A method for reducing corn waterlogging damage

Abstract

The application discloses a corn waterlogging damage reduction method, and belongs to the technical field of intelligent agriculture, which comprises the following steps: setting a water supply and drainage system in a corn field; acquiring weather data in a future time; predicting precipitation in the future time, and adjusting the soil moisture content of the corn field during non-precipitation; when it is raining, acquiring the drainage demand of the corn field in real time; when the drainage demand of the corn field is true, acquiring the water content increase rate of the soil of the corn field, and acquiring the drainage speed grade of the water supply and drainage system; based on the drainage speed grade of the water supply and drainage system, adjusting the drainage speed grade of the water supply and drainage system during precipitation in real time; when the precipitation ends and the water supply and drainage system is draining, acquiring the soil moisture content after precipitation in real time, and draining the soil of the corn field. The method solves the problem that the whole-process soil moisture content adjustment of the corn field from before precipitation to after precipitation cannot be realized in the prior art, and thus the corn waterlogging damage is reduced through reasonable water supply and drainage of the corn field.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of intelligent agriculture, and particularly relates to a corn waterlogging damage reduction method. BACKGROUND

[0002] In the process of corn planting, corn waterlogging damage is one of the main causes of corn yield reduction, so an effective method is needed to reduce waterlogging damage. In the current corn waterlogging damage reduction method, mainly through the methods of intertillage, applying fertilizer after the water in the corn field is discharged, preventing and treating diseases and pests after the precipitation, and destroying the seeds as appropriate, etc., these methods can reduce the corn waterlogging damage to a certain extent, but they do not focus on the core factor leading to corn waterlogging damage, that is, the water content of the soil in the corn field, which leads to the fact that when the water content of the soil is too high and the duration of this situation is long, the root system of corn is easy to be in a long-term lack of oxygen state, and even rotten, that is, the current method is difficult to quickly keep the soil water content of the corn field to the most suitable soil water content state for the growth of corn, and even after the implementation of the subsequent current various existing technologies, the damage to the corn root system is irreversible, so that the prevention and control level of corn waterlogging damage is poor.

[0003] Therefore, how to establish a method for quickly reducing the water content of the soil in the corn field to achieve the purpose of reducing corn waterlogging damage is a technical problem that needs to be solved by those skilled in the art. SUMMARY

[0004] In order to reduce the corn waterlogging damage by improving the precipitation discharge speed of the corn field and quickly adjusting the water content of the soil in the corn field, the application discloses a corn waterlogging damage reduction method, in particular:

[0005] A corn waterlogging damage reduction method, the method comprises:

[0006] A water supply and drainage system is arranged in the corn field to supply water for irrigation and discharge accumulated water in the corn field;

[0007] Obtain weather data in the future time to obtain a future time predicted precipitation;

[0008] Based on the future time predicted precipitation, adjust the soil water content of the corn field during non-precipitation by the water supply and drainage system;

[0009] In the precipitation, the drainage demand of the corn field is obtained in real time;

[0010] When the drainage demand of the corn field is true, the water content increase rate of the soil in the corn field is obtained, and the drainage speed level of the water supply and drainage system is obtained;

[0011] adjusting the drainage speed level of the water supply and drainage system in real time during the precipitation;

[0012] obtaining the soil moisture content after the precipitation in real time when the water supply and drainage system is draining, and draining the soil of the corn field.

[0013] Optionally, the water supply and drainage system arranged in the corn field for supplying water to the corn field and draining water includes:

[0014] the water supply and drainage pipes are buried in the furrows and ridges of the corn field, and through holes are uniformly arranged on the water supply and drainage pipes for supplying water to the corn field and draining water;

[0015] water pumps are arranged at both ends of the water supply and drainage pipes, and the water pumps can supply water to or drain water from the water supply and drainage pipes;

[0016] the water supply and drainage pipes and the water pumps constitute the water supply and drainage system and are controlled by the control system.

[0017] Optionally, the weather data in the future time is obtained to obtain the predicted precipitation in the future time, including:

[0018] the weather prediction information in the future time is obtained to obtain the precipitation forecast in the future time;

[0019] the predicted precipitation in the future time is obtained based on the precipitation forecast in the future time.

[0020] Optionally, the soil moisture content of the corn field in the non-precipitation time is adjusted by the water supply and drainage system based on the predicted precipitation in the future time, including:

[0021] the real-time soil moisture content of the corn field is obtained based on the soil moisture content monitoring sensor arranged in the corn field;

[0022] the total amount of precipitation that the corn field can withstand is obtained based on the predicted precipitation in the future time, and the fluctuation amount of the soil moisture content caused by the predicted precipitation in the future time is obtained;

[0023] the predicted soil moisture content of the corn field when the corn field is subjected to the precipitation is obtained based on the real-time soil moisture content of the corn field and the fluctuation amount of the soil moisture content;

[0024] when the predicted soil moisture content of the corn field is not lower than the soil moisture content that causes the corn to be damaged by waterlogging, the water supply and drainage system is operated to drain water and adjust the soil moisture content of the corn field in the non-precipitation time.

[0025] Optionally, when the predicted soil moisture content of the corn field is not lower than the soil moisture content that causes the corn to be damaged by waterlogging, the water supply and drainage system is operated to drain water and adjust the soil moisture content of the corn field in the non-precipitation time, including:

[0026] when the predicted soil moisture content of the corn field is higher than the soil moisture content causing corn waterlogging damage, obtaining a drainage speed of the water supply and drainage system corresponding to the fluctuation amount of the soil moisture content and the predicted rainfall time;

[0027] based on the drainage speed, reducing the soil moisture content of the corn field, and obtaining an amount of drained water of the corn field after the water supply and drainage system is operated in real time;

[0028] based on the amount of drained water of the corn field, obtaining a remaining amount of the fluctuation amount of the soil moisture content, and adjusting the drainage speed of the water supply and drainage system in real time based on the predicted rainfall time until the soil moisture content at a non-rainfall time is reached.

[0029] Optionally, after the soil moisture content of the corn field at the non-rainfall time is adjusted by the water supply and drainage system based on the future time predicted rainfall amount, the method comprises:

[0030] updating weather data in the future time in real time to obtain a corrected future time predicted rainfall amount;

[0031] based on the accuracy of the corrected future time predicted rainfall amount, adjusting the drainage speed of the water supply and drainage system obtained by real-time adjustment to obtain an adjusted drainage speed;

[0032] based on the adjusted drainage speed, adjusting the soil moisture content of the corn field;

[0033] when the deviation degree of the corrected future time predicted rainfall amount and the future time predicted rainfall amount is not in a preset deviation degree interval, the water supply and drainage system stops draining and supplies water to the soil of the corn field, or the drainage speed of the water supply and drainage system is increased.

[0034] Optionally, when it is raining, the method comprises:

[0035] based on a soil moisture content sensor arranged in the corn field, obtaining the soil moisture content of the corn field in real time to obtain a measured soil moisture content of the corn field;

[0036] when the measured soil moisture content of the corn field is not lower than the soil moisture content causing corn waterlogging damage, the drainage demand of the corn field is true;

[0037] when the measured soil moisture content of the corn field is lower than the soil moisture content causing corn waterlogging damage, the drainage demand of the corn field is false.

[0038] Optionally, when the drainage demand of the corn field is true, the method comprises:

[0039] When the drainage requirement of the corn field is true, a real-time value of the moisture content of the soil of the corn field is obtained from the start of the rainfall to a time point when the drainage requirement of the corn field is determined to be true; a change curve of the moisture content of the soil of the corn field is obtained based on the real-time data of the moisture content of the soil of the corn field.

[0040] The change curve of the moisture content of the soil of the corn field is used to obtain a drainage speed level of the drainage system.

[0041] Optionally, the drainage speed level of the drainage system during the rainfall is adjusted in real time based on the drainage speed level of the drainage system, and the method comprises the following steps:

[0042] A real-time moisture content of the soil of the corn field during the drainage is obtained when the drainage system drains according to the drainage speed level.

