CN207382921U - A kind of native pasture rejuvenation after-culture fertilizer applicator - Google Patents

Abstract

The utility model discloses a fertilizer applicator for natural pasture rejuvenation and supplementary sowing, which comprises a suspension frame, a main frame, a disc device for missing a door, a liquid fertilizer control device, a liquid fertilizer tank, a seed box, a liquid fertilizer ditch opener, a seed row opener, and a Adjustable suppression mechanism, ground wheel. During operation, the notched disc knife rolls forward while cutting the grass roots, and the liquid fertilizer ditch opener at the back opens a gap, and the liquid fertilizer delivery pipe and fertilization nozzle located behind the liquid fertilizer ditch opener spray liquid fertilizer into the ditch. Then install the seeding opener at the back to open the seeding ditch along the front liquid fertilizer opener again, and input the forage seeds through the seeding conduit; finally, the soil is compacted by the pressing wheel. The utility model sequentially ditches, fertilizes, and supplements sowing on the same straight line to realize the requirement of layered supplementation, greatly reduces the operation resistance, and is suitable for various soil types and soil hardness operations; liquid fertilization can be performed while pasture sowing can be realized. Improve fertilizer efficiency, increase soil moisture content, and increase emergence rate.

Description

A kind of fertilizer applicator for natural pasture rejuvenation

technical field

The utility model relates to the field of agricultural machinery, in particular to a natural pasture rejuvenation supplementary sowing fertilizer applicator.

Background technique

Our country has vast grasslands, but there are many grasslands and grasslands. The "three modernizations" (degradation, desertification, and alkalization) problems are serious. Long-term lack of nourishment, overloaded grazing, and trampling and grazing by livestock have caused serious soil compaction, high firmness, and hardened layers. The depth reaches 250-350mm, and the soil firmness reaches 28.7-48.7kg/cm ² , which greatly affects the production and self-breeding of forage grass. In particular, the underground transverse rhizomes of perennial rhizome-type gramineous pastures can extend up to 1-1.5m per year. The intertwined root system reduces soil air permeability, decreases water content and porosity, and increases bulk density. Although the traditional grassland improvement method has a certain effect on the ecological restoration of the grassland, it does not solve the problem fundamentally. It cannot break the compaction layer, cut off the grass and move the roots, and cannot realize the looseness of the soil, water storage and moisture conservation, and cannot satisfy the rejuvenation of the pasture. and growth promotion, as well as the needs of pasture improvement and forage production, have brought continuous pressure on the production and development of agriculture and animal husbandry. In view of the serious degradation of natural pastures in my country and the needs of pasture mechanized production, in recent years, research has been carried out to improve pasture soil by mechanical loosening of soil, breaking the compaction of the soil subsurface, reducing soil bulk density, increasing soil porosity, and enhancing soil storage. Water and aeration capacity, create soil conditions favorable for plant growth, and realize self-rejuvenation of grassland, such as root cutting, irrigation, and fertilization of degraded grassland. The results show that the combination of the three has a significant effect on increasing production.

The technical difficulties of degraded grassland loosening soil improvement are: first, how to break the high-solid compaction layer to achieve soil loosening; second, avoid grassland vegetation damage and timely re-seeding while completing soil loosening. In terms of research on mechanized technology for improving degraded pastures, foreign grassland improvement machines are mostly large-scale tillage and seeding machines. Although they have high operating efficiency, they are expensive, unsuitable for my country's national conditions, and difficult to popularize and apply. There is only research on supplementary seeding machines in China. These machines also have some loosening functions. The loosening parts used are disc cutters, chisel-shaped loosening shovels, dovetail-type loosening shovels and sliding-knife loosening shovels, and Most of the soil loosening parts and implements used in grassland improvement are farmland operating implements or slightly improved, and the effect is not significant. Especially in the case of high solidity, large soil bulk density, and high root density of surface soil, its reliability and operation effect are not ideal, and the damage rate to native vegetation is relatively high. For drought and grassland operations with thin soil layers, due to greater soil disturbance and vegetation damage, it may even aggravate the degradation of the original grassland.

