A sowing method suitable for heavy clay soil operations

Abstract

The invention discloses a sowing method suitable for heavy clay soil operation, comprising the following steps: firstly, adjusting the distance between adjacent furrowing rings according to the sowing row spacing requirement; the walking device walks to the initial operation position of the field, lowering the rotary tillage and fertilization composite operation device, the rotary tillage and fertilization composite operation device is provided with a plurality of position-adjustable mixed fertilizer application areas, the sowing device is lowered, and the position of the mixed fertilizer application area in the left and right directions is adjusted according to the sowing row spacing; after the adjustment is completed, the field is rotary tilled by the rotary tillage and fertilization composite operation device, soil blocks after rotary tillage are thrown backwards to be crushed, and the soil blocks in the mixed fertilizer application area are discharged after being crushed and mixed with fertilizer, so as to realize strip application of mixed fertilizer, and fine soil is discharged from adjacent mixed fertilizer application areas to the field; the seeding device is activated, and the seeds discharged downward by the seeding device and the seeds discharged by the seeding tube fall on the field on one side of the mixed fertilizer application area in the left and right directions; the invention can adapt to crops with different sowing row spacing requirements, and has a wider range of applications.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural planting, in particular to a sowing method suitable for heavy clay soil operations. Background Art

[0002] Good tillage layer quality provides a high-quality seedbed for agricultural sowing, and sowing depth is an important parameter affecting seed emergence. Heavy clay soil has strong cohesiveness and large soil aggregates. The soil blocks are not easy to break during tillage, and the suitability for tillage is poor. In the traditional sowing process, a rotary tillage and sowing compound operation machine is used for sowing. The rotary tillage and sowing compound operation machine includes a sowing machine frame, a sowing box is fixedly connected to the sowing machine frame, and a number of seeding devices are arranged on the lower side of the sowing box. The rotary tillage part of the rotary tillage and sowing compound operation machine mostly adopts a single-axis rotary tillage. The heavy clay soil is not crushed enough, resulting in large soil blocks in the tillage layer. The large soil blocks in the tillage layer are easily suspended and form gaps. When sowing, the seeds will be irregularly distributed in the entire tillage layer (generally 0-12 cm), making it difficult to achieve controlled depth sowing, which will seriously affect the crop emergence rate in the later stage. Therefore, it is necessary to increase the sowing amount to provide the emergence rate during cultivation, thereby increasing the cost of agricultural materials; in addition, it can only sow under a fixed sowing row spacing and cannot adapt to operations with different sowing row spacings. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the sowing process in the prior art cannot realize controlled depth sowing, and the seed grains are irregularly distributed in the tillage layer during sowing.

[0004] In order to solve the above technical problems, the present invention provides a sowing method suitable for operations in heavy clay soils, which can adjust the position of a furrowing ring according to the sowing row spacing to adapt to the operating requirements of different sowing row spacings. In addition, the soil blocks after rotary tillage are further crushed and discharged into the field, providing a stable furrowing plane for the furrowing ring when furrowing, thereby achieving depth-controlled sowing and improving the quality of crop emergence.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: a sowing method suitable for heavy clay soil operations, wherein the sowing device used for sowing comprises a sowing machine frame, a sowing box is fixedly connected to the sowing machine frame, a pressing wheel is rotatably connected to the lower part of the front end of the sowing machine frame, two groups of furrowing assemblies are arranged on the pressing wheel, a furrowing gap is provided between the two groups of furrowing assemblies, the two groups of furrowing assemblies comprise a plurality of furrowing rings connected to the outer periphery of the pressing wheel, a plurality of seeding devices corresponding to the furrowing rings are respectively arranged on the lower side of the sowing box on the left and right sides of the furrowing gap; the axial position of the furrowing ring is adjustable, a soft seeding tube is fixedly connected to the lower side of the seeding device, and the axial position of the lower part of the seeding tube corresponds to the position of the furrowing ring; the steps comprising the following steps are included:

[0006] First, adjust the distance between adjacent furrowing rings according to the sowing row spacing requirements;

[0007] The walking device walks to the initial operation position of the field, and the rotary tillage and fertilization composite operation device is lowered. The rotary tillage and fertilization composite operation device is provided with a plurality of position-adjustable mixed fertilizer application areas. The sowing device is lowered, and the position of the mixed fertilizer application area in the left and right directions is adjusted according to the sowing row spacing. After the adjustment is completed, the field is rotary tilled with the rotary tillage and fertilization composite operation device, and the soil blocks after rotary tillage are thrown backwards to be crushed. The soil blocks in the mixed fertilizer application area are crushed and mixed with fertilizers, and the mixed fine soil and fertilizers are discharged together on the field to realize strip application of mixed fertilizers, and the crushed fine soil is discharged between adjacent mixed fertilizer application areas to the field;

[0008] At the same time, the seed meter is in operation, and the seeds discharged downward by the seed meter are discharged through the seed meter tube and fall onto the field on one side of the mixed fertilizer application area in the left and right direction.

[0009] As a preferred solution of a sowing method suitable for heavy clay soil operations in the present invention, the sowing device also includes a seed furrow position adjustment component, which includes a seed furrow position adjustment driver fixedly connected to the sowing machine frame and a plurality of seed furrow position adjustment blocks corresponding to the furrowing rings one by one, the seed furrow position adjustment driver is located between the rear side of the furrowing ring and the fertilizer discharge pipe, and the left and right ends of the seed furrow position adjustment block are respectively fixed with limit plates, the furrowing ring is limited between the corresponding two limit plates, and the furrowing rotates around the lower edge of the seed furrow position adjustment block. A seed groove position adjustment driving rod is connected to the actuator, and one end of the seed groove position adjustment driving rod away from the seed groove position adjustment driver is hinged to one end of the first scissors structure, one end of the first scissors structure and the rightmost seed groove position adjustment block away from the end of the corresponding groove opening ring are hinged, and the other end of the first scissors structure and the leftmost seed groove position adjustment block away from the end of the corresponding groove opening ring are hinged. When the seed groove position adjustment driving rod moves, under the action of the first scissors structure, the distance between each seed groove position adjustment block becomes larger or smaller. After the adjustment is completed, the distance between each two adjacent seed groove position adjustment blocks is the same.

[0010] As a preferred solution of a sowing method suitable for heavy clay soil operations in the present invention, a seeding connecting plate is fixed to the rear side of the seed furrow position adjustment block, and the rear side of the seeding connecting plate is slidably connected to the seeding machine frame, and a connecting hole is opened on the seeding connecting plate for allowing the seeding tube to pass downward, and the lower end of the seeding tube passes through the connecting hole and extends downward out of the seeding connecting plate.