[0043] A change rate of the moisture content of the soil of the corn field in a drainage speed level detection time step of the drainage system is obtained based on the real-time moisture content of the soil of the corn field during the drainage.

[0044] When the change rate of the moisture content of the soil of the corn field does not fall into a preset change rate interval of the moisture content, a drainage system level corresponding to the change rate of the moisture content of the soil of the corn field is obtained.

[0045] A drainage speed level of the drainage system in a next drainage speed level detection time step of the drainage system is obtained based on the drainage system level.

[0046] Optionally, when the rainfall ends and the drainage system drains, a real-time moisture content of the soil after the rainfall is obtained, and the soil of the corn field is drained, and the method comprises the following steps:

[0047] A real-time moisture content of the soil of the corn field after the rainfall is obtained, and a difference value of the moisture content of the soil suitable for the growth of the corn is obtained to obtain a target value of the moisture content adjustment.

[0048] A post-rainfall moisture content adjustment target value interval in which the target value of the moisture content adjustment is located is obtained to obtain a drainage speed level of the drainage system after the rainfall.

[0049] The corn field is drained after the rainfall based on the drainage speed level of the drainage system after the rainfall.

[0050] The application has the following beneficial effects:

[0051] 1. Improve the drainage speed of the soil in the corn field. In the technical solution of the application, by setting the water supply and drainage system, by burying the water supply and drainage pipeline into the soil, when the water content of the soil is found to be increased, drainage operation is immediately carried out to reduce the water content of the soil, so as to avoid the corn root system in the soil with saturated water content for too long time, resulting in the lack of oxygen of the corn root system.

[0052] 2. Realize the advance adjustment of the water content of the soil in the corn field. In the technical solution of the application, the water supply and drainage system can receive weather data in future time, can obtain the predicted precipitation in future time, and analyze whether the corn will be damaged by waterlogging in this precipitation, if so, based on the water supply and drainage system, the excess water in the corn field is discharged to reduce the water content of the soil in the corn field, which can fully reserve the response time for the water supply and drainage system during precipitation, and for small range and small scale precipitation, the soil water content can be adjusted in advance to ensure that the soil water content will not cause waterlogging damage to the corn during precipitation.

[0053] 3. Realize the whole process precise regulation and control of the water content of the soil in the corn field. In the technical solution of the application, the control process of the waterlogging damage of the corn field contains the whole process of the adjustment of the water content of the soil in the corn field before, during and after precipitation, so as to realize the whole process regulation and control of the soil, and for each regulation and control stage, the drainage speed of the water supply and drainage system is adjusted based on the soil water content parameter or change rate, so as to realize the precise regulation and control of the water content of the soil in the corn field.

[0054] 4. Realize the improvement of the resistance of corn to waterlogging damage. For the avoidance or reduction of the waterlogging damage of corn, one of the main measures is to use drip irrigation and other methods to maintain the water content of the soil, and the application sets the water supply and drainage system to supply water in non-precipitation weather, so that the soil water content is always maintained within a reasonable range, and the health of the corn is improved to effectively resist the waterlogging damage. BRIEF DESCRIPTION OF DRAWINGS

[0055] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the drawings needed to be used in the embodiments of the application or the prior art will be briefly introduced as follows. Obviously, only some embodiments of the application are described in the following description, and other drawings can be obtained by those skilled in the art without creative labor. The drawings are used to provide further understanding of the present disclosure and constitute a part of the specification, and together with the following detailed description, serve to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0056] Figure 1A corn waterlogging damage reduction method flow chart provided in the embodiment of the present application;

[0057] Figure 2 A water supply and drainage pipeline schematic diagram in a corn waterlogging damage reduction method provided in the embodiment of the present application;

[0058] Figure 3 A water supply and drainage system schematic diagram in a corn waterlogging damage reduction method provided in the embodiment of the present application. DETAILED DESCRIPTION

[0059] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, in the embodiments of the present application, “first”, “second”, etc. are used to distinguish similar objects, rather than necessarily describing a specific order or sequence.

[0060] In the corn waterlogging damage reduction process, some methods have been developed, but these methods do not consider adjusting the soil water content during precipitation, that is, the methods currently used are a post-treatment method, and do not involve adjusting the soil water content during the corn waterlogging damage process. This obviously does not consider the most critical factor of corn waterlogging damage. Under the background of the development of smart agriculture, agricultural facilities can already be supplemented, and various intelligent facilities can be set up on the basis of facility agriculture, so that the agricultural data can be adjusted automatically. In the technical solution of the present application, the whole process control of the corn waterlogging damage reduction process is realized, so that when the soil water content of the corn field is too high, the corn waterlogging damage can be reasonably adjusted, so that the soil water content can be maintained at the maximum extent to allow the corn to grow normally.

[0061] The specific implementation method of the present application is as shown in Figure 1 A corn waterlogging damage reduction method flow chart provided in the embodiment of the present application, which comprises:

[0062] S110, a water supply and drainage system is arranged in the corn field to supply water for irrigation and discharge accumulated water.

[0063] S120, weather data in future time is obtained to obtain a predicted precipitation amount in future time.

[0064] S130, based on the predicted precipitation amount in future time, the soil water content of the corn field during non-precipitation is adjusted by the water supply and drainage system.

[0065] S140. During rainfall, obtain the drainage needs of the cornfield in real time.

[0066] S150. When the drainage demand of the cornfield is true, obtain the growth rate of soil moisture content in the cornfield and obtain the drainage speed level of the water supply and drainage system.

[0067] S160. Based on the drainage speed level of the water supply and drainage system, adjust the drainage speed level of the water supply and drainage system during precipitation in real time.

[0068] S170. When the precipitation ends and the water supply and drainage system is draining water, the soil moisture content after precipitation is obtained in real time, and the soil in the cornfield is drained.

[0069] The beneficial effects of the above steps are that they can significantly improve the drainage speed of cornfield soil, allow for advance adjustment of cornfield soil moisture content, and enable precise control of cornfield soil moisture content throughout the entire process. Based on the water supply and drainage system, it can ensure that corn is in a good growth state during its growth process, thereby improving the corn's growth health and enhancing its resistance to waterlogging damage.

[0070] Below, this application will provide a detailed explanation of all the steps mentioned above, specifically:

[0071] As described in step S110, the purpose of this step, in the technical solution of this application, is to utilize the water supply and drainage system to perform drainage operations on the one hand, and to supply water to the cornfield during non-rainfall periods, especially during drought periods, so that the cornfield soil can maintain an appropriate moisture content. In order to achieve these two functions simultaneously, it is necessary to describe the layout method of the water supply and drainage system, specifically:

[0072] S111. Water supply and drainage pipes are buried in the furrows and ridges of the cornfield. Through holes are evenly arranged on the water supply and drainage pipes, and the through holes are used to supply water to and drain water from the cornfield.

[0073] The purpose of this step is that, in the operation of the water supply and drainage system, the entire system, including pumps and pipes, has the ability to supply water to and from the cornfield. Regardless of the function, the pipes used need to be equipped with through holes, which serve to drain water outwards and absorb water from the soil.

[0074] Among them, such as Figure 2 The diagram shown is a schematic of the water supply and drainage pipe in a method for reducing waterlogging damage to corn provided in an embodiment of this application. The water supply and drainage pipe has a through hole. When there is positive pressure in the pipe, the through hole plays the role of draining water outward, and when there is negative pressure, it plays the role of absorbing water.

[0075] Wherein, the water supply and drainage pipes need to be buried in both the ridge and the furrow area, and for the pipe in the furrow part, it can only play a role in drainage, while the pipe on the ridge can play a role in both water supply and drainage.

[0076] In some embodiments, a loose porous structure such as gravel, sand, etc. is arranged outside the water supply and drainage pipe, and a filter screen is arranged outside the pipe. The loose porous structure can effectively collect water resources in the soil of the corn field to improve the drainage efficiency. The filter screen can prevent soil and loose porous structure from entering the pipe during water pumping, which can cause damage to the pipe and water pump.

