Flue-cured tobacco transplanting method integrating water-retaining agent slow release function and cup protection function

Abstract

The invention discloses a flue-cured tobacco transplanting method integrating a water-retaining agent slow release function and a cup protection function, and relates to the technical field of flue-cured tobacco cultivation, and the flue-cured tobacco transplanting method comprises the steps of preparation before transplanting, water-retaining agent gel preparation, tobacco seedling root dipping transplanting, tobacco seedling transplanting cup installation, cup management and flue-cured tobacco transplanting cup removal. According to the method, the water-retaining agent and the cups are in synergistic interaction, the water-retaining agent continuously and slowly releases water and nutrients, slow seedling recovery of tobacco seedlings due to water and fertilizer shortage is avoided, soil can be kept moist, and water evaporation is reduced; the cups can physically isolate low temperature, strong wind, rainstorm and other bad climates and block pest gnawing so as to reduce the risk of pest and disease damage, the formed local small environment can increase the soil temperature and promote tobacco seedling root development, the combination of the two can guarantee water nutrient supply and provide stable protection, the flue-cured tobacco transplanting survival rate and the early-stage growth quality are remarkably improved, and the survival rate is increased. The later-stage tobacco yield and quality improvement is facilitated.

Description

Technical Field

[0001] This invention relates to the field of flue-cured tobacco cultivation technology, and in particular to a flue-cured tobacco transplanting method that integrates the slow-release function of water-retaining agent and the protective function of the cover cup. Background Technology

[0002] The transplanting period of flue-cured tobacco is the primary and crucial stage in the field growth of tobacco, directly determining the root establishment efficiency and nutrient absorption capacity, which in turn has a critical impact on subsequent yield formation, quality grade, and overall economic benefits. In recent years, major tobacco-growing areas in my country (especially mountainous and plateau regions) have frequently encountered "spring drought" during the tobacco transplanting period. Moreover, most tobacco-growing areas lack a stable water supply, and the cost of manual irrigation or temporary drip irrigation equipment is high, making it difficult for small-scale growers to afford. As a result, flue-cured tobacco generally faces a water shortage crisis during the transplanting stage.

[0003] Insufficient water supply during the tobacco transplanting period will not only lead to a significant decrease in transplant survival rate, but also cause deformed leaf development and abnormal nicotine accumulation, directly reducing the proportion of high-quality tobacco and seriously affecting the economic benefits of growers. Conventional tobacco transplanting techniques mainly include two methods: transplanting seedlings on plastic film and transplanting seedlings under plastic film. To cope with drought, both methods require frequent manual watering or the installation of drip irrigation systems, which not only increases labor input and production material costs, but also has problems such as low water use efficiency, poor heat preservation effect, and difficulty in pest and disease control. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, the present invention provides a method for transplanting flue-cured tobacco that integrates the slow-release function of water-retaining agent and the protective function of the cover cup.

[0005] To achieve the above objectives, the present invention provides a method for transplanting flue-cured tobacco seedlings that integrates the slow-release function of a water-retaining agent and the protective function of a protective cup, comprising the following steps: Preparation before transplanting: Prepare the soil by making ridges and select healthy, disease-free tobacco seedlings; Preparation of water-retaining agent gel: Soak the soil water-retaining agent to prepare a secondary gel; Tobacco seedling root-dipping transplanting: Mix the secondary gel agent with the seedling substrate evenly to obtain a paste. Dip the roots of the tobacco seedlings to be transplanted into the paste before transplanting. After transplanting, water and cover with dry fine soil. At the same time, apply fertilizer. The fertilizer should not come into direct contact with the secondary gel agent during application. Installation of tobacco transplanting cover cup: Select a light-transmitting tobacco transplanting cover cup. After the tobacco seedlings are transplanted, place the cover cup over the seedlings and fix it in place. The cover cup is provided with ventilation and drainage holes. Cover cup management; adjust the cover cup according to environmental conditions to achieve ventilation and humidity control, and gradually expand the ventilation opening according to the growth of tobacco seedlings until the cover cup is completely removed; Removal of the cover cup for flue-cured tobacco transplanting: Remove the cover cup 2-3 weeks after transplanting when the tobacco seedlings have survived and grown new leaves.

[0006] Preferably, the land preparation and ridging includes land preparation and ridging before transplanting tobacco seedlings to ensure soil transport and moisture; The tobacco seedlings were transplanted with soil attached to their roots.

