CN107801466B - Distributed sorghum leaf fertilizer application method - Google Patents

Distributed sorghum leaf fertilizer application method Download PDF

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Publication number
CN107801466B
CN107801466B CN201711032704.7A CN201711032704A CN107801466B CN 107801466 B CN107801466 B CN 107801466B CN 201711032704 A CN201711032704 A CN 201711032704A CN 107801466 B CN107801466 B CN 107801466B
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urea
cavity
liquid medicine
liquid
sorghum
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CN107801466A (en
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王东芹
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Hunan Yuyihang Biotechnology Co.,Ltd.
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Guizhou Jinhongze Agricultural Development Co ltd
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    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01CPLANTING; SOWING; FERTILISING
    • A01C23/00Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
    • A01C23/04Distributing under pressure; Distributing mud; Adaptation of watering systems for fertilising-liquids
    • A01C23/047Spraying of liquid fertilisers
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01CPLANTING; SOWING; FERTILISING
    • A01C23/00Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
    • A01C23/001Sludge spreaders, e.g. liquid manure spreaders
    • A01C23/002Sludge spreaders, e.g. liquid manure spreaders provided with auxiliary arrangements, e.g. pumps, agitators, cutters
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01CPLANTING; SOWING; FERTILISING
    • A01C23/00Distributing devices specially adapted for liquid manure or other fertilising liquid, including ammonia, e.g. transport tanks or sprinkling wagons
    • A01C23/007Metering or regulating systems
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01MCATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A01M7/0025Mechanical sprayers
    • A01M7/0032Pressure sprayers
    • A01M7/0042Field sprayers, e.g. self-propelled, drawn or tractor-mounted
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01MCATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A01M7/005Special arrangements or adaptations of the spraying or distributing parts, e.g. adaptations or mounting of the spray booms, mounting of the nozzles, protection shields
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01MCATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M7/00Special adaptations or arrangements of liquid-spraying apparatus for purposes covered by this subclass
    • A01M7/0089Regulating or controlling systems

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental Sciences (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Water Supply & Treatment (AREA)
  • Soil Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Catching Or Destruction (AREA)

Abstract

The invention belongs to the field of crop fertilization methods, and provides a distributed sorghum foliar fertilizer fertilization method aiming at the technical problems of low absorption rate of sorghum on foliar fertilizer in the existing foliar fertilizer fertilization method, which comprises the following steps: s1: injecting a urea solution into the urea cavity, injecting a fertilizer solution to be sprayed into the liquid medicine cavity, pumping the urea solution in the urea cavity out of the urea cavity under the action of a water pump, spraying the urea solution out of the front side of the agricultural machine after passing through a urea spray pipe, and then enabling the urea solution to be stained on sorghum in front of the agricultural machine to soften the cuticle of epidermal cells of sorghum leaves; s2: then the wheel rotates forward, in the process of the rotation of the wheel, the driving rod can rotate, and because the connecting part of the driving rod and the wheel is positioned at the non-circle center position of the wheel, the piston and the cylinder plug can both reciprocate under the driving of the driving rod.

Description

Distributed sorghum leaf fertilizer application method
Technical Field
The invention relates to the field of crop fertilization methods, in particular to a distributed sorghum leaf fertilizer fertilization method.
Background
In the middle stage of sorghum growth, farmers can chase twice and three times of foliar fertilizer to ensure the normal growth of sorghum. The foliar fertilizer is a supplement for plants to absorb nutrient components, so as to make up the deficiency of nutrient absorption of root systems, and can greatly improve the yield of sorghum by combining with soil fertilization. The foliar fertilizer is a fertilizer which aims at being absorbed by the leaf surface and directly applies nutrients required by crops to the leaf surface. During fertilization, the fertilizer is mixed with water to prepare a solution with a proper concentration.
The leaf of the plant has upper and lower layers of epidermis comprising epidermal cells, and mesophyll cells under the epidermal tissue can be protected to produce photosynthesis, respiration and other functions without being affected by the change of external adverse conditions. Researches show that the cuticle consists of a long-carbon-chain fatty acid polymer with hydroxyl and carboxyl, the molecular gap of the polymer and the hydrophilic groups of the hydroxyl and the carboxyl on the molecules can allow aqueous solution to permeate into the leaves, and the pores on the surfaces of the leaves are more convenient channels for the foliar fertilizer to enter the leaves. The urea substances in the fertilizer have softening effect on the cuticle of epidermal cells and can accelerate the permeation of other nutrient substances, so that the urea becomes an important component of the foliar fertilizer.
