CN110070278B - Method and device for determining minimum irrigation points of crops and server - Google Patents

Method and device for determining minimum irrigation points of crops and server Download PDF

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CN110070278B
CN110070278B CN201910286184.5A CN201910286184A CN110070278B CN 110070278 B CN110070278 B CN 110070278B CN 201910286184 A CN201910286184 A CN 201910286184A CN 110070278 B CN110070278 B CN 110070278B
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irrigation
soil
water consumption
layer
depth
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CN110070278A (en
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陈植炜
杨洪峰
王春香
徐杰
郜鹏
李昌
邓亚军
杨文韬
王明锁
安林
郭凯宣
梅晓云
毕志彦
刘琼
郝会香
叶榕
杨士辉
富佰成
高建国
韩晓东
付学军
路利娟
郭明珠
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Haonongyi E Commerce Co ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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Abstract

The application discloses a method and a device for determining the most unfavorable point of irrigation of crops and a server. Acquiring the maximum root depth of the crop according to the crop variety number and the planting area number; determining a field sustaining correction coefficient under a preset irrigation condition, and obtaining the allowable water consumption of the single-layer soil under the irrigation condition; generating root layer soil according to the maximum root system depth of the crops and calculating a depth value; calculating the depth value according to the allowable water consumption of the single-layer soil and the root layer soil under the irrigation condition to obtain the allowable water consumption of the soil under the irrigation condition; and if the allowed water consumption of the soil is the minimum value and the preset land occupation proportion value is not less than the minimum value of the preset land occupation proportion under the irrigation condition in the surface soil type partition, determining the least unfavorable point for irrigation. The technical problem that the determination of the most unfavorable point of irrigation is inaccurate is solved. The least beneficial point of irrigation of crops can be accurately determined through the application.

Description

Method and device for determining minimum irrigation points of crops and server
Technical Field
The application relates to the field of agricultural irrigation, in particular to a method and a device for determining the least beneficial point of irrigation of crops and a server.
Background
During a single rainfall event, the actual water holding capacity of the crop is generally reflected in the effective water holding capacity. Thereby better providing irrigation for the crops.
The inventor finds that at present, aiming at different crop varieties and different planting areas, the most unfavorable estimation and judgment of irrigation needs to be carried out manually, and the result is inaccurate, so that the irrigation is influenced. .
Aiming at the problem of inaccurate determination of the most unfavorable point of irrigation in the related art, no effective solution is provided at present.
Disclosure of Invention
The application mainly aims to provide a method, a device and a server for determining the most unfavorable point of irrigation, so as to solve the problem that the existing effective water-holding capacity calculation mode is poor in effect.
To achieve the above object, according to one aspect of the present application, there is provided a method for determining a worst point of irrigation for crops.
The irrigation least favorable point determination method according to the present application includes: acquiring the maximum root depth of the crops according to the crop variety numbers and the planting area numbers; determining a field sustaining correction coefficient under a preset irrigation condition, and obtaining the allowable water consumption of the single-layer soil under the irrigation condition; generating root layer soil according to the maximum root system depth of the crops and calculating a depth value; calculating the depth value according to the allowable water consumption of the single-layer soil and the root layer soil under the irrigation condition to obtain the allowable water consumption of the soil under the irrigation condition; and if the allowed water consumption of the soil is the minimum value and the preset land occupation proportion value is not less than the minimum value of the preset land occupation proportion under the irrigation condition in the surface soil type partition, determining the least unfavorable point for irrigation.
Further, calculating the depth value according to the allowable water consumption of the single-layer soil and the root-layer soil under the irrigation condition, and obtaining the allowable water consumption of the soil under the irrigation condition comprises the following steps: if the maximum root depth of the current crop is between the k-th layer and the k-1-th layer, the allowable water consumption of the soil under the irrigation condition is as follows: adding the water consumption of the first k-1 layer to the water consumption of the k-th layer, wherein the water consumption of the k-th layer is calculated in the following mode: and differentiating the integral water consumption of the kth layer into the proportion of each water consumption to the total water consumption, and multiplying the proportion by the depth of the root system.
