Grafting healing device and grafting healing method for recycling waste plastic bottles

Abstract

The invention belongs to the technical field of grafting seedling basic devices, and discloses a grafting healing device and a grafting healing method for recycling waste plastic bottles. The waste plastic bottles are soaked in 5% sodium hypochlorite to be disinfected for 30 min or sprayed with 75% medical alcohol to be disinfected, and the waste plastic bottles are cleaned with tap water and dried in the air; the method comprises the following steps: cutting an air-dried plastic bottle body according to a ratio of 3: 7 or 4: 6, punching a bottle cap by using a sharp tool, penetrating a cotton sliver with a diameter approximate to that of a bottle cap hole through the bottle cap hole so as to facilitate water absorption of soil, and inversely buckling the upper half part of the bottle body on the lower half part of the upright bottle body; the upside-down upper half part of the bottle body is used for filling a culture medium, the lower half part of the bottle body is used as a water storage tank, and the water adding amount does not exceed the upside-down bottle cap or does not exceed 2 / 3 of the water adding amount of the upside-down bottle body. The grafting healing device is wide in application range and can be used for various plug seedling seeds, and the seedling cultivation effect is better than that of plug seedling.

Description

Technical Field

[0001] The invention belongs to the technical field of grafting seedling raising basic devices, and in particular relates to a grafting healing device and a grafting healing method for recycling discarded plastic bottles. Background Art

[0002] Since the 1950s, plastic production has grown faster than any other material, and the world has gradually shifted from producing durable plastics to producing disposable plastics. In recent years, watermelon and melon cultivation has gradually become more facility-based and production has moved towards scale, exacerbating the occurrence of continuous cropping problems in watermelons. The use of grafted seedlings has overcome the continuous cropping problem, but the management of grafted seedlings has also become a hotly debated issue.

[0003] At present, many institutions and seedling companies use plastic plug trays to cultivate grafted seedlings. In order to maintain the soil moisture of the seedlings, plug tray manufacturers have also produced plastic pallets and temperature-controlled boxes. Although plug trays are convenient for large-scale seedling cultivation, their poor quality and easy damage will undoubtedly cause plastic pollution. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a grafting healing device and a grafting healing method for recycling discarded plastic bottles.

[0005] The invention is implemented as follows: a grafting and healing device for recycling discarded plastic bottles comprises the following steps: the discarded plastic bottles are immersed and disinfected in 5% sodium hypochlorite for 30 minutes or sprayed with 75% medical alcohol for disinfection, and then washed and dried with tap water; the dried plastic bottle bodies are cut in a ratio of 3:7 or 4:6, the bottle caps are punched with a sharp tool, a cotton strip with a diameter close to that of the bottle cap hole is passed through the bottle cap hole to facilitate soil water absorption, and the upper part of the bottle body is inverted on the lower part of the upright bottle body.

[0006] Furthermore, the diameter of the discarded plastic bottles shall not be less than 5CM.

[0007] Further, the diameter of the hole is 4 mm-9 mm.

[0008] Furthermore, the inverted upper part of the bottle body is used to fill the cultivation medium, and the lower part of the bottle body is used as a water storage tank, and the amount of water added does not exceed the inverted bottle cap or does not exceed 2 / 3 of the upright bottle body.

[0009] Another object of the present invention is to provide a grafting healing method of a grafting healing device for recycling discarded plastic bottles, comprising the following steps:

[0010] (1) Raising scions and rootstocks in a grafting healing device;

[0011] (2) grafting of scion and stock in a graft healing device;

[0012] (3) Management of the graft healing period in the graft healing device.

[0013] Furthermore, in step (1), the scion and rootstock seeds are disinfected with 5% sodium hypochlorite for 10 minutes, washed with tap water, soaked in 55-60°C warm water until the seeds reach room temperature for 6-8 hours; germinated at a constant temperature of 30°C until the radicle is white, and then sown in a simple grafting healing device; and grafted when the first true leaf is flat.