[0007] Preferably, the soil water-retaining agent is an acrylamide-acrylate copolymer crosslinker, and the dry adhesive particles of the soil water-retaining agent have a particle size of less than 0.3 mm; When planting each tobacco seedling in the field, the row spacing should be 120cm and the plant spacing should be between 55 and 60cm. The soil pH value of the application site should be between 5.2 and 6.5.

[0008] Preferably, the secondary gelling agent is prepared as follows: According to the ratio of 1 kg of soil water-retaining agent to 60 liters of volume burlap sack, soak it in water for 10-12 hours until the water absorption ratio is 40 to make a first-level gel agent; put the first-level gel agent into water and stir continuously until the water absorption ratio is 100% to obtain a second-level gel agent. The water used for preparation is water with a pH value between 6.5 and 7.5, and if the air temperature is below 18°C ​​during preparation, the water temperature should be maintained at 38-39°C.

[0009] Preferably, when transplanting flue-cured tobacco seedlings, the volume ratio of the secondary gelling agent to the tobacco floating seedling substrate is 1:0.9. After transplanting, each seedling is watered with 0.45 liters of water. After the water is absorbed by the soil in the pond, a layer of dry fine soil 1-1.2 cm thick is then applied.

[0010] Preferably, the fertilizer is a mixture of tobacco-specific compound fertilizer and farmyard manure, applied in a ring around the tobacco seedlings and covered with soil, and the seedlings are not watered for 20 days after transplanting.

[0011] Preferably, the tobacco transplanting cover is a transparent plastic cover with a diameter of 20cm and a height of 30cm.

[0012] Preferably, when the cup is installed, the lower end of the cup is inserted into the soil 3-5cm and the surrounding soil is compacted to fix it in place; The ventilation and drainage holes of the cup have a diameter of 0.5 cm.

[0013] Preferably, the method of adjusting the cover cup according to the environment includes: opening the cover cup for ventilation when the temperature inside the cover cup exceeds 35°C on sunny days; checking the moisture level inside the cover cup after thunderstorms to prevent the tobacco seedlings from becoming waterlogged; adding drainage and ventilation holes to the cover cup during rainy weather; reducing the number of drainage and ventilation holes to the cover cup during drought; and increasing the ventilation time of opening the cover cup if the tobacco seedlings and leaves turn yellow, wilt, or have excessive stem growth.

[0014] Preferably, when the bra cup is reused, the bra cup is disinfected.

[0015] Based on this, the beneficial effects of the present invention are as follows: This invention combines a water-retaining agent with a protective cup, providing dual benefits from both the root and above-ground parts of the tobacco plant: the water-retaining agent can absorb 150-500 times its own weight in water, forming a "miniature reservoir" at the roots for continuous, slow-release water supply. It also improves soil quality, enhances fertilizer efficiency, and is biodegradable. The protective cup creates a miniature greenhouse, raising the internal temperature by 3-5°C and maintaining humidity at 70-80%, reducing water evaporation. It also provides wind, insect, and hail protection, high light transmittance to ensure photosynthesis, and filters strong sunlight to prevent scorching. The synergistic effect of these two components eliminates the need for additional irrigation or drip irrigation, effectively solving the problem of water shortage during transplanting in arid tobacco areas. This results in a near 100% survival rate for flue-cured tobacco, reducing labor by 30% per acre and saving over 50% of water. Simultaneously, it optimizes the seedling growth environment, ensuring both yield and quality of flue-cured tobacco, achieving water-saving, labor-saving, environmentally friendly, and increased production. Attached Figure Description

[0016] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 The flowchart illustrates a method for transplanting flue-cured tobacco according to one embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms "a," "the," and "the" as used in the embodiments of this application are also intended to include the plural forms unless the context clearly indicates otherwise.

[0019] It should be understood that although the terms first, second, third, etc., may be used to describe related structures in the embodiments of this application, these related structures should not be limited to these terms. These terms are only used to distinguish related structures from each other.

[0020] Depending on the context, the word "if" as used here can be interpreted as "when" or "when". Similarly, depending on the context, the phrase "if determined" can be interpreted as "when determined" or "when (the condition or event of the statement) is detected".

[0021] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is formed "upper" or "lower" of another element, it can not only be formed directly "upper" or "lower" of the other element, but also indirectly "upper" or "lower" of the other element through an intermediate element.

