Sowing and sand covering integrated equipment and method for alfalfa saline-alkali soil

Abstract

The invention discloses sowing and sand covering integrated equipment and method for alfalfa saline-alkali soil, relates to the technical field of sowing and sand covering, and completes sowing and sand covering of alfalfa through the synergistic effect of a rack, a seed bin, a sowing wheel, a sowing assembly, a driving assembly and a sand covering assembly. The seeder has the beneficial effects that the seeding assembly and the sand covering assembly are simultaneously driven by the driving assembly, so that the rack can drive the sand covering assembly to cover sand while driving the seeding assembly to sow in the process of moving along with the seeding wheel, and a driving source is reduced; the rotary tillage mechanism is used for ditching, the adjusting mechanism is used for sowing, sand covering is completed through the sand falling roller, the two working procedures of sowing and sand covering can be completed through one-time movement of the equipment, and the production cost is saved; and gullies with different depths are formed through the rotary tillage mechanism, so that the seeding pipe can be put into the gullies for seeding, and the seeding density of the alfalfa seeds is adjusted through the adjusting mechanism, so that the equipment can be used for seeding the optimal quantity of alfalfa seeds on the saline-alkali soil.

Description

Technical Field

[0001] The invention relates to the technical field of sowing and sand covering, and in particular to an integrated device and method for sowing and sand covering in alfalfa saline-alkali land. Background Art

[0002] Saline-alkali land is a type of salt accumulation, which means that the salt contained in the soil affects the normal growth of crops. Plants can hardly survive in areas with severe saline-alkali soil. Alfalfa is a perennial herbaceous plant of the Leguminosae family and the genus Alfalfa. Its seeds are oval, smooth, and yellow or brown. Alfalfa has a wide adaptability and can grow in various terrains and soils, but the most suitable conditions are soft sandy soil and can be planted on slightly saline-alkali land.

[0003] For example, the patent with the authorization announcement number CN221429530U and the authorization announcement date July 30, 2024, and the name of which is "A saline-alkali land oil sunflower protected sowing and alfalfa planting technology and planting device", includes a connecting frame, a mounting platform, an adjusting rod, a furrow opener, a seed barrel, a sowing head, a flow control component and a soil covering component. The front of the connecting frame is connected to the mounting platform, and a plurality of adjusting rods are connected to the lower side of the mounting platform. The telescopic ends of the adjusting rods are connected to furrow openers, and a plurality of seed barrels are connected to the upper side of the mounting platform. The lower part of the seed barrels is connected to the sowing head through the mounting platform, and the mounting platform is connected to a flow control component, and the lower side of the mounting platform is connected to a soil covering component. The land is furrowed by the furrow opener, and the oil sunflower seeds and alfalfa seeds in the seed barrel enter the planting furrow through the sowing head. The height of the furrow opener can be adjusted by the adjusting rod, thereby adjusting the depth of the furrow opened by the furrow opener.

[0004] Although there is a structure in the prior art in which an adjustment rod is provided to adjust the furrowing depth of the furrow opener as described above so as to sow alfalfa seeds to different depths, during the sowing process, an air pump needs to be used to transport gas to the sowing head through a connecting pipe to perform hole sowing of sunflowers and row sowing of alfalfa, and an additional driving source is used to provide a sowing power source, which increases the sowing process and increases the sowing cost. Summary of the invention

[0005] The purpose of the present invention is to provide an integrated device and method for sowing and covering alfalfa in saline-alkali land, so as to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: An alfalfa seeding and sand covering integrated device for saline-alkali land, comprising a frame. A seed bin is arranged at the upper end of the frame. A seeding wheel is rotatably arranged on each side of the frame. A seeding assembly is arranged at the lower end of the seed bin. A driving assembly is arranged between the seeding wheel and the seeding assembly. A sand covering assembly is arranged on the frame, and the sand covering assembly is arranged on the side of the seeding assembly. The driving assembly is used to drive the seeding assembly to sow and drive the sand covering assembly to cover sand; The seeding assembly includes a plurality of seeding pipes. The plurality of seeding pipes are evenly arranged along the length direction of the seed bin. The upper end of the seeding pipe is communicated with the seed bin. A plurality of rotary tillage mechanisms are arranged on the frame. The number of the rotary tillage mechanisms is the same as the number of the seeding pipes. The rotary tillage mechanism can create gullies with different depths on the saline-alkali land so that the seeding pipes can be inserted with alfalfa seeds. The lower end of the seeding pipe is arranged below the rotary tillage mechanism. An adjusting mechanism is arranged between the upper end of the seeding pipe and the seed bin. The adjusting mechanism is used to adjust the number of alfalfa seeds dropped from the seed bin; The sand covering assembly includes a sand bin. The sand bin is arranged on the frame. A plurality of sand dropping pipes are evenly arranged at the lower end of the sand bin. The number of the sand dropping pipes is the same as the number of the seeding pipes, and the sand dropping pipes are evenly arranged along the length direction of the sand bin. A sand dropping roller is arranged between the sand bin and the sand dropping pipes. A plurality of sand dropping grooves are arranged at the intersection of the sand dropping roller and each sand dropping pipe, and the sand dropping grooves are evenly arranged along the circumferential direction of the sand dropping roller. The sand dropping roller is used to control the sand volume. A plurality of swing rods are rotatably arranged on the frame. A pressing roller unit is rotatably arranged at one end of the swing rod away from the frame. The lower ends of the seeding pipe, the sand dropping pipe and the pressing roller unit are on the same straight line.

[0007] As described above, the seeding wheel includes a rubber wheel. The rubber wheel is rotatably arranged on the frame. An iron ring is further arranged on the outer side of the rubber wheel, and a plurality of iron sheets are evenly arranged on the outer side of the iron ring.

[0008] As described above, the driving assembly includes a driving synchronous wheel. The driving synchronous wheel is connected with the seeding wheel. A seeding synchronous wheel is arranged at the side end of the adjusting mechanism. The seeding synchronous wheel and the driving synchronous wheel are connected by a first synchronous belt. A sand dropping synchronous wheel is arranged at one end of the sand dropping roller. The driving synchronous wheel and the sand dropping synchronous wheel are connected by a second synchronous belt.

[0009] As described above, a partition frame is arranged in the seed bin. The partition frame includes a plurality of partition spaces, and the partition spaces are used to separate the seed bin.

