Subsurface fertilization mechanism and method for rice paddy

Abstract

The application discloses a sinking type fertilizer applying mechanism and method for rice field, and relates to the field ploughing technical field.The sinking type fertilizer applying mechanism mainly comprises a roller assembly, a rotary fertilizer applying part, a blocking assembly, a material injecting assembly and the like structures.The application is characterized in that the rotary fertilizer applying part is installed on the side of the rotary roller ring, and a discharging groove is designed to be communicated with the horizontal cavity, and a cutting edge part is used to cut the plough layer soil, so that the fertilizer can be mixed with the plough layer soil cut by the cutting edge part in a mixing contact area after the fertilizer is discharged from the discharging groove outlet, and the air flow can overcome the water resistance in the fertilizer downward process, so that the mixing and combination rate of the fertilizer particles and the plough layer soil is ensured.The blocking gap is arranged on the rotary fertilizer applying part, the discharging groove without discharging is blocked, the upstream high position end and the downstream low position end are arranged on the bottom gap of the blocking ring plate, the discharging time node and the mixing and combination process between the cutting edge part and the plough layer soil are further optimized, and the effect of the fertilizer particles entering the plough layer soil is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of farmland tillage technology, and in particular to a sinking type fertilizing mechanism and method for rice field. BACKGROUND

[0002] The ploughing layer, also known as the cultivated soil layer, is a soil layer directly affected by tillage under flooding. On the soil is an irrigation water layer, in which aquatic or hygrophytic plants other than rice, such as algae, waterweeds, and photosynthetic bacteria, live. The surface layer of the soil, about 1 cm thick, is often in an air exchange state, with more oxygen, which is the oxidation layer, yellowish brown (rusty). Below is the reduction layer, which is blue-gray (divalent iron color) due to lack of oxygen and strong reduction. The aerobic microorganisms and nitrogen-fixing bacteria in the oxidation layer are active, and ammonium nitrogen applied to the surface layer is easily oxidized to nitrate nitrogen (called nitrification). Nitrate nitrogen is unstable and is lost with water or leached downward, and is converted into nitrogen gas by denitrifying bacteria (as shown in FIG. 1). The presence of the reduction layer is conducive to the preservation of ammonium nitrogen, so it is better to apply ammonium nitrogen than nitrate nitrogen in rice fields, and the effect is better when applied deeply. Figure 8

[0003] Before rice seedlings are transplanted in a farmland, fertilization is needed, and then irrigation is performed. Generally, the fertilization is performed at the same time as ploughing, and then irrigation is performed. However, a large amount of water is used for irrigation, and sometimes water flows out, which easily carries away a large amount of fertilizer particles in the soil, resulting in the phenomenon that "fertilizer flows to other people's fields". In addition, the water flow is turbulent during irrigation, and many places are washed away, resulting in that the fertilizer content (percentage) is high in some places and low in some places in the farmland, which affects the subsequent growth of rice seedlings.

[0004] In the face of the above problems of dry land fertilization before rice seedling transplantation and fertilizer outflow and uneven distribution during irrigation after rice seedling transplantation, how to solve them has become a difficult problem. SUMMARY

[0005] To solve the above technical problems, the present application provides a sinking type fertilizing mechanism and method for rice field, so that the fertilizer particles can be more efficiently mixed and combined with the ploughing layer soil, and the distribution of the fertilizer in the farmland is more uniform, which is conducive to the high-quality growth of subsequent rice seedling transplants.

[0006] To solve the above technical problems, the present application is realized by the following technical scheme:

[0007] The present application provides a sinking type fertilizing mechanism and method for rice field, which comprises the following contents:

[0008] ​The drum assembly comprises a rotating drum, a suspension support mounted at both ends of the rotating drum, and a driving part provided at one side end of the rotating drum; a horizontal cavity is formed in the rotating drum; a plurality of outer communication grooves are formed in the ring side of the rotating drum and are in communication with the horizontal cavity; and a blocking block for blocking the horizontal cavity is mounted at one side end of the rotating drum.

[0009] The rotating fertilizer applying part comprises a plurality of fixed blades, a discharging area provided at one side of the fixed blade and fixedly connected with the ring side of the rotating drum, and a mixing contact area provided at the other side of the fixed blade.

