Multi-water-source water-fertilizer balanced water-saving irrigation integrated management method and system

Abstract

The invention discloses a multi-water-source water-fertilizer balanced water-saving irrigation integrated management method and system, and relates to the technical field of irrigation management. The method comprises the following steps: analyzing the concentrations of various types of minerals in the shallow brackish water every day over the years to obtain a plurality of historical component stable periods of the shallow brackish water over the years and the daily concentration distribution states of the corresponding various types of minerals; taking the overlapped date time period of the historical component stable time period of the shallow brackish water over the years as a reference component stable time period; judging whether the date of the day is in any reference component stable period or not, and obtaining the concentration of various types of minerals in the shallow brackish water of the day; according to the average irrigation amount per mu required by crops and the target concentration of each type of mineral substances, the mixing proportion of the shallow brackish water and the fresh water in the current day and the addition amount of each fertilizer are obtained. Irrigation water suitable for crop growth is mixed and matched, and water-saving irrigation and fertilizer proportioning are achieved integrally.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of irrigation management, and particularly relates to a multi-water-source water-fertilizer balance water-saving irrigation integrated management method and system. BACKGROUND

[0002] The existing irrigation system mainly relies on a single water source (such as underground water or river water), and is difficult to integrate rainwater, reclaimed water, and brackish water, resulting in poor drought resistance and resource waste. The differences in water quality (such as salt content and pH value) of different water sources are not dynamically regulated, and direct irrigation may cause soil salinization or decrease in fertilizer effectiveness. The traditional method relies on experience to set fixed irrigation amount and fertilizer concentration, and cannot be adjusted in real time according to the growth stage of crops, soil moisture, and meteorological conditions, resulting in excessive or insufficient water and fertilizer. The existing irrigation equipment is mainly controlled by time or manually, and lacks real-time monitoring and feedback of soil humidity, crop water requirement, and environmental parameters, making it difficult to achieve precise water saving. SUMMARY

[0003] The application aims to provide a multi-water-source water-fertilizer balance water-saving irrigation integrated management method and system, which dynamically estimates shallow brackish water, mixes and matches irrigation water suitable for crop growth, and integrally solves water-saving irrigation and fertilizer ratio.

[0004] To solve the above technical problems, the application is implemented by the following technical scheme:

[0005] The application provides a multi-water-source water-fertilizer balance water-saving irrigation integrated management method, which comprises,

[0006] obtaining detection records and extracting the concentration of various types of minerals in shallow brackish water every day in previous years;

[0007] analyzing the concentration of various types of minerals in shallow brackish water every day in previous years to obtain a plurality of historical composition stable periods of shallow brackish water in previous years and the daily concentration distribution state of various types of minerals corresponding thereto;

[0008] taking the overlapping date period of the historical composition stable periods of shallow brackish water in previous years as a reference composition stable period;

[0009] judging whether the date of the day is in any of the reference composition stable periods;

[0010] If not, a shallow brackish water sample is extracted every day to detect the concentration of various types of minerals in the shallow brackish water of the day

[0011] If yes, a shallow brackish water sample is extracted on the starting day of the reference composition stable period to detect, and the daily concentration distribution state of various types of minerals corresponding to the reference composition stable period is corrected to obtain the concentration of various types of minerals in the shallow brackish water of the day.

[0012] According to the average irrigation amount per mu required by crops and the target concentration of each type of mineral, the mixing ratio of the shallow brackish water mixed with fresh water on the current day and the addition amount of each fertilizer are obtained.

[0013] The application also discloses a multi-water-source water-fertilizer balance water-saving irrigation integrated management method, which comprises the following steps of,

[0014] receiving the mixing ratio of the shallow brackish water mixed with fresh water on the current day and the addition amount of each fertilizer;

[0015] controlling the irrigation unit to perform water-fertilizer integrated irrigation according to the mixing ratio of the shallow brackish water mixed with fresh water on the current day and the addition amount of each fertilizer.

