observed in July 2024, the growth of various growth indicators of the Chinese tallow tree seedlings cut in early January 2024 was the largest, and the height of the terminal bud cuttings was 34.27%, 50.15%, 33.52% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024, respectively. The height of axillary bud cuttings seedlings were 27.35%, 40.59%, 24.99%, 20.14%, 37.77% and 36.91% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024 respectively. The ground diameter of the terminal bud cuttings in early January 2023 was 25.65%, 25.55%, 9.09%, 2.01%, 9.37% and 19.32% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024, respectively; the ground diameter of the axillary bud cuttings was 20.45%, 27.55%, 8.61%, 6.66%, 11.86% and 27.94% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024, respectively. The average number of leaves of the terminal bud cuttings in early January 2023 was 35.15%, 20.00%, -10.30%, -3.64%, 13.33% and 22.42% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024, respectively; the average number of leaves of the axillary bud cuttings was 43.52%, 35.75%, 7.25%, 3.63%, 12.44% and 26.42% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024, respectively.

[0075] In summary, early January is the best time to graft the top buds of cuttings, and the seedlings perform best in the late growth period (July), followed by December.

[0076] Table 3 Effects of different cutting periods and cutting diameters on the growth of container-rooted cuttings of Castanopsis chinensis

[0077]

[0078]

[0079] Note: Seedling height refers to the height of the above-ground part of the seedling.

[0080] Table 3 shows the growth rates of various growth indicators for container-derived Castanopsis truncatula seedlings with different cutting periods and cutting diameters (axillary and terminal bud cuttings are combined) in March, May, and July 2024. The growth rates of various growth indicators for Castanopsis truncatula seedlings that were cut in early January 2024 were the greatest. When observed in July 2024, the height of the cuttings with a diameter of 0.5-0.8 cm in early January 2024 was 22.09%, 20.96%, 37.44%, 41.38%, 38.89% and 18.68% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024, respectively; the height of the cuttings with a diameter of 0.8-1.2 cm in early January 2024 was 22.09%, 20.96%, 37.44%, 41.38%, 38.89% and 18.68% higher than that in early October 2023, late October 2023, early November 2023, December 2023 and early March 2024, respectively. The height of cuttings seedlings with a diameter of 1.2-1.6 cm in early January 2024 was 26.53%, 26.22%, 41.06%, 45.73%, 47.89% and 25.21% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024, respectively. The ground diameter of cuttings with a diameter of 0.5-0.8 cm in early January 2024 was 23.87%, 13.30%, 4.84%, 37.61%, 10.49% and 30.21% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024 respectively; the ground diameter of cuttings with a diameter of 0.8-1.2 cm in early January 2024 was 23.87%, 13.30%, 4.84%, 37.61%, 10.49% and 30.21% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024 respectively. The ground diameter of cuttings with a diameter of 1.2 to 1.6 cm in early January 2024 was 11.51%, 0.00%, 21.92%, 33.37%, 5.62% and 19.83% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024, respectively.The average number of leaves of cuttings with a diameter of 0.5-0.8 cm in early January 2024 was 72.86%, 52.86%, 34.29%, -7.14%, 5.71% and 27.14% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024 respectively; the average number of leaves of cuttings with a diameter of 0.8-1.2 cm in early January 2024 was 72.86%, 52.86%, 34.29%, -7.14%, 5.71% and 27.14% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023 and early March 2024 respectively. In late November 2023, December 2023, and early March 2024, the average number of leaves of cuttings with a diameter of 1.2 to 1.6 cm in early January 2024 was 74.68%, 46.84%, 43.04%, 2.53%, 8.86%, and 24.05% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023, and early March 2024, respectively. The average number of leaves of cuttings with a diameter of 1.2 to 1.6 cm in early January 2024 was 64.10%, 34.62%, 29.49%, 7.69%, 5.13%, and 25.64% higher than that in early October 2023, late October 2023, early November 2023, late November 2023, December 2023, and early March 2024, respectively.

