DOI: 10.1111/gcb.12022
论文题名: Nitrogen to phosphorus ratios of tree species in response to elevated carbon dioxide and nitrogen addition in subtropical forests
作者: Liu J. ; Huang W. ; Zhou G. ; Zhang D. ; Liu S. ; Li Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 1 起始页码: 208
结束页码: 216
语种: 英语
英文关键词: Carbon dioxide
; N : P ratios
; N addition
; N2 fixer
; Subtropical forests
Scopus关键词: carbon dioxide
; nitrogen
; phosphorus
; carbon dioxide
; concentration (composition)
; deposition
; forest ecosystem
; nitrogen
; phosphorus
; stoichiometry
; tree
; tropical forest
; article
; metabolism
; tree
; Carbon Dioxide
; Nitrogen
; Phosphorus
; Trees
; China
英文摘要: Increased atmospheric carbon dioxide (CO2) concentrations and nitrogen (N) deposition induced by human activities have greatly influenced the stoichiometry of N and phosphorus (P). We used model forest ecosystems in open-top chambers to study the effects of elevated CO2 (ca. 700 μmol mol-1) alone and together with N addition (100 kg N ha-1 yr-1) on N to P (N : P) ratios in leaves, stems and roots of five tree species, including four non-N2 fixers and one N2 fixer, in subtropical China from 2006 to 2009. Elevated CO2 decreased or had no effects on N : P ratios in plant tissues of tree species. N addition, especially under elevated CO2, lowered N : P ratios in the N2 fixer, and this effect was significant in the stems and the roots. However, only one species of the non-N2 fixers showed significantly lower N : P ratios under N addition in 2009, and the others were not affected by N addition. The reductions of N : P ratios in response to elevated CO2 and N addition were mainly associated with the increases in P concentrations. Our results imply that elevated CO2 and N addition could facilitate tree species to mitigate P limitation by more strongly influencing P dynamics than N in the subtropical forests. © 2012 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62556
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China; University of Chinese Academy of Sciences, Beijing, 100049, China
Recommended Citation:
Liu J.,Huang W.,Zhou G.,et al. Nitrogen to phosphorus ratios of tree species in response to elevated carbon dioxide and nitrogen addition in subtropical forests[J]. Global Change Biology,2013-01-01,19(1)