Further, the allowable water consumption of the soil under the irrigation condition is that
Figure BDA0002023335100000021
Wherein, PSWIRR(i)，PSWIRR(K)For the permissible consumption of water by a single layer of soil under irrigation conditions, i denotes the range from 1 to k-1, zcrp,maxZs represents the soil depth array for the maximum root depth of the crop.
Further, determining the duration correction factor under the preset irrigation conditions comprises: when the type of the irrigation equipment is spray irrigation, acquiring a corresponding field support correction coefficient Q1 according to the spray irrigation condition; and when the irrigation equipment type is drip irrigation, acquiring a corresponding field maintenance correction factor Q2 under the drip irrigation condition according to the soil depth and the soil type code.
Further, the PSW for allowing water consumption of the single-layer soil under irrigation conditionsIRR＝PswQ, wherein Q represents the duration correction factor under the preset irrigation conditions, PswCrop consumable water parameter per monolayer soil thickness 10.
In order to achieve the above object, according to another aspect of the present application, there is provided a minimum disadvantage determination apparatus for irrigation of crops.
The irrigation least favorable point determining apparatus for crops according to the present application includes: the acquisition module is used for acquiring the maximum root depth of the crops according to the crop variety numbers and the planting area numbers; the determining module is used for determining the field-sustaining correction coefficient under the preset irrigation condition and obtaining the allowable water consumption of the single-layer soil under the irrigation condition; the depth value module is used for generating a root layer soil calculation depth value according to the maximum root system depth of the crops; the allowable water consumption module is used for calculating a depth value according to the allowable water consumption of the single-layer soil and the root layer soil under the irrigation condition to obtain the allowable water consumption of the soil under the irrigation condition; and the most unfavorable irrigation point module is used for determining the most unfavorable irrigation point when the allowed water consumption of the soil is the minimum value and the preset land occupation block proportion value is not less than the minimum value of the preset land occupation block proportion under the irrigation condition in the surface soil type partition.
Further, the allowable water consumption module includes: the first calculation unit is used for calculating the allowable water consumption of the soil under the irrigation condition when the maximum root system depth of the current crop is between the k-th layer and the k-1-th layer: and adding the water consumption of the first k-1 layer to the water consumption of the k-th layer, wherein the water consumption of the k-th layer is calculated by differentiating the integral water consumption of the k-th layer into the proportion of each part in the total water consumption and multiplying the proportion by the root depth.
Further, the allowable water consumption of the soil under the irrigation condition is that
Figure BDA0002023335100000031
Wherein, PSWIRR(i)，PSWIRR(K)For the permissible consumption of water by a single layer of soil under irrigation conditions, i denotes the range from 1 to k-1, zcrp,maxZs represents the soil depth array for the maximum root depth of the crop.
Further, the determining module includes: the sprinkling irrigation unit is used for acquiring a corresponding field maintenance correction coefficient Q1 according to sprinkling irrigation conditions when the type of the irrigation equipment is sprinkling irrigation; and the drip irrigation unit is used for acquiring a corresponding field maintenance correction factor Q2 under the drip irrigation condition according to the soil depth and the soil type code when the irrigation equipment is in the drip irrigation mode.
In order to achieve the above object, according to still another aspect of the present application, there is provided a server including the irrigation minimum point determination device.
In the embodiment of the application, the adoption is according to crop variety serial number and planting area serial number acquire the mode of the biggest root system degree of depth of crop, hold the correction coefficient through confirming the field under predetermineeing the irrigation condition to obtain under the irrigation condition single-deck soil and allow the water consumption and according to the biggest root system degree of depth of crop generates root layer soil and calculates the degree of depth, reached according to under the irrigation condition single-deck soil allow the water consumption with root layer soil calculates the degree of depth, obtains the purpose of soil allowed water consumption under the irrigation condition, thereby realized accurate, calculate the technological effect of the effective water capacity proportion of rainfall in real time, and then solved the not good technical problem of current effective water capacity calculation mode effect.
