CN112461899A - Variable rate fertilization system and control method thereof - Google Patents
Variable rate fertilization system and control method thereof Download PDFInfo
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- CN112461899A CN112461899A CN202011215898.6A CN202011215898A CN112461899A CN 112461899 A CN112461899 A CN 112461899A CN 202011215898 A CN202011215898 A CN 202011215898A CN 112461899 A CN112461899 A CN 112461899A
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- 230000004720 fertilization Effects 0.000 title claims abstract description 184
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002689 soil Substances 0.000 claims abstract description 93
- 239000003337 fertilizer Substances 0.000 claims abstract description 53
- 238000012545 processing Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 241000209094 Oryza Species 0.000 description 15
- 235000007164 Oryza sativa Nutrition 0.000 description 15
- 235000009566 rice Nutrition 0.000 description 15
- 230000035558 fertility Effects 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 7
- 238000007599 discharging Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 238000001914 filtration Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
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- 238000003912 environmental pollution Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/043—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a granular material
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C15/00—Fertiliser distributors
- A01C15/04—Fertiliser distributors using blowers
Abstract
The embodiment of the invention provides a variable rate fertilization system and a control method thereof, wherein the variable rate fertilization system comprises a traction device, a fertilization device, a depth sensor, a soil conductivity sensor and a control device; the fertilizing device is arranged on the traction device; the depth sensor is used for collecting the fertilization depth; the soil conductivity sensor is used for collecting soil conductivity; the control device is used for driving the fertilizing device according to the depth sensor and the soil conductivity sensor. The variable rate fertilization system and the control method thereof provided by the embodiment of the invention can complete variable rate fertilization operation according to the fertilization depth and the soil conductivity, can effectively reduce the fertilizer application amount compared with the conventional side deep fertilization, and can also meet the actual production requirement, thereby improving the fertilizer utilization rate.
Description
Technical Field
The invention relates to the technical field of agricultural machinery, in particular to a variable rate fertilization system and a control method thereof.
Background
The rice is one of the main grain crops in China and even all over the world, and the national data of 2018 shows that the planting area of the rice in China reaches 3.019khm2China is also the biggest world producing country of rice. Fertilization is an important link in the rice production process, and the development of precision agriculture has higher and higher requirements on the intellectualization of agricultural equipment. People pay more and more attention to the environmental problem, avoid the big environmental pollution that causes of fertilization volume, can be accurate fertilize according to the required fertilizer volume of crop, make output maximize under the prerequisite that reduces the fertilization total amount, be a key operation link of accurate agriculture.
At home and abroad, a great deal of research on variable fertilization technology exists, the yield can be maximized on the premise of reducing the total fertilization amount through the variable fertilization technology, but the research on the fertilization technology of rice is less. The existing rice fertilization technology mainly adopts a side deep fertilization technology, but the rice side deep fertilization technology solves the problem of fertilizer surface fertilization, but only can perform uniform strip fertilization, cannot perform variable fertilization and cannot further improve the fertilizer utilization rate.
Disclosure of Invention
The embodiment of the invention provides a variable rate fertilization system and a control method thereof, and aims to be used for variable rate fertilization of rice so as to improve the utilization rate of fertilizers.
The embodiment of the invention provides a variable rate fertilization system, which comprises a traction device, a fertilization device, a depth sensor, a soil conductivity sensor and a control device, wherein the traction device is connected with the fertilization device through a pipeline;
the fertilizing device is arranged on the traction device;
the depth sensor is used for collecting the fertilization depth;
the soil conductivity sensor is used for collecting soil conductivity;
the control device is used for driving the fertilizing device according to the depth sensor and the soil conductivity sensor.
According to the variable rate fertilization system of one embodiment of the invention, the depth sensor is arranged on the fertilization device; and/or the presence of a gas in the gas,
the depth sensor is an ultrasonic sensor.
According to the variable rate fertilization system of one embodiment of the invention, the soil conductivity sensor is arranged at the bottom of the traction device.
According to the variable rate fertilization system, the fertilization device and the soil conductivity sensor are arranged at the rear end of the traction device, and the soil conductivity sensor is positioned below and in front of the fertilizer outlet of the fertilization device.
