A curing method for tobacco seedlings and a matching fertilizer device

Abstract

The present application relates to the field of flue-cured tobacco transplanting, and particularly relates to a flue-cured tobacco warm cellar type seedling transplanting method and a matching topdressing device, which comprises a water box, a fertilizer cylinder and a drilling head, a control box is fixedly installed on one side of the water box, a water adding pipe is communicated with the top of the water box, a communication folding pipe is communicated with the bottom of the water box, an electromagnetic valve one is installed at the communication position of the communication folding pipe and the water box, a sliding groove frame is fixedly installed on one side of the water box, and a discharging pipe is communicated with the bottom of the fertilizer cylinder. The present application firstly performs drilling after fertilization and ridging, then performs mulching in advance according to the soil, utilizes the mulching film to completely cover the ridge body well, maintains the temperature and humidity of the ridge body, avoids suffering from the influence of external climate, can increase the hole, and provides more growth space for the root system of tobacco seedlings. The present application optimizes the topdressing technology, adopts the method of mixing water and topdressing to topdress potassium nitrate seedling fertilizer through the matching topdressing device after sealing and soil covering, effectively improves the growth nutrient supply level of tobacco seedlings, and promotes the early growth of tobacco plants.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of flue-cured tobacco transplanting, in particular to a flue-cured tobacco warm cellar type seedling transplanting method and a matching topdressing device. BACKGROUND

[0002] Due to the limitation of ecological conditions, extreme weather often occurs during the production of flue-cured tobacco, especially during the period of tobacco seedling transplanting, adverse weather such as low temperature and rain or drought often occurs, and at the later stage of flue-cured tobacco growth, adverse weather such as autumn wind and rain also exists, which is one of the main risk factors restricting the sustainable development of current tobacco production. Transplanting is a key link in the production of flue-cured tobacco, and timely and scientific transplanting can achieve early growth of flue-cured tobacco. Transplanting time is one of the key measures for high quality and high yield of tobacco, and selecting the best transplanting time is a necessary condition for flue-cured tobacco to obtain high yield and high quality. If the water, temperature and other conditions cannot be guaranteed during the transplanting of tobacco seedlings, the normal growth of tobacco seedlings will be difficult to meet, and the tobacco seedlings will grow slowly, and even physiological water shortage and yield reduction will occur; if the transplanting of flue-cured tobacco is delayed to avoid the early drought and low temperature, the later stage will face the influence of temperature drop, which will cause the tobacco leaves to be unable to mature and turn yellow normally, and after curing, the tobacco leaves will have more green veins and ash smoke, and the quality will be poor, which will reduce the income of tobacco farmers and the industrial use value of tobacco leaves. The appropriate transplanting period can effectively utilize the climate conditions in the early stage and avoid the influence of adverse weather in the later stage, so that the whole growth period of flue-cured tobacco is in a relatively suitable climate, avoiding the influence of adverse weather, so as to ensure the normal development of tobacco seedlings and promote the formation of high quality tobacco leaves. At present, the early transplanting technology of tobacco seedlings widely used in tobacco production includes film mulching small seedling transplanting and cellar type small seedling transplanting technology, but it is easy to be affected by external adverse weather, and the early stage heat preservation effect is not ideal, especially due to the limitation of the size of the transplanting cellar, the root development of tobacco seedlings is hindered, and at the same time the nutrient utilization efficiency is low after the transplanting of tobacco seedlings, which cannot meet the growth and nutrition demand of tobacco seedlings, and the purpose of early growth of tobacco seedlings after transplanting cannot be achieved. SUMMARY

[0003] The purpose of the present application is to solve the problems in the background art, and a flue-cured tobacco warm cellar type seedling transplanting method and a matching topdressing device are provided.