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The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic flow chart of a method for determining a minimum disadvantage of irrigation according to a first embodiment of the present application;
FIG. 2 is a schematic flow chart of a method for determining a minimum disadvantage of irrigation according to a second embodiment of the present application;
FIG. 3 is a schematic flow chart of a method for determining a minimum disadvantage of irrigation according to a third embodiment of the present application;
FIG. 4 is a structural intent of the irrigation most unfavorable point determination device according to the first embodiment of the present application;
FIG. 5 is a structural intent of a device for determining the most unfavorable point of irrigation according to a second embodiment of the present application;
FIG. 6 is a schematic view of a third embodiment of the present application showing a device for determining the minimum point of irrigation;
fig. 7 is a schematic diagram of a principle implementation of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, 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, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the method includes steps S102 to S108 as follows:
step S102, acquiring the maximum root depth of the crop according to the crop variety number and the planting area number;
and obtaining the maximum root number depth of the crops according to the determined crop variety number and the determined planting area number. Specifically, the crop variety number refers to a crop variety ID. The planting area number refers to a planting area ID. The crop variety ID and the planting area ID may be obtained from a preset parameter table, and a person skilled in the art may select the crop variety ID and the planting area ID according to different use scenarios.
Step S104, determining a field sustaining correction coefficient under a preset irrigation condition, and obtaining the allowable water consumption of the single-layer soil under the irrigation condition;
the soil type, field water capacity and crop water consumption parameters are different in a preset soil available water calculation parameter table. Meanwhile, the surface soil type, the soil depth, the soil type and the effective precipitation proportion are also different in a preset soil type table. It is possible to determine a sustainability correction factor under preset irrigation conditions for different said soil depths and said soil type codes.
Furthermore, the allowable water consumption of the single-layer soil under the irrigation condition can be obtained according to the field maintenance correction coefficient under the preset irrigation condition.
Step S106, generating a root layer soil calculation depth value according to the maximum root system depth of the crop;
and generating a root layer soil calculation depth value according to the maximum root system depth of the crops acquired in the previous step.
And S108, calculating the depth value according to the allowable water consumption of the single-layer soil and the root layer soil under the irrigation condition to obtain the allowable water consumption of the soil under the irrigation condition.
And performing correlation calculation according to the allowable water consumption of the single-layer soil under the irrigation condition and the calculated depth value of the root layer soil to obtain the allowable water consumption of the soil under the irrigation condition, and taking the allowable water consumption of the soil under the irrigation condition as an effective rainfall holding proportion for crops.
Step S110, if the allowed water consumption of the soil under the irrigation condition in the surface soil type partition is the minimum value and the preset land occupation block proportion value is not less than the minimum value of the preset land occupation block proportion, determining that the irrigation is the most unfavorable point.
Specifically, when the allowable water consumption amount of soil in the surface soil type partition is the minimum value and SLTP _ AREAP ≧ SLTP _ AREAP _ MIN, it can be confirmed whether the worst point SLWC _ MIN is 1.
It should be noted that the preset land occupation proportion value is determined by the pre-stored surface soil type partition number. Those skilled in the art can select or configure the device according to the actual usage scenario.
As can be seen from the above, in the above method, first, the allowable water consumption amount of each layer of soil is calculated based on the soil texture of each layer, the field water holding capacity of each layer of soil texture, and the consumable water parameter. And then correcting the allowable water consumption of the single-layer soil according to different irrigation mode correction coefficients, and finally accumulating according to the maximum root depth to obtain the allowable water consumption of the soil.
