中国农业气象

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“中国农业系统模型”在长江流域的适应性检验及其模拟应用

郝菁;申双和;   

  1. 南京信息工程大学应用气象学院;
  • 出版日期:2009-08-10 发布日期:2009-08-10
  • 基金资助:
    世界自然基金项目“长江流域气候变化脆弱性评估”(2236)

Adaptive Validation of ChinaAgrosys Model and Its Simulative Application in Yangtze River Basin

HAO Jing,SHEN Shuang-he(College of Applied Meteorology,Nanjing University of Information Science & Technology,Nanjing 210044,China)   

  • Online:2009-08-10 Published:2009-08-10

摘要: 利用水稻生长观测资料和气象资料,对"中国农业系统模型(ChinaAgrosys)"在整个长江流域水稻发育期、叶面积指数和生物量方面的模拟能力进行了综合评价。模型检验结果显示:发育期、叶面积指数和生物量的模拟值与观测值的均方根误差(RMSE)分别为4.4d、2.4、2010 kg.hm-2,相对误差分别在-10%~11%、-30%~30%、-23%~24%,表明该模型可以用于长江流域历史和未来时期水稻的生育期、叶面积指数和生物量的模拟研究。利用此模型模拟了1955-2005年流域30个站点历年一季稻生物产量,并计算了各点的逐年变化趋势。结果表明:过去51a长江流域一季稻生物产量总体呈下降趋势,这可能与近年来流域夏季降水增多、日照时数减少有关。

关键词: 水稻, 长江流域, 中国农业系统模型, 模型适应性

Abstract: Based on the observation data of rice,meteorological data and ChinaAgrosys model,comprehensive evaluation on the modeling adaptability for rice growth duration(GD),leaf area index(LAI),biomass were developed in the Yangtze River basin.The results showed that root mean square error between the simulation value and observed value were 4.4days,2.4,2010 kg ha-1 for GD,LAI and biomass respectively,and relative error were-10% to 11 %,-30% to 30 % and-23 % to 24% respectively.It indicated that ChinaAgrosys might apply to GD,LAI and biomass of rice in Yangtze River basin.The rice biomass in 30 sites in Yangtze River basin from 1955 to 2005 was also simulated,and it showed that the rice biomass on the Yangtze River basin decreased gradually in past 51 years.It probably because the precipitation increased while the sunshine duration decreased during recent years.

Key words: Rice, Rice, Yangtze River Basin, ChinaAgrosys, Modeling adaptability