[0011] As a preferred scheme of a sowing method suitable for heavy clay soil operations in the present invention, the rotary tillage and fertilization composite operation device includes a composite operation frame, the left and right sides of the rear end of the composite operation frame are respectively fixedly connected with front uprights, the left and right sides of the front end of the sowing frame are respectively fixedly connected with rear uprights, the rear end of the front uprights is hinged with a lifting drive, the lifting drive is connected with a lifting rod that extends backward and can perform reciprocating linear motion, two swing rods that are spaced apart and parallel to each other in the height direction are hinged between the front uprights and the rear uprights, and the rear end of the lifting rod is hinged to the upper end of the upper swing rod.

[0012] As a preferred solution of a sowing method suitable for heavy clay soil operation in the present invention, the specific steps of first adjusting the distance between adjacent furrowing rings according to the sowing row spacing requirements are as follows:

[0013] If the sowing row spacing needs to be shortened, the seed furrow position adjustment driver is controlled to move so that the seed furrow position adjustment driving rod is retracted. When the distance between two adjacent seed furrow position adjustment blocks is adjusted to the required spacing, the seed furrow position adjustment driver stops moving.

[0014] If the sowing row spacing needs to be increased, the seed furrow position adjustment driver is controlled to move in the reverse direction so that the seed furrow position adjustment drive rod extends to the right. When the distance between two adjacent seed furrow position adjustment blocks is adjusted to the required spacing, the seed furrow position adjustment driver stops.

[0015] As a preferred solution of a sowing method suitable for heavy clay soil operation in the present invention, the step of lowering the sowing device is specifically as follows:

[0016] The two lifting drives are controlled to move, the lifting rods are continuously extended backwards, the lifting rods press down the swing rods, and the swing rods drive the seed drill frame to descend. When the pressing wheel contacts the field, the lifting drive stops.

[0017] As a preferred scheme of a sowing method suitable for heavy clay soil operations in the present invention, the rotary tillage and fertilization composite operation device also includes a rotary tillage component, and the rotary tillage component includes a rotary tillage blade shaft rotatably connected to the front end of the composite operation frame, and a plurality of rotary tillage blades are arranged on the rotary tillage blade shaft.

[0018] As a preferred solution of a sowing method suitable for heavy soil operation in the present invention, the rotary tillage and fertilization composite operation device also includes a mixed fertilizer and fertilization component, the mixed fertilizer and fertilization component includes a mixed fertilizer and soil discharge shell with an upward opening behind the rotary tillage blade shaft and fixedly connected to the composite operation frame, a plurality of soil crushing fixed knives are arranged on the mixed fertilizer and soil discharge shell on the lower side of the opening, and a soil crushing spacing is provided between two adjacent soil crushing fixed knives in the axial direction, a horizontally arranged transmission shaft is rotatably connected to the mixed fertilizer and soil discharge shell, the left and right ends of the transmission shaft are connected to rotating plates, and at least one connecting shaft is fixedly connected between the two rotating plates, a plurality of soil crushing movable knives corresponding to the soil crushing spacing are arranged on the connecting shaft, and the soil crushing movable knives can just be inserted into the corresponding soil crushing spacing, a fertilization box is fixedly connected to the upper end of the composite operation frame, a plurality of fertilizer discharge pipes corresponding to the seed discharge pipes are arranged on the lower side of the fertilization box, the fertilizer discharge pipes and the corresponding seed discharge pipes are staggered in the left and right directions, and the lower ends of the fertilizer discharge pipes extend into the mixed fertilizer and soil discharge shell.

[0019] As a preferred solution of a sowing method suitable for heavy clay soil operations in the present invention, the fertilizer mixing and fertilizing assembly also includes a plurality of fertilizer mixing units corresponding to the fertilizer discharge pipes one by one, the fertilizer mixing unit includes a fertilizer mixing slider slidably connected to the upper side of the rear end of the fertilizer mixing and soil discharge shell and a fertilizer position adjustment driver fixedly connected to the upper side of the rear end of the fertilizer mixing and soil discharge shell and the composite operation machine frame, a movable groove is provided on the fertilizer mixing and soil discharge shell behind the opening, and connecting plates are fixedly connected to the left and right sides of one end of the fertilizer mixing slider extending into the movable groove, respectively, and a plug-in sinking groove is provided on the downward side of the connecting plate, and a fertilizer mixing baffle plate sleeved on the transmission shaft is just plugged into the connecting groove through the plug-in sinking groove, and the fertilizer mixing baffle plate is rotatably connected to the connecting plate, and the fertilizer mixing baffle plate has a soil crushing knife and a connecting knife. The fertilization position adjustment driver is connected with a fertilization position adjustment driving rod which extends to the right and can make reciprocating linear motion in the left and right directions. The right end of the fertilization position adjustment driving rod is hinged to one end of the second scissors-fork structure, one end of the second scissors-fork structure is hinged to the rightmost fertilizer mixing slider, and the other end of the second scissors-fork structure is hinged to the leftmost fertilizer mixing slider. When the fertilizer discharge position adjustment driving rod moves, under the action of the second scissors-fork structure, the distance between each fertilizer mixing slider becomes larger or smaller. After the adjustment is completed, the distance between each adjacent two fertilizer mixing sliders is the same. A fertilizer mixing and fertilizing area is formed between one side of two fertilizer mixing baffles in a group of fertilizer mixing units and a fertilizer mixing soil discharge shell, and the lower end of the fertilizer discharge pipe extends downward into the corresponding fertilizer mixing and fertilizing area.

[0020] As a preferred solution of a sowing method suitable for heavy clay soil operation in the present invention, the step of adjusting the position of the mixed fertilizer application area in the left and right directions according to the sowing row spacing is specifically as follows:

[0021] If the sowing row spacing needs to be shortened, the fertilizer position adjustment driver is controlled to move so that the fertilizer position adjustment driving rod is retracted. When the distance between two adjacent groups of fertilizer mixing units is adjusted to the required spacing, the fertilizer position adjustment driver stops moving;

[0022] If the sowing row spacing needs to be increased, the fertilizer position adjustment driver is controlled to move in the reverse direction so that the fertilizer position adjustment drive rod extends to the right. When the distance between two adjacent groups of fertilizer mixing units is adjusted to the required spacing, the fertilizer position adjustment driver stops moving.