[0004] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0005] A flue-cured tobacco warm cellar type seedling transplanting method, comprising the following steps:

[0006] S1: selecting tobacco seedlings: the age of the selected tobacco seedlings is 45-50 days, the stem height is 3-5 cm, and the tobacco seedlings have 4-6 true leaves, the size of the selected tobacco seedlings is uniform, and the tobacco seedlings need to be healthy, free of diseases and insect pests, free of mechanical damage, have developed roots and the substrate is not scattered;

[0007] S2: fertilization and ridging: about 30 days before transplanting, according to the soil condition, timely ridging, first in the center of the ridge ditch, and the ditch width is 18-20 cm, the ditch depth is 15-20 cm, after the ditch is opened, all base fertilizer is applied to the ridge bottom ditch, then the ridge is formed, the height of the ridge is 30-35 cm, the width of the ridge surface is 30-35 cm, the width of the ridge bottom is 80-90 cm, and the ridge body is trapezoidal shape, full and flat and no pit and sundries;

[0008] S3: cellar and film covering: after the ridge is formed, the water content in the field is 60%-70% before the film is covered, the cellar shape is cylindrical, the cellar depth is 19-20 cm, the cellar diameter is 13-15 cm, after the cellar is formed, the film is covered, the film is tightly attached to the ridge to completely seal the cellar, and the film edge around the ridge is compacted with fine soil;

[0009] S4: tobacco seedling transplanting: a small hole is punched on the film above the cellar opening, the diameter is about 6-8 cm, the size of the film opening is reduced to ensure the transplanting operation, the film opening is smaller than the cellar opening, then the seedling is vertically planted into the cellar from the film opening, a small amount of accompanying soil is brought in to cover the root of the seedling, and then a sufficient root fixing fertilizer water with a concentration of 0.5% is poured;

[0010] S5: expanding the hole and germinating: the tobacco seedling grows in the cellar under the film for about 10-15 days, when the tobacco seedling is about to touch the film, the film hole is expanded in time to promote the growth of the tobacco seedling and avoid the tobacco seedling being scalded by the film due to high temperature;

[0011] S6: sealing and topdressing: when the tobacco seedling grows to 7-8 leaves and the growth point of the tobacco seedling exceeds the film opening by 2-3 cm, the cellar is filled with a small amount of accompanying soil first, then the film opening is appropriately expanded, and the opening is sealed with the field soil, a virus prevention agent is sprayed before sealing, a matching topdressing device is used to topdress potassium nitrate seedling raising fertilizer by mixing with water, a deep 10 cm topdressing hole is punched between the two tobacco seedlings on the ridge, the fertilizer solution is applied to the hole at a dosage of 0.5 kg / hole, and then the topdressing hole is sealed with soil.

[0012] In the above-mentioned tobacco warm cellar type small seedling transplanting method and matching topdressing device, the tobacco seedling in the S1 seedling selection step requires pruning at least once before transplanting, and the seedling is dried for 3-5 days before water and fertilizer are cut off.

[0013] In the above-mentioned tobacco warm cellar type small seedling transplanting method and matching topdressing device, the solute of the nutrient solution in the S4 tobacco seedling transplanting step is potassium dihydrogen phosphate, and the application amount is controlled at 0.25 kg / hole.

[0014] In the tobacco warm cellar type seedling transplanting method and the matching topdressing device, the potassium nitrate in the potassium nitrate seedling raising fertilizer in the S6 sealing topdressing step is 5 kg per mu, and is prepared into an aqueous solution at a ratio of 1:100.

[0015] A matching topdressing device comprises a water box, a fertilizer cylinder and a drilling head, one side of the water box is fixedly provided with a control box, the top of the water box is communicated with a water adding pipe, the bottom of the water box is communicated with a communication folding pipe, an electromagnetic valve one is arranged at the communication position of the communication folding pipe and the water box, one side of the water box is fixedly provided with a sliding groove frame, the bottom of the fertilizer cylinder is communicated with a discharging pipe, an electromagnetic valve two is arranged at the communication position of the discharging pipe and the fertilizer cylinder, the outer side of the fertilizer cylinder is fixedly provided with a connecting block, the end of the connecting block away from the fertilizer cylinder is fixedly provided with a sliding block, the inside of the fertilizer cylinder is rotatably provided with a rotating rod, the outer side of the rotating rod is fixedly provided with a cross-shaped stirring rod, the outer side of the bottom end of the rotating rod is fixedly provided with a rotating ring one, the outer side of the rotating ring one is fixedly provided with a magnet one, the bottom of the fertilizer cylinder is fixedly provided with a driving motor, the output end of the driving motor is fixedly provided with a driving gear, the bottom of the fertilizer cylinder is fixedly provided with a cover cylinder, the bottom of the cover cylinder is communicated with a communication cylinder, the top of the drilling head is fixedly provided with a driven gear ring, the top of the inner cavity of the drilling head is fixedly provided with a rotating ring two, the inner side of the rotating ring two is fixedly provided with a magnet two, the outer side of the drilling head is provided with a discharging hole.