[0077] Wherein, for the water supply and drainage pipe, considering that the corn field needs to be plowed during each planting cycle, the positions of the field ridge and the furrow will be replaced, so the water pipe is usually not a permanent facility, but is set after plowing each year.

[0078] S112, water pumps are arranged at both ends of the water supply and drainage pipe, which can supply water or pump water into the water supply and drainage pipe.

[0079] The purpose of this step is to improve the drainage speed of the corn field soil if only relying on the unpowered water pipe to discharge water resources. Obviously, it cannot achieve rapid drainage and cannot perform water supply operations. Therefore, a power device needs to be arranged to achieve water supply and drainage of the water supply and drainage pipe.

[0080] Wherein, water pumps are arranged at both ends of the water supply and drainage pipe, and the rotation directions of the rotors of the two water pumps are opposite to improve the water supply and drainage efficiency.

[0081] Wherein, the reason for arranging water pumps at both ends of the drainage pipe is to cope with large-area corn fields, so that sufficient positive or negative pressure can be generated in the water supply and drainage pipe during the operation of the long water pipe to achieve effective water supply or drainage.

[0082] In some embodiments, the furrow is an independently arranged drainage system, and the ridge is arranged with a water supply and drainage system. In this case, the water pump in the furrow part can only provide negative pressure in the water supply and drainage pipe, and the water supply and drainage pipe in the ridge can supply water and drain water.

[0083] Wherein, for the case of arranging only a drainage system in the furrow part, it needs to ensure that the pipe is always filled with water during non-operation, so that the negative pressure in the pipe can be better utilized during the subsequent drainage process to absorb water in the soil into the pipe, thereby effectively draining water.

[0084] Wherein, for the water pump arranged, a certain length of the water supply and drainage pipeline can be used as a water supply and drainage section to improve the water supply and drainage efficiency, and for this case, only one set of water pump can be arranged in each section of the water supply and drainage pipeline, and the other end of the pipeline is blocked to improve the pressure in the pipeline.

[0085] Wherein, as shown in Figure 3 The water supply and drainage system in the corn waterlogging damage reduction method provided by the embodiment of the application is shown in the figure. The water supply and drainage pipeline indicated by the gray part is arranged in the ridge ditch, and the water supply and drainage pipeline indicated by the black part is arranged in the field ridge. For the two types of water supply and drainage pipelines arranged, water supply and drainage water pumps are arranged on both sides, of course, the water pumps can also be arranged without pairing, only one end of the pipeline is arranged, and the other end is blocked to supply water to the corn field or drain water. Further, in the pipeline indicated by the black part, water supply and drainage water pump 1 and water supply and drainage water pump 2 are arranged on both sides of the pipeline. When supplying water to the corn field, water can be supplied to the water supply and drainage pipeline at both ends at the same time, or one water pump is operated and the other water pump is removed to block the port of the water supply and drainage pipeline. Similarly, water supply and drainage water pump 3 and water supply and drainage water pump 4 are arranged at both ends of the pipeline indicated by the gray part. When supplying water to the corn field, the operation mode is the same as that of the black pipeline. When draining water from the corn field, water supply and drainage water pump 1 and water supply and drainage water pump 2 can drain water outward at the same time, or one water pump is removed and the port of the water pump is blocked. Similarly, water supply and drainage water pump 3 and water supply and drainage water pump 4 also adopt this method when draining water from the corn field. In addition, water supply and drainage water pump 3 and water supply and drainage water pump 4 can be arranged to be opened only when actual precipitation or water accumulation exists in the ridge ditch, and the water supply and drainage water pump 3 and water supply and drainage water pump 4 do not have the function of supplying water to the corn field.

[0086] S113, the water supply and drainage pipeline and the water pump constitute a water supply and drainage system and accept control of a control system.

[0087] The purpose of this step is to determine the operation state control of the water supply and drainage system in the background of smart agriculture.

[0088] Wherein, the water supply and drainage pipeline and the water pump are fixedly connected and air leakage is avoided.

[0089] Wherein, the control system includes a control center, various sensors, and a weather forecast information acquisition module to obtain water supply and drainage system control signals for the next period of time.

[0090] Wherein, the water pump in the water supply and drainage system is directly controlled by the control system.

[0091] The beneficial effect of step S110 is that the rational construction of the water supply and drainage system can be achieved by constructing the water supply and drainage system and specifically setting the scheme, and then the system can be used to supply water to the corn field soil when there is no precipitation, so as to ensure that the water content of the soil is always in the most suitable state for the growth of corn, and when precipitation occurs, the water content of the corn field soil is adjusted based on the system.

[0092] As shown in step S120, the purpose of this step is to consider that the soil itself is in the most suitable state for the growth of corn during the process of reducing corn waterlogging damage, so the water content of the corn field soil is always kept in the most suitable state, and any precipitation may cause the water content of the corn field soil to be unsuitable for the growth of corn, which may cause waterlogging damage, so it is necessary to determine the weather data in the future time to obtain the amount of precipitation that may occur in the future time, and the system adjusts the water content of the corn field soil, that is, this step can lay the foundation for the advance adjustment of the water content of the corn field soil. Specifically:

[0093] S121, obtaining weather forecast information in the future time to obtain precipitation forecast in the future time.

[0094] The purpose of this step is to obtain weather forecast information in the future time to predict precipitation data in the future time.

[0095] Among them, in the current agricultural technology, the accurate weather forecast for the next 2-3 days is supported, so in this case, the accuracy of the precipitation forecast in the future time can be ensured to a great extent.

[0096] Among them, for the acquisition of weather forecast information in the future time, the information released by the meteorological station can be obtained, and at the same time, the climate monitoring device arranged in the corn field area is combined to determine the precipitation forecast in the future time, so as to obtain accurate precipitation forecast in the future time.

[0097] S122, based on the precipitation forecast in the future time, obtaining the predicted precipitation amount in the future time.

[0098] The purpose of this step is that the water content of the corn field soil will be affected by precipitation, and at the same time, the current water content of the corn field soil is known, so in order to determine the change of the water content of the corn field soil caused by the future precipitation, it is necessary to accurately obtain the predicted precipitation amount in the future time to determine the water content of the corn field soil.

[0099] Among them, when the precipitation forecast in the future time is determined, the predicted precipitation amount corresponding to the precipitation forecast in the future time needs to be determined.

[0100] Wherein, for the determination process of the predicted rainfall, the obtained weather station release information and the real-time monitoring information of the corn field are used to determine the predicted rainfall in the future time.

[0101] The beneficial effect of step S120 is that the predicted rainfall in the future time is determined by using the weather data available in the future time in the corn field area, so that the change amount of the moisture content of the corn field soil caused by the rainfall in the future time can be determined according to the information, and the moisture content of the corn field soil is adjusted in advance based on the change amount.

[0102] As described in step S130, the purpose of this step is that after the predicted rainfall in the future time of the corn field area is determined, the change value of the moisture content of the corn field soil caused by the predicted rainfall in the future time can be determined according to the parameter, and the moisture content of the corn field soil is adjusted in advance based on the change value. Specifically:

[0103] S131, obtaining the real-time soil moisture content of the corn field based on the soil moisture content monitoring sensor arranged in the corn field.

[0104] The purpose of this step is that in the technical solution of the present application, the moisture content of the corn field soil needs to be adjusted in advance when there is no rainfall, so the basic data for adjusting the moisture content of the corn field soil needs to be obtained based on the current moisture content of the corn field soil.

[0105] Wherein, the moisture content monitoring sensor is arranged in the corn field soil, and the sensor can obtain the real-time moisture content of the corn field soil.

[0106] Wherein, the soil moisture content monitoring sensor can be arranged above or below the water supply and drainage pipeline according to specific detection needs, and the present application does not make any limitation.