Therefore, the existing fertilization mode of the foliar fertilizer is mainly to mix the fertilizer to be applied with urea, prepare a mixed solution and spray the mixed solution on the leaf surface of sorghum, thereby achieving the purpose of fertilization. However, because it takes a certain time for urea to soften the horny layer of epidermal cells, during this time, moisture in the mixed solution on the leaf surface gradually evaporates, and the fertilizer after moisture evaporation is not easily absorbed, resulting in a decrease in the absorption efficiency of the fertilizer by the leaves, and sometimes even burning of the leaves by the high-concentration mixed solution may occur.
Disclosure of Invention
The invention provides a distributed sorghum foliar fertilizer application method aiming at the technical problems of low sorghum absorption rate on foliar fertilizer in the existing foliar fertilizer application method.
The basic scheme provided by the invention is as follows: the distributed sorghum leaf fertilizer application method is realized by the following devices: the fertilization system of the foliar fertilizer comprises:
the agricultural machine comprises a frame, a power system and wheels in power connection with the power system, wherein the power system is fixed on the frame;
the urea spraying pipe and the liquid medicine spraying pipe are respectively communicated with the urea cavity and the liquid medicine cavity, the urea spraying pipe faces towards the front side of the agricultural machine, the liquid medicine spraying pipe faces towards the rear side of the agricultural machine, and the urea spraying pipe is provided with a water pump;
the atomizing system comprises a driving rod and a jet flow part, one end of the driving rod is rotatably connected with the wheel, the joint of the driving rod and the wheel is located at the non-circle center position of the wheel, the jet flow part comprises a cylinder sleeve and a piston arranged in the cylinder sleeve, a connecting rod is arranged between the driving rod and the piston, the cylinder sleeve is fixed on the side surface of the liquid medicine cavity, a liquid outlet pipe for communicating the cylinder sleeve and the liquid medicine cavity is arranged between the cylinder sleeve and the liquid medicine cavity, and a liquid one-way valve for allowing liquid medicine in the liquid medicine cavity to flow out is;
the elevation angle adjusting system comprises an air bag, an air cylinder body and an air cylinder plug, wherein the air cylinder body is fixed on the side face of the cylinder sleeve, the air cylinder plug is in sliding connection with the air cylinder body, a support is fixedly arranged on the piston and fixedly connected with the air cylinder plug, the support is fixedly connected with a connecting rod and hinged with a driving rod, the air bag is fixed between the liquid medicine spray pipe and the medicine storage box, a vent pipe is arranged between the air bag and the air cylinder body, and an air leakage hole is formed in the air bag;
the method comprises the following steps:
s1: injecting a urea solution into the urea cavity, injecting a fertilizer solution to be sprayed into the liquid medicine cavity, pumping the urea solution in the urea cavity out of the urea cavity under the action of a water pump, spraying the urea solution out of the front side of the agricultural machine after passing through a urea spray pipe, and then enabling the urea solution to be stained on sorghum in front of the agricultural machine to soften the cuticle of epidermal cells of sorghum leaves;
s2: then the wheel rotates forwards, the driving rod can rotate in the rotating process of the wheel, and the piston and the cylinder plug both move in a reciprocating manner under the driving of the driving rod because the connecting part of the driving rod and the wheel is positioned at the non-circle center position of the wheel;
s3: in the process of reciprocating motion of the piston, the cylinder sleeve is fixed on the side surface of the liquid medicine cavity, a liquid outlet pipe for communicating the cylinder sleeve and the liquid medicine cavity is arranged between the cylinder sleeve and the liquid medicine cavity, a liquid one-way valve is arranged on the liquid outlet pipe, when the piston moves downwards, fertilizer solution in the liquid medicine cavity flows into the cylinder sleeve from the liquid one-way valve, and when the piston moves upwards, the fertilizer solution in the cylinder sleeve is sprayed out from the liquid medicine pipe to the rear of the agricultural machine;
s4: in the process that the cylinder plug moves downwards, gas enters the cylinder body from the air leakage hole in the air bag, and the air bag contracts, so that the included angle between the liquid medicine spray pipe and the medicine storage box is reduced; in the process that the cylinder plug moves upwards, gas enters the air bag, and the air bag expands, so that the included angle between the liquid medicine spraying pipe and the medicine storage box is increased, and finally the fertilizer liquid medicine is sprayed backwards with the periodic variable included angle.