[0022] Figure 1 A flowchart illustrating one embodiment of the flue-cured tobacco transplanting method of the present invention is shown below. Figure 1 As shown: Example 1: Transplanting flue-cured tobacco seedlings in arid mountainous tobacco-growing areas: (1) Overview of the experimental plot: The experimental plot was located in a mountainous tobacco-growing area in Qujing City, Yunnan Province. The soil type was sandy loam, with a pH of 5.8, an organic matter content of 1.6%, and a bulk density of 1.2 g / cm³. 3 The region receives an average annual rainfall of 800 mm. During the transplanting season (March-April), spring droughts are common, with diurnal temperature variations exceeding 15°C and strong winds. In the past, conventional transplanting methods using plastic film resulted in a survival rate of approximately 75%.

[0023] (2) Transplanting steps: S01: Pre-transplanting treatment: One week before transplanting, prepare the land and make ridges. The plowing depth is 22cm. Apply 1800kg of decomposed organic fertilizer per mu. The ridge specifications are 28cm in height and 65cm in width. Select healthy tobacco seedlings that are 50 days old, 15cm tall, and 0.6cm in stem diameter. The seedlings should have a soil ball with a diameter of 6cm. Spray with 800 times diluted carbendazim solution one day before transplanting.

[0024] S02: Preparation of water-retaining agent and gelling agent. Acrylamide-acrylate copolymer crosslinking agent (potassium salt type) is selected as the water-retaining agent, with a dry gel particle size of 0.2mm. In mid-March, the ambient temperature was 15℃. When preparing the primary gelling agent, 1kg of water-retaining agent was placed in a 60-liter burlap sack and soaked in 38℃ warm water for 11 hours, achieving a water absorption ratio of 40. Then, tap water with a pH of 7.0 was added, and the mixture was stirred for 25 minutes to prepare a secondary gelling agent with a water absorption ratio of 100.

[0025] S03: Transplant tobacco seedlings by dipping their roots in the soil. The planting density is 120cm between rows and 58cm between plants, with 950 plants per acre. Mix the secondary gelling agent with the tobacco floating seedling substrate at a volume ratio of 1:0.9 to form a paste. Dip the roots of the tobacco seedlings in the paste before transplanting. Water each plant with 0.45 liters of water. After the water is absorbed, cover with 1.1cm of dry fine soil. Apply 0.18kg of a mixture of tobacco-specific compound fertilizer and well-rotted farmyard manure to each plant. The distance between the fertilizer and the gelling agent is 6cm.

[0026] S04: For tobacco transplanting, use a PVC transparent cup with a diameter of 20cm and a height of 30cm. Leave 5 ventilation holes of 0.5cm at the bottom and 9 ventilation holes of 0.3cm evenly distributed on the side. Immediately after transplanting, place the cup over the tobacco seedlings, insert the bottom into the soil 4cm, and compact the surrounding soil to ensure a firm seal.

[0027] S05: Cup management: On sunny days, uncover one side of the cup for ventilation at 10 am and cover it again at 6 pm; 8 days after transplanting, cut a 5cm round hole at the top of the cup, and enlarge it to 10cm after 12 days.

[0028] S06: Removal of cover cups for flue-cured tobacco transplanting: Remove the cover cups 20 days after transplanting (when the tobacco seedlings have grown 3 new leaves and are 28cm tall). During this period, regular inspections were conducted, and no problems such as water accumulation, seedling burn, or pests and diseases were found.

[0029] (3) Implementation results: Statistics 30 days after transplanting showed that the survival rate of flue-cured tobacco reached 99.2%, an increase of 24.2 percentage points compared with conventional transplanting methods; the average water consumption per mu decreased by 52%, and the labor cost decreased by 31%; the fresh weight of the tobacco seedling roots increased by 35% and the plant height increased by 22% compared with the control; the proportion of high-quality tobacco increased by 13% in the later stage, the average yield per mu increased by 10%, and the nicotine content was controlled within the suitable range of 1.8%-2.2%.

