CN108811624B - Yam seeding apparatus that grows seedlings - Google Patents

Abstract

The invention provides a yam seedling and seeding device, which comprises a rack, wherein walking wheels are connected to the lower part of the rack through supporting rods, first gears are coaxially arranged on the walking wheels, the first gears are connected with second gears located below the rack through chains, third gears are coaxially arranged on the second gears, the third gears are connected with fourth gears located above the rack through transmission belts, seed supporting plates are uniformly distributed on the transmission belts, the transmission belts penetrate through a seed storage box arranged on the rack, a seeding box is arranged on the right side of the seed storage box, a buffer plate used for reducing falling speed of seeds is arranged in the seeding box, and a seed discharging pipeline is arranged at the bottom of the seeding box.

Description

Yam seeding apparatus that grows seedlings

Technical Field

The invention belongs to the technical field of agricultural machinery, and particularly relates to a yam seedling and sowing device.

Background

The rhizoma Dioscoreae is dry rhizome of Dioscorea opposita Thunb of Dioscoreaceae, has mild nature and sweet taste, and has effects of invigorating spleen and stomach, promoting fluid production, benefiting lung, invigorating kidney and arresting seminal emission. Can be used for treating spleen deficiency, anorexia, chronic diarrhea, lung deficiency, cough, asthma, spermatorrhea, leukorrhagia, frequent micturition, and diabetes due to deficiency heat. The quality of the yam produced in the ancient Huaiqing mansion (the district of Joker city in the south of the Yangxiang province, Qinyang county, Wu\ 38495 and the like along the Qin river band) is optimal, and the climate in the area is favorable for the accumulation of nutrients and the growth of plants, and is a Chinese yam production area in the way of the land in China. The rhizoma Dioscoreae rhizome mainly contains starch and polysaccharide (including mucus and glycoprotein), and pharmacological research shows that rhizoma Dioscoreae polysaccharide has effects of enhancing immunity, resisting aging, resisting oxidation, resisting tumor and treating diabetes.

The Chinese yam is an underground tuber product, the planting requirement is that the Chinese yam is planted at a certain depth underground, the planting mode in China mainly adopts manual shovel excavation or mechanical excavation ditching and manual discharging sowing, and the traditional planting mode is low in efficiency and wastes time and labor. The laggard sowing mode greatly restricts the large-scale production and development of the Chinese yam. The demand for the mechanization degree of yam planting is increasing, and the problem of effectively solving the mechanization degree of yam planting is urgent. The yam seeder is a high-efficiency operation machine for realizing sequential seeding of yams by utilizing mechanization, is pulled by a tractor, is hung at the back of the seeder, realizes automatic seeding from manual seeding to a machine, can greatly improve seeding efficiency, reduces labor cost, and can release a large amount of agricultural labor force. The development of the yam seeder has extremely important effects on adjusting and optimizing the agricultural industrial structure and accelerating the yield and income increasing pace of farmers.

Disclosure of Invention

The invention aims to provide a yam seedling and sowing device which is simple to operate, is matched with each other, saves time and labor, can ditch and drop seeds while dropping the seeds, can adjust the seed dropping density as required, can improve the later-stage potato bearing rate of yam seeds, and increases the yield.

The technical scheme adopted by the invention for realizing the purpose is as follows: a yam seedling and seeding device comprises a frame, wherein the lower part of the frame is connected with walking wheels through supporting rods, the walking wheels are coaxially provided with first gears, the first gears are connected with second gears positioned below the frame through chains, the second gears are coaxially provided with third gears, the third gears are connected with fourth gears positioned above the frame through transmission belts, seed trays are uniformly distributed on the transmission belts, the transmission belts pass through a seed storage box arranged on the frame, the right side of the seed storage box is provided with a seeding box, a buffer plate used for reducing the falling speed of seeds is arranged in the seeding box, the bottom of the seeding box is provided with a seed discharging pipeline, preferably, a power device such as a tractor and the like is used for driving the walking wheels to move forwards, the walking wheels rotate to drive first gears coaxially arranged with the walking wheels to rotate, the first gears drive the second gears to rotate through the chains, the second gears drive the third gears coaxially arranged, the third gear passes through the transmission band and drives the fourth gear rotation, the transmission band function simultaneously, the tray on the transmission band moves along with the transmission band, when the tray passes storage seed box bottom and gets into storage seed box inside, the tray holds up the chinese yam seed rebound in the storage seed box, the tray reachs the topmost through fourth gear department, the tray is downward, the chinese yam seed on the tray falls into the right side seeding incasement, be equipped with cross arrangement and the mellow and agreeable buffer board of shape in the seeding incasement, the chinese yam seed is sowed after slowly rolling into seeding bottom of the case portion along each rank buffer board, the buffer board can change directly to fall and slowly roll down, and slowed down the speed that rolls down greatly, avoid the chinese yam seed damage, keep chinese yam seed integrality, the survival rate of chinese yam seed has been improved.