[0107] Wherein, the real-time soil moisture content of the corn field needs to obtain accurate real-time data.

[0108] S132, obtaining the total rainfall amount of the corn field based on the predicted rainfall in the future time, and obtaining the moisture content fluctuation amount caused by the predicted rainfall in the future time.

[0109] The purpose of this step is that in order to realize the advance adjustment of the moisture content of the corn field soil, the total rainfall amount of the corn field after the predicted rainfall in the future time really occurs needs to be analyzed, and the soil moisture content fluctuation amount caused by the parameter is determined, which is used to determine the moisture content of the corn field soil that needs to be adjusted.

[0110] Wherein, after the future time prediction precipitation is obtained, the moisture content fluctuation can be determined according to the data and the volume of the corn field soil.

[0111] Wherein, for the volume of the corn field soil, the area of the corn field and the thickness of the fertile plough layer can be used to determine.

[0112] Wherein, for the moisture content fluctuation, the following equation can be used to determine:

[0113] ,

[0114] Wherein, ΔR represents the moisture content fluctuation; N represents the future time prediction precipitation; S represents the corn field area; h represents the corn field soil.

[0115] S133, based on the real-time soil moisture content of the corn field and the moisture content fluctuation, the corn field prediction moisture content when the corn field is subjected to precipitation is obtained.

[0116] The purpose of this step is to determine the moisture content fluctuation, which is determined based on the current measured corn field soil moisture content, so in the specific determination, the difference between the two data is calculated to directly obtain the corn field soil moisture content value before the precipitation actually occurs.

[0117] Wherein, the real-time soil moisture content measured at the current time is directly obtained, and the difference between the value and the moisture content fluctuation is calculated, and the result is the corn field prediction moisture content.

[0118] Wherein, the real-time soil moisture content measured at the current time refers to the corn field soil moisture content collected at the time point when the control system confirms the precipitation data occurring in the future time period.

[0119] Wherein, after the difference between the two data is calculated, it is considered that the corn field soil moisture content obtained after adjustment is needed from the time point when the control system determines that the precipitation will occur in the future to the determined prediction precipitation time point.

[0120] S134, when the corn field prediction moisture content is not less than the soil moisture content causing corn waterlogging damage, the drainage system performs drainage operation and adjusts to the non-precipitation soil moisture content of the corn field.

[0121] The purpose of this step is that the amount of precipitation is different, in some cases, the amount of precipitation is not enough to cause the corn field soil moisture content to cause corn waterlogging damage problem, if this case also needs to adjust the corn field soil moisture content, obviously unnecessary, so the purpose of this step is to determine whether the operation state of the water supply and drainage system needs to be adjusted, and to determine whether the corn field soil moisture content needs to be adjusted.

[0122] Wherein, the current corn field soil moisture content and the moisture content fluctuation amount are summed up to obtain the corn field predicted moisture content without pre-drainage.

[0123] Wherein, the obtained corn field predicted moisture content and the soil moisture content causing corn waterlogging damage are compared to obtain whether the corn field predicted moisture content is not lower than the soil moisture content causing corn waterlogging damage.

[0124] Wherein, the soil moisture content causing corn waterlogging damage can be obtained according to agricultural experience, such as when the corn field soil moisture content reaches 100%, it will inevitably cause corn waterlogging damage, at this time, the moisture content of 100% can be considered as the soil moisture content causing corn waterlogging damage.

[0125] Wherein, the soil moisture content causing corn waterlogging damage can also be set according to the experience of agricultural technicians.

[0126] In some embodiments, considering that the optimal moisture content of corn field soil during corn growth is usually 75%-80%, therefore, it can be considered that the moisture content of corn field soil is always adjusted to this parameter range through adjustment.

[0127] However, for the above steps, the specific control principle can be described from the whole, and for this method, the specific implementation method needs to be described. Specifically:

[0128] S1341, when the corn field predicted moisture content is higher than the soil moisture content causing corn waterlogging damage, the moisture content fluctuation amount and the drainage speed of the water supply and drainage system corresponding to the predicted precipitation time are obtained.

[0129] The purpose of this step is that the corn field predicted moisture content has been obtained, and then the moisture content causing corn waterlogging damage is compared, which is used to obtain the moisture content adjustment parameter of the corn field soil, and further, to determine the basic drainage speed parameter needed to be set under the current moisture content fluctuation amount.

[0130] Wherein, after obtaining the water content fluctuation amount, the parameter is directly compared with the parameter interval which has been set, so as to obtain the drainage speed of the drainage system at the current water content fluctuation amount.

[0131] Wherein, for the drainage speed, the corresponding speed level can be directly set, such as the higher the level, the faster the speed of the water pump, and the higher the negative pressure in the drainage pipeline, the faster the drainage speed.

[0132] Wherein, the predicted precipitation time also needs to be determined, and the shorter the predicted precipitation time and the current time, the faster the drainage speed.

[0133] Wherein, for the established scheme, the predicted precipitation and the current time interval, and the water content fluctuation amount can be set as a data set, which can be represented as [Δt, ΔR], and for each interval, the corresponding drainage speed of the drainage system is set, so that the corresponding drainage speed of the drainage system can be directly obtained according to the set.

[0134] S1342, reduce the water content of the corn field soil based on the drainage speed, and obtain the drainage amount of the corn field soil in real time after the drainage system runs.

[0135] The purpose of this step is that when the water content of the corn field soil is adjusted, the drainage system can continue to drain based on the drainage system, and the water content of the corn field soil will change in real time during the drainage process. In order to avoid the water content of the corn field soil being too low during the adjustment process, resulting in the need for subsequent water resource supplement, it is necessary to ensure that the real-time value change of the water content fluctuation amount adjusts the drainage speed of the drainage system.

[0136] Wherein, after obtaining the current water content of the corn field soil, the value is the total amount of the water content of the corn field soil which is reduced when the precipitation is reached.

[0137] Wherein, for the obtained drainage amount of the corn field soil, the total amount of the drained water can be obtained by continuous acquisition.

[0138] Wherein, for the total amount of the drained water, the reduction amount of the water content of the corn field soil in the current drainage process can be determined according to the total amount of the drained water and the volume of the corn field soil.

[0139] Wherein, for the obtained drainage amount, the flow or volume of the drained water resource in the drainage pipeline can be determined by continuous measurement.

[0140] S1343, based on the drainage amount of the corn field soil, obtain the remaining amount of the water content fluctuation amount, and adjust the drainage speed of the drainage system in real time based on the predicted precipitation time, until the soil water content at non-precipitation time.

[0141] The purpose of this step is to avoid over-adjustment of the moisture content of the soil in the process of adjusting the moisture content of the soil in the corn field, so in the specific process, the real-time adjustment of the drainage speed is carried out according to the remaining amount of the fluctuation amount, and overall, the longer the drainage time is, the lower the drainage speed is, so that the moisture content of the soil in the corn field can be reasonably adjusted.

[0142] Among them, the decrease of the moisture content of the soil in the corn field is removed from the moisture content fluctuation amount, and the remaining amount of the moisture content fluctuation amount is obtained.

[0143] Among them, based on the obtained real-time drainage amount, the moisture content of the soil in the corn field corresponding to the drainage amount can be obtained.

[0144] Among them, the moisture content of the soil in the corn field corresponding to the drainage amount is removed from the moisture content fluctuation amount, and the new moisture content fluctuation amount is obtained.

[0145] Among them, the difference between the time node after drainage and the time node of predicted precipitation is obtained, and the new time interval is obtained, and the two values are set to the same set according to the method mentioned above, and the drainage speed of the drainage system is determined based on the data of the set.

[0146] Among them, for the obtained drainage speed of the drainage system, the obtained time interval and the remaining amount of the moisture content fluctuation amount are needed to adjust the drainage speed of the drainage system in real time.