[0030] Example 2: Transplanting flue-cured tobacco seedlings in high-altitude areas with large temperature differences: (1) Overview of the experimental plot: The experimental plot was located in a plateau tobacco-growing area in Bijie City, Guizhou Province. The soil type was loam, with a pH of 6.2, an organic matter content of 1.8%, and a bulk density of 1.15 g / cm³. 3 The area is at an altitude of 1800m. During the transplanting period (April-May), the diurnal temperature range reaches 18℃, and the minimum nighttime temperature can drop to 5℃. There is also strong sunlight radiation. In the past, the transplanting method under plastic film was used, which resulted in a high rate of seedling scorching and a transplant survival rate of about 80%.

[0031] (2) Transplanting steps: S01: Pre-transplanting treatment: 5 days before transplanting, prepare the land and make ridges. The plowing depth is 24cm. Apply 2000kg of decomposed organic fertilizer per mu. The ridge specifications are 30cm high and 70cm wide. Select healthy tobacco seedlings with an age of 55 days, a plant height of 16cm, and a stem diameter of 0.7cm. The seedlings should have a soil ball with a diameter of 7cm. Spray with 1000 times diluted carbendazim solution before transplanting.

[0032] S02: Preparation of water-retaining agent and gelling agent. Acrylamide-acrylate copolymer crosslinking agent (potassium salt type) is selected as water-retaining agent. The dry gel particle size is 0.25mm. The ambient temperature in April is 17℃. When preparing the first-stage gelling agent, the water temperature is controlled at 39℃ and soaking is carried out for 12 hours. When preparing the second-stage gelling agent, tap water with a pH value of 6.8 is used and stirred for 30 minutes to ensure uniform gelation.

[0033] S03: Transplant tobacco seedlings after root dipping. The planting density is 120cm row spacing and 60cm plant spacing, with 900 plants per mu. After root dipping treatment, transplant the seedlings, water each plant with 0.45 liters of water, cover with 1.2cm of dry fine soil, apply 0.2kg of fertilizer per plant, and keep a 7cm distance between the fertilizer and the gelling agent.

[0034] S04: For tobacco transplanting, use transparent PP cups with a diameter of 20cm and a height of 30cm. The cups have a light transmittance of 92% and can filter 30% of ultraviolet rays. When installing, insert the bottom of the cup into the soil 5cm deep, compact it, and ensure good sealing to prevent cold air from entering at night.

[0035] S05: Cover cup management: On sunny and hot days, completely uncover the cover cup for ventilation and cover it in the evening; 7 days after transplanting, expand the ventilation opening and gradually uncover the top after 15 days.

[0036] S06: Remove the cover cup 25 days after transplanting. Due to the strong sunlight at high altitudes, no seedling scorching occurred. The temperature inside the cover cup was 4°C higher than the outside temperature at night, which prevented low-temperature freezing damage.

[0037] (3) Implementation results: The transplant survival rate reached 99.5%, an increase of 19.5 percentage points compared with the conventional method; the seedling scorching rate was 0%, a decrease of 8% compared with the control; the average labor cost per mu was reduced by 28%, and the water saving rate reached 55%; the content of aroma substances in tobacco leaves increased by 12% in the later stage, and the quality grade was significantly improved.

[0038] Example 3: Transplanting tobacco seedlings in rainy tobacco-growing areas: (1) Overview of the experimental plot: The experimental plot was located in a tobacco-growing area of ​​Chenzhou City, Hunan Province. The soil type was clay loam, the pH value was 5.5, the soil organic matter content was 1.7%, and the soil bulk density was 1.25 g / cm³. 3 The area experiences heavy rainfall during the transplanting season (May-June), which can easily lead to waterlogging and root rot, as well as frequent outbreaks of pests and diseases. In the past, the survival rate of conventional transplanting was approximately 85%.

[0039] (2) Experimental steps: S01: Pre-transplanting treatment: Add drainage ditches when preparing the land and making ridges. The ridge height is 30cm and the ridge spacing is 130cm to ensure smooth drainage. Apply 1600kg of decomposed organic fertilizer per mu. The tillage depth is 23cm. Select tobacco seedlings with an age of 48 days, a plant height of 14cm, and a stem diameter of 0.6cm. The seedlings should have a soil ball with a diameter of 6cm.

[0040] S02: Preparation of water-retaining agent and gelling agent. Acrylamide-acrylate copolymer crosslinking agent (potassium salt type) is selected as water-retaining agent. The dry gel particle size is 0.2mm. The temperature in May is 22℃. The gelling agent is prepared with room temperature tap water (pH 7.2). The primary gelling agent is soaked for 10 hours and the secondary gelling agent is stirred for 20 minutes.