[0016] In the above-mentioned matching topdressing device, the end of the sliding block away from the connecting block is slidably arranged at the inner side of the sliding groove frame, the end of the communication folding pipe away from the water box is communicated with one side of the communication cylinder, the driven gear ring is arranged at the outer side of the end of the communication cylinder away from the cover cylinder through a bearing, and the outer side of the driving gear is engaged with the outer side of the driven gear ring.

[0017] In the above-mentioned matching topdressing device, the cross-shaped stirring rod is arranged at the inner side of the fertilizer cylinder, the outer side of the fertilizer cylinder is provided with a scale line, the fertilizer cylinder is transparent, the electromagnetic valve two and the discharging pipe are arranged at the inner side of the cover cylinder, the end of the magnet one away from the rotating ring one and the end of the magnet two away from the rotating ring two are both in an inclined shape, and the magnetic poles of the end of the magnet one away from the rotating ring one and the end of the magnet two away from the rotating ring two are the same.

[0018] In the above-mentioned matching topdressing device, the inside of the communication cylinder is fixedly provided with a stirring vertical rod, the end of the stirring vertical rod away from the communication cylinder extends to the inside of the drilling head, and the stirring vertical rod is arranged between the magnet two and the magnet one.

[0019] In the above-mentioned matching topdressing device, the two sides of the connecting block are both fixedly provided with a pressing and bending rod, the two sides of the end of the water box away from the sliding groove frame are both fixedly provided with a shoulder strap, and the inside of the top of the water adding pipe is clamped with a blocking plug.

[0020] Compared with the prior art, the warm cellar type seedling transplanting method for flue-cured tobacco and the matching fertilizer device have the advantages that:

[0021] 1. The hole for well cellar transplanting is appropriately enlarged, the hole is punched in advance, then the mulching film is covered, and then the hole is punched for transplanting, so that the temperature and humidity of the hole during transplanting can be fully ensured, and since the hole punched in the early stage of the tobacco seedling is always protected by the mulching film, the influence of excessive rain or drought and other sudden bad weather during transplanting can be well coped with, the heat preservation and humidity preservation effect is better than that of the current conventional transplanting mode, and the purpose of improving the ground temperature to realize early transplanting of flue-cured tobacco is truly achieved. In addition, the hole is appropriately enlarged, then the mulching film is covered in advance to ensure the temperature and humidity in the well cellar, and after the hole is sealed and the soil is cultivated, the root system of the tobacco plant has more growth space in the hole, and relatively more nutrient soil and field soil can also be applied in the hole for sealing, which has a good promoting effect on the early growth and development of the tobacco plant;

[0022] 2. The fertilizer application technology during the whole transplanting stage of the tobacco seedling is optimized, the two-time fertilizer application mode is adopted, the 0.5% potassium dihydrogen phosphate nutrient solution is applied as the root fixing fertilizer water during the transplanting of the tobacco seedling to promote root formation of the tobacco seedling, and the potassium nitrate seedling raising fertilizer is applied through the matching fertilizer device after the hole is sealed and the soil is cultivated to provide the required effective nutrients for the growth of the tobacco seedling in the early stage and promote rapid development to smoothly enter the rosette stage;