[0023] Compared with the prior art, the present invention has the following technical effects: first, the soil is rotary tilled, the soil blocks after rotary tillage are crushed, and the fine soil and fertilizer formed after the crushing are mixed in the mixed fertilizer application area, the mixed fine soil and fertilizer are mixed fertilizer, and the mixed fertilizer is applied to the field in strips, and the seed ditch ring is arranged on one side of the mixed fertilizer application area in the left and right directions, and the pressing wheel presses on the fine soil to provide a flat ditching plane for the seed ditch ring, the seed ditch ring stabilizes the seed ditch, and the seeds are discharged into the seed ditch, and the crushed fine soil is applied in strips on the other side of the mixed fertilizer application area in the left and right directions, which is more conducive to pressing, and sowing is carried out next to the mixed fertilizer, and the fertilizer nutrients slowly release nutrients to the seeds through the soil, which is more conducive to the growth of the seeds; in addition, before sowing, the positions of the sowing and mixed fertilizer application areas can be adjusted according to the sowing row spacing, so as to ensure the consistency of the sowing process when adjusting the sowing row spacing, and the adaptability is wider, and can be applied to the sowing operations of different crops, especially suitable for sowing operations in heavy clay soils. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural diagram of the rotary tillage and fertilization composite operation device and the sowing device in the present invention connected together.

[0025] Figure 2 for Figure 2 A partial enlarged view of point A in the middle.

[0026] Figure 3 It is a three-dimensional structural diagram when the lifting assembly is connected to the seeding device.

[0027] Figure 4 for Figure 3 A partial enlarged view of point B in the middle.

[0028] Figure 5 for Figure 3 A partial enlarged view of point C in the middle.

[0029] Figure 6 It is a three-dimensional structural diagram of the rotary tillage and fertilization composite operation device and the sowing device in the present invention connected together.

[0030] Figure 7 for Figure 6 A partial enlarged view of point D in the middle.

[0031] Figure 8 The three-dimensional structure of the fertilizer mixing and fertilizing component in the present invention Figure 1 .

[0032] Fig. 9 for Figure 8 A partial enlarged view of point E in the middle.

[0033] Fig.10 for Figure 8 A partial enlarged view of point F in the middle.

[0034] Fig.11 The three-dimensional structure of the fertilizer mixing and fertilizing component in the present invention Figure 2 .

[0035] Fig.12 for Fig.11 A partial enlarged view of point G in the middle.

[0036] Fig.13 It is a schematic diagram of the sowing principle of the present invention.

[0037] Fig.14 It is a three-dimensional structural diagram of the seeding device in the present invention.

[0038] Fig.15 for Fig.14 A partial enlarged view of point H in the middle.

[0039] In the figure: 100 rotary tillage and fertilization composite operation device, 101 fertilizer discharger, 102 fertilizer discharge pipe, 103 first transmission box, 104 rotary tillage assembly, 104a rotary tillage blade, 104a rotary tillage blade shaft, 105 first side transmission box, 106 fertilizer box, 107 composite operation frame, 108 second intermediate shaft, 109 second side transmission box, 110 first intermediate shaft, 111 fertilizer mixing and fertilization assembly, 111a fertilizer mixing and soil discharge shell, 111a-1 opening, 111b fertilizer mixing unit, 111b-1 fertilizer mixing baffle, 111b-2 fertilizer mixing slider, 111b -3 connecting plate, 111c transmission shaft, 111d soil crushing fixed knife, 111e rotating plate, 111f connecting shaft, 111g soil crushing moving knife, 111h second left connecting rod, 111i second connecting unit, 111i-1 first front swing rod, 111i-2 second front swing rod, 111j fertilizer position adjustment driver, 111k fertilizer position adjustment driving rod, 111l second right connecting rod, 111m front hinged column, 200 sowing device, 201 sowing box, 202 sowing machine frame, 203 seeding device, 204 seeding tube, 205 seed furrow position adjustment component, 205a seed furrow position 205a-1 limit plate, 205b first left connecting rod, 205c first connecting unit, 205c-1 first rear swing rod, 205c-2 second rear swing rod, 205d first right connecting rod, 205e seed ditch position adjustment driver, 205f rear hinged column, 205g seed ditch position adjustment drive rod, 206 ditching ring, 207 guide rod, 300 lifting assembly, 301 rear upright rod, 302 lifting rod, 303 swing rod, 304 lifting driver, 305 front upright rod, X ditch clearance, S mixed fertilizer application area, M soil crushing spacing, N fertilizer and soil discharge port, J guide hole. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0041] Example 1

[0042] Reference Figure 1 to Figure 5 , which is the first embodiment of the present invention, provides a sowing method suitable for heavy clay soil operations, which can adjust the seed placement position according to the sowing row spacing requirements of the crop. The sowing process can be applied to different types of crops and has a wider range of applications.

[0043] A sowing method suitable for heavy clay soil operation, wherein a sowing device 200 used for sowing comprises a sowing machine frame 202, a sowing box 201 is fixedly connected to the sowing machine frame 202, a pressing wheel is rotatably connected to the lower part of the front end of the sowing machine frame 202, two groups of furrowing assemblies are arranged on the pressing wheel, a furrowing gap X is provided between the two groups of furrowing assemblies, the two groups of furrowing assemblies comprise a plurality of furrowing rings 206 connected to the outer periphery of the pressing wheel, a plurality of seeding devices 203 corresponding to the furrowing rings 206 are arranged on the lower side of the sowing box 201 on the left and right sides of the furrowing gap X, respectively, the seeding device 203 is preferably an electric seeding device 203, which is a prior art, and only a schematic diagram thereof is given in this application; the axial position of the furrowing ring 206 is adjustable, a soft seeding tube 204 is fixedly connected to the lower side of the seeding device 203, and the axial position of the lower part of the seeding tube 204 corresponds to the position of the furrowing ring 206; the sowing device 200 is connected to the rear of the walking device; and the following steps are included:

[0044] S1 first adjusts the distance between adjacent furrowing rings 206 according to the sowing row spacing requirement;

[0045] S2 The walking device moves to the initial working position of the field, and the sowing device 200 is lowered;

[0046] S3 The seed metering device 203 is in operation, and the seeds discharged downward by the seed metering device 203 and discharged by the seed metering tube 204 fall onto the field.