[0014] Furthermore, in step (2), monocotyledon grafting is adopted, and the scion is beveled at an angle of 30° 1 cm below the base of the cotyledon, and the cut surface is smooth; the rootstock is beveled at an angle of 30° at the base of the cotyledon, and a piece of cotyledon and all growth points are removed, and the cut surface is smooth; the cut surfaces of the rootstock and the scion are tightly fitted and fixed with a grafting clamp.

[0015] Furthermore, the blades and grafting clips used need to be disinfected with 75% medical alcohol in advance and used after being dried naturally.

[0016] Furthermore, in step (3), the grafted seedlings are placed in an open space and covered with a black plastic film without contact to prevent the scion from being crushed. No water is needed during the grafting healing period, and the film can be removed regularly to allow ventilation and light.

[0017] Furthermore, in step (3), the specific management of the grafting healing period is as follows: the first day after grafting, cover with opaque plastic film to prevent moisture evaporation and cause death of the scion; 2-4 days after grafting, ventilate and let light in for 0.5h to 4h every day; 4-8 days after grafting, gradually increase the ventilation and light time every day, the ventilation time should not be too long, and it is best not to exceed the critical wilting of the scion; after 8 days of grafting, remove the plastic film; the temperature during the grafting healing period is slightly higher than the normal culture temperature, 26-28°C during the day and 18-20°C at night.

[0018] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0019] First, the present invention develops a simple grafting and healing device for recycling discarded plastic bottles, which can recycle discarded plastic bottles to create value and reduce plastic pollution. The simple grafting and healing device of the present invention has a wide range of applications, and can be used for various seedlings in plug trays, and the effect of cultivating seedlings is better than that of seedlings in plug trays.

[0020] (1) It can effectively solve or alleviate the environmental pollution caused by disposable plastic bottles and recycle waste plastic bottles to create new recycling value;

[0021] (2) Discarded plastic bottles are easy to obtain and can be used in various shapes and capacities. They are widely applicable to seedlings, not only to cucurbitaceous plants such as watermelon, melon, pumpkin, gourd, but also to plug-type seedling plants, thus reducing production costs.

[0022] (3) Plastic bottles are generally made of transparent plastic. Using transparent plastic bottles as a simple grafting and healing device allows intuitive observation of the root growth potential of the plant. Compared with plug tray seedling cultivation, the soil moisture stratification phenomenon can be intuitively observed. Plug tray seedling cultivation often results in moist surface soil and dry soil at the root tip, which causes the death of young roots and root hairs. The simple grafting and healing device uses cotton thread to absorb water from the lower bottle body through capillary absorption. The plant absorbs the required water according to the growth vitality to keep the soil moisture content of the matrix stable, which is not affected by human factors and causes excessive dryness or excessive wetness.

[0023] (4) Compared with seedling cultivation in plug trays, the simple grafting healing device has a large capacity, sufficient space for root development, and the soil moisture content of the root system is always in an appropriate state, which helps to improve the seedling index;

[0024] The lower half of the discarded plastic bottle is used as a water storage tank, which can keep the soil moisture content stable for a long time. Compared with plug tray seedlings, it does not require frequent watering, which reduces labor. In the early stage of healing of grafted seedlings in plug tray seedlings, it is necessary to manually wipe the water vapor on the stuffy box every day, while the simple grafting healing device only needs to remove the film for ventilation and light, which also reduces labor.

[0025] Second, the expected benefits and commercial value after the conversion of the technical solution of the present invention are: Since discarded plastic bottles are easy to obtain and the cost is extremely low, converting them into a simple grafting and healing device can greatly reduce the cost of seedling cultivation. This device has a wide range of applications and can be used for plug tray seedling cultivation of a variety of plants. With the increasing demand for environmental protection and efficient seedling cultivation, the market potential is huge. Whether it is large-scale seedling cultivation by seedling companies or small-scale planting and seedling cultivation by farmers, there will be a demand for such low-cost, high-efficiency devices. While greatly reducing plastic pollution, the device can also be further processed on the basis of the invention, such as stabilizing the lower part in series, so that it has a better large-scale production effect, and the income can be increased by selling the device or improving the quality of seedlings during the seedling cultivation process, which has considerable economic returns.