[0023] 3. After the drilling is completed, the drilling head is continuously placed in the hole, then the electromagnetic valve one and the electromagnetic valve two are opened through the control box, the water and the potassium nitrate seedling raising fertilizer particles are added into the inside of the drilling head through the electromagnetic valve one and the feeding pipe for mixing, the water mixing ratio and the fertilizer amount can be easily set according to the actual situation, the device automatically mixes and dissolves, the ratio of the fertilizer to the water can be accurately controlled, the concentration of the fertilizer meets the needs of different crops and growth stages, and the rotating drilling head can throw the fertilizer water into the inside of the fertilizer hole through the discharge hole, and the application effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a perspective structural schematic view of a matching fertilizer device provided in the application;

[0025] Figure 2 It is a bottom perspective structural schematic view of a matching fertilizer device provided in the application;

[0026] Figure 3 It is a partial one perspective structural schematic view of a matching fertilizer device provided in the application;

[0027] Figure 4 It is a partial two perspective structural schematic view of a matching fertilizer device provided in the application;

[0028] Figure 5 A partial three-dimensional structure schematic view of a complete topdressing device according to the present application.

[0029] In the figure: 1, water box; 2, fertilizer cylinder; 3, driving motor; 4, driving gear; 5, cover cylinder; 6, drilling head; 7, communication cylinder; 8, driven gear ring; 9, communication folding pipe; 10, rotating rod; 11, cross stirring rod; 12, connecting block; 13, downward bending rod; 14, water filling pipe; 15, plugging plug; 16, back strap; 17, discharge hole; 18, chute frame; 19, control box; 20, electromagnetic valve one; 21, rotating ring one; 22, magnet one; 23, sliding block; 24, stirring vertical rod; 25, rotating ring two; 26, magnet two; 27, discharging pipe; 28, electromagnetic valve two. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0031] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0032] A warm cellar type seedling transplanting method for flue-cured tobacco, comprising the following steps:

[0033] S1: selecting tobacco seedlings: the selected tobacco seedlings have a seedling age of 45-50 days, a stem height of 3-5 cm, and 4-6 true leaves, the selected tobacco seedlings are uniform in size, and need to be healthy in growth, free of pests and diseases, free of mechanical damage, have developed root systems, and have non-dispersed substrates, the tobacco seedlings are required to be pruned at least once before transplanting, and are required to be watered and fertilized for 3-5 days in advance;

[0034] S2: fertilizing and ridging: about 30 days before transplanting, ridges are formed in time according to the soil conditions, first, a ditch is formed in the center of the ridge, the ditch has a width of 18-20 cm and a depth of 15-20 cm, after the ditch is formed, all base fertilizer strips are applied to the ditch at the bottom of the ridge, and then the ridge is formed, the height of the ridge is 30-35 cm, the width of the ridge surface is 30-35 cm, the width of the ridge bottom is 80-90 cm, and the ridge body is in a trapezoidal shape, full and flat and free of pits, bumps and sundries;

[0035] S3: ditching and mulching: after the ridges are formed, when the field moisture content is 60%-70%, the ditching is performed on the ridges, the shape of the ditch is cylindrical, the depth of the ditch is 19-20 cm, the diameter of the ditch is 13-15 cm, and then the mulching film is applied to cover the ditch, the film is tightly attached to the ridges to completely seal the ditch, and the film edges around the ridges are compacted with fine soil;

[0036] S4: transplanting tobacco seedlings: a small hole with a diameter of about 6-8 cm is punched on the mulching film directly above the mouth of the ditch, the size of the hole is reduced to ensure the transplanting operation, and the size of the hole is ensured to be smaller than that of the mouth of the ditch, then the tobacco seedlings are vertically planted into the ditch from the hole of the mulching film, a small amount of accompanying soil is brought in to cover the roots of the tobacco seedlings, then a sufficient amount of rooting fertilizer solution with a concentration of 0.5% is applied, the solute of the nutrient solution is potassium dihydrogen phosphate, and the application amount is controlled at 0.25 kg / hole;

[0037] S5: expanding the hole and germinating: the tobacco seedlings are grown in the ditch under the mulching film for about 10-15 days, when the tobacco seedlings are about to touch the mulching film, the hole is expanded in time to promote the growth of the tobacco seedlings and avoid the tobacco seedlings being scalded by the mulching film due to high temperature;

