CN113812299A - Plant root-lifting cultivation method - Google Patents

Abstract

The application discloses a plant root-lifting cultivation method, which comprises the steps of firstly manufacturing a plurality of circular truncated cone-shaped moulds with upper and lower openings, placing a first layer of mould on the ground, adding nutrient soil to enable the middle of the soil surface to be high and the periphery to be low, laying a root control film on the soil surface, ensuring that a gap is reserved between the edge of the root control film and the inner wall of the mould, continuously adding the nutrient soil until the soil surface is flush with the upper opening of the mould, uniformly arranging a circle of cushion blocks on the soil surface at intervals, placing a second layer of mould on the cushion blocks and aligning with the first layer of mould, and repeating the process until all the moulds are sequentially placed from bottom to top; then uniformly sowing plant seeds at the opening of the top layer mould and the gap between the adjacent moulds, thinning out seedlings, supplementing seedlings and planting and managing; and finally, retaining branches and leaves of the plants of the top layer of the mould, only retaining roots and stems of the other plants, dismantling all the moulds, washing with water, and trimming to obtain the target root-lifting seedling. The method can produce the root-lifting seedlings with developed, strong and exposed root systems in batches in a short time.

Description

Plant root-lifting cultivation method

Technical Field

The invention relates to the technical field of plant artistic modeling, in particular to a plant root-extracting cultivation method.

Background

The common dew root plants are deeply loved by garden units and gardening enthusiasts all the time, the appearance is unique and has natural beauty, but the wild quantity of the common dew root plants is very small, the demand is continuously increased, and the market prospect of artificial cultivation is wide.

Common root extraction methods include a root-packing method, a packing method and the like. The root padding method comprises the following steps: pruning the root system of plant, getting rid of the downward growth root system, keeping the quadriversal growth root system, then stacking up hard things such as wood, stone in the plant bottom surface to fix remaining root system on hard things with palm fibre straw rope etc. and make the root system continue to grow all around, then the maintenance of normally planting of earthing. The packing method comprises the following steps: digging out the plant with roots, cleaning the roots, trimming the roots properly, coiling and weaving the roots according to a certain shape, and fixing the roots by palm fiber straw ropes.

However, the methods are only suitable for miniascape plants with small sizes, root systems of the miniascape plants can be conveniently trimmed and integrally moved in the growth process, and the methods are not operable for large garden plants such as lagerstroemia indica, red maple, acacia, michelia chapensis and the like which can grow to the height of several meters to ten meters. The common practice is: filling soil in a barrel with the height of 1-3 m, uniformly sowing on the surface of the soil, growing seeds into independent plants, enabling root systems of different plants to be connected in a staggered mode and finally to be combined into a whole along with the lapse of time, removing the barrel, and removing floating soil to enable thick parts on the upper portions of the root systems to be exposed outside.

However, this method also has the following problems:

1. the growth condition of root system can't control completely, and the seed of intermediate position takes root downwards and pricks into soil, and the root system quantity that outside is grown is rare, and the root system is concentrated inside soil, not only does not have any meaning as invisible part to carrying the root molding, can make the root molding size that finally obtains less moreover, and the root system that outside is visible is mostly the root that the seed of following the barrel periphery and broadcasting grows out, and the distribution is sparse, and the molding is not full.

2. Because only one layer of plants can be planted on the soil surface and the normal growth of the plants cannot be influenced, the initial number of root systems (namely, the root growing points) is limited, particularly for the variety with slow growth speed such as the podocarpus macrophyllus, the initial scale is small even if the root systems are connected together in a staggered way, and the whole root lifting modeling takes ten years or even longer.

3. Plant roots grows downwards along the barrel wall all the time, the width difference is not big about the whole root lifting molding, the risk of skewing or even toppling exists, and the distal end (the new position) of root system is comparatively slender, and the upper portion (the main root position) of root system is comparatively sturdy, demonstrates the visual effect of "head heavy and feet light", influences the root lifting aesthetic property, and follow-up a large amount of root repairing work that need carry out.

Therefore, there is a need in the art to develop a new plant root-extracting cultivation technique to solve the above problems.