[0010] The discharging area is provided with a discharging groove in communication with the outer communication groove, and the mixing contact area is provided with a blade edge part. The thickness of the discharging area is greater than the thickness of the surface of the mixing contact area, the outlet of the discharging groove is opposite to the surface of the mixing contact area, the fixed blade is further provided with a blocking gap, and the blocking gap is located between the discharging area and the blade edge part.

[0011] The blocking assembly comprises a plurality of blocking ring plates fixedly mounted on the periphery of the rotating drum, the blocking ring plates are distributed along the ring side of the rotating drum and are matched with the positions of the blocking gaps, the bottom of the blocking ring plate is provided with a gap, and the span range of the gap at the bottom of the blocking ring plate is greater than the width range of one fixed blade. The gap at the bottom of the blocking ring plate forms a high position end and a low position end on both sides, and the high position end is located on the upstream side of the low position end.

[0012] The injection assembly comprises an injection mounting end mounted at the other side end of the rotating drum, an injection end head inserted into the horizontal cavity, and an injection airflow pipe connected with the injection mounting end.

[0013] As a preferred technical scheme of the fertilizer applying mechanism, a first bearing ring is arranged at the connecting position of the suspension support and the rotating drum.

[0014] As a preferred technical scheme of the fertilizer applying mechanism, the front side of the rotating direction of the blade edge part is a blade, and the rear side of the blade edge part protrudes from the surface of the mixing contact area.

[0015] As a preferred technical scheme of the fertilizer applying mechanism, the radial width size of the blocking gap is greater than the radial width size of the blocking ring plate.

[0016] As a preferred technical scheme of the fertilizer applying mechanism, the side of the discharging area facing the mixing contact area is in an arc structure, and a gap of 1-2 mm exists between the outlet of the discharging groove and the blocking ring plate.

[0017] As a preferred technical scheme of the fertilizer applying mechanism, a plurality of fixed support rods are fixedly connected between the blocking ring plate and the rotating drum.

[0018] As a preferred technical scheme of the fertilizer application mechanism of the application: a second bearing ring is arranged between the injection installation end and the outer ring side surface of the rotating drum.

[0019] The application provides a sinking type fertilizer application method for rice fields.

[0020] S1. The external lifting mechanism drives the rotating drum to descend by a certain distance through the suspension support, so that the blade part can cut into the position of the plough layer soil.

[0021] S2. The external rotating drive mechanism drives the rotating drum to rotate through the driving part, and the rotating blade part cuts the plough layer soil on the front side of the blade.

[0022] S3. Meanwhile, the air flow feeding mechanism starts to output the feed, and the fertilizer particles enter the horizontal cavity of the rotating drum through the injection air flow pipe.

[0023] S3.1. At the position of the fixed blade plate rotating from the high position to the low position: the fertilizer particles in the horizontal cavity descend along the outer communication groove in the low position and the discharge groove, and when the discharge groove outlet is separated from the high end of the blocking ring plate, the fertilizer particles in the discharge groove are discharged and reach the mixing contact area, the soil cut by the blade part reaches the mixing contact area after passing through the blade part, and the soil is mixed with the fertilizer particles in the mixing contact area and gradually separates from the mixing contact area.

[0024] S3.2. At the position of the fixed blade plate rotating from the low position to the high position: the discharge groove outlet is blocked by the low end of the blocking ring plate, and the rotating drum continues to rotate, and the fertilizer particles in the discharge groove and the outer communication groove start to flow back to the horizontal cavity in the reverse direction.

[0025] S4. When the air flow feeding mechanism injects the fertilizer particles into the horizontal cavity, the air flow is discharged from the discharge groove which is not blocked by the blocking ring plate along with the air flow injection, thereby increasing the kinetic energy of the fertilizer particles discharged from the discharge groove, and when the air pressure in the horizontal cavity is large, the air flow is discharged from the narrow gap between the discharge groove outlet which is not blocked by the blocking ring plate and the blocking ring plate.

[0026] Compared with the prior art, the application has the following beneficial effects:

[0027] 1. The application does not perform pre-seeding fertilization before seedling transplanting irrigation, and after irrigation, the rotating drum with a horizontal cavity is designed, the rotating fertilizer part is installed on the ring side of the rotating drum, the discharge groove communicating with the horizontal cavity is designed, the blade part for cutting the plough layer soil is used, the fertilizer is discharged from the discharge groove outlet, and the plough layer soil cut by the blade part is mixed in the mixing contact area, and the air flow effect can overcome the water resistance in the downward process of the fertilizer, so as to ensure the mixing and combination rate of the fertilizer particles and the plough layer soil.