Contents of the invention

The technical problem to be solved by the utility model is to provide a natural pasture rejuvenation supplementary sowing and fertilizing machine to solve the problems of cutting grass roots, loosening soil and fertilizing (or replenishing water), forage supplementary sowing and compacting operations at one time; The number of pressing grassland, device row spacing, depth and pressure on grassland can be adjusted freely within a certain range. The adjustment is simple and convenient, and the power consumption of the machine is low.

In order to solve the existing technical problems, the technical solution adopted by the utility model is: a natural grassland rejuvenation supplementary sowing fertilizer applicator, including a main frame, a gap disc device, a fertilization device, a seeding device, an adjustable suppression mechanism and a ground wheel,

The main frame is installed on the tractor through a suspension frame;

The notched disc device is installed and fixed under the front end of the main frame, and the notched disc device includes a notched disc knife, a cutter shaft and a depth adjustment oil cylinder, and the cutter shaft is installed and fixed on the front end of the main frame through a support arm, a clamp and a set bolt Below, multiple notched disc knives are installed on the cutter shaft according to the agronomic interval requirements of the pasture. One end of the depth adjustment cylinder is hinged on the rear bracket of the tractor casing, and the other end of the depth adjustment cylinder is hinged to the cutter shaft, and the gap is adjusted by adjusting the depth adjustment cylinder. The penetration depth of the disc cutter;

The fertilization device includes a liquid fertilizer control device, a liquid fertilizer tank, a liquid fertilizer ditch opener and a fertilization nozzle. The liquid fertilizer ditch opener is installed and fixed below the main frame and behind the notch disc device. Each liquid fertilizer ditch opener is connected to the front The notched disc knife corresponds to and is located on a straight line. The liquid fertilizer opener includes a fixed plate, a connecting plate, a plow column, and a plow shovel. The fixing bolts and nuts are fixed between the two fixing plates. The fixing plate is installed and fixed on the main frame through the clamp and the fixing bolts. The rear end of the plow column is welded with a fertilizer delivery pipe, and the inside of the fertilizer delivery guide is connected with a liquid fertilizer delivery pipe and fertilization pipe. The spray head and the front of the plow column are welded with an angled guard plate from top to bottom, and the plow shovel is fastened by countersunk bolts and nuts at the front end of the plow column; the liquid fertilizer tank is installed on the main frame, and the liquid fertilizer tank is connected to the main frame through the liquid fertilizer delivery pipe. The fertilization nozzle is connected; the liquid fertilizer control device is installed on the main frame, and the liquid fertilizer control device includes a diaphragm pump, a liquid fertilizer distribution valve and a flow regulating valve. The diaphragm pump is driven by a DC motor to transport the liquid fertilizer in the liquid fertilizer tank to the fertilizer through the liquid fertilizer delivery pipe. Nozzles, liquid fertilizer distribution valves and flow regulating valves are installed on the liquid fertilizer delivery pipes for liquid fertilizer distribution and flow adjustment; the fertilization nozzles are spray gun structures and are installed at the end of the liquid fertilizer delivery pipes extending into the fertilizer delivery pipes;

The sowing device includes a seed box and a seeding opener, and the seeding opener is installed and fixed under the main frame and behind the liquid fertilizer opener, and each seeding opener is ditching with the liquid fertilizer in front. The seeding opener is located on a straight line. The seeding opener includes a seeding conduit, side panels, and a ditch opener shovel. The upper end of the seeding conduit is fixed on the main frame through a clamp and a fastening bolt. At the lower end of the conduit, the opener shovel is in a triangular shape, and side panels are welded on both sides of the opener shovel; the seed box is fixed on the main frame, and an outer sheave seed metering device is installed in the seed box, and the outer sheave seed metering device The device is powered by the ground wheel and the transmission system, and the seed delivery pipe is connected to the outlet of the outer groove wheel seed meter, and the end of the seed delivery pipe is connected to the seed discharge conduit;

The adjustable suppression mechanism is installed and fixed under the main frame and behind the seed row opener. Each adjustable suppression mechanism is located in a straight line with the front row seed opener. The adjustable suppression mechanism includes a U-shaped fixed plate , baffle plate, pressure rod, pressure regulator, connecting arm a, suppressing wheel, connecting arm b, the U-shaped fixed plate is fixed on the main frame by clamps and set bolts; one end of the pressure rod The pin shaft a is hinged with the U-shaped fixed plate, and the other end is fixed with the upper end of the baffle plate through a pressure adjusting nut, and the pressure rod is covered with a pressure spring; the lower end of the baffle plate is fixed on the connecting arm b; One end of the connecting arm b is hinged at the lower end of the U-shaped fixed plate, and the other end is hinged with the connecting arm a through the pin b; The regulator is used to adjust the pressure of the pressing wheel on the seed ditch, and the slope in front of the connecting arm a is close to the positioning rod;