Disclosure of Invention

The application aims to provide a plant root-lifting cultivation method, which can obtain plant root-lifting works with beautiful shapes and high peripheral root system density on the premise of low time cost. The technical scheme of the application is as follows:

a plant root-lifting cultivation method relates to the use of a special plant root-lifting cultivation device, the plant root-lifting cultivation device comprises a mold, a root-controlling film and a cushion block, the mold is of a pipeline-shaped structure with an upper opening and a lower opening, the area of the upper opening is smaller than or equal to the area of the lower opening, the number of the molds is at least two, and the area of the lower opening of the upper mold is smaller than the area of the upper opening of the lower mold;

the plant root extraction cultivation method comprises the following steps:

step 1) placing a first layer of mould on the ground and adding nutrient soil to ensure that the highest position of the nutrient soil surface is lower than the height of an upper opening of the mould;

step 2) laying a root control film on the soil surface of the nutrient soil, reserving a gap between the edge of the root control film and the inner wall of the mold, covering a layer of nutrient soil above the root control film, and uniformly surrounding a plurality of cushion blocks on the soil surface of the nutrient soil at intervals;

step 3) placing the second layer of moulds on the cushion block and aligning the second layer of moulds with the first layer of moulds, and repeating the process until all the moulds are assembled from bottom to top;

step 4) uniformly sowing plant seeds at the opening of the uppermost layer of the mould and at the gap between the adjacent moulds, and thinning and replanting the plant seedlings after the seeds germinate;

step 5), planting management;

and 6) cutting all branches and leaves of the plants in the other moulds except the uppermost mould, only keeping roots and roots, dismantling all moulds, washing soil on the surface with water, and carrying out secondary trimming to obtain the target root-extracting seedling.

It should be noted that, the term "the mold is placed on the ground" in step 1) of the present application means that the mold is located above the ground, and in this case, the mold may be in direct contact with the ground or in indirect contact with the ground through other structural members (such as a cushion block, etc.).

In some specific embodiments, each layer of die is a circular truncated cone structure with a small top and a big bottom.

In some specific embodiments, the shape of the nutrient soil surface in the mold is set to be higher in the middle and lower in the periphery before the root control film is not laid.

In some embodiments, the root control film is circular and a gap of 1-2 cm is left between the outer periphery and the inner wall of the mold.

In some specific embodiments, the root control film is a greenhouse film. Selecting high-quality brand-new clinker thick white film with the thickness of more than 0.8 mm.

In some specific embodiments, the pad is made of degradable material.

In some specific embodiments, the sidewall of the mold is provided with a plurality of seed supplementing positions.

In some specific embodiments, the planting management comprises watering, fertilizing, weeding, pruning, and pest control of the plant, depending on the stage of growth of the plant.

In some specific embodiments, the pruning comprises:

for the plants in the uppermost layer of the mould, when the plants grow to a preset height, bundling part of the plants at the central position together to serve as a main top, dividing the rest plants around into a plurality of parts to be bundled respectively to serve as lateral branches, inclining and shaping all the lateral branches outwards, and removing the bundling tool after the plants grow into a whole;

for plants in other moulds, the plants which grow vigorously are sharpened and part of branches and leaves are removed, so that all the plants can grow synchronously, and all the plants except the uppermost mould are trimmed to the same height before sprouting after the plants fall off, so that the plants can sprout and grow synchronously in spring in the next year.

In some specific embodiments, in said step 6), a wound healing agent is applied at the trimming location.

The technical scheme provided by the application has at least the following beneficial effects:

the method can rapidly cultivate target root-art seedlings in batches, has less planting labor and low time cost, paves a way for large-size rare tree species to the root-art market, ensures that all plant individuals are seeds for sprouting and growing but not for later transplanting, has strong stress resistance and high survival rate, and reduces loss in the cultivation process.

The plant root lifting cultivation device used in the method is specially made, the characteristics of small top and large bottom are presented no matter in the integral shape or in a single-layer mold, the cushion block is matched to be beneficial to maintaining stable gravity center and reducing the dumping risk in the cultivation process, the seeds are sowed in a layering mode from top to bottom by using the device, the problem that thick and strong main roots are concentrated on the upper layer of root roots is avoided, the root control film and the nutrient soil surface with the middle height and the periphery being low are utilized, the root systems of all plants are guaranteed to be forced to grow outwards after growing for a certain distance downwards, the root systems are enabled to be exposed as much as possible, and the artistic performance of the root roots of the plants is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that other drawings may be derived from those drawings without inventive effort for a person skilled in the art.

