A rooting culture method of gold maple

Abstract

The application relates to a root lifting cultivation method of gold-leaved Ilex asprella, and the specific steps comprise the following steps: step one, shading treatment: the gold-leaved Ilex asprella plants are subjected to shading treatment for at least one month, so that the leaves of the gold-leaved Ilex asprella plants gradually change from yellow to green; step two, root promoting and strengthening cultivation treatment: the gold-leaved Ilex asprella plants with green leaves after the shading treatment in step one are subjected to adventitious root induction treatment and strong root cultivation treatment, so that the root system of the gold-leaved Ilex asprella plants is developed and strong. The application makes the leaves of the gold-leaved Ilex asprella plants change from yellow to green through the shading treatment on the gold-leaved Ilex asprella plants, so that the chlorophyll content accumulated in the leaves is sufficient to supply photosynthetic consumption, so as to reduce the root rot rate and mortality of the gold-leaved Ilex asprella plants in subsequent root lifting cultivation, and batch root lifting cultivation of the gold-leaved Ilex asprella plants is realized.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of root extraction cultivation of chlorotic leaf plants, and particularly relates to a root extraction cultivation method for gold-leafed Japanese holly. BACKGROUND

[0002] Gold-leafed Japanese holly (gold-leafed Japanese holly, numbered as Su S-SV-IH-004-2023) is a bud mutation variety of Nelly Stevens holly, with new leaves being golden yellow all year round, strong adaptability and tolerance to pruning; the fruits are red, and the plant can be used for potted plants, cut branches and landscaping, and is a special chlorophyll-leafed ornamental plant. At present, the market of modeling potted plants is booming, and "nursing piles" are favored by consumers. Gold-leafed Japanese holly has strong ornamental properties, but the number of modeling potted plants produced is small, and there are few systematic, feasible and easy-to-implement root extraction cultivation methods for gold-leafed Japanese holly.

[0003] Compared with conventional tree species, the root extraction process of gold-leafed Japanese holly is more complicated, which can easily cause poor root growth, rotten roots or whole plant death. The reason is that the chlorophyll content in the leaves is too low to synthesize enough nutrients for its own growth. Therefore, the first problem to be solved in the root extraction cultivation of chlorophyll-leafed plants such as gold-leafed Japanese holly is to increase the chlorophyll content in the leaves.

[0004] In addition, in the process of root extraction cultivation of gold-leafed Japanese holly plants, the root system of gold-leafed Japanese holly plants is short and weak, and in the process of root cultivation, artificial cleaning and layering of the culture medium are required to expose the rhizome of gold-leafed Japanese holly plants. Especially in the process of batch root extraction cultivation, the artificial workload will be large. SUMMARY

[0005] The purpose of the present application is to provide a root extraction cultivation method for gold-leafed Japanese holly to solve the above problems.

[0006] The present application achieves the above-mentioned purpose by the following technical solutions:

[0007] A root extraction cultivation method for gold-leafed Japanese holly, comprising the following specific steps:

[0008] Step 1: shading treatment: the gold-leafed Japanese holly plants are subjected to shading treatment for at least 1 month, so that the leaves of the gold-leafed Japanese holly plants gradually change from yellow to green;

[0009] Step 2: root-promoting and root-strengthening cultivation treatment: the gold-leafed Japanese holly plants with green leaves after the shading treatment in step 1 are subjected to adventitious root induction treatment and root-strengthening cultivation treatment to promote the development and robustness of the root system of the gold-leafed Japanese holly plants;

[0010] Step 3: layering cultivation: the gold-leafed Japanese holly plants after the root-promoting and root-strengthening cultivation treatment in step 2 are planted in the layering culture medium in the cultivation container;

[0011] Step four, root lifting cultivation management: thin and frequent application of fertilizer, sterilization, full light conservation, during the conservation process, the layered culture medium is cleaned from top to bottom along the cultivation container to make the golden shield fern plants gradually expose the root part, and the root part is shaped by using a shaping tool, so as to realize the root lifting cultivation of the golden shield fern plants.

[0012] As a further optimization scheme of the present application, in step one, the light shielding treatment makes the leaves of the golden shield fern change from yellow to green, so as to accumulate enough chlorophyll content in the leaves to supply photosynthetic consumption;

[0013] The light shielding treatment selects a light shielding film with a light shielding rate of 68%-80%.

