广州市城市森林生态系统碳循环研究

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1、硕士学位论文：摘要ABSTRACTGlobalcarboncycleisaVe叮importantissueinthestudyof舀obalclimatechange．ForestecosyStemcarboncycleisoneoftheimpoIrtantpartofglobalcarboncycle，butatthepresenttimethereareconsiderableuncertaintiesintlleresearchofglobalcarboncycle，inforestecosystemscarboncycleresearch，、柚ichespeciall

2、yintheestimationofcarbonStorageofregionforestecosystemsandC02nuxesexchan舀ngwithothersystems．AccurateestimationofthecarbonstorageandC02nuxesandreducetheestimationuncertaintiesforregionforestecosystemsarethehotanddi饿cultproblems．Thispapertakethebroad—JeaVed，EVergladepine，Massonpine，Chinese6r．Co

3、nif．erousmixedforest，broad．1eavedmixedf．orest，Bamboof．orest．Fmitsrand，bnlshandthebroadlealforest，Landgardenofmainf．oresttypesinGuangzhouCityasobjectofstudy．Theseforesttype’scarbonconcentrationindif．ferentorgans，regionforestecosystemcarbonstoragesize，carbonbalance，carbonnuxhavebeenresearchedma

4、inly．InordertoestimatethefunctionpreciselyofregionforestecosystemincarbonbalanceofGuangzhou，Seeksf-orthewaytoreducedtheuncertaintyaspactsinforestecosystemcarboncirculationresearch，ThemainresuhsareasfollowingFirst，throughpotassiumdichromateandvit^oloxidation，carbonconcentrationoftenforesttypes

5、inGuangzhoucitywasmeasuredandthevariationcharacterofitwasanalyzed．ThisresearchshowsthatcarboncontentoffIoreStVegetationrangesfrom40．06％to54．5％，andcarboncontentofarborlayeristhela唱est，secondislitterlayer，andtheleastisVegetationlayerundercan叩y．Conif．erousf．0resthashighercarboncontentthanbroad—l

6、eaVedforest．1talsosuggeststhattherearesomeV州ationsforcarboncontentamongdifferento唱ansinarborlayerandamongforesttypes．Second，accordingtothedataincorrelatiVereferrencesandforestresourceinVentoq，itismainlyreckonedthatcarbonstorageinvegetation，litterfallaboveandunderground，andSoiloftenforesttypes

7、inGuangzhoucity．Resultsindicatethatcarbonstorageinforestecosystemsisintheorderas：soillayer>vegetation>litterlayeraboVeandunderground．Androotmakesup0．29％～2．82％oftotaltreecarbon，thereforeitplaysanimpotantroleinthecarboncycleoff．orestecosystems．