[0010] As described above, the rotary tillage mechanism includes adjusting rods, which are all arranged on the frame in a sliding manner. A plug rod is arranged on the frame in a sliding manner. A locking spring is arranged between the plug rod and the frame. A plurality of adjusting holes are uniformly arranged on the adjusting rods along the length direction, and one end of the plug rod is inserted into the adjusting hole.

[0011] As described above, the rotary tillage mechanism further includes a rotary tillage plate, which includes a fixed section and a sliding section. Both the fixed section and the sliding section are arc-shaped plates. The fixed section is arranged in the middle of the adjusting rod. The sliding section is arranged under the adjusting rod through a telescopic rod. A pointed end is arranged at the lower end of the sliding section. A connecting part is arranged at the upper end of the sliding section. The sliding section is arranged under the fixed section in a sliding manner through the connecting part, and the sliding section is connected to the extending end of the telescopic rod. The lower end of the sliding section is lower than the lower end of the adjusting rod.

[0012] As described above, a through hole is arranged in the middle of the lower side of the sliding section. A sliding rod is arranged at the lower end of the adjusting rod in a rotating manner. A drill bit is arranged on the outer side of the sliding rod in a sliding manner. One end of the drill bit away from the adjusting rod is arranged in the through hole. Two spiral grooves are arranged on the outer side of the sliding rod. Two spiral blocks are correspondingly arranged in the drill bit. The spiral blocks are arranged in the spiral blocks in a sliding manner. A return spring is arranged in the drill bit.

[0013] As described above, the adjusting mechanism includes a square shaft. A plurality of adjusting blocks are uniformly arranged on the outer side of the square shaft in a sliding manner along its length direction. Each adjusting block is arranged at the upper end of each seeding pipe. A plurality of seeding grooves are uniformly arranged on the outer side of the adjusting block along its circumferential direction. The adjusting block is arranged at the lower end of the seed bin in a sliding manner. Adjacent adjusting blocks are connected by a connecting sleeve. One end of the seed bin is arranged in a threaded fit with an adjusting sleeve. The adjusting sleeve is rotatably connected to the adjusting block at the end of the square shaft.

[0014] As described above, the press roller unit includes a roller column, which is arranged at the end of the swing rod away from the frame in a rotating manner. Two gathering plates are sleeved on the outer side of the roller column. The gathering plates are arranged on the swing rod. The two gathering plates are in a flared shape, and the openings of the two gathering plates gradually narrow in the direction away from the frame.

[0015] A method for sowing and covering sand in alfalfa saline-alkali land, which is applicable to the above-mentioned alfalfa saline-alkali land sowing and covering sand integrated equipment, includes the following steps: Step 1: Mount the seeding and sand-covering integrated equipment on other farming equipment such as tractors through the frame. After the seeding and sand-covering integrated equipment is installed, add the alfalfa seeds mixed with fine sand in proportion to the seed bin to increase the fluidity of the seeds with the help of sand grains and ensure uniform distribution during sowing. Add sand or fine soil mixed with sandy soil to the sand bin. After the seed bin and the sand bin are filled with the corresponding alfalfa seeds and sandy soil respectively, the seeding and sand-covering integrated equipment can be driven by equipment such as tractors to move for sowing. And by rotating the adjusting sleeve, the adjusting sleeve moves along the square shaft through the thread fit with the seed bin, so that the adjusting sleeve adjusts the position of the adjusting block through the connecting sleeve, and the adjusting block adjusts the quantity of alfalfa seeds falling from the seed bin. In addition, pull the inserting rod outwards, so that the inserting rod squeezes the locking spring and disengages from the adjusting hole on the adjusting rod, so that the inserting rod releases the locking and fixing of the adjusting rod, in order to adjust the position of the adjusting rod on the frame, and thus adjust the depth of breaking and trenching of the rotary tillage plate on the saline-alkali land; The second step is that a tractor or other equipment drives the integrated sowing and sand covering equipment to move. During the sowing process, the sliding section of the rotary tillage plate is used to break and ditch the saline-alkali land. When the tip of the sliding section breaks and ditches, the sliding section is driven to slide on the adjusting rod by the telescopic rod, so as to avoid damage to the tip of the lower end of the sliding section. When the sliding section moves and retracts toward the adjusting rod, the sliding rod is driven to move by the adjusting rod, so that the sliding rod squeezes the reset spring, so that the drill bit rotates on the outside of the sliding rod under the action of the spiral groove and the spiral block, so that the drill bit rotates and passes through the through hole in the middle of the lower side of the sliding section, so that the drill The drill head is used to break and dig trenches at the hard position of the saline-alkali land. After the sliding section passes through the hard position of the saline-alkali land, the telescopic rod drives the sliding section to reset, and the reset spring drives the drill bit to reset. When the sliding section moves with the telescopic rod, the connection with the fixed section is maintained through the connecting part, so that the soil dug out by the sliding section when breaking and digging trenches is discharged to the side through the fixed section. When the tractor and other equipment drive the integrated sowing and sand covering equipment to move and sow, the sowing wheel rotates with the integrated sowing and sand covering equipment, so that the rubber wheel drives the iron ring to rotate, so that the iron ring rotates with the rubber wheel, so that the iron ring drives the patch to rotate and insert into the land , ensuring that the seeding wheel rotates accurately, avoiding the situation where the seeding wheel only moves with the tractor and other equipment without rotating; when the seeding wheel rotates, it drives the driving synchronous wheel to rotate synchronously, so that the driving synchronous wheel drives the square shaft to rotate through the first synchronous belt through the seeding synchronous wheel, so that the square shaft drives the adjusting block to rotate, so that the alfalfa seeds fall into the seeding tube as the adjusting block rotates, so that the seeding tube puts the alfalfa seeds that fall into it into the gully broken by the sliding section. During the alfalfa seed sowing process, the driving synchronous wheel is driven to rotate by the seeding wheel, so that the driving synchronous wheel drives the sand falling roller to rotate through the second synchronous belt and the sand falling synchronous wheel, so that The sand in the sand bin falls into the sand falling groove outside the sand falling roller, so that the sand falling roller can transport the sand into the sand falling pipe when rotating, so that the sand falling pipe covers the sand in the sand bin on the alfalfa seeds sown by the sowing pipe, so that the sand covers and fills the alfalfa seeds sown in the gullies broken by the sliding section. After the sand covers the alfalfa seeds, the frame drives the swing rod to move synchronously, so that the swing rod drives the roller column to rotate on the ground, so that the roller column flattens the sand falling from the sand falling pipe, and at the same time, the edges of the covering sand are gathered by two gathering plates sleeved on the outside of the roller column; Step 3: After the alfalfa seeds are sown and covered with sand, the sowing and sand-covering integrated equipment is driven away from the sowing area by tractors and other equipment, and the sowing and sand-covering integrated equipment is cleaned. After the cleaning is completed, the sowing and sand-covering integrated equipment is removed from tractors and other equipment.