From the above description, it can be seen that the following technical effects are achieved by the present application:
in the embodiment of the application, the adoption is according to crop variety serial number and planting area serial number acquire the mode of the biggest root system degree of depth of crop, hold the correction coefficient through confirming the field under predetermineeing the irrigation condition to obtain under the irrigation condition single-deck soil and allow the water consumption and according to the biggest root system degree of depth of crop generates root layer soil and calculates the depth value, reached according to under the irrigation condition single-deck soil allow the water consumption with root layer soil calculates the depth value, thereby obtains under the irrigation condition soil and allow the water consumption and confirm the purpose that the most unfavorable point of irrigation confirms, thereby realized accurate, irrigate the technological effect that the most unfavorable point was confirmed in real time, and then solved current irrigation the technical problem that the most unfavorable point of effect is not good.
According to the embodiment of the present application, as shown in fig. 2, preferably, the calculating the depth value according to the allowable water consumption of the single-layer soil and the root-layer soil under the irrigation condition, and obtaining the allowable water consumption of the soil under the irrigation condition includes:
step S202, if the maximum root depth of the current crop is between the k-th layer and the k-1-th layer, the allowed water consumption of the soil under the irrigation condition is as follows: the water consumption of the first k-1 layer plus the water consumption of the k-th layer,
wherein the water consumption of the k layer is calculated in the following way: and differentiating the integral water consumption of the kth layer into the proportion of each water consumption to the total water consumption, and multiplying the proportion by the depth of the root system.
Specifically, the allowable water consumption of the soil under the irrigation condition is the water consumption of the first k-1 layer plus the water consumption SLTP _ IRR _ PSW (the water consumption of the k-th layer) SlwcIs composed of
Figure BDA0002023335100000071
Wherein, PSWIRR(i)，PSWIRR(K)For the permissible consumption of water by a single layer of soil under irrigation conditions, i denotes the range from 1 to k-1, zcrp,maxZs represents the soil depth array for the maximum root depth of the crop. Specifically, for each subarea, along the depth, the layers are summed, the position of the maximum depth, the soil depth array zs (j), and the allowable soil water consumption PSW of the corresponding single layer are judged from 0IRR(i)。
It should be noted that the above implementation conditions are: zs (k-1)<zcrp,max≤zs(k)。
According to the embodiment of the present application, as a preference in the embodiment, as shown in fig. 3, determining the duration correction factor under the preset irrigation condition includes:
step S302, when the type of the irrigation equipment is spray irrigation, acquiring a corresponding field maintenance correction coefficient Q1 according to the spray irrigation condition;
and S304, when the irrigation equipment is in a drip irrigation mode, acquiring a corresponding field maintenance correction coefficient Q2 under the drip irrigation condition according to the soil depth and the soil type code.
Specifically, the corresponding field sustaining correction coefficient Q1 under the sprinkling irrigation condition; and obtaining the corresponding field sustaining correction coefficient Q2 under the drip irrigation condition according to the corresponding field sustaining correction coefficient Q1 and the corresponding field sustaining correction coefficient Q2.
Preferably, the PSW for the allowable water consumption of the single-layer soil under the irrigation conditionIRR＝Psw*Q，
Wherein Q represents a field constant correction factor under preset irrigation conditions, PswCrop consumable water parameter per monolayer soil thickness 10.
PSW＝AWH×AD×AWX 10(cm is converted to mm),
a is describedWHSoil consumable Water parameter, said ADA crop consumable water parameter, said AVThe thickness of the single layer of soil is equal to the soil depth-the upper layer of soil depth.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
There is also provided, in accordance with an embodiment of the present application, apparatus for implementing the above-described irrigation worst point determining method, as shown in fig. 4, the apparatus including: the obtaining module 10 is used for obtaining the maximum root depth of the crops according to the crop variety numbers and the planting area numbers; the determining module 20 is configured to determine a field-sustaining correction coefficient under a preset irrigation condition, and obtain an allowable water consumption amount of single-layer soil under the irrigation condition; the depth value module 30 is used for generating a root layer soil calculation depth value according to the maximum root system depth of the crops; and the allowable water consumption module 40 is used for calculating the depth value according to the allowable water consumption of the single-layer soil under the irrigation condition and the root layer soil to obtain the allowable water consumption of the soil under the irrigation condition. An irrigation least favorable point module 50, configured to determine the irrigation least favorable point when the allowed water consumption of the soil under the irrigation condition in the surface soil type partition is the minimum value and the preset land occupation block proportion value is not less than the minimum value of the preset land occupation block proportion
According to the number of the crop variety and the number of the determined planting area, the depth of the maximum root number of the crop can be obtained in the obtaining module 10. Specifically, the crop variety number refers to a crop variety ID. The planting area number refers to a planting area ID. The crop variety ID and the planting area ID may be obtained from a preset parameter table, and a person skilled in the art may select the crop variety ID and the planting area ID according to different use scenarios.