The ground wheel is installed under the main frame and rolls on the ground along the forward direction of the natural pasture rejuvenation supplementary fertilizer applicator. The ground wheel is connected with the outer grooved wheel seed metering device in the seed box through the transmission system, and is the The seed meter provides power.

In order to facilitate entry into the soil and reduce soil resistance without turning the soil, the cross-section of the plow column according to the present invention is an isosceles triangle, the apex angle is forward, and the apex angle α is 30° to 35°. The width of the rear part of the plow column S is 40mm to 50mm.

Generally, the pressure regulator can adopt any existing pressure regulating device suitable for the present invention to adjust the pressure of the pressing wheel to the seed ditch. In particular, the utility model invention also discloses a pressure regulator, and the pressure regulator includes Pressure adjustment handle, housing and eccentric cam, the lower end of the pressure adjustment handle passes through the housing, compression spring, gasket, eccentric cam and eccentric camshaft in turn, the pressure adjustment handle inside the housing is fixed by the compression spring and the gasket, Positioning claws are welded on both sides of the pressure adjustment handle on the outside of the shell. There are multiple rows of holes drilled on the shell. The distance between the two positioning claws is the same as that of a row of holes on the shell. The positioning claws are fixed in the row of holes; Through the eccentric camshaft, the eccentric cam is installed on the outer end of the eccentric camshaft and above the connecting arm a, and the pressure of the pressing wheel on the seed ditch is adjusted by changing the rotation angle of the pressure adjustment handle and the eccentric cam.

The working process of the utility model is a rejuvenation supplementary sowing and fertilizing machine for natural pastures: when the implement is pulled by a tractor to move forward, the notched disc knife rolls forward and cuts off the grass roots at the same time. The hydraulic cylinder of the tractor is added to force the notch disc into the soil, so its soil cutting ability is stronger than that of the traditional disc cutter. Then, the liquid fertilizer ditch opener is located behind the notched disc knife, and along the gap opened by the front notched disc knife, open a deep trench with a depth of 100mm-150mm and a width of 40mm-50mm. The deep trench section is inverted T-shaped. At the same time, the liquid fertilizer is sprayed into the ditch by the liquid fertilizer delivery pipe and the fertilization sprinkler located at the rear of the liquid fertilizer ditch opener. Then install the seeding opener at the back and open the seed ditch 30mm-50mm from the ground surface along the groove opened by the front liquid fertilizer opener again, the width of the seed ditch is 45mm-50mm, and at the same time, input the pasture seeds through the seeding conduit; Finally, the pressing wheel on the same line as the seed ditch compacts the soil, and the degree of compaction can be adjusted by the pressure regulating handle.

Beneficial effect

The utility model has the advantages of a kind of natural pasture rejuvenation and supplementary sowing fertilizer applicator: 1. First, the notch disc knife with strong soil cutting function is used to cut the soil and cut off the grass roots, and then the liquid fertilizer ditch opener and the seeding ditch opener are used successively. Digging, fertilizing, and re-seeding on the same straight line can meet the requirements of layered re-seeding, greatly reduce the resistance of the operation, and are suitable for various soil types and soil hardness operations; Fertilizer effect, increased soil moisture content, increased emergence rate. 3. Since the ends of the liquid fertilizer opener and the seeding opener are equipped with sensor contacts, the status of fertilization and seeding can be monitored at any time. 4. The adjustable pressing mechanism is selected, and the pressure of the pressing wheel can be adjusted at any time according to the agronomic requirements of the grassland protection, which is convenient to adjust and reliable to use.