[0016] In the above technical solution, the beneficial effects of the present invention are: 1. The present invention drives the seeding component and the sand covering component simultaneously through the provided driving component, so that during the movement of the frame along with the seeding wheel, the sand covering component can be driven to cover sand while the seeding component is driven to sow seeds. Both components are driven by the driving component, reducing the driving source and lowering the cost. 2. The present invention breaks and trenches the saline-alkali land through the provided rotary tillage mechanism, so that alfalfa seeds are conveyed into the seeding pipe through the adjusting mechanism, facilitating the seeding of alfalfa seeds by the seeding pipe. After the alfalfa seeds are sown, the sand in the sand bin is conveyed into the sand dropping pipe through the sand dropping roller, so as to cover the sown alfalfa seeds with sand. The equipment can complete two processes of seeding and sand covering by moving once, saving the production cost. 3. The present invention can create trenches with different depths on the saline-alkali land through the provided rotary tillage mechanism for the seeding pipe to put alfalfa seeds, and adjusts the seeding density of alfalfa seeds through the adjusting mechanism, enabling the equipment to adjust the seeding density in real time according to the actual situation of the saline-alkali land, ensuring that the equipment can sow the most suitable number of alfalfa seeds on the saline-alkali land. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0018] Figure 1 Schematic three-dimensional structure diagram of the seeding and sand covering integrated equipment provided by the embodiment of the present invention; Figure 2 Schematic first planar structure diagram of the seeding and sand covering integrated equipment provided by another embodiment of the present invention; Figure 3 Schematic second planar structure diagram of the seeding and sand covering integrated equipment provided by another embodiment of the present invention; Figure 4 Provided by another embodiment of the present invention Figure 2 A - A cross-sectional view; Figure 5 Schematic three-dimensional structure diagram between the adjusting rod, adjusting hole, rotary tillage plate, through hole, telescopic rod, pointed end part and connecting part provided by another embodiment of the present invention; Figure 6 Provided by another embodiment of the present invention Figure 4 Enlarged schematic diagram of the partial structure at N; Figure 7 Provided by another embodiment of the present invention Figure 4 Enlarged schematic diagram of the partial structure at M; Figure 8Partial structural cross-sectional view between the seed bin, the partition frame, the partition space, the seeding tube and the adjustment mechanism provided by another embodiment of the present invention; Figure 9 Provided by another embodiment of the present invention Figure 1 Schematic enlarged view of the partial structure at S.

[0019] Explanation of reference numerals: 1. Frame; 10. Seed bin; 100. Partition frame; 101. Partition space; 11. Seeding wheel; 110. Rubber wheel; 111. Iron ring; 112. Iron sheet; 2. Seeding assembly; 20. Seeding tube; 21. Rotary tillage mechanism; 210. Adjusting rod; 2100. Adjusting hole; 211. Insert rod; 212. Locking spring; 213. Rotary tillage plate; 2130. Fixed section; 2131. Sliding section; 2132. Through hole; 214. Telescopic rod; 2140. Tip end; 2141. Connecting part; 215. Slide rod; 2150. Spiral groove; 216. Drill bit; 2160. Spiral block; 217. Return spring; 22. Adjustment mechanism; 220. Square shaft; 221. Adjusting block; 222. Connecting sleeve; 223. Adjusting sleeve; 3. Driving assembly; 30. Driving synchronous pulley; 31. Seeding synchronous pulley; 32. First synchronous belt; 33. Sand falling synchronous pulley; 34. Second synchronous belt; 4. Sand covering assembly; 40. Sand bin; 41. Sand falling tube; 42. Sand falling roller; 43. Swing rod; 44. Pressing roller unit; 440. Roller column; 441. Gathering plate. Detailed implementation manners

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "vertical", "horizontal", "side", "inner", "outer", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0022] As Figure 1-9 shown, an alfalfa saline-alkali land seeding and sand covering integrated device provided by an embodiment of the present invention includes a frame 1, a seed bin 10 is arranged at the upper end of the frame 1, a seeding wheel 11 is rotatably arranged on each side of the frame 1, a seeding assembly 2 is arranged at the lower end of the seed bin 10, a driving assembly 3 is arranged between the seeding wheel 11 and the seeding assembly 2, a sand covering assembly 4 is arranged on the frame 1, the sand covering assembly 4 is arranged on the side of the seeding assembly 2, and the driving assembly 3 is used to drive the seeding assembly 2 to sow and drive the sand covering assembly 4 to cover sand; Sowing assembly 2, the sowing assembly 2 includes a plurality of sowing tubes 20, the plurality of sowing tubes 20 are uniformly arranged along the length direction of the seed bin 10, the upper end of the sowing tube 20 is communicated with the seed bin 10, a plurality of rotary tillage mechanisms 21 are arranged on the frame 1, the number of the rotary tillage mechanisms 21 is the same as the number of the sowing tubes 20, the rotary tillage mechanism 21 can create gullies with different depths on the saline-alkali land so that the sowing tubes 20 can be inserted with alfalfa seeds, the lower end of the sowing tube 20 is arranged on the lower side of the rotary tillage mechanism 21, and an adjusting mechanism 22 is arranged between the upper end of the sowing tube 20 and the seed bin 10, and the adjusting mechanism 22 is used to adjust the number of alfalfa seeds dropped from the seed bin 10; Sand covering assembly 4, the sand covering assembly 4 includes a sand bin 40, the sand bin 40 is arranged on the frame 1, a plurality of sand dropping tubes 41 are uniformly arranged at the lower end of the sand bin 40, the number of the sand dropping tubes 41 is the same as the number of the sowing tubes 20, and the sand dropping tubes 41 are uniformly arranged along the length direction of the sand bin 40, a sand dropping roller 42 is arranged between the sand bin 40 and the sand dropping tubes 41, a plurality of sand dropping grooves are arranged at the intersection of the sand dropping roller 42 and each sand dropping tube 41, and the sand dropping grooves are uniformly arranged along the circumferential direction of the sand dropping roller 42, the sand dropping roller 42 is used to control the sand amount, a plurality of swing rods 43 are rotatably arranged on the frame 1, and a pressing roller unit 44 is rotatably arranged at one end of the swing rod 43 away from the frame 1, and the lower ends of the sowing tube 20, the sand dropping tube 41 and the pressing roller unit 44 are on the same straight line.

