CN106771056A - A kind of crop coefficient evaluation method based on Plant stress index - Google Patents
A kind of crop coefficient evaluation method based on Plant stress index Download PDFInfo
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- CN106771056A CN106771056A CN201611069938.4A CN201611069938A CN106771056A CN 106771056 A CN106771056 A CN 106771056A CN 201611069938 A CN201611069938 A CN 201611069938A CN 106771056 A CN106771056 A CN 106771056A
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- 238000011156 evaluation Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000008020 evaporation Effects 0.000 claims abstract description 11
- 238000001704 evaporation Methods 0.000 claims abstract description 11
- 230000005068 transpiration Effects 0.000 claims abstract description 10
- 208000005156 Dehydration Diseases 0.000 claims abstract description 7
- 238000003973 irrigation Methods 0.000 claims description 18
- 230000002262 irrigation Effects 0.000 claims description 18
- 239000002689 soil Substances 0.000 claims description 18
- 238000002474 experimental method Methods 0.000 claims description 4
- 238000007796 conventional method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- 238000011160 research Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000009355 double cropping Methods 0.000 description 1
- 230000035558 fertility Effects 0.000 description 1
- 239000003621 irrigation water Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 230000035479 physiological effects, processes and functions Effects 0.000 description 1
- 238000013439 planning Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
- G01N33/246—Earth materials for water content
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0098—Plants or trees
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
- G01N33/245—Earth materials for agricultural purposes
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Abstract
The invention discloses a kind of crop coefficient evaluation method based on Plant stress index, with crop coefficient Kc computing formula be combined crop water stress index CWSI by the evaluation method, is utilized the theory mode of the estimation Kc of actual Methods of Reference Crop Evapotranspiration ETa and CWSI；The evaluation method overcomes the limitation to the requirement of adequate water supply condition during traditional crop coefficient is calculated using the crop actual evaporation transpiration rate ETa data being easily obtained, thus simplifies the measuring and calculating process of crop coefficient.
Description
Technical field：
The present invention relates to agricultural science and technology technical field, specifically a kind of crop coefficient estimation side based on Plant stress index
Method.
Background technology：
The water demand of crop refers to transpiration, soil evaporation among plant, composition under conditions of crop reaches high yield potential value
Water summation required for making object and being consumed in the physiology courses such as photosynthesis.Leaf transpiration and soil evaporation among plant two parts
Methods of Reference Crop Evapotranspiration is referred to as, thing tatol evapotranspiration is typically used as and is represented water requirements of crops.Crop wager requirements refer to reality
The water of consumption, including leaf transpiration, Evaporation among plants and content etc. deep percolation.The water demand of crop and its Changing Pattern
Research is constantly subjected to the attention of domestic and foreign scholars, and critical role is occupied in agricultural production practice.Therefore, crop is accurately determined
Water requirement is very necessary.The base that the crop wager requirements that the water demand of crop is typically under crop coefficient and off-rating are calculated
Plinth and foundation, the determination of the water demand of crop lacks strict specification and unified standard in practical study, with certain master
Randomness is seen, causes the precision and representativeness of the crop coefficient for obtaining accordingly to decrease.
Crop coefficient Kc reflects crop biological characteristics in itself, yield level, regime of soil water and fertility and management water
Influence of the equality to the water demand of crop, determining the method for crop coefficient includes single crop coefficient and dual crop coefficient approach.Nonoculture
Thing coefficient is generally used for irrigation planning and design and irrigation management etc., and dual crop coefficient approach is used for Balance Analysis and irrigates system
Research of degree etc., can calculate daily water demand of crop change.Relevant crop-soil-air is obtained using crop canopy temperature
The characteristic parameter of system, is a focus in agricultural remote sensing research and forward position, and crop canopy temperature is widely used in crop water
Divide the estimation of the quantitative Diagnosis, the water demand of crop and root region soil soil moisture content of situation.Either single crop coefficient or double cropping thing system
Number, is required to crop in exsiccosis, i.e. soil moisture supply be not abundant in crop coefficient calculating.
The content of the invention：
The purpose of the present invention is to overcome the shortcomings of above-mentioned prior art, and provides a kind of crop coefficient based on Plant stress index
Evaluation method, mainly solves the problems, such as that prior art determines crop coefficient requirement adequate water supply.
