植物冠层分析仪测定荆条孤立冠层叶面积指数和透光率的分析

ChineseJournalofAgrometeorology2014doi10．3969/j．issn．1000－6362．2014．04．003．J．2014354373－379*111＊＊211.4500022.454000LAI-2200PCA8VitexnegundoL．LAIPCA3.5～6.5DIFNLI-200SAτLAILAIPCALAI、DIFNτ。1P＜0.01LAIPCALAI2.57%LAI-2200LAI。2LAI-2200PCADIFNτP＜0.01LAI-2200PCA。。LAI-2200LAIandLightTransmittanceMeasurementofIsolatedVitexShrubUsingLAI-2200PCACHENJing-ling1WANGJing1WANGQian1JIAChang-rong2KOUYuan-bo11.HenanAgriculturalUniversityZhengzhou450002China2.DagouheForestFarmofJiyuanCityHenanProvinceJiyuan454000AbstractUsingthePlantCanopyAnalyzerPCAauthorsnondestructivelymeasuredtheleafareaindexLAIPCAanddiffusenone-interceptanceDIFNof8isolatedVitexnegundoL．canopies．ThelighttransmittanceτwasmeasuredusingLI-200SAsensorandLAIharvestofthe8canopieswasmeasuredusingharvestingmethodtotaldefoliation．ThenthecorrelationanddeviationofLAIPCAandLAIharvestalsoDIFNandτwerecompared．Theresultsshowedthat1LAIPCAmeasuredbyLAI-2200PCAwascloselyrelatedtoLAIharvestobtainedwiththeharvestingmethodpassedthroughthesignificanttestat0.01reliability．LAIPCAmeasuredbyLAI-2200PCAwas2.57%higherthanthatobtainedwiththeharvestingmethodtotaldefoliationwhichindicatedthatLAI-2200hadsmalldeviationwhenusedtomeasureLAIofisolatedforestcanopy．2DIFNmeasuredbyLAI-2200PCAcloselyrelatedtothelighttransmittanceτmeasuredbyLI-200SAsensorP＜0.01．ItindicatedthatLAI-2200PCAcanbeusedtomeasurevitexshrubisolatedcanopyLAIandlighttransmittancereplacingtotaldefoliationmethod．Thepaperdemonstratedisolatedforestcanopyanalyzingmethodwhichwidelypresentsinthepracticeofforestryproduction．KeywordsIsolatedcanopyCanopyanalyzingLAI-2200DIFNTransmittance1。1-3。1993《》4。《》LAI。LAI5LAI*2013－12－28＊＊。[e-mail]“”31370621“”310713211964－。[e-mail]350.68596LAI0.667。8PCA9-13。LAI-2200PCA14-21、DIFNDiffuseNone-interceptance22。PCALAI、MTA、DIFN。、、、、。、。LAI-2200PCA。PCANilson23LAI-2000、、3Gap。Broadhead24LAI-2000M．volkensiiC．megalocarpusLAILAI-2000LADM．volkensii16%C．megalocarpus8%LAI-2000。LAI-2200PCALAILAI-2200PCA。11.1LAI-2200PCAFV-2200。LI-14001400-301LI-200SA。1.0～2.0mPCALAI-2200DIFN。1.21.2.134°48'N113°39'E8。1。X50Z5。XYZ。X000PCAX0cm。PCA。Y0YXZYX、Z。X0LAI-2200PCA1Fig．1TheschematicdiagramofvitexshrubcanopyoutlinecoordinatesX000PCAX10Z1－X50Z5FV2200NoteX000pointwasmeasuringpointofsolarradiationsensorandfisheyelensofPCAX10Z1－X50Z5aresomeoutlinecoordinatepointsofcanopyforFV2200canopyre-computing·473·4FV2200X0。X0。1.2.22013713。X000LI-200SALI-200SA。LI-200SALI-1400LI-14005min。LI-200SA8。LI-1400。1.2.3PCALAI、DIFN2013715。。XZ。。。1。FV2200。LAI-2200“14”LAI-22001X0004PCALAIDIFNLAI。