中國753種陸生植物葉片中n和p的化學計量學

1、NewPhytologist《新植物學家》Leafnitrogenphosphusstoichiometryacross753terrestrialplantspeciesinChina中國753種陸生植物葉片中N和P的化學計量學WenxuanHanJingyunFangDaliGuoYanZhangDepartmentofEcologyCollegeofEnvironmentalSciencesKeyLabatyfEarthSurfa

2、ceProcessesoftheMinistryofEducationPekingUniversity100871BeijingChina韓文軒Summary（摘要）（摘要）?LeafnitrogenphosphusstoichiometryofChineseterrestrialplantswasstudiedbasedonanationaldatasetincluding753speciesacrossthecountry.中國陸生

3、植物葉片中N和P化學計量學研究基于全國性的數(shù)據(jù)收集，包括全國753種植物種。?Geometricmeanswerecalculatedffunctionalgroupsbasedonlifefmphylogenyphotosyntheticpathwayaswellasfall753species.TherelationshipsbetweenleafNPstoichiometrictraitslatitude(temperature)

4、wereanalysed.本文計算了所有753個物種基于生活型功能組的幾何平均數(shù)，發(fā)展史和光合途徑，并且分析了葉片中N和P的化學計量特征與緯度（溫度）之間的關(guān)系。?ThegeometricmeansofleafNPN:Pratiofthe753specieswere18.61.21mgg?114.4respectively.Withincreasinglatitude(decreasingmeanannualtemperatureMAT

5、)leafNPincreasedbuttheN:Pratiodidnotshowsignificantchanges.這753個物種的葉片NP以及N:P比率的幾何平均數(shù)分別為18.6mgg12.2mgg和14.4.隨著緯度的增加（意味著平均年均溫的減少），葉片中N和P的量隨之增加，但是N:P比率卻沒有顯著地變化。?AlthoughpatternsofleafNPN:Pratiosacrossthefunctionalgroupswere

6、generallyconsistentwiththosereptedpreviouslytheoverallN:PratioofChina’sflawasconsiderablyhigherthantheglobalaveragesprobablycausedbyagreatershtageofsoilPinChinathanelsewhere.TherelationshipsbetweenleafNPN:Pratiolatitude(

7、MAT)alsosuggestedtheexistenceofbroadbiogeographicalpatternsoftheseleaftraitsinChinesefla.盡管這些跨功能組中葉片NP和N:P比率的模式一般符合之前的文章，但是整個中國植物群落的N:P比率遠遠高于全球平均水平，由此可能導致相對于全球其他地方，中國土壤中嚴重缺乏P。葉片NPN:P比率與緯度（或年均溫）之間的關(guān)系也表明：在中國植物的這些葉子中存在著廣泛的生

8、物地理學特征。Keywds:Chinaleafnitrogen(N)phosphus(P)contentsN:PratioplantfunctionalgroupssoilP.關(guān)鍵詞：中國，葉片氮（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:10.1111j.14698137.2005.01530.xIntroducti

9、on（引言）（引言）Nitrogenphosphusplayvitalrolesinplantfunctioningareamongthemostimptantlimitingnutrientsinterrestrialecosystems(Chapin1980Reichetal.1997).AccdinglypatternsofNPstatusinplantbiomassespeciallyinleaveshavebeenstudie

10、dintensely(Foulds1993KoerselmanNielsenetal.1996Reichetal.MaterialsMethods（數(shù)據(jù)與方法）（數(shù)據(jù)與方法）Dataset（數(shù)據(jù)收集）（數(shù)據(jù)收集）WecollecteddatafromthepublishedliteratureonleafNPconcentrationsinChinesespeciesalongwiththegeographicalclimaticinf

11、mationassociatedwiththeleafsamples(AppendixS1availableonlineassupplementarymaterial).Ourdatabaseconsistsof2094observationsfrom127samplingsitesacrossChina(Fig.1)including753terrestrialplantspeciesin395genera116families.Fe

12、achsamplingsitewerecdedlocation(latitudelongitude)vegetationtypeclimatevariablesdocumentedfamilygenusspecieslifefms(treeshrubherbevergreendeciduousconiferbroadleafgymnospermangiosperm)leafNPcontentofplantsthemethodsusedf

13、leafNPanalysis(seeAppendixS1fdetails).我們從已發(fā)表的文獻中收集到的數(shù)據(jù)在葉N和P的濃度在中國物種隨著地理和氣候信息關(guān)聯(lián)葉樣品(附錄S1可用在線作為補充材料)。我們的數(shù)據(jù)庫包括2094個采樣點的觀測從127年在中國(圖1)其中包括753名陸生植物物種在395屬116個家庭。對于每個采樣點我們記錄的位置(經(jīng)度和緯度)植被類型和氣候變量和記錄家庭屬物種生命形式(樹灌木草常綠闊葉落葉針葉樹裸子植物和被子植物