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Acta Agron Sin ›› 2015, Vol. 41 ›› Issue (01): 123-135.doi: 10.3734/SP.J.1006.2015.00123


Adaptability Evaluation of GECROS Simulateing Summer Maize Growth in the Yellow-Huaihe-Haihe Rivers

WU Wei1,2,3,MA Yu-Ping1,*,E You-Hao1,SUN Lin-Li1,2,JING Yuan-Shu2   

  1. 1 Chinese Academy of Meteorological Sciences, Beijing 100081, China; 2 Nanjing University of Information Science & Technology, Nanjing 210044, China; 3 Wuwei County Bureau of Meteorology, Wuwei 238300, China
  • Received:2014-04-30 Revised:2014-09-30 Online:2015-01-12 Published:2014-11-11
  • Contact: 马玉平, E-mail: mayp@cams.cma.gov.cn E-mail:brilliant_ww@163.com


The evaluation of crop model is a key process for its application. GECROS model had been developed by Wageningen in recent years. GECROS uses stronger mechanism and more concise algorithms to summarize the current knowledge of individual physiological processes and their interactions and feedback mechanisms. To provide a foundation for the future localization and regional application of GECROS model, in this study, the field observations of summer maize from several agrometeorological stations in Yellow-Huaihe-Haihe Rivers were used to conduct the adaptability evaluation of GECROS model. The results showed that GECROS model could basically reflect the growing process of summer maize in Yellow-Huaihe-Haihe Rivers. The absolute deviations at the period from emergence to tasseling simulated by GECROS were less than 6.0 d, with an average of 2.1 d. The absolute deviations at the period from tasseling to mature were less than 8.0 d, with an average of 3.4 d. The dry matter accumulation and leaf area expansion process of summer maize were accurately described by GECROS. The normalized mean square root errors (%) of total ear weight simulated by GECROS were 7.8%–33.8%, with an average of 18.6%, and these of total plant weight were 11.2%–32.6%, with an average of 20.7%. The absolute deviations of LAI were 0.28–0.55, with an average of 0.41. The relative evaluation on crop growth and impact of environmental conditions was basically feasible. But the developmental process of summer maize simulated by GECROS had the phenomenon of low values tengding to higher and high values tengding to lower. When the soil water stress was severe, GECROS gave a lower value for the biomass accumulation process, and the overall effect of description for the LAI expansion was inferior to that for biomass accumulation. GECROS still needs to be further improved.

Key words: GECROS, Adaptability, Summer maize, The Yellow-Huaihe-Haihe Rivers

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