[0023] In another embodiment provided by the present invention, the sowing wheel 11 includes a rubber wheel 110, the rubber wheel 110 is rotatably arranged on the frame 1, and an iron ring 111 is further arranged outside the rubber wheel 110, and a plurality of iron sheets 112 are uniformly arranged outside the iron ring 111; The specific implementation method is as follows: the rubber wheels 110 are symmetrically arranged on both sides of the frame 1 for supporting and towing the frame 1, the iron ring 111 is used for installing the iron sheets 112, and the outer side of the iron sheets 112 protrudes 5-10 mm from the edge of the rubber wheel 110. In this way, under the gravity borne by the seed bin 10 and the sand bin 40, the iron sheets 112 can be embedded into the saline-alkali land one by one under the rotation of the rubber wheel 110, so that there will be no long-distance sliding between the rubber wheel 110 and the saline-alkali land, ensuring that the frame 1 moves accurately along with the rubber wheel 110.

[0024] In another embodiment provided by the present invention, the driving assembly 3 includes a driving synchronous wheel 30, the driving synchronous wheel 30 is connected with the sowing wheel 11, a sowing synchronous wheel 31 is arranged at the side end of the adjusting mechanism 22, and the sowing synchronous wheel 31 is connected with the driving synchronous wheel 30 through a first synchronous belt 32, one end of the sand dropping roller 42 is provided with a sand dropping synchronous wheel 33, and the driving synchronous wheel 30 is connected with the sand dropping synchronous wheel 33 through a second synchronous belt 34; The specific implementation method is as follows: When a device such as a tractor drives the seeding and sand covering integrated device to move, the rubber wheel 110 drives the driving synchronous wheel 30 to rotate synchronously, so that the driving synchronous wheel 30 drives the seeding synchronous wheel 31 to rotate through the first synchronous belt 32, thereby enabling the seeding synchronous wheel 31 to drive the adjusting mechanism 22 to rotate and sow alfalfa seeds; at the same time, the rubber wheel 110 drives the sand falling synchronous wheel 33 to rotate through the second belt by the driving synchronous wheel 30, so that the sand falling synchronous wheel 33 drives the sand falling roller 42 to rotate, thereby enabling the sand falling roller 42 to evenly convey the sand and soil in the sand bin 40, so that the sand and soil in the sand bin 40 falls from the sand falling pipe 41 to cover the sown alfalfa seeds.

[0025] In another embodiment provided by the present invention, a partition frame 100 is provided in the seed bin 10. The partition frame 100 includes a plurality of partition spaces 101, and the partition spaces 101 are used to separate the seed bin 10; The specific implementation method is as follows: The number of the partition spaces 101 is the same as the number of the seeding pipes 20. The partition frame 100 provided in the seed bin 10 evenly separates the seed bin 10 through the partition spaces 101 therein, so that the mixture of alfalfa seeds and fine sand evenly falls into the seeding pipes 20 through the partition spaces 101, avoiding the situation that due to reasons such as vibration, the alfalfa seeds lean towards one side of the seed bin 10, resulting in no alfalfa seeds falling into some of the seeding pipes 20 for sowing.

[0026] In another embodiment provided by the present invention, the rotary tillage mechanism 21 includes an adjusting rod 210. The adjusting rods 210 are all arranged on the frame 1 in a sliding manner. A plug rod 211 is arranged on the frame 1 in a sliding manner. A locking spring 212 is arranged between the plug rod 211 and the frame 1. A plurality of adjusting holes 2100 are evenly arranged on the adjusting rod 210 along the length direction, and one end of the plug rod 211 is inserted into the adjusting hole 2100; The specific implementation method is as follows: Before sowing, adjust the sowing depth of the alfalfa seeds sown by the seeding and sand covering integrated device according to the actual sowing situation of the saline-alkali land. Specifically, manually pull the plug rod 211 outward from the frame 1, so that the plug rod 211 compresses the locking spring 212 and disengages from the adjusting hole 2100, thereby enabling the plug rod 211 to release the locking and fixing of the adjusting rod 210, so as to adjust the height of the adjusting rod 210 on the frame 1, enabling the adjusting rod 210 to adjust the height of the rotary tillage mechanism 21. After the position of the adjusting rod 210 is adjusted, release the plug rod 211, so that the locking spring 212 drives the plug rod 211 to reset, thereby enabling the plug rod 211 to be inserted into the adjusting hole 2100 of the adjusting rod 210, so that the plug rod 211 locks and fixes the position of the adjusting rod 210, thereby enabling the rotary tillage mechanism 21 to create a suitable-depth gully on the saline-alkali land.

[0027] In another embodiment provided by the present invention, the rotary tillage mechanism 21 further includes a rotary tillage plate 213. The rotary tillage plate 213 includes a fixed section 2130 and a sliding section 2131. Both the fixed section 2130 and the sliding section 2131 are arc-shaped plates. The fixed section 2130 is arranged in the middle of the adjusting rod 210. The sliding section 2131 is arranged on the lower side of the adjusting rod 210 through a telescopic rod 214. A pointed end portion 2140 is arranged at the lower end of the sliding section 2131, and a connecting portion 2141 is arranged at the upper end of the sliding section 2131. The sliding section 2131 is arranged on the lower side of the fixed section 2130 in a sliding manner through the connecting portion 2141, and the sliding section 2131 is connected to the extended end of the telescopic rod 214. The lower end of the sliding section 2131 is lower than the lower end of the adjusting rod 210; The specific implementation method is as follows: A triangular knife is arranged on the surface of the pointed end portion 2140. The triangular knife improves the ability of the pointed end portion 2140 to break the saline-alkali land while increasing the strength of the pointed end portion 2140. In this way, when a tractor or other equipment drives the seeding and sand covering integrated equipment to move and sow, the sliding section 2131 of the rotary tillage plate 213 contacts the saline-alkali ground surface, so that the pointed end portion 2140 and the triangular knife of the sliding section 2131 open gullies on the saline-alkali ground surface. And when the pointed end portion 2140 encounters the hard ground of the saline-alkali land, to avoid damage to the pointed end portion 2140, the telescopic rod 214 drives the sliding section 2131 to move towards the adjusting rod 210, so that the sliding section 2131 makes a concession, thereby avoiding damage to the sliding section 2131 caused by directly contacting the hard ground of the saline-alkali land. And through the connecting portion 2141, the sliding section 2131 is still connected to the fixed portion after making a concession, so that the soil after the sliding section 2131 opens gullies on the saline-alkali land can be discharged to the side of the gully through the fixed section 2130.

