文献类型：期刊文献

中文题名：广西猫儿山不同海拔常绿树种和落叶树种光合速率与氮的关系

英文题名：Photosynthesis-nitrogen relationship in evergreen and deciduous tree species at different altitudes on Mao′er Mountain,Guangxi

作者：白坤栋[1,2] 蒋得斌[3] 万贤崇[2]

第一作者：白坤栋

机构：[1]广西壮族自治区中国科学院广西植物研究所;[2]中国林业科学研究院林业新技术研究所;[3]广西猫儿山国家级自然保护区管理局

年份：2013

卷号：33

期号：16

起止页码：4930-4938

中文期刊名：生态学报

外文期刊名：Acta Ecologica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2013_2014】；

基金：国家自然科学基金资助项目(31100285);中央级公益性科研院所基本科研业务费专项资金(CAFINT2009C08);国家科技支撑计划课题(2012BAC16B01)

语种：中文

中文关键词：常绿树种;落叶树种;光合氮利用效率;海拔;双峰分布

外文关键词：evergreen tree species; deciduous tree species; photosynthetic nitrogen use efficiency; altitude; bimodal distribution

分类号：Q143.3

摘要：分析广西猫儿山不同海拔常绿和落叶树种的光合作用-氮关系,探讨光合氮利用效率(PNUE)是否受到叶片习性和海拔的影响。落叶树种的PNUE都显著高于常绿树种,这与前者有较低的比叶重(LMA)和较高的单位叶重光合速率(Amass)、氮含量和气孔导度(gs)有密切关系。高海拔树种的PNUE显著低于中低海拔树种的PNUE,这与前者较高的LMA和较低的Amass和gs相关。PNUE和相关的叶片特征的主成分分析表明常绿-落叶树种和低海拔-中海拔-高海拔树种的分布是一个自然过渡的过程。此外,PNUE与土壤碳:氮比没有显著相关性,但与年均温正相关,这表明温度气候是调节PNUE沿海拔变化的主要环境因素。因此,这种叶片习性和温度气候调节的PNUE变化可能是调节猫儿山常绿树种沿海拔形成双峰分布的一种机制。
The present study analyzed the photosynthesis-nitrogen relationship in evergreen and deciduous tree species at different altitudes on Mao′er Mountain,Guangxi,and explored whether photosynthetic nitrogen use efficiency（PNUE） was affected by leaf habit and altitude.Deciduous tree species had significanlty higher PNUE than evegreen tree species because of lower leaf mass per area（LMA） and higher photosynthetic rate per mass（Amass）,nitrogen content and stomatal conductance（gs） in the former.Tree species at high altitude had significantly lower PNUE than those at middle and low altitudes due to higher LMA and lower Amass and gs in the former.Principal component analysis for PNUE and its related leaf traits suggested that the tree species distribution of evergreen-deciduous and low-middle-high altitude were in the process of natural transition.In addition,PNUE was not related to soil carbon： nitrogen ratio,but significantly positive related to mean annual temperature,suggesting that temperature climate was the main environmental factor that regulated the altitudianl changes in PNUE.Therefore,this differential PNUE that was affected by leaf habit and temperature climate was a mechanism for the bimodal distribution of evergreen tree species along the altitudes on Mao′er Montain.