According to the variable rate fertilization system provided by the embodiment of the invention, the control device comprises a data acquisition module, a data processing module, a serial port communication module and a fertilization controller which are electrically connected;
the data acquisition module is electrically connected with the fertilizing device and the depth sensor;
the fertilization controller is electrically connected with the fertilization device.
According to the variable rate fertilization system of one embodiment of the invention, the traction device is a rice transplanter.
According to the variable rate fertilization system, the variable rate fertilization system further comprises a positioning device, and the positioning device is electrically connected with the control device.
According to the variable rate fertilization system, the positioning device is arranged on the top of the front end of the traction device.
According to the variable rate fertilization system disclosed by the embodiment of the invention, the variable rate fertilization system further comprises a vehicle-mounted display terminal, and the vehicle-mounted display terminal is electrically connected with the control device.
According to the variable rate fertilization system, the variable rate fertilization system further comprises a power supply, and the power supply is electrically connected with the control device.
The embodiment of the invention also provides a control method of the variable rate fertilization system, which comprises the following steps:
obtaining the fertilization depth and the soil conductivity;
determining a target fertilizing amount according to the fertilizing depth and the soil conductivity;
and driving a fertilizing device to fertilize according to the target fertilizing amount.
The method for controlling a variable rate fertilization system according to an embodiment of the present invention, the determining a target fertilization amount based on the fertilization depth and the soil conductivity, includes:
if the fertilizing depth is larger than the fertilizing depth threshold value, determining that the target fertilizing amount is a first fertilizing amount;
and if the fertilization depth is smaller than the fertilization depth threshold value, determining the target fertilization amount according to the soil conductivity.
According to the control method of the variable rate fertilization system, if the fertilization depth is smaller than the fertilization depth threshold value, the determining the target fertilization amount according to the soil conductivity includes:
if the conductivity of the soil is larger than a first conductivity threshold value, determining that the target fertilizing amount is a second fertilizing amount, wherein the second fertilizing amount is larger than the first fertilizing amount;
if the soil conductivity is smaller than the first conductivity threshold value and larger than a second conductivity threshold value, determining that the target fertilizing amount is a third fertilizing amount, wherein the second conductivity threshold value is smaller than the first conductivity threshold value, and the third fertilizing amount is larger than the second fertilizing amount;
and if the conductivity of the soil is smaller than a second conductivity threshold value, determining that the target fertilizing amount is a fourth fertilizing amount, wherein the fourth fertilizing amount is larger than the third fertilizing amount.
The method for controlling a variable rate fertilization system according to an embodiment of the present invention, the determining a target fertilization amount based on the fertilization depth and the soil conductivity, includes:
obtaining fertilization quantity grades according to the fertilization depth and the soil conductivity, wherein the fertilization quantity grades are multiple, and different fertilization quantity grades correspond to different fertilization quantities;
and determining the target fertilizing amount according to the obtained fertilizing amount grade.
The variable rate fertilization system and the control method thereof provided by the embodiment of the invention can complete variable rate fertilization operation according to the fertilization depth and the soil conductivity, can effectively reduce the fertilizer application amount compared with the conventional side deep fertilization, and can also meet the actual production requirement, thereby improving the fertilizer utilization rate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a variable rate fertilization system provided by an embodiment of the invention;
fig. 2 is a schematic flow chart of a control method of a variable fertilization system according to an embodiment of the invention;
fig. 3 is a schematic flow chart of a control method of another variable fertilization system according to an embodiment of the present invention.
Reference numerals:
100: a variable rate fertilization system; 1: a traction device; 2: a fertilizing device; 3: a depth sensor; 4: a soil conductivity sensor; 5: a data acquisition module; 6: a positioning device; 7: a vehicle-mounted display terminal; 8: a power source.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a variable fertilizing system which can be used for lateral deep variable fertilizing of rice, and as shown in fig. 1, the variable fertilizing system 100 comprises a traction device 1, a fertilizing device 2, a depth sensor 3, a soil conductivity sensor 4 and a control device.