[0026] The technical solution of the present invention fills the technical gap in the industry at home and abroad: in the current seedling field, most of them rely on traditional plastic plug tray seedling cultivation and related auxiliary equipment, while the application of recycling discarded plastic bottles into simple grafting and healing devices is almost blank. The present invention opens up new uses for discarded plastic bottles in seedling cultivation and provides a new and environmentally friendly solution for seedling cultivation technology. There is no similar technical solution that fully utilizes discarded plastic bottles for seedling cultivation and has multiple advantages.

[0027] The technical solution of the present invention solves a technical problem that people have been eager to solve but have never been successful: for a long time, plastic pollution in the seedling raising process, poor quality and easy damage of plug trays, and difficulty in accurately controlling soil moisture during seedling raising have been plaguing the seedling raising industry. People have always hoped to find a method that is both environmentally friendly and efficient in seedling raising. The simple grafting and healing device of the present invention not only solves the problem of plastic pollution by using discarded plastic bottles, but also effectively solves many problems in seedling raising through unique designs, such as cotton thread capillary water absorption to stabilize soil moisture content, and transparent bottle body that can visually observe soil moisture stratification phenomenon.

[0028] The technical solution of the present invention overcomes technical prejudice: the traditional concept is that seedling equipment needs to be specially designed and manufactured, and not enough attention is paid to the reuse of waste materials for seedling cultivation. In addition, in terms of watering methods, people are accustomed to watering from the top of the plants and ignore the problem of soil moisture stratification, which can easily cause sunburn on the seedlings. The present invention breaks this technical prejudice, uses discarded plastic bottles for re-creation, and changes the watering method to provide moisture from the bottom through capillary absorption, providing a new idea for seedling cultivation technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the structure of a grafting healing device for recycling discarded plastic bottles provided by an embodiment of the present invention;

[0030] Figure 2 It is a flow chart of a grafting healing method of a grafting healing device for recycling discarded plastic bottles provided by an embodiment of the present invention;

[0031] Figure 3 This is an example diagram of a grafting and healing device for recycling discarded plastic bottles provided by an embodiment of the present invention; A is a watermelon seedling; B is a melon; C is a visualized root system development diagram;

[0032] Figure 4 It is a schematic diagram of an actual application scenario provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] Embodiment 1: Application in fruit tree seedling grafting

[0035] During the grafting process of fruit tree seedlings (such as apples or citrus), the traditional method requires frequent monitoring of water supply to prevent the grafted part from drying up due to lack of water. The abandoned plastic bottle grafting healing device implemented by the present invention is applied to the grafting of fruit tree seedlings. First, the stock and scion are cultivated in the plastic bottles in the upper part of the device respectively to ensure the healthy growth of the scion and stock. When performing the grafting operation, the automatic moisture management system provided by the device is used to continuously provide a stable water source for the cultivation matrix through the cotton strip water absorption structure. There is no need for frequent watering during the entire grafting healing period, and the water storage tank in the device ensures that the water remains sufficient during the grafting period. This method significantly improves the success rate of fruit tree grafting and reduces the moisture management work in traditional operations, especially in arid or unstable climatic conditions.

[0036] Example 2: Application in Grape Seedling Grafting

[0037] When grape seedlings are grafted, maintaining the humidity of the grafted part is crucial for successful healing. With the grafting healing device of the present invention, the rootstock and scion can be placed in the cultivation matrix of the upper part of the plastic bottle for cultivation in the initial seedling raising stage. During grafting, the cultivation matrix of the upper part is turned upside down on the water storage tank to ensure the close combination of the scion and the rootstock, while the cotton strips automatically absorb water to provide stable water support. This method effectively maintains the humidity and water supply required for healing during the grafting process of the grape seedlings, avoiding the risk of drying and damage to the grafted part. In addition, the reusable characteristics and low cost of the plastic bottle device make it an ideal auxiliary tool for grape grafting, which is particularly suitable for small-scale or family-level orchard management.