Preferably, be equipped with the disseminator in the seeding case, the disseminator is connected with the seed metering pipeline, be equipped with the rotary disk in the disseminator, be equipped with the nest eye that is used for holding the seed on the rotary disk, the diameter of nest eye is greater than the diameter of seed, the diameter setting with the nest eye of preferred is less than the diameter size of two seeds, can guarantee that the seed number that falls into in the nest eye at every turn is one, the rotary disk is through built-in motor drive at the uniform velocity rotation, when the seed falls into the nest eye, the seed metering pipeline is scraped to the seed by the rotary disk, fall into the hole via the seed metering pipeline again, this sets up the size that the accessible changed the nest eye, decide the quantity of seeding at every turn, and the density that the seeding was controlled to the uniform.

Preferably, the seed metering pipeline slope sets up backward, seed metering pipeline bottom front side is equipped with the ware of opening soil, the ware of opening soil that seed metering pipeline bottom set up can satisfy limit ditching limit seeding, provide a good living environment for the seed, because the slot unevenness who opens, set up seed metering pipeline slope backward, the device is advancing the in-process, the whereabouts in the seed metering pipeline is changeed to the chinese yam seed, improve seeding efficiency, can avoid seed metering pipe road junction to scrape simultaneously and rub earth and lead to the pipeline mouth to block up, cause the damage of seeding difficulty and device.

Preferably, the tray includes the semicircular chassis, be connected with the string bag that a plurality of nets are constituteed through the connecting rod in the chassis, the string bag is the stretch cord that flexibility is good preferably, the chinese yam seed falls into the string bag on the tray, the string bag is the net and constitutes, and the string bag has certain elasticity, avoid chinese yam seed direct and chassis direct contact, and it has many root hairs to grow on the chinese yam seed, the root hair that this design can make partial chinese yam seed passes the net, avoid the root hair to be sticis, the root hair of chinese yam seed and the area of contact of tray have been reduced, the damage rate of chinese yam seed has been greatly reduced in this design, the integrality of chinese yam seed has been kept, the survival rate has been increased.

Preferably, arc-shaped strips are arranged in the grid, cotton slivers are arranged in the arc-shaped strips, swingable turnover pieces are arranged on the cotton slivers, the arc-shaped strips are preferably arranged into four strips, and the relative arc openings are arranged outwards, so that the effect of firmer structure can be achieved, the grid can be effectively opened, the grid is prevented from being deformed by the pressure of the Chinese yam seeds, the grid is kept in an opened state all the time, the root hairs of the Chinese yam seeds penetrate through the grid to a greater extent, the root hairs are prevented from being compressed, the contact area between the root hairs of the Chinese yam seeds and a seed supporting disc is reduced, the damage rate of the Chinese yam seeds is greatly reduced, the integrity of the Chinese yam seeds is maintained, the survival rate is increased, the cotton slivers are arranged in the arc-shaped strips, the swingable turnover pieces are arranged on the cotton slivers, the cotton slivers can be wetted by clear water during sowing, the piece that turns over on the silver can be born the force and swing by oneself, and when the chinese yam seed fell into the string bag, the piece that turns over carried out inhomogeneous effort to the chinese yam seed, produces similar biostimulation's effect to the chinese yam seed, and the increase of the endogenous cell kinins of amazing chinese yam seed and auxin arouses the change of cytoplasmic membrane permeability, promotes vegetable protein's synthesis and the growth of cell to promote chinese yam seed respiration, can improve chinese yam seed later stage potato production rate greatly, increase of production.

Preferably, storage seed case bottom is equipped with the shell fragment that is used for holding in the palm the kind of dish to pass through, and the preferred initial condition of shell fragment upwards sets up for slightly, should set up and can avoid the seed to drop from storage seed case, and the shell fragment need just can swing through certain external force, and when holding in the palm the kind of dish and reacing storage seed case bottom, the dish that holds in the palm promotes the shell fragment perk that makes progress to it is inside to hold in the palm the kind of dish.

