CN105210801A - Irrigation opportunity and irrigate method for determination of amount and device - Google Patents
Irrigation opportunity and irrigate method for determination of amount and device Download PDFInfo
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Abstract
Embodiments provide a kind of irrigation opportunity and irrigate method for determination of amount and device, wherein, the method comprises: according to the meteorological data in the meteorological data treated in the past preset time period of irrigated area and following preset time period, treat the Crop Evapotranspiration of irrigated area described in calculating; Treat the actual water content of the soil of irrigated area described in continuous measurement, described in calculating according to the variable quantity of the actual water content of described soil, treat the water content consumption of irrigated area; In conjunction with described in treat the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area, treat opportunity of pouring water and the irrigation quantity of irrigated area described in determining.The evapotranspiration method being used for decision-making on a large scale effectively combines with the soil water point-score being used for decision-making among a small circle and may be used for carrying out irrigation decision to large-scale open type farmland, meadow and forest by the method, and can improve the accuracy of irrigation decision.
Description
Technical field
The present invention relates to irrigation technique field, particularly one is irrigated opportunity and is irrigated method for determination of amount and device.
Background technology
In prior art, two kinds of decision theory systems are mainly contained for irrigation: the first is the moisture loss method based on water balance equation and evapotranspiration, the essence of the method carrys out computing Crop Evapotranspiration (or being called evapotranspiration rate) based on the history meteorological data in plant growth district a period of time, according to this Crop Evapotranspiration determination irrigation scheme, but, this Crop Evapotranspiration obtains based on meteorological data computing, because meteorological data itself exists uncertain, and verification method is not had for the Crop Evapotranspiration obtained, make the uncertainty of Crop Evapotranspiration can affect the accuracy of irrigation scheme, the second is the soil moisture content method based on actual measurement soil moisture, the essence of the method adopts the mode of experiment or apparatus measures to record actual water content in soil, according to plant growth law of needing the water and the actual water content of soil recorded, calculate the water yield that this stage needs irrigation, but, owing to being the actual water content obtaining soil based on experiment or apparatus measures mode, experiment or apparatus measures are not suitable for multiple spot and carry out, the actual water content of the soil recorded only can represent local soil, the actual water content of soil on a large scale can not be represented, therefore, if determine that the irrigation scheme in land for growing field crops can exist accuracy problems by the method.
Summary of the invention
Embodiments provide a kind of irrigation opportunity and irrigate method for determination of amount, to improve the accuracy of the irrigation scheme in farmland on a large scale.The method comprises: according to the meteorological data in the meteorological data treated in the past preset time period of irrigated area and following preset time period, treat the Crop Evapotranspiration of irrigated area described in calculating; Treat the actual water content of the soil of irrigated area described in continuous measurement, described in calculating according to the variable quantity of the actual water content of described soil, treat the water content consumption of irrigated area; In conjunction with described in treat the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area, treat opportunity of pouring water and the irrigation quantity of irrigated area described in determining.
In one embodiment, in conjunction with described in treat the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area, opportunity of pouring water and the irrigation quantity of irrigated area is treated described in determining, comprise: treat that the Crop Evapotranspiration of irrigated area treats the first relative water content curve of irrigated area soil described in obtaining according to described, the abscissa of described first relative water content curve is the time, and ordinate is the soil relative water content be converted to by Crop Evapotranspiration; Treat that the water content consumption of irrigated area treats the second relative water content curve of irrigated area soil described in obtaining according to described, the abscissa of described second relative water content curve is the time, and ordinate is the soil relative water content be converted to by water content consumption; According to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, described in determining, treat opportunity of pouring water and the irrigation quantity of irrigated area.
In one embodiment, according to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, opportunity of pouring water and the irrigation quantity of irrigated area is treated described in determining, comprise: according to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, the new relative water content curve of irrigated area is treated described in acquisition, wherein, described new relative water content curve and described first relative water content curve and described second relative water content curve meet following relational expression: Z
q=K+aX
m+ bY
nwherein, Z is described new relative water content curve, and X is described first relative water content curve, Y is described second relative water content curve, a, b, m, n, q and k be all according to X and Y between the numerical value determined of the rate of change of departure, numerical value on X and Y curve and X and Y curve; According to the described new relative water content curve treating irrigated area, described in determining, treat opportunity of pouring water and the irrigation quantity of irrigated area.