FIG. 1 is an axial cross-sectional view of a plant root-lifting growing device used in an embodiment of the present application;

in the figure: 1. the method comprises the following steps of A, a mold, 2, a root control film, 3, a cushion block, 4, nutrient soil, A and a seeding area.

Detailed Description

In order to facilitate understanding of the present application, the technical solutions in the present application will be described more fully and in detail with reference to the drawings and the preferred embodiments, but the scope of protection of the present application is not limited to the following specific embodiments, and all other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

It will be understood that when an element is referred to as being "coupled" or "connected" to another element, it can be directly coupled, connected or communicated with the other element or indirectly coupled, connected or communicated with the other element via other intervening elements.

Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present application.

Examples

In this embodiment, root extraction and cultivation are performed on lagerstroemia indica. The crape myrtle is a tree with high ornamental and special values, the height of the tree can reach 20 meters, the diameter at breast height can reach 100 centimeters, branches are flexible, the flowering period is 6-9 months, the branches are full of crowns when flowers bloom, the flower color is gorgeous, and the crape myrtle is a top-quality variety for manufacturing plant shapes. In addition, crape myrtle enjoys warm and humid climate, has strong negative resistance, cold resistance and strong adaptability to soil, can survive saline-alkali soil, has strong resistance to various pollution gases such as sulfur dioxide, hydrogen sulfide, nitrogen oxide and the like, and has strong disease and pest resistance, thereby being widely used for landscaping. With the attention and favor of the lagerstroemia indica, the sales volume of the lagerstroemia indica is increased year by year, and particularly, the lagerstroemia indica root art trees with special shapes are short in supply and short in demand due to the small quantity.

In the process of cultivating crape myrtle, a purpose-made plant root lifting cultivating device is designed and used, referring to fig. 1, the device comprises a mold 1, a root control membrane 2 and a cushion block 3, the mold 1 is of a pipeline-shaped structure with an upper opening and a lower opening, the upper opening area is smaller than or equal to the lower opening area, the number of the molds 1 is at least two, the lower opening area of the mold of the upper layer is smaller than that of the mold of the lower layer, and the mold 1 is filled with nutrient soil 4.

Each layer of the die has the same structure, the horizontal section of the die can be in a circular shape, an oval shape, a square shape or other shapes, the specific shape and the number of layers of the die are selected according to the actual cultivation requirement, and in the embodiment, the die 1 is in a circular truncated cone structure with a small upper part and a large lower part.

The material of the root control membrane 2 is standard that the root system can not penetrate in the plant growth process and has certain flexibility, in the embodiment, the root control membrane 2 is a high-quality brand-new clinker thick white membrane with the thickness of more than 0.8 mm. The root system of the plant grows to the position of the root control film downwards, then grows to the inner side wall of the mold at the position along the outer side of the root control film, continues to grow downwards from the gap of the root control film and the inner side wall of the mold at the position of the root control film, and is connected with the root system of the plant at the gap into a whole.

The cushion block 3 mainly plays a role in: 1. ensuring that the mold is placed on a plane; 2. the contact surface between the lower part of the mould and the soil is increased, and the pressure intensity is reduced to reduce the subsidence. The cushion block is made of degradable materials, namely materials which are easily decomposed by the action of microorganisms under natural environment conditions, such as wood, bamboo chips or other biodegradable plastics. In the embodiment, the cushion block is made of cheap and easily available bamboo chips.

The root extracting and cultivating process of the lagerstroemia indica is as follows;

firstly, designing and manufacturing a plant root lifting and cultivating device:

according to the specification of manufacturing large-scale root-art lagerstroemia indica nursery stocks, four layers of moulds are designed and manufactured, from bottom to top, the diameter of a lower opening of a first layer of mould is 100cm, the diameter of an upper opening of the first layer of mould is 95 cm, the diameter of a lower opening of a second layer of mould is 85 cm, the diameter of an upper opening of the second layer of mould is 80 cm, the diameter of a lower opening of a third layer of mould is 70 cm, the diameter of an upper opening of the third layer of mould is 65 cm, the diameter of a lower opening of a fourth layer of mould is 55 cm, the diameter of an upper opening of the fourth layer of mould is 50cm, and the height of each layer of mould is 50 cm.

Cutting the white film of the greenhouse with the new materials into circles with different sizes to be used as root control films, and preparing a plurality of bamboo chips with different lengths to be used as cushion blocks.