The determination module 20 of the embodiment of the application is different in the calculation parameter table of the effective water in the preset soil due to the soil type, the field water capacity and the water consumption parameter of crops. Meanwhile, the surface soil type, the soil depth, the soil type and the effective precipitation proportion are also different in a preset soil type table. It is possible to determine a sustainability correction factor under preset irrigation conditions for different said soil depths and said soil type codes.
Furthermore, the allowable water consumption of the single-layer soil under the irrigation condition can be obtained according to the field maintenance correction coefficient under the preset irrigation condition.
In the depth value module 30 of the embodiment of the present application, the root layer soil calculated depth value may be generated according to the maximum root system depth of the crop obtained in the previous step.
According to the allowable water consumption of the single-layer soil under the irrigation condition and the calculated depth value of the root layer soil, the allowable water consumption of the soil under the irrigation condition is obtained through relevant calculation in the allowable water consumption module 40, and the allowable water consumption of the soil under the irrigation condition is used as the effective rainfall capacity proportion for crops.
In the irrigation worst point module 50 of the embodiment of the present application, specifically, when the allowable consumed water amount of soil in the surface soil type partition is the minimum value and SLTP _ AREAP ≧ SLTP _ AREAP _ MIN, it can be confirmed whether the worst point SLWC _ MIN is 1.
According to an embodiment of the present application, as a preference in the embodiment, as shown in fig. 5, the allowable water consumption module includes: the first calculating unit 401 is configured to, when the maximum root depth of the current crop is located between k and k-1 layers, allow the water consumption of the soil under the irrigation condition to be: and adding the water consumption of the first k-1 layer to the water consumption of the k-th layer, wherein the water consumption of the k-th layer is calculated by differentiating the integral water consumption of the k-th layer into the proportion of each part in the total water consumption and multiplying the proportion by the root depth.
The allowable water consumption of the soil under the irrigation condition is that
Figure BDA0002023335100000101
Wherein, PSWIRR(i)，PSWIRR(K)For the permissible consumption of water by a single layer of soil under irrigation conditions, i denotes the range from 1 to k-1, zcrp,maxZs represents the soil depth array for the maximum root depth of the crop.
Specifically, for each partition, along the depth, the layers sum, starting from 0 to determine the location of the maximum depth.
It should be noted that the above implementation conditions are: zs (k-1)<zcrp,max≤zs(k)。
According to the embodiment of the present application, as a preferred feature in the embodiment, as shown in fig. 6, the determining module includes: the sprinkling irrigation unit 201 is used for acquiring a corresponding field support correction coefficient Q1 according to sprinkling irrigation conditions when the type of the irrigation equipment is sprinkling irrigation; and the drip irrigation unit 202 is used for acquiring a corresponding field sustaining correction factor Q2 under the drip irrigation condition according to the soil depth and the soil type code when the irrigation equipment type is drip irrigation.
Specifically, the corresponding field sustaining correction coefficient Q1 under the sprinkling irrigation condition; and obtaining the corresponding field sustaining correction coefficient Q2 under the drip irrigation condition according to the corresponding field sustaining correction coefficient Q1 and the corresponding field sustaining correction coefficient Q2.
