常绿阔叶林藤本植物叶片N、P、K生态化学计量学特征.pdf

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1、南方农业学报JOURNALOFSOUTHERNAGRICULTUREISSN2095一l191：CODENNNXAABhttp：／／www．nfnyxb．cnDOI：10．3969／j：issn．2095-1191．2013．5．815常绿阔叶林藤本植物叶片N、P、K生态化学计量学特征王家妍，蓝嘉川，龙涛，谢益君，陆晓明，雷丽群，朱宏光，温远光‘(广西大学林学院．南宁530004)摘要：【目的】研究广西大明山国家级自然保护区常绿阔叶林中30种藤本植物叶片N、P、K生态化学计量学特征，为丰富群落生态化学计量学提供基础数据。【方法】在大明山天坪站保存完好的常绿阔叶林中设置20mx20in标准样地

2、80块，共3．2ha，在每个标准样地左下角设置5rex5in的小样方，对藤本植物多样性进行调查，根据重要值，采集30种藤本植物叶片，进行叶片N、P、K含量测定。【结果】叶片N、P、K变化范围分别为3．52～54．71、o．21～3．36、o．484．23g／kg。各个化学计量因子之问存在一定的线性关系，草质藤本叶片N：K含量均大于木质藤本，P含量差异不显著。【结论】大明山常绿阔叶林中多数藤本植物是受N或P或N：P的影响，约30％的种类受到N元素限制，而受到P元素限制的植物相对少；草质藤本叶片比木质藤本有更强的N、K元素存储能力。关键词：藤本植物；N；P；K；生态化学计量学；大明山中图分类号：

3、$718．3文献标志码：A文章编号：2095一1191(2013)05-0815—04Ecologicalstoichiometrycharacteristicsofnitrogen，phosphorusandpotassium。liamleafofevergreenbroad-leafforesttassiuminlianalea[Olevreenbroad-leaIrestWANGJia—yan，LANJia—chuan，LONGTao，XIEYi_jun，LUXiao-ming，LEILi-qun，ZHUHong—guang，WENYuan—guang+(ForestryCollege

4、ofGuangxiUniversity，Nanning530004，China)Abstract：【Objective]N，P，Kecologicalstoichiometrycharacteristicsof30kindsoflianaleavesinevergreenbroad-leafforestofDarningMountainnationalnaturereserveofGuangxiwerestudiedtoenrichbasicdataforcommunityecologicalstoi-chiometry．【Method】Eightyblocksof20m×20mstanda

5、rdsamplewiththetotalareaof3．2hainTianpingstationwell—Dre—servedevergreenbroad-leavedforestwerechosen，andthena5m×5mplotfromeverystandardsampleleftbottomwassettoobservethediversityofliana．Leavesof30lianaswerecollectedfordeterminingthecontentofN．P．Kinthelabbasedontheimportantvalue．【Result】Theresultssh

6、owedthatcontentsofN，PandKinleaveswere352-54．71抟g，021-3．369／kgand0．48—4．23班g，respectively．Thestoichiometricfactorshadcertainlinearrelationship．N：Kcontentofgrassmassvineleafwashigherthanthatofwoodyvines，andPcontentinleafwasnotsignificantdifferenthamongdifferentliana．【Conclusion]Mostlianaswereinnuence

7、dbyN，PorN：Pwithabout30％ofthespeciesbyNelement，however，fewplantswereaffectedbyPelement．GrassmassvineleavesgatheredmoreN，Kelementthanwoodyvines．Keywords：liana；N；P；K；ecologicalstoichiometry：DamingMountain0引言【研