As shown in fig. 1, the fertilizer application device 2 is provided to the traction device 1. The traction device 1 may be a rice transplanter or the like, and the fertilizer application device 2 is usually provided at the rear end of the traction device 1. In this embodiment, the fertilizer application device 2 is an air-assisted fertilizer application device, and the air-assisted fertilizer application device includes a fertilizer application driving motor, an air blower, a fertilizer applicator, and the like, and drives the fertilizer application driving motor, and the fertilizer can be discharged through the fertilizer applicator.
As shown in fig. 1, the depth sensor 3 is used to collect the fertilization depth. The depth sensor 3 may be an ultrasonic sensor or the like, and the depth sensor 3 may be a device provided in the traction device 1 or the fertilizer application device 2 or the like.
As shown in fig. 1, a soil conductivity sensor 4 is used to collect soil conductivity. Wherein, the soil conductivity sensor 4 is usually arranged at the bottom of the traction device 1, and the soil conductivity sensor 4 is also arranged at the rear end of the traction device 1, and the soil conductivity sensor 4 is positioned at the lower front part of the fertilizer outlet of the fertilizer applying device 2.
Controlling means electric connection fertilizer injection unit 2, degree of depth sensor 3 and soil conductivity sensor 4, controlling means are used for driving fertilizer injection unit 2 according to degree of depth sensor 3 and soil conductivity sensor 4. The depth sensor 3 can measure the fertilizing depth of the fertilizing device 2, and the fertilizing amount can be relatively reduced compared with the fertilizing amount in a shallow fertilization because the deep fertilization is beneficial to absorption; the soil conductivity sensor 4 can measure the soil conductivity, which can be used as a determination index of soil fertility, and generally, the soil conductivity in a high-fertility field is high, and the soil conductivity in a low-fertility field is low. After the depth sensor 3 and the soil conductivity sensor 4 respectively collect the fertilization depth and the soil conductivity and send the fertilization depth and the soil conductivity to the control device, the control device can control the fertilization device 2 to perform variable fertilizer discharge according to the fertilization depth and the soil conductivity. Specifically, in this embodiment, the control device includes a data acquisition module 5, a data processing module, a serial communication module and a fertilization controller, which are electrically connected; the data acquisition module 5 is electrically connected with the fertilizing device 2 and the depth sensor 3; the fertilization controller is electrically connected with the fertilization device 2. Depth sensor 3 and soil conductivity sensor 4 can acquire fertilization depth information and soil fertility information, data acquisition module 5 can be with the sensor information transmission who gathers to the data processing module analysis processing, in order to obtain fertilization decision information, data processing module sends fertilization decision information to fertilization controller, fertilization controller is according to fertilization decision information drive fertilizer discharging motor, in order to discharge fertilizer through the fertilizer discharging ware, wherein, controlling means can adopt STM32, utilize STM32 to realize data acquisition, processing and communication.
As shown in fig. 1, in this embodiment, the variable rate fertilization system 100 further includes a positioning device 6, the positioning device 6 is electrically connected to the control device, the position and the vehicle speed of the traction device 1 can be obtained through the positioning device 6, and variable rate fertilization can be completed by controlling the vehicle speed and the rotating speed of the fertilizer discharging motor. Wherein, the positioning device 6 can be a GPS device or the like, and the positioning device 6 is usually disposed on the top of the front end of the traction device 1.
As shown in fig. 1, in the present embodiment, the variable fertilizing system 100 further includes an on-board display terminal 7, and the on-board display terminal 7 is electrically connected to the control device. And finally, displaying the fertilization grade, the vehicle speed, the position, the sensor measurement value and the like on the vehicle-mounted display terminal 7 in real time.
As shown in fig. 1, in the present embodiment, the variable fertilizing system 100 further includes a power supply 8, and the power supply 8 is electrically connected to the control device. The power supply 8 can supply power to the variable fertilizing system 100, in this embodiment, the power supply 8 is a 12V power supply, and the power supply 8 is provided in the traction device 1.
As shown in fig. 2, fig. 2 is a control method of a variable fertilization system provided by an embodiment of the present invention, which can be implemented based on the variable fertilization system shown above, and the control method includes, but is not limited to, the following steps:
s210: and obtaining the fertilization depth and the soil conductivity.