Description of drawings

Fig. 1 a kind of schematic diagram of natural pasture rejuvenation supplementary sowing fertilizer applicator;

Fig. 2 is a top view of a kind of natural pasture rejuvenation and supplementary sowing fertilizer applicator;

Fig. 3 is a front view of a natural grassland rejuvenation and supplementary sowing fertilizer applicator;

Fig. 4 Schematic diagram of liquid fertilizer ditch opener structure;

Fig. 5 top view of liquid fertilizer ditch opener;

A-A section in Fig. 6 and Fig. 4;

Fig. 7 plow shovel schematic diagram (B to view among Fig. 4);

Fig. 8 is a schematic diagram of the structure of the seed row opener;

Figure 9 is a top view of the structure of the seed row opener;

Fig. 10 is a structural schematic diagram of an adjustable suppression mechanism;

Figure 11 is the top view of the structure of the adjustable suppression mechanism;

Fig. 12 Structural schematic diagram of pressure regulator (C-C sectional view in Fig. 11);

D direction view in Fig. 13 Fig. 12;

Figure 14 Figure 10 in the E direction expansion;

Fig. 15 schematic diagram of liquid fertilizer control device;

Figure 16 Partial enlarged view of B in Figure 12;

Legend: G is the ground, 1 is the rear bracket of the tractor casing, 2 is the suspension frame, 3 is the main frame, 4 is the hydraulic control device, 5 is the liquid fertilizer tank, 6 is the seed box, 7 is the seed delivery tube, 8 is the can Adjustable suppression mechanism, 9 is the seeding opener, 10 is the liquid fertilizer delivery pipe, 11 is the liquid fertilizer opener, 12 is the ground wheel, 13 is the notched disc device, 13.1 is the notched disc knife, 13.2 is the knife shaft, 13.3 Depth adjustment oil cylinder, 14 clamp and fastening bolt, 15 fixed plate, 16 connecting plate, 17 plow column, 18 fertilizer delivery pipe, 19 guard plate, 20 plow shovel, 21 fixed bolt and nut , 22 is a countersunk head bolt nut, 23 is a seeding conduit, 24 is a side wing plate, 25 is a ditch opener shovel, 26 is a U-shaped fixed plate, 27 is a pin a, 28 is a pressure spring, 29 is a baffle plate, 30 is a pressure rod, 31 is a pressure regulator, 31.1 is a shell, 31.2 is a shaft, 31.3 is a compression spring, 31.4 is a gasket, 32 is a pressure adjustment handle, 32.1 is a positioning claw, 33 is a connecting arm a, 34 is a pressing wheel , 35 is the eccentric cam, 36 is the pin b, 37 is the positioning rod, 38 is the pressure adjustment nut, 39 is the connecting arm b, 40 is the liquid fertilizer distribution valve, 41 is the flow control valve, 42 is the diaphragm pump, 43 is the DC motor , 44 are fertilizing nozzles, 45 are sensor contacts, 46 are outer groove wheel seed metering devices, and 47 are transmission systems.

Detailed ways

In order to more clearly illustrate the technical solutions in the embodiment of the utility model or the prior art, the utility model will be described in detail below in conjunction with the accompanying drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so as to understand the utility model The scope of protection of utility models is more clearly defined.

As shown in Fig. 1, Fig. 2 and Fig. 3, a natural grassland rejuvenation supplementary sowing fertilizer applicator includes a suspension frame 2, a main frame 3, a gap disc device 13, a liquid fertilizer control device 4, a liquid fertilizer tank 5, and a seed box 6 , liquid fertilizer ditch opener 11, seeding ditch opener 9, adjustable suppression mechanism 8, ground wheel 12.

The notch disc device 13 is fixed below the front end of the main frame 3 by clamps and set bolts 14, and it includes a notch disc cutter 13.1, a cutter shaft 13.2, and a depth adjustment oil cylinder 13.3. One end of depth adjustment oil cylinder 13.3 is hinged on the tractor casing rear support 1, and one end is hinged with cutter shaft 13.2. By adjusting the depth adjustment oil cylinder 13.3, the penetration depth of the notched disc cutter 13.1 can be forcibly adjusted, and the depth can reach 150mm to 200mm. The notched disc cutter device has been applied for a patent (№2017108304121.0).

Liquid fertilizer tank 5 is installed on main frame 3 middle part tops, is used for containing liquid fertilizer or water.