Preferably, the PSW for the allowable water consumption of the single-layer soil under the irrigation conditionIRR＝Psw*Q，
Wherein Q represents a field constant correction factor under preset irrigation conditions, PswCrop consumable water parameter per monolayer soil thickness 10.
PSW＝AWH×AD×AWX 10(cm is converted to mm),
a is describedWHSoil consumable Water parameter, said ADA crop consumable water parameter, said AVThe thickness of the single layer of soil is equal to the soil depth-the upper layer of soil depth.
Please refer to fig. 7, which is a schematic diagram of an implementation principle of the present application.
Firstly, acquiring the maximum root depth of the crops according to the serial numbers of the crop varieties and the serial numbers of the planting areas; then generating root layer soil according to the maximum root system depth of the crops and calculating a depth value;
specifically, calculating the depth value according to the allowable water consumption of the single-layer soil and the root-layer soil under the irrigation condition, and obtaining the allowable water consumption of the soil under the irrigation condition comprises the following steps:
if the maximum root depth of the current crop is between the k-th layer and the k-1-th layer, the allowable water consumption of the soil under the irrigation condition is as follows: the water consumption of the first k-1 layer plus the water consumption of the k-th layer,
wherein the water consumption of the k layer is calculated in the following way: and differentiating the integral water consumption of the kth layer into the proportion of each water consumption to the total water consumption, and multiplying the proportion by the depth of the root system.
The allowable water consumption of the soil under the irrigation condition is that
Figure BDA0002023335100000111
Wherein, PSWIRR(i)，PSWIRR(K)Allowable water consumption for single-layer soil under irrigation conditions, i tableDenotes the range from 1 to k-1, zcrp,maxZs represents the soil depth array for the maximum root depth of the crop.
Secondly, determining a field-sustaining correction coefficient under a preset irrigation condition, and obtaining the allowable water consumption of the single-layer soil under the irrigation condition;
determining the field sustaining correction factor under the preset irrigation conditions comprises:
when the type of the irrigation equipment is spray irrigation, acquiring a corresponding field support correction coefficient Q1 according to the spray irrigation condition;
and when the irrigation equipment type is drip irrigation, acquiring a corresponding field maintenance correction factor Q2 under the drip irrigation condition according to the soil depth and the soil type code.
The PSW for the allowable water consumption of the single-layer soil under the irrigation conditionIRR＝Psw*Q，
Wherein Q represents a field constant correction factor under preset irrigation conditions, PswCrop consumable water parameter per monolayer soil thickness 10.
And finally, calculating the depth value according to the allowable water consumption of the single-layer soil and the root layer soil under the irrigation condition to obtain the allowable water consumption of the soil under the irrigation condition. The least favorable points are determined: and if the allowed water consumption of the soil is the minimum value and the preset land occupation proportion value is not less than the minimum value of the preset land occupation proportion under the irrigation condition in the surface soil type partition, determining the least unfavorable point for irrigation.
That is, when the allowable water consumption amount of soil in the surface soil type partition is the minimum value and SLTP _ AREAP ≧ SLTP _ AREAP _ MIN, it can be confirmed whether the worst point SLWC _ MIN is 1.