[0014] As a further optimization scheme of the present application, in step two, the golden shield fern plants are subjected to adventitious root induction treatment and strong root cultivation treatment by using soaking rooting agents and rooting powders;

[0015] The soaking rooting agent is any one or more of naphthalene acetic acid and indole butyric acid;

[0016] The rooting powder is any one or more of ABT1 and ABT2.

[0017] As a further optimization scheme of the present application, in step three, the layered culture medium is sand / ceramsite, pine needle soil, peat soil, and perlite from top to bottom along the cultivation container, wherein the pine needle soil, peat soil, and perlite are uniformly mixed with organic compound fertilizer.

[0018] As a further optimization scheme of the present application, in step four, the cultivation container comprises an outer pot, an inner pot arranged inside the outer pot, and a plurality of groups of detachable heightening guards arranged above the inner pot from bottom to top;

[0019] The layered culture medium is filled in the inner pot and the detachable heightening guards;

[0020] The detachable heightening guard comprises two guard plates that are mutually clamped, a plurality of layers of cleaning brushes are arranged on the opposite side of the two guard plates, and each layer of cleaning brushes on the two guard plates is arranged by being interpenetrated;

[0021] The cultivation container further comprises a dismounting and cleaning assembly arranged inside the outer pot and used for dismounting each group of detachable heightening guards and cleaning the layered culture medium in the protection range of the guard plate.

[0022] As a further optimization scheme of the present application, the dismounting and cleaning assembly comprises two connection plates symmetrically arranged and respectively in sliding connection with the outer basin, a fixing plate arranged at the bottom of the two connection plates and in sliding connection with the outer basin, two connection seats symmetrically arranged on the guard plate and respectively in rotary connection with the two connection plates, an electric telescopic member arranged between the fixing plate and the guard plate and used for driving the guard plate to swing up and down, and a power assembly used for driving the connection plates, the connection seats, the guard plate, the fixing plate and the electric telescopic member to move along the horizontal direction of the outer basin.

[0023] As a further optimization scheme of the present application, the outer basin is internally provided with a support plate, the power assembly comprises two lead screws symmetrically arranged and respectively in rotary connection with the outer basin and the support plate, a nut seat connected with the lead screws through a ball nut pair, a driving motor connected with one of the lead screws, and a synchronizing member used for driving the two lead screws to synchronously rotate, and the two connection plates are respectively fixedly connected with the two nut seats.

[0024] The present application has the following beneficial effects:

[0025] 1) The present application makes the leaves of gold-leafed Japanese quince change from yellow to green through light shielding treatment, so that the leaves accumulate sufficient chlorophyll content to supply photosynthetic consumption, so as to reduce the root rot rate and mortality of the gold-leafed Japanese quince plants in subsequent root lifting cultivation, and realize batch root lifting cultivation of the gold-leafed Japanese quince plants;

[0026] 2) The present application significantly improves the growth rate and thickening rate of the main root stems of the gold-leafed Japanese quince plants through the combined use of indole-3-butyric acid and rooting powders ABT1 and ABT2, so that the root lifting cultivation of the gold-leafed Japanese quince plants with long and thick root stems is obtained;

[0027] 3) The present application provides a cultivation container for root lifting cultivation of gold-leafed Japanese quince plants, which can automatically dismount the guard plates of each detachable heightening guard and clean the layered culture medium in the protection range of the guard plates, thereby reducing the workload of manually cleaning the layered culture medium to expose the root stems of the gold-leafed Japanese quince plants, realizing automatic and batch root lifting cultivation of the gold-leafed Japanese quince plants, and having simple structure and convenient use;

[0028] 4) The present application is provided with a plurality of layers of cleaning brushes on the opposite sides of the two guard plates, so that when the guard plates and the cleaning brushes connected therewith are swung up and down by the electric telescopic member, the layered culture medium in the protection range of the guard plates can be swept away; each layer of cleaning brushes on the two guard plates is arranged in interpenetration, so that the air permeability of the layered culture medium filled in each detachable heightening guard is increased, thereby reducing the root rot of the gold-leafed Japanese quince plants and the mortality. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the present application.

[0030] Figure 2 is a sectional view of a part of the structure of the present application.

