CN108280773A - A method of differentiating that interzone staple food crop fits water plantation - Google Patents
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Abstract
The present invention relates to a kind of methods that differentiation interzone staple food crop fits water plantation, including:Divide region;Crop divides;Cereal crops water requirement is calculated by ten days;Effective precipitation in cereal crops growth period is calculated by ten days;Irrigation requirement calculates;Production estimation element characteristic vector analysis;Normalization;Suitable water plantation is judged.The present invention is theoretical based on Virtual water, water footprints, the discrimination formula that staple food crop fits water plantation is established with Hierarchy Analysis Method, and the method for differentiating that interzone staple food crop fits water plantation is proposed using the formula, objective, comprehensive reflection grain-production and water resource use, that is effective rainfall and duty, space characteristics are that the rationalization utilization of agricultural water resources and staple food crop fit water planting structure distribution and provide scientific basis.
Description
Technical field
The present invention relates to a kind of methods that differentiation interzone staple food crop fits water plantation, are a kind of cereal crops production
The method of water resources rational use is a kind of method rationally to control and configuring area cereal crops irrigation water uses.
Background technology
As population increases the continuous promotion with living standards of the people, grain demand amount will be further increased, agricultural development
It is faced with the challenge that more grains are produced with limited water resources.It is planted by suitable water, reduction cereal crops production needs water consumption, spy
It is not blue water demand, the grain production capacity for improving folk prescription water is the root for alleviating regional water resources pressure and Ensuring Food Safety
This measure.
In recent years, the utilization of the water resources such as Virtual water, water footprints and management theory method, provide for agricultural water resources management
New thinking.A kind of measuring method of grain production water footprint of region(Wu Pute, 2013)Calculate the indigo plant in grain-production
Water footprints and clear water footprint, a method of calculating interzone fictitious flow momentum(Ma Jing, 2014)Analyze Agricultural Water money
The transregional flow in source.Still lack grain-production to clear water, Lan Shui, Productive statistics and output spatial framework relative quantification at present
Method of discrimination lacks and agricultural production, water resources management and policymaker is allowed intuitively to differentiate cereal crops space planting structure distribution and optimization
Quick method.
Invention content
In order to overcome problem of the prior art, the present invention to propose a kind of suitable water plantation of differentiation interzone staple food crop
Method.Ratio, production cost, cost of land, the per unit area yield synthesis that the method accounts for water requirement using water requirement, irrigation volume are sentenced
The space characteristics and its adaptability of disconnected plant of grain crops for optimization cereal crops space layout, control and reduce grain-production
Irrigation water capacity provides help.
The object of the present invention is achieved like this:A method of differentiating that interzone staple food crop fits water plantation, institute
The step of stating method is as follows:
The step of dividing region:Extensive area classification is divided into according to the characteristics of landform, weather, socio-economic development situation
Several survey regions;It collects each survey region staple food crop breeding time, provided with breeding time relevant meteorological data, rainfall
Material;
The step of crop divides:Cereal crops are divided into i class cereal crops, and i is natural number, represents rice, wheat, corn, height
One kind in fine strain of millet, sweet potato, sweet potato, purple sweet potato;
The step of cereal crops water requirement being calculated by ten days:
I class cereal crops evapotranspiration of the survey region by ten days is calculated by formulaET 0:
Wherein:Δ is saturation vapour pressure-temperature curve slope;R n To input the net radiation of crop canopies;GIt is consumed for gain of heat soil
Energy;γFor hygrometer constant;TFor temperature on average;U 2For 2m high wind speeds;e a For saturation vapour pressure;e d For actual observation steam
Pressure;
Group cereal crops water requirement of the survey region by ten days is calculated by formulaET i :
ET i = ET 0×Kc i
Wherein:Kc i For i kind cereal crops coefficients;
The step of effective precipitation in cereal crops growth period being calculated by ten days:Using in region each meteorological site ten days precipitation as base
Plinth calculates areal rainfall, in conjunction with the water demand of crop in ten days, in zoning difference cereal crops breeding time with Thiessen polygon method
Effectiv precipitation:
PE i = f(P)= min(P,PE i )
In formula,PIt is survey region by ten days precipitation magnitude;PE i For the effectiv precipitation of each subregion i kind cereal crops;
The step of irrigation requirement calculates:Effective rainfall in growth period is drawn in cereal crops growth first, insufficient section again by
Duty supplements:
In formula,IR i For the irrigation requirement of i-th kind of cereal crops of each subregion;
The step of irrigation water accounting calculates:Irrigation water proportion in water requirementCalculating:
;
The step of production estimation element characteristic vector analysis:, input small, output greatly criterion few with water consumption, utilizes level
Analytic approach carries out comprehensive diagnos to the complicated cereal crops production system of multiple target, multiple criteria, amorphousness, according to cereal crops
Classification between each production factors and level are carried out organic assembling and distinguishing hierarchy, establish progressive hierarchical structure, referred to using two-stage
Mark judgment matrix group acquires integration objective maximum, step analysis matrix:
The first order:Including production water requirement, Productive statistics, production output three classes index, increased using water resource, volume increase for saving
For receipts, on the one hand it is expected that production water requirement is small, output is big, the two is slightly more important than the latter compared to the former;On the one hand it is expected production
Put into that small, output is big, the two is suitable compared to importance, and judgment matrix A is:
;
The second level:Including three production water requirement, input, output index matrixs, analyzed using matrix group, water requirement matrix
Including grain-production water requirement ET and irrigation water accounting two indices, it is expected that cereal crops breeding time ET values are small, irrigation water accounts for ET
Ratio it is low, with the shortage of agricultural production water amount, the significance level of two indices is suitable, and judgment matrix is:;
Absorption matrix includes production cost, cost of land two indices, it is expected that production cost is small, cost of land is small, and index is important
Property is ordered as a little higher than cost of land of production cost, judgment matrix:
;
To matrixB 1、B 2Maximum characteristic root calculating is carried out, determines its corresponding feature vector;
Normalized step:, input small, output greatly criterion few with water requirement chooses element standard value, and wherein ET, irrigation water account for
Than, production cost, cost of land using minimum value as standard value, use standard value divided by various regions actual value as normalization after standard
Change value, major product yield use various regions actual value divided by standard value as the standardized value after normalization to be up to standard value;
The step of suitable water plantation is judged:Multiple cereal crops, which are calculated, using following formula fits water plantation comprehensive scoreVValue:
In formula,Water, which is fitted, for crop i plants comprehensive score;For the standard value of crop i water requirements;Water is needed for crop i
The actual value of amount;For the standard value of crop i irrigation water accountings;For the actual value of crop i irrigation water accountings;For
The standard value of crop i production costs per acre;For the actual value of crop i production costs per acre;For the soils per acre crop i
The standard value of cost;For the actual value of crop i cost of land per acre;For the standard value of crop i grain yields per acre;For the actual value of crop i grain yields per acre;
It will be multipleVValue is ranked up, and is drawn respectively eachVThe decline curve of value, according to V value slope of curve constant intervals, in conjunction with grinding
Study carefully the actual conditions of region cereal crops, analyzes the suitable water plantation combination distinguishing section for determining survey region.
The beneficial effect comprise that:The present invention is based on Virtual water, water footprints theories, are built with Hierarchy Analysis Method
Vertical staple food crop fits the discrimination formula of water plantation, and is proposed using the formula and differentiate that interzone staple food crop fits water
The method of plantation.The method is objective, comprehensive reflection grain-production and water resource use, i.e. effective rainfall and duty,
Space characteristics are that the rationalization utilization of agricultural water resources and staple food crop fit water planting structure distribution and provide scientific basis.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is the flow chart of the embodiment of the present invention the method;
Fig. 2 is the decline curve schematic diagram of the suitable water plantation integrated value of the wheat in the application example of the present invention.
Specific implementation mode
Embodiment:
The present embodiment is a kind of method that differentiation interzone staple food crop fits water plantation, and process is as shown in Figure 1.The present embodiment
Calculated or combined water resource assets irrigation requirement inquiry system to obtain crop water, blue water accounting according to meteorological data,
In conjunction with China《National agricultural product cost-benefit data compilation》Production cost, cost of land, major product yield data establish master
Cereal crops are wanted to fit the discrimination formula of water plantation, the suitable water of analysis staple food crop spatially is planted feature, filled to realize
Divide using clear water, save using blue water, reasonably optimizing grain-production space layout and Agricultural Water safety analysis offer technology branch
Support.