[0038] like Figure 1 As shown, an embodiment of the present invention provides a grafting and healing device for recycling discarded plastic bottles. The discarded plastic bottles are immersed in 5% sodium hypochlorite for disinfection for 30 minutes or sprayed with 75% medical alcohol for disinfection, and then washed with tap water and dried; the dried plastic bottle body is cut in a ratio of 3:7 or 4:6, the bottle cap is punched with a sharp tool, a cotton strip with a diameter close to the diameter of the bottle cap hole is passed through the hole in the bottle cap to facilitate soil water absorption, and the upper half of the bottle body is turned upside down on the lower half of the upright bottle body.

[0039] Furthermore, the diameter of the discarded plastic bottles shall not be less than 5CM.

[0040] Further, the diameter of the hole is 4 mm-9 mm.

[0041] Furthermore, the inverted upper part of the bottle body is used to fill the cultivation medium, and the lower part of the bottle body is used as a water storage tank, and the amount of water added does not exceed the inverted bottle cap or does not exceed 2 / 3 of the upright bottle body.

[0042] The embodiment of the present invention provides a grafting healing device for recycling discarded plastic bottles, which utilizes the physical structure and reusable characteristics of discarded plastic bottles to transform them into a healing auxiliary device for grafted plants. First, the discarded plastic bottles are disinfected by soaking in 5% sodium hypochlorite for 30 minutes or spraying with 75% medical alcohol to ensure that there are no bacteria on their surface to prevent infection during the plant grafting process. After being washed with tap water and dried, the plastic bottles can enter the cutting step. The bottle body is cut in a ratio of 3:7 or 4:6, and the upper and lower parts of the bottle body will be used as containers for the cultivation medium and water storage tanks, respectively.

[0043] Use a sharp tool to punch a hole in the cut bottle cap, with the diameter of the hole ranging from 4mm to 9mm. A cotton strip with a diameter close to the hole is inserted through the hole. The cotton strip acts as a water absorber and can transfer the water in the water tank to the cultivation substrate in the upper part through capillary action, thereby continuously providing moisture for the grafted plants. This design effectively solves the problem of uneven water supply during the grafting process, avoids the need for frequent manual water replenishment, and ensures stable humidity conditions during the grafting process.

[0044] The upper part of the bottle is inverted on the lower part, forming a simple grafting healing system. The inverted upper part of the bottle serves as a container for the cultivation medium, which can be filled with soil or other suitable cultivation materials to fix the grafted plants and maintain a moist environment for the roots of the plants. The lower part serves as a water storage tank, with a water storage capacity not exceeding the height of the inverted bottle cap or 2 / 3 of the upright bottle. The water is slowly transferred to the cultivation medium above through the cotton strip that passed through the bottle cap to maintain a suitable humidity.

[0045] The working principle of the device is simple and efficient. It uses discarded plastic bottles to achieve automated water management during the graft healing process, reducing the trouble of frequent watering in traditional manual operations and maintaining a stable grafting environment. The water in the device is gradually absorbed by the cotton strips and slowly released into the cultivation matrix, ensuring the water supply and environmental humidity during the healing process of the grafted plants, which helps to improve the success rate of grafting.

[0046] like Figure 2 As shown, a grafting healing method of a grafting healing device for recycling discarded plastic bottles provided by an embodiment of the present invention comprises the following steps:

[0047] (1) Raising scions and rootstocks in a grafting healing device;

[0048] (2) grafting of scion and stock in a graft healing device;

[0049] (3) Management of the graft healing period in the graft healing device.