[0038] S6: sealing and topdressing: when the tobacco seedlings grow to 7-8 leaves and the growth points of the tobacco seedlings exceed the hole of the mulching film by 2-3 cm, the ditch is first filled with a small amount of accompanying soil, then the hole of the mulching film is appropriately expanded, and the hole is sealed with the field soil, a virus prevention agent is sprayed before sealing, a matching topdressing device is used to topdress potassium nitrate seedling raising fertilizer in the form of water mixing, a deep 10 cm topdressing hole is punched between the two tobacco seedlings on the ridge, the fertilizer solution is applied into the hole at a dosage of 0.5 kg / hole, then the topdressing hole is sealed with soil, and the application amount of potassium nitrate in the potassium nitrate seedling raising fertilizer is 5 kg / mu, and the water solution is prepared at a ratio of 1:100.

[0039] The hole for transplanting the ditch is appropriately enlarged, the hole is punched in advance, then the mulching film is applied, and then the hole is punched for transplanting, which can fully ensure the temperature and humidity of the hole during transplanting, and because the hole punched in advance is protected by the mulching film, the effect of temperature and humidity preservation is better than that of the current conventional transplanting method, which truly achieves the purpose of improving the ground temperature and realizing early transplanting of flue-cured tobacco, in addition, appropriately enlarging the hole and then applying the mulching film in advance to ensure the temperature and humidity in the ditch, after the hole is sealed and the soil is cultivated, the root system of the tobacco plant has more space for growth and development, and a relatively large amount of nutrient soil and field soil can be applied in the hole for sealing, which has a good promoting effect on the early growth of the tobacco plant.

[0040] In addition, the fertilization technology is optimized during the whole transplanting stage of tobacco seedlings, and two times of fertilizer application are adopted. The first time is to apply 0.5% potassium dihydrogen phosphate nutrient solution as root fixing fertilizer when the tobacco seedlings are transplanted, so as to promote the rooting of the tobacco seedlings. The second time is to apply potassium nitrate as a topdressing fertilizer after the soil is covered, so as to provide the required effective nutrients for the growth of the tobacco seedlings in the early stage and promote the rapid development of the tobacco seedlings to enter the rosette stage.

[0041] During the pre-transplanting stage of the warm cellar type of flue-cured tobacco, the temperature of the microenvironment in the film is suitable, the growth of the tobacco plants is accelerated, the mature period is advanced, and the tobacco plants fully utilize the external environmental light and temperature conditions during the whole growth period. The dry matter accumulation of the tobacco plants is enriched, the appearance quality of the tobacco leaves is improved, and the chemical components are more coordinated.

[0042] Through the field experiment, the results are as follows:

[0043] Statistics of main agronomic characters of flue-cured tobacco in the rosette stage

[0044]

[0045] Statistics of main economic characters of cured tobacco leaves

[0046]

[0047] As can be seen from the above table, after adopting the warm cellar type of transplanting technology, the time from transplanting to the rosette stage of the tobacco seedlings is shortened by 5-7 days compared with the conventional transplanting, which reduces the seedling time of the tobacco seedlings in the field and promotes the early growth and development of the tobacco plants. The field growth of the tobacco plants in the rosette stage after the warm cellar type of transplanting is better, the number of effective leaves after the warm cellar type of transplanting basically reaches 12, the area of the largest leaf is large, the leaf color is green, and the field uniformity is obviously better than that of the conventional transplanting. At the same time, the economic characters of the cured tobacco leaves are counted. The warm cellar type of transplanting technology is beneficial to the improvement of the yield, output value and grade structure ratio of the tobacco leaves. Compared with the conventional transplanting technology, the warm cellar type of transplanting effectively ensures the soil temperature after the transplanting of the tobacco seedlings in the early stage, promotes the early growth and development of the tobacco plants to the rosette stage, and promotes the normal growth and development of the tobacco plants.