Specifically, corresponding information data can be collected in real time or periodically through various sensors on the variable fertilization system, and the collected information data comprise fertilization depth FD and soil conductivity SEC, wherein the variable fertilization system respectively collects the fertilization depth FD and the soil conductivity SEC through the depth sensor and the soil conductivity sensor.
S220: and determining the target fertilizing amount according to the fertilizing depth and the soil conductivity.
Specifically, because deep fertilization facilitates absorption, the fertilization amount can be relatively reduced compared with shallow fertilization, and the soil conductivity can be used as a determination index of soil fertility, in general, the soil conductivity of a high-fertility field is high, and the soil conductivity of a low-fertility field is low, so that the fertilization amount is changed according to the fertilization depth FD and the soil conductivity SEC, and the fertilizer application amount can be effectively reduced on the premise of meeting the actual production requirement.
Optionally, the control device may determine the target fertilizing amount according to the fertilizing depth and the soil conductivity by: if the fertilization depth is larger than the fertilization depth threshold value, the control device determines that the target fertilization amount is a first fertilization amount; and if the fertilization depth is smaller than the fertilization depth threshold value, the control device determines the target fertilization amount according to the soil conductivity.
Concretely speaking, the fertilization depth threshold value X1Can be set according to the actual production conditionFor example, according to the agricultural technology of ' side 3 to 5 ' of air-assisted rice side deep fertilization ', the fertilization depth threshold value X is determined1Is 5 cm. When the fertilization depth FD is equal to the fertilization depth threshold value X1In this case, the control means may be configured to determine the target fertilizing amount as the first fertilizing amount, and the control means may be configured to perform the step of determining the target fertilizing amount based on the soil conductivity.
The control device can determine the target fertilizing amount according to the soil conductivity by the following steps: if the conductivity of the soil is greater than the first conductivity threshold value, determining that the target fertilizing amount is a second fertilizing amount; if the soil conductivity is smaller than the first conductivity threshold value and larger than the second conductivity threshold value, determining that the target fertilizing amount is a third fertilizing amount; and if the conductivity of the soil is smaller than the second conductivity threshold value, determining the target fertilizing amount as a fourth fertilizing amount.
Specifically, the second conductivity threshold value X3Less than a first conductivity threshold X2The second fertilizing amount is larger than the first fertilizing amount, the third fertilizing amount is larger than the second fertilizing amount, and the fourth fertilizing amount is larger than the third fertilizing amount. First conductivity threshold value X2And a second conductivity threshold X3The second conductivity threshold value X can be set according to actual production conditions, for example3Is the average value of the soil conductivity and the first conductivity threshold value X2The sum of the average value of the conductivity of the soil and the standard deviation of the conductivity of the soil. The first fertilizing amount, the second fertilizing amount, the third fertilizing amount and the fourth fertilizing amount can be set according to actual production conditions, for example, the first fertilizing amount is reduced by 23% relative to the normal fertilizing amount, the second fertilizing amount is reduced by 15% relative to the normal fertilizing amount, the third fertilizing amount is reduced by 5% relative to the normal fertilizing amount, and the fourth fertilizing amount is the normal fertilizing amount. When the soil conductivity SEC is equal to the first conductivity threshold value X2When the target fertilizing amount is the second fertilizing amount or the third fertilizing amount, the control device can determine the target fertilizing amount to be the second fertilizing amount or the third fertilizing amount; when the soil conductivity SEC is equal to the second conductivity threshold value X3The control device may determine the target fertilizing amount as the third fertilizing amount or the fourth fertilizing amount.
Optionally, the control device may determine the target fertilizing amount according to the fertilizing depth and the soil conductivity by: obtaining a fertilizing amount grade according to the fertilizing depth and the soil conductivity; and determining the target fertilizing amount according to the obtained fertilizing amount grade.
