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《AquaCrop模型在西北胡麻生物量及产量模拟中的应用和验证.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中国生态农业学报2014年1月第22卷第1期ChineseJournalofEco—Agriculture,Jan.2014,22(1):93—103DoI:10.3724/SP.J.1011.2014.30650AquaCrop模型在西北胡麻生物量及产量模拟中的应用和验证木李胡牛俊义2郭丽琢2高珍妮孙小花2(1.甘肃农业大学信息科学技术学院兰州730070;2.甘肃农业大学农学院兰州730070)摘要为了预测水分和养分对胡麻籽粒产量、生物量与水分生产率的影响,使用FAO研发的水分驱动作物模型AquaCrop对胡麻在不同灌溉与氮磷水平下的生长
2、情况进行模拟和验证。试验分别于2011年、2012年在甘肃省榆中县良种场进行,试验设置4个灌溉水平,3个氮水平,3个磷水平。模型性能的评价采用模型效率(、决定系数。1、均方根误差(RMSE)和平均绝对误差(MAE)等统计指标。分析结果表明:AquaCrop模型校正的籽粒产量和生物量在不同灌溉与氮磷水平处理下的预测误差统计值为:0.973、.hm)基本一致;同时,群体覆盖(cCr)与生物量的模拟结果与测定值也非常拟合。AquaCrop模型在充分灌溉处理下预测胡麻产量,比非充分灌溉处理下具更高的准确性。因而,水分驱动模型AquaCrop在西北胡麻区不同的灌溉与田间管理措施下有较高的模拟精确性,具有广阔的应用前景和价值。关键词AquaCrop模型胡麻作物灌溉氮磷校正验证中图分类号:$565.3;S3—33文献标识码:A文章编号:1671—3990(2014)01.0093.11ApplicationandvalidationofAquaCropmodelinsimulatingbi4、omassandyieldofoilflaxinNorthwestChinaLIYue,NIUJunyi2GUOLizhuo,GAOZhenni,SUNXiaohua2,(1.CollegeofInformationScienceandTechnology,GansuAgriculturalUniversity,Lanzhou730070,China;2.CollegeofAgronomy,GansuAgriculturalUniversity,Lanzhou730070,China)AbstractManycrop—growthmodels5、havebeenestablishedforpredictingtheefectsofsoil,waterandnutrientongrain/biomassyieldandwaterproductivityofdiferentcrops.However,mostofthecrop—growthmodelswerestillatresearchstageandonlyfewhavebeenappliedinactualproductionprocessesduetolimitationsinsimulationinputdata.Topred6、icttheinfluenceofwaterandnutrientonyield,biomassandwaterproductivityofoilflax,awater-drivencropmodel,AquaCropmodel,developedbyFAOwasusedtosimulateandvalidatethegrowthofoilflaxunderdifferentirrigationandnitrogen/phosphoruslevels.Inthestudy,fieldexperimentwith9nutrientstreatm7、ents(3nitrogenlevelsand3phosphoruslevels)underfourirrigationlevelswereconductedatYuzhongFieldStation.Theexperimentaldatacollectedin2011wasusedtosimulateyield,biomassandcanopycoveranddatacollectedin2012tovalidatethemode1.Theperformanceofmodelwasevaluatedfrommodeleficiency㈣,d8、eterminationcoeficient(),rootmeansquareroot(RMSE)andmeanabsoluteerror(.Theresultss
3、.hm)基本一致;同时,群体覆盖(cCr)与生物量的模拟结果与测定值也非常拟合。AquaCrop模型在充分灌溉处理下预测胡麻产量,比非充分灌溉处理下具更高的准确性。因而,水分驱动模型AquaCrop在西北胡麻区不同的灌溉与田间管理措施下有较高的模拟精确性,具有广阔的应用前景和价值。关键词AquaCrop模型胡麻作物灌溉氮磷校正验证中图分类号:$565.3;S3—33文献标识码:A文章编号:1671—3990(2014)01.0093.11ApplicationandvalidationofAquaCropmodelinsimulatingbi
4、omassandyieldofoilflaxinNorthwestChinaLIYue,NIUJunyi2GUOLizhuo,GAOZhenni,SUNXiaohua2,(1.CollegeofInformationScienceandTechnology,GansuAgriculturalUniversity,Lanzhou730070,China;2.CollegeofAgronomy,GansuAgriculturalUniversity,Lanzhou730070,China)AbstractManycrop—growthmodels
5、havebeenestablishedforpredictingtheefectsofsoil,waterandnutrientongrain/biomassyieldandwaterproductivityofdiferentcrops.However,mostofthecrop—growthmodelswerestillatresearchstageandonlyfewhavebeenappliedinactualproductionprocessesduetolimitationsinsimulationinputdata.Topred
6、icttheinfluenceofwaterandnutrientonyield,biomassandwaterproductivityofoilflax,awater-drivencropmodel,AquaCropmodel,developedbyFAOwasusedtosimulateandvalidatethegrowthofoilflaxunderdifferentirrigationandnitrogen/phosphoruslevels.Inthestudy,fieldexperimentwith9nutrientstreatm
7、ents(3nitrogenlevelsand3phosphoruslevels)underfourirrigationlevelswereconductedatYuzhongFieldStation.Theexperimentaldatacollectedin2011wasusedtosimulateyield,biomassandcanopycoveranddatacollectedin2012tovalidatethemode1.Theperformanceofmodelwasevaluatedfrommodeleficiency㈣,d
8、eterminationcoeficient(),rootmeansquareroot(RMSE)andmeanabsoluteerror(.Theresultss
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