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1、生態(tài)學(xué)雜志ChineseJournalofEcology2008,27(6):1021-10283農(nóng)田光能利用效率研究進(jìn)展13323同小娟李俊王玲12(北京林業(yè)大學(xué)省部共建森林培育與保護(hù)教育部重點(diǎn)實(shí)驗(yàn)室,北京100083;中國(guó)科學(xué)院地理科學(xué)與資源研究所,3北京100101;石河子大學(xué)師范學(xué)院,新疆石河子832003)摘要光能利用率(RUE)是作物生長(zhǎng)模型的主要參數(shù)之一。RUE被廣泛應(yīng)用于基于遙感的凈初級(jí)生產(chǎn)力估算。受環(huán)境條件影響,作物生長(zhǎng)季內(nèi)RUE并非常數(shù)。RUE估算不準(zhǔn)將給凈初級(jí)生產(chǎn)力的模擬計(jì)算帶來(lái)很大誤差。本文分析了農(nóng)田RUE的測(cè)定方法和變化
2、特征,討論了輻射、溫度、飽和差、植物葉片氮含量和作物種類對(duì)RUE的影響,分析了目前RUE研究中存在的問(wèn)題,提出在作物模型中用RUE作參數(shù)時(shí)必須考慮作物生長(zhǎng)發(fā)育所引起的RUE變化。今后應(yīng)加強(qiáng)作物生物量和截獲輻射間關(guān)系的機(jī)理研究。利用渦度相關(guān)技術(shù)等微氣象方法研究短時(shí)間尺度上RUE的變化將成為未來(lái)研究的熱點(diǎn)。關(guān)鍵詞農(nóng)田;光能利用效率;影響因子;凈初級(jí)生產(chǎn)力中圖分類號(hào)S963文獻(xiàn)標(biāo)識(shí)碼A文章編號(hào)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)通用的動(dòng)態(tài)簡(jiǎn)化,但當(dāng)其他