[0028] 2. The application blocks the discharge channel without material by configuring the blocking ring plate and opening the blocking gap in the rotating fertilizer application part, and further optimizes the discharge time node and the mixing process between the cutting blade part and the cut soil, and improves the effect of fertilizer particles entering the plough layer soil. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the main structure diagram of the sinking fertilizer application mechanism in the application.

[0030] Figure 2 It is Figure 1 the schematic diagram of the local enlargement of A in the middle.

[0031] Figure 3 It is the cooperation schematic diagram of the rotating fertilizer application part and the blocking assembly in the application.

[0032] Figure 4 It is the schematic diagram of the rotating fertilizer application part in the application.

[0033] Figure 5 It is the schematic diagram of the blocking assembly in the application.

[0034] Figure 6 It is the schematic diagram of the sinking discharge of fertilizer particles in the application Figure 1 .

[0035] Figure 7 It is the schematic diagram of the sinking discharge of fertilizer particles in the application Figure 2 .

[0036] Figure 8 It is the schematic diagram of the nitrogen element conversion of paddy field soil.

[0037] Among them: 1-roller assembly, 101-rotating roller, 102-horizontal cavity, 1021-outer communication groove, 103-hanging support, 1031-first bearing ring, 104-driving part, 105-blocking block; 2-rotating fertilizer application part, 201-fixed knife plate, 2011-mixing contact area, 202-discharge area, 203-discharge channel, 204-knife edge, 205-blocking gap; 3-blocking assembly, 301-fixed support rod, 302-blocking ring plate, 3021-high end, 3022-low end; 4-feeding assembly, 401-feeding installation end, 4011-feeding end, 402-second bearing ring, 403-feeding air flow pipe. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0039] Embodiment one, the present application designs a sinking type fertilizing mechanism for rice field, mainly including roller assembly 1, rotating fertilizing part 2, blocking assembly 3, material injection assembly 4 and other structures, the specific structure contents are as follows:

[0040] Please refer to Figure 1 , Figure 2 , the roller assembly 1 includes rotating roller 101, horizontal cavity 102, suspension bracket 103, driving part 104, the suspension bracket 103 is installed at both sides of the rotating roller 101, the suspension bracket 103 is provided with a first bearing ring 1031 at the connecting position with the rotating roller 101, the driving part 104 is located at one side end of the rotating roller 101, the rotating drive mechanism drives the driving part 104 through gear or belt, thereby driving the rotating roller 101 to rotate, the suspension bracket 103 supports the rotating rotating roller 101 through the first bearing ring 1031. The horizontal cavity 102 is located in the rotating roller 101, a plurality of outer communication grooves 1021 are formed on the side of the rotating roller 101, the outer communication grooves 1021 are communicated with the horizontal cavity 102, and the rotating roller 101 is provided with a blocking block 105 for blocking the horizontal cavity 102 at one side end. When it is necessary to clean the horizontal cavity 102, the blocking block 105 can be removed, and the horizontal cavity 102 can be cleaned.

[0041] Please refer to Figure 2 , Figure 3 , Figure 4 , the rotating fertilizing part 2 includes a plurality of fixed knife plates 201, taking the vertically downward fixed knife plate 201 as an example: the upper side is provided with a discharging area 202, and the lower side is provided with a mixing contact area 2011, the discharging area 202 is fixedly connected with the side of the rotating roller 101, the discharging area 202 is provided with a discharging groove 203, the discharging groove 203 is aligned and communicated with the discharging groove 203 of the outer communication groove 1021, and the mixing contact area 2011 is provided with a blade part 204, the fertilizer particles discharged from the discharging groove 203 and the soil stirred by the blade part 204 are contacted and mixed together in the mixing contact area 2011.

[0042] In combination with Figure 6 , Figure 7 , the rotating roller 101 drives the fixed knife plate 201 to rotate in the clockwise direction, the front side of the rotating direction of the blade part 204 is the blade, and the rear side of the blade part 204 protrudes from the surface of the mixing contact area 2011.