The working principle and the advantages of the invention are as follows: firstly, urea solution is injected into the urea cavity, and fertilizer solution to be sprayed is injected into the liquid medicine cavity. The urea solution in the urea cavity is pumped out from the urea cavity under the action of the water pump, the urea solution is sprayed out from the front side of the agricultural machine after passing through the urea spray pipe, and then the urea solution is stained on sorghum in front of the agricultural machine. The urea solution softens the cuticle of the epidermal cells of sorghum leaves.
Then the wheel rotates forward, in the process of the rotation of the wheel, the driving rod can rotate, and the connecting position of the driving rod and the wheel is located at the non-circle center position of the wheel, so that the driving rod, the connecting rod and the piston form a crank-slider mechanism, and the wheel can drive the piston to reciprocate in the rotation process. In the same way, the cylinder plug can also be driven to reciprocate in the cylinder body.
In the process of reciprocating motion of the piston, the cylinder sleeve is fixed on the side surface of the liquid medicine cavity, a liquid outlet pipe for communicating the cylinder sleeve and the liquid medicine cavity is arranged between the cylinder sleeve and the liquid medicine cavity, and a liquid one-way valve is arranged on the liquid outlet pipe. When the piston moves downwards, the fertilizer solution in the liquid medicine cavity can flow into the cylinder sleeve from the liquid one-way valve, and when the piston moves upwards, the fertilizer solution in the cylinder sleeve can be sprayed out from the liquid medicine pipe to the rear of the agricultural machine.
In the reciprocating motion process of the cylinder plug, in the downward motion process of the cylinder plug, gas can enter the cylinder body from the air leakage hole on the air bag, and the air bag contracts, so that the included angle between the liquid medicine spray pipe and the medicine storage box becomes smaller; in the process of the upward movement of the cylinder plug, gas enters the air bag, and the air bag expands, so that the included angle between the liquid medicine spray pipe and the medicine storage box is increased, namely the included angle between the liquid medicine spray pipe and the medicine storage box can be periodically changed in the spraying process.
In this scheme, urea solution adopts the mode of directional spraying forward, can make the chinese sorghum in front of the agricultural machine all can be sprayed urea solution to at the in-process that the agricultural machine marchd, can be the surface form spraying. Then because the blade of sorghum is great with the inclination of horizontal plane, the urea solution that sprays on the blade of higher side can slowly drip for most sorghum leaves are stained with the urea solution, and because agricultural chance passes between the sorghum ground, can touch the sorghum of both sides, make the urea solution on the sorghum leaves more fast fall to the blade surface of lower side from the blade surface of higher side. The fertilizer solution (distinguished from the urea solution) adopts a spraying mode of changing an included angle backwards, so that the fertilizer solution falls on the sorghum leaf surface later in time, namely, the urea solution and the fertilizer solution have a time difference in the falling time of the fertilizer solution on the sorghum leaf surface, and the urea solution can soften the cuticle of epidermal cells in advance. The spraying mode of changing the included angle can ensure that the fertilizer solution is fully sprayed on the leaf surfaces of the sorghum.
The urea solution is not sprayed at a fixed angle in a variable included angle mode, and the urea solution is mainly used for the following reasons, namely, the fixed-angle spraying range is visible and uniform, and a user can conveniently close a water pump according to actual conditions when turning around or turning around; secondly, because the urea solution is sprayed forwards, the sorghum is planted in rows, the row spacing is large, the sorghum can touch the sorghum in the advancing process of the agricultural machine, and the sorghum is naturally stained with the urea solution.