[0041] S03: Flue-cured tobacco root-dipping transplanting, with a planting density of 120cm row spacing and 55cm plant spacing, 1000 plants per mu. After root-dipping and transplanting, water and cover with soil. Apply fertilizer at a rate of 0.16kg per plant, with a 5cm gap between fertilizer and gel agent.

[0042] S04: For tobacco transplanting, use a transparent PVC cover cup with four 0.8cm drainage holes at the bottom and six ventilation holes on the side. Insert the bottom of the cover cup into the soil 3cm to ensure unobstructed drainage.

[0043] S05: Protective cup management; check drainage promptly after rain to avoid water accumulation; expand ventilation openings 10 days after transplanting.

[0044] S06: Remove the cover cup 18 days after transplanting. No root rot occurred during this period, and the incidence of diseases and pests was reduced by 60% compared with the control.

[0045] (3) Implementation results: The transplant survival rate reached 99.0%, an increase of 14 percentage points compared with the conventional method; the waterlogging and root rot rate was 0.5%, a decrease of 8.5 percentage points compared with the control; water saving per mu was 48%, and labor costs were reduced by 25%; the yield per mu increased by 8% in the later stage, and the proportion of high-grade tobacco increased by 11%.

[0046] In the above three implementation methods, it should be noted that: 1. When the temperature inside the cup exceeds 35℃, open the cup for ventilation to prevent "scalding". In hot and sunny weather, the cup can be opened in the morning and covered in the evening to ensure that the temperature inside the cup is moderate.

[0047] 2. The bra cups need to be pressed firmly to prevent them from being blown over by the wind. After a heavy rain, check whether there is water accumulation inside the bra cups and drain the water in time to prevent flooding.

[0048] 3. After transplanting tobacco seedlings, it is necessary to check their growth regularly. If yellowing leaves, wilting, or disease occur, the cover cup should be removed immediately and remedial measures should be taken. At the same time, the usage method can be adjusted according to the local climate. For example, in rainy areas, drainage holes can be added to the cover cup to drain water in time and prevent water accumulation and root rot. In arid areas, drainage holes can be reduced on the cover cup to reduce ventilation and prolong the moisture retention time.

[0049] 4. If mold grows inside the cover cup after the tobacco seedlings are transplanted, it indicates insufficient ventilation or excessive humidity. You need to increase the number of ventilation holes and reduce watering. If the tobacco seedlings grow excessively in the cover cup, it indicates insufficient light. You can increase the ventilation and light exposure time by removing the cover cup. If pests invade, it indicates a problem with the seal of the cover cup. You need to check and improve the seal of the cover cup and spray a low-toxicity insecticide.

[0050] 5. The bra cups are reusable. When reusing them, they need to be sterilized and disinfected, such as by soaking them in carbendazim, to prevent the spread of germs. Waste plastic bra cups need to be recycled to avoid polluting the environment.

[0051] In summary, this invention, by adding a water-retaining agent, can form a "miniature reservoir" in the soil, which can store water and slowly release it for plant absorption and utilization, while reducing nutrient loss caused by irrigation or rainfall. At the same time, by constructing a physical barrier through the covering cup, it achieves multiple protections such as heat preservation, moisture retention, wind protection, insect protection, and hail protection, creating a stable growth environment for tobacco seedlings. On this basis, with reasonable management measures such as timely ventilation, drainage, and later removal of the covering cup, problems such as high temperature damage and waterlogging root rot can be effectively avoided, further improving the survival rate of transplanted tobacco seedlings and laying a good foundation for the subsequent growth of tobacco.

[0052] The above description is merely a preferred embodiment of the present invention. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to the specific combination of the above-described technical features, but should also cover other technical solutions formed by any combination of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

Claims

1. A method for transplanting flue-cured tobacco that integrates the slow-release function of a water-retaining agent and the protective function of a protective cup, characterized in that, The method includes the following steps: Preparation before transplanting: Prepare the soil by making ridges and select healthy, disease-free tobacco seedlings; Preparation of water-retaining agent gel: Soak the soil water-retaining agent to prepare a secondary gel; Tobacco seedling root-dipping transplanting: Mix the secondary gel agent with the seedling substrate evenly to obtain a paste. Dip the roots of the tobacco seedlings to be transplanted into the paste before transplanting. After transplanting, water and cover with dry fine soil. At the same time, apply fertilizer. The fertilizer should not come into direct contact with the secondary gel agent during application. Installation of tobacco transplanting cover cup: Select a light-transmitting tobacco transplanting cover cup. After the tobacco seedlings are transplanted, place the cover cup over the seedlings and fix it in place. The cover cup is provided with ventilation and drainage holes. Cup management; adjust the cup according to environmental conditions to achieve ventilation and humidity control, and gradually expand the ventilation opening according to the growth of tobacco seedlings until the cup is completely removed; Removal of the cover cup for flue-cured tobacco transplanting: Remove the cover cup 2-3 weeks after transplanting, when the tobacco seedlings have survived and grown new leaves.