[0043] The discharging area 202 is thicker than the mixing contact area 2011, that is, the discharging area 202 protrudes from the surface of the mixing contact area 2011, the outlet of the discharging channel 203 is opposite to the surface of the mixing contact area 2011, and the fertilizer particles are discharged from the outlet of the discharging channel 203 and just reach the surface of the mixing contact area 2011. The fixed blade plate 201 is further provided with a blocking gap 205 located between the discharging area 202 and the blade edge part 204.

[0044] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 The blocking ring plate 302 is fixedly connected with the rotating drum 101 through a plurality of fixed support rods 301, the fixed support rods 301 firmly fix the blocking ring plate 302 on the periphery of the rotating drum 101, the number of the blocking ring plates 302 is multiple, the blocking ring plates 302 are distributed along the ring side of the rotating drum 101, and the positions of the blocking ring plates 302 are matched with the blocking gap 205.

[0045] The bottom of the blocking ring plate 302 is provided with a gap, the span range of the gap at the bottom of the blocking ring plate 302 is greater than the width range of one fixed blade plate 201, as shown in Figure 4 、 Figure 5 The width range of the fixed blade plate 201 is Da, the span range of the gap at the bottom of the blocking ring plate 302 is Dc, and Dc>Da, so that the fixed blade plate 201 can form a certain discharging width range, and the discharging stroke range of the fertilizer particles is ensured.

[0046] The radial width size of the blocking gap 205 is greater than the radial width size of the blocking ring plate 302, as shown in Figure 4 、 Figure 5 The radial width size of the blocking gap 205 is La, the radial width size of the blocking ring plate 302 is Lc, La>Lc, and the inner side of the blocking ring plate 302 is very close to the inner side wall surface of the blocking gap 205, so that the blade edge part 204 does not contact the blocking ring plate 302 during rotation.

[0047] The side of the discharging area 202 facing the mixing contact area 2011 is provided in an arc shape, and the gap between the outlet of the discharging channel 203 and the blocking ring plate 302 has a size of 1 mm, 2 mm or the like.

[0048] The side end of the gap at the bottom of the blocking ring plate 302 is a high-position end 3021, and the other side end is a low-position end 3022, the high-position end 3021 is located on the upstream side of the rotating direction of the fixed blade plate 201 and is high, and the low-position end 3022 is located on the downstream side of the rotating direction of the fixed blade plate 201 and is low.

[0049] Please refer to Figure 1 、Figure 2 The injection assembly 4 comprises an injection mounting end 401, an injection airflow pipe 403, the injection mounting end 401 is mounted at the other side end of the rotating drum 101, an injection end head 4011 is located at one side of the injection mounting end 401 and inserted into the horizontal cavity 102, the injection mounting end 401 is further connected with the injection airflow pipe 403, the fertilizer particles in the injection airflow pipe 403 are injected into the horizontal cavity 102 from the injection end head 4011 through the air pump at the upstream. The second bearing ring 402 is arranged between the injection mounting end 401 and the outer ring side surface of the rotating drum 101, which stabilizes the connection between the injection mounting end 401 and the rotating drum 101 and forms positioning and supporting effect on the injection mounting end 401 and the injection airflow pipe 403.

[0050] In the second embodiment, a sinking type fertilization method for rice seedlings before rice seedling transplanting is designed, and the specific method is as follows:

[0051] Firstly, the external lifting mechanism drives the rotating drum 101 to descend by a certain distance through the suspension support 103, so that the blade part 204 can cut into the position of the plough layer soil, the external rotating driving mechanism drives the rotating drum 101 to rotate through the driving part 104, and the rotating blade part 204 cuts the plough layer soil on the front side of the blade. At the same time, the airflow feeding mechanism of the fertilizer particles starts to output the feeding, and the fertilizer particles enter the horizontal cavity 102 of the rotating drum 101 through the injection airflow pipe 403.

[0052] Case one: the position of the fixed blade plate 201 rotating from the high position state to the low position state: the fertilizer particles in the horizontal cavity 102 descend along the outer communication groove 1021 in the low position and the discharge groove 203, when the outlet of the discharge groove 203 is separated from the high end 3021 of the blocking ring plate 302, the fertilizer particles in the discharge groove 203 are discharged and reach the mixing contact area 2011, the soil cut by the blade part 204 reaches the mixing contact area 2011 after passing through the blade part 204, mixes with the fertilizer particles in the mixing contact area 2011, and gradually separates from the mixing contact area 2011.