According to the distributed sorghum foliar fertilizer application method, the urea solution is sprayed forwards, the fertilizer solution is sprayed backwards, the urea solution falls onto the sorghum leaf surfaces firstly, the cuticle of epidermal cells is softened by a separate fertilization method, then the fertilizer solution falls onto the sorghum leaf surfaces, and the fertilizer is sprayed onto the softened cuticle, so that the effect of improving the absorption rate of the sorghum on the foliar fertilizer is achieved.
Further, in S1, the angle between the urea nozzle and the medicine box is set to 45 °.
Such design can let the urea solution from urea spray tube spun jet more far, and in the in-process that falls, can be more even fall on the blade of sorghum.
Further, in S3, a second check valve is provided in the chemical solution nozzle.
Such design can not follow the suction gas on the liquid medicine pipe when letting the piston downstream for better follow liquid medicine intracavity suction fertilizer solution when the piston downstream guarantees in the fertilizer solution can be comparatively smooth and easy flows to the cylinder liner.
Further, in S4, set up first level sensor in the urea intracavity, set up second level sensor in the liquid medicine intracavity, set up the display that is used for showing first level sensor and second level sensor liquid level on the frame, with display respectively with first level sensor and second level sensor signal connection.
Such a design can facilitate the user's understanding of the remaining liquid in the urea chamber and the pharmaceutical chamber.
Further, in S1, a constant temperature heater is disposed in the urea chamber to maintain the solution in the urea chamber at 35-45 ℃.
The urea solution in the urea cavity can be kept at the temperature of 35-45 ℃ by the design, and in winter, the urea solution at the temperature is sprayed on leaves of sorghum, so that on one hand, the better softening effect on the cuticle of epidermal cells can be achieved, and the main reason is that the urea solution at the temperature can be kept at the temperature of 25-35 ℃ when falling onto the leaves of the sorghum, and at the temperature, the enzymatic activity in plant cells is higher, the respiration rate is higher, and the absorption efficiency of the sorghum to the fertilizer solution can be improved.
Further, in S1, the heater includes a temperature sensor, a controller, and a heating resistor, the temperature sensor and the heating resistor are both fixed in the urea chamber, and then the temperature sensor and the heating resistor are respectively connected to the controller, so that the controller is configured to control the power of the heating resistor according to the temperature fed back by the temperature sensor.
The design can better ensure that the solution in the urea cavity can keep constant temperature, and avoid overlarge temperature fluctuation.
Drawings
Fig. 1 is a schematic structural diagram of a device for realizing the distributed sorghum foliar fertilizer application method.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: the agricultural machine 10, the wheel 11, the urea cavity 21, the pesticide cavity 22, the urea spray pipe 23, the pesticide spray pipe 24, the driving rod 30, the cylinder sleeve 31, the bracket 32, the cylinder body 33, the air bag 40 and the vent pipe 41.
The basic scheme provided by the invention is as follows: the distributed sorghum foliar fertilizer application method comprises the following steps:
s1: urea solution is injected into the urea cavity 21, fertilizer solution to be sprayed is injected into the pesticide liquid cavity 22, the included angle between the urea spray pipe 23 and the pesticide storage box is set to be 45 degrees, a constant-temperature heater is arranged in the urea cavity 21 to keep the solution in the urea cavity 21 at 37 ℃, the heater comprises a temperature sensor, a controller and a heating resistor, the temperature sensor and the heating resistor are both fixed in the urea cavity 21, then the temperature sensor and the heating resistor are respectively connected with the controller, the controller is used for controlling the power of the heating resistor according to the temperature fed back by the temperature sensor, the urea solution in the urea cavity 21 is pumped out from the urea cavity 21 under the action of the water pump, the urea solution is sprayed out from the front side of the agricultural machine 10 after passing through the urea spray pipe 23, then the urea solution is dipped on the sorghum in front of the agricultural machine 10 to soften the cuticle of epidermal cells of the sorghum leaves;