Preferably, the seed storage box top is equipped with the baffle that is used for holding in the palm the kind of a dish to pass through, and the baffle just can swing through certain external force, and when holding in the palm the kind of a dish and reacing the seed storage box top, the upward perk of the dish promotion baffle of holding in the palm to inside the kind of a dish of holding in the palm rolls out the seed storage box smoothly, the setting up of baffle has more played the effect of the lid that opens and shuts, can stir the baffle when needing to sow, put into the seed storage box with the chinese yam seed from the baffle department, and can block inside.

Preferably, the frame afterbody is equipped with the earthing device, the earthing device is including locating the earthing wheel on the branch pole, divide the pole to link to each other with the motor in the frame through the pivot that has the spring, earthing wheel sets to two back of the body mutually, rotate through motor drive, stir the ditch inslot with the earth of slot both sides with rotatory mode, make earth cover in chinese yam seed surface, protect the chinese yam seed, avoid the chinese yam seed to expose, increase chinese yam seed survival rate, be equipped with the spring in the pivot, can adapt to the different ground of height, when meetting barriers such as obstinate stone, the earthing wheel upwards lifts up, do not receive the collision damage with the protection earthing wheel, increase device life.

Compared with the prior art, the invention has the beneficial effects that: 1) four groups of gears are arranged to be matched with each other to transport the Chinese yam seeds, so that the structure is simple, and time and labor are saved; 2) the buffer plates which are arranged in a crossed manner and have round shapes are arranged in the sowing box, so that the direct falling can be changed into slow falling, the falling speed is greatly reduced, the damage of the Chinese yam seeds is avoided, the integrity of the Chinese yam seeds is kept, and the survival rate of the Chinese yam seeds is improved; 3) the cotton sliver after water absorption can nourish the root hairs of the yam seeds, the survival rate of the yam seeds is further improved, the turning piece on the cotton sliver can promote the respiration of the yam seeds, the later-stage potato bearing rate of the yam seeds is greatly improved, and the yield is increased; 4) be equipped with two earthing wheels that can upwards lift up and carry on the back mutually to the ditch inslot is dialled to the earth of ditch groove both sides to rotatory mode, makes earth cover in chinese yam seed surface, protects the chinese yam seed, avoids the chinese yam seed to expose.

The yam seedling and sowing device provided by the invention overcomes the defects of the prior art, and is reasonable in design and convenient to operate.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the seeder of the present invention;

FIG. 3 is a schematic view of a seed tray of the present invention;

FIG. 4 is a top view of the tray of the present invention;

FIG. 5 is a top view of a grid of the present invention;

fig. 6 is a right side view of the grid of the present invention.

Description of reference numerals: 1. a frame; 2. a support bar; 3. a traveling wheel; 4. a seeding box; 5. a buffer plate; 6. a seeder; 601. rotating the disc; 602. making cells; 7. a seed discharge duct; 8. a soil opener; 9. a seed storage box; 10. a spring plate; 11. a baffle plate; 12. a first gear; 13. a chain; 14. a second gear; 15. a third gear; 16. a fourth gear; 17. a conveyor belt; 18. carrying out seed supporting; 181. a chassis; 182. a connecting rod; 183. a net bag; 184. a grid; 185. an arc-shaped strip; 186. a cotton sliver; 187. turning the sheet; 19. a motor; 20. a rotating shaft; 21. a spring; 22. separating rods; 23. and (4) a soil covering wheel.

Detailed Description

The invention is described in further detail below with reference to examples and figures:

example 1:

as shown in figure 1, a yam seedling and seeding device comprises a frame 1, wherein a walking wheel 3 is connected below the frame 1 through a support rod 2, a first gear 12 is coaxially arranged on the walking wheel 3, the first gear 12 is connected with a second gear 14 positioned below the frame 1 through a chain 13, a third gear 15 is coaxially arranged on the second gear 14, the third gear 15 is connected with a fourth gear 16 positioned above the frame 1 through a transmission belt 17, seed trays 18 are uniformly distributed on the transmission belt 17, the transmission belt 17 passes through a seed storage box 9 arranged on the frame 1, a seeding box 4 is arranged on the right side of the seed storage box 9, a buffer plate 5 for reducing the falling speed of seeds is arranged in the seeding box 4, a seeding pipeline 7 is arranged at the bottom of the seeding box 4, a power device such as a tractor and the like is preferably used for driving the walking wheel 3 to move forward, the walking wheel 3 rotates to drive the first gear 12 coaxially arranged with the walking wheel to rotate, the first gear 12 drives the, the second gear 14 rotates to drive a third gear 15 which is coaxially arranged with the second gear to rotate, the third gear 15 drives a fourth gear 16 to rotate through a transmission belt 17, meanwhile, the transmission belt 17 operates, a seed tray 18 on the transmission belt 17 moves along with the transmission belt 17, when the seed tray 18 passes through the bottom of the seed storage box 9 and enters the inside of the seed storage box 9, the seed tray 18 holds the Chinese yam seeds in the seed storage box 9 to move upwards, after the seed tray 18 reaches the topmost end and passes through the fourth gear 16, the seed tray 18 moves downwards, the Chinese yam seeds on the seed tray 18 fall into a right-side sowing box 4, buffering plates 5 which are arranged in a crossed mode and have round shapes are arranged in the sowing box 4, the Chinese yam seeds slowly roll into the bottom of the sowing box 4 along each step of the buffering plates 5 to be sowed, the buffering plates 5 can directly fall into slow rolling, the rolling speed is greatly reduced, the damage of the Chinese yam seeds is avoided, the survival rate of the yam seeds is improved.

Example 2:

as shown in fig. 1-2, the optimization scheme of this embodiment based on embodiment 1 is as follows: a seeder 6 is arranged in the seeding box 4, the seeder 6 is connected with a seed discharging pipeline 7, a rotary disc 601 is arranged in the seeder 6, a pocket 602 for accommodating seeds is arranged on the rotary disc 601, the diameter of the pocket 602 is larger than that of the seeds, the diameter of the pocket 602 is preferably set to be smaller than that of two seeds, the number of the seeds falling into the pocket 602 at each time can be ensured to be one, the rotary disc 601 is driven by a built-in motor to rotate at a constant speed, when the seeds fall into the pocket 602, the seeds are scraped to the seed discharging pipeline 7 by the rotary disc 601 and then fall into a pit hole through the seed discharging pipeline 7, the setting can determine the number of the seeds at each time by changing the size of the pocket 602, the seeding density can be controlled by the uniform or variable-speed rotation of the rotary disc 601, various seeding requirements are met, the seed discharging pipeline 7 is obliquely arranged backwards, a soil opener 8 is arranged at the front side of the bottom, soil opener 8 that seed metering pipeline 7 bottom set up can satisfy limit ditching limit seeding, provides a good living environment for the seed, because the slot unevenness that opens, sets up seed metering pipeline 7 slope backward, and the device is at the in-process of marcing, and the whereabouts in seed metering pipeline 7 is changeed to the chinese yam seed, improves seeding efficiency, can avoid 7 mouths of seed metering pipeline to scratch earth simultaneously and lead to the pipeline mouth to block up, causes the damage of seeding difficulty and device.

Example 3:

as shown in fig. 3 to 6, the optimization scheme of this embodiment based on embodiment 1 is as follows: the seed supporting disc 18 comprises a semicircular chassis 181, a net bag 183 consisting of a plurality of grids 184 is connected in the chassis 181 through a connecting rod 182, the net bag 183 is preferably an elastic rope with good flexibility, Chinese yam seeds fall into the net bag 183 on the seed supporting disc 18, the net bag 183 consists of the grids 184, and the net bag 183 has certain elasticity, so that the Chinese yam seeds are prevented from directly contacting with the chassis 181, and a plurality of root hairs grow on the Chinese yam seeds, the design can enable part of the root hairs of the Chinese yam seeds to pass through the grids 184, the root hairs are prevented from being compressed, the contact area between the root hairs of the Chinese yam seeds and the seed supporting disc 18 is reduced, the damage rate of the Chinese yam seeds is greatly reduced, the integrity of the Chinese yam seeds is kept, the survival rate is increased, arc-shaped strips 185 are arranged in the grids 184, cotton slivers 186 are arranged in the arc-shaped strips 185, swingable turning pieces 187 are arranged on the cotton slivers 186, the arrangement can play a firmer role, can effectively strut the grids 184, avoid the grids 184 from being deformed by the pressure of the yam seeds, keep the grids 184 in a stretched state all the time, ensure that the root hairs of the yam seeds penetrate the grids 184 to a greater extent, avoid the root hairs from being compressed, reduce the contact area between the root hairs of the yam seeds and the seed supporting disc 18, greatly reduce the damage rate of the yam seeds, keep the integrity of the yam seeds and increase the survival rate, the arc-shaped strip 185 is internally provided with the cotton strip 186, the cotton strip 186 is provided with the swingable turnover pieces 187, the cotton strip 186 can be wetted by clear water during sowing, the cotton strip 186 after absorbing water is contacted with the yam seeds, can further improve the survival rate of the yam seeds, the turnover pieces 187 on the cotton strip 186 can swing under the action of force by self, when the yam seeds fall into the net 183, the turnover pieces 187 carry out uneven acting force on the yam seeds, the biological stimulation effect on the yam seeds is generated, the increase of endogenous cell stimulating peptides and auxin of the yam seeds is stimulated, the permeability of cytoplasmic membranes is changed, the synthesis of plant protein and the growth of cells are promoted, the respiration of the yam seeds is promoted, the late-stage potato bearing rate of the yam seeds can be greatly improved, and the yield is increased.