[0053] Case two: the position of the fixed blade plate 201 rotating from the low position state to the high position state: the outlet of the discharge groove 203 is blocked by the low end 3022 of the blocking ring plate 302, the rotating drum 101 continues to rotate, and the fertilizer particles in the discharge groove 203 and the outer communication groove 1021 begin to flow back to the horizontal cavity 102 in the reverse direction.

[0054] After the fertilizer granules enter the transverse cavity 102 of the rotating drum 101, the high end 3021 of the sealing ring plate 302 can release the fertilizer granules in the lowered external connecting groove 1021 and the discharge groove 203 in advance. When the soil cut by the blade 204 reaches the mixing contact area 2011, the fertilizer granules have also reached the mixing contact area 2011, and the two can come into contact and mix in time. The low end 3022 of the sealing ring plate 302 can slightly block the outlet of the discharge groove 203 in advance. After the fertilizer granules discharged from the discharge groove 203 are mixed with the soil cut by the blade 204 in the last stage, the blade 204 is separated from the soil, and the discharge groove 203 no longer discharges fertilizer granules, reducing the amount of fertilizer granules discharged on the surface of the topsoil.

[0055] like Figure 6 , Figure 7 The four discharge channels 203 are as follows: discharge channel 1 203a, discharge channel 2 203b, discharge channel 3 203c, and discharge channel 4 203d. Figure 6 As the discharge trough 1 (203a) disengages from the high end (3021) of the sealing ring plate (302), fertilizer particles begin to be discharged, while the discharge trough 2 (203b) is blocked by the low end (3022) of the sealing ring plate (302). Discharge trough 1 (203a) continues to rotate, and discharge trough 2 (203b) rotates to an even higher position. The fertilizer particles in discharge trough 2 (203b) then flow back into the transverse cavity (102). Some fertilizer particles in the transverse cavity (102) also begin to move towards discharge trough 4 (203d), preparing for the timely discharge of fertilizer particles from the high end (3021) of the sealing ring plate (302) in the subsequent discharge trough 4 (203d).

[0056] In addition, when the airflow feeding mechanism injects fertilizer granules into the transverse cavity 102, the airflow is discharged from the discharge channel 203 that is not blocked by the sealing ring plate 302, increasing the kinetic energy of the fertilizer granules as they exit the discharge channel 203. When operating in irrigated farmland, this can overcome certain water resistance and allow the granules to descend more effectively to the area where they mix with the topsoil. When the airflow pressure in the transverse cavity 102 is high, the airflow exits through the narrow gap between the outlet of the remaining unblocked discharge channel 203 and the sealing ring plate 302. This gap between the outlet of the discharge channel 203 and the sealing ring plate 302 allows the discharge area 202 to smoothly enter the area blocked by the sealing ring plate 302. The gap size should not be too large to prevent a large number of fertilizer granules from being blown out through the gap.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sunken fertilizer application mechanism for rice paddies, characterized in that, include: Roller assembly (1): includes a rotating roller (101) and suspension brackets (103) installed on both sides of the rotating roller (101). One side of the rotating roller (101) is also provided with a drive unit (104). A transverse cavity (102) is opened inside the rotating roller (101). A plurality of external connecting grooves (1021) communicating with the transverse cavity (102) are opened on the circumferential side of the rotating roller (101). A sealing block (105) for sealing the transverse cavity (102) is installed on one side of the rotating roller (101). Rotary fertilizer applicator (2): includes multiple fixed blades (201), one side of the fixed blades (201) is provided with a discharge area (202) that is fixedly connected to the circumferential side of the rotating drum (101), and the other side of the fixed blades (201) is provided with a mixing contact area (2011). The discharge area (202) is provided with a discharge channel (203) that is aligned and connected with the external communication channel (1021), and the mixing contact area (2011) is provided with a blade section (204). The thickness of the discharge area (202) is greater than the thickness of the surface of the mixing contact area (2011), the outlet of the discharge channel (203) faces the surface of the mixing contact area (2011), and the fixed blade plate (201) is also provided with a sealing notch (205), which is located between the discharge area (202) and the blade part (204). The sealing assembly (3) includes multiple sealing ring plates (302) fixedly installed around the rotating drum (101). The sealing ring plates (302) are distributed along the circumferential side of the rotating drum (101) and are matched with the position of the sealing notch (205). The bottom of the sealing ring plate (302) is provided with a notch, and the span of the bottom notch of the sealing ring plate (302) is greater than the width of a fixed blade (201). Among them, a high end (3021) and a low end (3022) are formed on both sides of the bottom notch of the sealing ring plate (302). Based on the rotation direction of the fixed blade plate (201) driven by the rotating roller (101): the high end (3021) is located upstream of the low end (3022); Injection assembly (4): includes an injection mounting end (401) installed on the other side of the rotating drum (101), the injection mounting end (401) is provided with an injection end head (4011) inserted into the transverse cavity (102), and the injection mounting end (401) is also connected to an injection airflow pipe (403).