s2: then the wheel 11 rotates forwards, in the process of rotating the wheel 11, the driving rod 30 rotates, and because the connecting part of the driving rod 30 and the wheel 11 is located at the non-circle center position of the wheel 11, the piston and the cylinder plug both reciprocate under the driving of the driving rod 30;
s3: in the process of reciprocating motion of the piston, as the cylinder sleeve 31 is fixed on the side surface of the pesticide liquid cavity 22, a liquid outlet pipe for communicating the cylinder sleeve 31 and the pesticide liquid cavity 22 is arranged between the cylinder sleeve 31 and the pesticide liquid cavity 22, a liquid one-way valve is arranged on the liquid outlet pipe, when the piston moves downwards, fertilizer solution in the pesticide liquid cavity 22 flows into the cylinder sleeve 31 from the liquid one-way valve, when the piston moves upwards, the fertilizer solution in the cylinder sleeve 31 is sprayed out from the pesticide liquid pipe to the rear part of the agricultural machine 10, and a second one-way valve is arranged on the pesticide liquid spray pipe 24;
s4: in the process that the cylinder plug moves downwards, gas enters the cylinder body 33 from the air leakage hole in the air bag 40, and the air bag 40 contracts, so that the included angle between the liquid medicine spray pipe 24 and the medicine storage box is reduced; in the cylinder stopper upward movement's in-process, during gaseous entering gasbag 40, gasbag 40 inflation for the contained angle increase between liquid medicine spray tube 24 and the explosive box, finally make fertilizer liquid medicine periodic variation contained angle spill backward, set up first level sensor in urea chamber 21, set up second level sensor in liquid medicine chamber 22, set up the display that is used for showing first level sensor and second level sensor liquid level on the frame, with display respectively with first level sensor and second level sensor signal connection.
The embodiment also discloses an apparatus (as shown in fig. 1) for implementing the method, including: agricultural machine 10, explosive box, atomizing system, elevation angle governing system and constant temperature heater.
The agricultural machine 10 comprises a frame, a power system and wheels 11 in power connection with the power system, wherein the power system is fixed on the frame. The agricultural machine 10 is an agricultural four-wheel tractor manufactured by Sihexin mechanical factory.
Be equipped with the urea chamber 21 that is used for holding the urea and the liquid medicine chamber 22 that is used for holding the liquid medicine in the explosive box, urea chamber 21 and liquid medicine chamber 22 are independent each other, be provided with urea spray tube 23 and liquid medicine spray tube 24 on the explosive box, urea spray tube 23 and liquid medicine spray tube 24 communicate with urea chamber 21 and liquid medicine chamber 22 respectively, urea spray tube 23 is towards the side the place ahead of agricultural machine 10, liquid medicine spray tube 24 is towards the side rear of agricultural machine 10, be equipped with the water pump on the urea spray tube 23, urea spray tube 23 and the contained angle between the explosive box are 45. The shape of the medicine storage box is a cuboid, and the middle of the medicine storage box is divided into a urea cavity 21 and a liquid medicine cavity 22 by a partition plate. The medicine storage box is welded on the frame.
The atomizing system comprises a driving rod 30 and a jet flow part, a small convex column is welded on a steel ring of the wheel 11 or a transmission shaft (the steel ring is selected in the embodiment), one end of the driving rod 30 is hinged to the small convex column, the joint of the driving rod 30 and the wheel 11 is located at the non-circle center position of the wheel 11, the jet flow part comprises a cylinder sleeve 31 and a piston arranged in the cylinder sleeve 31, a connecting rod is welded at the end part of the piston, the cylinder sleeve 31 is fixed on the side surface of the liquid medicine cavity 22, a liquid outlet pipe used for communicating the cylinder sleeve 31 and the liquid medicine cavity 22 is arranged between the cylinder sleeve 31 and the liquid medicine cavity 22, a liquid one-way valve used for allowing liquid medicine in the liquid medicine cavity 22 to flow out is arranged on the liquid outlet pipe, and a second one-way valve is arranged on the liquid medicine spray pipe 24.
