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1、生态学杂志ChineseJournalofEcology2008,27(6):1021-10283农田光能利用效率研究进展13323同小娟李俊王玲12(北京林业大学省部共建森林培育与保护教育部重点实验室,北京100083;中国科学院地理科学与资源研究所,3北京100101;石河子大学师范学院,新疆石河子832003)摘要光能利用率(RUE)是作物生长模型的主要参数之一。RUE被广泛应用于基于遥感的净初级生产力估算。受环境条件影响,作物生长季内RUE并非常数。RUE估算不准将给净初级生产力的模拟计算带来很大误差。本文分析了农田RUE的测定方法和变化
2、特征,讨论了辐射、温度、饱和差、植物叶片氮含量和作物种类对RUE的影响,分析了目前RUE研究中存在的问题,提出在作物模型中用RUE作参数时必须考虑作物生长发育所引起的RUE变化。今后应加强作物生物量和截获辐射间关系的机理研究。利用涡度相关技术等微气象方法研究短时间尺度上RUE的变化将成为未来研究的热点。关键词农田;光能利用效率;影响因子;净初级生产力中图分类号S963文献标识码A文章编号1000-4890(2008)06-1021-0812Areviewonradiationuseefficiencyofthecropland1TONGXiao2
3、juan,LIJun,WANG31Ling(TheKeyLaboratoryforSilvicultureandConservationofMinistryofEducation,BeijingFor22estryUniversity,Beijing100083,China;InstituteofGeographicSciencesandNaturalResources3Research,ChineseAcademyofSciences,Beijing100101,China;TeachersCollegeofShiheziUni2versity
4、,Shihezi832003,Xinjiang,China).ChineseJournalofEcology,2008,27(6):1021-1028.Abstract:Radiationuseefficiency(RUE)isoneofthemostusefulparametersincropgrowthmodels,andwidelyusedintheremotesensingestimationofnetprimaryproductivity.Duetotheeffectsofenvironmentalfactors,RUEvarieswi
5、thcropgrowth.TheinaccurateestimationofRUEwillleadtolargeerrorsinthesimulationofnetprimaryproductivity.Thispaperanalyzedthede2terminationmethodsofcroplandRUEandthevariationcharacteristicsofRUE,discussedthefac2torscontrollingRUE(e.g.solarradiation,temperature,vaporpressuredefic
6、it,leafnitrogencontent,andcropspecies),andpointedouttheproblemsincurrentRUEstudies.Itwassugges2tedthatwhenusingRUEasaparametertosimulatecropproduction,thevariationofRUEwithcropgrowthshouldbeconsidered.Furtherworksshouldbeenhancedontherelationshipbetweencropbiomassanditsinterc
7、eptedradiation,andhotspotwouldbethestudyofRUEvariationovershortperiodoftimescale(hoursordays)byusingmicrometeorologicalmethodssuchastheeddycovariancetechniquetoprovidereliableparameterforconstructingcarboncyclemodels.Keywords:cropland;radiationuseefficiency;affectingfactors;n
8、etprimaryproductivity.光能利用效率(radiationuseefficiency,RUE)通用的动态简化,但当其他