The technical scheme is that：A kind of crop coefficient evaluation method based on Plant stress index, its special character
It is to comprise the following steps：
A lays experiment field first against specific crop, low water, the reclaimed water moisture solution different with water high is set, wherein low
The soil moisture content of root zone is 40% ± 5% that threshold for irrigation is field capacity before the filling of water process, before the filling of sewerage disposing
The soil moisture content of root zone is 55% ± 5% that threshold for irrigation is field capacity, the soil of root zone before the filling of water process high
Moisture content is 70% ± 5% that threshold for irrigation is field capacity, and the secondary irrigation quantity of each treatment is satisfied with the soil of root zone after filling
Moisture content reaches the requirement of field capacity, and irrigation method chooses the conventional method of this area；
B is being tested to its meteorological factor observational record around field, when the factor of making weather observations includes wind speed, temperature, humidity, sunshine
The number factor, the crop reference evapotranspiration ETo of corresponding period is calculated using FAO-56 formula；
C measures each moisture solution crop field actual evaporation transpiration rate ETa in different bearing stage, the crop water to testing field
Stress index CWSI is divided to synchronize measurement；
Actual evaporation transpiration rate ETa, ETo and corresponding crop water stress index CWSI that d will be obtained are brought into Kc=ETa
/[ ETo（1- CWSI）] in, you can the crop coefficient that different in moisture processes crop is calculated, by different in moisture treatment crop
Crop coefficient obtains the crop coefficient value of the crop by arithmetic average.
Compared with the prior art a kind of crop coefficient evaluation method based on Plant stress index of the present invention has
Prominent substantive distinguishing features and marked improvement：1st, this evaluation method calculates crop water stress index CWSI and crop coefficient Kc
Formula is combined, and obtains the Kc estimation modes based on actual Methods of Reference Crop Evapotranspiration ETa and CWSI, it is intended that using what is be easily obtained
ETa data, to solve the limitation during usual crop coefficient is calculated to the requirement of adequate water supply condition；2nd, this evaluation method is using any
Crop evapotranspiration material computation crop coefficient under moisture condition, and it is not limited solely to the evaporation of the crop under the conditions of adequate water supply
Rising data；3rd, this evaluation method form is simple, and convenience of calculation, it is easy to apply improves computational efficiency.
Specific embodiment：
In order to more fully understand and implement, the present invention is described in detail with reference to embodiment；Illustrated embodiment is only used for explaining this
Invention, is not intended to limit the scope of the present invention.
Embodiment 1, experiment field is laid for specific crop, takes local normal irrigation method to carry out it different
Irrigation water supply treatment, wherein before the filling of low water process root zone soil moisture content（Threshold for irrigation）It is the 40% of field capacity
± 5%, the soil moisture content of root zone before the filling of sewerage disposing（Threshold for irrigation）It is the 55% ± 5% of field capacity, water process high
Filling before root zone soil moisture content（Threshold for irrigation）It is the 70% ± 5% of field capacity, the secondary irrigation quantity of each treatment will expire
The soil moisture content of root zone reaches the requirement of field capacity after being enough to fill, and irrigation method chooses the routine side of this area
Method；Its meteorological factor observational record, the factor of making weather observations are included around experiment field using equipment such as automatic weather stations
The factors such as wind speed, temperature, humidity, sunshine time, are satisfied with crop reference evapotranspirationET o Calculating；Using water balance or
Stage actual evaporation transpiration rate of the other method to the crop fields block to be measuredET a Measure；Meanwhile, to the crop field to be measured
Crop water stress index CWSI synchro measures；The reference crop for calculating the corresponding period using the meteorological factor for observing needs water
AmountET o ；The actual evaporation transpiration rate that will be obtainedET a 、ET o It is brought into corresponding crop water stress index CWSIK c = ET a
/[ ET o （1- CWSI）] in, you can the crop coefficient that different in moisture processes crop is calculated, different in moisture processes the work of crop
Thing coefficient obtains the crop coefficient value of the crop by arithmetic average.