[0050] The grafting healing method of the grafting healing device for recycling discarded plastic bottles provided in an embodiment of the present invention achieves the success of plant grafting through a series of steps. First, the seedling raising of the scion and the rootstock is carried out in the grafting healing device. Before grafting, the rootstock and the scion are respectively raised in the cultivation matrix of the device. The cultivation matrix (such as soil or other substitutes) is kept moist by the water supply in the water storage tank, ensuring that the scion and the rootstock get sufficient water and nutrition in the early seedling raising stage, promoting growth, and preparing for subsequent grafting.

[0051] The next step is the grafting of the scion and the rootstock. After the scion and the rootstock have reached a suitable growth state, the traditional grafting operation is carried out to tightly combine the cuts of the scion and the rootstock and place them in the healing device. At this time, the plastic bottle in the upper part is filled with the cultivation substrate, providing a stable environment to fix the grafting site and prevent external interference. Through the previously designed water supply system, the water from the water storage tank is transferred to the cultivation substrate above by the cotton strips to ensure the humidity and appropriate water supply of the grafting site. The entire device provides a closed and stable environment, which helps to reduce the impact of the external environment on the grafting healing.

[0052] Management of the graft healing period is key to ensuring a successful graft. During this stage, the device continuously provides the scion and rootstock with the right amount of moisture through an automated moisture management system, avoiding the need for frequent watering during traditional grafting. The grafting site requires higher humidity and temperature to promote cell division and growth, and the device ensures the maintenance of this environment through a water tank and sliver system. In addition, the closed design of the device can avoid interference from external environmental factors such as wind, rain, and dryness during the grafting process.

[0053] During the entire graft healing process, the device for recycling discarded plastic bottles greatly improves the success rate of grafting with its simple structure and automated water management, while reducing the frequency of manual intervention. The water supply during the graft healing process is gradually released through the cotton strip system to ensure the full healing of the scion and the rootstock. After the graft healing period is over, the successfully grafted plants can grow healthily. The device plays a key auxiliary role in the grafting process.

[0054] Furthermore, in step (1), the scion and rootstock seeds are disinfected with 5% sodium hypochlorite for 10 minutes, washed with tap water, soaked in 55-60°C warm water until the seeds reach room temperature for 6-8 hours; germinated at a constant temperature of 30°C until the radicle is white, and then sown in a simple grafting healing device; and grafted when the first true leaf is flat.

[0055] Furthermore, in step (2), monocotyledon grafting is adopted, and the scion is beveled at an angle of 30° 1 cm below the base of the cotyledon, and the cut surface is smooth; the rootstock is beveled at an angle of 30° at the base of the cotyledon, and a piece of cotyledon and all growth points are removed, and the cut surface is smooth; the cut surfaces of the rootstock and the scion are tightly fitted and fixed with a grafting clamp.

[0056] Furthermore, the blades and grafting clips used need to be disinfected with 75% medical alcohol in advance and used after being dried naturally.

[0057] Furthermore, in step (3), the grafted seedlings are placed in an open space and covered with a black plastic film without contact to prevent the scion from being crushed. No water is needed during the grafting healing period, and the film can be removed regularly to allow ventilation and light.

[0058] Furthermore, in step (3), the specific management of the grafting healing period is as follows: the first day after grafting, cover with opaque plastic film to prevent moisture evaporation and cause death of the scion; 2-4 days after grafting, ventilate and let light in for 0.5h to 4h every day; 4-8 days after grafting, gradually increase the ventilation and light time every day, the ventilation time should not be too long, and it is best not to exceed the critical wilting of the scion; after 8 days of grafting, remove the plastic film; the temperature during the grafting healing period is slightly higher than the normal culture temperature, 26-28°C during the day and 18-20°C at night.

[0059] The embodiment of the present invention provides a grafting and healing device for recycling discarded plastic bottles and its application in recycling discarded plastic bottles.

[0060] The embodiment of the present invention provides a grafting healing device for recycling discarded plastic bottles and its application in cultivating scions and rootstock seedlings.