[0047] Specifically, the sowing device 200 also includes a seed groove position adjustment component 205, which includes a seed groove position adjustment driver 205e fixedly connected to the sowing machine frame 202 and a plurality of seed groove position adjustment blocks 205a corresponding to the furrowing ring 206 one by one, the seed groove position adjustment driver 205e is located between the rear side of the furrowing ring 206 and the fertilizer discharge pipe 102, and the left and right ends of the seed groove position adjustment block 205a are respectively fixed with limit plates 205a-1, the furrowing ring 206 is limited between the corresponding two limit plates 205a-1, and the furrowing ring 206 rotates around the lower edge of the seed groove position adjustment block 205a, and the seed groove position adjustment driver 205e is connected to a seed groove position adjustment driving rod 205g, and the end of the seed groove position adjustment driving rod 205g away from the seed groove position adjustment driver 205e is hinged to one end of the first scissors-fork structure, and one end of the first scissors-fork structure and the rightmost seed groove position adjustment driver 205e are connected to the seed groove position adjustment driver 205e. The groove position adjustment block 205a is hinged at one end away from the corresponding groove opening ring 206, and the other end of the first scissors structure and the leftmost seed groove position adjustment block 205a are hinged at one end away from the corresponding groove opening ring 206. The rear end of the seed groove position adjustment block 205a is slidably connected to the seed drill frame 202. When the seed groove position adjustment driving rod 205g moves, under the action of the first scissors structure, the distance between each seed groove position adjustment block 205a becomes larger or smaller. After the adjustment is completed, the distance between each adjacent seed groove position adjustment block 205a is the same; a seed discharge connecting plate 111b-3 is fixed to the rear side of the seed discharge position adjustment block 205a, and the rear side of the seed discharge connecting plate 111b-3 is slidably connected to the seed drill frame 202. A connecting hole is opened on the seed discharge connecting plate 111b-3 for the seed discharge pipe 204 to pass downward, and the lower end of the seed discharge pipe 204 passes through the connecting hole and extends downward out of the seed discharge connecting plate 111b-3.

[0048] The specific steps of adjusting the distance between adjacent furrowing rings 206 according to the sowing row spacing requirements are as follows:

[0049] If the sowing row spacing needs to be reduced, the seed furrow position adjustment driver 205e is controlled to operate, so that the seed furrow position adjustment driving rod 205g is retracted, and when the distance between two adjacent seed furrow position adjustment blocks 205a is adjusted to the required spacing, the seed furrow position adjustment driver 205e stops operating;

[0050] If the sowing row spacing needs to be increased, the seed furrow position adjustment driver 205e is controlled to move in the reverse direction, so that the seed furrow position adjustment driving rod 205g extends to the right. When the distance between two adjacent seed furrow position adjustment blocks 205a is adjusted to the required spacing, the seed furrow position adjustment driver 205e stops moving.

[0051] For the convenience of description, the seed groove position adjustment block 205a at the far left is named the left position adjustment block, and the seed groove position adjustment block 205a at the far right is named the right position adjustment block. The first scissors structure includes a plurality of first connecting units 205c, and the first connecting unit 205c includes a first rear swing rod 205c-1 and a second rear swing rod 205c-2 with the same structure that are centrally cross-arranged and hinged together. Two first left connecting rods 205b that are cross-arranged and hinged together are hinged on the left position adjustment block, and two first right connecting rods 205d that are cross-arranged and hinged together are hinged on the right position adjustment block. The first left connecting rod 205b and the first right connecting rod 205d have the same structure. The right end of the first left connecting rod 205b is hinged to one end of the leftmost first connecting unit 205c, and the two leftmost first left connecting rods 205b are respectively hinged to the leftmost first rear swing rod 205c. One end of the first rear swing rod 205c-1 and one end of the second rear swing rod 205c-2 are hinged, the other end of the first rear swing rod 205c-1 at the leftmost end is hinged to one end of the second rear swing rod 205c-2 behind, the other end of the second rear swing rod 205c-2 at the leftmost end is hinged to the other end of the first rear swing rod 205c-1 behind, the right end of the first rear swing rod 205c-1 at the rightmost end and the right end of the second rear swing rod 205c-2 at the rightmost end are hinged to two first right connecting rods 205d respectively, each connecting rod and the first swing rod 303 and the second swing rod 303 are in a parallelogram structure, and the length of the first rear swing rod 205c-1 is twice the length of each connecting rod; a rear hinge column 205f is fixed to the lower side of the groove position adjustment driver 205e, and the rear hinge column 205f is hinged to the center of the first rear swing rod 205c-1 in a group of connecting units at the groove gap X position.

[0052] When the seed groove position adjustment driving rod 205g extends to the right, the seed groove position adjustment driving rod 205g pushes the right position adjustment block to move right, driving the first right connecting rod 205d and the second right connecting rod 111l to swing towards each other, and the first right connecting rod 205d and the second right connecting rod 111l respectively pull the first right swing rod 303 and the second right swing rod 303 to move right, and the spacing between the seed groove rings is enlarged. When the distance between two adjacent seed groove rings is adjusted to the required sowing row spacing, the seed groove position adjustment driver 205e stops moving; on the contrary, when the seed groove position adjustment driving rod 205g retracts to the left, the distance between two adjacent seed groove rings is shortened, and the action process is no longer repeated.

[0053] Example 2

[0054] Reference Figure 1 and Fig.13 , which is the second embodiment of the present invention, provides a sowing method suitable for heavy clay soil operations, which can further realize the lifting and lowering of the sowing device 200.

[0055] Specifically, a rotary tillage and fertilization composite working device 100 is arranged in front of the sowing device 200, and the rotary tillage and fertilization composite working device 100 includes a composite working frame 107, and a lifting assembly 300 is connected between the composite working frame 107 and the sowing frame 202. The lifting assembly 300 includes a front upright rod 305 fixedly connected to the left and right sides of the rear end of the composite working frame 107, and the left and right sides of the front end of the sowing frame 202 are respectively fixedly connected to the rear end of the front upright rod 301, and the rear end of the front upright rod 305 is hinged with a lifting driver 304, and the lifting driver 304 is connected with a lifting rod 302 that extends backward and can perform reciprocating linear motion. Two swing rods 303 that are spaced apart and parallel to each other in the height direction are hinged between the front upright rod 305 and the rear upright rod 301, and the rear end of the lifting rod 302 is hinged to the upper end of the swing rod 303 above.