Specifically, a plurality of fertilizer application rate levels are provided, and different fertilizer application rate levels correspond to different fertilizer application rates, for example, according to the depth of application and the soil conductivity, the rice field is divided into four areas, i.e., a deep fertilizer application area, a high fertilizer application area, a medium fertilizer application area, and a low fertilizer application area, and the fertilizer application rates are divided into four levels "1", "2", "3", and "4", wherein level "1" corresponds to the deep fertilizer application area and the first fertilizer application rate, level "2" corresponds to the high fertilizer application area and the second fertilizer application rate, level "3" corresponds to the medium fertilizer application area and the third fertilizer application rate, and level "4" corresponds to the low fertilizer application area and the fourth fertilizer application rate.
As shown in fig. 3, fig. 3 is a control method of a variable fertilization system provided by an embodiment of the present invention, which can be implemented based on the variable fertilization system shown above, and the control method includes, but is not limited to, the following steps:
step S301: a sensor signal is acquired.
Specifically, corresponding information data can be collected in real time or periodically through various sensors on the variable rate fertilization system, wherein the acquired sensor signals comprise fertilization depth and soil conductivity.
Step S302: and collecting data.
In particular, the control device may collect data in real time or periodically. Wherein the collected data comprises fertilization depth FD and soil conductivity SEC.
Step S303: and (6) filtering the data.
Optionally, the program of the variable fertilization system is written in C language and VC + + language, and the C language programming part mainly realizes the functions of receiving and filtering fertilization depth and soil fertility information during variable fertilization of rice. The control device may perform mean filtering on the information of the sensor, or the control device may analyze the information of the sensor and the GPS.
Step S304: and (5) variable fertilization strategy.
Step S305: and determining the fertilization grade.
Step S306: setting target fertilizing amount.
Step S307: whether the target fertilizing amount is changed or not, if so, executing a step S308; if not, step S309 is executed.
Step S308: and updating the target fertilizing amount.
Step S309: and analyzing the GPS information.
Step S310: and calculating the rotating speed of the fertilizer discharging motor.
Step S311: and finishing fertilizer discharging.
Specifically, collected sensor signals are subjected to data filtering, then are processed through a variable fertilization strategy, the fertilization grade is confirmed, then the fertilization amount is set, and finally variable fertilization is completed through the vehicle speed and the rotating speed of a fertilizer discharging motor. Optionally, the fertilization strategy is to divide the rice field into four areas according to the fertilization depth and the soil conductivity, wherein the four areas are a deep fertilization area, a high fertility area, a medium fertility area and a low fertility area respectively, and then the fertilization amount is divided into four grades of "1", "2", "3" and "4", wherein the grade "1" corresponds to the deep fertilization area and the first fertilization amount, the grade "2" corresponds to the high fertility area and the second fertilization amount, the grade "3" corresponds to the medium fertility area and the third fertilization amount, and the grade "4" corresponds to the low fertility area and the fourth fertilization amount.
Optionally, an embodiment of the present invention further provides a control method for a variable fertilization system, where the control method may be implemented based on the variable fertilization system as described above, and the control method includes, but is not limited to, the following steps:
step S401: a sensor signal is acquired.
Step S402: and (4) calculating the fertilization depth FD and the soil conductivity SEC.
Step S403: determining fertilization depth threshold value X1First conductivity threshold value X2And a second conductivity threshold X3。
Step S404: determining whether the fertilization depth FD is less than the fertilization depth threshold value X1If not, executing step S405; if yes, go to step S406.
Step S405: and judging the fertilizing area to be a deep fertilizing area, outputting decision information of '1', and reducing the fertilizing amount by 23%.
Step S406: determining whether the soil conductivity SEC is less than a first conductivity threshold X2If not, go to step S407; if yes, go to step S408.
Step S407: and judging the area with high fertility, outputting decision information of 2 percent, and reducing the fertilizing amount by 15 percent.
Step S408: determining whether the soil conductivity SEC is less than a second conductivity threshold X3If not, executing step S409; if yes, go to step S410.
Step S409: and judging the area to be a middle fertility area, outputting decision information of 3 percent and reducing the fertilizing amount by 5 percent.
Step S410: and (5) judging the area with low fertility, outputting decision information '4' and normally fertilizing the fertilizer.