[0081] Through comprehensive analysis of Tables 1 and 2, it can be seen that in early January 2024, the survival rate of medium-sized (0.8-1.2 cm) and thick-sized (1.2-1.6 cm) cuttings was significantly higher, and the seedlings grew well; the survival rate of cuttings and seedling growth in December were second best.

[0082] Table 4 Effects of different substrate ratios on the growth of container-grown cuttings of Castanopsis chinensis

[0083]

[0084] The data in Table 4 show that the most suitable substrate ratio for the growth of container-rooted Castanopsis chinensis seedlings is loess: organic nutrient soil: perlite: vermiculite = 2:2:1:1. Under this ratio, the overall growth performance is significantly better than other substrate combinations, with the highest survival rate and the best seedling growth condition.

[0085] The economic benefits of the container cutting seedling cultivation of Castanopsis tung oil tree in this application are as follows: compared with the traditional technical solution of cutting seedling cultivation which requires disinfection, hormone treatment and the construction of a shade net, with a plant spacing of 20 cm, about 20,000 cuttings per mu, and a cost of 0.8-1.5 yuan per plant, this technology does not require the above-mentioned treatment procedures, and the cost per plant is reduced to 0.15-0.6 yuan. By simplifying the operating steps and reducing material and labor costs, the seedling cultivation cost is reduced by 0.65-0.9 yuan compared with the traditional technology, significantly improving the economic benefits of large-scale cultivation, and having the technical advantages of simple procedures, low costs and strong adaptability to large-scale cultivation.

[0086] In summary, early January is the best time for container cutting seedling cultivation of Castanopsis chinensis. During this period, the survival rate of terminal buds and mid-stalk seedlings is the highest, the operation is simple, and the economic benefits are high; December is the second best time.

[0087] The technical solution of the present invention provides an exemplary description of the invention. Obviously, the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A method for raising seedlings of Castanopsis truncatula by cutting in a container, characterized in that: The following steps are involved: S1. Determine the cutting time: The cutting time is from December to early January; S2, preparation of seedling medium; S3. Cutting selection: Choose strong, semi-lignified branches of the current year, with no disease and full buds; S4. Cutting processing: Cut the cuttings into small uniform segments, leaving no leaves in each segment, and make the cuttings smooth; S5. Propagation: insert the cuttings into the seedling medium. After the cuttings are completed, water until they are completely penetrated. S6. Container placement: Place the container after cutting outdoors; S7. Management after planting: weeding and watering regularly.

2. The container cutting seedling raising method of Castanopsis aviculare according to claim 1, wherein: The time for cutting is early January.

3. The container cutting seedling raising method of Castanopsis aviculare according to claim 1, wherein: Cutting seedling raising location: Southern China, further: Changsha City, Hunan Province.

4. The container cutting seedling raising method of Castanopsis aviculare according to claim 1, characterized in that: The matrix in step S2 includes: a mixture of nutrient soil, loess, perlite, and vermiculite in a volume ratio of 2:2:1:

1.

5. The method for raising seedlings of Castanopsis aviculare by container cuttings according to claim 1, wherein: The container in step S2 has a size of 22 cm × 18 cm × 18 cm.

6. The container cutting seedling raising method of Castanopsis aviculare according to claim 1, characterized in that: The cuttings described in step S4 have a thickness of 0.5 to 1.6 cm, preferably 0.8 to 1.6 cm; further, the length of the cuttings is 10 to 15 cm.

7. The container cutting seedling raising method of Castanopsis aviculare according to claim 1, characterized in that: The upper incision of the cutting is a flat incision, the lower incision is a 45-degree oblique incision, and the incision is smooth.

8. The container cutting seedling raising method of Castanopsis aviculare according to claim 1, characterized in that: The cutting depth in step S5 is 2 / 3 of the cutting.

9. The container cutting seedling raising method of Castanopsis aviculare according to claim 1, characterized in that: The insertion angle in step S5 is straight insertion.

10. The container cutting seedling raising method of Castanopsis aviculare according to claim 1, characterized in that: In step S5, the number of cuttings in each container is 4 to 5, and the cutting spacing is 5 to 8 cm.

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