In one embodiment, according to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, treat the new relative water content curve of irrigated area described in acquisition, comprising: the relative water content numerical value deducting corresponding time point on the second relative water content curve with the relative water content numerical value of each time point on the first relative water content curve obtains difference; For each time point, when the absolute value obtaining difference is greater than preset value, the relative water content numerical value of corresponding time point on first relative water content curve is defined as the relative water content numerical value of this time point, when the absolute value obtaining difference is less than or equal to preset value, the relative water content numerical value of corresponding time point on the first relative water content curve and the mean value of the relative water content numerical value of corresponding time point on the second relative water content curve are defined as the relative water content numerical value of this time point, described in obtaining, treat the new relative water content curve of irrigated area.
In one embodiment, the actual water content of the soil of irrigated area is treated described in continuous measurement, the water content consumption of irrigated area is treated described in calculating according to the variable quantity of the actual water content of described soil, comprise: treat that one piece of growth of irrigated area has the soil body of crop to take multiple measurements to described, record the actual water content of soil of the described soil body; According to the variable quantity of the actual water content of the soil repeatedly recording the described soil body, described in determining, treat the water content consumption of irrigated area.
The embodiment of the present invention additionally provides a kind of determining device of irrigating opportunity and irrigation volume, to improve the accuracy of the irrigation scheme in farmland on a large scale.This device comprises: the first computing module, for according to treating the meteorological data in the past preset time period of irrigated area and the meteorological data in following preset time period, treats the Crop Evapotranspiration of irrigated area described in calculating; Second computing module, for treating the actual water content of the soil of irrigated area described in continuous measurement, treats the water content consumption of irrigated area according to the variable quantity of the actual water content of described soil described in calculating; Determination module, treats the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area, treats opportunity of pouring water and the irrigation quantity of irrigated area described in determining described in combining.
In one embodiment, described determination module, comprise: the first curve determining unit, for treating described in basis that the Crop Evapotranspiration of irrigated area treats the first relative water content curve of irrigated area soil described in obtaining, the abscissa of described first relative water content curve is the time, and ordinate is the soil relative water content be converted to by Crop Evapotranspiration; Second curve determining unit, for treating described in basis that the water content consumption of irrigated area treats the second relative water content curve of irrigated area soil described in obtaining, the abscissa of described second relative water content curve is the time, and ordinate is the soil relative water content be converted to by water content consumption; Irrigation scheme determining unit, for treating the first relative water content curve and the second relative water content curve of irrigated area soil described in basis, treats opportunity of pouring water and the irrigation quantity of irrigated area described in determining.
In one embodiment, described irrigation scheme determining unit, comprise: curve determination subelement, for treating the first relative water content curve and the second relative water content curve of irrigated area soil described in basis, the new relative water content curve of irrigated area is treated described in acquisition, wherein, described new relative water content curve and described first relative water content curve and described second relative water content curve meet following relational expression: Z
q=K+aX
m+ bY
nwherein, Z is described new relative water content curve, and X is described first relative water content curve, Y is described second relative water content curve, a, b, m, n, q and k be all according to X and Y between the numerical value determined of the rate of change of departure, numerical value on X and Y curve and X and Y curve; Irrigation scheme determination subelement, for treating the new relative water content curve of irrigated area described in basis, treats opportunity of pouring water and the irrigation quantity of irrigated area described in determining.
In one embodiment, described irrigation scheme determining unit, also comprise: compare subelement, obtain difference for the relative water content numerical value deducting corresponding time point on the second relative water content curve with the relative water content numerical value of each time point on the first relative water content curve, described curve determination subelement, also for for each time point, when the absolute value obtaining difference is greater than preset value, the relative water content numerical value of corresponding time point on first relative water content curve is defined as the relative water content numerical value of this time point, when the absolute value obtaining difference is less than or equal to preset value, the relative water content numerical value of corresponding time point on the first relative water content curve and the mean value of the relative water content numerical value of corresponding time point on the second relative water content curve are defined as the relative water content numerical value of this time point, the new relative water content curve of irrigated area is treated described in obtaining.