[0031] In the figure: 1, outer basin; 2, inner basin; 3, detachable height increasing protection piece; 4, cleaning brush; 5, connecting seat; 6, support plate; 7, screw rod; 8, nut seat; 9, connecting plate; 10, driving motor; 11, synchronous piece; 12, fixed plate; 13, electric telescopic piece. DETAILED DESCRIPTION

[0032] The present application will be further described in detail below with reference to the accompanying drawings. It is necessary to point out here that the following detailed description is only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0033] I. Materials

[0034] The methods used in this embodiment are conventional methods known to those skilled in the art, and the reagents and other materials used are commercially available products, unless otherwise specified.

[0035] II. Methods

[0036] In order to verify the effect of shading films with different shading rates (68%-80%) on the root rot and death of Rhaphidophyllum decursivum root lifting cultivation, the following Examples 1-3 and Blank Group 1 were set up, wherein Blank Group 1 is Rhaphidophyllum decursivum plants without step one, shading treatment, as follows:

[0037] Example 1

[0038] A Rhaphidophyllum decursivum root lifting cultivation method, the specific steps comprising:

[0039] Step one, shading treatment: the Rhaphidophyllum decursivum plants are subjected to shading treatment for one month, so that the leaves of the Rhaphidophyllum decursivum gradually change from yellow to green;

[0040] Step two, root promoting and strengthening cultivation treatment: the Rhaphidophyllum decursivum plants with green leaves after step one shading treatment are subjected to adventitious root induction treatment and strong root cultivation treatment, so as to promote the development and strength of the root system of the Rhaphidophyllum decursivum plants;

[0041] Step three, stratification cultivation: the Rhaphidophyllum decursivum plants after the root promoting and strengthening cultivation treatment of step two are planted into the stratified culture medium in the cultivation container;

[0042] Step 4: Root Raising and Cultivation Management: Apply light fertilizer frequently, sterilize, and maintain full sunlight. During the cultivation process, clean the layered culture medium from top to bottom along the cultivation container to gradually expose the roots of the Golden Armor Holly plant. Use shaping tools to shape the roots, thereby achieving root raising cultivation of the Golden Armor Holly plant.

[0043] Preferably, in step one, the shading treatment causes the leaves of the golden holly to change from yellow to green, so that the leaves accumulate enough chlorophyll to supply their own photosynthetic consumption.

[0044] The shading treatment uses a shading film with a shading rate of 80%.

[0045] Preferably, in step two, the Golden Armor Holly plants are treated with adventitious root induction and root-strengthening treatment by soaking in rooting agent and rooting powder;

[0046] The rooting agent used for soaking is naphthaleneacetic acid; the rooting powder is ABT1.

[0047] The rooting agent was mixed with deionized water to obtain a rooting agent solution. The roots of the Golden Armor Holly plant were soaked in the rooting agent solution for 5 hours at room temperature (20℃±5℃).

[0048] The rooting powder was mixed with deionized water to obtain a rooting powder solution, and the roots of the Golden Armor Holly plant were soaked in the rooting powder solution for 3 hours at room temperature (23℃±5℃).

[0049] The rooting agent concentration in the soaking rooting agent solution was 2.6 g / L, and the rooting powder concentration in the rooting powder solution was 225 mg / L.

[0050] Preferably, in step three, the layered culture medium consists of sand / ceramsite, pine needle soil, peat moss, and perlite from top to bottom along the cultivation container, wherein organic compound fertilizer is uniformly mixed in the pine needle soil, peat moss, and perlite.

[0051] Preferred, such as Figures 1-2 As shown, in step four, the cultivation container includes an outer pot 1, an inner pot 2 located inside the outer pot 1, and several sets of detachable heightening protective parts 3 arranged sequentially from bottom to top above the inner pot 2.

[0052] The layered culture medium is filled inside the inner basin 2 and the removable heightened protective piece 3;

[0053] The detachable heightening guard 3 includes two interlocking guard plates. Several layers of cleaning brushes 4 are provided on the opposite side of the two guard plates. Each layer of cleaning brushes 4 on the two guard plates is interlocked with each other.

[0054] The cultivation container further comprises a dismounting and cleaning assembly arranged inside the outer pot 1 and used for dismounting each set of the detachable heightening guard 3 and cleaning the layered culture medium within the protection range of the guard.

[0055] It should be noted that each layer of the cleaning brush 4 on the two guards is arranged in interpenetration, which has the advantage of increasing the air permeability of the layered culture medium filled inside each detachable heightening guard 3, thereby reducing the occurrence of root rot of the gold maple plant.

