Water-use efficiency of four native trees under CO_(2) enrichment and N addition in subtropical model forest ecosystems

作     者：Yiyong Li Juxiu Liu Genyun Chen Guoyi Zhou Wenjuan Huang Guangcai Yin Deqiang Zhang Yuelin Li 

作者机构：Key Laboratory of Vegetation Restoration and Management of Degraded EcosystemsSouth China Botanical GardenChinese Academy of SciencesXingke Road 723Guangzhou 510650China Graduate University of Chinese Academy of SciencesBeijing 100049China Institute of Plant Physiology and EcologyShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200032China Guangdong University of TechnologyGuangzhou 510006China 

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

年 卷 期：2015年第8卷第4期

页      面：411-419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）] 09[农学] 0901[农学-作物学] 0902[农学-园艺学] 0713[理学-生态学] 

基　　金：South China Botanical Garden-Shanghai Institute of Plant Physiology&Ecology Joint Fund,Science and Technology Innovation Project of Guangdong Province Forestry(Grant No.2012KJCX019-02) the National Natural Science Foundation of China(Grant No.31370530) 

主　　题：tree species water-use efficiency CO_(2)enrichment N addition subtropical China 

摘      要：Aims We aimed to evaluate the changes in water-use efficiency(WuE)in native tree species in forests of subtropical China,and determine how coexisting species would be responding to increases in atmospheric carbon dioxide(CO_(2))concentrations and nitrogen(N)*** We used model forest ecosystems in open-top chambers to study the effects of elevated CO_(2)(ca.700μmol mol−1)alone and together with N addition(NH4No3 applied at 100 kg N ha−1year−1)on WuE of four native tree species(Schima superba,Ormosia pin-nata,Castanopsis hystrix and Acmena acuminatissima)from 2006 to *** findingsour result indicated that all species increased their WuE when they were exposed to elevated CO_(2).although higher WuE was shown in faster-growing species(*** and ***)than that of slower-growing species(*** and Acmena acuminatissima),the increased extent of WuE induced by elevated CO_(2) was higher in the slower-growing species than that of the faster-growing species(P0.01).the N treatment decreased WuE of ***,while the effects on other species were not *** interactions between elevated CO_(2) and N addition increased intrinsic WuE of *** significantly(P0.001),however,it did not affect WuE of the other tree species *** conclude that the responses of native tree species to elevated CO_(2) and N addition are different in subtropical *** species-specific effects of elevated CO_(2) and N addition on WuE would have important implications on species composition in China’s subtropics in response to global change.