In one embodiment, described second computing module, comprising: measurement device, for treating that one piece of growth of irrigated area has the soil body of crop to take multiple measurements to described, records the actual water content of soil of the described soil body; Computing equipment, repeatedly records the variable quantity of the actual water content of soil of the described soil body, treats the water content consumption of irrigated area described in determining for basis.
In embodiments of the present invention, by combining the water content consumption treating irrigated area obtained according to the Crop Evapotranspiration treating irrigated area and the measurement of meteorological data calculating, determine opportunity of pouring water and the irrigation quantity for the treatment of irrigated area, the scope be suitable for due to the Crop Evapotranspiration calculated according to meteorological data is large, although it is little to measure the water content consumption scope of application obtained, but data are accurate, therefore, by in conjunction with Crop Evapotranspiration and water content consumption, the method may be used for determining farmland on a large scale, the irrigation scheme of meadow and forest etc. (such as, irrigation opportunity and irrigation volume etc.), and the accuracy of irrigation scheme can be improved.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms a application's part, does not form limitation of the invention.In the accompanying drawings:
Fig. 1 is a kind of flow chart of irrigating opportunity and irrigating method for determination of amount that the embodiment of the present invention provides;
Fig. 2 is a kind of structured flowchart of irrigating the determining device of opportunity and irrigation volume that the embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with embodiment and accompanying drawing, the present invention is described in further details.At this, exemplary embodiment of the present invention and illustrating for explaining the present invention, but not as a limitation of the invention.
In embodiments of the present invention, provide a kind of defining method of irrigation scheme, as shown in Figure 1, the method comprises:
Step 101: according to the meteorological data (the forecast meteorological data namely in following a period of time) in the meteorological data treated in the past preset time period of irrigated area (the history meteorological data namely in the past period) and following preset time period, treat described in calculating irrigated area Crop Evapotranspiration (such as, this Crop Evapotranspiration can be Crop Evapotranspiration per hour, every day Crop Evapotranspiration or monthly Crop Evapotranspiration);
Step 102: treat the actual water content of the soil of irrigated area described in continuous measurement, treat described in calculating according to the variable quantity of the actual water content of described soil irrigated area water content consumption (such as, this water content consumption can be water content consumption per hour, every day water content consumption or monthly water content consumption);
Step 103: treat the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area described in combination, treats opportunity of pouring water and the irrigation quantity of irrigated area described in determining.
Flow process is as shown in Figure 1 known, in embodiments of the present invention, by combining the water content consumption treating irrigated area obtained according to the Crop Evapotranspiration treating irrigated area and the measurement of meteorological data calculating, determine opportunity of pouring water and the irrigation quantity for the treatment of irrigated area, the scope be suitable for due to the Crop Evapotranspiration calculated according to meteorological data is large, although it is little to measure the water content consumption scope of application obtained, but data are accurate, therefore, by in conjunction with Crop Evapotranspiration and water content consumption, the method may be used for determining farmland on a large scale, the irrigation scheme of meadow and forest (such as, irrigation opportunity and irrigation volume etc.), and the accuracy of irrigation scheme can be improved.
During concrete enforcement, above-mentionedly treat that irrigated area can be large-scale farmland, meadow and forest etc., the Aridity index that international food and agricultural organization can be adopted to issue calculates the Crop Evapotranspiration treating irrigated area according to meteorological data, concrete, meteorological data can be the data such as maximum temperature, minimum temperature, relative moisture, intensity of sunshine, wind speed, wind direction, geographical position, height above sea level, above-mentionedly treat that the calculating of the Crop Evapotranspiration of irrigated area can adopt cloud service to calculate, to improve computational efficiency.