[0056] It should be noted that in the embodiment, the total depth of the inner pot 2 and all the detachable heightening guards 3 is greater than or equal to 50 cm, and the depth of the inner pot 2 is greater than or equal to 15 cm.

[0057] Preferably, the dismounting and cleaning assembly comprises two connection plates 9 symmetrically arranged and respectively in sliding connection with the outer pot 1, a fixed plate 12 arranged at the bottom of the two connection plates 9 and in sliding connection with the outer pot 1, two connection seats 5 symmetrically arranged on the guard and respectively in rotary connection with the two connection plates 9, an electric telescopic piece 13 arranged between the fixed plate 12 and the guard and used for driving the guard to swing up and down, and a power assembly driving the connection plates 9, the connection seats 5, the guard, the fixed plate 12 and the electric telescopic piece 13 to move along the horizontal direction of the outer pot 1.

[0058] Preferably, a support plate 6 is arranged inside the outer pot 1, and the power assembly comprises two lead screws 7 symmetrically arranged and respectively in rotary connection with the outer pot 1 and the support plate 6, a nut seat 8 connected with the lead screw 7 through a ball nut pair, a driving motor 10 connected with one of the lead screws 7, and a synchronization piece 11 used for driving the two lead screws 7 to synchronously rotate, and the two connection plates 9 are respectively fixedly connected with the two nut seats 8.

[0059] It should be noted that in the embodiment, the synchronization piece 11 is two synchronization wheels respectively sleeved on the two lead screws 7 and a synchronization belt arranged between the two synchronization wheels.

[0060] When it is necessary to dismount the guard of the detachable heightening guard 3 and clean the layered culture medium within the protection range of the guard, the driving motor 10 is first started, and the driving motor 10 works to drive the two lead screws 7 to rotate through the synchronization piece 11, so that the nut seat 8, the connection plate 9, the connection seat 5, the guard connected with the connection seat 5, the fixed plate 12 and the electric telescopic piece 13 move together along the lead screw 7 away from the other guard of the detachable heightening guard 3, so as to separate the two guards, and when the guard and the cleaning brush 4 connected with the guard are pulled to move, the layered culture medium within the protection range of the guard is loosened and collapses and falls off, and is moved to the position shown in FIG. 6. Figures 1-2When the mobile shield is in the state shown, the mobile shield is located at the periphery of the layered culture medium, facilitating subsequent up-and-down tilting of the mobile shield. The driving motor 10 is turned off, and the electric telescopic member 13 is started again. The electric telescopic member 13 works to drive the mobile shield and the cleaning brush 4 connected to the mobile shield to tilt up and down, so that the layered culture medium in the protection range of the mobile shield is loosened further, and the layered culture medium in the protection range of the mobile shield is cleaned away by the cleaning action of the cleaning brush 4, so that the root system of the gold-leafed wintergreen is gradually exposed, thereby achieving the functions of automatically disassembling the mobile shield of each group of detachable heightening shields 3 and cleaning the layered culture medium in the protection range of the mobile shield. It should be noted that, according to the cultivation needs, only one mobile shield constituting the detachable heightening shield 3 can be disassembled at a time.

[0061] Example 2

[0062] A gold-leafed wintergreen root lifting cultivation method, which is different from example 1 in that, in the present example, the light shielding treatment selects a light shielding film with a light shielding rate of 75%;

[0063] The rest is the same as example 1.

[0064] Example 3

[0065] A gold-leafed wintergreen root lifting cultivation method, which is different from example 1 in that, in the present example, the light shielding treatment selects a light shielding film with a light shielding rate of 68%;

[0066] The rest is the same as example 1.

[0067] The gold-leafed wintergreen plants used in examples 1-3 and blank group 1 are 60 plants, and the other root lifting cultivation conditions of examples 1-3 and blank group 1 are kept consistent. The rotten root rate and mortality of the gold-leafed wintergreen plants after step four, root lifting cultivation and management (time is 2 years) are counted, wherein,

[0068] The rotten root rate is: (the number of rotten root gold-leafed wintergreen plants / 60 plants) x 100%;

[0069] Among them, the rotten root gold-leafed wintergreen plant is that the rotten root area (or volume) of the gold-leafed wintergreen plant accounts for more than 15% of the total root area (or volume);

[0070] The mortality is: (the number of dead gold-leafed wintergreen plants / 60 plants) x 100%.