As shown in Fig. 4, Fig. 5, Fig. 6 and Fig. 7, the liquid fertilizer ditch opener 11 is fixed below the main frame 3 through the fixing plate 15, clamps and set bolts 14, and is located behind the gap disc device 13. Each liquid fertilizer Ditch opener 11 and notch disc cutter 13.1 are located on a straight line. Its effect is to ditch and loosen the soil and transport liquid fertilizer on the turf gap that gap disc cutter 13.1 leaves. The liquid fertilizer opener 11 includes a fixed plate 15 , a connecting plate 16 , a plow post 17 , a fertilizer delivery conduit 18 , a guard plate 19 , and a plow shovel 20 . The plow column 17 is curved in the forward direction of the implement, and its cross section is an isosceles triangle with the top angle facing forward, and the angle α is 30°～35°, which is convenient for entering the soil and reducing soil resistance, and does not turn the soil. The width of the rear part is S 40mm to 50mm. The plow column 17 is fixed between the two fixing plates 15 through the connecting plate 16 and fixing bolts and nuts 21 . The front of the plow column 17 is welded with an angled guard plate 19 from top to bottom to enhance the wear resistance of the plow column 17, and the front end of the plow column 17 is fastened with a plow shovel 20 through countersunk bolts and nuts 22, and the width of the plow shovel 20 is M 50mm ~ 60mm, ensure that the plow post has an inverted T-shaped groove with a narrow top and a wide bottom in the soil, so as to store water and protect soil moisture. The plow shovel is made of high manganese steel plate. Plow column 17 rear ends are welded with fertilizer delivery conduit 18, and its inside has liquid fertilizer delivery pipe 10 and fertilization nozzle 44, is used for spraying liquid fertilizer in the soil ditch. The liquid fertilizer conveying pipe 10 is made of polyvinyl chloride high-pressure pipe, and its diameter is 14mm.

As shown in Figure 16, the sensor contact 45 is housed in the fertilizer delivery conduit 18, and the situation of spraying liquid fertilizer by the fertilizing nozzle 44 can be transmitted to the display screen in the tractor cab by the signal line at any time.

As shown in Fig. 8 and Fig. 9, the seeding ditch opener 9 is fixed below the main frame 3 through a clamp and a set bolt 14, and is located behind the liquid fertilizer ditch opener 11. Each seeding ditch opener 9 and liquid fertilizer ditch opener 11 are located on a straight line. The seeding opener 9 includes a seeding conduit 23 , a side wing plate 24 , and a ditching shovel 25 . The ditch opener shovel 25 is triangular, and is welded vertically at the lower end of the seeding conduit 23, and is welded with flank plates 24 at its both sides. The thickness a of the opener shovel 25 is 10 mm to 15 mm, the apex angle β of the cutting edge of the front end entering the soil is 30° to 35°, the angle θ of the bottom edge and the ground entry soil is 3° to 5°, and the distance between the front end cutting edge and the bottom edge is 3° to 35°. cut corner is 50°～60°, and the width E of the rear end of the wing plates 24 on both sides is 45mm～50mm.

As shown in Fig. 1 and Fig. 3, the seed box 6 is fixed on the main frame 3 and is positioned at the rear part of the liquid fertilizer tank 5. An outer sheave seed metering device 46 is installed in the seed box 6, and the outlet end of the outer sheave seed metering device 46 is connected with the seed delivery pipe 7, and the end of the seed delivery pipe 7 is connected with the seed discharge conduit 23. The outer grooved wheel seed metering device 46 is powered by the ground wheel 12 and the transmission system 47 .

As shown in Figure 8, the sensor contact 45 is housed in the seeding conduit 23, and the next kind of situation is transmitted to the display screen in the tractor cab by the signal line at any time.

