INTEGRATING REMOTELY SENSED LAI WITH EPIC MODEL BASED ON GLOBAL OPTIMIZATION ALGORITHM FOR REGIONAL CROP YIELD ASSESSMENT

文献类型: 外文期刊

第一作者: Ren, Jianqiang

作者: Ren, Jianqiang;Yu, Fushui;Chen, Zhongxin;Tang, Huajun;Ren, Jianqiang;Yu, Fushui;Chen, Zhongxin;Tang, Huajun;Qin, Jun

作者机构:

关键词: Crop growth model;EPIC;data assimilation;remote sensing;global optimization algorithm;yield estimation;LAI

期刊名称:2010 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM

ISSN: 2153-6996

年卷期: 2010 年

页码:

收录情况: SCI

摘要: Assimilating external data into crop growth model to improve accuracy of crop growth monitoring and yield estimation has been being a research hotspot in recent years. In this paper, the global optimization algorithm SCE-UA (Shuffled Complex Evolution method - University of Arizona) was used to integrate remotely sensed leaf area index (LAI) with crop growth model EPIC to simulate regional yield, sowing date, plant density and net nitrogen fertilizer application rate of summer maize in Huanghuaihai Plain. The final results showed that average relative error of estimated summer maize yield was 4.37% and RMSE was 0.44t/ha. Meanwhile, compared with actual observation and investigation data, average relative error of simulated sowing date, plant density and net N fertilization application rate was 1.85%, -7.78% and -10.60% respectively. These above accuracy of simulated results could meet the need of crop monitoring at regional scale. It was proved that integrating remotely sensed LAI with EPIC model based on global optimization algorithm SCE-UA for simulation of crop growth condition and crop yield was feasible.

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