Changes in leaf nutrient traits and photosynthesis of four tree species: effects of elevated [CO_(2)], N fertilization and canopy positions

作     者：Juxiu Liu Deqiang Zhang Guoyi Zhou Honglang Duan 

作者机构：Key Laboratory of Vegetation Restoration and Management of Degraded EcosystemsSouth China Botanical GardenChinese Academy of SciencesGuangzhou 510650China 

出 版 物：《Journal of Plant Ecology》 (植物生态学报（英文版）)

年 卷 期：2012年第5卷第4期

页      面：376-390页

核心收录：

学科分类：0710[理学-生物学] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0401[教育学-教育学] 04[教育学] 0901[农学-作物学] 0902[农学-园艺学] 0713[理学-生态学] 

基　　金：National Natural Science Foundation of China(31070439) the Knowledge Innovation Program of the Chinese Academy of Sciences(KSCX2-EW-Q-8) the National Key Technology R&D Program(2009BADC6B02) the Natural Science Foundation of Guangdong Province,China(8351065005000001) 

主　　题：photosynthesis elevated CO_(2) nitrogen phosphorus subtropical China 

摘      要：Aims Leaf traits of trees exposed to elevated[CO_(2)]in association with other environmental factors are poorly understood in tropical and subtropical *** goal was to investigate the impacts of elevated[CO_(2)]and N fertilization on leaf traits in southern *** Four tree species,Schima superba *** Champ.(***),Ormosia pinnata(Lour.)Merr(***),Castanopsis hystrix ***.(***)and Acmena acuminatissima(Blume)*** Perry(***)were studied in a factorial combination of atmospheric[CO_(2)](ambient at~390μmol mol^(-1)and elevated[CO_(2)]at~700μmol mol^(-1))and N fertilization(ambient and ambient+100 kg N ha^(-1)year^(-1))in open-top chambers in southern China for 5 *** mass per unit leaf area(LMA),leaf nutrient concentration and photosynthesis(A_(sat))were *** Findings Results indicated that leaf traits and photosynthesis were affected differently by elevated[CO_(2)]and N fertilization among ***[CO_(2)]decreased LMA in all species,while N fertilization did not affect *** mass-based N concentration(N_(M))was significantly greater in *** and *** grown in elevated[CO_(2)]but was lower in *** mass-based P concentration(P_(M))was significantly greater in *** and *** exposed to elevated[CO_(2)]but was lower in ***.N fertilization significantly increased P_(M) in *** but decreased P_(M) in *** stimulation in ***,*** and *** was sustained after 5 years of CO_(2)fumigation.N fertilization did not modify the effects of elevated[CO_(2)]on *** traits(N_(M),N_(A),P_(M),P_(A))and light-saturated photosynthesis were decreased from the upper to lower *** position did not alter the responses of leaf traits and photosynthesis to elevated[CO_(2)].Results suggest that photosynthetic stimulation by elevated[CO_(2)]in native species in subtropical regions may be sustained in th