During concrete enforcement, the water content consumption treating irrigated area can be obtained by the following method, such as, the actual water content of the soil of irrigated area is treated described in continuous measurement, the water content consumption of irrigated area is treated described in calculating according to the variable quantity of the actual water content of described soil, comprise: treat that one piece of growth of irrigated area has the soil body of crop to take multiple measurements to described, record the actual water content of soil of the described soil body; According to the variable quantity of the actual water content of the soil repeatedly recording the described soil body, described in determining, treat the water content consumption of irrigated area.Concrete, can interval preset duration within a certain period of time, lysimeter or soil moisture sensor etc. is adopted to take multiple measurements one of normal growth crop piece of soil body, to obtain in certain hour the not actual water content of the soil of the soil body in the same time, so can by certain hour not in the same time the variable quantity of the actual water content of the soil of the soil body calculate the water content consumption treating irrigated area.Such as, can be measured the soil body continuously by on-line monitoring instrument, and the data recorded are transmitted by wireless communication mode, the mode of cloud service can be adopted to treat the water content consumption of irrigated area according to the change calculations of the actual water content of soil in the soil body simultaneously.
Obtain until the Crop Evapotranspiration of irrigated area with after the water content consumption of irrigated area, in the present embodiment, determine opportunity of pouring water and the irrigation quantity for the treatment of irrigated area by the following method, such as, in conjunction with described in treat the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area, opportunity of pouring water and the irrigation quantity of irrigated area is treated described in determining, comprise: treat that the Crop Evapotranspiration of irrigated area treats the first relative water content curve of irrigated area soil described in obtaining according to described, the abscissa of described first relative water content curve is the time, ordinate is the soil relative water content be converted to by Crop Evapotranspiration, treat that the water content consumption of irrigated area treats the second relative water content curve of irrigated area soil described in obtaining according to described, the abscissa of described second relative water content curve is the time, and ordinate is the soil relative water content be converted to by water content consumption, according to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, described in determining, treat opportunity of pouring water and the irrigation quantity of irrigated area.Concrete, by the mode of saturated soil water content (field capacity) J evapotranspiration/field capacity of actual measurement, Crop Evapotranspiration can be converted to soil relative water content, to obtain above-mentioned the first relative water content curve treating irrigated area soil, water content consumption can be converted to soil relative water content, to obtain above-mentioned the second relative water content curve treating irrigated area soil by the mode of saturated soil water content (field capacity) J daily consumption of water/field capacity of actual measurement.
During concrete enforcement, according to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, opportunity of pouring water and the irrigation quantity of irrigated area is treated described in determining, comprise: according to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, the new relative water content curve of irrigated area is treated described in acquisition, wherein, described new relative water content curve and described first relative water content curve and described second relative water content curve meet following relational expression: Z
q=K+aX
m+ bY
nwherein, Z is described new relative water content curve, X is described first relative water content curve, Y is described second relative water content curve, a, b, m, n, q and k be all according to X and Y between the numerical value determined of the rate of change of departure, numerical value on X and Y curve and X and Y curve, such as, departure between X and Y is larger, should growth trend be there is in X to the impact of Z, namely the numerical value of a is comparatively large, concrete, and a, b, m, n, q and k constantly can revise according to the data of multi collect thus the value of approaching to reality gradually; According to the described new relative water content curve treating irrigated area, described in determining, treat opportunity of pouring water and the irrigation quantity of irrigated area.
During concrete enforcement, according to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, treat the new relative water content curve of irrigated area described in acquisition, comprising: the relative water content numerical value deducting corresponding time point on the second relative water content curve with the relative water content numerical value of each time point on the first relative water content curve obtains difference; For each time point, when the absolute value obtaining difference is greater than preset value, the relative water content numerical value of corresponding time point on first relative water content curve is defined as the relative water content numerical value of this time point, when the absolute value obtaining difference is less than or equal to preset value, the relative water content numerical value of corresponding time point on the first relative water content curve and the mean value of the relative water content numerical value of corresponding time point on the second relative water content curve are defined as the relative water content numerical value of this time point, described in obtaining, treat the new relative water content curve of irrigated area; And then described in can determining according to described new relative water content curve, treat opportunity of pouring water and the irrigation quantity of irrigated area.Such as, A is put sometime on relative water content curve, the relative water content numerical value of corresponding time point A on the second relative water content curve is deducted with the relative water content numerical value of corresponding points A on the first relative water content curve, if the absolute value of difference is less than preset value, then the relative water content numerical value of time point A corresponding on the first relative water content curve is defined as the relative water content numerical value of this time point, or when the absolute value of difference is more than or equal to preset value, the relative water content numerical value of time point A corresponding on the first relative water content curve and the mean value of the relative water content numerical value of corresponding time point A on the second relative water content curve are defined as the relative water content numerical value of this time point, therefore the above-mentioned revised new relative water content curve treating irrigated area is obtained, opportunity of pouring water and the irrigation quantity for the treatment of irrigated area is determined based on this new relative water content curve, the accuracy of irrigation scheme can be improved.