[0147] The beneficial effect of step S130 is that in the process of reducing corn waterlogging damage, the basic work content is to determine the precipitation prediction in the future time period, and the moisture content of the soil in the corn field is adjusted in advance based on the prediction result, so that when the precipitation is too large, the drainage buffer period can be provided, and when the precipitation is small, the moisture content can be adjusted in advance to ensure that the actual precipitation does not need to be adjusted in real time.

[0148] But in step S130, the basis is that the weather prediction must be accurate, but in actual production, it is found that the current weather prediction is difficult to achieve extremely accurate determination, mainly manifested as that the prediction of whether it will rain in the future is relatively accurate, but the prediction accuracy of the amount of precipitation is insufficient, which easily leads to unreasonable adjustment of the moisture content of the soil in the corn field, and in some cases, whether it will rain is also not accurately predicted, so when the specific drainage operation is carried out, corresponding means need to be set for the inaccurate prediction. Specifically:

[0149] S135, updating the weather data in the future time in real time to obtain the corrected future time predicted precipitation.

[0150] The purpose of this step is to update the weather data in real time in the field of agriculture, so in the specific processing, the predicted precipitation data can also be updated in real time to obtain the accuracy of the predicted precipitation, so that the working state of the water supply and drainage system can be reasonably adjusted according to the weather prediction after entering the drainage program.

[0151] The weather data in the future time is updated in real time, which can be determined by the information published by the local weather station in the Internet.

[0152] The weather data in the future time can also be determined according to the monitoring device arranged in the corn field area, such as monitoring the air humidity and temperature of the corn field area, to determine whether it will really rain in the future time.

[0153] The predicted precipitation in the future time has been determined, and the accuracy of the future time predicted precipitation needs to be determined based on the updated weather data in the future time.

[0154] When the accuracy of the future time predicted precipitation is found to be insufficient, a new future time predicted precipitation is obtained based on the updated weather data in the future time, which is the new predicted value of the precipitation.

[0155] The more accurate future time predicted precipitation refers to the result of the future time predicted precipitation obtained based on the updated weather data in the future time after the operation of the water supply and drainage system.

[0156] S136, based on the accuracy of the corrected future time predicted precipitation, adjusting the drainage speed of the water supply and drainage system obtained by real-time adjustment to obtain the adjusted drainage speed.

[0157] The purpose of this step is to further adjust the drainage speed based on the result of the future time predicted precipitation, so as to increase or decrease the drainage speed.

[0158] The method for determining the adjusted drainage speed is the same as that of steps S131-S134, which will not be described here.

[0159] The method is used because after obtaining the predicted precipitation at the future time, the closer the prediction occurs to the time point, the higher the prediction accuracy obtained, so that the real-time correction method of the future time predicted precipitation can gradually approach whether the precipitation occurs at the prediction time point and the actual value of the precipitation.

[0160] S137, adjust the water content of the corn field soil based on the adjusted drainage speed.

[0161] The purpose of this step is to obtain the adjusted drainage speed, and then adjust the drainage of the corn field soil according to the result.

[0162] The method of adjusting the water content of the corn field soil is the same as that of step S134, which will not be repeated here.

[0163] S138, when the corrected future time predicted precipitation and the deviation degree of the future time predicted precipitation are not in the preset deviation degree interval, the drainage system stops draining and supplies water to the corn field soil, or the drainage speed of the drainage system is increased.

[0164] The purpose of this step is to determine the analysis result of whether the drainage system is running and whether it continues to operate, so as to determine the water supply to the corn field soil or the drainage operation according to the determination result.

[0165] The corrected future time predicted precipitation can be used to calculate the deviation degree with the future time predicted precipitation that has been obtained, and the calculation equation of the deviation degree is:

[0166] ,

[0167] Where δ represents the deviation degree; P c represents the corrected future time predicted precipitation; P s represents the future time predicted precipitation, which is the predicted precipitation obtained when the first prediction of the future time precipitation occurs.

[0168] After obtaining the deviation degree based on the above equation, the obtained value is compared with the preset deviation degree.

[0169] The preset deviation degree interval can be set based on the experience of technicians, or the mean value of the two types of values of the deviation degree, which are positive and negative, can be obtained according to the historical data, and then the two obtained positive and negative values are used as the two end point values of the preset deviation degree interval.

[0170] In some embodiments, the obtained interval can be divided into two categories, namely two intervals of positive and negative numbers respectively.

[0171] Wherein, when it is found that the actual obtained deviation degree is not in the preset deviation degree interval, it is determined that the positive and negative numbers of the deviation degree.

[0172] Wherein, when it is determined that the deviation degree is positive and not in the preset deviation degree interval, it is considered that the corrected future time precipitation is higher than the future time precipitation, and the drainage speed determined based on the future time precipitation cannot meet the requirement of lowering the moisture content of the corn soil, so the drainage speed of the drainage system is increased.

[0173] Wherein, when it is determined that the deviation degree is negative and not in the preset deviation degree interval, it is considered that the corrected future time precipitation is lower than the future time precipitation, and the drainage speed determined based on the future time precipitation is too high, which will cause the moisture content of the corn field soil to be too low when the predicted precipitation time is reached, so the drainage system needs to stop draining and water is supplied to the corn field soil.

[0174] In some embodiments, for the working condition of stopping the drainage of the drainage system and supplying water to the corn field soil, the working condition needs to be temporarily stopped from draining and temporarily not supplying water to the corn field, only when it is determined that there will be no precipitation in the future time, or the precipitation amount will not cause the corn to be damaged by waterlogging at the current moisture content, the drainage is completely stopped, and whether to supply water to the corn field soil is determined according to the actual situation.

[0175] Wherein, the water supply working condition is involved because in the operation of the technical solution of the present application, when it is considered that there will be precipitation in the future time, the drainage operation is performed, which will cause the moisture content of the corn field soil to decrease, but when it is found that there will be no precipitation, the drained water resources need to be supplemented to ensure that the moisture content of the corn field soil is always in the most suitable state for the growth of corn.

[0176] As described in step S140, the purpose of this step is to ensure that the moisture content of the corn field soil will not be in the moisture content condition that will cause the corn to be damaged by waterlogging during precipitation, so it is necessary to determine the drainage demand of the corn field during actual precipitation, and then adjust the drainage speed of the drainage system based on the demand data to adjust the moisture content of the corn field soil. Specifically:

[0177] S141, based on the soil moisture content sensor arranged in the corn field, the soil moisture content of the corn field is obtained in real time to obtain the measured soil moisture content of the corn field.

[0178] The purpose of this step is that in the corn field soil, during the plowing period, the drainage pipeline can be buried in each planting cycle, and various sensors can be arranged in the corn field soil. The soil moisture sensor can be arranged in the corn field soil. Based on the sensor, the real-time soil moisture of the corn field soil during precipitation can be determined.

[0179] In the corn field soil, the real-time acquisition of the moisture content can be performed.

[0180] In the calculation of the moisture content of the corn field soil, the sensors are uniformly arranged in the corn field area, and the average value of the moisture content of the sensors is calculated. The result obtained is the measured soil moisture of the corn field.

[0181] S142, when the measured soil moisture of the corn field is not less than the soil moisture causing corn waterlogging damage, the drainage requirement of the corn field is true.

[0182] The purpose of this step is that although in the current technical solution, it is theoretically believed that the advance adjustment of the moisture content of the corn field soil can be reasonably ensured to a large extent, but from the practical results, in some cases, the measured moisture content parameter of the corn field area shows that even if the corn field soil has been adjusted in advance, the measured moisture content of the corn field soil is not less than the soil moisture causing corn waterlogging damage after a period of time, so as to determine whether the corn field needs to be drained during precipitation.

[0183] During precipitation, the real-time moisture content of the corn field soil is compared with the soil moisture causing corn waterlogging damage.

[0184] When the obtained moisture content of the corn field soil is higher than the soil moisture causing corn waterlogging damage, it is considered that the corn field needs to be drained, that is, the drainage requirement is true.