[0016] The application also discloses a multi-water-source water-fertilizer balance water-saving irrigation integrated management system, which comprises,

[0017] The collection unit is used for detecting the concentration of various types of minerals in the shallow brackish water.

[0018] The mixing balance unit is used for obtaining the detection record and extracting the concentration of various types of minerals in the shallow brackish water on each day in the past years.

[0019] The concentration of various types of minerals in the shallow brackish water on each day in the past years is analyzed to obtain a plurality of historical composition stable time periods of the shallow brackish water in the past years and the daily concentration distribution state of various types of minerals corresponding to the historical composition stable time periods.

[0020] The overlapping date period of the historical composition stable time periods of the shallow brackish water in the past years is taken as a reference composition stable time period.

[0021] It is judged whether the date of the current day is in any of the reference composition stable time periods.

[0022] If not, the shallow brackish water sample on the current day is extracted for detection to obtain the concentration of various types of minerals in the shallow brackish water on the current day.

[0023] If yes, the shallow brackish water sample is extracted on the starting day of the reference composition stable time period for detection, and the daily concentration distribution state of various types of minerals corresponding to the reference composition stable time period is corrected to obtain the concentration of various types of minerals in the shallow brackish water on the current day.

[0024] According to the average irrigation amount per mu required by crops and the target concentration of each type of mineral, the mixing ratio of the shallow brackish water mixed with fresh water on the current day and the addition amount of each fertilizer are obtained.

[0025] The irrigation unit is used for receiving the mixing ratio of the shallow brackish water mixed with fresh water on the current day and the addition amount of each fertilizer.

[0026] According to the mixing ratio of the shallow brackish water mixed with fresh water on the day and the adding amount of each fertilizer, the irrigation unit is controlled to carry out water and fertilizer integrated irrigation.

[0027] The present application analyzes the detection record by the mixing balance unit, obtains the historical component stable period of the shallow brackish water in the past years, and obtains the reference component stable period available this year. The shallow brackish water on the starting day of the reference component stable period is detected once, and the component concentration of the shallow brackish water on each day in the whole reference component stable period can be accurately estimated. The present application dynamically estimates the shallow brackish water, mixes and matches the irrigation water suitable for crop growth, and integrally solves the problems of water-saving irrigation and fertilizer ratio.

[0028] Of course, implementing any product of the present application does not necessarily need to achieve all the advantages described above at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed for the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0030] Figure 1 The function unit and information flow direction schematic diagram of the multi-water source water and fertilizer balance water-saving irrigation integrated management system according to an embodiment of the present application;

[0031] Figure 2 The step flowchart schematic diagram of the mixing balance unit according to an embodiment of the present application;

[0032] Figure 3 The generation schematic diagram of the reference component stable period according to the present application;

[0033] Figure 4 The step flowchart schematic diagram of the irrigation unit according to an embodiment of the present application;

[0034] Figure 5 The step flowchart schematic diagram of the step S2 according to an embodiment of the present application;

[0035] Figure 6 The step flowchart schematic diagram of the step S21 according to an embodiment of the present application;

[0036] Figure 7 The step flowchart schematic diagram of the step S7 according to an embodiment of the present application;

[0037] In the drawings, the component list represented by each number is as follows:

[0038] 1 - collection unit, 2 - mixing balance unit, 3 - irrigation unit. DETAILED DESCRIPTION

[0039] For the purpose of the present application, technical solutions and advantages, the following will be further described in detail with the help of the accompanying drawings.