Secondly, preparing a seedling field

Planting points are arranged on the land planned to be planted according to the square distance of 6 m multiplied by 6 m, 2 kg of vegetable cake and 2 kg of calcium, magnesium and phosphorus are uniformly spread on each planting point within the range of 1.5 m in diameter, a soil plough is used for ploughing, the soil and fertilizer are uniformly mixed, the ploughed land is leveled, and a solid ground foundation is formed.

Third, assemble the plant and carry the root breeding device

A circle of bamboo chips with the length of 60 cm and the width of 3 cm is placed on a leveled land, the distance between every two adjacent bamboo chips is about 10 cm, and the first layer of mould is placed on the bamboo chips to ensure that the mould does not incline and deform. Adding prepared nutrient soil into a mold in advance and compacting, and piling the soil surface of the nutrient soil into a form with a high middle part and a low periphery, wherein the method specifically comprises the following steps: the vertical distance from the lowest position of the edge to the upper opening of the die is 8 cm, and the vertical distance from the highest position of the middle to the upper opening of the die is 4 cm.

And placing the root control membrane on the soil surface of the nutrient soil, leaving a gap of 1-2 cm between the edge of the placed root control membrane and the inner wall of the mold, and covering the root control membrane with the dry nutrient soil to enable the soil surface of the nutrient soil to be flush with the upper opening of the mold.

And placing a circle of bamboo chips with the length of 20cm and the width of 3 cm on the soil surface of the nutrient soil close to the edge of the mould again, wherein the distance between the adjacent bamboo chips is about 10 cm, and placing the second layer of mould on the bamboo chips and aligning the second layer of mould with the first layer of mould.

Adding nutrient soil into the second layer of mould and compacting, wherein the subsequent operation is the same as that of the first layer of mould: continuously piling up the soil surface with high middle part and low periphery, covering the root control film with nutrient soil with the height being flush with the upper opening of the mold, and placing a circle of bamboo chips on the soil surface of the nutrient soil close to the edge of the mold again. Repeating the operation, and finally completely assembling the four layers of the dies.

Thus, a crape myrtle root art cultivation model with the height of 200 cm and the bottom diameter of 100cm is manufactured. It is left for a period of time to achieve natural sedimentation.

Fourth, sowing crape myrtle seeds

The visible soil area in each layer of the mold was sprayed once with the herbicide before 20 days of spring.

After weeding for half a month, crape myrtle seeds with strong stress resistance, high growth speed and bright color are selected and sowed on the soil exposed out of each layer of the mold at intervals of 3-5 cm, and the sowing area A is shown in figure 1. The seeds are covered with dry silt or fire soil ash with the thickness of 2cm, the soil wet water for sowing the seeds is sprayed by a sprayer, the soil is sprayed with the bactericide once, and then the whole mould is tightly wrapped with the lagerstroemia indica seeds by a thin mulching film, so that the lagerstroemia indica seeds are promoted to germinate and grow, and the growth of the seeds damaged by birds, mice and the like is prevented.

And when the seeds germinate and grow to the height of 5-10 cm, removing the mulching film to allow the lagerstroemia indica seedlings to freely grow, and spraying the bactericide and the foliar fertilizer at the frequency of once every half month.

Thinning and replanting when the lagerstroemia indica bud grows to 10-20 cm. If the vacant and young seedling positions exist, the dense bud seedlings are transplanted to the vacant and young seedling positions for planting in cloudy days or in the evening of sunny days, root fixing water is well wetted, and the bud seedlings are carefully managed for one week to ensure survival. One seedling is reserved in each 10 cm of the sprouts in the first, second and third layers of moulds, too many seedlings need to be removed, one seedling is reserved in about 3-5 cm of the sprouts in the fourth layer of moulds, and the weeds are removed.

Fifth, planting management

Pruning: when the crape myrtle seedlings grow to be more than 50cm, lateral branches of the seedlings which grow vigorously are trimmed, leaves are removed, tip parts of the seedlings which grow vigorously are also trimmed, weak plants are not blocked by the plants which grow vigorously, the weak crape myrtle seedlings can grow rapidly, and the effect of synchronous growth with the original strong crape myrtle seedlings is achieved.

Before the lagerstroemia indica seedlings germinate after falling leaves, pruning all the lagerstroemia indica seedlings on the first layer mould, the second layer mould and the third layer mould to be 30 cm high so as to promote the lagerstroemia indica seedlings to germinate and synchronously grow in the spring of the next year.

