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1、题目：皇藏峪自然保护区优势乔木树种生态化学计量学初步研究题目：皇藏峪自然保护区优势乔木树种生态化学计量学初步研究皇藏峪自然保护区优势乔木树种生态化学计量学初步研究摘要：本论文主要研究皇藏峪自然保护区5种不同群落优势乔木植物叶片和上壤的C、N、P、K含量及其化学计量学特征以及植物叶片特征之间的相互关系。1.皇藏峪自然保护优势乔木树种叶片碳元素含量保持相对稳定的变化趋势，关键词：皇藏峪自然保护区；优势乔木；群落演替；生态化学计量学；叶性状PreliminaryStudyofEcologicalStoichiometryforDominantTreeSpeciesinHuan
2、gcangyuNatureReserveAbstract：ThispaperstudiestherelationshipinfivedifferentcommunitiesondominanttreeplantleavesandsoilofC,N,P,KcontentandcharacteristicsandfeaturesofplantleavesstoichiometryinHuangcangyuNatureReserve.Bystudyingthefollowingconclusions:(1)DominantTreespeciesleafofC:Nwithsea
3、sonsnosignificantdifferenceinthechange,showingastabletrend.(2)DominantTreespeciesofleafC,N,P,Kcontent,showedanupwardtrend,photosyntheticratealsoincreasedwiththeprogressofsuccessionandoverall.LeavesC,showedasignificantpositivecorrelationbetweentheN,P,Kcontentandphotosyntheticrate,fromApri
4、ltoMayinSpring,inHuangcangyuNatureReserve.(3)DominantTreespeciesleafofC:Phavesignificantdynamiccharacteristicsintermsoftheseason,C:PinSpringwassignificantlylowerthaninotherseasons,inHuangcangyuNatureReserve.(4)Fromtheseasonalpointofview,whenplantsareinvigorous,fast-growingplantsasdemandr
5、equiresalotofN,P,sothemostlikelycommonlimitN,Psubject,ratherthanthegrowingseasononlyrestrictedbyP,thegrowingseason.(5)dominantTreeSpeciesindifferentcommunitiesandindifferentseasons,theplantleavesandsoilofN,P,K,thetrendisbasicallythesamecontent.LeafofN,PcontentandsoiltotalN,totalPcontento
6、fthecorrelationwasnotsignificant,butleavesK,contentandthesoilwasasignificantpositivecorrelationbetweenthetotalKcontent,inHuangcangyuNatureReserve.(6)DominanttreepopulationsincommunityspecificleafweightandleafN,P,Amasshaveasignificantnegativecorrelation.WiththeCcontentwassignificantlyposi
7、tivelycorrelated.(7)DominantTreespeciesinthesmall-scalelevelofKcontentinleavesandN:Pintheeconomiccharacteristicsoftheleavesarejustweakfactor,inHuangcangyuNatureReserve.(8)LeavesthevastmajorityofplantparametersandAmassthanthecorrelationbetweenastrongcorrelationwiththeAare,
