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2011-7-29 Jianqiang REN 1,2 , Zhongxin CHEN 1,2 , Huajun TANG 1,2 , Fushui YU 1,2 , Qing HUANG 1,2 Simulation of regional winter wheat yield  by combining  EPIC model and remotely sensed LAI  based on global optimization algorithm 1  Key Laboratory of Resources Remote-Sensing & Digital Agriculture, Ministry of Agriculture, China  2  Institute of Agricultural Resources & Regional Planning, Chinese Academy of Agricultural Sciences 1/24
Outline 2/24 Introduction 1 Study area 2 Method 3 3 Data preparation 4 4 Results and analysis 5 Conclusions and future work 6
1. Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],3/24
1. Introduction ,[object Object],[object Object],[object Object],[object Object],4/24
1. Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
1. Introduction ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],5/24
2. Study area ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Winter wheat :   sowed (3rd 10-day of September----2nd 10-day of October)  mature (1st 10-day of June ----- 2nd 10-day of this month)  Ground survey plots:  75 in the year of 2004 and 2008 29 survey plots (in 2004) and 46 plots (in 2008)  6/24
3. Method ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],7/24 Flowchart of this research
3. Method 3.1 Crop growth model EPIC   (Environmental Policy Integrated Climate)   ,[object Object],[object Object],[object Object],Where IPAR is intercepted photosynthetically active radiation; RA is solar radiation; BE is the crop parameter for converting energy to biomass; REG is the value of the minimum crop stress factor; B AG  is the aboveground biomass in T/Ha for crop; HI is the harvest index  8/24
3.2. Global optimization algorithm SCE-UA  (Duan, 1994) 3. Method ,[object Object],[object Object],[object Object],[object Object],[object Object],9/24
3. Method 3.3. Model parameters calibration 10/24
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],3. Method 3.3. Model parameters calibration 11/24
3. Method 3.4. Model assimilation parameters ,[object Object],[object Object],[object Object],[object Object],12/24
3. Method 3.5. Validation of results ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13/24
4. Data preparation 4.1. Basic data collection and process ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],14/24
4. Data preparation 4.2. Field observation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],15/24
4. Data preparation 4.3. LAI retrieved from MODIS NDVI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Result of remotely sensed LAI (2008, 113  rd  day)  16/24
4. Data preparation 4.4. Other auxiliary data ,[object Object],[object Object],[object Object],[object Object],17/24
5. Results and analysis 5.1. Result of simulated sowing date of winter wheat (2007) ,[object Object],[object Object],[object Object],18/24
5. Results and analysis 5.2. Result of simulated plant density of winter wheat (2008) ,[object Object],[object Object],[object Object],19/24
5. Results and analysis 5.3. Result of simulated N fertilization application rate (2008) ,[object Object],[object Object],[object Object],20/24
5. Results and analysis 5.4. Result of simulated winter wheat yield (2008) ,[object Object],[object Object],[object Object],21/24
6. Conclusions and future work ,[object Object],[object Object],[object Object],6.1 Conclusions 22/24
6. Conclusions and future work ,[object Object],[object Object],[object Object],[object Object],[object Object],6.2 Future work ( Discussion ) 23/24
谢  谢 ! Thanks for your attention! [email_address] 24/24

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Jianqiang Ren_Simulation of regional winter wheat yield by EPIC model.ppt

  • 1. 2011-7-29 Jianqiang REN 1,2 , Zhongxin CHEN 1,2 , Huajun TANG 1,2 , Fushui YU 1,2 , Qing HUANG 1,2 Simulation of regional winter wheat yield by combining EPIC model and remotely sensed LAI based on global optimization algorithm 1 Key Laboratory of Resources Remote-Sensing & Digital Agriculture, Ministry of Agriculture, China 2 Institute of Agricultural Resources & Regional Planning, Chinese Academy of Agricultural Sciences 1/24
  • 2. Outline 2/24 Introduction 1 Study area 2 Method 3 3 Data preparation 4 4 Results and analysis 5 Conclusions and future work 6
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  • 25. 谢 谢 ! Thanks for your attention! [email_address] 24/24