[0061] like Figure 3 As shown, an application of a grafting healing device for recycling discarded plastic bottles provided by an embodiment of the present invention in the healing of grafted seedlings. Figure 3 A is a watermelon seedling; Figure 3 B is melon; Figure 3 C is for visualization of root development.

[0062] The embodiment of the present invention provides a grafting healing device for recycling discarded plastic bottles for use in visually observing the development of the root system of grafted seedlings.

[0063] The present invention is mainly used in the field of seedling cultivation. In terms of related products, its core product is a simple grafting and healing device created by recycling discarded plastic bottles. This device can replace the traditional plastic plug tray seedling cultivation method. It is applicable to all kinds of plug tray seedlings, such as cucurbitaceae plants such as watermelon, melon, pumpkin, gourd, and other plants that can be grown in plug trays. In the seedling cultivation process, it has a certain relationship with traditional seedling auxiliary products such as plastic trays and stuffy boxes, but it has unique advantages. It can be used as a separate seedling cultivation device, and it can also be used in conjunction with other traditional seedling cultivation equipment. In the seedling cultivation industry, whether it is a large-scale seedling cultivation enterprise or a small farmer's seedling cultivation operation, the device can be used to carry out efficient and environmentally friendly seedling cultivation.

[0064] The following is relevant evidence of the technical effect obtained by the embodiments of the present invention:

[0065] 1. Environmental aspects

[0066] 1. Plastic pollution reduction

[0067] Statistics show that the seedling industry uses a large number of plastic plug trays, which cause pollution after being discarded. The present invention uses discarded plastic bottles, which can be proved by investigating the discharge of discarded plastics before and after the seedling enterprises use the device and collecting plastic bottle pollution at the source of plastic bottles.

[0068] 2. Resource Reuse

[0069] Discarded plastic bottles are widely available and easy to obtain at a low cost. A large number of discarded plastic bottles can be found in urban garbage recycling data. The present invention converts them into useful seedling raising devices, thus realizing the recycling of resources.

[0070] 2. Seedling cultivation effect

[0071] 1. First, it has a wide range of applications and is convenient for controlling soil moisture. For example, it can be used for cucurbitaceae plants such as watermelon, melon, and pumpkin, and can also be extended to other crops to reflect its potential value. Comparative test data show that in traditional plug tray seedling cultivation, watering from the top of the plant often results in moist surface soil and dry soil at the root tip, causing the death of young roots and root hairs. The present invention can stabilize soil moisture by capillary absorption of water from the lower bottle body through cotton thread. Data from measuring soil humidity at different depths under two seedling cultivation methods using a soil moisture sensor show that in the same time period, the surface humidity of the soil in traditional plug tray seedling cultivation can reach 80%, while the humidity at the root tip is only 30%; the humidity of each layer of soil in the device of the present invention fluctuates between 50% and 60%, remaining relatively stable.

[0072] 2. The second is root development. Root system research experiments show that the simple grafting and healing device of the present invention has a large capacity and sufficient space for root development. By digging out a certain number of plant roots grown using traditional plug trays and the device of the present invention for comparison, it was found that the root systems of plants grown using the device were more developed, and the root length, root surface area, and thickness were all better than those of traditional plug trays. After measurement, the average root length of pumpkin seedlings grown using traditional plug trays was 45 cm and the root surface area was 8.5 cm after 15 days of grafting. 2 The average root length of watermelon seedlings grown using the device of the present invention is 66 cm, and the root surface area is 15 cm 2 (Data were counted for no less than 10 biological replicates).

[0073] 3. Finally, it is possible to reduce labor input, and record the labor input time in the process of seedling cultivation using traditional plug trays and the device of the present invention. For example, in terms of watering and maintenance, in the early stage of healing of grafted seedlings in traditional plug trays, it is necessary to manually wipe the water vapor on the stuffy box every day, while using the device of the present invention, it is only necessary to remove the film for ventilation and light transmission. In a seedling raising cycle, the first 7 days after grafting of traditional plug tray seedlings are calculated based on 50-hole plug trays and 20 trays, and it takes 8 hours for operations such as wiping water vapor and frequent watering, while the device of the present invention only takes 3 hours for operations such as removing the film for ventilation.