[0040] It should be noted that the terms "first", "second" and the like in the present application are used to distinguish similar objects, and do not necessarily have to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0041] The collected fresh water such as rainwater, deep water, river water, etc. can be mixed with shallow brackish water to obtain mixed water suitable for crop growth. At the same time, since the shallow brackish water receives the fertilizer infiltrated from the surface, it has some mineral elements beneficial to crop growth, such as potassium salt and nitrate salt, so that appropriate use of shallow brackish water not only saves fresh water resources, but also solves the problem of fertilizer. However, the concentration (usually referred to as total dissolved solids TDS or salt content) of shallow brackish water may change dynamically over time, and its volatility is mainly affected by precipitation and temperature. For example, the seasonal variation of shallow brackish water TDS in the North China Plain can range from 500 to 3000 mg / L. In order to avoid frequent water quality detection, the local shallow brackish water can be accurately estimated by combining the geological history detection record, see the following operation steps.

[0042] Referring to Figures 1 to 4 As shown in the figure, the present application provides a multi-water source water and fertilizer balance water-saving irrigation integrated management system, which is divided into collection unit 1, mixing balance unit 2 and irrigation unit 3 from the functional unit. The collection unit 1 is usually the geological detection record obtained by geological exploration institutions, and then the mixing balance unit 2 combines the crop demand analysis to obtain the mixing ratio of shallow brackish water and fresh water on the same day and the addition amount of each fertilizer, and the irrigation unit 3 performs the mixing irrigation task.

[0043] The collection unit 1 in the present scheme can be a specific detection device, or a data interface for extracting the geological detection record, the purpose of which is to obtain the concentration of various types of minerals in the shallow brackish water; the types of minerals include any of sodium chloride, calcium chloride, magnesium chloride, potassium chloride, sodium sulfate, magnesium sulfate, sodium carbonate and sodium bicarbonate, and of course other mineral species can also be added according to the demand.

[0044] Referring toFigure 2 and 5 As shown in FIG. 1, the mixed balance unit 2 in the present solution can first execute step S1 to obtain the detection records, and extract the concentrations of various types of minerals in the shallow brackish water on each day in the past years. Next, step S2 can be executed to analyze the concentrations of various types of minerals in the shallow brackish water on each day in the past years to obtain several historical composition stable periods of the shallow brackish water in the past years and the daily concentration distribution states of various types of minerals corresponding to the historical composition stable periods. Specifically, step S21 can be executed to, for each year in the detection records, take the dates with consistent mineral concentration states in the year as the historical composition stable period of the year, and obtain the concentrations of various types of minerals in the shallow brackish water on each day in the historical composition stable period. Next, step S22 can be executed to obtain the historical composition stable period in each year in the detection records, and take the concentrations of various types of minerals in the shallow brackish water on each day in the historical composition stable period as the daily concentration distribution state of various types of minerals in the historical composition stable period.

[0045] As shown in FIG. 1, the mixed balance unit 2 in the present solution can first execute step S1 to obtain the detection records, and extract the concentrations of various types of minerals in the shallow brackish water on each day in the past years. Next, step S2 can be executed to analyze the concentrations of various types of minerals in the shallow brackish water on each day in the past years to obtain several historical composition stable periods of the shallow brackish water in the past years and the daily concentration distribution states of various types of minerals corresponding to the historical composition stable periods. Specifically, step S21 can be executed to, for each year in the detection records, take the dates with consistent mineral concentration states in the year as the historical composition stable period of the year, and obtain the concentrations of various types of minerals in the shallow brackish water on each day in the historical composition stable period. Next, step S22 can be executed to obtain the historical composition stable period in each year in the detection records, and take the concentrations of various types of minerals in the shallow brackish water on each day in the historical composition stable period as the daily concentration distribution state of various types of minerals in the historical composition stable period. Figure 5 and 6 As shown in FIG. 1, the mixed balance unit 2 in the present solution can first execute step S1 to obtain the detection records, and extract the concentrations of various types of minerals in the shallow brackish water on each day in the past years. Next, step S2 can be executed to analyze the concentrations of various types of minerals in the shallow brackish water on each day in the past years to obtain several historical composition stable periods of the shallow brackish water in the past years and the daily concentration distribution states of various types of minerals corresponding to the historical composition stable periods. Specifically, step S21 can be executed to, for each year in the detection records, take the dates with consistent mineral concentration states in the year as the historical composition stable period of the year, and obtain the concentrations of various types of minerals in the shallow brackish water on each day in the historical composition stable period. Next, step S22 can be executed to obtain the historical composition stable period in each year in the detection records, and take the concentrations of various types of minerals in the shallow brackish water on each day in the historical composition stable period as the daily concentration distribution state of various types of minerals in the historical composition stable period.