[0185] S143, when the measured soil moisture of the corn field is less than the soil moisture causing corn waterlogging damage, the drainage requirement of the corn field is false.

[0186] The purpose of this step is that in some cases, the analysis result of the future predicted precipitation of the corn field soil is accurate enough, and the result obtained can be determined according to the analysis result. At this time, no additional drainage is needed during precipitation, and only the processing of the advance drainage operation is needed. Therefore, this situation needs to be discussed.

[0187] During precipitation, the real-time moisture content of the corn field soil is compared with the soil moisture causing corn waterlogging damage.

[0188] If the obtained water content of the cornfield soil is not higher than the water content of the soil causing corn waterlogging damage, it is considered that the cornfield does not need to be drained, i.e., the drainage demand is false.

[0189] The beneficial effect of step S140 is that after the real occurrence of precipitation in the cornfield area, the soil water content needs to be obtained in real time, and whether further drainage operation is needed can be analyzed according to the result of the water content, so that whether the subsequent drainage system operates and the calculation of the drainage speed is laid a foundation by analyzing the true or false of the drainage demand of the cornfield.

[0190] As described in step S150, the purpose of this step is that when it is determined that the cornfield needs to be drained, the change speed of the water content of the cornfield soil caused by the precipitation speed is different, so in the specific processing, the change speed of the water content of the cornfield soil is also analyzed, and then the drainage speed level of the drainage system is determined according to the precipitation speed, i.e., the increase rate of the water content of the cornfield soil. Specifically:

[0191] S151, when the drainage demand of the cornfield is true, obtaining the real-time value of the water content of the cornfield soil from the start of the precipitation to the time point when it is determined that the drainage demand of the cornfield is true.

[0192] The purpose of this step is that when it is determined that the water content of the cornfield soil needs to be decreased, the system needs to determine the precipitation speed in the next period of time, and then the drainage speed can be determined based on the speed parameter. For the determination of the drainage speed, the real-time data of the water content needs to be obtained, so that the drainage speed can be determined based on the data.

[0193] Wherein, when it is determined that the drainage demand is true, it is determined that the current water content of the cornfield soil has caused corn waterlogging damage.

[0194] Wherein, when it is found that the drainage demand is true, all the real-time values of the water content obtained from the start of the precipitation to the time period when this information is found are obtained.

[0195] Wherein, all the obtained values need to be recorded, so as to determine whether drainage is needed during the precipitation.

[0196] It should be noted that the real-time value of the water content of the cornfield soil in step S151 refers to all the values of the water content of the cornfield soil obtained from the start of the precipitation in the cornfield area to the time point when the water content of the cornfield soil causes corn waterlogging damage.

[0197] The purpose of this step is to predict the moisture content change based on the existing data when it is considered that the corn field soil needs to be drained during rainfall, that is, to construct the moisture content change curve based on real-time data to make data prediction.

[0198] In this step, the time point and the corresponding moisture content at the time point are established into a curve for the obtained moisture content data of the corn field soil.

[0199] In this step, the moisture content change curve is obtained, and the fitting area can be directly found from the curve, and then the curve is decomposed according to the fitting combination.

[0200] In some embodiments, the data in the curve can be segmented according to the time point based on the moisture content change of the corn field soil. For example, during the initial rainfall period, the moisture content of the corn field soil is low, and the moisture content change value as a whole shows a linear growth state, while after a period of rainfall, the moisture content of the corn field soil is more similar to a logarithmic function curve growth state, and the moisture content has an upper limit.

[0201] In this step, the moisture content change equation of the corn field soil in each time interval segment in the curve is determined.

[0202] In some embodiments, only the moisture content of the corn field soil that can cause corn waterlogging damage and the moisture content in the period before that can be determined, and these moisture content data belong to the same equation. All data in the time period before that are excluded and no longer considered.

[0203] S153, obtaining the drainage speed level of the drainage system of the corn field soil from the moisture content change curve of the corn field soil.

[0204] The purpose of this step is to determine the change speed of the moisture content based on the data information in the curve after the moisture content change curve of the corn field soil has been determined, and then to set the drainage speed level of the drainage system of the corn field soil according to the parameter.

[0205] In this step, all moisture content change equations in the curve are obtained after the moisture content change curve of the corn field soil is obtained.

[0206] In this step, the moisture content of the corn field soil is monitored in real time, and the monitoring result and the independent variable value range of different equations in the moisture content change curve of the corn field soil are obtained, and then the moisture content change equation in the range is determined according to the value position. For example, for the moisture content change curve of the corn field soil during a certain period of rainfall, the equation form established for the curve is:

[0207] ,

[0208] wherein R represents the moisture content of the cornfield soil determined based on the equation, and in fact the real-time value of the moisture content of the cornfield soil when failing to reach the moisture content triggering the corn waterlogging damage; a1-a3, b1-b3 and c are parameters in the equation group; t represents the detection time of the moisture content; t0-t3 represent time points, and t3 represents the detection time when the moisture content of the cornfield soil reaches the moisture content triggering the corn waterlogging damage.

[0209] wherein the drainage speed of the drainage system is determined according to the change equation of the moisture content, and specifically, the change speed of the moisture content can be determined based on the derivative of each moisture content change equation.

[0210] wherein the value range of each equation in the above equation is also required as the definition range in the moisture content change equation group of the cornfield soil, and the change rate equation is:

[0211] ,

[0212] wherein v R represents the change rate of the moisture content of the cornfield soil.

[0213] wherein in the determination of the drainage speed level of the drainage system, the corresponding drainage speed level of the drainage system is determined according to the obtained change rate.

[0214] wherein for the so-called drainage speed level of the drainage system, the corresponding drainage speed level of the drainage system is directly determined based on the obtained moisture content change rate value according to the experience of the technical personnel or the historical adjustment scheme, and the corresponding drainage speed of the drainage system is directly obtained based on the level data and adjusted.

[0215] wherein the moisture content of the cornfield soil is obtained in real time and compared with the definition range of R in the change rate equation to determine the definition range of the moisture content of the cornfield soil, so as to determine the corresponding change rate of the moisture content of the cornfield soil, and thus determine the drainage speed level of the drainage system according to the change rate.

[0216] The beneficial effect of step S150 is that by determining the change rate of the moisture content of the cornfield soil, the drainage speed level of the drainage system is determined when the rainfall really occurs and the moisture content of the cornfield soil triggers the corn waterlogging damage problem, so that the drainage system can reasonably set the drainage speed level of the drainage system based on the measured moisture content of the cornfield.

[0217] As step S160, the purpose of this step is that during the precipitation, the precipitation speed is actually easy to fluctuate, while the soil drainage pipeline drains water outward, which leads to the difficulty in confirming the drainage speed according to the predicted precipitation or the measured precipitation, so in this case, after determining the drainage speed level based on step S150, the real-time moisture content needs to be further obtained, so as to fine-tune the drainage speed of the drainage system to better match the drainage demand.

[0218] S161, obtaining the real-time moisture content of the cornfield soil during the drainage period of the cornfield soil under the condition that the drainage system drains at the drainage speed level.

[0219] The purpose of this step is to determine whether the currently used drainage speed level is reasonable during the adjustment of the moisture content of the drainage system during the precipitation, which is obviously needed to be obtained according to the measured results, and based on the parameter to determine whether further adjustment of the drainage speed is needed, so the judgment basis data of the drainage speed needs to be obtained.

[0220] Among them, when the drainage system participates in the drainage work of the cornfield, the real-time moisture content of the cornfield soil is obtained, and the result is the real-time moisture content of the cornfield soil during the drainage period.

[0221] Among them, the real-time moisture content of the cornfield soil during the drainage period is obtained based on the moisture content monitoring sensor arranged in the cornfield soil.

[0222] S162, based on the real-time moisture content of the cornfield soil during the drainage period, obtaining the moisture content change rate of the cornfield soil within the drainage speed level adjustment detection time step of the drainage system.

