Comparison of Crop Model Validation Methods

文献类型: 外文期刊

第一作者: Cao Hong-xin

作者: Cao Hong-xin;Liu Yan;Liu Yong-xia;Yue Yan-bin;Zhu Da-wei;Shi Chun-lin;Ge Dao-kuo;Wei Xiu-fang;Hanan, Jim Scott;Yue Yan-bin;Lu Jian-fei;Sun Jin-ying;Yao An-qing;Tian Ping-ping;Bao Tai-lin

作者机构:

关键词: crop models;validation methods;comparison

期刊名称:JOURNAL OF INTEGRATIVE AGRICULTURE ( 影响因子:2.848; 五年影响因子:2.979 )

ISSN: 2095-3119

年卷期: 2012 年 11 卷 8 期

页码:

收录情况: SCI

摘要: In this paper, the many indices used in validation of crop models, such as RMSE (root mean square errors), S-d (standard error of absolute difference), d(a) (mean absolute difference), d(ap) (ratio of d(a) to the mean observation), r (correlation), and R-2 (determination coefficient), are compared for the same rice architectural parameter model, and their advantages and disadvantages are analyzed. A new index for validation of crop models, d(ap) between the observed and the simulated values, is proposed, with d(ap)<5% as the suggested standard for precision of crop models. The different kinds of validation methods in crop models should be combined in the following aspects: (1) calculating d(a) and d(ap); (2) calculating the RMSE or S-d; (3) calculating r and R-2, at the same time, plotting 1:1 diagram.

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