As shown in FIGS. 10 and 11 , the adjustable suppression mechanism 8 is fixed below the main frame 3 through a U-shaped fixing plate 26 , clamps and set bolts 14 , behind the seeding opener 9 . The function of the adjustable suppression mechanism is to compact the seed ditch opened by the front row seed opener to prevent the seeds from being blown away by the wind and to keep the soil moisture. Each adjustable suppression mechanism 8 is located on a straight line with the seed row opener 9 . The adjustable suppressing mechanism 8 includes a U-shaped fixed plate 26, a pressurizing spring 28, a baffle 29, a pressure regulator 31, a pressure regulating handle 32, a connecting arm a33, a suppressing wheel 34, an eccentric cam 35, a positioning rod 37, and a connecting arm b39 . One end of the pressure rod 30 is hinged with the U-shaped fixed plate 26 through the pin a27, and the other end is fixed with the baffle plate 29 through the pressure adjusting nut 38. The outside of the pressure rod 30 is covered with a pressure spring 28. The lower end of the baffle plate 29 is welded on the connecting arm b39. One end of the connecting arm b39 is hinged to the lower end of the U-shaped fixing plate 26, and the other end is hinged to the connecting arm a33 through the pin b36. A pressing wheel 34 is installed at the rear end of the connecting arm a33, and a pressure regulator 31 is welded on the side of the middle end of the connecting arm a33. The pressure regulator 31 is equipped with a pressure regulating handle 32, which vertically passes through the eccentric camshaft 31.2 at the lower end of the pressure regulating handle 32, and the eccentric camshaft 31.2 outer end is equipped with an eccentric cam 35, and is positioned above the connecting arm a33. By changing the rotation angle of the pressure adjustment handle 32 and the eccentric cam 35, the pressure of the pressing wheel 34 on the seed ditch can be adjusted.

As shown in Figure 12, Figure 13, and Figure 14, the pressure regulator 31 includes a pressure adjustment handle 32, a housing 31.1, an eccentric camshaft 31.2, a compression spring 31.3, and a gasket 31.4, and the pressure adjustment handle 32 passes through the housing 31.1 and the shaft 31.2 , the pressure adjustment handle 32 inside the housing 31.1 is fixed by a compression spring 31.3 and a gasket 31.4, and positioning claws 32.1 are welded on both sides of the pressure adjustment handle 32 outside the housing 31.1, and five rows of two holes are drilled on the housing 31.1. , its effect is to determine the suppression degree of the suppression wheel to the grassland, and the distance between the two positioning claws 32.1 is identical with the row of pitches on the shell 31.1. The slope in front of the connecting arm a33 is close to the positioning rod 37 .

The working principle of the adjustable suppression mechanism is: when the positioning claw of the pressure adjustment handle is inserted into the middle position of the five rows of holes, the eccentric cam just leaves the connecting arm a, and the suppression wheel is driven by the reaction force of the ground to make the connecting arm a revolve around the pin b When it is rotated, the slope in front of the connecting arm a leaves the positioning rod, and the connecting arm a and the pressing wheel are lifted upwards. At this time, the pressing wheel has less pressure on the seed ditch; if the pressure adjustment handle is moved downward, the eccentric cam will withstand the connecting arm a , the slope in front of the connecting arm a is close to the positioning rod. At this time, the connecting arm a and the connecting arm b become a whole, and the pressure of the pressure spring is transmitted to the pressing wheel through the pressure rod, the connecting arm b, and the connecting arm a. The pressure of the suppression wheel against the ground. Conversely, the more you move the pressure adjustment handle upward, the greater the distance between the eccentric cam and the connecting arm a, and the smaller the pressure of the pressure spring is transmitted to the pressing wheel through the pressure rod, connecting arm b, and connecting arm a, reducing the impact on the ground. The pressure can ensure that the pressing wheel can exert appropriate compacting strength on the turf according to the agronomic requirements.

As shown in FIGS. 15 and 16 , the liquid fertilizer control device 4 is installed on the main frame 3 and communicates with the liquid fertilizer tank 5 through the liquid fertilizer delivery pipe 10 . The liquid fertilizer control device 4 includes a DC motor 43 , a diaphragm pump 42 , a liquid fertilizer distribution valve 40 , a flow regulating valve 41 , a liquid fertilizer delivery pipe 10 , and a fertilization nozzle 44 . The fertilization nozzle 44 is a spray gun structure, and is installed at the end of the liquid fertilizer delivery pipe 10 extending into the fertilizer delivery conduit 18 .

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model shall be included in the utility model. within the scope of the new protection.

