DOI: 10.1007/s10533-018-0442-1
Scopus记录号: 2-s2.0-85045273185
论文题名: Effects of long-term nitrogen deposition on phosphorus leaching dynamics in a mature tropical forest
作者: Zhou K. ; Lu X. ; Mori T. ; Mao Q. ; Wang C. ; Zheng M. ; Mo H. ; Hou E. ; Mo J.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 138, 期: 2 起始页码: 215
结束页码: 224
语种: 英语
英文关键词: Nitrogen deposition
; Phosphorus cycling
; Phosphorus leaching
; Tropical forest
英文摘要: Elevated anthropogenic nitrogen (N) deposition is suggested to affect ecosystem phosphorus (P) cycling through altered biotic P demand and soil acidification. To date, however, there has been little information on how long-term N deposition regulates P fluxes in tropical forests, where P is often depleted. To address this question, we conducted a long-term N addition experiment in a mature tropical forest in southern China, using the following N treatments: 0, 50, 100, and 150 kg N ha−1 year−1. We hypothesized that (i) tropical forest ecosystems have conservative P cycling with low P output, and (ii) long-term N addition decreases total dissolved phosphorus (TDP) leaching losses due to reduced litter decomposition rates and stimulated P sorption deriving from accelerated soil acidification. As hypothesized, we demonstrated a closed P cycling with low leaching outputs in our forest. Under experimental N addition, TDP flux in throughfall was significantly reduced, suggesting that N addition may result in a less internal P recycling. Contrary to our hypothesis, N addition did not decrease TDP leaching, despite reduced litter decomposition and accelerated soil acidification. We find that N addition might have negative impacts on biological P uptake without affecting TDP leaching, and that the amount of TDP leaching from soil could be lower than a minimum concentration for TDP retention. Overall, we conclude that long-term N deposition does not necessarily decrease P effluxes from tropical forest ecosystems with conservative P cycling. © 2018, Springer International Publishing AG, part of Springer Nature. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83168
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, and Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, 723 Xingke Road, Tianhe District, Guangzhou, Guangdong, China; University of Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Zhou K.,Lu X.,Mori T.,et al. Effects of long-term nitrogen deposition on phosphorus leaching dynamics in a mature tropical forest[J]. Biogeochemistry,2018-01-01,138(2)