[0046] If more accurate and available historical composition stable periods are needed, new historical composition stable periods can also be generated through iterative optimization. Specifically, step S214 can be executed next to determine whether the dates included in each of the currently obtained historical composition stable periods are continuous. If yes, it means that each of the historical composition stable periods is more accurate and available, and thus step S215 can be executed next to obtain the historical composition stable period of the year.

[0047] If the judgment in step S214 is no, it means that the historical component stable period at this time has room for improvement, so the representative day needs to be reselected. The following steps are performed for each historical component stable period. First, step S216 is performed to determine whether the dates included in the historical component stable period are continuous. If yes, step S217 is performed to keep the representative day unchanged. If no, step S218 is performed to select the target sub-period with the most dates from the multiple sub-periods in the historical component stable period.

[0048] Generally, the median value of the dates in the historical component stable period can represent the shallow brackish water state of the target sub-period, and the target sub-period can also represent the shallow brackish water state of the target sub-period because it contains the most dates. To integrate both factors, step S219 is performed to calculate the average date of all dates included in the historical component stable period. However, there may be cases where the median value of the dates is not in the target sub-period, so a judgment needs to be made. If the average date is in the target sub-period, the average date is selected as the reselected representative day. If the average date is not in the target sub-period, the date in the target sub-period that is closest in time to the average date is selected as the reselected representative day. In this way, both factors mentioned above are taken into account to obtain a more accurate representative day.

[0049] After the reselected representative day is obtained, steps S212 to S215 are performed to redivide the historical component stable period according to the reselected representative day, and step S216 is performed to determine whether the dates included in each historical component stable period obtained are continuous, until the historical component stable period for the year is obtained.

[0050] To supplement the implementation process of steps S211 to S219 described above, the source code of some functional modules is provided, and the explanation is given in the comment section. To avoid data leakage involving geological confidential information, some data that do not affect the implementation of the scheme are desensitized, and the same applies below.

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[0065] The above functional module implements an algorithm for identifying stable water quality periods based on representative day selection and continuous period optimization. During operation, the water period is first divided into different periods, supporting separate treatment for dry and wet periods to ensure that seasonal changes do not affect stability analysis. Next, a representative day selection mechanism is implemented, evenly selecting multiple representative days (default is 3) for each water period. The similarity of the dates is measured by the degree of differentiation of mineral concentration (cumulative absolute difference). An initial division is then performed, assigning non-representative days to the representative day period with the lowest differentiation. Continuity checks are performed to ensure that the dates within each period are continuous. Iterative optimization is then continued, automatically adjusting the representative days until all periods are continuous or the maximum number of iterations is reached. Intelligent representative day adjustment is performed during the iteration process, selecting the most representative date based on the average date theory, and prioritizing the selection of new representative days within the largest continuous sub-period.

[0066] This algorithm is particularly well-suited for processing seasonally varying water quality data. Through rigorous continuity checks and an iterative optimization process, it accurately identifies periods of truly stable water quality, providing a reliable basis for subsequent irrigation decisions. Compared to simple statistical methods, this algorithm, based on representative days and continuity, better reflects the physical laws of actual water quality variation.