[0028] In another embodiment provided by the present invention, a through hole 2132 is arranged in the middle of the lower side of the sliding section 2131. A sliding rod 215 is arranged at the lower end of the adjusting rod 210 in a rotatable manner. A drill bit 216 is arranged on the outer side of the sliding rod 215 in a sliding manner. One end of the drill bit 216 away from the adjusting rod 210 is arranged in the through hole 2132. And two spiral grooves 2150 are arranged on the outer side of the sliding rod 215. Two spiral blocks 2160 are correspondingly arranged in the drill bit 216. The spiral blocks 2160 are arranged in the spiral blocks 2160 in a sliding manner. A return spring 217 is arranged in the drill bit 216; The specific implementation method is as follows: When the telescopic rod 214 drives the sliding section 2131 to move towards the adjusting rod 210 so that the sliding section 2131 makes way to avoid damage to the tip 2140, the adjusting rod 210 drives the sliding rod 215 to continue moving forward. At this time, the sliding rod 215 can squeeze the return spring 217 to slide into the drill bit 216. At the same time, the adjusting rod 210 can drive the sliding rod 215 and the drill bit 216 to pass through the through hole 2132 of the tip 2140, so that the drill bit 216 contacts the hard part of the saline-alkali land. And when the sliding rod 215 slides along the drill bit 216, under the action of the spiral block 2160 and the spiral groove 2150, the drill bit 216 can rotate on the sliding rod 215, so that the rotated drill bit 216 drills and crushes the hard part of the saline-alkali land. After the drill bit 216 breaks the hard part of the saline-alkali land, the return spring 217 drives the drill bit 216 to reset. At the same time, the tip 2140 of the sliding end resets under the action of the telescopic rod 214 and continues to dig trenches in the saline-alkali land.

[0029] In another embodiment provided by the present invention, the adjusting mechanism 22 includes a square shaft 220. A plurality of adjusting blocks 221 are uniformly arranged on the outer side of the square shaft 220 in a sliding manner along its length direction. Each upper end of each sowing tube 20 is provided with an adjusting block 221. A plurality of sowing grooves are uniformly arranged on the outer side of the adjusting block 221 along its circumferential direction. And the adjusting block 221 is arranged at the lower end of the seed bin 10 in a sliding manner. Adjacent two adjusting blocks 221 are connected by a connecting sleeve 222. One end of the seed bin 10 is provided with an adjusting sleeve 223 in a threaded fit manner. The adjusting sleeve 223 is rotatably connected with the adjusting block 221 at the end of the square shaft 220. The specific implementation method is as follows: Before sowing, by rotating the adjusting sleeve 223, the adjusting sleeve 223 moves along the seed bin 10 under the action of the thread, so that different lengths of the sowing grooves on the adjusting block 221 are exposed, in order to adjust the sowing density of alfalfa seeds; when the rubber wheel 110 drives the driving synchronous wheel 30 to rotate synchronously, the driving synchronous wheel 30 can drive the square shaft 220 to rotate through the first synchronous belt 32 and the sowing synchronous wheel 31, so that the square shaft 220 drives a plurality of adjusting blocks 221 sleeved thereon to rotate synchronously. Thus, the rotating adjusting block 221 conveys alfalfa seeds from the seed bin 10 to the sowing tube 20 through the sowing grooves provided thereon, so that the sowing tube 20 conveys the alfalfa seeds into the trenches dug by the sliding section 2131 on the saline-alkali land.

[0030] In another embodiment provided by the present invention, the roller pressing unit 44 includes a roller column 440. The roller column 440 is rotatably arranged at one end of the swing rod 43 away from the frame 1. Two converging plates 441 are sleeved on the outer side of the roller column 440. The converging plates 441 are arranged on the swing rod 43. The two converging plates 441 are in a flared shape, and the openings of the two converging plates 441 gradually narrow in the direction away from the frame 1. The specific implementation method is as follows: After sowing alfalfa seeds, the rubber wheel 110 drives the driving synchronous wheel 30 to drive the sand-falling synchronous wheel 33 to rotate through the second belt, so that the sand-falling synchronous wheel 33 drives the sand-falling roller 42 to rotate, so that the sand-falling roller 42 evenly conveys the sandy soil in the sand bin 40, so that the sandy soil in the sand bin 40 falls from the sand-falling pipe 41 to cover the sown alfalfa seeds. After the alfalfa seeds are covered with sand, the frame 1 moves with equipment such as a tractor, so that the frame 1 drives the swing rod 43 to move synchronously, so that the swing rod 43 pulls the roller column 440 to flatten the fallen sandy soil. When the roller column 440 flattens the sandy soil, the edges of the sandy soil for covering are gathered by the two gathering plates 441 to avoid the situation of loosening and loss of the sandy soil for sand covering.

[0031] Furthermore, a partition block is arranged inside the sowing pipe 20. The space between the partition block and the inner wall of the sowing pipe 20 is evenly divided into a plurality of blanking pores, and the upper end of the partition block is conical. In this way, the partition block evenly distributes the alfalfa seeds falling from the seed bin 10 into the sowing pipe 20, facilitating the alfalfa seeds falling from the sowing pipe 20 to be evenly distributed in the trenches opened at the tip 2140 of the sliding section 2131, and avoiding the situation of stacking of the alfalfa seeds falling from the sowing pipe 20.