2. The sunken fertilizer application mechanism for rice paddies according to claim 1, characterized in that: A first bearing ring (1031) is provided at the connection position between the suspension bracket (103) and the rotating drum (101).

3. The sunken fertilizer application mechanism for rice paddies according to claim 1, characterized in that: Based on the rotation direction of the fixed blade plate (201) driven by the rotating roller (101): the front side of the blade part (204) in the rotation direction is the blade, and the rear side of the blade part (204) protrudes from the surface of the mixing contact area (2011).

4. The sunken fertilizer application mechanism for rice paddies according to claim 1, characterized in that: The radial width of the sealing notch (205) is greater than the radial width of the sealing ring plate (302).

5. The sunken fertilizer application mechanism for rice paddies according to claim 1, characterized in that: The discharge area (202) has an arc-shaped structure on the side facing the mixing contact area (2011), and there is a gap of 1-2 mm between the outlet of the discharge channel (203) and the sealing ring plate (302).

6. The sunken fertilizer application mechanism for rice paddies according to claim 1, characterized in that: Multiple fixed support rods (301) are fixedly connected between the sealing ring plate (302) and the rotating drum (101).

7. The sunken fertilizer application mechanism for rice paddies according to claim 1, characterized in that: A second bearing ring (402) is disposed between the injection mounting end (401) and the outer ring side of the rotating drum (101).

8. A method for submerged fertilization in rice paddies, characterized in that, The submerged fertilizer application mechanism for rice paddies according to any one of claims 1 to 7 includes the following steps: S1. The external lifting mechanism drives the rotating drum (101) to descend a certain distance through the suspension bracket (103), so that the blade (204) can cut into the topsoil. S2. The external rotary drive mechanism drives the rotary drum (101) to rotate through the drive unit (104), and the rotating blade part (204) cuts the topsoil on the front side of the blade. S3. At the same time, the airflow feeding mechanism of the fertilizer granules begins to output feed, and the fertilizer granules enter the transverse cavity (102) of the rotating drum (101) through the injection airflow pipe (403). S3.

1. At the position of the fixed blade (201) rotating from the high position to the low position: the fertilizer particles in the transverse cavity (102) go down along the outer connecting groove (1021) and the discharge channel (203) in the low position. When the outlet of the discharge channel (203) is separated from the high end (3021) of the sealing ring plate (302), the fertilizer particles in the discharge channel (203) are discharged and reach the mixing contact area (2011). The soil cut by the blade (204) passes through the blade (204) and reaches the mixing contact area (2011), mixes with the fertilizer particles in the mixing contact area (2011), and gradually leaves the mixing contact area (2011). S3.

2. At the position of the fixed blade (201) rotating from the low position to the high position: the outlet of the discharge channel (203) is blocked by the low end (3022) of the blocking ring plate (302), the rotating drum (101) continues to rotate, and the fertilizer particles in the discharge channel (203) and the external connecting channel (1021) begin to flow back to the transverse cavity (102). S4. When the airflow feeding mechanism injects fertilizer particles into the transverse cavity (102), the airflow is injected and discharged from the discharge channel (203) that has never been blocked by the sealing ring plate (302), increasing the kinetic energy of the fertilizer particles discharged from the discharge channel (203). When the air pressure in the transverse cavity (102) is large, the airflow is discharged from the narrow gap between the outlet of the discharge channel (203) that is not blocked by the sealing ring plate (302) and the sealing ring plate (302).

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