Based on same inventive concept, additionally provide a kind of determining device of irrigating opportunity and irrigation volume in the embodiment of the present invention, as described in the following examples.Because irrigation is similar with irrigating method for determination of amount for opportunity to irrigation with the principle that the determining device of irrigation volume is dealt with problems for opportunity, the enforcement of therefore irrigating the determining device of opportunity and irrigation volume see the opportunity of irrigation and the enforcement of irrigating method for determination of amount, can repeat part and repeats no more.Following used, term " unit " or " module " can realize the software of predetermined function and/or the combination of hardware.Although the device described by following examples preferably realizes with software, hardware, or the realization of the combination of software and hardware also may and conceived.
Fig. 2 is a kind of structured flowchart of the irrigation opportunity of the embodiment of the present invention and the determining device of irrigation volume, as shown in Figure 2, comprising: the first computing module 201, second computing module 202 and determination module 203, is described this structure below.
First computing module 201, for according to treating the meteorological data in the past preset time period of irrigated area and the meteorological data in following preset time period, treats the Crop Evapotranspiration of irrigated area described in calculating;
Second computing module 202, is connected with the first computing module 201, for treating the actual water content of the soil of irrigated area described in continuous measurement, treats the water content consumption of irrigated area according to the variable quantity of the actual water content of described soil described in calculating;
Determination module 203, is connected with the second computing module 202, treats the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area, treat opportunity of pouring water and the irrigation quantity of irrigated area described in determining described in combining.
In one embodiment, described determination module 203, comprise: the first curve determining unit, for treating described in basis that the Crop Evapotranspiration of irrigated area treats the first relative water content curve of irrigated area soil described in obtaining, the abscissa of described first relative water content curve is the time, and ordinate is the soil relative water content be converted to by Crop Evapotranspiration; Second curve determining unit, for treating described in basis that the water content consumption of irrigated area treats the second relative water content curve of irrigated area soil described in obtaining, the abscissa of described second relative water content curve is the time, and ordinate is the soil relative water content be converted to by water content consumption; Irrigation scheme determining unit, be connected with the first curve determining unit and the second curve determining unit, for treating the first relative water content curve and the second relative water content curve of irrigated area soil described in basis, described in determining, treat opportunity of pouring water and the irrigation quantity of irrigated area.
In one embodiment, described irrigation scheme determining unit, comprise: curve determination subelement, for treating the first relative water content curve and the second relative water content curve of irrigated area soil described in basis, the new relative water content curve of irrigated area is treated described in acquisition, wherein, described new relative water content curve and described first relative water content curve and described second relative water content curve meet following relational expression: Z
q=K+aX
m+ bY
nwherein, Z is described new relative water content curve, and X is described first relative water content curve, Y is described second relative water content curve, a, b, m, n, q and k be all according to X and Y between the numerical value determined of the rate of change of departure, numerical value on X and Y curve and X and Y curve; Irrigation scheme determination subelement, is connected with curve determination subelement, for treating the new relative water content curve of irrigated area described in basis, treats opportunity of pouring water and the irrigation quantity of irrigated area described in determining.
In one embodiment, described irrigation scheme determining unit, also comprise: compare subelement, obtain difference for the relative water content numerical value deducting corresponding time point on the second relative water content curve with the relative water content numerical value of each time point on the first relative water content curve, irrigation scheme determination subelement, also for for each time point, when the absolute value obtaining difference is greater than preset value, the relative water content numerical value of corresponding time point on first relative water content curve is defined as the relative water content numerical value of this time point, when the absolute value obtaining difference is less than or equal to preset value, the relative water content numerical value of corresponding time point on the first relative water content curve and the mean value of the relative water content numerical value of corresponding time point on the second relative water content curve are defined as the relative water content numerical value of this time point, the new relative water content curve of irrigated area is treated described in obtaining.