[0071] Table 1: Rotten root rate and mortality statistics table of gold-leafed wintergreen root lifting cultivation of examples 1-3 and blank group 1

[0072]

[0073]

[0074] Experimental conclusion: According to the data in Table 1, it can be known that the light shielding film with a light shielding rate of 75% has the best use effect, therefore, in Examples 1-3, Example 3 is the optimal scheme.

[0075] In order to verify the effects of different combinations of soaking rooting agents and rooting powders on the growth and thickening of the root system of the golden shield fern (the mass concentration of the soaking rooting agent solution is 2.6 g / L, and the mass concentration of the rooting powder solution is 225 mg / L), the following Examples 4-11 and Comparative Examples 1-4 and a blank group 2 were set up, wherein the blank group 2 is the golden shield fern plants without the step two, root promoting and strengthening cultivation treatment, and the solution ratio of the root promoting and strengthening cultivation treatment of Examples 3-6 and Comparative Examples 1-2 is shown in Table 2 as follows:

[0076] Table 2 Solution ratio table of the root promoting and strengthening cultivation treatment of Examples 3-6 and Comparative Examples 1-2

[0077]

[0078]

[0079] Note: When the soaking rooting agent is naphthalene acetic acid and indole butyric acid, the mass ratio is 1:1; when the rooting powder is ABT No. 1 and ABT No. 2, the mass ratio is 1:1.

[0080] The golden shield fern plants used in Examples 3-11, Comparative Examples 1-4 and the blank group 2 are all 60, and the other root lifting cultivation conditions of Examples 3-11, Comparative Examples 1-4 and the blank group 2 are kept consistent. The main root stem growth rate and the main root stem thickening rate of the golden shield fern plants after the step four, root lifting cultivation management (for 2 years) are counted, wherein the calculation methods of the main root stem growth rate and the main root stem thickening rate are as follows:

[0081] The average main root length of the selected golden shield fern plants at the beginning of the experiment is H1 (the height of the selected golden shield fern plants is in the range of 30 cm±5 cm, the average height of the 60 golden shield fern plants is 32.7 cm, and the main root length of the selected golden shield fern plants is in the range of 18 cm±2 cm, and the average main root length of the 60 golden shield fern plants is 19.2 cm), and the average main root length of the surviving golden shield fern plants after the step four, root lifting cultivation management (for 2 years) is H2, the average growth amount of the main root stem is △H (cm), and △H is H2-H1.

[0082] The main root stem growth rate is: (△H / H1)×100%;

[0083] The average diameter of the selected golden maple wintergreen plant main root at the thickest position was D1 (the diameter of the selected golden maple wintergreen plant main root at the thickest position was in the range of 3.2 cm±0.5 cm, and the average diameter of the main root of 60 golden maple wintergreen plants at the thickest position was 3.5 cm), and the average diameter of the thickest position of the main root of the survived golden maple wintergreen plant after the root lifting cultivation management of step four (for 2 years) was D2, the average diameter of the thickest position of the main root stem was thickened by △D (cm), and △D was △2-△1.

[0084] The main root stem thickening rate was (△D / D1)×100%.

[0085] Table 3 experimental data statistics table of examples 3-11, comparative examples 1-4 and blank group 2

[0086] Main root stem growth rate Main root stem thickening rate Example 3 81.9％ 67.9％ Example 4 80.5％ 68.5％ Example 5 81.2％ 68.2％ Example 6 80.8％ 68.8％ Example 7 79.4％ 69.4％ Example 8 92.1％ 81.1％ Example 9 81.35％ 68.4％ Example 10 79.95％ 69.0％ Example 11 80.65％ 68.7％ Comparative Example 1 68.9％ 55.3％ Comparative Example 2 67.8％ 56.2％ Comparative Example 3 65.7％ 52.8％ Comparative Example 4 64.3％ 53.4％ Blank Group 2 52.7％ 40.2％

[0087] Note: the above data are verified by variance.

[0088] Experimental conclusion: from the data of examples 3-11 and blank group in table 3, it can be seen that the main root stem growth rate and thickening rate of the golden maple wintergreen plant obtained by the root lifting cultivation of example 3-11 are significantly higher than those of blank group 2, which shows that the soaking rooting agent and rooting powder used in the present application have a significant effect on the root stem growth and thickening of the golden maple wintergreen plant.