[0074] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A grafting and healing device for recycling discarded plastic bottles, characterized in that: Soak discarded plastic bottles in 5% sodium hypochlorite for 30 minutes or spray with 75% medical alcohol for disinfection, wash with tap water and dry; cut the dried plastic bottle body in a ratio of 3:7 or 4:6, punch holes in the bottle cap with a sharp tool, pass a cotton swab with a diameter close to the diameter of the bottle cap hole through the hole in the bottle cap to facilitate soil water absorption, and turn the upper half of the bottle body upside down on the lower half of the upright bottle body.

2. The grafting and healing device for recycling discarded plastic bottles as claimed in claim 1, characterized in that: The diameter of discarded plastic bottles should not be less than 5CM.

3. The grafting and healing device for recycling discarded plastic bottles as claimed in claim 1, characterized in that: The diameter of the hole is 4mm-9mm.

4. The grafting and healing device for recycling discarded plastic bottles as claimed in claim 1, characterized in that: The inverted upper part of the bottle body is used to fill the cultivation medium, and the lower part of the bottle body is used as a water storage tank. The amount of water added shall not exceed the inverted bottle cap or shall not exceed 2 / 3 of the upright bottle body.

5. A grafting healing method of the grafting healing device for recycling discarded plastic bottles as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: (1) Raising scions and rootstocks in a grafting healing device; (2) grafting of scion and stock in a graft healing device; (3) Management of the graft healing period in the graft healing device.

6. The grafting healing method of the grafting healing device for recycling discarded plastic bottles as claimed in claim 5, characterized in that: In step (1), the scion and rootstock seeds are disinfected with 5% sodium hypochlorite for 10 minutes, washed with tap water, soaked in 55-60°C warm water until the seeds reach room temperature for 6-8 hours; germinated at a constant temperature of 30°C until the radicle is white, and then sown in a simple grafting healing device; and grafted when the first true leaf is flat.

7. The grafting healing method of the grafting healing device for recycling discarded plastic bottles as claimed in claim 5, characterized in that: In step (2), monocotyledon grafting is adopted, the scion is beveled at 30° 1 cm below the base of the cotyledon, and the cut surface is smooth; the rootstock is beveled at 30° at the base of the cotyledon, a piece of cotyledon and all growth points are removed, and the cut surface is smooth; the cut surfaces of the rootstock and the scion are closely fitted and fixed with a grafting clamp.

8. The grafting healing method of the grafting healing device for recycling discarded plastic bottles as claimed in claim 7, characterized in that: The blades and grafting clips used need to be disinfected with 75% medical alcohol in advance and used after drying naturally.

9. The grafting healing method of the grafting healing device for recycling discarded plastic bottles as claimed in claim 5, characterized in that: In step (3), the grafted seedlings are placed in an open space and covered with a black plastic film without contact to prevent the scion from being crushed. No water is needed during the grafting healing period, and the film is removed regularly to allow ventilation and light.

10. The grafting healing method of the grafting healing device for recycling discarded plastic bottles as claimed in claim 5, characterized in that: The specific management of the grafting healing period in step (3) is as follows: according to the first 1 day after grafting, cover with opaque plastic film to prevent water evaporation and cause death of the scion; 2-4 days after grafting, ventilate and let light in for 0.5h to 4h every day; 4-8 days after grafting, gradually increase the ventilation and light time every day, and the ventilation time should not be too long, so as not to exceed the critical wilting of the scion. After 8 days of grafting, remove the plastic film; the temperature during the grafting healing period is slightly higher than the normal culture temperature, 26-28°C during the day and 18-20°C at night.

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