In one embodiment, described second computing module 202, comprising: measurement device, for treating that one piece of growth of irrigated area has the soil body of crop to take multiple measurements to described, records the actual water content of soil of the described soil body; Computing equipment, repeatedly records the variable quantity of the actual water content of soil of the described soil body, treats the water content consumption of irrigated area described in determining for basis.
In one embodiment, described measurement device can be lysimeter, soil moisture sensor or evaporating dish etc.
In embodiments of the present invention, by combining the water content consumption treating irrigated area obtained according to the Crop Evapotranspiration treating irrigated area and the measurement of meteorological data calculating, determine opportunity of pouring water and the irrigation quantity for the treatment of irrigated area, the scope be suitable for due to the Crop Evapotranspiration calculated according to meteorological data is large, although it is little to measure the water content consumption scope of application obtained, but data are accurate, therefore, by in conjunction with Crop Evapotranspiration and water content consumption, the method may be used for determining on a large scale, the irrigation scheme of meadow and forest etc. (such as, irrigation opportunity and irrigation volume etc.), and the accuracy of irrigation scheme can be improved.
Obviously, those skilled in the art should be understood that, each module of the above-mentioned embodiment of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the embodiment of the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. irrigate opportunity and irrigate a method for determination of amount, it is characterized in that, comprising:
According to the meteorological data in the meteorological data treated in the past preset time period of irrigated area and following preset time period, described in calculating, treat the Crop Evapotranspiration of irrigated area;
Treat the actual water content of the soil of irrigated area described in continuous measurement, described in calculating according to the variable quantity of the actual water content of described soil, treat the water content consumption of irrigated area;
In conjunction with described in treat the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area, treat opportunity of pouring water and the irrigation quantity of irrigated area described in determining.
2. the method for claim 1, is characterized in that, in conjunction with described in treat the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area, treat opportunity of pouring water and the irrigation quantity of irrigated area described in determining, comprising:
Treat that the Crop Evapotranspiration of irrigated area treats the first relative water content curve of irrigated area soil described in obtaining according to described, the abscissa of described first relative water content curve is the time, and ordinate is the soil relative water content be converted to by Crop Evapotranspiration;
Treat that the water content consumption of irrigated area treats the second relative water content curve of irrigated area soil described in obtaining according to described, the abscissa of described second relative water content curve is the time, and ordinate is the soil relative water content be converted to by water content consumption;
According to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, described in determining, treat opportunity of pouring water and the irrigation quantity of irrigated area.
3. method as claimed in claim 2, is characterized in that, according to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, treat opportunity of pouring water and the irrigation quantity of irrigated area, comprising described in determining:
According to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, the new relative water content curve of irrigated area is treated described in acquisition, wherein, described new relative water content curve and described first relative water content curve and described second relative water content curve meet following relational expression:
Z
q＝K+aX
m+bY
n，
Wherein, Z is described new relative water content curve, X is described first relative water content curve, and Y is described second relative water content curve, a, b, m, n, q and k be all according to X and Y between the numerical value determined of the rate of change of departure, numerical value on X and Y curve and X and Y curve;
According to the described new relative water content curve treating irrigated area, described in determining, treat opportunity of pouring water and the irrigation quantity of irrigated area.
4. method as claimed in claim 3, is characterized in that, according to described the first relative water content curve and the second relative water content curve for the treatment of irrigated area soil, treat the new relative water content curve of irrigated area, comprising described in acquisition:
The relative water content numerical value deducting corresponding time point on the second relative water content curve with the relative water content numerical value of each time point on the first relative water content curve obtains difference;
For each time point, when the absolute value obtaining difference is greater than preset value, the relative water content numerical value of corresponding time point on first relative water content curve is defined as the relative water content numerical value of this time point, when the absolute value obtaining difference is less than or equal to preset value, the relative water content numerical value of corresponding time point on the first relative water content curve and the mean value of the relative water content numerical value of corresponding time point on the second relative water content curve are defined as the relative water content numerical value of this time point, described in obtaining, treat the new relative water content curve of irrigated area.