[0056] Step S2 also includes the following steps: lowering the rotary tillage and fertilization composite operation device 100, the rotary tillage and fertilization composite operation device 100 is provided with a plurality of position-adjustable mixed fertilizer application areas S, lowering the sowing device 200, adjusting the position of the mixed fertilizer application area S in the left-right direction according to the sowing row spacing, after the adjustment is completed, using the rotary tillage and fertilization composite operation device 100 to rotary till the field, throwing the soil blocks after rotary tillage backwards to crush them, and mixing the soil blocks in the mixed fertilizer application area S with the fertilizer after crushing, and discharging the mixed fine soil and the fertilizer together onto the field to realize strip application of mixed fertilizer, and discharging the crushed fine soil onto the field between adjacent mixed fertilizer application areas S. When viewed from the left-right direction, the mixed fertilizer is between the strip-applied seeds and the strip-applied fine soil (such as Fig.13 as shown).

[0057] The composite operating frame 107 is connected to the rear of the traveling device in a liftable manner (which is prior art and not shown).

[0058] The specific steps of lowering the sowing device 200 are:

[0059] The two lifting drivers 304 are controlled to move, the lifting rod 302 is continuously extended backward, the lifting rod 302 presses down the swing rod 303, and the swing rod 303 drives the seed drill frame 202 to descend. When the pressing wheel contacts the field, the lifting driver 304 stops moving.

[0060] Before sowing, the sowing device 200 needs to be lifted off the ground. The specific steps are as follows:

[0061] The two lifting drivers 304 are controlled to move, the lifting rod 302 retracts forward, the lifting rod 302 pulls the swing rod 303 to swing upward, and the swing rod 303 drives the seed drill frame 202 to rise. When the seed furrow ring leaves the field to a suitable height, the lifting driver 304 stops moving.

[0062] Example 3

[0063] Reference Figure 6 to Figure 8, which is the third embodiment of the present invention, provides a sowing method suitable for heavy clay soil operations, which can apply mixed fertilizer next to the seeds, helping to improve the quality of seedlings.

[0064] Specifically, the rotary tillage and fertilization composite operation device 100 also includes a rotary tillage assembly 104, which includes a rotary tillage blade shaft 104b rotatably connected to the front end of a composite operation frame 107, on which a plurality of rotary tillage blades 104a are arranged, and a fertilizer mixing and fertilization assembly 111 is provided on the composite operation frame 107 behind the rotary tillage blades 104a, and the fertilizer mixing and fertilization assembly 111 includes a fertilizer mixing and soil discharge housing 111a fixedly connected to the composite operation frame 107 and having an upward opening 111a-1, A fertilizer and soil discharge port N is provided at the lower part of the rear end of the fertilizer mixing and soil discharge housing 111a, and a plurality of soil crushing fixed knives 111d are arranged on the fertilizer mixing and soil discharge housing 111a at the lower side of the opening 111a-1. A soil crushing spacing M is provided between two adjacent soil crushing fixed knives 111d in the axial direction. A horizontally arranged transmission shaft 111c is rotatably connected to the fertilizer mixing and soil discharge housing 111a, and rotating plates 111e are connected to the left and right ends of the transmission shaft 111c. At least one connecting shaft 111f is also fixedly connected between the two rotating plates 111e. In this embodiment, two connecting shafts 111f symmetrically arranged about the center of the rotating plate 111e are fixedly connected between the two rotating plates 111e, and a plurality of soil-crushing moving knives 111g corresponding to the soil-crushing spacing M are arranged on the connecting shaft 111f, and the soil-crushing moving knives 111g can just be inserted into the corresponding soil-crushing spacing M. A fertilizer box 106 is fixedly connected to the upper end of the composite operation frame 107, and a plurality of fertilizer dispensers 101 corresponding to the seed dispenser 203 are arranged on the lower side of the fertilizer box 106. The fertilizer dispenser 101 is preferably The electric fertilizer dispenser 101 is a prior art, and only a schematic diagram is given in this application. A soft fertilizer pipe 102 is fixedly connected to the lower side of the fertilizer dispenser 101. The fertilizer pipe 102 is located in front of the mixed soil discharge shell. The fertilizer pipe 102 and the corresponding seed discharge pipe 204 are staggered in the left and right directions, and the lower end of the fertilizer pipe 102 extends into the mixed fertilizer and soil discharge shell 111a; the rear end of the composite working frame 107 is fixedly connected to a ditch trimmer, and the position of the ditch trimmer gap X in the left and right directions covers the area of ​​the ditch trimmer in the left and right directions.

[0065] During operation, the rotary tiller shaft 104b rotates, and the rotary tiller shaft 104b drives the rotary tiller 104a to rotate, and the rotary tiller 104a tills the field, and the rotary tiller 104a throws the soil backward, and the thrown soil blocks fall into the fertilizer mixing and soil discharge shell 111a through the opening 111a-1, and the rotating plate 111e rotates, and the rotating plate 111e drives the two connecting shafts 111f to rotate, and the connecting shaft 111f drives the soil crushing movable knife 111g to rotate, and the soil crushing movable knife 111g and the soil crushing fixed knife 111d crush the soil blocks, and the fertilizer discharger 101 is activated, and the discharged fertilizer falls into the fertilizer mixing and soil discharge shell 111a, and the fertilizer and fine soil are mixed together, and the mixed fertilizer and fine soil are discharged backward to the field through the fertilizer and soil discharge port N.

[0066] The structure for realizing the rotation of the rotary cutter shaft and the transmission shaft 111c is as follows: the center of the upper end of the composite operating frame 107 is fixedly connected to the first transmission box 103, the right end of the first transmission box 103 is connected to the first intermediate shaft 110, the composite operating frame 107 on the right side of the first transmission box 103 is fixedly connected to the second transmission box, the right side of the composite operating frame 107 is fixedly connected to the first side transmission box 105 and the second side transmission box 109 arranged at intervals in the front-to-back direction, the first intermediate shaft 110 on the right provides power to the second transmission box and the first side transmission box 105, the output end of the second transmission box is connected to the second intermediate shaft 108, and the second intermediate shaft 108 provides power to the second side transmission box 10 9 provides power, the lower end of the first side transmission box 105 is connected with a first power output shaft, the first power output shaft is connected to the rotary blade shaft 104b, the lower end of the second side transmission box 109 is connected with a second power output shaft, the power output shaft is connected to the transmission shaft 111c, the front walking device transmits power to the intermediate transmission box, the first intermediate shaft 110 rotates, the first intermediate shaft 110 transmits power to the first side transmission box 105, the rotary blade shaft 104b rotates, and at the same time, the first intermediate shaft 110 transmits power to the second side transmission box 109 via the second transmission box. Each transmission box is prior art, which is not the invention point of the present application, and there is no need to elaborate on the specific transmission structure in the box.

