利用RZWQM-CERES模拟华北平原农田土壤水分动态及其对作物产量的影响

被引:54
作者
房全孝 [1 ]
于强 [2 ]
王建林 [1 ]
机构
[1] 青岛农业大学农学与植物保护学院
[2] 中国科学院地理科学与资源所
关键词
RZWQM-CERES; 华北平原; 模型参数; 土壤水分; 作物产量;
D O I
暂无
中图分类号
S154.4 [土壤-植物系统];
学科分类号
090301 [土壤学];
摘要
农业系统模型是农业生产多元目标优化管理的重要工具,但由于系统模型过程复杂,参数众多,校正和验证工作一直是模型研究的重点和难点。本文利用RZWQM(Root Zone Water Quality Model)与CERES(Crop Environment Resource Synthesis)的结合模型RZWQM-CERES模拟土壤水分及作物产量进行了参数优化和验证,结果表明,RZWQM-CERES在禹城站和栾城站模拟不同灌溉处理土壤贮水量与测定值呈相似的变化趋势,均方根差(RMSE)分别为2.38~2.70cm及3.49~3.73cm;作物产量模拟结果与实测值对土壤水分的响应趋势一致(R2=0.83***,n=22),其中在禹城站模拟小麦和玉米产量的RMSE分别为550kghm?2和580kghm-2,栾城站模拟小麦产量的RMSE为670kghm-2。以上结果表明RZWQM-CERES可作为华北平原模拟和分析土壤水分对作物产量影响的有效工具。本文初步建立了一套适合华北平原作物生产的模型参数,为利用RZWQM-CERES建立农田水分优化调控策略奠定了基础,并探讨了模型评价过程中应注意的问题。
引用
收藏
页码:1122 / 1130
页数:9
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