In the invention, the arc-shaped strip 185 is made of super soft thermoplastic elastomer and is composed of the following materials in parts by weight: 25 parts of ethylene propylene diene monomer; 9 parts of homopolymerized polypropylene; 1.6 parts of 3, 3' -thiopropionic laurate; 0.01 part of 3- (bromoethyl) heptane; 11 parts of nano calcium carbonate; 29 parts of rubber oil; 2.5 parts of 2, 5-bis (tert-butylperoxy) -2, 5-dimethyl-3-hexyne; 0.1 part of diphenylmethane bismaleimide; the ethylene propylene diene monomer is prepared by three monomers through copolymerization reaction, wherein the first monomer is ethylene, and the weight content of the ethylene propylene diene monomer is 85% of the total weight of the three monomers; the second monomer is propylene, and the weight content of the second monomer is 45 percent of the total weight of the three monomers; the third monomer is ethylidene norbornene or ethylene norbornene, and the weight content of the third monomer is 11 percent of the total weight of the three monomers; the Mooney viscosity of the ethylene propylene diene monomer is 10, and the preparation method comprises the following steps: preparing the raw materials according to the parts by weight, and processing by adopting a double-screw extruder, wherein the parameters of the double-screw extruder are as follows: the length-diameter ratio is 59, the rotating speed is 190 r/min, the temperature is 210 ℃, the thermoplastic material prepared by dynamic vulcanization can obviously improve the elasticity and the flexibility of the arc-shaped strip 185, 3- (bromoethyl) heptane is added, so that rubber particles can be crosslinked and continuously sheared and crushed into tiny particles in the vulcanization process, the interfacial tension is reduced, the requirement of the body fluidity is met, the elastic recovery capability is improved, and the prepared arc-shaped strip 185 is softer and more elastic.

Example 4:

as shown in fig. 1, the optimization scheme of this embodiment based on embodiment 1 is as follows: the bottom of the seed storage box 9 is provided with an elastic sheet 10 for the seed supporting plate 18 to pass through, the elastic sheet 10 is preferably arranged slightly upwards in an initial state, the arrangement can prevent the seeds from falling from the seed storage box 9, the elastic sheet 10 can swing only by a certain external force, when the seed supporting plate 18 reaches the bottom of the seed storage box 9, the seed supporting plate 18 pushes the elastic sheet 10 to tilt upwards, so that the seed supporting plate 18 smoothly enters the inside of the seed storage box 9, the top of the seed storage box 9 is provided with a baffle plate 11 for the seed supporting plate 18 to pass through, the baffle plate 11 can swing only by a certain external force, when the seed supporting plate 18 reaches the top of the seed storage box 9, the seed supporting plate 18 pushes the baffle plate 11 to tilt upwards, so that the seed supporting plate 18 smoothly rotates out of the inside of the seed storage box 9, the baffle plate 11 is arranged to play a role of opening and closing a cover, the baffle plate 11 can be pulled when seeding is, 1 afterbody of frame is equipped with the earthing device, the earthing device is including locating earthing wheel 23 on the branch pole 22, divide pole 22 to link to each other with motor 19 in the frame 1 through the pivot 20 that has spring 21, earthing wheel 23 sets to two that carry on the back mutually, rotate through the drive of motor 19, stir the ditch inslot with the earth of slot both sides with rotatory mode, make earth cover in chinese yam seed surface, the protection chinese yam seed, avoid the chinese yam seed to expose, increase chinese yam seed survival rate, be equipped with the spring on the pivot 20, can adapt to the different ground of height, when meetting obstacles such as obstinate, earthing wheel 23 upwards lifts up, do not receive the collision damage with protection earthing wheel 23, increase device life.