[0223] The purpose of this step is to determine the evaluation value when further adjusting the drainage speed of the drainage system, so the purpose of this step is to determine the corresponding evaluation data.

[0224] Among them, after obtaining the real-time moisture content of the cornfield soil during the drainage period, the moisture content change rate value of the cornfield soil within the entire detection adjustment detection time step needs to be obtained.

[0225] Among them, the drainage speed level adjustment detection time of the drainage system refers to the time point of re-evaluating the drainage speed of the drainage system, and the corresponding time step is the interval time between two adjacent re-evaluation time points.

[0226] Among them, the detection time step can be set according to the actual situation, which is not limited in the present application.

[0227] Wherein, for the obtained water content rate change rate, the maximum and minimum values of the corn field soil water content rate in the irrigation and drainage system level adjustment time step can be directly obtained, and then the change rate of the two values is calculated.

[0228] S163, when the corn field soil water content rate change rate does not fall into the preset water content rate change rate interval, the irrigation and drainage system level adjustment level corresponding to the corn field soil water content rate change rate is obtained.

[0229] The purpose of this step is to determine whether the irrigation and drainage speed needs to be adjusted according to the corn field soil water content rate change rate.

[0230] Wherein, for the preset water content rate change rate interval, it can be set according to requirements, which is not limited in this application.

[0231] Wherein, for the obtained water content rate change rate, it is analyzed whether the obtained value falls into the preset water content rate change rate interval. If it does not fall into the interval, it is considered that the current irrigation and drainage system drainage speed and the corn field soil water content adjustment requirement do not match, and additional adjustment is needed.

[0232] Wherein, when the water content rate change rate is determined not to fall into the preset water content rate change rate interval, the maximum and minimum values of the water content rate change rate and the preset water content rate change rate interval are compared to determine whether the water content rate change rate is greater than the interval maximum value or less than the interval minimum value.

[0233] Wherein, when the water content rate change rate is less than the interval minimum value, the irrigation and drainage system drainage speed level needs to be improved, that is, the drainage speed is increased. Conversely, the irrigation and drainage system drainage speed level is lowered, that is, the drainage speed is reduced.

[0234] S164, based on the irrigation and drainage system level adjustment level, the irrigation and drainage system drainage speed level in the next irrigation and drainage system level adjustment time step is obtained.

[0235] The purpose of this step is to determine the irrigation and drainage system drainage speed level in the current detection time step after the irrigation and drainage system level adjustment level is determined.

[0236] Wherein, after the irrigation and drainage system drainage speed level is obtained, in the first irrigation and drainage system level adjustment time step, the irrigation and drainage system level adjustment level is obtained, and the irrigation and drainage system level adjustment level is added or subtracted from the irrigation and drainage system drainage speed level, and then the actual irrigation and drainage speed level is obtained.

[0237] In any one drainage speed level adjustment monitoring time step, the drainage system level adjustment grade needs to be determined, and then the drainage speed level of the drainage system corresponding to the drainage speed level adjustment monitoring time step is obtained by combining the drainage system level adjustment grade with the previous actual drainage speed level.

[0238] The beneficial effect of step S160 is that during the drainage speed adjustment process of the drainage system, it can be determined whether the set drainage speed is reasonable, and through the rationality judgment, i.e., the analysis of the moisture content rate change rate of the corn field soil, the obtained drainage speed level of the drainage system is further adjusted, so as to realize the real-time adjustment of the drainage speed level of the drainage system during the precipitation period, thereby ensuring that the automatically controlled drainage speed of the drainage system meets the accurate adjustment needs of the moisture content of the corn field soil.

[0239] As described in step S170, after precipitation, the moisture content of the corn field soil may also be in a state that is prone to cause waterlogging damage, especially short-term heavy precipitation. Regardless of the situation, water will accumulate in the corn field, and the corn root system will be damaged irreversibly after 48h in the soil with a moisture content of 100%. Therefore, for this situation, it is necessary to measure the moisture content of the corn field soil after precipitation and continuously and reasonably drain the soil, so as to ensure that the moisture content of the corn field soil after precipitation can reach the interval of 75%~80% in a short time, so that the corn is in the best state of the moisture content of the corn field soil. Specifically:

[0240] S171, after the end of precipitation, the real-time moisture content of the corn field soil is obtained, and the difference between the soil moisture content suitable for the growth of corn is obtained to obtain the moisture content adjustment target value.

[0241] The purpose of this step is to determine the adjustment target value of the moisture content of the corn field soil after the end of precipitation, and then determine the adjustment target of the moisture content based on the target value. This step is to obtain the value.

[0242] In which, directly obtain the measured moisture content of the corn field soil at the end of precipitation.

[0243] In which, after the end of precipitation, the real-time moisture content of the corn field soil corresponding to each data acquisition time point is obtained in real time, so as to obtain the moisture content value at the current time point.

[0244] In which, the difference between the real-time moisture content of the corn field soil and the soil moisture content suitable for the growth of corn is directly calculated, and the value is the moisture content adjustment target value.

[0245] S172, obtain the post-rainfall water content adjustment target value interval in which the water content adjustment target value is located, to obtain the drainage speed level of the post-rainfall water supply and drainage system.

[0246] The purpose of this step is to ensure that the drainage efficiency is high enough and to avoid excessive drainage of water resources, which may cause corn to lack water, when adjusting the water content of the corn field soil after rainfall. To meet these two needs, the drainage speed level of the post-rainfall water supply and drainage system can be adjusted.

[0247] The post-rainfall water content adjustment target value interval can be constructed according to actual needs.

[0248] Each post-rainfall water content adjustment target value interval corresponds to a drainage speed level value of the post-rainfall water supply and drainage system.

[0249] After obtaining the post-rainfall adjustment target value interval in which the water content adjustment target value is located, the drainage speed of the water supply and drainage system is adjusted based on the drainage speed level corresponding to the interval.

[0250] S173, based on the drainage speed level of the post-rainfall water supply and drainage system, post-rainfall drainage is performed on the corn field.

[0251] The purpose of this step is to appropriately drain the corn field after rainfall.

[0252] After obtaining the drainage speed level of the post-rainfall water supply and drainage system, the drainage speed of the water supply and drainage system is adjusted based on the value to perform drainage operation.

[0253] When the water content of the corn field soil reaches the water content at which the corn grows optimally, the water supply and drainage system stops draining water and functions as a water supply to the corn field soil, ensuring that the water content of the corn field soil is always optimal for corn growth.

[0254] The beneficial effect of step S170 is that the drainage speed level of the post-rainfall water supply and drainage system can be adjusted in real time according to the water content adjustment target value of the corn field soil after rainfall, thereby increasing the water content adjustment speed of the corn field soil after rainfall and avoiding excessive drainage, which may affect corn growth.

[0255] The beneficial effects of the present application are as follows:

[0256] 1. Improve the drainage speed of the soil in the corn field. In the technical solution of the application, by setting the water supply and drainage system, by burying the water supply and drainage pipeline in the soil, when the water content of the soil is found to be increased, drainage operation is immediately carried out to reduce the water content of the soil, so as to avoid that the corn root system stays in the soil with saturated water content for too long time, resulting in lack of oxygen for the corn root system.

[0257] 2. Realize the advance adjustment of the water content of the soil in the corn field. In the technical solution of the application, the water supply and drainage system can receive weather data in future time, can obtain the predicted precipitation in future time, and can analyze whether the corn will be damaged by waterlogging in this precipitation according to the predicted precipitation, if so, the excess water in the corn field is discharged in advance based on the water supply and drainage system to reduce the water content of the soil in the corn field, which can fully reserve the response time for the water supply and drainage system during precipitation, and for small range and small scale precipitation, the soil water content can be adjusted in advance to ensure that the soil water content will not cause waterlogging damage to the corn even during precipitation.