Claims (1)
1. a kind of crop coefficient evaluation method based on Plant stress index, it is characterised in that comprise the following steps：
A lays experiment field first against specific crop, low water, the reclaimed water moisture solution different with water high is set, wherein low
The soil moisture content of root zone is 40% ± 5% that threshold for irrigation is field capacity before the filling of water process, before the filling of sewerage disposing
The soil moisture content of root zone is 55% ± 5% that threshold for irrigation is field capacity, the soil of root zone before the filling of water process high
Moisture content is 70% ± 5% that threshold for irrigation is field capacity, and the secondary irrigation quantity of each treatment is satisfied with the soil of root zone after filling
Moisture content reaches the requirement of field capacity, and irrigation method chooses the conventional method of this area；
B is being tested to its meteorological factor observational record around field, when the factor of making weather observations includes wind speed, temperature, humidity, sunshine
The number factor, the crop reference evapotranspiration ETo of corresponding period is calculated using FAO-56 formula；
C measures each moisture solution crop field actual evaporation transpiration rate ETa in different bearing stage, the crop water to testing field
Stress index CWSI is divided to synchronize measurement；
Actual evaporation transpiration rate ETa, ETo and corresponding crop water stress index CWSI that d will be obtained are brought into Kc=ETa
/[ ETo（1- CWSI）] in, you can the crop coefficient that different in moisture processes crop is calculated, by different in moisture treatment crop
Crop coefficient obtains the crop coefficient value of the crop by arithmetic average.
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| CN201611069938.4A CN106771056A (en) | 2016-11-29 | 2016-11-29 | A kind of crop coefficient evaluation method based on Plant stress index |
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| CN201611069938.4A CN106771056A (en) | 2016-11-29 | 2016-11-29 | A kind of crop coefficient evaluation method based on Plant stress index |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109258417A (en) * | 2018-12-06 | 2019-01-25 | 中国水利水电科学研究院 | A kind of automatic irrigation method |
| CN109345039A (en) * | 2018-11-13 | 2019-02-15 | 中国水利水电科学研究院 | A kind of crop production forecast method comprehensively considering water and saline stress |
| CN111259306A (en) * | 2019-12-31 | 2020-06-09 | 华北水利水电大学 | Method for measuring and calculating crop coefficient in winter wheat area |
| CN115308368A (en) * | 2022-07-26 | 2022-11-08 | 中国农业大学 | Farmland crop water stress diagnosis method and device and electronic equipment |
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| US4876647A (en) * | 1985-05-17 | 1989-10-24 | The Standard Oil Company | Apparatus for determining water stress in crops |
| CN2616908Y (en) * | 2003-04-11 | 2004-05-19 | 中国科学院地理科学与资源研究所 | Crop moisture stress index measuring device |
| WO2010117944A1 (en) * | 2009-04-06 | 2010-10-14 | Martin Tommy J | Remote analysis and correction of crop condition |
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| CN103886392A (en) * | 2014-03-26 | 2014-06-25 | 中国农业科学院农田灌溉研究所 | Winter wheat water consumption predicting method based on weather forecast information |
| CN105260940A (en) * | 2015-10-22 | 2016-01-20 | 南京信息工程大学 | Crop coefficient correction method based on farmland evapotranspiration observation |
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2016
- 2016-11-29 CN CN201611069938.4A patent/CN106771056A/en active Pending
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| US4876647A (en) * | 1985-05-17 | 1989-10-24 | The Standard Oil Company | Apparatus for determining water stress in crops |
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| WO2010117944A1 (en) * | 2009-04-06 | 2010-10-14 | Martin Tommy J | Remote analysis and correction of crop condition |
| CN102402185A (en) * | 2011-11-03 | 2012-04-04 | 北京林业大学 | Deficit irrigation controlling method based on fuzzy control |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109345039A (en) * | 2018-11-13 | 2019-02-15 | 中国水利水电科学研究院 | A kind of crop production forecast method comprehensively considering water and saline stress |
| CN109345039B (en) * | 2018-11-13 | 2021-02-23 | 中国水利水电科学研究院 | Crop yield prediction method comprehensively considering water and salt stress |
| CN109258417A (en) * | 2018-12-06 | 2019-01-25 | 中国水利水电科学研究院 | A kind of automatic irrigation method |
| CN109258417B (en) * | 2018-12-06 | 2021-04-06 | 中国水利水电科学研究院 | Automatic irrigation method |
| CN111259306A (en) * | 2019-12-31 | 2020-06-09 | 华北水利水电大学 | Method for measuring and calculating crop coefficient in winter wheat area |
| CN115308368A (en) * | 2022-07-26 | 2022-11-08 | 中国农业大学 | Farmland crop water stress diagnosis method and device and electronic equipment |
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