Claims (8)

1. A fertilizer applicator for rejuvenation of natural pastures, comprising a main frame (3), a gap disc device (13), a fertilizing device, a seeding device, an adjustable suppression mechanism (8) and a ground wheel (12), characterized in that : The main frame (3) is installed on the tractor through the suspension frame (2); The notched disc device (13) is installed and fixed under the front end of the main frame (3), and the notched disc device (13) includes a notched disc knife (13.1), a knife shaft (13.2) and a depth adjustment cylinder (13.3), The knife shaft (13.2) is installed and fixed under the front end of the main frame (3) through the support arm, the clamp and the set bolt (14), and multiple notched disc knives (13.1) are installed on the knife shaft (13.2) according to the interval requirements of pasture farming. Above, one end of the depth adjustment cylinder (13.3) is hinged on the rear bracket (1) of the tractor casing, the other end of the depth adjustment cylinder (13.3) is hinged to the cutter shaft (13.2), and the notch circle is adjusted by adjusting the depth adjustment cylinder (13.3). The penetration depth of disc cutter (13.1); The fertilization device comprises a liquid fertilizer control device (4), a liquid fertilizer tank (5), a liquid fertilizer opener (11) and a fertilization nozzle (44), and the liquid fertilizer opener (11) is installed and fixed on the main frame (3 ) and behind the notched disc device (13), each liquid fertilizer opener (11) corresponds to the notched disc knife (13.1) in front and is located on a straight line, and the liquid fertilizer opener (11) includes a fixed plate ( 15), connecting plate (16), plow column (17), plow shovel (20), plow column (17) is curved toward the forward direction of the natural pasture rejuvenation and supplementary fertilizer applicator, and plow column (17) passes through the connecting plate (16 ) and fixing bolts and nuts (21) are fixed between the two fixing plates (15), and the fixing plate (15) is installed and fixed on the main frame (3) through clamps and fixing bolts (14), and the plow post (17) The rear end is welded with a fertilizer delivery conduit (18), and the inside of the fertilizer delivery conduit (18) is connected with a liquid fertilizer delivery pipe (10) and a fertilizer spray nozzle (44), and the front of the plow column (17) is welded with an angled guard plate (19) from top to bottom. ), the plow column (17) below enters the upper front end and is fastened with a plow shovel (20) by countersunk bolts and nuts (22); the liquid fertilizer tank (5) is installed on the main frame (3), and the liquid fertilizer tank (5) Connect with the fertilization sprinkler (44) by liquid fertilizer conveying pipe (10); Described liquid fertilizer control device (4) is installed on the main frame (3), and liquid fertilizer control device (4) comprises diaphragm pump (42), liquid fertilizer distributing valve ( 40) and the flow regulating valve (41), the diaphragm pump (42) is driven by the DC motor (43) and the liquid fertilizer in the liquid fertilizer tank (5) is delivered to the fertilization nozzle (44) through the liquid fertilizer delivery pipe (10), and the liquid fertilizer distribution valve ( 40) and the flow regulating valve (41) are installed on the liquid fertilizer delivery pipe (10) to carry out liquid fertilizer distribution and flow regulation; the described fertilization nozzle (44) is a spray gun structure, and is installed on the liquid fertilizer stretched into the fertilizer delivery conduit (18). The end of the delivery pipe (10); The sowing device includes a seed box (6) and a seeding opener (9), and the described seeding opener (9) is installed and fixed under the main frame (3) and is located at the liquid fertilizer opener (11). At the rear, each seeding opener (9) is located on a straight line with the liquid fertilizer opener (11) ahead, and the seeding opener (9) includes a seeding conduit (23), a side wing plate (24), an opening The trencher shovel (25), the upper end of the seeding conduit (23) is fixed on the main frame (3) by a clamp and the set bolt (14), and the opener shovel (25) is vertically welded on the lower end of the seeding conduit (23) , the ditch opener shovel (25) is triangular, and the side wings (24) are welded on both sides of the ditch opener shovel (25); the described seed box (6) is fixed on the main frame (3), and the seed box (6 ) is equipped with an outer sheave seed meter (46), and the outer sheave seed meter (46) transmits power from the ground wheel (12) and the transmission system (47), and is connected at the outlet end of the outer sheave seed meter (46) The seed delivery pipe (7), the end of the seed delivery pipe (7) is connected to the seed discharge conduit (23); The adjustable