[0089] From the data of examples 3-11 and comparative examples 1-4 in table 3, it can be seen that the soaking rooting agent used is indole-3-butyric acid, and the rooting powder is ABT1 and ABT2 (the mass ratio of ABT1 and ABT2 is 1:1), and the main root stem growth rate and thickening rate of the golden maple wintergreen plant are 92.1% and 81.1% respectively, which are significantly better than those of examples 3-7, 9-11, therefore, in example 3-11, example 8 is the optimal example, and according to the data of the ratio in table 2, it can be seen that indole-3-butyric acid, ABT1 and ABT2 are used together, which has a certain synergistic effect, and can significantly improve the main root stem growth rate and thickening rate of the golden maple wintergreen plant, so as to obtain the root lifting cultivation golden maple wintergreen plant with long and thick root stems.

[0090] The above examples only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A method for root pruning of gold maple, characterized by: The specific steps include: Step one, shading treatment: the golden shield plant is subjected to shading treatment for at least one month, so that the leaves of the golden shield plant gradually change from yellow to green; Step two, root promoting and strengthening cultivation treatment: the golden shield plant with green leaves after the step one shading treatment is subjected to adventitious root induction treatment and strong root cultivation treatment, so as to promote the development and strength of the root system of the golden shield plant; Step three, stratified cultivation: the golden shield plant after the step two root promoting and strengthening cultivation treatment is planted into the stratified culture medium in the cultivation container; The stratified culture medium is sand / soil, pine needle soil, peat soil and perlite from top to bottom along the cultivation container, wherein the pine needle soil, peat soil and perlite are uniformly mixed with organic compound fertilizer; Step four, root lifting cultivation management: thin and frequent fertilization, sterilization, full light illumination and maintenance, during the maintenance process, part of the stratified culture medium along the cultivation container is cleaned from top to bottom, so that the root of the golden shield plant gradually emerges, and a shaping tool is used for root shaping treatment, so as to realize the root lifting cultivation of the golden shield plant; The cultivation container comprises an outer pot (1), an inner pot (2) arranged in the inner pot (1), and a plurality of groups of detachable height increasing guards (3) arranged above the inner pot (2) from bottom to top; The stratified culture medium is filled in the inner pot (2) and the detachable height increasing guard (3); The detachable height increasing guard (3) comprises two mutually clamped guard plates, a plurality of layers of cleaning brushes (4) are arranged on the opposite side of the two guard plates, and each layer of cleaning brushes (4) on the two guard plates are arranged in interpenetration; The cultivation container further comprises a disassembly and cleaning assembly arranged in the outer pot (1) and used for disassembling the guard plates of each group of detachable height increasing guards (3) and cleaning the stratified culture medium in the protection range of the guard plates.

2. The root pruning method of the gold maple ivy according to claim 1, characterized in that: In step one, the shading treatment selects a shading film with a shading rate of 68%-80%.

3. The root pruning method of the gold maple ivy according to claim 1, characterized in that: In step two, the adventitious root induction treatment and strong root cultivation treatment of the golden shield plant are carried out by soaking rooting agent and rooting powder; The rooting agent is any one or more of naphthalene acetic acid and indole butyric acid; The rooting powder is any one or more of ABT1 and ABT2.

4. The root pruning method of gold maple according to claim 1, characterized in that: The disassembly and cleaning assembly comprises two symmetrical connecting plates (9) which are slidably connected with the outer pot (1), a fixed plate (12) arranged at the bottom of the two connecting plates (9) and slidably connected with the outer pot (1), two connecting seats (5) which are symmetrically arranged on the guard plates and rotatably connected with the two connecting plates (9), an electric telescopic piece (13) arranged between the fixed plate (12) and the guard plate and used for driving the guard plate to swing up and down, and a power assembly which drives the connecting plates (9), the connecting seats (5), the guard plates, the fixed plate (12) and the electric telescopic piece (13) to move along the horizontal direction of the outer pot (1).

5. The root pruning method of claim 4, wherein: The outer basin (1) is internally provided with a support plate (6), the power assembly comprises two symmetrically arranged screw rods (7) respectively rotationally connected with the outer basin (1) and the support plate (6), a nut seat (8) connected with the screw rod (7) through a ball nut pair, a driving motor (10) connected with one of the screw rods (7), and a synchronizing part (11) for driving the two screw rods (7) to synchronously rotate.

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