[0067] See also Figure 2 and 4 As shown, after completing the analysis of the historical component stability period of shallow brackish water over the years, the next step can be to perform step S3 and use the overlapping date period of the historical component stability period of shallow brackish water in the past years as the reference component stability period. Figure 4In the middle, the overlapping part of the historical composition stable period in 2022-2024 is taken as the reference composition stable period in 2025, which can be regarded as the consistency of the distribution state of the concentration of each type of mineral in the shallow brackish water in the reference composition stable period in 2025 with that in 2022-2024.

[0068] Next, step S4 can be performed to determine whether the date of the day is in any reference composition stable period. If not, it means that there is no reference composition stable period available for reference on the day, so step S5 can be performed to extract a shallow brackish water sample every day to detect the concentration of each type of mineral in the shallow brackish water on the day.

[0069] Please refer to Figure 2 and 7 If the result of step S4 is yes, it means that the reference composition stable period is available for reference, so step S6 can be performed to extract a shallow brackish water sample on the starting day of the reference composition stable period for detection, and step S7 can be performed to correct the daily concentration distribution state of each type of mineral corresponding to the reference composition stable period to obtain the concentration of each type of mineral in the shallow brackish water on the day.

[0070] Next, step S71 can be performed to obtain the interval days between the day and the representative day in each historical composition stable period corresponding to the reference composition stable period, and take the ratio of the total days of the historical composition stable period to the interval days as the correction coefficient of the historical composition stable period. Next, step S72 can be performed to calculate the weighted mean of the concentration of each type of mineral in the shallow brackish water on each day in each historical composition stable period corresponding to the reference composition stable period according to the correction coefficient of each historical composition stable period to obtain the reference concentration of each type of mineral in the shallow brackish water on each day in the reference composition stable period. Next, step S73 can be performed to calculate the difference between the concentration of each type of mineral in the shallow brackish water obtained by extracting a shallow brackish water sample on the starting day of the reference composition stable period for detection and the reference concentration of each type of mineral in the shallow brackish water on the starting day of the reference composition stable period to obtain the concentration correction difference of each type of mineral. Next, step S74 can be performed to superimpose the reference concentration of each type of mineral in the shallow brackish water on each day in the reference composition stable period and the concentration correction difference of each type of mineral to obtain the estimated concentration of each type of mineral in the shallow brackish water on each day in the reference composition stable period. Finally, step S75 can be performed to take the estimated concentration of each type of mineral in the shallow brackish water on the day in the reference composition stable period as the concentration of each type of mineral in the shallow brackish water on the day.

[0071] Please continue to refer to Figure 1 and2 After the concentration of each type of mineral in the shallow brackish water of the day is obtained, the next step S8 can be performed to obtain the mixing ratio of the shallow brackish water of the day mixed with fresh water and the addition amount of each fertilizer according to the average irrigation amount per mu required by the crop and the target concentration of each type of mineral.

[0072] Please continue to see Figures 1 to 3 After the mixing balance unit 2 analyzes the mixing ratio of the shallow brackish water of the day mixed with fresh water and the addition amount of each fertilizer, the irrigation unit 3 can perform step S031 to receive the information, and the next step S032 can be performed to control the irrigation unit to perform water and fertilizer integrated irrigation according to the mixing ratio of the shallow brackish water of the day mixed with fresh water and the addition amount of each fertilizer.

[0073] The flowcharts and block diagrams in the drawings show the possible implementation architecture, function and operation of the apparatus, system, method and computer program product according to the embodiments of the present application. In this regard, each block in the flowchart or block diagram can represent a module, a program segment or a part of instructions, which contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions noted in the blocks can also occur in different order from that noted in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can also be executed in reverse order, depending on the functions involved.

[0074] It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by hardware, such as a circuit or an ASIC (Application Specific Integrated Circuit), which performs the corresponding function or action, or can be implemented by a combination of hardware and software, such as firmware, etc.

[0075] Although the present application is described herein in conjunction with various embodiments, other variations of the disclosed embodiments can be understood and implemented by those skilled in the art with reference to the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "one" does not exclude a plurality. A single processor or other unit can implement several functions listed in the claims. Measures described in mutually different dependent claims can be combined and can produce good results.