[0032] A method for sowing and sand covering of alfalfa in saline-alkali land. The method for sowing and sand covering of alfalfa in saline-alkali land is applicable to the above-mentioned equipment for sowing and sand covering of alfalfa in saline-alkali land, and includes the following steps: Step 1: Install the seeding and sand covering integrated equipment on other farming equipment such as tractors through the frame 1. After the seeding and sand covering integrated equipment is installed, add the alfalfa seeds mixed with fine sand in proportion to the seed bin 10 to increase the fluidity of the seeds by using sand grains and ensure uniform distribution during sowing. Add fine soil mixed with sand or sandy soil to the sand bin 40. After the seed bin 10 and the sand bin 40 are filled with the corresponding alfalfa seeds and sandy soil respectively, the seeding and sand covering integrated equipment can be driven by equipment such as tractors to move for sowing. And by rotating the adjusting sleeve 223, the adjusting sleeve 223 moves along the square shaft 220 through the thread fit with the seed bin 10, so that the adjusting sleeve 223 adjusts the position of the adjusting block 221 through the connecting sleeve 222, making different lengths of the sowing grooves on the adjusting block 221 exposed, and the adjusting block 221 adjusts the quantity of alfalfa seeds falling from the seed bin 10 to adjust the seeding density of alfalfa seeds. In addition, pull the inserting rod 211 outward, making the inserting rod 211 squeeze the locking spring 212 and disengage from the adjusting hole 2100 on the adjusting rod 210, so that the inserting rod 211 releases the locking and fixing of the adjusting rod 210 to adjust the position of the adjusting rod 210 on the frame 1. After the position adjustment of the adjusting rod 210 is completed, release the inserting rod 211, making the locking spring 212 drive the inserting rod 211 to reset, so that the inserting rod 211 inserts into the adjusting hole 2100 of the adjusting rod 210, and the inserting rod 211 locks and fixes the position of the adjusting rod 210, thereby adjusting the depth of breaking and trenching of the rotary tillage plate 213 on the saline-alkali land; The number of the separation spaces 101 of the separation frame 100 is the same as the number of the sowing pipes 20. The separation frame 100 provided in the seed bin 10 evenly separates the seed bin 10 through the separation spaces 101 therein, so that the mixture of alfalfa seeds and fine sand can evenly fall into the sowing pipes 20 through the separation spaces 101, avoiding the situation that due to reasons such as vibration, the alfalfa seeds lean towards one side of the seed bin 10, resulting in no alfalfa seeds falling and sowing in some sowing pipes 20; Step 2: During the process of the tractor and other equipment driving the seeding and sand covering integrated equipment to move and sow, the sliding section 2131 of the rotary tillage plate 213 is used to break and open the saline-alkali land. Specifically, when the pointed end 2140 of the sliding section 2131 breaks and opens the ditch, as the tractor and other equipment drive the seeding and sand covering integrated equipment to move and sow, the sliding section 2131 of the rotary tillage plate 213 contacts the saline-alkali ground, so that the pointed end 2140 of the sliding section 2131 and the triangular knife open the gully on the saline-alkali ground. At the same time, the telescopic rod 214 drives the sliding section 2131 to slide on the adjusting rod 210, causing the sliding section 2131 to make way, thus avoiding damage to the pointed end 2140 at the lower end of the sliding section 2131. When the sliding section 2131 moves back and retracts towards the adjusting rod 210, the adjusting rod 210 drives the sliding rod 215 to move, so that the sliding rod 215 compresses the return spring 217. As a result, the drill bit 216 rotates outside the sliding rod 215 under the action of the spiral groove 2150 and the spiral block 2160, causing the drill bit 216 to rotate and pass through the through hole 2132 in the middle of the lower side of the sliding section 2131, so that the drill bit 216 contacts the hard part of the saline-alkali land. When the sliding rod 215 slides along the drill bit 216, under the action of the spiral block 2160 and the spiral groove 2150, the drill bit 216 can rotate on the sliding rod 215, causing the rotated drill bit 216 to drill and crush the hard part of the saline-alkali land, so as to break and open the ditch at the hard position of the saline-alkali land by the drill bit 216. After the sliding section 2131 passes through the hard position of the saline-alkali land, the telescopic rod 214 drives the sliding section 2131 to reset, and at the same time the return spring 217 drives the drill bit 216 to reset. When the sliding section 2131 moves with the telescopic rod 214, the connection with the fixed section 2130 is maintained through the connecting part 2141, so that the soil dug out when the sliding section 2131 breaks and opens the ditch is discharged to the side of the gully through the fixed section 2130. While the tractor and other equipment drive the seeding and sand covering integrated equipment to move and sow, the seeding wheel 11 rotates as the seeding and sand covering integrated equipment moves, so that the rubber wheel 110 drives the iron ring 111 to rotate, so that the iron ring 111 rotates with the rubber wheel 110, causing the iron ring 111 to drive the patch to rotate and insert into the land, ensuring the accurate rotation of the seeding wheel 11 and avoiding the situation where the seeding wheel 11 only moves with the tractor and other equipment without rotating;When the seeding wheel 11 rotates, it drives the driving synchronous wheel 30 to rotate synchronously, so that the driving synchronous wheel 30 drives the square shaft 220 to rotate through the first synchronous belt 32 and the seeding synchronous wheel 31, and the square shaft 220 drives the adjusting block 221 to rotate, so that the alfalfa seeds fall into the seeding pipe 20 as the adjusting block 221 rotates. The seeding pipe 20 places the alfalfa seeds falling into it into the gully opened by the crushing of the sliding section 2131. During the seeding process of the alfalfa seeds, the seeding wheel 11 drives the driving synchronous wheel 30 to rotate, so that the driving synchronous wheel 30 drives the sand falling roller 42 to rotate through the second synchronous belt 34 and the sand falling synchronous wheel 33, so that the sand in the sand bin 40 falls into the sand falling groove outside the sand falling roller 42, so that the sand falling roller 42 conveys the sand into the sand falling pipe 41 when it rotates, and the sand falling pipe 41 covers the sand in the sand bin 40 on the alfalfa seeds sown by the seeding pipe 20, so that the sand covers and compacts the alfalfa seeds sown in the gully opened by the crushing of the sliding section 2131. After the sand covers the alfalfa seeds, the frame 1 drives the swing rod 43 to move synchronously, so that the swing rod 43 drives the roller column 440 to rotate on the ground, so that the roller column 440 flattens the sand falling from the sand falling pipe 41, and at the same time, the two gathering plates 441 sleeved outside the roller column 440 gather the edges of the sand used for covering; Step 3: After the alfalfa seeds are sown and covered with sand, drive the seeding and sand covering integrated equipment away from the seeding area by means of a tractor or other equipment, and clean the seeding and sand covering integrated equipment. After cleaning, remove the seeding and sand covering integrated equipment from the tractor or other equipment.

[0033] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present invention, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of the claims of the present invention.