FV2200“”LAIＲS-232LAI-2200LAI-2200PCA8。FV2200FV2200“Ｒecompute”。①“”“Isolatedcomputed”②“”XZX10Z1－X50Z5mXZ③“”LI－2200X000X0④“”。360°。OKFV2200DriplineLAIDLLAILAI。DIFNPCA。DIFN。PCAFV2200LAIDIFN。DIFNPCA、。LAI-2200PCA0°～74°57°、23°、38°、53°、68°“”50°～74°。1.2.4LAI8。。。Photoshop“”“”。。。X1X1。。1.3LAI-22001、。θPθP()θ=e－GθμSθ1·573·35G()θ。S()θθ。θ。μμ=2∫π20－lnP()θS()θsinθdθ2hSθ=hcosθ3LAILAI=μh4324LAI=2∫π20－lnPθcosθsinθdθ55。LAI－2200。2。5－lnPθ5。LAI－22005LAI-2200FV2200。5lnPθlnPθ。Ｒyu25Li-corμ=2∫π20－lnPθSθsinθdθ664LAI。22.1LAI-2200DIFNLI-1400LI-200SA82。2a。39.71%DIFN0.396110.33%DIFN0.1632。DIFN0.96400.893tT4.872t0.01=3.707。PCADIFNτ2bτ。DIFN±8。DIFNDIFNDIFN。2LAI-2200LI-200SAFig．2Diffusenon-interceptanceDIFNderivedfromLAI-2200vs．lighttransmittancemeasuredbyLI-200SA2.2LAILAI-2200LAILAIFV2200LAIPCALAI3。3LAIPCALAILAI-2200LAILAILAIPCAFV2200。LAIPCA。·673·43LAIFig．3CompareofLAImeasuredbydifferentmeasuringmethods48LAIPCALAI。4a0.9136tT5.50＞t0.01=3.710.01。4bLAI3.5464.14617.0%22.5%8PCA2.57%。PCA。4LAIPCALAIabFig．4ThecorrelationaanddeviationbofLAIPCAandLAIharvest2.3LAI-2200PCA①。。。②。。180°90°、45°FV2200LAI。③。、。。④。PCA。。。。。⑤。。LAI-2200PCA。⑥。。LAI-2200PCA·773·354LAI-2200PCA。。③-⑥。3DIFN±810PCADIFN。22。3.5～6.550%。。2.57%。Broadhead24LADM．volkensii16%C．megalocarpus8%LAI-2200LAI。Villalobos26Cutini2127PrunusaviumJuglansregia。LAI-2200PCALAI。Jin28LADLAI-2000LAD。LAI-2000LAI-2200LAI-2200。Cu-tini27PCALAI。PCA0°～74°5。PCA。LAI-2200Li-corInc．20094。PCA。1．J．2010312230-234．2．J．2008293285-289．3．J．2011322279-282．4．M．199328-30．5．PyWOFOSTJ．2012332245-253．6．LAIHyperionJ．20073345-350．7．SPOT5J．2008257-63．8．J．2008311139-144．9．J．2010312251-254．10．J．200525112862-2867．11．J．20082883779-3788．12．J．2006153166-170．13．‘’J．200835101411-1418．14．49J．20092952514-2519．15．34J．2008282276-280．·873·416．‘’J．201217374-80．17．‘’J．2008322485-490．18．J．20103811115-120．19．、J．201245132607-2617．20．J．201131113090-3100．21CutiniAVaralloA．EstimationoffoliagecharacteristicsofisolatedtreeswiththeplantcanopyanalyzerLAI-2000J．CurrentTrendsinEcology2006149-56．22．LAI-2000J．2006395922-927．23NilsonTKuuskALangMetal．SimulationofstatisticalcharacteristicsofgapdistributioninforeststandsJ．AgriculturalandForestMeteorology20011517895-905．24BroadheadJSMuxworthyAＲOngcCKetal．ComparisonofmethodsfordeterminingleafareaintreerowsJ．AgriculturalandForestMeteorology20031153－4151-161．25ＲyuYNilsonTKobayashiHOetal．OnthecorrectestimationofeffectiveleafareaindexdoesitrevealinformationonclumpingeffectsJ．AgriculturalandForestMeteorology20101503463-472．26VillalobosFJOrgazFMateosL．Non-destruc