[0067] Example 4

[0068] Reference Figure 6 to Figure 12 , which is the fourth embodiment of the present invention, and this embodiment provides a sowing method suitable for heavy clay soil operations, which can adjust the position of the fertilizer mixing unit 111b according to the planting row spacing requirements, so that the mixed fertilizer can always be applied in the field beside the seed furrow.

[0069] Specifically, the fertilizer mixing and fertilizing assembly 111 also includes a plurality of fertilizer mixing units 111b corresponding to the fertilizer discharge pipes 102 one by one, and the fertilizer mixing unit 111b includes a fertilizer mixing slider 111b-2 slidably connected to the upper side of the rear end of the fertilizer mixing and soil discharge housing 111a and a fertilizer position adjustment driver fixedly connected to the upper side of the rear part of the fertilizer mixing and soil discharge housing 111a and the composite operation frame 107. A movable groove is opened on the fertilizer mixing and soil discharge housing 111a behind the opening 111a-1. The fertilizer mixing slider 111b-2 extends into the moving groove, and the left and right sides of one end are respectively fixedly connected with a connecting plate 111b-3, and the connecting plate 111b-3 has a plug-in sinking groove on the downward side. The connecting plate 111b-3 is just plugged with a fertilizer mixing baffle 111b-1 sleeved on the transmission shaft 111c through the plug-in sinking groove. The fertilizer mixing baffle 111b-1 is rotatably connected to the connecting plate 111b-3, and the fertilizer mixing baffle 111b-1 has a soil crushing knife. 111g and the connecting shaft 111f pass through the through groove, the fertilization position adjustment driver is connected with a fertilization position adjustment driving rod extending to the right and capable of reciprocating linear motion in the left and right directions, the right end of the fertilization position adjustment driving rod is hinged to one end of the second scissors-fork structure, one end of the second scissors-fork structure is hinged to the rightmost fertilizer mixing slider 111b-2, and the other end of the second scissors-fork structure is hinged to the leftmost fertilizer mixing slider 111b-2. When the fertilizer discharge position adjustment driving rod 111k moves, under the action of the second scissors-fork structure, the distance between each fertilizer mixing slider 111b-2 becomes larger or smaller. After the adjustment is completed, the distance between each adjacent two fertilizer mixing sliders 111b-2 is the same, and a fertilizer mixing and fertilizing area S is formed between the oppositely arranged sides of the two fertilizer mixing baffles 111b-1 in a group of fertilizer mixing units 111b and the fertilizer mixing soil discharge shell 111a, and the lower end of the fertilizer discharge pipe 102 extends downward into the corresponding fertilizer mixing and fertilizing area S.

[0070] The steps of adjusting the position of the mixed fertilizer application area S in the left and right directions according to the sowing row spacing are specifically as follows:

[0071] If the sowing row spacing needs to be reduced, the fertilizer position adjustment driver 111j is controlled to operate, so that the fertilizer position adjustment driving rod 111k is retracted. When the distance between two adjacent groups of fertilizer mixing units 111b is adjusted to the required spacing, the fertilizer position adjustment driver 111j stops operating;

[0072] If the sowing row spacing needs to be increased, the fertilizer position adjustment driver 111j is controlled to move in the opposite direction, so that the fertilizer position adjustment driving rod 111k extends to the right. When the distance between two adjacent groups of fertilizer mixing units 111b is adjusted to the required spacing, the fertilizer position adjustment driver 111j stops moving.

[0073] For the convenience of description, the fertilizer mixing slider 111b-2 at the far left is named the left slider, and the fertilizer mixing slider 111b-2 at the far right is named the right slider. The first scissor structure includes a plurality of second connecting units 111i corresponding to the right slider one by one. The second connecting unit 111i includes a first front swing rod 111i-1 and a second front swing rod 111i-2 with the same structure. The centers of the first front swing rod 111i-1 and the second front swing rod 111i-2 are cross-arranged and hinged together. The fertilizer mixing slider 111b-2 is hinged at the center of the corresponding first front swing rod 111i-1 and the second front swing rod 111i-2. Two second left connecting rods 111h that are cross-arranged and hinged together are hinged on the left slider, and two second right connecting rods 111l that are cross-arranged and hinged together are hinged on the right slider. The second left connecting rod 111h and the second right connecting rod 111l have the same structure. The right end of the second left connecting rod 111h is hinged to one end of the second connecting unit 111i at the far left. The two The second left connecting rod 111h at the leftmost end is respectively hinged to one end of the first front swing rod 111i-1 at the leftmost end and one end of the second front swing rod 111i-2 at the rear; the other end of the first front swing rod 111i-1 at the leftmost end is hinged to one end of the second front swing rod 111i-2 at the rear; the other end of the second front swing rod 111i-2 at the leftmost end is hinged to the other end of the first front swing rod 111i-1 at the rear; the right end of the first front swing rod 111i-1 at the rightmost end is hinged to the second front swing rod 111i-2 at the rightmost end. The right ends of 1i-2 are hinged to the two second right connecting rods 111l respectively, and each connecting rod and the corresponding first front swing rod 111i-1 and second front swing rod 111i-2 are in a parallelogram structure, and the length of the first front swing rod 111i-1 is twice the length of each connecting rod; a front hinge column 111m is fixed to the lower side of the groove position adjustment driver 205e, and the front hinge column 111m is hinged to the center of the first front swing rod 111i-1 in a group of connecting units at the groove gap X position.

[0074] When the fertilizer position adjustment driving rod 111k extends to the right, the fertilizer position adjustment driving rod 111k pushes the right slider to move right, driving the second right connecting rod 111l and the second right connecting rod 111l to swing towards each other, and the second right connecting rod 111l and the second right connecting rod 111l respectively pull the first right swing rod 303 and the second right swing rod 303 to move right, and the distance between the mixed fertilizer application areas S is enlarged. When the mixed fertilizer slider 111b-2 moves, it drives the two connecting plates 111b-3 to move together, and the connecting plate 111b-3 drives the mixed fertilizer baffle 111 1b-1 slides along the transmission shaft 111c, that is, the mixed fertilizer and fertilization area S moves synchronously. When the connecting plate 111b-3 contacts the fertilizer discharge pipe 102, the connecting plate 111b-3 drives the fertilizer discharge pipe 102 to move, that is, the fertilizer discharge pipe 102 is always in the corresponding mixed fertilizer and fertilization area S. When the distance between two adjacent mixed fertilizer and fertilization areas S is adjusted to adapt to the required sowing row spacing, the fertilizer discharge position adjustment driver 111j stops moving; on the contrary, when the fertilizer discharge position adjustment drive rod 111k retracts to the left, the distance between two adjacent mixed fertilizer and fertilization areas S is shortened, and the action process is no longer repeated.