The variable rate fertilization system and the control method thereof provided by the embodiment of the invention can complete variable rate fertilization operation according to the fertilization depth and the soil conductivity, can effectively reduce the fertilizer application amount compared with the conventional side deep fertilization, and can also meet the actual production requirement, thereby improving the fertilizer utilization rate.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A variable rate fertilization system is characterized by comprising a traction device, a fertilization device, a depth sensor, a soil conductivity sensor and a control device;
the fertilizing device is arranged on the traction device;
the depth sensor is used for collecting the fertilization depth;
the soil conductivity sensor is used for collecting soil conductivity;
the control device is used for driving the fertilizing device according to the depth sensor and the soil conductivity sensor.
2. A variable rate fertilization system according to claim 1, wherein the depth sensor is provided to the fertilization device.
3. The variable fertilizing system as claimed in claim 1, wherein the soil conductivity sensor is provided at the bottom of the traction device.
4. The variable rate fertilization system of claim 1, wherein the fertilization device and the soil conductivity sensor are both disposed at a rear end of the traction device, the soil conductivity sensor being located below and forward of a fertilizer discharge port of the fertilization device.
5. The variable fertilization system of any one of claims 1-4, wherein the control device comprises a data acquisition module, a data processing module, a serial communication module and a fertilization controller which are electrically connected;
the data acquisition module is electrically connected with the fertilizing device and the depth sensor;
the fertilization controller is electrically connected with the fertilization device.
6. The variable fertilizing system as claimed in any one of claims 1 to 4, further comprising a vehicle-mounted display terminal, wherein the vehicle-mounted display terminal is electrically connected to the control device.
7. A method of controlling a variable rate fertilization system, comprising:
obtaining the fertilization depth and the soil conductivity;
determining a target fertilizing amount according to the fertilizing depth and the soil conductivity;
and driving a fertilizing device to fertilize according to the target fertilizing amount.
8. The method for controlling a variable rate fertilization system of claim 7, wherein the determining a target rate of fertilization based on the depth of fertilization and the soil conductivity comprises:
if the fertilizing depth is larger than the fertilizing depth threshold value, determining that the target fertilizing amount is a first fertilizing amount;
and if the fertilization depth is smaller than the fertilization depth threshold value, determining the target fertilization amount according to the soil conductivity.
9. The method for controlling a variable rate fertilization system of claim 8, wherein the determining the target rate of fertilization based on the soil conductivity if the fertilization depth is less than the fertilization depth threshold comprises:
if the conductivity of the soil is larger than a first conductivity threshold value, determining that the target fertilizing amount is a second fertilizing amount, wherein the second fertilizing amount is larger than the first fertilizing amount;
if the soil conductivity is smaller than the first conductivity threshold value and larger than a second conductivity threshold value, determining that the target fertilizing amount is a third fertilizing amount, wherein the second conductivity threshold value is smaller than the first conductivity threshold value, and the third fertilizing amount is larger than the second fertilizing amount;
and if the conductivity of the soil is smaller than a second conductivity threshold value, determining that the target fertilizing amount is a fourth fertilizing amount, wherein the fourth fertilizing amount is larger than the third fertilizing amount.
10. The method for controlling a variable rate fertilization system of claim 7, wherein the determining a target rate of fertilization based on the depth of fertilization and the soil conductivity comprises:
obtaining fertilization quantity grades according to the fertilization depth and the soil conductivity, wherein the fertilization quantity grades are multiple, and different fertilization quantity grades correspond to different fertilization quantities;
and determining the target fertilizing amount according to the obtained fertilizing amount grade.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113508657A (en) * | 2021-08-13 | 2021-10-19 | 中国农业大学 | Wheat layered variable fertilizing device and method based on prescription chart |
| CN113661822A (en) * | 2021-09-16 | 2021-11-19 | 上海联适导航技术股份有限公司 | Variable rate fertilization method and system based on temperature compensation |
| CN114051810A (en) * | 2021-11-10 | 2022-02-18 | 上海联适导航技术股份有限公司 | Unmanned high-precision agricultural machine fertilization control method and system and intelligent agricultural machine |
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