紅外氣體分析法測定單葉光合速率常見問題及誤差分析.pdf

1、中國農(nóng)業(yè)大學碩士學位論文紅外氣體分析法測定單葉光合速率常見問題及誤差分析姓名：黃彬香申請學位級別：碩士專業(yè)：氣象學指導教師：施生錦20030601SomequestionsandErrorAnalysisaboutMeasurementofGasExchangeinLeafPhotosyntheticRateAbs仃actToanalyzethequestionsanderrorsoccurredinmeasuringtheleafPh

2、otosyntheticrateusingGasexchange，instrumentalerrorobservationerrorandbiologyerrorintheUSeofportablephotosynthesissystemwerecomputedandanalyzedTheresultsshowthatinstrumentalerrorinopensystemiSmorethan3％ThemainelTorisowing

3、toC02analyzerandflowmeterAndinstrumentalerrorinclosedsystemismorettlan15％ThemainerrorisowingtoC02analyzerErrorisdecidedinthelevelofphotosynthesisbothofthemComparatively，theinstrumenterrorofopensystemisbiggerthanthatofclo

4、sedsystemespeciallyunderthelowerphotosynthesisFurthermore，choosingtherightleafchamberandthereasonablemeasurementofleafareaisimportantespeciallyTheerrorscausedbyenvironmentfactorsduringthecomparablemeasurementofleafphotos

5、ynthesisarebigespeciallyinthemorningandeveningandincreaserapidlyalongwithextensionofthemetricaldurationTheerrorcausedbythechangeofradiationismorethan40％inthemorningandeveningandislessthan5％intheresttimeTheerrorcausedbyth

6、echangeoftemperaturefluctuatesobviouslyfrom20％to40％Butitislessthan10％about8antand14pmTheerrorcausedbythechangeofC02concentrationisrelativesteadyfrom10％to20％Inonewordtheerrorcausedbyenvironmentfactorsfrom8amto14pmislessan

7、dmoresteadythaninothertimeButtheerrorscausedbychangeofenvironmentfactorsinshorttimeislessthan5％Theerrorcausedbydifferentpartofoneleafisfrom10％to40％andbiggerthanthatcausedbydifferentleavesWhenthechangeofradiationenvironme

8、nthasinstantaneouschange，thePhotosyntheticratecantreachtheratethatitshouldbeinthechangedsituationThatiscalledthephotoperiodicinductionUsuallythetimeofthephotopedodieinductionisfrom3minuteto8minuteTheerrorcausedbythephoto

9、periodicinductionchangesalongwiththeinitiatoryandterminativeradiationlevelAndtheeffectofPhotosyntheticoscillationsshouldbeemphasizedinfastmeasurementofphotosynthesisKeywords：GasexchangeLeafPhotosyntheticRateErrorAnabq虹Il