[0076] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope of the described embodiments. Use of the terms "preferably," "preferred," "desired," etc., are intended to present a choice between one embodiment and another, and are not intended to limit the context in which the terms are used. The choice of terms is intended to best explain the principle, practical application or improvement over the technology in the field that the various embodiments are directed to, or to enable others skilled in the art to understand the various embodiments disclosed herein.

Claims

1. A multi-water source water-fertilizer balance water-saving irrigation integrated management method, comprising: Obtain test records and extract daily concentrations of various types of minerals in shallow brackish water over the years; It is characterized in that The concentrations of various types of minerals in shallow brackish water were analyzed daily over the years to obtain several historical stable composition periods of shallow brackish water and the corresponding daily concentration distributions of various types of minerals; The overlapping date periods of the historical composition stability periods of shallow brackish water in the past years were used as reference composition stability periods; Determining whether the current date is within any of the reference component stable periods; If not, shallow brackish water samples are collected daily to test the concentrations of various types of minerals in the shallow brackish water on that day; If so, shallow brackish water samples are collected for testing on the day when the reference component is stable, and the daily concentration distribution of various types of minerals corresponding to the reference component stability period is corrected to obtain the concentration of various types of minerals in the shallow brackish water on that day; According to the average irrigation amount per acre required by the crops and the target concentration of each type of mineral, the mixing ratio of shallow brackish water and fresh water and the addition amount of each fertilizer on that day were obtained.

2. The method according to claim 1, characterized in that Types of minerals include sodium chloride, calcium chloride, magnesium chloride, potassium chloride, sodium sulfate, magnesium sulfate, sodium carbonate, and / or sodium bicarbonate.

3. The method according to claim 1, characterized in that The step of analyzing the concentrations of various types of minerals in shallow brackish water every day over the years to obtain several historical stable composition periods of shallow brackish water over the years and the corresponding daily concentration distribution states of various types of minerals includes: For each year in the test records, the date when the mineral concentration status is consistent within the year is regarded as the historical composition stable period of the year, and the concentration of various types of minerals in shallow brackish water on a daily basis during the historical composition stable period is obtained; The historical composition stability period of each year in the detection record is obtained, and the concentration of various types of minerals in the shallow brackish water every day during the historical composition stability period is used as the daily concentration distribution state of various types of minerals in the historical composition stability period.

4. The method according to claim 3, characterized in that The step of taking the date when the mineral concentration state is consistent in each year in the detection record as the historical composition stable period of the year includes: For each year in the test record, perform the following steps: Select several representative days from each dry season and wet season of the year; The cumulative difference in concentration of various types of minerals in shallow brackish water between two days is used as the degree of differentiation of mineral concentration states between the two days. The degree of differentiation of mineral concentration states between each representative day and each non-representative day in the year is calculated. Each non-representative day and the representative day with the smallest differentiation in mineral concentration state are divided into the same historical composition stable period; Determine whether the dates included in the stable period of each historical component currently obtained are continuous; If so, the historical component stability period of that year is obtained; If not, reselect the representative day; The historical component stable period is re-divided based on the re-selected representative day, and it is determined whether the dates contained in each historical component stable period are continuous, until the historical component stable period of the year is obtained.

5. The method according to claim 4, characterized in that The step of reselecting a representative day includes: For each current stable period of historical components, perform the following steps: Determine whether the dates included in the stable period of the historical component are continuous; If so, keep the representative day within the stable period of the historical component unchanged; If not, then the sub-period with the most dates is selected from the multiple sub-periods of the historical component stability period as the target sub-period; Select a date within the target sub-period as the representative day.

6. The method according to claim 5, characterized in that The step of selecting a date as a representative day within the target sub-period includes: Calculate and obtain the average date of all dates included in the stable period of the historical component; If the average date falls within the target sub-period, the average date is used as the reselected representative day; If the average date is not within the target sub-period, the date with the shortest time interval between the average date and the target sub-period will be selected as the representative day.