Fertilizing: a small amount of fermented organic fertilizer water is applied once every 10 days; meanwhile, 0.2 percent of water-soluble compound fertilizer, leaf fertilizer and auxin can be sprayed on the leaf surface once a month, and the whole growth period is always run through.

Wetting: a spray nozzle for spray irrigation is arranged on the fourth layer of mould, so that each layer of seedlings can be sprayed with wet water. Especially in hot summer days, the water is basically kept wet every day.

And (3) pest control: in the growing season of the nursery stock, the plant diseases and insect pests need to be carefully checked, powdery mildew is mainly prevented and controlled in 5-6 months, and alternaria leaf spot is mainly prevented and controlled in 7 months later. The treatment method comprises the following steps: the spray was applied once a month with a banton fungicide. In the high aphid stage after 5 months, if a small amount of aphids are found, then the aphids are to be controlled in time, and the pests such as aphids, borers, gaeumannomyces, etc. are generally controlled by acetamiprid, Shisanlin, dichlorphos, Yiquqing, chlorpyrifos or Tianzu.

When the crape myrtle seedlings grow to be more than 120cm in height, branches and leaves below 100cm (the branches and leaves are still reserved above 100 cm) of the crape myrtle seedlings on the fourth layer of die are removed, about one fifth of the crape myrtle seedlings are bound together by a cloth elastic band at the center position, the crape myrtle seedlings are bound to the lower edge of the root as much as possible by taking the continuous seedlings as a standard, then the rest crape myrtle seedlings around are divided into four parts, each part is obliquely shaped towards the outside of the die at an angle of 80 degrees, and the parts 50cm away from the root are bound by an elastic band to form 4 side branches of a main top. The young leaves and buds of all seedlings should grow, but the seedlings are frequently pruned and threshed to ensure that the seedlings do not die of yin. One main top and four lateral branches are all healed into a whole in half a year under the action of binding growth, and the cloth elastic bands bound respectively are removed after the lagerstroemia indica seedlings fall off leaves in winter.

And in the next and third years, pest control is carried out according to the principle, the soil is kept moist, branches and leaves are trimmed, and fertilizers are reasonably applied according to the growth stage of the plants.

The diameter of the lagerstroemia indica seedlings is more than 3 cm at the moment, and due to seed sowing, the root system mainly grows downwards, and the main roots are about 1-2 cm thick and are distributed from top to bottom. Under the cooperation of each layer of the root control film, the roots of each layer of the lagerstroemia indica seedlings can only grow downwards along the edge of the mould, lateral roots can occur again, the roots are connected with one another and form a net-shaped body, the cross connection parts of the roots and the roots are combined together when the roots grow, the root systems of the lower parts are more, the roots can be combined into one piece as soon as possible, and powerful stability is formed to support the upper parts.

Sixth, demolish the mould

In the fourth year, the diameter of the main top of the crape myrtle tree is 10 cm thick, the diameter of the lateral branch is 6 cm thick, the whole crown is more than 6 m, and the mold can be disassembled. The method specifically comprises the following steps: before the lagerstroemia indica seedlings germinate after falling leaves, cutting off the lagerstroemia indica seedlings on the first layer mould, the second layer mould and the third layer mould, then removing the first layer mould, the second layer mould, the third layer mould and the fourth layer mould, washing soil on the surface with water, and interweaving the root systems of the lagerstroemia indica to form a whole in appearance, wherein the upper part and the lower part are uniform in thickness and are tightly arranged.

Then bundling the crape myrtle with root and root in the first, second and third layers, trimming the part which exceeds the root and root, and coating a wound healing agent on the trimmed part in time. A new, special, odd, ingenious, graceful and magnificent large-scale full-crown root-art lagerstroemia indica tree is perfectly presented.

By the method, the lagerstroemia indica can be cultivated into the large-scale root-art lagerstroemia indica tree by using seeds only for about four years, the root lifting height of the lagerstroemia indica tree is about 2 meters, the diameter of the lagerstroemia indica tree is about 100 centimeters, the lagerstroemia indica tree grows well, and the lagerstroemia indica tree can resist severe natural weather such as wind, rain, snow and the like. As a plurality of root systems are generated in the process of lifting the roots and are wrapped outside the soil balls for lifting the roots to form a layer of solid protective armor, and the effects of sunlight and temperature are added, the root systems of the seedlings exposed out of the ground can grow rapidly and are mutually staggered and connected into a whole, so that the survival rate of the transplanting is extremely high, the risk is low, and the market value is high.