5. the method according to any one of Claims 1-4, is characterized in that, treats the actual water content of the soil of irrigated area described in continuous measurement, treats the water content consumption of irrigated area, comprising according to the variable quantity of the actual water content of described soil described in calculating:
Treat that one piece of growth of irrigated area has the soil body of crop to take multiple measurements to described, record the actual water content of soil of the described soil body;
According to the variable quantity of the actual water content of the soil repeatedly recording the described soil body, described in determining, treat the water content consumption of irrigated area.
6. irrigate a determining device for opportunity and irrigation volume, it is characterized in that, comprising:
First computing module, for according to treating the meteorological data in the past preset time period of irrigated area and the meteorological data in following preset time period, treats the Crop Evapotranspiration of irrigated area described in calculating;
Second computing module, for treating the actual water content of the soil of irrigated area described in continuous measurement, treats the water content consumption of irrigated area according to the variable quantity of the actual water content of described soil described in calculating;
Determination module, treats the Crop Evapotranspiration of irrigated area and the described water content consumption treating irrigated area, treats opportunity of pouring water and the irrigation quantity of irrigated area described in determining described in combining.
7. device as claimed in claim 6, it is characterized in that, described determination module, comprising:
First curve determining unit, for treating described in basis that the Crop Evapotranspiration of irrigated area treats the first relative water content curve of irrigated area soil described in obtaining, the abscissa of described first relative water content curve is the time, and ordinate is the soil relative water content be converted to by Crop Evapotranspiration;
Second curve determining unit, for treating described in basis that the water content consumption of irrigated area treats the second relative water content curve of irrigated area soil described in obtaining, the abscissa of described second relative water content curve is the time, and ordinate is the soil relative water content be converted to by water content consumption;
Irrigation scheme determining unit, for treating the first relative water content curve and the second relative water content curve of irrigated area soil described in basis, treats opportunity of pouring water and the irrigation quantity of irrigated area described in determining.
8. device as claimed in claim 7, it is characterized in that, described irrigation scheme determining unit, comprising:
Curve determination subelement, for treating the first relative water content curve and the second relative water content curve of irrigated area soil described in basis, the new relative water content curve of irrigated area is treated described in acquisition, wherein, described new relative water content curve and described first relative water content curve and described second relative water content curve meet following relational expression:
Z
q＝K+aX
m+bY
n，
Wherein, Z is described new relative water content curve, X is described first relative water content curve, and Y is described second relative water content curve, a, b, m, n, q and K be all according to X and Y between the numerical value determined of the rate of change of departure, numerical value on X and Y curve and X and Y curve;
Irrigation scheme determination subelement, for treating the new relative water content curve of irrigated area described in basis, treats opportunity of pouring water and the irrigation quantity of irrigated area described in determining.
9. device as claimed in claim 8, it is characterized in that, described irrigation scheme determining unit, also comprises:
Relatively subelement, obtains difference for the relative water content numerical value deducting corresponding time point on the second relative water content curve with the relative water content numerical value of each time point on the first relative water content curve;
Curve determination subelement, also for for each time point, when the absolute value obtaining difference is greater than preset value, the relative water content numerical value of corresponding time point on first relative water content curve is defined as the relative water content numerical value of this time point, when the absolute value obtaining difference is less than or equal to preset value, the relative water content numerical value of corresponding time point on the first relative water content curve and the mean value of the relative water content numerical value of corresponding time point on the second relative water content curve are defined as the relative water content numerical value of this time point, the new relative water content curve of irrigated area is treated described in obtaining.
10. the device according to any one of claim 6 to 9, is characterized in that, described second computing module, comprising:
Measurement device, for treating that one piece of growth of irrigated area has the soil body of crop to take multiple measurements to described, records the actual water content of soil of the described soil body;
Computing equipment, repeatedly records the variable quantity of the actual water content of soil of the described soil body, treats the water content consumption of irrigated area described in determining for basis.
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