7. The method according to claim 3, characterized in that The step of correcting the daily concentration distribution of various types of minerals corresponding to the stable period of the reference component to obtain the concentration of various types of minerals in the shallow brackish water on that day includes: For each historical component stable period corresponding to the reference component stable period on the current day, the correction coefficient of the historical component stable period is calculated based on the date distribution of the current day within each historical component stable period; The concentrations of various types of minerals in shallow brackish water during each historical component stable period corresponding to the reference component stable period on the day are weighted averaged according to the correction coefficient of each historical component stable period to obtain the reference concentrations of various types of minerals in shallow brackish water during the reference component stable period on the day; Calculate the difference between the concentration of each type of mineral in the shallow brackish water sampled on the starting day of the reference component stabilization period and the reference concentration of each type of mineral in the shallow brackish water on the starting day of the reference component stabilization period to obtain the corrected difference in concentration of each type of mineral; The estimated concentrations of various types of minerals in shallow brackish water during the stable period of the reference component on that day are obtained by superimposing the reference concentrations of various types of minerals in shallow brackish water during the stable period of the reference component on that day and the corrected differences in the concentrations of various types of minerals; The estimated concentrations of various types of minerals in the shallow brackish water on that day during the stable period of the reference composition on that day are taken as the concentrations of various types of minerals in the shallow brackish water on that day.

8. The method according to claim 7, characterized in that The step of calculating the correction coefficient of the historical component stable period according to the date distribution in each historical component stable period on the day for each historical component stable period corresponding to the reference component stable period on the day includes: For each historical component stable period corresponding to the reference component stable period of the current day, the number of days between the current day and the representative day in the historical component stable period is obtained, and the ratio of the total number of days in the historical component stable period to the number of days in the interval is used as the correction coefficient of the historical component stable period.

9. A multi-source water-fertilizer balanced water-saving irrigation integrated management method, characterized in that: include, Receiving the mixing ratio of shallow brackish water and fresh water on the same day and the addition amount of each fertilizer in the integrated management method for water-fertilizer balance and water-saving irrigation with multiple water sources according to any one of claims 1 to 8; The irrigation unit is controlled according to the mixing ratio of shallow brackish water and fresh water on that day and the addition amount of each fertilizer to carry out water-fertilizer integrated irrigation.

10. A multi-water source water-fertilizer balance water-saving irrigation integrated management system, characterized in that: include, The collection unit is used to detect the concentration of various types of minerals in shallow brackish water; Mixing balance unit, used to obtain test records and extract the concentrations of various types of minerals in shallow brackish water every day over the years; The concentrations of various types of minerals in shallow brackish water were analyzed daily over the years to obtain several historical stable composition periods of shallow brackish water and the corresponding daily concentration distributions of various types of minerals; The overlapping date periods of the historical composition stability periods of shallow brackish water in the past years were used as reference composition stability periods; Determining whether the current date is within any of the reference component stable periods; If not, shallow brackish water samples are collected daily to determine the concentration of various minerals in the shallow brackish water on that day. If so, shallow brackish water samples are collected for testing on the day when the reference component is stable, and the daily concentration distribution of various types of minerals corresponding to the reference component stability period is corrected to obtain the concentration of various types of minerals in the shallow brackish water on that day; According to the average irrigation amount per acre required by the crops and the target concentration of each type of mineral, the mixing ratio of shallow brackish water and fresh water and the amount of each fertilizer to be added on that day are obtained; Irrigation unit, which receives the mixing ratio of shallow brackish water to fresh water and the amount of each fertilizer to be added on that day; The irrigation unit is controlled according to the mixing ratio of shallow brackish water and fresh water on that day and the addition amount of each fertilizer to carry out water-fertilizer integrated irrigation.

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