| Yield potential of winter wheat in the North China and its EOF analysis |
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| DOI：10.7606/j.issn.1000-7601.2012.05.02 |
| Key Words: North China winter wheat potential yield rainfed yield EOF |
| Author Name | Affiliation | | WU Dingrong | Chinese Academy of Meteorological Sciences, Beijing 100081, China | | LIU Jiandong | Chinese Academy of Meteorological Sciences, Beijing 100081, China | | LIU Ling | Chinese Academy of Meteorological Sciences, Beijing 100081, China | | JIANG Chaoyang | Chinese Academy of Meteorological Sciences, Beijing 100081, China | | YU Qiang | Plant Functional Biology & Climate Change Cluster, University of Technology, Sydney, PO Box 123 Broadway, NSW 2007, Australia |
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| Abstract: |
| Winter wheat experiments were conducted in the Yucheng Comprehensive Experimental Station, Chinese Academy of Sciences, which located in middle of North China. Measurements include wheat developmental stage and dry matter accumulation. Using the experimental data, crop growth model WOFOST was improved, calibrated and validated. Results showed that the model was suitab
le for winter wheat simulation in the North China. The model was then used to simulate winter wheat growth and potential and rainfed yield in 42 weather stations from 1961 to 2006 in the North China. Simulated yields were analyzed using Empirical Orthogonal Function (EOF) method. Simulation results showed that potential yield of winter wheat was higher in the northeast and lower in the southwest plain, and the rainfed yield was higher in the south and lower in the north, which are consist with previous reports. EOF results showed that the most important affecting factor of potential yield was radiation; the second important one was temperature. As to rainfed yield, the most important factor was rainfall; the second one was the comprehensive effects of radiation and temperature. Combined with crop model simulation and EOF method, this research showed the impact degree of different climatic factors in different region, and could offer theoretical support and practical guide to the design of regional agricultural layout. |
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