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1、NewPhytologist《新植物学家》Leafnitrogenandphosphorusstoichiometryacross753terrestrialplantspeciesinChina中国753种陆生植物叶片中N和P的化学计量学WenxuanHan,JingyunFang,DaliGuoandYanZhangDepartmentofEcology,CollegeofEnvironmentalSciencesandKeyLaboratoryforEarthSurfaceProcessesoftheMinistryofEducation,Pek
2、ingUniversity,100871,Beijing,China韩文轩Summary（摘要）•LeafnitrogenandphosphorusstoichiometryofChineseterrestrialplantswasstudiedbasedonanationaldatasetincluding753speciesacrossthecountry.中国陆生植物叶片中N和P化学计量学研究基于全国性的数据收集，包括全国753种植物种。•Geometricmeanswerecalculatedforfunctionalgroupsbasedon
3、lifeform,phylogenyandphotosyntheticpathway,aswellasforall753species.TherelationshipsbetweenleafNandPstoichiometrictraitsandlatitude(andtemperature)wereanalysed.本文计算了所有753个物种基于生活型功能组的几何平均数，发展史和光合途径，并且分析了叶片中N和P的化学计量特征与纬度（温度）之间的关系。•ThegeometricmeansofleafN,P,andN:Pratioforthe753spe
4、cieswere18.6and1.21mgg−1and14.4,respectively.Withincreasinglatitude(decreasingmeanannualtemperature,MAT),leafNandPincreased,buttheN:Pratiodidnotshowsignificantchanges.这753个物种的叶片N,P以及N:P比率的几何平均数分别为18.6mg/g,12.2mg/g和14.4.随着纬度的增加（意味着平均年均温的减少），叶片中N和P的量随之增加，但是N:P比率却没有显著地变化。•Althoughp
5、atternsofleafN,PandN:Pratiosacrossthefunctionalgroupsweregenerallyconsistentwiththosereportedpreviously,theoverallN:PratioofChina’sflorawasconsiderablyhigherthantheglobalaverages,probablycausedbyagreatershortageofsoilPinChinathanelsewhere.TherelationshipsbetweenleafN,PandN:Prati
6、oandlatitude(andMAT)alsosuggestedtheexistenceofbroadbiogeographicalpatternsoftheseleaftraitsinChineseflora.尽管这些跨功能组中叶片N,P和N:P比率的模式一般符合之前的文章，但是整个中国植物群落的N:P比率远远高于全球平均水平，由此可能导致相对于全球其他地方，中国土壤中严重缺乏P。叶片N,P,N:P比率与纬度（或年均温）之间的关系也表明：在中国植物的这些叶子中存在着广泛的生物地理学特征。Keywords:China,leafnitrogen(N)a
7、ndphosphorus(P)contents,N:Pratio,plantfunctionalgroups,soilP.关键词：中国，叶片氮（N）和磷（P）含量，N:P比率，植物功能群，土壤磷NewPhytologist(2005)168:377–385©NewPhytologist(2005)doi:10.1111/j.1469-8137.2005.01530.xIntroduction（引言）Nitrogenandphosphorusplayvitalrolesinplantfunctioning,andareamongthemostimport
8、antlimitingnutrientsinterrestrialecosystems(Cha