[0075] In the present application, each driver is a prior art, and each driver is preferably a hydraulic cylinder.

[0076] The directions mentioned in this application are: the forward direction of the rotary tillage and fertilization composite operation device 100 is the front, the reverse direction is the rear, the horizontal direction perpendicular to the front-back direction is the left-right direction, and the left-right direction is parallel to the axial direction of the transmission shaft.

[0077] Example 5

[0078] Reference Fig.14 and Fig.15 , which is the fifth embodiment of the present invention. The difference between this embodiment and the previous four embodiments is that this embodiment can further improve the stability of the seed groove position adjustment block 205a during position adjustment.

[0079] Specifically, the seed furrow position adjustment block 205a and the limit plate 205a - 1 are both provided with coaxial guide holes J, a guide rod 207 coaxial with the guide hole J is fixedly connected to the seed drill frame 202 , and the seed furrow position adjustment block 205a is slidably connected to the guide rod 207 .

[0080] When adjusting the sowing row spacing, the seed furrow position adjusting block 205a slides along the guide rod 207, thereby improving the reliability of the horizontal movement of the seed furrow position adjusting block 205a.

[0081] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A sowing method suitable for heavy clay soil operations, wherein the sowing device (200) used for sowing comprises a sowing machine frame (202) and a seed furrow position adjustment component (205), wherein a sowing box (201) is fixedly connected to the sowing machine frame (202), and a pressure wheel is rotatably connected to the lower part of the front end of the sowing machine frame (202), and two groups of furrowing components are arranged on the pressure wheel, and a furrowing gap (X) is provided between the two groups of furrowing components, and the two groups of furrowing components include a plurality of furrowing rings (206) connected to the outer periphery of the pressure wheel, and a plurality of seeding devices (203) corresponding to the furrowing rings (206) are arranged on the lower side of the sowing box (201) on the left and right sides of the furrowing gap (X); the characteristics are as follows: The axial position of the furrowing ring (206) is adjustable. A soft seeding tube (204) is fixedly connected to the lower side of the seeding device (203). The axial position of the lower part of the seeding tube (204) corresponds to the position of the furrowing ring (206). The seed furrow position adjustment component (205) comprises a seed furrow position adjustment driver (205e) fixedly connected to the seeding machine frame (202) and a plurality of seed furrow position adjustment blocks (205a) corresponding to the furrowing ring (206) one by one. The seed furrow position adjustment driver (205e) is located between the rear side of the furrowing ring (206) and the fertilizer discharging tube (102). The left and right ends of the seed furrow position adjustment block (205a) are respectively fixed with limit plates (205a-1). The furrowing ring (206) is limited between the corresponding two limit plates (205a-1). The furrowing ring (206) is adjusted around the seed furrow position adjustment driver (205e). The lower edge of the block (205a) rotates, and a seed groove position adjustment driving rod (205g) is connected to the seed groove position adjustment driving driver (205e), and one end of the seed groove position adjustment driving rod (205g) away from the seed groove position adjustment driver (205e) is hinged to one end of the first scissors structure, and one end of the first scissors structure is hinged to one end of the seed groove position adjustment block (205a) at the rightmost end away from the corresponding furrowing ring (206), and the other end of the first scissors structure is hinged to one end of the seed groove position adjustment block (205a) at the leftmost end away from the corresponding furrowing ring (206). When the seed groove position adjustment driving rod (205g) moves, under the action of the first scissors structure, the distance between each seed groove position adjustment block (205a) increases or decreases. After the adjustment is completed, the distance between each two adjacent seed groove position adjustment blocks (205a) is the same; The following steps are included: First, the distance between adjacent furrowing rings (206) is adjusted according to the sowing row spacing requirement; The walking device walks to the initial operation position of the field, and the rotary tillage and fertilization composite operation device (100) is lowered. The rotary tillage and fertilization composite operation device (100) is provided with a plurality of position-adjustable mixed fertilizer application areas (S). The sowing device (200) is lowered, and the position of the mixed fertilizer application area (S) in the left and right directions is adjusted according to the sowing row spacing. After the adjustment is completed, the rotary tillage and fertilization composite operation device (100) is used to rotary till the field, and the soil blocks after rotary tillage are thrown backwards to be crushed. The soil blocks in the mixed fertilizer application area (S) are crushed and mixed with fertilizer, and the mixed fine soil and fertilizer are discharged together on the field to realize strip application of mixed fertilizer, and the crushed fine soil is discharged between adjacent mixed fertilizer application areas (S) to the field; At the same time, the seed dispensing device (203) is activated, and the seeds discharged through the seed dispensing pipe (204) fall onto the field on one side of the mixed fertilizer application area (S) in the left and right directions.

2. A sowing method suitable for heavy clay soil operations as claimed in claim 1, characterized in that: A seeding connection plate (111b-3) is fixed to the rear side of the seed furrow position adjustment block (205a), and the rear side of the seeding connection plate (111b-3) is slidably connected to the seeding machine frame (202). The seeding connection plate (111b-3) is provided with a connection hole just enough for the seeding tube (204) to pass downward, and the lower end of the seeding tube (204) passes through the connection hole and extends downward out of the seeding connection plate (111b-3).

3. A sowing method suitable for heavy clay soil operations as claimed in claim 1, characterized in that: The rotary tillage and fertilization composite operation device (100) comprises a composite operation frame (107), the left and right sides of the rear end of the composite operation frame (107) are respectively fixedly connected with front uprights (305), the left and right sides of the front end of the seeding frame (202) are respectively fixedly connected with rear uprights (301), the rear end of the front uprights (305) is hinged with a lifting driver (304), the lifting driver (304) is connected with a lifting rod (302) which extends outward and can perform reciprocating linear motion, two swing rods (303) which are spaced apart and parallel to each other in the height direction are hinged between the front uprights (305) and the rear uprights (301), and the rear end of the lifting rod (302) is hinged to the upper end of the swing rod (303) above.