[0048] Reference Figures 1-5The utility model provides a set of topdressing device, including water box 1, fertilizer cylinder 2 and drilling head 6, one side of water box 1 is fixedly installed with control box 19, the top of water box 1 is connected with water feeding pipe 14, the bottom of water box 1 is connected with communication folding pipe 9, and the communication of communication folding pipe 9 and water box 1 is installed with electromagnetic valve no. 20, one side of water box 1 is fixedly installed with sliding slot frame 18, the bottom of fertilizer cylinder 2 is connected with discharge pipe 27, and discharge pipe 27 is installed with electromagnetic valve no. 28 at the communication of fertilizer cylinder 2, the outside of fertilizer cylinder 2 is fixedly installed with connecting block 12, the end of connecting block 12 away from fertilizer cylinder 2 is fixedly installed with sliding block 23, the inside of fertilizer cylinder 2 is rotatably installed with rotary rod 10, the outside of rotary rod 10 is fixedly installed with cross stirring rod 11, the outside of rotary rod 10 bottom is fixedly installed with rotary ring no. 21, the outside of rotary ring no. 21 is fixedly installed with magnet no. 22, the bottom of fertilizer cylinder 2 is fixedly installed with drive motor 3, the output of drive motor 3 is fixedly installed with driving gear 4, the bottom of fertilizer cylinder 2 is fixedly installed with cover cylinder 5, the bottom of cover cylinder 5 is connected with communication cylinder 7, the top of drilling head 6 is fixedly installed with driven gear ring 8, the end of sliding block 23 away from connecting block 12 is slidably installed in the inside of sliding slot frame 18, the end of communication folding pipe 9 away from water box 1 is connected with one side of communication cylinder 7, driven gear ring 8 is installed on the outside of communication cylinder 7 end away from cover cylinder 5 through bearing, the outside of driving gear 4 and the outside of driven gear ring 8 are engaged, the top of drilling head 6 inner chamber is fixedly installed with rotary ring no. 25, the inside of rotary ring no. 25 is fixedly installed with magnet no. 26, the outside of drilling head 6 is provided with discharge hole 17, cross stirring rod 11 is located in the inside of fertilizer cylinder 2, the outside of fertilizer cylinder 2 is provided with scale line, and fertilizer cylinder 2 is transparent, electromagnetic valve no. 28 and discharge pipe 27 are all located in the inside of cover cylinder 5, the end of magnet no. 22 away from rotary ring no. 21 and the end of magnet no. 26 away from rotary ring no. 25 are all inclined, and the magnetic pole of the end of magnet no. 22 away from rotary ring no. 21 and the end of magnet no. 26 away from rotary ring no. 25 is same.

[0049] Wherein, water can be added to the inside of the water box 1 through the water pipe 14, and the potassium nitrate seedling fertilizer particles are placed in the inside of the fertilizer cylinder 2, when the fertilizer is needed, the bottom end of the drilling head 6 is placed at the required position, then the driving motor 3 is started, the output end of the driving motor 3 can drive the driving gear 4 to rotate, thereby driving the driven gear ring 8 to rotate, thereby driving the drilling head 6 to rotate, drilling the required position, after drilling is completed, continue to place the drilling head 6 in the hole, then control the electromagnetic valve one 20 and the electromagnetic valve two 28 to open through the control box 19, add clean water and potassium nitrate seedling fertilizer particles into the inside of the drilling head 6 through the electromagnetic valve one 20 and the feeding pipe 27 to mix, according to the actual situation, the water mixing ratio and the fertilizer amount are easily set, the device automatically mixes and dissolves, the proportion of fertilizer and water can be accurately controlled, the concentration of the fertilizer meets the needs of different crops and growth stages, the rotating drilling head 6 can throw the fertilizer water into the inside of the fertilizer hole through the discharge hole 17, improve the application effect, in addition, the driven gear ring 8 can drive the magnet two 26 and the magnet two 26 to rotate when rotating, under the action of the repulsive force, the magnet one 22 and the rotating ring one 21 can rotate, thereby driving the rotating rod 10 to rotate, and the potassium nitrate seedling fertilizer particles in the inside of the fertilizer cylinder 2 are stirred through the cross stirring rod 11.