[0258] 3. Realize the whole process precise regulation and control of the water content of the soil in the corn field. In the technical solution of the application, the control process of the waterlogging damage of the corn field contains the whole process of the adjustment of the water content of the soil in the corn field before, during and after precipitation, so as to realize the whole process regulation and control of the soil, and for each regulation and control stage, the drainage speed of the water supply and drainage system is adjusted based on the soil water content parameter or change rate, so as to realize the precise regulation and control of the water content of the soil in the corn field.

[0259] 4. Realize the improvement of the resistance of corn to waterlogging damage. In the avoidance or reduction of the waterlogging damage of corn, one of the main measures is to use drip irrigation and other methods to maintain the water content of the soil, and the application sets the water supply and drainage system to supply water in non-precipitation weather, so as to keep the soil water content in a reasonable range, improve the health of the corn, and achieve effective resistance effect to waterlogging damage.

[0260] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by related hardware of computer program instructions. The aforementioned computer program can be stored in a nonvolatile storage medium, and when executed, the computer program executes steps including the above-mentioned method embodiments. Alternatively, the integrated units of the present application, if implemented in the form of software function modules and sold or used as independent products, can also be stored in a nonvolatile storage medium. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of a software product, which is stored in a nonvolatile storage medium and includes a number of instructions for causing an electronic device (which can be a personal computer, a server, a network device, etc.) to execute all or part of the methods described in the various embodiments of the present application.

[0261] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be encompassed within the protection scope of the present application.

Claims

1. A method for reducing the damage of corn by waterlogging, characterized by, The method comprises: setting a water supply and drainage system in the corn field to supply water for irrigation and drain accumulated water; acquiring weather data in a future time to obtain a future time predicted precipitation amount; adjusting the soil moisture content of the corn field during non-precipitation time by the water supply and drainage system based on the future time predicted precipitation amount; acquiring the drainage demand of the corn field in real time during precipitation; when the drainage demand of the corn field is true, acquiring the moisture content increase rate of the corn field soil and the drainage speed level of the water supply and drainage system; adjusting the drainage speed level of the water supply and drainage system during precipitation in real time based on the drainage speed level of the water supply and drainage system; when the precipitation ends and the water supply and drainage system is draining, acquiring the post-precipitation soil moisture content in real time and draining the soil of the corn field; after the soil moisture content of the corn field during non-precipitation time is adjusted by the water supply and drainage system based on the future time predicted precipitation amount, the method further comprises: updating the weather data in the future time in real time to obtain a corrected future time predicted precipitation amount; adjusting the drainage speed of the water supply and drainage system obtained by real-time adjustment based on the accuracy of the corrected future time predicted precipitation amount to obtain an adjusted drainage speed; adjusting the moisture content of the soil of the corn field based on the adjusted drainage speed; when the deviation degree of the corrected future time predicted precipitation amount and the future time predicted precipitation amount is not in a preset deviation degree interval, the water supply and drainage system stops draining and supplies water to the soil of the corn field, or the drainage speed of the water supply and drainage system is increased; when the drainage demand of the corn field is true, acquiring the moisture content increase rate of the corn field soil and the drainage speed level of the water supply and drainage system comprises: when the drainage demand of the corn field is true, acquiring the real-time value of the moisture content of the soil of the corn field from the start of precipitation to the time point when the drainage demand of the corn field is determined to be true; acquiring the moisture content change curve of the soil of the corn field based on the real-time data of the moisture content of the soil of the corn field; obtaining the drainage speed level of the water supply and drainage system from the moisture content change curve of the soil of the corn field; adjusting the drainage speed level of the water supply and drainage system during precipitation in real time based on the drainage speed level of the water supply and drainage system comprises: acquiring the real-time moisture content of the soil of the corn field during drainage under the condition that the water supply and drainage system is draining at the drainage speed level; acquiring the moisture content change rate of the soil of the corn field within the drainage speed level detection time step of the water supply and drainage system based on the real-time moisture content of the soil of the corn field during drainage; when the moisture content change rate of the soil of the corn field does not fall within a preset moisture content change rate interval, obtaining the water supply and drainage system level corresponding to the moisture content change rate of the soil of the corn field; based on the water supply and drainage system level, obtaining the drainage speed level of the water supply and drainage system within the next drainage speed level detection time step of the water supply and drainage system.

2. The method of claim 1, wherein the method is characterized by, the method comprises: setting a water supply and drainage system in the corn field to supply water for irrigation and drain accumulated water; The water supply and drainage pipe is buried in the furrow and ridge of the corn field, and through holes are uniformly arranged on the water supply and drainage pipe, and the through holes are used for water supply and drainage of the corn field; Water pumps are arranged at both ends of the water supply and drainage pipe, and the water pumps can supply water or pump water into the water supply and drainage pipe; The water supply and drainage pipe and the water pump constitute a water supply and drainage system and are controlled by a control system.

3. The method of claim 1, wherein the method is characterized by, The weather data in the future time is obtained to obtain the predicted precipitation in the future time, including: Obtaining weather prediction information in the future time to obtain precipitation forecast in the future time; Based on the precipitation forecast in the future time, the predicted precipitation in the future time is obtained.

4. The method of claim 1, wherein the method is characterized by, Based on the predicted precipitation in the future time, the soil moisture content of the corn field in the non-rainfall time is adjusted by the water supply and drainage system, including: Based on the soil moisture content monitoring sensor arranged in the corn field, the real-time soil moisture content of the corn field is obtained; Based on the predicted precipitation in the future time, the total amount of precipitation that the corn field can withstand is obtained, and the fluctuation amount of the soil moisture content caused by the predicted precipitation in the future time is obtained; Based on the real-time soil moisture content of the corn field and the fluctuation amount of the soil moisture content, the predicted soil moisture content of the corn field in the rainfall time is obtained; When the predicted soil moisture content of the corn field is not less than the soil moisture content that causes corn waterlogging damage, the water supply and drainage system performs drainage operation and adjusts the soil moisture content of the corn field in the non-rainfall time.

5. The method of claim 4, wherein the method is characterized by, When the predicted soil moisture content of the corn field is not less than the soil moisture content that causes corn waterlogging damage, the water supply and drainage system performs drainage operation and adjusts the soil moisture content of the corn field in the non-rainfall time, including: When the predicted soil moisture content of the corn field is higher than the soil moisture content that causes corn waterlogging damage, the fluctuation amount of the soil moisture content and the drainage speed of the water supply and drainage system corresponding to the predicted rainfall time are obtained; Based on the drainage speed, the soil moisture content of the corn field is reduced, and the discharged water amount of the corn field soil after the water supply and drainage system is operated is obtained in real time; Based on the discharged water amount of the corn field soil, the remaining amount of the fluctuation amount of the soil moisture content is obtained, and the drainage speed of the water supply and drainage system is adjusted in real time based on the predicted rainfall time until the soil moisture content in the non-rainfall time is reached.

6. The method of claim 1, wherein the method further comprises: Real-time drainage demand of the corn field in the rainfall time is obtained, including: Based on the soil moisture content sensor arranged in the corn field, the real-time soil moisture content of the corn field is obtained to obtain the measured soil moisture content of the corn field; When the measured soil moisture content of the corn field is not less than the soil moisture content that causes corn waterlogging damage, the drainage demand of the corn field is true; When the measured soil moisture content of the corn field is lower than the soil moisture content that causes corn waterlogging damage, the drainage demand of the corn field is false.

7. The method of claim 1, wherein the method is characterized by, After the rainfall ends and the water supply and drainage system is drained, the real-time soil moisture content after the rainfall is obtained, and the corn field soil is drained, including: After the rainfall ends, the real-time soil moisture content of the corn field is obtained, and the soil moisture content difference of the most suitable growth state of the corn is obtained to obtain the soil moisture content adjustment target value; The rainfall after the soil moisture content adjustment target value interval is obtained to obtain the drainage speed level of the water supply and drainage system after the rainfall; Based on the drainage speed grade of the drainage system after the precipitation, the corn field is drained after the precipitation.

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