The present embodiment is few with water consumption, input is small, and output greatly target setting fits water and plants discriminant criterion, and water consumption lacks mesh
Mark is lower to account for two indexs of ET ratios using cereal crops Evapotranspiration ET (mm) He Lanshui, uses and is produced under input Small object
Originally, two indexs of cost of land, output is lower greatly to use one index of major product yield, but is not limited only to this several targets, studies
Person can flexibly increase the element that need to be considered according to actual conditions and needs, rationally be adjusted to matrix.
The method detailed process and steps are as follows, the present embodiment is divided with the national areas of China and agricultural crops are
Example:
1, crop water demand calculation
(1)The whole nation is divided into several regions first, in accordance with the features such as landform, weather, socio-economic development situation.Collect each area
Domain staple food crop breeding time and breeding time relevant meteorological data, rainfall data etc..Staple food crop can be divided into water
Rice further can be subdivided into early rice, semilate rice and late rice, wheat by rice, wheat, corn, other cereal, potato etc. as needed
It is subdivided into winter wheat, spring wheat, corn is subdivided into spring maize, summer corn.
(2)Object is allocated as by the gross water requirement calculated in ten days in breeding time.By Penman formula(Penman-Menteith)Based on ten days
The cereal crops evapotranspiration in the areas Suan GeET 0, in conjunction with crop coefficient obtain in different cereal crops breeding times by ten days water requirement.
(1)
(2)
In formula, Δ is saturation vapour pressure-temperature curve slope;R n To input the net radiation of crop canopies;GIt is consumed for gain of heat soil
Energy;γFor hygrometer constant;TFor temperature on average;U 2For 2m high wind speeds;e a For saturation vapour pressure;e d For actual observation steam
Pressure;Kc i For i kind cereal crops coefficients;It is i kinds cereal crops by the water requirement in ten days, unit。
(3)Object is allocated as by the effectiv precipitation calculated in ten days in breeding time.Ten days precipitation with each meteorological site in region is
Basis calculates areal rainfall, in conjunction with the water demand of crop in ten days, in zoning difference cereal crops breeding time with Thiessen polygon method
Effectiv precipitation.
(3)
In formula,It is subregion by ten days precipitation magnitude, unit;It is single for the effectiv precipitation of each subregion i kind cereal crops
Position。
(4)Irrigation requirement calculates.The effective rainfall in growth period is drawn in cereal crops growth first(Clear water), no
Foot point is again by duty(Lan Shui)Supplement.
(4)
In formula,For the irrigation requirement of each subregion i kind cereal crops, unit。
(5)Different cereal crops indigo plant water(Irrigation water)AccountingIt calculates
(5)
2, the production estimation element characteristic vector analysis based on analytic hierarchy process (AHP):
(1), input small, output greatly criterion few with water consumption, using analytic hierarchy process (AHP) to multiple target, multiple criteria, amorphousness
Complicated grain biological production system carry out comprehensive diagnos, according to the classification and level between each production factors of cereal crops, carry out
Organic assembling and distinguishing hierarchy establish progressive hierarchical structure, and integration objective maximum is acquired using two-stage index judgment matrix group.Layer
Secondary analysis scale meaning is listed in table 1.
1 step analysis scale meaning of table
(2)Two-stage index judgment matrix group is as follows:
The first order:Including production water requirement, Productive statistics, production output three classes index.Increased using water resource, volume increase for saving
For receipts, on the one hand it is expected that production water requirement is small, output is big, the two is slightly more important than the latter compared to the former;On the one hand it is expected production
Put into that small, output is big, the two is suitable compared to importance, according to the standard of weight analysis(Table one), judgment matrix A is:
The second level:Including three production water requirement, input, output index matrixs, analyzed using matrix group.Water requirement matrix
Including grain-production water requirement ET(mm)With irrigation water accounting two indices, it is expected that cereal crops breeding time ET values are small, irrigation water
The ratio for accounting for ET is low, and with the shortage of agricultural production water amount, the significance level of two indices is suitable, and judgment matrix is such asInstitute
Show.Absorption matrix includes production cost(Member/mu), cost of land(Member/mu)Two indices, it is expected that production cost is small, soil at
This is small, and index importance is ordered as a little higher than cost of land of production cost, and judgment matrix is such asIt is shown.Output matrix is only led
Product yield(kg/hm2)One index.