[0050] The inside of the communication cylinder 7 is fixedly installed with the stirring vertical rod 24, one end of the stirring vertical rod 24 away from the communication cylinder 7 extends to the inside of the drilling head 6, the stirring vertical rod 24 is located between the magnet two 26 and the magnet one 22, the two sides of the connecting block 12 are fixedly installed with the downward pressing bent rod 13, the two sides of the one end of the water box 1 away from the chute frame 18 are fixedly installed with the shoulder straps 16, the inside of the top of the water pipe 14 is clamped with the blocking plug 15, the stirring vertical rod 24 and the drilling head 6 are relatively moved when the drilling head 6 rotates, thereby stirring and mixing the clean water and the potassium nitrate seedling fertilizer particles in the inside of the drilling head 6, so that the fertilizer and water are fully mixed, and the uniformity of the solution is ensured.

[0051] Further, the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited, for example, it can be welding, or gluing, or integrally formed, etc. The skilled in the art is familiar with the conventional means.

[0052] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art, according to the technical solution and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A method for curing flue-cured tobacco seedlings by warm pit transplanting, characterized in that: The method comprises the following steps: S1: tobacco seedling selection: the selected tobacco seedlings are 45-50 days old, have a stem height of 3-5 cm, and have 4-6 true leaves, the selected tobacco seedlings are uniform in size, and are required to be healthy, free of pests and diseases, free of mechanical damage, have developed roots, and have no substrate scattering; S2: fertilization and ridging: 30 days before transplanting, the ridges are formed in time according to the soil conditions, first, a ditch is formed in the center of the ridge, the ditch is 18-20 cm wide and 15-20 cm deep, after the ditch is formed, all the base fertilizer is applied to the ditch at the bottom of the ridge, then the ridge is formed, the height of the ridge is 30-35 cm, the width of the ridge surface is 30-35 cm, the width of the ridge bottom is 80-90 cm, and the ridge body is in the shape of a trapezoid, is full and flat, and is free of pits, bumps and sundries; S3: pit forming and film covering: after the ridges are formed, the moisture content in the field is 60%-70%, and the pits are formed in the ridges before the film is covered, the pits are in the shape of a cylinder, the depth of the pits is 19-20 cm, and the diameter of the pits is 13-15 cm, after the pits are formed, the film is covered, the film is tightly attached to the ridges to completely seal the pits, and fine soil is used to compact the film edges around the ridges; S4: tobacco seedling transplanting: a small hole is punched in the film directly above the pit, the diameter of the hole is 6-8 cm, the size of the film opening is reduced under the premise of ensuring the transplanting operation, the film opening is ensured to be smaller than the pit opening, then the seedling is vertically planted into the pit from the film opening, a small amount of accompanying soil is brought in to cover the root of the seedling, and then a sufficient amount of rooting fertilizer water with a concentration of 0.5% is sprayed; S5: hole expanding and seedling emergence: the seedling grows in the pit under the film for 10-15 days, when the seedling is about to touch the film, the film hole is expanded in time to promote the seedling to grow out of the film and avoid seedling scalding caused by high temperature; S6: sealing and topdressing: when the seedling grows to 7-8 leaves and the growth point of the seedling exceeds the film opening by 2-3 cm, the pit is first filled with a small amount of accompanying soil, then the film opening is appropriately expanded, the opening is sealed with field soil, a virus prevention agent is sprayed before the opening is sealed, a matching topdressing device is used to topdress potassium nitrate seedling promoting fertilizer in the form of water mixing, a deep 10 cm topdressing hole is punched between the two seedlings in the ridge, the fertilizer solution is applied to the hole at a dosage of 0.5 kg per hole, and then the topdressing hole is sealed with soil; The application relates to a complete set of fertilizer supplementing device applied to the transplanting method, the complete set of fertilizer supplementing device comprising a water box (1), a fertilizer cylinder (2) and a drilling head (6), one side of the water box (1) being fixedly provided with a control box (19), the top of the water box (1) being communicated with a water adding pipe (14), the bottom of the water box (1) being communicated with a communication folding pipe (9), an electromagnetic valve (20) being arranged at the communication position of the communication folding pipe (9) and the water box (1), one side of the water box (1) being fixedly provided with a sliding groove frame (18), the bottom of the fertilizer cylinder (2) being communicated with a discharging pipe (27), an electromagnetic valve (28) being arranged at the communication position of the discharging pipe (27) and the fertilizer cylinder (2), the outer side of the fertilizer cylinder (2) being fixedly provided with a connecting block (12), the end, away from the fertilizer cylinder (2), of the connecting block (12) being fixedly provided with a sliding block (23), the inside of the fertilizer cylinder (2) being rotatably provided with a rotating rod (10), the outer side of the rotating rod (10) being fixedly provided with a cross-shaped stirring rod (11), the outer side of the bottom end of the rotating rod (10) being fixedly provided with a rotating ring (21), the outer side of the rotating ring (21) being fixedly provided with a magnet (22), the bottom of the fertilizer cylinder (2) being fixedly provided with a driving motor (3), the output end of the driving motor (3) being fixedly provided with a driving gear (4), the bottom of the fertilizer cylinder (2) being fixedly provided with a cover cylinder (5), the bottom of the cover cylinder (5) being communicated with a communication cylinder (7), the top of the drilling head (6) being fixedly provided with a driven gear ring (8), the top of the inner cavity of the drilling head (6) being fixedly provided with a rotating ring (25), the inner side of the rotating ring (25) being fixedly provided with a magnet (26), and the outer side of the drilling head (6) being provided with a discharging hole (17).