Claims

1. An alfalfa saline-alkali land sowing and sand covering integrated equipment, comprising a frame (1), a seed bin (10) being arranged at the upper end of the frame (1), a sowing wheel (11) being rotatably arranged on each side of the frame (1), a sowing assembly (2) being arranged at the lower end of the seed bin (10), a driving assembly (3) being arranged between the sowing wheel (11) and the sowing assembly (2), a sand covering assembly (4) being arranged on the frame (1), the sand covering assembly (4) being arranged on the side of the sowing assembly (2), the driving assembly (3) being used to drive the sowing assembly (2) to sow and drive the sand covering assembly (4) to cover with sand, characterized in that: A sowing assembly (2), the sowing assembly (2) comprising a plurality of sowing tubes (20), the plurality of sowing tubes (20) being evenly arranged along the length direction of the seed bin (10), the upper ends of the sowing tubes (20) being connected to the seed bin (10), the frame (1) being provided with a plurality of rotary tillage mechanisms (21), the number of the rotary tillage mechanisms (21) being the same as the number of the sowing tubes (20), the rotary tillage mechanisms (21) being capable of opening grooves of different depths on saline-alkali land so that the sowing tubes (20) can be placed with alfalfa seeds, the lower ends of the sowing tubes (20) being arranged below the rotary tillage mechanisms (21), an adjustment mechanism (22) being arranged between the upper ends of the sowing tubes (20) and the seed bin (10), the adjustment mechanism (22) being used to adjust the number of alfalfa seeds dropped from the seed bin (10); A sand covering component (4), the sand covering component (4) comprising a sand bin (40), the sand bin (40) being arranged on the frame (1), a plurality of sand falling pipes (41) being evenly arranged at the lower end of the sand bin (40), the number of the sand falling pipes (41) being the same as the number of the sowing pipes (20), and the sand falling pipes (41) being evenly arranged along the length direction of the sand bin (40), a sand falling roller (42) being arranged between the sand bin (40) and the sand falling pipes (41), and a plurality of sand falling pipes (41) being arranged on the lower end of the sand bin (40) and each of the sand falling pipes (41) A plurality of sand dropping grooves are provided at the intersection of each of the sand dropping pipes (41), and the sand dropping grooves are evenly arranged along the circumference of the sand dropping roller (42). The sand dropping roller (42) is used to control the amount of sand. A plurality of swinging rods (43) are rotatably provided on the frame (1). A pressure roller unit (44) is rotatably provided at one end of the swinging rod (43) away from the frame (1). The lower end of the sowing pipe (20), the lower end of the sand dropping pipe (41) and the pressure roller unit (44) are located on the same straight line.

2. The alfalfa saline-alkali land sowing and sand covering integrated equipment according to claim 1, characterized in that: The seeding wheel (11) comprises a rubber wheel (110), the rubber wheel (110) being rotatably arranged on the frame (1), an iron ring (111) being arranged outside the rubber wheel (110), and a plurality of iron sheets (112) being evenly arranged outside the iron ring (111).

3. The alfalfa saline-alkali land sowing and sand covering integrated equipment according to claim 1 is characterized in that: The driving assembly (3) comprises a driving synchronous wheel (30), the driving synchronous wheel (30) being connected to the seeding wheel (11), a seeding synchronous wheel (31) being provided at a side end of the adjusting mechanism (22), the seeding synchronous wheel (31) being connected to the driving synchronous wheel (30) via a first synchronous belt (32), a sand falling synchronous wheel (33) being provided at one end of the sand falling roller (42), and the driving synchronous wheel (30) being connected to the sand falling synchronous wheel (33) via a second synchronous belt (34).

4. The alfalfa saline-alkali land sowing and sand covering integrated equipment according to claim 1, characterized in that: A partition frame (100) is provided in the seed bin (10), wherein the partition frame (100) comprises a plurality of partition spaces (101), and the partition spaces (101) are used to separate the seed bin (10).

5. The alfalfa saline-alkali land sowing and sand covering integrated equipment according to claim 1, characterized in that: The rotary tillage mechanism (21) comprises an adjustment rod (210), the adjustment rod (210) being slidably arranged on the frame (1), an insertion rod (211) being slidably arranged on the frame (1), a locking spring (212) being arranged between the insertion rod (211) and the frame (1), a plurality of adjustment holes (2100) being evenly arranged on the adjustment rod (210) along the length direction, one end of the insertion rod (211) being inserted into the adjustment hole (2100).

6. The alfalfa saline-alkali land sowing and sand covering integrated equipment according to claim 5, characterized in that: The rotary tillage mechanism (21) further comprises a rotary tillage plate (213), the rotary tillage plate (213) comprising a fixed section (2130) and a sliding section (2131), the fixed section (2130) and the sliding section (2131) both being arc plates, the fixed section (2130) being arranged at the middle of the adjusting rod (210), the sliding section (2131) being arranged at the lower side of the adjusting rod (210) via a telescopic rod (214), a tip portion (2140) being arranged at the lower end of the sliding section (2131), a connecting portion (2141) being arranged at the upper end of the sliding section (2131), the sliding section (2131) being arranged at the lower side of the fixed section (2130) in a sliding manner via the connecting portion (2141), the sliding section (2131) being connected to the protruding end of the telescopic rod (214), and the lower end of the sliding section (2131) being lower than the lower end of the adjusting rod (210).

7. The alfalfa saline-alkali land sowing and sand covering integrated equipment according to claim 6, characterized in that: A through hole (2132) is provided in the middle of the lower side of the sliding section (2131); a sliding rod (215) is rotatably provided at the lower end of the adjusting rod (210); a drill bit (216) is slidably provided on the outer side of the sliding rod (215); an end of the drill bit (216) away from the adjusting rod (210) is provided in the through hole (2132); two spiral grooves (2150) are provided on the outer side of the sliding rod (215); two spiral blocks (2160) are correspondingly provided in the drill bit (216); the spiral block (2160) is slidably provided in the spiral block (2160); and a return spring (217) is provided in the drill bit (216).