4. A sowing method suitable for heavy clay soil operations as claimed in claim 2, characterized in that: The specific steps of adjusting the distance between adjacent furrowing rings (206) according to the sowing row spacing requirement are as follows: If the sowing row spacing needs to be reduced, the seed furrow position adjustment driver (205e) is controlled to operate so that the seed furrow position adjustment driving rod (205g) is retracted, and when the distance between two adjacent seed furrow position adjustment blocks (205a) is adjusted to the required spacing, the seed furrow position adjustment driver (205e) stops operating; If the sowing row spacing needs to be increased, the seed furrow position adjustment driver (205e) is controlled to move in the reverse direction, so that the seed furrow position adjustment driving rod (205g) extends to the right. When the distance between two adjacent seed furrow position adjustment blocks (205a) is adjusted to the required spacing, the seed furrow position adjustment driver (205e) stops moving.

5. A sowing method suitable for heavy clay soil operations as claimed in claim 3, characterized in that: The specific steps of lowering the sowing device (200) are: The two lifting drivers (304) are controlled to move, the lifting rod (302) is continuously extended backward, the lifting rod (302) presses down the swing rod (303), and the swing rod (303) drives the seed drill frame (202) to descend. When the pressing wheel contacts the field, the lifting driver (304) stops moving.

6. A sowing method suitable for heavy clay soil operations as claimed in claim 3, characterized in that: The rotary tillage and fertilization composite operation device (100) further comprises a rotary tillage assembly (104), wherein the rotary tillage assembly (104) comprises a rotary tillage blade shaft (104b) rotatably connected to the front end of a composite operation frame (107), and a plurality of rotary tillage blades (104a) are arranged on the rotary tillage blade shaft (104b).

7. A sowing method suitable for heavy clay soil operations as claimed in claim 6, characterized in that: The rotary tillage and fertilization composite operation device (100) further comprises a fertilizer mixing and fertilization assembly (111), the fertilizer mixing and fertilization assembly (111) comprising a fertilizer mixing and soil discharge housing (111a) having an upward opening (111a-1) and fixedly connected to the composite operation frame (107) behind the rotary tillage blade shaft (104b), a plurality of soil crushing fixed knives (111d) are arranged on the fertilizer mixing and soil discharge housing (111a) below the opening (111a-1), a soil crushing distance (M) is provided between two adjacent soil crushing fixed knives (111d) in the axial direction, a horizontally arranged transmission shaft (111c) is rotatably connected to the fertilizer mixing and soil discharge housing (111a), and both left and right ends of the transmission shaft (111c) are connected to rotary tillage blade shafts (104b). A movable plate (111e) is provided between the two rotating plates (111e), and at least one connecting shaft (111f) is fixedly connected therebetween. A plurality of soil-crushing movable knives (111g) corresponding to the soil-crushing spacing (M) are arranged on the connecting shaft (111f), and the soil-crushing movable knives (111g) can just be inserted into the corresponding soil-crushing spacing (M). A fertilizer box (106) is fixedly connected to the upper end of the composite operation frame (107), and a plurality of fertilizer discharge pipes (102) corresponding to the seed discharge pipes (204) are arranged on the lower side of the fertilizer box (106). The fertilizer discharge pipes (102) and the corresponding seed discharge pipes (204) are staggered in the left-right direction, and the lower ends of the fertilizer discharge pipes (102) extend into the fertilizer mixing and soil discharge shell (111a).

8. A sowing method suitable for heavy clay soil operations as claimed in claim 7, characterized in that: The fertilizer mixing and fertilizing assembly (111) further comprises a plurality of fertilizer mixing units (111b) corresponding one to one with the fertilizer discharge pipes (102), the fertilizer mixing units (111b) comprising a fertilizer mixing slider (111b-2) slidably connected to the upper side of the rear end of the fertilizer mixing and soil discharge housing (111a) and a fertilizer application position adjustment driver fixedly connected to the upper side of the rear part of the fertilizer mixing and soil discharge housing (111a) and the composite operation frame (107), and a fertilizer mixing and soil discharge housing (111a) behind the opening (111a-1) is provided with a The movable groove, the left and right sides of one end of the fertilizer mixing slider (111b-2) extending into the movable groove are respectively fixedly connected with a seeding connection plate (111b-3), a plug-in sink groove is opened on the downward side of the seeding connection plate (111b-3), and the seeding connection plate (111b-3) is just plugged with a fertilizer mixing baffle (111b-1) sleeved on the transmission shaft (111c) through the plug-in sink groove, and the fertilizer mixing baffle (111b-1) is rotatably connected to the seeding connection plate (111b-3), and the fertilizer mixing baffle (111b-1) ) is provided with a through slot for the soil crushing moving blade (111g) and the connecting shaft (111f) to pass through, the fertilizer position adjustment driver is connected with a fertilizer position adjustment driving rod extending to the right and capable of reciprocating linear motion in the left and right directions, the right end of the fertilizer position adjustment driving rod is hinged to one end of the second scissor-fork structure, one end of the second scissor-fork structure is hinged to the rightmost fertilizer mixing slider (111b-2), the other end of the second scissor-fork structure is hinged to the leftmost fertilizer mixing slider (111b-2), and the fertilizer position adjustment When the driving rod (111k) moves, under the action of the second scissor structure, the distance between each fertilizer mixing slider (111b-2) increases or decreases. After the adjustment is completed, the distance between each two adjacent fertilizer mixing sliders (111b-2) is the same. A fertilizer mixing and fertilizing area (S) is formed between the oppositely arranged sides of the two fertilizer mixing baffles (111b-1) in a group of fertilizer mixing units (111b) and the fertilizer mixing and soil discharge shell (111a), and the lower end of the fertilizer discharge pipe (102) extends downward into the corresponding fertilizer mixing and fertilizing area (S).

9. A sowing method suitable for heavy clay soil operations as claimed in claim 8, characterized in that: The specific steps of adjusting the position of the mixed fertilizer application area (S) in the left and right directions according to the sowing row spacing are as follows: If the sowing row spacing needs to be reduced, the fertilizer discharge position adjustment driver (111j) is controlled to operate, so that the fertilizer discharge position adjustment driving rod (111k) is retracted, and when the distance between two adjacent groups of fertilizer mixing units (111b) is adjusted to the required spacing, the fertilizer discharge position adjustment driver (111j) stops operating; If the sowing row spacing needs to be increased, the fertilizer position adjustment driver (111j) is controlled to move in the reverse direction, so that the fertilizer position adjustment driving rod (111k) extends to the right. When the distance between two adjacent groups of fertilizer mixing units (111b) is adjusted to the required spacing, the fertilizer position adjustment driver (111j) stops moving.

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