DOI: 10.1007/s10533-016-0265-x
Scopus记录号: 2-s2.0-84991784070
论文题名: Effects of phosphorus addition with and without nitrogen addition on biological nitrogen fixation in tropical legume and non-legume tree plantations
作者: Zheng M. ; Li D. ; Lu X. ; Zhu X. ; Zhang W. ; Huang J. ; Fu S. ; Lu X. ; Mo J.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2016
卷: 131, 期: 2018-01-02 起始页码: 65
结束页码: 76
语种: 英语
英文关键词: Biological nitrogen fixation
; Legume tree
; Non-legume tree
; Phosphorus addition
; Plantation
Scopus关键词: atmospheric deposition
; biogeochemical cycle
; legume
; nitrogen
; nitrogen fixation
; phosphorus
; plantation
; soil nitrogen
; tropical forest
; woody plant
; China
; Acacia auriculiformis
; Eucalyptus urophylla
英文摘要: It is well documented that phosphorus (P) input stimulates biological nitrogen (N) fixation (BNF) in tropical forests with non-legume trees. However, in tropical legume forests with soil N enrichment and P deficiency, the effects of P availability and its combination with N on BNF remain poorly understood. In this study, we measured BNF rate in different compartments, i.e., bulk soil, forest floor, rhizosphere, and nodules, in two tropical plantations with legume trees Acacia auriculiformis (AA) versus non-legume trees Eucalyptus urophylla, (EU) in southern China after 4 years of P addition and combined N and P additions. The objective was to investigate how P addition and its combination with N addition regulate BNF in a tropical legume plantation, and to compare the effects with those in a non-legume plantation. Our results showed that total BNF rates were significantly higher in the P-addition plots than in the control plots by 27.4 ± 4.3 and 23.3 ± 1.7 % in the EU and AA plantations, respectively. Total BNF rates were significantly higher in the NP-addition plots than in the control plots by 27.7 ± 5.0 and 8.5 ± 1.4 % in the EU and AA plantations, respectively, which contrasted to our previous result that total BNF rates were significantly lower in N-addition plots than in the control plots in the AA plantation. These findings suggest that P input can stimulate BNF in tropical forest biome dominated by legume trees, even in consideration of elevated atmospheric N deposition. Thus, our study revealed the important role of P in regulating biological N input, which should be taken into account in the modeling of biogeochemical cycles in the future. © 2016, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83335
Appears in Collections: 气候减缓与适应 气候变化事实与影响
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作者单位: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; Key Laboratory of Agro-ecological Processes in Subtropical Region, Chinese Academy of Sciences, Changsha, China; State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Root Biology Center, South China Agricultural University, Guangzhou, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Zheng M.,Li D.,Lu X.,et al. Effects of phosphorus addition with and without nitrogen addition on biological nitrogen fixation in tropical legume and non-legume tree plantations[J]. Biogeochemistry,2016-01-01,131(2018-01-02)