2. The method according to claim 1, wherein the method is a method for transplanting tobacco seedlings in a warm bed, characterized in that: In the S1 tobacco seedling selection step, the tobacco seedlings are required to be pruned at least once before being transplanted, and are required to be watered and fertilized for 3-5 days in advance.

3. The method according to claim 1, wherein the method is characterized by: In the S4 tobacco seedling transplanting step, the solute of the nutrient solution is potassium dihydrogen phosphate, and the application amount is controlled to be 0.25 kg / hole.

4. The method according to claim 1, wherein the method is a method for transplanting tobacco seedlings in a warm bed. In the S6 sealing and fertilizing step, the application amount of potassium nitrate in the potassium nitrate seedling fertilizer is 5 kg / mu, and the water solution is prepared according to a ratio of 1:

100.

5. The method according to claim 1, wherein the method is a method for transplanting tobacco seedlings in a warm bed. The end, away from the connecting block (12), of the sliding block (23) is slidingly arranged at the inner side of the sliding groove frame (18), the end, away from the water box (1), of the communication folding pipe (9) is communicated with one side of the communication cylinder (7), the outer side of the driving gear (4) is engaged with the outer side of the driven gear ring (8), and the driven gear ring (8) is arranged at the outer side of one end, away from the cover cylinder (5), of the communication cylinder (7) through a bearing.

6. The method according to claim 5, wherein the method is a method for transplanting tobacco seedlings in a warm bed, characterized in that: The cross-shaped stirring rod (11) is located inside the fertilizer cylinder (2), the outside of the fertilizer cylinder (2) is provided with a scale line, the fertilizer cylinder (2) is transparent, the electromagnetic valve two (28) and the discharging pipe (27) are located inside the cover cylinder (5), the end of the magnet one (22) away from the rotating ring one (21) and the end of the magnet two (26) away from the rotating ring two (25) are inclined, and the magnetic poles of the end of the magnet one (22) away from the rotating ring one (21) and the end of the magnet two (26) away from the rotating ring two (25) are the same.

7. The method according to claim 6, wherein the method is a method for transplanting tobacco seedlings in a warm bed. The stirring vertical rod (24) is fixedly installed inside the communication cylinder (7) and extends to the inside of the drilling head (6) away from the communication cylinder (7), and the stirring vertical rod (24) is located between the magnet two (26) and the magnet one (22).

8. The method according to claim 7, wherein the method is a method for transplanting tobacco seedlings in a warm bed. The two sides of the connecting block (12) are fixedly installed with the downward-bent rods (13), the two sides of the water box (1) away from the chute frame (18) are fixedly installed with the shoulder straps (16), and the inside of the top of the water adding pipe (14) is clamped with the blocking plug (15).

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