In addition, in another embodiment of the present application, there is provided a server, including the irrigation minimum point determining device, where the implementation principle and the beneficial effects of the irrigation minimum point determining device are as described above and are not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present application described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and they may alternatively be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from multiple modules or steps. Thus, the present application is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (3)

1. A method for determining a worst point for irrigation of a crop, comprising:
acquiring the maximum root depth of the crops according to the serial numbers of the crop varieties and the serial numbers of the planting areas;
determining a field sustaining correction coefficient under a preset irrigation condition, and obtaining the allowable water consumption of the single-layer soil under the irrigation condition;
generating root layer soil according to the maximum root system depth of the crops and calculating a depth value;
calculating the depth value according to the allowable water consumption of the single-layer soil and the root layer soil under the irrigation condition to obtain the allowable water consumption of the soil under the irrigation condition;
determining the least unfavorable point of irrigation if the allowed water consumption of the soil is the minimum value and the preset land occupation block proportion value is not less than the minimum value of the preset land occupation block proportion under the irrigation condition in the surface soil type partition;
calculating the depth value according to the allowable water consumption of the single-layer soil and the root-layer soil under the irrigation condition, and obtaining the allowable water consumption of the soil under the irrigation condition comprises the following steps:
if the maximum root depth of the current crop is between the k-th layer and the k-1-th layer, the allowable water consumption of the soil under the irrigation condition is as follows: adding the water consumption of the first k-1 layer to the water consumption of the k-th layer, wherein the water consumption of the k-th layer is calculated in the following mode: differentiating the integral water consumption of the kth layer into the proportion of each water consumption to the total water consumption and multiplying the proportion by the depth of the root system,
the allowable water consumption of the soil under the irrigation condition is that
Figure FDA0002802004190000011
Wherein, PSWIRR(i)，PSWIRR(K)For the permissible consumption of water by a single layer of soil under irrigation conditions, i denotes the range from 1 to k-1, zcrp,maxZs represents a soil depth array for the maximum root depth of the crops,
determining the field sustaining correction factor under the preset irrigation conditions comprises:
when the type of the irrigation equipment is spray irrigation, acquiring a corresponding field support correction coefficient Q1 according to the spray irrigation condition; when the irrigation equipment type is drip irrigation, acquiring a corresponding field sustaining correction coefficient Q2 under the drip irrigation condition according to the soil depth and the soil type code;
the PSW for the allowable water consumption of the single-layer soil under the irrigation conditionIRR＝PswQ, wherein Q represents the duration correction factor under the preset irrigation conditions, PswCrop consumable water parameter per monolayer soil thickness 10.
2. A least favorable point determining apparatus for irrigation of a crop, comprising:
the acquisition module is used for acquiring the maximum root depth of the crops according to the crop variety numbers and the planting area numbers;
the determining module is used for determining the field-sustaining correction coefficient under the preset irrigation condition and obtaining the allowable water consumption of the single-layer soil under the irrigation condition;
the depth value module is used for generating a root layer soil calculation depth value according to the maximum root system depth of the crops;
the allowable water consumption module is used for calculating a depth value according to the allowable water consumption of the single-layer soil and the root layer soil under the irrigation condition to obtain the allowable water consumption of the soil under the irrigation condition;
the irrigation most unfavorable point module is used for determining the most unfavorable point for irrigation when the allowed water consumption of the soil is the minimum value and the preset land occupation proportion value is not less than the minimum value of the preset land occupation proportion under the irrigation condition in the surface soil type partition;
the allowable water consumption module includes:
the first calculation unit is used for calculating the allowable water consumption of the soil under the irrigation condition when the maximum root system depth of the current crop is between the k-th layer and the k-1-th layer: the water consumption of the first k-1 layer plus the water consumption of the k-th layer,
differentiating the integral water consumption of the kth layer into the proportion of each part in the total water consumption and multiplying the proportion by the depth of a root system;
the allowable water consumption of the soil under the irrigation condition is that
Figure FDA0002802004190000021
Wherein, PSWIRR(i)，PSWIRR(K)For the permissible consumption of water by a single layer of soil under irrigation conditions, i denotes the range from 1 to k-1, zcrp,maxZs represents a soil depth array for the maximum root depth of the crop;
the determining module comprises:
the sprinkling irrigation unit is used for acquiring a corresponding field maintenance correction coefficient Q1 according to sprinkling irrigation conditions when the type of the irrigation equipment is sprinkling irrigation;
and the drip irrigation unit is used for acquiring a corresponding field maintenance correction factor Q2 under the drip irrigation condition according to the soil depth and the soil type code when the irrigation equipment is in the drip irrigation mode.
3. A server, characterized by comprising an irrigation minimum point determination device according to claim 2.
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