8. The alfalfa saline-alkali land sowing and sand covering integrated equipment according to claim 1, characterized in that: The adjustment mechanism (22) comprises a square shaft (220), a plurality of adjustment blocks (221) are evenly arranged on the outside of the square shaft (220) along its length direction in a sliding manner, one adjustment block (221) is arranged at the upper end of each sowing tube (20), a plurality of sowing grooves are evenly arranged on the outside of the adjustment block (221) along its circumference, and the adjustment block (221) is arranged at the lower end of the seed bin (10) in a sliding manner, two adjacent adjustment blocks (221) are connected via a connecting sleeve (222), one end of the seed bin (10) is provided with an adjustment sleeve (223) in a threaded manner, and the adjustment sleeve (223) is rotatably connected to the adjustment block (221) at the end of the square shaft (220).

9. The alfalfa saline-alkali land sowing and sand covering integrated equipment according to claim 1, characterized in that: The pressure roller unit (44) comprises a roller column (440), the roller column (440) being rotatably arranged at one end of the swing rod (43) away from the frame (1), two gathering plates (441) being sleeved on the outer side of the roller column (440), the gathering plates (441) being arranged on the swing rod (43), the two gathering plates (441) being in a trumpet shape, and the openings of the two gathering plates (441) gradually narrow in a direction away from the frame (1).

10. A method for sowing and covering alfalfa in saline-alkali land, characterized in that: The alfalfa saline-alkali land sowing and sand-covering integrated method is applicable to the alfalfa saline-alkali land sowing and sand-covering integrated equipment according to any one of claims 1 to 9, comprising the following steps: The first step is to install the integrated sowing and sand covering device on a tractor or other equipment for planting land through a frame (1). After the integrated sowing and sand covering device is installed, alfalfa seeds mixed with fine sand in proportion are added to the seed bin (10) so as to increase the fluidity of the seeds by using the sand particles to ensure uniform distribution during sowing. Sand or fine soil mixed with sand is added to the sand bin (40). After the seed bin (10) and the sand bin (40) are respectively filled with corresponding alfalfa seeds and sand, the integrated sowing and sand covering device can be driven by a tractor or other equipment to move for sowing, and the adjusting sleeve (223) is rotated so that the adjusting sleeve (223) is engaged with the thread of the seed bin (10) and moves along the adjusting sleeve. The square shaft (220) moves, so that the adjusting sleeve (223) adjusts the position of the adjusting block (221) through the connecting sleeve (222), so that the adjusting block (221) adjusts the amount of alfalfa seeds falling from the seed bin (10). In addition, the inserting rod (211) is pulled outward, so that the inserting rod (211) squeezes the locking spring (212) and disengages from the adjusting hole (2100) on the adjusting rod (210), so that the inserting rod (211) releases the locking fixation of the adjusting rod (210), so as to adjust the position of the adjusting rod (210) on the frame (1), thereby adjusting the depth of the crushing and furrowing of the rotary tillage plate (213) on the saline-alkali land; Step 2: During the sowing process, the sliding section (2131) of the rotary tillage plate (213) is used to break and furrow the saline-alkali land. When the tip portion (2140) of the sliding section (2131) breaks and furrows, the sliding section (2131) is driven to slide on the adjusting rod (210) by the telescopic rod (214), thereby preventing the tip portion (2140) at the lower end of the sliding section (2131) from being damaged. The sliding section (2131) is moved to the adjusting rod (210). When the adjusting rod (210) moves and retracts, the adjusting rod (210) drives the sliding rod (215) to move, so that the sliding rod (215) squeezes the return spring (217), thereby causing the drill bit (216) to rotate outside the sliding rod (215) under the action of the spiral groove (2150) and the spiral block (2160), so that the drill bit (216) rotates and passes through the through hole (2132) in the middle of the lower side of the sliding section (2131), so that the drill bit (216) can drill the saline-alkali land. The sliding section (2131) is used to break and dig a trench at a hard position. After the sliding section (2131) passes through the hard position of the saline-alkali land, the telescopic rod (214) drives the sliding section (2131) to reset. At the same time, the reset spring (217) drives the drill bit (216) to reset. When the sliding section (2131) moves with the telescopic rod (214), the sliding section (2131) maintains a connection with the fixed section (2130) through the connecting portion (2141), so that the soil excavated by the sliding section (2131) during the breaking and digging passes through the hard position of the saline-alkali land. The fixed segments (2130) are arranged to the side, and when a tractor or other equipment drives the integrated sowing and sand covering device to move and sow, the sowing wheel (11) rotates along with the movement of the integrated sowing and sand covering device, so that the rubber wheel (110) drives the iron ring (111) to rotate, so that the iron ring (111) rotates along with the rubber wheel (110), so that the iron ring (111) drives the patch to rotate and insert into the soil, thereby ensuring that the sowing wheel (11) rotates accurately, and avoiding the situation where the sowing wheel (11) only moves along with the tractor or other equipment without rotating;When the seeding wheel (11) rotates, it drives the driving synchronous wheel (30) to rotate synchronously, so that the driving synchronous wheel (30) drives the square shaft (220) to rotate through the seeding synchronous wheel (31) via the first synchronous belt (32), so that the square shaft (220) drives the adjusting block (221) to rotate, so that the alfalfa seeds fall into the seeding tube (20) as the adjusting block (221) rotates, so that the seeding tube (20) puts the alfalfa seeds that fall into it into the grooves broken and opened by the sliding section (2131). During the alfalfa seed sowing process, the seeding wheel (11) drives the driving synchronous wheel (30) to rotate, so that the driving synchronous wheel (30) drives the sand falling roller (42) to rotate through the second synchronous belt (34) and the sand falling synchronous wheel (33), so that the sand in the sand bin (40) falls into the grooves. The sand dropping groove outside the sand dropping roller (42) is provided so that the sand dropping roller (42) can transport the sand into the sand dropping pipe (41) when rotating, so that the sand dropping pipe (41) covers the sand in the sand bin (40) on the alfalfa seeds sown by the sowing pipe (20), so that the sand covers and fills the alfalfa seeds sown in the grooves broken by the sliding section (2131). After the sand covers the alfalfa seeds, the frame (1) drives the swing rod (43) to move synchronously, so that the swing rod (43) drives the roller column (440) to rotate on the ground, so that the roller column (440) flattens the sand falling from the sand dropping pipe (41), and at the same time, the edges of the covering sand are gathered by two gathering plates (441) sleeved on the outside of the roller column (440); Step 3: After the alfalfa seeds are sown and covered with sand, the sowing and sand-covering integrated equipment is driven away from the sowing area by tractors and other equipment, and the sowing and sand-covering integrated equipment is cleaned. After the cleaning is completed, the sowing and sand-covering integrated equipment is removed from tractors and other equipment.

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