Compared with the traditional bumping air transportation type seedling free growth or directly transplanting a plant growing in the field for years, the method has the advantages that the time cost is reduced, large-size and high-quality root-lifting seedlings can be obtained in batches, damage to wild population and ecology can not be caused, the transplanting survival rate is high (the transplanting survival rate of wild plants is always low, the growth potential is weak, the cost of produced artificial machinery is extremely high, in addition, due to super width in the transportation process, branches must be cut seriously, the natural attractiveness cannot be guaranteed, the ornamental effect is influenced), the naturalness of the whole canopy is maintained after transplanting, the economic value is high, and the method has a wide development prospect.

The above description is only a few examples of the present application and does not limit the scope of the claims of the present application, and it will be apparent to those skilled in the art that various modifications and variations can be made in the present application. Any improvement or equivalent replacement directly or indirectly applicable to other related technical fields within the spirit and principle of the present application by using the contents of the specification and the drawings of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A plant root lifting cultivation method is characterized in that a purpose-made plant root lifting cultivation device is used, the plant root lifting cultivation device comprises a mold, a root control film and a cushion block, the mold is of a pipeline-shaped structure with an upper opening and a lower opening, the area of the upper opening is smaller than or equal to the area of the lower opening, the number of the molds is at least two, and the area of the lower opening of the upper mold is smaller than the area of the upper opening of the lower mold;

the plant root extraction cultivation method comprises the following steps:

step 1) placing a first layer of mould on the ground and adding nutrient soil to ensure that the highest position of the nutrient soil surface is lower than the height of an upper opening of the mould;

step 2) laying a root control film on the soil surface of the nutrient soil, reserving a gap between the edge of the root control film and the inner wall of the mold, covering a layer of nutrient soil above the root control film, and uniformly surrounding a plurality of cushion blocks on the soil surface of the nutrient soil at intervals;

step 3) placing the second layer of moulds on the cushion block and aligning the second layer of moulds with the first layer of moulds, and repeating the process until all the moulds are assembled from bottom to top;

step 4) uniformly sowing plant seeds at the opening of the uppermost layer of the mould and at the gap between the adjacent moulds, and thinning and replanting the plant seedlings after the seeds germinate;

step 5), planting management;

and 6) cutting all branches and leaves of the plants in the other moulds except the uppermost mould, only keeping roots and roots, dismantling all moulds, washing soil on the surface with water, and carrying out secondary trimming to obtain the target root-extracting seedling.

2. The plant root-lifting cultivation method according to claim 1, wherein each layer of the molds is a round table structure with a small top and a big bottom.

3. The method of claim 2, wherein the shape of the soil surface of the nutrient soil in the mold is set to be higher in the middle and lower in the periphery before the root control film is not laid.

4. The plant root-lifting cultivation method according to claim 3, wherein the root-controlling membrane is circular and a gap of 1-2 cm is left between the outer periphery and the inner wall of the mold.

5. The plant root-lifting cultivation method according to claim 3, wherein the root-controlling film is a greenhouse film.

6. The method as claimed in claim 3, wherein the spacer block is made of degradable material.

7. The method as claimed in claim 3, wherein the side wall of the mold is provided with a plurality of seed supplementing positions.

8. A plant root extraction cultivation method according to any one of claims 1 to 7, wherein the planting management comprises watering, fertilizing, weeding, pruning and pest control of the plant according to the growth stage of the plant.

9. The plant root-lifting cultivation method according to claim 8, wherein the pruning comprises:

for the plants in the uppermost layer of the mould, when the plants grow to a preset height, bundling part of the plants at the central position together to serve as a main top, dividing the rest plants around into a plurality of parts to be bundled respectively to serve as lateral branches, inclining and shaping all the lateral branches outwards, and removing the bundling tool after the plants grow into a whole;

for plants in other moulds, the plants which grow vigorously are sharpened and part of branches and leaves are removed, so that all the plants can grow synchronously, and all the plants except the uppermost mould are trimmed to the same height before sprouting after the plants fall off, so that the plants can sprout and grow synchronously in spring in the next year.

10. The plant rooting method according to claim 9, wherein in the step 6), a wound healing agent is applied at the pruning site.

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