suppressing mechanism (8) is installed and fixed under the main frame (3) and behind the seed row opener (9), and each adjustable suppressor mechanism (8) is connected with the seed row opener (9) in front. ) is located on a straight line, and the adjustable suppression mechanism (8) includes a U-shaped fixed plate (26), a baffle (29), a pressure rod (30), a pressure regulator (31), a connecting arm a (33), a suppression wheel (34), connecting arm b (39), the U-shaped fixed plate (26) is fixed on the main frame (3) by clamps and set bolts (14); the pressure bar (30) One end is hinged with the U-shaped fixed plate (26) through the pin shaft a (27), the other end is fixed with the upper end of the baffle plate (29) through the pressure adjustment nut (38), and the outside of the pressure rod (30) is covered with a pressure spring ( 28); the lower end of the baffle plate (29) is fixed on the connecting arm b (39); one end of the connecting arm b (39) is hinged on the lower end of the U-shaped fixed plate (26), and the other end is connected to the connecting arm a ( 33) Hinged by the pin shaft b (36); the rear end of the connecting arm a (33) is equipped with a pressing wheel (34), and the side of the middle end of the connecting arm a (33) is welded with a pressure regulator (31). The device (31) is used to adjust the pressure of the pressing wheel (34) to the seed ditch, and the slope in front of the connecting arm a (33) is close to the positioning rod (37); The ground wheel (12) is installed below the main frame (3) and rolls on the ground along the forward direction of the natural pasture rejuvenation and supplementary fertilizer applicator. The ground wheel (12) passes through the transmission system (47) and the seed box (6). The inner outer sheave seed metering device (46) is connected, and provides power for the outer sheath wheel seed metering device (46). 2. The fertilizer applicator for rejuvenating natural pastures according to claim 1, characterized in that: the cross-section of the plow column (17) is an isosceles triangle, the apex angle is forward, and the apex angle α is 30°～35° °, the rear width S of plow column (17) is 40mm～50mm. 3. The fertilizer applicator for rejuvenating natural pastures according to claim 1 or 2, characterized in that: the width M of the plow shovel (20) is 50 mm to 60 mm. 4. The fertilizer applicator for rejuvenating natural pastures according to claim 3, characterized in that: the plow shovel (20) is made of high manganese steel. 5. The fertilizer applicator for rejuvenating natural pastures according to claim 1, characterized in that: the liquid fertilizer delivery pipe (10) is made of polyvinyl chloride high-pressure pipe. 6. The fertilizer applicator for rejuvenating natural pastures according to claim 1, characterized in that: the thickness a of the opener shovel (25) is 10 mm to 15 mm, and the blade apex angle β of the front end entering the soil is 30° ～35°, the angle θ between the bottom edge and the ground is 3°～5°, the cutting angle between the front edge and the bottom edge is 50°～60°; the width E of the rear end of the two side wing plates (24) is 45mm～50mm. 7. The fertilizer applicator for rejuvenating natural pastures according to claim 1, characterized in that: said fertilization conduit (18) or seed discharge conduit (23) is equipped with sensor contacts, which can spray liquid fertilizer from the fertilizing nozzle at any time. Or the next situation is transmitted to the display screen in the tractor cab through the signal line. 8. The fertilizer applicator for rejuvenating natural pastures according to claim 1, characterized in that: the pressure regulator (31) includes a pressure regulating handle (32), a casing (31.1) and an eccentric cam (35), the pressure The lower end of the adjustment handle (32) passes through the casing (31.1), compression spring (31.3), spacer (31.4), eccentric cam (35) and eccentric camshaft (31.2) successively, and the pressure adjustment handle inside the casing (31.1) ( 32), fixed by the compression spring (31.3) and the gasket (31.4), the positioning claws (32.1) are welded on both sides of the pressure adjustment handle (32) outside the shell (31.1), and the shell (31.1) is drilled with There are multiple rows of holes, the distance between the two positioning claws (32.1) is the same as that of a row of holes on the housing (31.1), and the positioning claws (32.1) are fixed in the row of holes; the pressure adjustment handle (32) passes through the eccentric camshaft ( 31.2), the eccentric cam (35) is installed on the outer end of the eccentric camshaft (31.2) and above the connecting arm a (33), and the pressure wheel can be adjusted by changing the rotation angle of the pressure adjustment handle (32) and the eccentric cam (35) (34) Pressure on the seed ditch.