2. The method for transplanting flue-cured tobacco integrating the slow-release function of water-retaining agent and the protective function of the cover cup according to claim 1, characterized in that, The land preparation and ridging includes preparing and ridging the land before transplanting tobacco seedlings to ensure soil transport and moisture; The tobacco seedlings were transplanted with soil attached to their roots.

3. The method for transplanting flue-cured tobacco integrating the slow-release function of water-retaining agent and the protective function of the cover cup according to claim 1, characterized in that, The soil water-retaining agent is an acrylamide-acrylate copolymer crosslinker, and the dry adhesive particles of the soil water-retaining agent have a particle size of less than 0.3 mm. When planting each tobacco seedling in the field, the row spacing should be 120cm and the plant spacing should be between 55 and 60cm. The soil pH value of the application site should be between 5.2 and 6.

5.

4. The method for transplanting flue-cured tobacco integrating the slow-release function of water-retaining agent and the protective function of the cover cup according to claim 1, characterized in that, The secondary gelling agent is prepared as follows: According to the ratio of 1 kg of soil water-retaining agent to 60 liters of volume burlap sack, soak it in water for 10-12 hours until the water absorption ratio is 40 to make a first-level gel agent; put the first-level gel agent into water and stir continuously until the water absorption ratio is 100% to obtain a second-level gel agent. The water used for preparation is water with a pH value between 6.5 and 7.5, and if the air temperature is below 18°C ​​during preparation, the water temperature should be maintained at 38-39°C.

5. The method for transplanting flue-cured tobacco integrating the slow-release function of water-retaining agent and the protective function of the cover cup according to claim 1, characterized in that, When transplanting flue-cured tobacco seedlings, the volume ratio of the secondary gelling agent to the tobacco floating seedling substrate is 1:0.

9. After transplanting, each seedling is watered with 0.45 liters of water. After the water is absorbed by the soil in the pond, a layer of dry fine soil 1-1.2 cm thick is then applied.

6. The method for transplanting flue-cured tobacco integrating the slow-release function of water-retaining agent and the protective function of the cover cup according to claim 1, characterized in that, The fertilizer is a mixture of tobacco-specific compound fertilizer and farmyard manure, applied in a ring around the tobacco seedlings and covered with soil. The seedlings are not watered for 20 days after transplanting.

7. The method for transplanting flue-cured tobacco integrating the slow-release function of water-retaining agent and the protective function of the cover cup according to claim 1, characterized in that, The tobacco transplanting cover is a transparent plastic cover with a diameter of 20cm and a height of 30cm.

8. The method for transplanting flue-cured tobacco integrating the slow-release function of water-retaining agent and the protective function of the cover cup according to claim 1, characterized in that, When installing the cup, insert the lower end of the cup into the soil 3-5cm and compact the surrounding soil to fix it in place; The ventilation and drainage holes of the cup have a diameter of 0.5 cm.

9. The method for transplanting flue-cured tobacco integrating the slow-release function of water-retaining agent and the protective function of the cover cup according to claim 1, characterized in that, The adjustment of the cover cup according to environmental conditions includes: opening the cover cup for ventilation when the temperature inside exceeds 35°C on sunny days; checking the moisture level inside the cover cup after thunderstorms to prevent overwatering of tobacco seedlings; adding drainage and ventilation holes to the cover cup during rainy weather; reducing the number of drainage and ventilation holes on the cover cup during drought; and increasing the ventilation time when tobacco seedlings and leaves turn yellow, wilt, or have excessive stem growth.

10. The method for transplanting flue-cured tobacco integrating the slow-release function of water-retaining agent and the protective function of the cover cup according to claim 1, characterized in that, When reusing the bra cup, the bra cup shall be disinfected.

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