Example 5:

the practical use process of the invention is as follows: when sowing is needed, the baffle plate 11 is pulled, Chinese yam seeds are placed into the seed storage box 9 from the baffle plate 11, a power device such as a tractor drives the traveling wheels 3 to move forwards, the traveling wheels 3 rotate to drive the first gear 12 coaxially arranged with the traveling wheels to rotate, the first gear 12 drives the second gear 14 to rotate through the chain 13, the second gear 14 rotates to drive the third gear 15 coaxially arranged with the traveling wheels to rotate, the third gear 15 drives the fourth gear 16 to rotate through the transmission belt 17, meanwhile, the transmission belt 17 operates, the seed tray 18 on the transmission belt 17 moves along with the transmission belt 17, when the seed tray 18 passes through the bottom of the seed storage box 9 and enters the inside of the seed storage box 9, the seed tray 18 lifts up the Chinese yam seeds in the seed storage box 9 to move upwards, after the top end of the seed tray 18 passes through the fourth gear 16, the seed tray 18 moves downwards, the Chinese yam seeds on the seed tray 18 fall into the right sowing box 4, and slowly roll into the sowing device 6 at the bottom of the seed storage, the rotary disc 601 rotates at a constant speed through built-in motor drive, when the seed falls into the nest hole 602, the seed is scraped to the seed metering pipeline 7 by the rotary disc 601, again fall into the hole via the seed metering pipeline 7, the soil opener 8 that seed metering pipeline 7 bottom set up can satisfy limit ditching limit seeding, provide a good living environment for the seed, drive earthing wheel 23 through motor 19 and rotate, dial the earth of slot both sides in the slot, make earth cover in the yam seed surface, protect the yam seed, avoid the yam seed to expose.

Conventional techniques in the above-described embodiments are known to those skilled in the art and will not be described in detail herein.

It should be understood that the above examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the description of the invention, and equivalents fall within the scope of the invention as defined by the appended claims.

Claims (4)

1. The utility model provides a chinese yam seeder that grows seedlings, which comprises a frame (1), frame (1) below is connected with walking wheel (3) through bracing piece (2), the coaxial first gear (12) that is provided with on walking wheel (3), first gear (12) link to each other with second gear (14) that are located frame (1) below through chain (13), second gear (14) are coaxial to be provided with third gear (15), third gear (15) link to each other with fourth gear (16) that are located frame (1) top through transmission band (17), the equipartition has tray dish (18) on transmission band (17), transmission band (17) pass and locate seed storage box (9) on frame (1), its characterized in that: a seeding box (4) is arranged on the right side of the seed storage box (9), a buffer plate (5) used for slowing down the falling speed of seeds is arranged in the seeding box (4), and a seed discharging pipeline (7) is arranged at the bottom of the seeding box (4); a seeder (6) is arranged in the seeding box (4), the seeder (6) is connected with the seed discharging pipeline (7), a rotating disc (601) is arranged in the seeder (6), and a cell (602) for accommodating seeds is arranged on the rotating disc (601); the seed sowing pipeline (7) is arranged backwards in an inclined way, and a soil opener (8) is arranged on the front side of the bottom of the seed sowing pipeline (7); the seed supporting disc (18) comprises a semicircular chassis (181), and a net bag (183) consisting of a plurality of grids (184) is connected in the chassis (181) through a connecting rod (182); an arc-shaped strip (185) is arranged in the grid (184), a cotton sliver (186) is arranged in the arc-shaped strip (185), and a swinging turning piece (187) is arranged on the cotton sliver (186).

2. The yam seedling raising and sowing device as claimed in claim 1, wherein: the bottom of the seed storage box (9) is provided with a spring plate (10) for the passing of the seed tray (18).

3. The yam seedling raising and sowing device as claimed in claim 1, wherein: the top of the seed storage box (9) is provided with a baffle (11) for the seed tray (18) to pass through.

4. The yam seedling raising and sowing device as claimed in claim 1, wherein: the soil covering device is arranged at the tail of the rack (1), the soil covering device comprises soil covering wheels (23) arranged on branch rods (22), and the branch rods (22) are connected with a motor (19) on the rack (1) through rotating shafts (20) with springs (21).