The elevation angle adjusting system comprises an air bag 40, an air cylinder body 33 and an air cylinder plug, wherein the air cylinder body 33 is fixed on the side face of the cylinder sleeve 31, the air cylinder plug is connected with the air cylinder body 33 in a sliding mode, a support 32 is welded on the piston, the support 32 is welded with a connecting rod, the support 32 is hinged with the driving rod 30, the support 32 is welded with the air cylinder plug, two ends of the air bag 40 are fixedly bonded between the liquid medicine spray pipe 24 and the medicine storage box, a vent pipe 41 is arranged between the air bag 40 and the air cylinder body 33, and an air leakage hole is formed in the air bag 40;
a first liquid level sensor is arranged in the urea cavity 21, a second liquid level sensor is arranged in the liquid medicine cavity 22, a display for displaying the liquid level heights of the first liquid level sensor and the second liquid level sensor is arranged on the frame, and the display is in signal connection with the first liquid level sensor and the second liquid level sensor respectively;
the heater includes temperature sensor, controller and heating resistor, and temperature sensor and heating resistor all fix in urea chamber 21, and temperature sensor and heating resistor are connected with the controller respectively, and the controller is used for the power according to the temperature control heating resistor of temperature sensor feedback, and the heater is used for letting the solution in the urea chamber 21 keep 37 degrees centigrade.
When in specific use: first, a urea solution is injected into the urea chamber 21, and a fertilizer solution to be sprayed is injected into the chemical solution chamber 22. The urea solution in the urea cavity 21 is pumped out from the urea cavity 21 under the action of the water pump, the urea solution passes through the urea spray pipe 23 and then is sprayed out from the front side of the agricultural machine 10, and then the urea solution is stained on the sorghum in front of the agricultural machine 10. The urea solution in the urea cavity 21 is kept at the temperature of 35-45 ℃, and in winter, the urea solution at the temperature is sprayed on leaves of the sorghum, so that on one hand, the urea solution can play a better softening role on the cuticle of epidermal cells, the main reason is that the urea solution at the temperature can be kept at the temperature of 25-35 ℃ when falling onto the leaves of the sorghum, and at the temperature, the enzymatic activity in plant cells is higher, the respiration rate is higher, and the absorption efficiency of the sorghum to the fertilizer solution can be improved.
Then the wheel 11 rotates forwards, and in the process of rotating the wheel 11, the driving rod 30 rotates, and because the connection position of the driving rod 30 and the wheel 11 is located at the non-circle center position of the wheel 11, the driving rod 30, the connecting rod and the piston form a crank-slider mechanism, so that the wheel 11 can drive the piston to reciprocate in the rotating process. Similarly, the cylinder block can be driven to reciprocate in the cylinder block 33.
In the process of reciprocating motion of the piston, as the cylinder sleeve 31 is fixed on the side surface of the liquid medicine cavity 22, a liquid outlet pipe for communicating the cylinder sleeve 31 and the liquid medicine cavity 22 is arranged between the cylinder sleeve 31 and the liquid medicine cavity 22, and a liquid one-way valve is arranged on the liquid outlet pipe. When the piston moves downwards, the fertilizer solution in the pesticide cavity 22 flows into the cylinder sleeve 31 from the liquid one-way valve, and when the piston moves upwards, the fertilizer solution in the cylinder sleeve 31 is sprayed out from the pesticide tube to the rear of the agricultural machine 10. In the reciprocating motion process of the cylinder plug, in the downward motion process of the cylinder plug, gas can enter the cylinder body 33 from the air leakage hole on the air bag 40, and the air bag 40 contracts, so that the included angle between the liquid medicine spray pipe 24 and the medicine storage box is reduced; in the process that the cylinder plug moves upwards, gas enters the air bag 40, and the air bag 40 expands, so that the included angle between the liquid medicine spray pipe 24 and the medicine storage box is increased, namely the included angle between the liquid medicine spray pipe 24 and the medicine storage box can be periodically changed in the spraying process to spray fertilizer.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (4)

1. A distributed sorghum foliar fertilizer application method comprises the steps of firstly dropping a urea solution onto sorghum leaf surfaces, and then dropping a fertilizer solution onto the sorghum leaf surfaces; the method is realized by the following means: the fertilization system of the foliar fertilizer comprises:
the agricultural machine comprises a frame, a power system and wheels in power connection with the power system, wherein the power system is fixed on the frame;
it is characterized by also comprising:
the urea spraying pipe and the liquid medicine spraying pipe are respectively communicated with the urea cavity and the liquid medicine cavity, the urea spraying pipe faces towards the front side of the agricultural machine, the liquid medicine spraying pipe faces towards the rear side of the agricultural machine, and the urea spraying pipe is provided with a water pump;
the atomizing system comprises a driving rod and a jet flow part, one end of the driving rod is rotatably connected with the wheel, the joint of the driving rod and the wheel is located at the non-circle center position of the wheel, the jet flow part comprises a cylinder sleeve and a piston arranged in the cylinder sleeve, a connecting rod is arranged between the driving rod and the piston, the cylinder sleeve is fixed on the side surface of the liquid medicine cavity, a liquid outlet pipe for communicating the cylinder sleeve and the liquid medicine cavity is arranged between the cylinder sleeve and the liquid medicine cavity, and a liquid one-way valve for allowing liquid medicine in the liquid medicine cavity to flow out is arranged on the liquid outlet pipe;
the elevation angle adjusting system comprises an air bag, an air cylinder body and an air cylinder plug, wherein the air cylinder body is fixed on the side face of the cylinder sleeve, the air cylinder plug is in sliding connection with the air cylinder body, a support is fixedly arranged on the piston and fixedly connected with the air cylinder plug, the support is fixedly connected with a connecting rod and hinged with a driving rod, the air bag is fixed between the liquid medicine spray pipe and the medicine storage box, a vent pipe is arranged between the air bag and the air cylinder body, and an air leakage hole is formed in the air bag;
the method comprises the following steps:
s1: setting an included angle between the urea spray pipe and the medicine storage box to be 45 degrees; injecting a urea solution into the urea cavity, injecting a fertilizer solution to be sprayed into the liquid medicine cavity, pumping the urea solution in the urea cavity out of the urea cavity under the action of a water pump, spraying the urea solution out of the front side of the agricultural machine after passing through a urea spray pipe, and then enabling the urea solution to be stained on sorghum in front of the agricultural machine to soften the cuticle of epidermal cells of sorghum leaves;
s2: then the wheel rotates forwards, the driving rod can rotate in the rotating process of the wheel, and the piston and the cylinder plug both move in a reciprocating manner under the driving of the driving rod because the connecting part of the driving rod and the wheel is positioned at the non-circle center position of the wheel;
s3: in the reciprocating motion process of the piston, the cylinder sleeve is fixed on the side face of the liquid medicine cavity, a liquid outlet pipe for communicating the cylinder sleeve and the liquid medicine cavity is arranged between the cylinder sleeve and the liquid medicine cavity, a liquid one-way valve is arranged on the liquid outlet pipe, when the piston moves downwards, fertilizer solution in the liquid medicine cavity can flow into the cylinder sleeve from the liquid one-way valve, when the piston moves upwards, the fertilizer solution in the cylinder sleeve can be sprayed out from the liquid medicine pipe to the lateral rear part of the agricultural machine, and a second one-way valve is arranged on the liquid medicine spray pipe;
s4: in the process that the cylinder plug moves downwards, gas enters the cylinder body from the air leakage hole in the air bag, and the air bag contracts, so that the included angle between the liquid medicine spray pipe and the medicine storage box is reduced; in the process that the cylinder plug moves upwards, gas enters the air bag, and the air bag expands, so that the included angle between the liquid medicine spraying pipe and the medicine storage box is increased, and finally the fertilizer liquid medicine is sprayed backwards with the periodic variable included angle.
2. The distributed sorghum foliar fertilizer application method according to claim 1, wherein in S4, a first liquid level sensor is disposed in the urea cavity, a second liquid level sensor is disposed in the pesticide cavity, a display for displaying the liquid level of the first liquid level sensor and the liquid level of the second liquid level sensor is disposed on the vehicle frame, and the display is in signal connection with the first liquid level sensor and the second liquid level sensor respectively.
3. The distributed sorghum foliar fertilizer application method according to claim 1, wherein in S1, a constant temperature heater is arranged in the urea cavity to keep the solution in the urea cavity at 35-45 ℃.
4. The distributed sorghum foliar fertilizer application method according to claim 3, wherein in S1, the heater comprises a temperature sensor, a controller and a heating resistor, the temperature sensor and the heating resistor are both fixed in the urea cavity, and then the temperature sensor and the heating resistor are respectively connected with the controller, so that the controller is used for controlling the power of the heating resistor according to the temperature fed back by the temperature sensor.
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