(3)Maximum characteristic root calculating is carried out to above-mentioned matrix, determines its corresponding feature vector(Table 2).
2 target layers structure of table and weight score value
3, normalization is judged with the plantation of suitable water:
(1), input small, output greatly criterion few with water requirement chooses element standard value, wherein ET, irrigation water accounting, is produced into
Originally, cost of land uses standard value divided by various regions actual value as the standardized value after normalization, main product using minimum value as standard value
Product yield uses various regions actual value divided by standard value as the standardized value after normalization to be up to standard value.Lacking basis
Crop in China producing region in 2015 can be used in data or in the case of not having special high request to result of calculation, each element standard value
Analog value calculates(Table 3).
3 2015 years cereal crops production factors indicators standard values of table
Crop based on analytic hierarchy process (AHP) fits water and plants discrimination formula:
(6)
In formula,Water, which is fitted, for crop i plants comprehensive score, dimensionless;For the standard value of crop i water requirements(Take minimum
Value), unit mm,For the actual value of crop i water requirements, unit mm;For the standard value of crop i irrigation water accountings(It takes most
Small value), dimensionless;For the actual value of crop i irrigation water accountings, dimensionless;For the mark of crop i production costs per acre
Quasi- value(It is minimized), identical element/mu;For the actual value of crop i production costs per acre, identical element/mu;For crop i
The standard value of cost of land per acre(It is minimized), identical element/mu;For the actual value of crop i cost of land per acre, unit
Member/mu;For the standard value of crop i grain yields per acre(It is maximized), units/kg/hm2;For crop i grains per acre
The actual value of yield, units/kg/hm2。
(2)Staple food crop is fitted water implanting and is differentiated:
Using formula(6)Rice, wheat, corn crop comprehensive evaluation value that Chinese main food production in 2015 saves is calculated(V
Value), by sorting from big to small, it is as a result listed in table 4, the decline curve of three kinds of cereal crops V values is drawn respectively, according to V value curves
Slope variation section, in conjunction with 13 grain main products provinces of China and grain ration(Paddy and wheat)The actual conditions of big producing province, point
Analysis determines suitable water plantation comprehensive distinguishing section(Referring to Fig. 2), rice, wheat, corn crop fit water plantation and differentiate that section is listed in table
5。
Table grain-production in 4 2015 years, which saves, fits water plantation integrated value analysis result
5 staple food crop of table fits water plantation integrated value V and differentiates section
Table 5 give three kinds of crops the hydrophile of CHINESE REGION range.For directly calculating V values between a certain area, and
By table 5 can obtain this area whether suitable planting rice, wheat or corn.If increasing the type of crop, Huo Zhegai
Become survey region, the method, can obtain larger range of comprehensive conclusion through this embodiment.
Finally it should be noted that above be merely illustrative of the technical solution of the present invention and it is unrestricted, although with reference to preferable cloth
The scheme of setting describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the technology of the present invention
Scheme(Such as the dividing mode in area, the utilizations of various formula, step sequencing etc.)It is modified or replaced equivalently,
Without departing from the spirit of the technical scheme of the invention and range.
Claims (1)
1. a kind of method for differentiating interzone staple food crop and fitting water plantation, which is characterized in that the step of the method is as follows:
The step of dividing region:Extensive area classification is divided into according to the characteristics of landform, weather, socio-economic development situation
Several survey regions;It collects each survey region staple food crop breeding time, provided with breeding time relevant meteorological data, rainfall
Material;
The step of crop divides:Cereal crops are divided into i class cereal crops, and i is natural number, represents rice, wheat, corn, height
One kind in fine strain of millet, sweet potato, sweet potato, purple sweet potato;
The step of cereal crops water requirement being calculated by ten days:
I class cereal crops evapotranspiration of the survey region by ten days is calculated by formulaET 0:
Wherein:Δ is saturation vapour pressure-temperature curve slope;R n To input the net radiation of crop canopies;GIt is consumed for gain of heat soil
Energy;γFor hygrometer constant;TFor temperature on average;U 2For 2m high wind speeds;e a For saturation vapour pressure;e d For actual observation steam
Pressure;
Group cereal crops water requirement of the survey region by ten days is calculated by formulaET i :
ET i = ET 0×Kc i
Wherein:Kc i For i kind cereal crops coefficients;
The step of effective precipitation in cereal crops growth period being calculated by ten days:Using in region each meteorological site ten days precipitation as base
Plinth calculates areal rainfall, in conjunction with the water demand of crop in ten days, in zoning difference cereal crops breeding time with Thiessen polygon method
Effectiv precipitation:
PE i = f(P)= min(P,PE i )
In formula,PIt is survey region by ten days precipitation magnitude;PE i For the effectiv precipitation of each subregion i kind cereal crops;
The step of irrigation requirement calculates:Effective rainfall in growth period is drawn in cereal crops growth first, insufficient section again by
Duty supplements:
In formula,IR i For the irrigation requirement of i-th kind of cereal crops of each subregion;
The step of irrigation water accounting calculates:Irrigation water proportion in water requirementCalculating:
;
The step of production estimation element characteristic vector analysis:, input small, output greatly criterion few with water consumption, utilizes level
Analytic approach carries out comprehensive diagnos to the complicated grain biological production system of multiple target, multiple criteria, amorphousness, each according to cereal crops
Classification between production factors and level carry out organic assembling and distinguishing hierarchy, progressive hierarchical structure are established, using two-stage index
Judgment matrix group acquires integration objective maximum, step analysis matrix:
The first order:Including production water requirement, Productive statistics, production output three classes index, increased using water resource, volume increase for saving
For receipts, on the one hand it is expected that production water requirement is small, output is big, the two is slightly more important than the latter compared to the former;On the one hand it is expected production
Put into that small, output is big, the two is suitable compared to importance, and judgment matrix A is:
;
The second level:Including three production water requirement, input, output index matrixs, analyzed using matrix group, water requirement matrix
Including grain-production water requirement ET and irrigation water accounting two indices, it is expected that cereal crops breeding time ET values are small, irrigation water accounts for ET
Ratio it is low, with the shortage of agricultural production water amount, the significance level of two indices is suitable, and judgment matrix is:;
Absorption matrix includes production cost, cost of land two indices, it is expected that production cost is small, cost of land is small, and index is important
Property is ordered as a little higher than cost of land of production cost, judgment matrix:
;
To matrixB 1、B 2Maximum characteristic root calculating is carried out, determines its corresponding feature vector;
Normalized step:, input small, output greatly criterion few with water requirement chooses element standard value, and wherein ET, irrigation water account for
Than, production cost, cost of land using minimum value as standard value, use standard value divided by various regions actual value as normalization after standard
Change value, major product yield use various regions actual value divided by standard value as the standardized value after normalization to be up to standard value;
The step of suitable water plantation is judged:Multiple cereal crops, which are calculated, using following formula fits water plantation comprehensive scoreVValue:
In formula:Water, which is fitted, for crop i plants comprehensive score;For the standard value of crop i water requirements;Water is needed for crop i
The actual value of amount;For the standard value of crop i irrigation water accountings;For the actual value of crop i irrigation water accountings;To make
The standard value of object i production costs per acre;For the actual value of crop i production costs per acre;For crop i cost of land per acre
Standard value;For the actual value of crop i cost of land per acre;For the standard value of crop i grain yields per acre;To make
The actual value of object i grain yields per acre;
It will be multipleVValue is ranked up, and is drawn respectively eachVThe decline curve of value, according to V value slope of curve constant intervals, in conjunction with grinding
Study carefully the actual conditions of region cereal crops, analyzes the suitable water plantation combination distinguishing section for determining survey region.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110580657A (en) * | 2019-10-12 | 2019-12-17 | 中国水利水电科学研究院 | agricultural irrigation water demand prediction method |
CN111626526A (en) * | 2020-06-09 | 2020-09-04 | 北京农学院 | Ecological cycle-oriented regional planting, breeding and processing prediction method |
CN114009281A (en) * | 2021-12-07 | 2022-02-08 | 中国农业大学 | Crop planting suitability recommendation method |
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CN111626526B (en) * | 2020-06-09 | 2023-04-07 | 北京农学院 | Ecological cycle-oriented regional planting, breeding and processing prediction method |
CN114009281A (en) * | 2021-12-07 | 2022-02-08 | 中国农业大学 | Crop planting suitability recommendation method |
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